AT527080B1 - Machine tool, and a method for operating the machine tool - Google Patents

Abstract

The invention relates to a machine tool (1) comprising: a machine frame (4); at least one first work spindle (5) which is mounted for rotation about a first spindle axis (7), wherein the first spindle axis (7) is arranged parallel to a horizontal Z-axis (9); a workpiece clamping device (38) which is designed to receive at least one first workpiece (2); a tool magazine (62) for storing different machining tools (16), wherein at least one storage level (63) with a plurality of tool receiving locations (64, 65) arranged next to one another is provided in the tool magazine (62). The tool receiving locations (64, 65) are aligned parallel to the horizontal Z-axis (9), wherein the machining tools (16) can be received in the tool magazine (62) aligned parallel to the horizontal Z-axis (9), and wherein the individual tool receiving locations (64, 65) are arranged next to one another at a distance from one another in a horizontal X-axis (10).

Description

Description

[0001] The invention relates to a machine tool and a method for operating the machine tool.

[0002] WO2006050551A2 discloses a machine tool with a tool magazine. The tool magazine is arranged next to the machine tool. The work spindles are aligned horizontally. The machining tools are pivoted 90° to the work spindle and stored in the tool magazine next to the machine tool.

[0003] The machine tool disclosed in WO2006050551A2 has the disadvantage of its complex structure. Furthermore, changing tools is time-consuming.

[0004] The object of the present invention was to overcome the disadvantages of the prior art and to provide a machine tool and a method which has a simple structure and enables easy tool changing.

[0005] This object is achieved by a machine tool and a method according to the claims.

[0006] According to the invention, a machine tool is designed. The machine tool comprises:

a machine frame;

at least one first work spindle which is rotatably mounted about a first spindle axis, wherein the first spindle axis is arranged parallel to a horizontal Z-axis;

a workpiece clamping device which is designed to receive at least one first workpiece;

a tool magazine for storing different machining tools, wherein at least one storage level with several tool receiving locations arranged next to one another is provided in the tool magazine.

The tool holders are aligned parallel to the horizontal Z-axis, whereby the machining tools can be accommodated in the tool magazine aligned parallel to the horizontal Z-axis and whereby the individual tool holders are arranged next to each other at a distance from each other in a horizontal X-axis.

[0007] The machine tool according to the invention offers the advantage that these measures allow for easy tool changes. Furthermore, the machine tool can have a simple structure. Furthermore, the machine tool can be operated more efficiently.

[0008] If the machining tools are mounted in the tool magazine parallel to the horizontal Z-axis, this means that a rotation axis of the respective machining tool is parallel to the horizontal Z-axis.

[0009] The horizontal alignment of the tool holders allows tools to be easily placed in them and held in place by gravity. Thus, the tool holders do not need to have complex mountings.

[0010] Furthermore, it may be expedient to arrange several tool holding positions one behind the other in the tool magazine, offset along the Z-axis. This has the advantage that this measure allows for increased storage capacity in the tool magazine.

[0011] Furthermore, it can be provided that the tool holding positions have a longitudinal extension in the Z-axis, wherein the longitudinal extension of at least some of the successively arranged tool holding positions is adjustable. This has the advantage that this measure allows the available space in the tool magazine to be used as optimally as possible in order to accommodate as many machining tools as possible.

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The longitudinal extent of the tool holders defines the maximum tool length that can be accommodated for machining tools. The tool length of the machining tool to be accommodated at the tool holder is therefore preferably smaller than the longitudinal extent of a tool holder in which the machining tool is to be accommodated. In particular, it can be provided that the longitudinal extent of the tool holders is adapted to the tool length of the longest machining tool to be accommodated.

[0012] In particular, it can be provided that different machining tools with different tool lengths are arranged in a row. Furthermore, it can be provided that individual machining tools extend beyond two or more of the tool receiving locations. Of course, no tool can be accommodated in the corresponding tool receiving location into which a tool extends.

[0013] Furthermore, it can be provided that the tool magazine comprises a first receiving comb and a second receiving comb, wherein the first receiving comb has first receiving recesses and the second receiving comb has second receiving recesses, wherein the first receiving comb and the second receiving comb are arranged at a distance from one another in the extension of the horizontal Z-axis, wherein one of the first receiving recesses serves to deposit a first of the processing tools and one of the second receiving recesses serves to deposit another of the processing tools. Such a design has the advantage that the processing tool can be easily deposited in the receiving combs and otherwise no positive connection is required to stabilize the processing tools during deposit. The receiving combs can engage in the processing tools in such a positive manner that the processing tools can be held stably in the receiving combs. In particular, it can be provided that the processing tools each have a groove corresponding to the receiving comb.

[0014] In particular, it can be provided that the first receiving comb and the second receiving comb are arranged at a distance from one another in such a way that a first of the processing tools can be received in the first receiving comb and the second receiving comb is not in the way of the first processing tool.

[0015] Also advantageous is an embodiment according to which it can be provided that the first receiving comb and/or the second receiving comb are designed to be displaceable along the horizontal Z-axis relative to the machine frame. This measure allows the longitudinal extent of the tool receiving locations to be adjusted, so that the longitudinal extent of the tool receiving locations can be adapted to the length of the tools to be accommodated in such a way that the longitudinal extent of the tool receiving locations is not greater than the length of the longest tool to be accommodated. In particular, it can be provided that the longitudinal extent of the tool receiving locations is defined by the distance between the first receiving comb and the second receiving comb.

[0016] In particular, it can be provided that the individual receiving combs are designed to be displaceable individually and independently of one another along the horizontal Z-axis relative to the machine frame.

[0017] According to a further development, it is possible for the first receiving comb to be arranged on a comb holder, wherein the comb holder is arranged above the first work spindle and is designed to be displaceable along the horizontal Z-axis, in particular that the comb holder simultaneously forms part of the housing of a machining space of the machine tool. This has the advantage that the first receiving comb can be moved by means of the comb holder. If the comb holder forms part of the housing of the machining space of the machining machine, this can have the simplest and most efficient structure possible. In particular, it can be achieved that when the comb holder is displaced along the horizontal Z-axis, the housing of the machining space of the machine tool is opened and thus the machine tool for

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becomes accessible for tool changes.

[0018] Furthermore, it can be provided that the longitudinal extent of at least two tool holding positions arranged side by side with respect to the horizontal Z-axis can be adjusted independently of one another. This has the advantage that the same longitudinal extent does not have to be set across the entire width of the tool magazine. Thus, the available space in the tool magazine can be better utilized.

[0019] Furthermore, it may be expedient for the tool magazine to comprise a third receiving comb and a fourth receiving comb, the third receiving comb having third receiving recesses and the fourth receiving comb having fourth receiving recesses, the third receiving comb being arranged spaced apart from the first receiving comb in the horizontal X-axis, and the fourth receiving comb being arranged spaced apart from the second receiving comb in the horizontal X-axis, the first receiving comb, the second receiving comb, the third receiving comb, and the fourth receiving comb being designed to be displaceable independently of one another along the horizontal Z-axis relative to the machine frame. This measure can further increase the flexibility of the machine tool.

[0020] Furthermore, it can be provided that at least two of the receiving recesses are arranged next to each other for each work spindle. This has the advantage that, for each work spindle, a machining tool can be placed in one of the receiving recesses, and another machining tool can be picked up from one of the receiving recesses.

[0021] Furthermore, it can be provided that a tool changing device is designed for changing the processing tools. Furthermore, it can be provided that the tool changing device comprises a first gripping device.

[0022] The first gripping device may comprise a first gripping unit and a second gripping unit. The first gripping unit and the second gripping unit may be spaced apart from one another with respect to the X-axis by a first gripping unit spacing.

[0023] In particular, it can be provided that the first gripping unit distance is equal to the distance between the individual receiving troughs or a multiple of the distance between the individual receiving troughs.

[0024] Furthermore, it can be provided that the first gripping device is assigned to the first work spindle. In particular, it can be provided that a first of the machining tools, which is clamped in the first work spindle, can be removed by means of the first gripping unit, and then a second of the machining tools, which is held in the second gripping unit, can be inserted into the first work spindle.

[0025] In particular, it can be provided that the first gripping unit and the second gripping unit are aligned such that the machining tools can be accommodated in the respective gripping unit aligned parallel to the Z-axis.

[0026] Furthermore, it can be provided that a second gripping device is accommodated on the gripping device carrier, which second gripping device has a third gripping unit and a fourth gripping unit. The third gripping unit and the fourth gripping unit can be arranged at a distance from one another with respect to the X-axis at a second gripping unit distance.

[0027] The function and dimensions of the second gripping device can be configured mutatis mutandis to the first gripping device. Furthermore, it can be provided that the second gripping device is assigned to the second work spindle.

[0028] Furthermore, it can be provided that the first gripping device and the second gripping device are arranged at a gripping device distance from each other.

[0029] Furthermore, it can be provided that a third gripping device and a fourth gripping device are arranged on the gripping device carrier.

[0030] The third gripping device can be assigned to the third work spindle. The fourth gripping device can be assigned to the fourth work spindle. The third gripping device or

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The fourth gripping device can be designed mutatis mutandis to the first gripping device and can also each have two gripping units.

[0031] Furthermore, it can be provided that the tool changing device has a gripping device head. The gripping device carrier can be arranged on the gripping device head so that it can be displaced along the X-axis. In particular, it can be provided that the gripping device carrier is coupled to a gripping device carrier rail, which is displaceably received in a gripping device head carriage. The gripping device head carriage can be arranged on the gripping device head. Furthermore, it can be provided that a gripping device carrier adjustment motor is formed, by means of which the gripping device carrier can be displaced relative to the gripping device head.

[0032] Furthermore, it can be provided that the gripping device head is arranged on a gripping device height adjustment mount so as to be displaceable in the Y-axis. A guide system can also be formed between the gripping device head and the gripping device height adjustment mount.

[0033] Furthermore, the gripping device height adjustment mount can be designed to be telescopic. This offers the advantage of better accessibility to the lower-lying spindles.

[0034] Furthermore, it can be provided that a gripping device main support is formed, which extends along the Z-axis. In particular, it can be provided that the gripping device height adjustment mount is mounted on the gripping device main support so as to be displaceable along the Z-axis. A guide system can also be formed between the gripping device main support and the gripping device height adjustment mount.

[0035] Furthermore, it can be provided that the gripping device main carrier is held on the machine frame by means of a first holder or by means of a second holder.

[0036] Furthermore, it can be provided that a first gripping device is designed for exchanging the machining tool accommodated in the first work spindle, wherein the gripping device has at least a first gripping unit and a second gripping unit, which are arranged at a gripping unit spacing from one another, in particular that the first gripping device is displaceable exclusively along the X-axis and along a vertical Y-axis, but not along the Z-axis. This has the advantage that the gripping device can have a simple structure and, moreover, the tool change can be carried out easily.

[0037] Particularly in conjunction with a receiving comb which is displaceable along the Z-axis and which is arranged above the work spindles, it can be efficient if the first gripping device is displaceable exclusively along the X-axis and along a vertical Y-axis, but not along the Z-axis.

[0038] Furthermore, it may be expedient to provide a second work spindle which is arranged next to the first work spindle with respect to the horizontal X-axis, in particular for the second work spindle to be assigned to a second tool receiving location. The tool magazine according to the invention is particularly advantageous for a machine tool configured in this way with two work spindles arranged side by side, since the machine tool must have a large width anyway due to the side-by-side arrangement of the work spindles, thus optimizing the available space.

[0039] Furthermore, it can be provided that the first receiving comb has first lower receiving troughs opposite the first receiving troughs and the second receiving comb has second lower receiving troughs opposite the second receiving troughs, wherein the first receiving comb is designed to be pivotable by 180° with respect to a horizontal axis, so that either the first receiving troughs or the first lower receiving troughs can be arranged on top, wherein the first receiving comb and/or the second receiving comb has a locking device for securing the processing tools, so that the respective processing tools located underneath are secured against falling out.

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This has the advantage that the storage capacity of the tool magazine can be further increased. In particular, the locking device can be designed in the form of a positive and frictional clamping device, which serves to hold the machining tools in the receiving recesses.

[0040] Furthermore, it can also be provided that the second receiving comb is designed to be pivotable by 180° with respect to a horizontal axis, so that either the second receiving troughs or the second lower receiving troughs can be arranged on top.

[0041] In particular, it can be provided that the gripping device serves to actuate the locking device.

[0042] The locking device prevents the lower processing tools from falling out. Locking the processing tools can also be advantageous when manipulating the receiving comb with the handling system.

[0043] Furthermore, it can be provided that the first receiving comb and the second receiving comb, together with the machining tools received thereon, are interchangeable by means of a handling system. This has the advantage that the receiving combs can be pre-loaded with machining tools and inserted into the machine tool. Thus, several machining tools can be fed into or removed from the machine tool simultaneously. Such a handling system can be, for example, an articulated-arm robot. Furthermore, it is also conceivable for the tool changing device itself to be used to replace the receiving comb.

[0044] Furthermore, it can be provided that more tools of the same type are accommodated next to one another in the tool storage, in particular in adjacent tool holding locations, than the number of existing work spindles. This measure can ensure that at least one tool of the same type can always be kept in reserve. Thus, in the event of a single tool breakage, this individual tool can be replaced.

[0045] According to the invention, a method for operating a machine tool is provided. The machine tool comprises a machine frame, a first work spindle mounted for rotation about a first spindle axis, wherein the first spindle axis is arranged parallel to a horizontal Z-axis, and a workpiece clamping device configured to receive at least one first workpiece, and a tool magazine for storing different machining tools. The tool magazine includes at least one storage level with a plurality of adjacent tool receiving locations, wherein the tool receiving locations are aligned parallel to the horizontal Z-axis, and wherein the tool receiving locations are arranged adjacent to one another with respect to a horizontal X-axis. The method comprises the following method steps:

- machining the first workpiece by means of a machining tool mounted in the first work spindle;

- Changing the machining tool, whereby the machining tool previously held in the first work spindle is placed parallel to the horizontal Z-axis in one of the tool holder positions in the tool magazine.

[0046] The method according to the invention offers the advantage that the machining tools do not need to be pivoted during the tool change. This allows the tool change to be carried out more quickly and efficiently.

[0047] According to a further development, it is possible that in order to change the machining tool, a machining tool deposited in a first receiving comb of a comb holder of the tool magazine is gripped by means of a first gripping unit of a gripping device and is lifted along the Y-axis, wherein the comb holder is arranged above the first work spindle, and wherein the comb holder is subsequently moved along the Z-axis, so that the gripping device is moved along the Y-axis into the machining

space without the gripping device having to be moved along the Z-axis,

The machining tool located in the first work spindle is picked up by a second gripping unit of the gripping device, and the machining tool located in the first gripping unit is inserted into the first work spindle. This has the advantage that this measure allows for easy changing of the machining tool.

[0048] To remove a machining tool from the first work spindle or to insert a machining tool into the first work spindle, the displaceability of the first work spindle along the Z-axis can be used.

[0049] Furthermore, it may be expedient if a plurality of tool holding positions are arranged one behind the other in the tool magazine, offset along the Z-axis, wherein the tool holding positions have a longitudinal extension along the Z-axis, wherein the longitudinal extension of at least some of the tool holding positions arranged one behind the other is adjustable, wherein the longitudinal extension of the tool holding positions in the Z-axis is adapted to a tool length of the machining tools to be deposited, wherein a different longitudinal extension is set in different tool holding positions arranged one behind the other. This has the advantage that this measure allows the space in the tool magazine to be used in the best possible way. Furthermore, this measure allows the travel paths of the gripping device to be kept as short as possible, so that the efficiency of the machine tool can be as high as possible.

[0050] Furthermore, it can be provided that in a computer-implemented method step, a storage position of the machining tools and the necessary longitudinal extension of the individual tool holder locations in the Z-axis are calculated by means of a digital computer, wherein the calculation serves to minimize the tool change time and wherein the following parameters are taken into account in the calculation:

- a travel speed of a gripping device;

- the distance from the respective tool holder location to the first work spindle;

- the frequency of use of the machining tools to be stored. This has the advantage that this measure can improve the efficiency of the machine tool. The calculation can take into account that frequently used machining tools are arranged as close as possible to the respective work spindle. Furthermore, machining tools with the shortest possible tool length can be arranged as close as possible to the respective work spindle, whereby the longitudinal extent of the tool holders can be adapted to the tool length so that the longitudinal extent of the tool holders is as short as possible and all of the machining tools arranged one behind the other are arranged as close as possible to the first work spindle in the Z-axis extension.

[0051] Furthermore, it can be provided that it is taken into account that different machining tools with a similar tool length are placed next to each other at tool holding locations with the same longitudinal extent, so that the occupancy density of the tool magazine can be kept as high as possible.

[0052] Furthermore, it may be expedient to use the gripping device to adjust the longitudinal extent of the tool holder locations along the Z-axis. This has the advantage that this measure allows the complexity of the machine tool to be kept as low as possible, since the number of drives or the number of moving components of the machine tool can be kept as low as possible.

[0053] Furthermore, it can be provided that the first longitudinal extension of the first tool holder is adapted to the tool length of the longest of the machining tools to be accommodated in the first tool holder. The second longitudinal extension of the second tool holder can, of course, also be adapted to the tool length of the longest of the machining tools to be accommodated in the second tool holder.

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[0054] Furthermore, it can be provided that the machining tools held in the tool magazine are repositioned by means of the gripping device when the gripping device is not currently performing a tool change. This has the advantage that this measure allows the tool change time to be kept as short as possible.

[0055] Furthermore, it can be provided that the longitudinal extent of individual tool holder locations is adjusted during re-finishing. This measure can achieve the best possible utilization of the space available in the tool magazine.

[0056] Furthermore, it can be provided that the method comprises the following method steps:

- Removing a last used machining tool from the work spindle by means of the first gripping unit;

- Inserting a machining tool held in the second gripping unit into the work spindle;

- Moving the gripping device to the tool magazine to pick up a new machining tool from the tool magazine into the gripping device and simultaneously depositing the last used machining tool from the gripping device into the tool magazine; and at the same time

- Machining a workpiece using the machining tool mounted in the work spindle.

[0057] This is advantageous because the time required to retrieve a machining tool from the tool storage can be kept as short as possible. This is particularly advantageous when the machining operations take only a very short time and a new machining tool is needed as quickly as possible.

[0058] Furthermore, it can be provided that a second work spindle is arranged next to the first work spindle, wherein the work spindles are arranged parallel to one another and each serve to hold a machining tool, and that the tool changing device has a second gripping device, wherein the two gripping devices are moved synchronously with one another and simultaneously operate the two work spindles. Thus, the two work spindles can be operated synchronously with one another.

[0059] Furthermore, it may be expedient if, in order to receive a new machining tool from the tool magazine into the gripping device and simultaneously deposit the last used machining tool from the gripping device into the tool magazine, the machining tools are arranged in the storage plane such that the new machining tool is arranged at a first tool receiving location and a second tool receiving location is free at the gripping unit distance from the first tool receiving location, which second tool receiving location serves to deposit the last used machining tool from the gripping device into the tool magazine. The advantage here is that, through this measure, the gripping device with the two gripping units and the machining tool received in one gripping unit can be moved to the respective storage unit in order to deposit the machining tool. The machining tool is guided into the free tool receiving location. At the same time, the newly provided machining tool is gripped by means of the still free gripping unit and can thus be guided to the work spindle of the machining system. The time required to deposit the old machining tool and pick up the new one can be kept to a minimum because the gripping device does not have to move to two different positions in the tool magazine; instead, the old machining tool can be deposited and the new machining tool picked up simultaneously in a single operation. The machining tools are positioned in the tool magazine in such a way that the described machining steps are possible. In particular, it can be provided that at least one of the tool holding positions per holding comb is free to enable recurring sorting.

[0060] Furthermore, it can be provided that, for selected processing operations,

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Particularly in machining processes with long machining times, the machining tools stored in the tool magazine are re-sorted using the gripping device during machining of the workpiece. The advantage here is that the machining tools can be re-sorted according to the future machining steps planned in order to always find a free tool holder location next to a machining tool to be changed, thus enabling the tool changing process according to the invention.

[0061] Furthermore, it may be expedient if machining tools that follow in the machining sequence those machining tools used for shorter machining steps are stored closer to the work spindle than machining tools that follow in the machining sequence those machining tools used for longer machining steps. This measure can ensure a rapid tool changeover during machining using a machining tool with a short machining time, since the gripping device only has to travel short distances. This allows a new machining tool to be retrieved from the tool storage even during this short period of time.

[0062] According to a further development, it is possible for machining tools that are used more frequently to be stored closer to the work spindle than machining tools that are used less frequently. This measure ensures a quick changeover process for machining tools that are used more frequently, since the gripping device only has to travel short distances.

[0063] Furthermore, it may be expedient for the last-used machining tool, after being removed from the work spindle, to be fed by the gripping device to a measuring device in which wear of the machining tool is detected. The advantage here is that this measure allows the wear of the machining tool or any breakage of the machining tool to be detected. This allows a replacement of the machining tool to be requested before the machining tool is stored in the tool magazine, or the machining tool can be placed in an appropriate location where it can be replaced.

[0064] A possible procedure for changing the machining tools can be as follows.

[0065] At the start of the tool change process, a new machining tool, which is to be used in the next machining step, can be located in the first gripping unit of each gripping device. Furthermore, the second gripping units of each gripping device can be free to receive a machining tool. The gripping devices are moved toward the work spindles in such a way that the machining tool currently held in the work spindle can be gripped and removed from the work spindle by means of the second gripping unit.

[0066] To remove the machining tools from the work spindles, the individual gripping devices can be moved along the Z-axis. Alternatively or additionally, the individual work spindles can also be moved in the opposite direction along the Z-axis. If the individual work spindles are also moved along the Z-axis, the superimposed movement can significantly shorten the tool change time.

[0067] Subsequently, the gripping devices arranged on the gripping device carrier are moved along the X-axis relative to the gripping device head by means of the gripping device carrier adjustment motor, so that the new machining tool, which is accommodated in the first gripping units, can be inserted into the work spindle. Alternatively or additionally, the individual work spindles can also be moved in the opposite direction along the X-axis. If the individual work spindles are additionally moved along the X-axis

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moved, the tool change time can be significantly reduced by the superimposed movement.

[0068] When the machining tool is inserted into the work spindle, the machining tool held in the second gripping unit can be moved to the tool magazine by means of the tool changing device.

[0069] Optionally, the wear of the machining tool can be determined beforehand using a measuring device.

[0070] When the gripping devices are now moved to the tool magazine, the first gripping unit is free, and the last-used machining tool is held in the second gripping unit. The gripping devices are moved to a storage level in such a way that the last-used machining tool can be deposited in a free tool receiving location, and at the same time, a new machining tool intended for the next machining operation can be received in a tool receiving location spaced at the gripping unit distance. The second gripping unit is opened to deposit the machining tool held therein, and the first gripping unit is closed to receive the new machining tool. The gripping device can then be moved back to the work spindles to insert the new machining tool. The depositing of the machining tools and the adjustment of the longitudinal extent of the individual tool receiving locations can be carried out based on the calculations of the digital computer.

[0071] The insertion of the new machining tool occurs analogously to the process steps already described, whereby now not the second gripping unit but the first gripping unit serves to hold the machining tool already held in the work spindle.

[0072] It is thus provided that in every second process pass, the first gripping unit serves to receive the machining tool clamped in the work spindle and in every second machining operation, the second gripping unit serves to receive the machining tool clamped in the work spindle.

[0073] In addition, the gripping devices can be used to re-sort the machining tools in the tool magazine during longer machining operations.

[0074] Furthermore, it can be provided that a machine tool is designed as follows. The machine tool comprises:

- a machine frame;

- a first work spindle which is rotatably mounted about a first spindle axis, wherein the first spindle axis is arranged parallel to a horizontal Z-axis;

- a second work spindle which is rotatably mounted about a second spindle axis, wherein the second spindle axis is arranged parallel to the horizontal Z-axis, wherein the first work spindle and the second work spindle are arranged next to one another at a distance from one another in a horizontal X-axis;

- a workpiece clamping device with a first workpiece receiving location, which is designed to receive at least one first workpiece, the first work spindle is displaceable along the X-axis by means of a first X-axis adjustment unit and the second work spindle is displaceable along the X-axis by means of a second X-axis adjustment unit, wherein the first work spindle and the second work spindle are displaceable independently of one another along the X-axis and

wherein the first work spindle is displaceable along the Z-axis by means of a first Z-axis adjustment unit and the second work spindle is displaceable along the Z-axis by means of a second Z-axis adjustment unit, wherein the first work spindle and the second work spindle are displaceable independently of one another along the Z-axis and

wherein the first workpiece receiving location is adjusted by means of a Y-axis adjustment unit along a

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vertical Y-axis can be moved.

[0075] The machine tool has the surprising advantage that, despite increasing the flexibility of the machine tool, the number of necessary drives can be kept as low as possible and thus the complexity of the machine tool can be kept to a minimum.

[0076] In particular, it can be provided that the first work spindle and the second work spindle are not displaceable along a vertical Y-axis. This is not necessary, since the first workpiece receiving location can be displaced along a vertical Y-axis by means of a Y-axis adjustment unit. This can achieve a surprising improvement in machining accuracy compared to a concept in which the first work spindle and the second work spindle are displaceable along a vertical Y-axis.

[0077] Furthermore, it may be expedient if the first work spindle is displaceable along the X-axis exclusively by means of the first X-axis adjustment unit, and the second work spindle is displaceable along the X-axis exclusively by means of a second X-axis adjustment unit. This has the advantage that additional drives can be eliminated by this measure. In particular, it can be provided that the first work spindle or the second work spindle can each be displaced over their entire intended working range by means of the respective X-axis adjustment unit. This offers significant advantages over possible designs in which the first work spindle and the second work spindle are displaced together by means of an X-axis adjustment unit, and additional X-axis adjustment units are required between the first work spindle and the second work spindle to compensate for any expansion or for other compensation.

[0078] Furthermore, it can be provided that the workpiece clamping device comprises a second workpiece receiving location which is designed to receive a second workpiece, wherein the first workpiece receiving location and the second workpiece receiving location are jointly displaceable along the vertical Y-axis by means of a Y-axis adjustment unit. This has the advantage that a second workpiece can be received on the workpiece clamping device, wherein the first workpiece and the second workpiece can be machined parallel to one another or simultaneously with one another. In particular, this measure can increase the efficiency of the machine tool and, at the same time, keep the complexity of the machine tool or the complexity requirements for the control of the machine tool low.

[0079] Furthermore, it can be provided that the workpiece clamping device comprises a third workpiece receiving location which is designed to receive a third workpiece, wherein the first workpiece receiving location, the second workpiece receiving location, the third workpiece receiving location and the fourth workpiece receiving location are jointly displaceable along the vertical Y-axis by means of a Y-axis adjustment unit. This has the advantage that a third workpiece and a fourth workpiece can be received on the workpiece clamping device, wherein the first workpiece, the second workpiece, the third workpiece and the fourth workpiece can be machined parallel to one another or simultaneously with one another. In particular, this measure can increase the efficiency of the machine tool and, at the same time, minimize the complexity of the machine tool and the complexity requirements for the control of the machine tool.

[0080] In particular, it can be provided that each of the work spindles is assigned its own workpiece receiving location.

[0081] Furthermore, it can be provided that the first workpiece receiving location is arranged on a workpiece table which is pivotally mounted about a pivot axis, wherein the pivot axis is aligned parallel to a horizontal X-axis, wherein the workpiece table is displaceable along a vertical Y-axis by means of the Y-axis adjustment unit. This has the advantage that this measure can increase the flexibility of the machine tool without excessively increasing its complexity.

[0082] Furthermore, the additional workpiece receiving locations can also be arranged on the workpiece table.

[0083] Furthermore, it can be provided that at least one swivel motor is formed, by means of which the workpiece table can be swiveled about the first swivel axis.

[0084] Another advantageous embodiment is one in which the first workpiece receiving location and the second workpiece receiving location are arranged on the workpiece table. This has the advantage that this measure can increase the flexibility of the machine tool without excessively increasing its complexity.

[0085] Furthermore, it can be provided that the first workpiece receiving location, the second workpiece receiving location, the third workpiece receiving location, and the fourth workpiece receiving location are arranged on the workpiece table. This has the advantage that this measure can increase the flexibility of the machine tool without excessively increasing its complexity. Furthermore, this measure allows the machining space to be utilized as effectively as possible.

[0086] According to a further development, it is possible to form a third work spindle which is mounted for rotation about a third spindle axis, wherein the third spindle axis is arranged parallel to the horizontal Z-axis and wherein the third work spindle is arranged next to the first work spindle, and to form a fourth work spindle which is mounted for rotation about a fourth spindle axis, wherein the fourth spindle axis is arranged parallel to the horizontal Z-axis and wherein the fourth work spindle is arranged next to the second work spindle. This has the advantage that this measure can, on the one hand, increase the flexibility of the machine tool and, on the other hand, simultaneously increase the efficiency of the machine tool.

[0087] Furthermore, it can be provided that the first work spindle is assigned to the first workpiece receiving location on the workpiece table, that the second work spindle is assigned to the second workpiece receiving location on the workpiece table, that the third work spindle is assigned to the third workpiece receiving location on the workpiece table and that the fourth work spindle is assigned to the fourth workpiece receiving location on the workpiece table.

[0088] Furthermore, it can be provided that the first work spindle is coupled to a first spindle drive for rotating the work spindle about the first spindle axis. In particular, it can be provided that the first spindle drive is designed as a motor spindle.

[0089] Furthermore, it can be provided that the second work spindle is coupled to a second spindle drive for rotating the work spindle about the second spindle axis. In particular, it can be provided that the second spindle drive is designed as a motor spindle.

[0090] Furthermore, it can be provided that the third work spindle is coupled to a third spindle drive for rotating the work spindle about the third spindle axis. In particular, it can be provided that the third spindle drive is designed as a motor spindle.

[0091] Furthermore, it can be provided that the fourth work spindle is coupled to a fourth spindle drive for rotating the work spindle about the fourth spindle axis. In particular, it can be provided that the fourth spindle drive is designed as a motor spindle.

[0092] Furthermore, it can be provided that the individual work spindles can be driven individually and independently of one another.

[0093] Furthermore, it may be expedient for the first work spindle and the third work spindle to be jointly displaceable along the X-axis by means of the first X-axis adjustment unit, and for the second work spindle and the fourth work spindle to be jointly displaceable along the X-axis by means of the second X-axis adjustment unit. This has the advantage that, while maintaining high flexibility of the machine tool, the complexity of the machine tool can be kept low.

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[0094] Furthermore, it can be provided that the third work spindle is displaceable along the X-axis relative to the first work spindle by means of a first X-axis compensation unit, and that the fourth work spindle is displaceable along the X-axis relative to the second work spindle by means of a second X-axis compensation unit. This has the advantage that the flexibility of the machine tool can be further increased. At the same time, it is not necessary for the third work spindle and the fourth work spindle to be displaceable separately over the entire operating range of the X-axis. This is particularly advantageous if the first work spindle and the third work spindle are assigned to the first workpiece receiving location and the second work spindle and the fourth work spindle are assigned to the second workpiece receiving location.

[0095] In an alternative embodiment, it can be provided that the first work spindle is displaceable along the X-axis by means of the first X-axis adjustment unit, and the third work spindle is displaceable along the X-axis by means of a third X-axis adjustment unit, and the second work spindle is displaceable along the X-axis by means of the second X-axis adjustment unit, and the fourth work spindle is displaceable along the X-axis by means of a fourth X-axis adjustment unit, wherein the first work spindle, the second work spindle, the third work spindle, and the fourth work spindle are displaceable along the X-axis independently of one another. This measure can further increase the flexibility of the machine tool.

[0096] Furthermore, it can be provided that the third work spindle is displaceable along the Z-axis by means of a third Z-axis adjustment unit, and the fourth work spindle is displaceable along the Z-axis by means of a fourth Z-axis adjustment unit, wherein the first work spindle, the second work spindle, the third work spindle, and the fourth work spindle are displaceable independently of one another along the Z-axis. This measure can further increase the flexibility of the machine tool.

[0097] Furthermore, it can be provided that the first Z-axis adjustment unit is mounted on the first Z-axis adjustment unit by means of a first Z-axis guide.

[0098] Furthermore, it can be provided that the second Z-axis adjustment unit is mounted on the second X-axis adjustment unit by means of a second Z-axis guide. Furthermore, it can be provided that the third Z-axis adjustment unit is mounted on the first X-axis adjustment unit by means of a third Z-axis guide. Furthermore, it can be provided that the fourth Z-axis adjustment unit is mounted on the second X-axis adjustment unit by means of a fourth Z-axis guide.

[0099] Furthermore, it can be provided that the first Z-axis adjustment unit is adjustable relative to the first X-axis adjustment unit by means of a first Z-axis drive unit. Furthermore, it can be provided that the second Z-axis adjustment unit is adjustable relative to the second X-axis adjustment unit by means of a second Z-axis drive unit. Furthermore, it can be provided that the third Z-axis adjustment unit is adjustable relative to the first X-axis adjustment unit or to the third X-axis adjustment unit by means of a third Z-axis drive unit. Furthermore, it can be provided that the fourth Z-axis adjustment unit is adjustable relative to the second X-axis adjustment unit or to the fourth X-axis adjustment unit by means of a fourth Z-axis drive unit. In particular, it can be provided that the individual work spindles can be displaced individually and independently of one another along the Z-axis by means of the individual Z-axis drive units.

[00100] Furthermore, it can be provided that the individual work spindles can be pivoted individually and independently of one another about the Y-axis by means of a pivot bearing. This can further increase the flexibility of the machine tool.

[00101] The individual Z-axis guides may each have guide rails which are arranged on the respective X-axis adjustment unit and may have guide carriages which are each arranged on the Z-axis adjustment unit.

[00102] Furthermore, it can be provided that a first X-axis

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guide rail and a second X-axis guide rail are formed, wherein the first X-axis guide rail and the second X-axis guide rail are received on the machine frame at a distance from one another in the Z-axis, wherein the first X-axis adjustment unit is displaceably mounted on the first X-axis guide rail by means of at least one first guide carriage and is displaceably mounted on the second X-axis guide rail by means of at least one further first guide carriage, and wherein the second X-axis adjustment unit is mounted on the first X-axis guide rail by means of at least one second guide carriage and is displaceably mounted on the second X-axis guide rail by means of at least one further second guide carriage. This has the advantage that this measure makes it possible to achieve a simple and stable construction of the machine tool, as a result of which the machine tool can have a high machining accuracy.

[00103] Also advantageous is an embodiment according to which it can be provided that the third X-axis adjustment unit is displaceably mounted on the first X-axis guide rail by means of at least one third guide carriage and is displaceably mounted on the second X-axis guide rail by means of at least one further third guide carriage, and that the fourth X-axis adjustment unit is displaceably mounted on the first X-axis guide rail by means of at least one fourth guide carriage and is displaceably mounted on the second X-axis guide rail by means of at least one further fourth guide carriage. This measure can further increase the flexibility of the machine tool. Further third guide carriages are understood to mean additional guide carriages of the third X-axis adjustment unit. For simplicity, the number preceding the guide carriages indicates the assignment to the respective X-axis adjustment units.

[00104] Furthermore, it can be provided that the individual X-axis adjustment units are each coupled to four guide carriages, wherein two of the guide carriages of the respective X-axis adjustment unit are displaceably mounted on the first X-axis guide rail and two of the guide carriages of the respective X-axis adjustment unit are displaceably mounted on the second X-axis guide rail.

[00105] According to a further development, it is possible for a third X-axis guide rail and a fourth X-axis guide rail to be formed on the machine frame, wherein the first X-axis guide rail, the second X-axis guide rail, the third X-axis guide rail and the fourth X-axis guide rail are each accommodated on the machine frame at a distance from one another in the Z-axis

wherein the third X-axis adjustment unit is displaceably mounted on the third X-axis guide rail by means of at least one third guide carriage and is displaceably mounted on the fourth X-axis guide rail by means of at least one further third guide carriage

and that the fourth X-axis adjustment unit is displaceably mounted on the third X-axis guide rail by means of at least one fourth guide carriage and is displaceably mounted on the fourth X-axis guide rail by means of at least one further fourth guide carriage. This has the advantage that this measure allows the individual work spindles to be moved closer to one another, thereby further increasing the possible machining range of the individual work spindles.

[00106] Furthermore, it may be expedient for the workpiece table to be rotatably mounted on the machine frame by means of a first pivot bearing and a second pivot bearing, wherein the Y-axis adjustment unit has a first mount guided on at least one first Y-axis guide rail and a second mount guided on at least one second Y-axis guide rail, wherein the first pivot bearing is arranged on the first mount and the second pivot bearing is received on the second mount. This measure allows the necessary mobility of the tool table with regard to its pivotability and its adjustability in the direction of the Y-axis to be easily realized.

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[00107] Furthermore, it can be provided that the first Y-axis guide rail is arranged on the machine frame. Furthermore, it can be provided that the second Y-axis guide rail is arranged on the machine frame. Furthermore, it can be provided that first receiving guide carriages are arranged on the first receptacle, which interact with the first Y-axis guide rail. Furthermore, it can be provided that second receiving guide carriages are arranged on the second receptacle, which interact with a second Y-axis guide rail.

[00108] Furthermore, it can be provided that the first holder is displaceable along the vertical Y-axis by means of a first Y-drive motor and that the second holder is displaceable along the vertical Y-axis by means of a second Y-drive motor. This has the advantage that this measure allows the workpiece table to be easily displaced. In particular, it can be provided that the first Y-drive motor and the second Y-drive motor are electrically synchronized with one another. In particular, it can be provided that the first Y-drive motor and the second Y-drive motor are controlled synchronously with one another. Synchronization of the first Y-drive motor and the second Y-drive motor can be achieved, for example, by designing a separate path measuring system for the first holder and for the second holder to determine the current position of the first holder and the second holder in the Y direction.

[00109] Furthermore, it can be provided that the first Y-drive motor is coupled to a first ball screw and that a first spindle nut is arranged in the first receptacle.

[00110] Furthermore, it can be provided that the second Y-drive motor is coupled to a second ball screw and that a second spindle nut is arranged in the second receptacle.

[00111] Furthermore, it may be expedient for the first work spindle and the third work spindle to be assigned to the first workpiece holding location, and for the second work spindle and the fourth work spindle to be assigned to the second workpiece holding location. This has the advantage that this measure allows for efficient machining of two workpieces. Such a configuration is useful in conjunction with four work spindles and two workpiece holding locations.

[00112] Furthermore, it can be provided that the first workpiece receiving station comprises a first rotary table, by means of which the first workpiece is rotatably mounted about a first axis of rotation arranged perpendicular to the pivot axis of the workpiece table, and that the second workpiece receiving station comprises a second rotary table, by means of which the second workpiece is rotatably mounted about a second axis of rotation arranged perpendicular to the pivot axis of the workpiece table. This has the advantage that the flexibility of the machine tool can be further improved by this measure.

[00113] Furthermore, it can be provided that the first axis of rotation and the second axis of rotation are arranged parallel to each other.

[00114] Furthermore, it can be provided that two of the first work spindles are arranged one above the other on the first Z-axis adjustment unit, and that two of the second work spindles are arranged one above the other on the second Z-axis adjustment unit. This has the advantage that this measure can increase the efficiency of the machine tool. In particular, it can be provided that the two first work spindles arranged one above the other are positioned at a fixed distance from one another.

[00115] Furthermore, it can be provided that the third workpiece receiving station comprises a third rotary table, by means of which the third workpiece is mounted rotatably about a third axis of rotation arranged normal to the pivot axis of the workpiece table, and that the fourth workpiece receiving station comprises a fourth rotary table, by means of which the fourth workpiece is rotatable about a fourth axis of rotation arranged normal to the pivot axis of the workpiece table.

This has the advantage that the flexibility of the machine tool can be further improved.

[00116] For a better understanding of the invention, it is explained in more detail with reference to the following figures.

[00117] They show in a highly simplified, schematic representation:

[00118] Fig. 1 shows a first embodiment of a machine tool in a first perspective view;

[00119] Fig. 2 shows the first embodiment of the machine tool in a front view;

[00120] Fig. 3 shows the first embodiment of the machine tool in a second perspective view;

[00121] Fig. 4 shows a detail of the four working spindles of the first embodiment of the machine tool in a first perspective view;

[00122] Fig. 5 shows a detail of the four working spindles of the first embodiment of the machine tool in a first perspective view;

[00123] Fig. 6 shows a detail of a tool changing device and a tool magazine of the first embodiment of the machine tool in a first perspective view;

[00124] Fig. 7 shows a detail of the tool changing device of the first embodiment of the machine tool in a first perspective view;

[00125] Fig. 8 shows a second embodiment of a machine tool in a first perspective view;

[00126] Fig. 9 shows a detail of the four working spindles of a third embodiment of the machine tool in a first perspective view;

[00127] Fig. 10 shows a detail of the four X-axis adjustment units of a fourth embodiment of the machine tool in a plan view;

[00128] Fig. 11 shows a detail of the four X-axis adjustment units of a fifth embodiment of the machine tool in a plan view;

[00129] Fig. 12 shows a detail of another embodiment of a receiving comb in a first perspective view;

[00130] Fig. 13 is a schematic side view of a sixth embodiment of a machine tool;

[00131] Fig. 14 shows a third embodiment of a machine tool in a first perspective view.

[00132] By way of introduction, it should be noted that in the variously described embodiments, identical parts are provided with identical reference numerals or identical component designations, whereby the disclosures contained in the entire description can be applied mutatis mutandis to identical parts with identical reference numerals or identical component designations. Furthermore, the positional information chosen in the description, such as top, bottom, side, etc., refers to the directly described and illustrated figure, and these positional information must be applied mutatis mutandis to the new position in the event of a change in position.

[00133] Figures 1 to 7 show schematic representations of a first embodiment of a machine tool 1 for machining workpieces 2, 3 in various views. The machine tool 1 is described using a synopsis of Figures 1 to 7. It should be noted that, for the sake of clarity, not all reference symbols of the described components are shown in each of the figures.

[00134] In particular, it can be provided that the machine tool 1 serves for the machining of a first workpiece 2 and a second workpiece 3.

[00135] The machine tool 1 has a machine frame 4, which serves as a base for the components attached thereto.

[00136] The machine frame 4 is shown only schematically in Fig. 1 for the sake of clarity. However, it should be noted that the machine frame 4 can be anchored at the installation site. Furthermore, the machine frame 4 can, of course, serve to accommodate all components of the machine tool 1. The machine frame 4 itself can also comprise multiple components.

[00137] Furthermore, it can be provided that the machine tool 1 comprises a first work spindle 5 and a second work spindle 6. The first work spindle 5 can be rotatably mounted about a first spindle axis 7. The second work spindle 6 can be rotatably mounted about a second spindle axis 8.

[00138] Furthermore, it can be provided that the first work spindle 5 and the second work spindle 6 are individually and independently mounted on the machine frame 4 so as to be adjustable relative to the machine frame 4 along a Z-axis 9 and an X-axis 10. Furthermore, it can be provided that the first work spindle 5 and the second work spindle 6 are positioned at a fixed height relative to the machine frame 4 along a Y-axis 11 arranged at a right angle to the Z-axis 9 and X-axis 10.

[00139] In particular, it can be provided that the Z-axis 9 is arranged horizontally. The Z-axis 9 can be arranged parallel to the first spindle axis 7 and the second spindle axis 8. Furthermore, it can be provided that the X-axis 10 is also arranged horizontally. The X-axis 10 can be arranged at a right angle to the Z-axis 9. Furthermore, it can be provided that the Y-axis 11 is aligned vertically.

[00140] As further apparent from Fig. 1, it may be provided that a third work spindle 12 is formed, which is arranged to rotate about a third spindle axis 13. Furthermore, it may be provided that a fourth work spindle 14 is formed, which is arranged to rotate about a fourth spindle axis 15.

[00141] Furthermore, it can be provided that the individual work spindles 5, 6, 12, 14 each serve to receive a machining tool 16 by means of which the workpieces 2, 3 can be machined.

[00142] Furthermore, it can be provided that the first work spindle 5 is designed to be displaceable along the X-axis 10 by means of a first X-axis adjustment unit 17. Furthermore, it can be provided that the second work spindle 6 is designed to be displaceable along the X-axis 10 by means of a second X-axis adjustment unit 18. In particular, it can be provided that the first X-axis adjustment unit 17 and the second X-axis adjustment unit 18 are displaceable independently of one another along the X-axis 10.

[00143] As can be seen particularly well from Fig. 4, it can be provided that a first X-axis guide rail 19 and a second X-axis guide rail 20 are formed, which are arranged on the machine frame 4.

[00144] Furthermore, it can be provided that a plurality of first guide carriages 21 are arranged on the first X-axis adjustment unit 17. Individual ones of the first guide carriages 21 can be guided on the first X-axis guide rail 19, and individual ones of the first guide carriages 21 can be guided on the second X-axis guide rail 20.

[00145] In particular, in Fig. 5, it can be provided that two of the first guide carriages 21 are formed which cooperate with the first X-axis guide rail 19 and two of the first guide carriages 21 are formed which cooperate with the second X-axis guide rail 20.

[00146] Furthermore, it can be provided that on the second X-axis adjustment unit 18 several

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several second guide carriages 22 are arranged. Individual ones of the second guide carriages 22 can be guided on the first X-axis guide rail 19, and individual ones of the second guide carriages 22 can be guided on the second X-axis guide rail 20.

[00147] In particular, it can be provided that two of the second guide carriages 22 are formed which cooperate with the first X-axis guide rail 19 and two of the second guide carriages 22 are formed which cooperate with the second X-axis guide rail 20.

[00148] As can be seen from the individual figures, it can be provided that in this first embodiment of the machine tool 1 the first work spindle 5 and the third work spindle 12 are arranged together on the first X-axis adjustment unit 17 and are thus adjustable together along the X-axis 10.

[00149] Furthermore, it can be provided that the second work spindle 6 and the fourth work spindle 14 are arranged together on the second X-axis adjustment unit 18 and are thus displaceable together along the X-axis 10.

[00150] As can be seen particularly well in Fig. 5, it can be provided that the first X-axis adjustment unit 17 is coupled to a first X-axis drive unit 23. Furthermore, it can be provided that the second X-axis adjustment unit 18 is coupled to a second X-axis drive unit 24. The first X-axis drive unit 23 and the second X-axis drive unit 24 can serve to displace or position the first X-axis adjustment unit 17 and the second X-axis adjustment unit 18 along the X-axis 10. Thus, the first X-axis adjustment unit 17 and the second X-axis adjustment unit 18 can be displaced individually and independently of one another along the X-axis 10.

[00151] As can be seen particularly well in Fig. 4, it can be provided that the first work spindle 5 is mounted on the first X-axis adjustment unit 17 by means of a first Z-axis adjustment unit 25 so as to be displaceable in the Z-axis 9. Furthermore, it can be provided that the second work spindle 6 is mounted on the second X-axis adjustment unit 18 so as to be displaceable in the direction of the Z-axis 9 by means of a second Z-axis adjustment unit 26.

[00152] Furthermore, it can be provided that the third work spindle 12 is slidably mounted on the first X-axis adjustment unit 17 by means of a third Z-axis adjustment unit 27. Furthermore, it can be provided that the fourth spindle 14 is slidably mounted on the second X-axis adjustment unit 18 by means of a fourth Z-axis adjustment unit 28 along the Z-axis 9.

[00153] Furthermore, it can be provided that the first Z-axis adjustment unit 25 is mounted on the first Z-axis adjustment unit 17 by means of a first Z-axis guide 29. Furthermore, it can be provided that the second Z-axis adjustment unit 26 is mounted on the second X-axis adjustment unit 18 by means of a second Z-axis guide 30. Furthermore, it can be provided that the third Z-axis adjustment unit 27 is mounted on the first X-axis adjustment unit 17 by means of a third Z-axis guide 31. Furthermore, it can be provided that the fourth Z-axis adjustment unit 28 is mounted on the second X-axis adjustment unit 18 by means of a fourth Z-axis guide 32.

[00154] The individual Z-axis guides 29, 30, 31, 32 can each have guide rails which are arranged on the first X-axis adjustment unit 17 or on the second X-axis adjustment unit 18 and can have guide carriages which are each arranged on the Z-axis adjustment unit 25, 26, 27, 28.

[00155] Furthermore, it can be provided that the first Z-axis adjustment unit 25 is adjustable relative to the first X-axis adjustment unit 17 by means of a first Z-axis drive unit 33. Furthermore, it can be provided that the second Z-axis adjustment unit 26 is adjustable relative to the second X-axis adjustment unit 18 by means of a second Z-axis drive unit 34. Furthermore, it can be provided that the third Z-axis adjustment unit 27 is adjustable relative to the first X-axis adjustment unit 17 by means of a third Z-axis drive unit 35. Furthermore, it can be provided that the fourth Z-axis adjustment unit 28 is adjustable by means of a fourth Z-axis

Drive unit 36 is adjustable relative to the second X-axis adjustment unit 18. In particular, it can be provided that the individual work spindles 5, 6, 12, 14 can be displaced individually and independently of one another along the Z-axis 9 by means of the individual Z-axis drive units 33, 34, 35, 36.

[00156] Furthermore, it can be provided that the individual work spindles 5, 6, 12, 14 can be designed to be pivotable individually and independently of one another about the Y-axis 11 by means of a pivot bearing 37. This can further increase the flexibility of the machine tool 1.

[00157] As can be seen from the individual Figs. 1 to 5, it can be provided that in the first embodiment of the machine tool 1, the individual work spindles 5, 6, 12, 14 are not displaceable along the Y-axis 11. Instead, the individual work spindles 5, 6, 12, 14 can all be arranged at a common height.

[00158] As can be seen particularly clearly from Fig. 1, it can further be provided that a workpiece clamping device 38 is formed, which serves to receive the first workpiece 2 and the second workpiece 3.

[00159] The workpiece clamping device 38 may have a workpiece table 39. The workpiece table 39 may have a first workpiece receiving location 59 and a second workpiece receiving location 60.

[00160] Furthermore, it can be provided that a Y-axis adjustment unit 58 is formed, by means of which the workpiece table 39 can be displaced along the Y-axis 11.

[00161] The workpiece table 39 can be pivotally mounted about a first pivot axis 40 relative to the machine frame 4. In particular, it can be provided that the first pivot axis 40 is arranged parallel to the X-axis 10.

[00162] Furthermore, it can be provided that a first pivot bearing 41 and a second pivot bearing 42 are formed, by means of which the workpiece table 39 is pivotably mounted on the machine frame 4 about the first pivot axis 40.

[00163] Furthermore, it can be provided that the first pivot bearing 41 is coupled to a first receptacle 43, wherein the first receptacle 43 can be slidably received on the machine frame 4 along the Y-axis 11. Furthermore, it can be provided that the second pivot bearing 42 is coupled to a second receptacle 44, wherein the second receptacle 44 can be slidably received on the machine frame 4 along the Y-axis 11. In particular, it can be provided that first receptacle guide carriages 45 are arranged on the first receptacle 43, which cooperate with a first Y-axis guide rail 46.

[00164] The first Y-axis guide rail 46 can be arranged on the machine frame 4. Furthermore, it can be provided that second holder guide carriages 47 are arranged on the second holder 44, which second holder guide carriages interact with a second Y-axis guide rail 48. The second Y-axis guide rail 48 can be arranged on the machine frame 4. Furthermore, it can be provided that a first Y-drive motor 49 is formed, by means of which the first holder 43 can be displaced along the Y-axis 11. Furthermore, it can be provided that a second Y-drive motor 50 is formed, by means of which the second holder 44 can be displaced along the Y-axis 11. In particular, it can be provided that the first Y-drive motor 49 and the second Y-drive motor 50 are operated synchronously with one another, so that the first pivot axis 40 is always parallel to the X-axis 10.

[00165] Furthermore, it can be provided that at least one pivot motor 51 is formed, by means of which the workpiece table 39 can be pivoted about the first pivot axis 40. The pivot motor 51 can be arranged on one of the two pivot bearings 41, 42. Furthermore, it can also be provided that two of the pivot motors 51 are formed on one of the pivot bearings 41, 42.

[00166] Furthermore, it can also be provided that on each of the pivot bearings 41, 42

because one swivel motor 51 or two of the swivel motors 51 are arranged.

[00167] As schematically shown in Fig. 3, a handling system 99 can be provided, by means of which the individual receiving combs 67, 68, 74, 75, together with the machining tools 16 received therein, can be inserted into the machine tool 1 or removed therefrom. Thus, the tool storage can be expanded by this measure. The handling system 99 can, for example, comprise an automated guided vehicle, by means of which the receiving combs 67, 68, 74, 75 can be transported over long distances within a production hall. Alternatively, it is of course also conceivable for the machining tools 16 to be manipulated directly by means of the handling system 99 or to be received in it.

[00168] Loading the machine tool 1 with receiving combs 67, 68, 74, 75 or machining tools 16 can be done from the rear, as shown in Fig. 3. Furthermore, it is also conceivable for the machine tool 1 to be loaded from the side or from above using the handling system 99.

[00169] Furthermore, it can be provided that the first workpiece receiving location 59 on the workpiece table 39 comprises a first rotary table 52, which can be mounted on the workpiece table 39 so as to be rotatable about a first axis of rotation 53. Furthermore, it can be provided that the second workpiece receiving location 60 on the workpiece table 39 comprises a second rotary table 54, which can be arranged on the workpiece table 39 so as to be rotatable about a second axis of rotation 55. The first rotary table 52 can serve to receive the first workpiece 2. The second rotary table 54 can serve to receive the second workpiece 3. In particular, it can be provided that the first rotary table 52 and the second rotary table 54 are arranged individually and independently of one another on the workpiece table 39 so as to be rotatable about the respective axis of rotation 53, 54. In particular, it can be provided that the first rotary table 52 is driven by a first rotary motor 56. Furthermore, it can be provided that the second rotary table 54 is driven by a second rotary motor 57.

[00170] As can be further seen from Fig. 1, it can be provided that the first work spindle 5 and the third work spindle 12 are assigned to the first rotary table 52 and that the second work spindle 6 and the fourth work spindle 14 are assigned to the second rotary table 54.

[00171] In a further embodiment, not shown, it can also be provided that, in addition to the first rotary table 52 and the second rotary table 54, a third rotary table and a fourth rotary table are formed on the workpiece table 39. Each of the rotary tables can serve to hold a workpiece. Thus, each of the work spindles 5, 6, 12, 14 can be assigned to its own rotary table.

[00172] As can be seen from Fig. 1, a tool changing device 61 may also be provided for changing the machining tools 16. Furthermore, a tool magazine 62 may be provided for receiving and temporarily storing the machining tools 16.

[00173] The tool magazine 62 serves in particular to provide and store different machining tools 16 for different machining operations.

[00174] As can be seen particularly clearly in Fig. 6, a plurality of storage levels 63, each with a plurality of tool receiving locations 64, 65, can be formed in the tool magazine 62. In particular, it can be provided that a storage level 63 is characterized in that all tool receiving locations 64, 65 of a storage level 63 are located at a common height with respect to the Y-axis 11.

[00175] In the embodiment according to Fig. 1, only one memory level 63 is shown for the sake of simplicity.

[00176] As can be seen from Fig. 6, it can be provided that the tool receiving locations 64, 65 are aligned parallel to the horizontal Z-axis 9, wherein the machining tools 16 can be accommodated in the tool magazine 62 aligned parallel to the horizontal Z-axis 9. Furthermore, the individual tool receiving locations 64, 65 in the horizontal X-axis

10 spaced apart from each other.

[00177] As can be seen particularly clearly in Fig. 6, it can be provided that a plurality of tool receiving locations 64, 65 are arranged one behind the other in the tool magazine 62, offset in the Z-axis 9. In particular, it can be provided that the first tool receiving location 64 and the second tool receiving location 65 are arranged at a distance from one another. Furthermore, it can be provided that a plurality of the first tool receiving locations 64 of the horizontal X-axis 10 are arranged next to one another at a distance from one another. Furthermore, it can be provided that a plurality of the second tool receiving locations 65 are arranged next to one another at a distance from one another in the horizontal X-axis 10.

[00178] As can be seen particularly well from Fig. 6, it can be provided that the tool magazine 62 comprises a first receiving comb 67 and a second receiving comb 68.

[00179] The first receiving comb 67 and the second receiving comb 68 can each be designed to receive different processing tools 16. In particular, it can be provided that the first receiving comb 67 has a transverse extension in the X-axis 10. In this case, a plurality of first receiving recesses 69 can be arranged in the first receiving comb 67 at a distance 66 along the X-axis 10. Each of the first receiving recesses 69 can serve to receive one of the processing tools 16. Furthermore, it can be provided that a plurality of second receiving recesses 70 are provided in the second receiving comb 68, wherein the individual second receiving recesses 70 are also received at a distance 66 from one another along the X-axis 10.

[00180] Furthermore, it can be provided that the first receiving comb 67 and the second receiving comb 68 are mounted on the machine tool 1 so as to be displaceable along the Z-axis 9. By this measure, a first longitudinal extent 71 of the first tool receiving location 64 and a second longitudinal extent 72 of the second tool receiving location 65 can be varied or adjusted.

[00181] In particular, this measure makes it possible to adapt the first longitudinal extension 71 of the first tool receiving location 64 to a tool length 73 of the machining tools 16 to be accommodated. Furthermore, this measure makes it possible to adapt the second longitudinal extension 72 of the second tool receiving location 65 to the tool length 73 of the machining tools 16 to be accommodated.

[00182] The adjustment can be made such that the first longitudinal extent 71 of the first tool holder location 64 is adapted to the tool length 73 of the longest of the machining tools 16 to be accommodated. The second longitudinal extent 72 of the second tool holder location 65 can, of course, also be adapted to the tool length 73 of the longest of the machining tools 16 to be accommodated in the second tool holder location 65. The figures show, by way of example, machining tools 16 with the same tool length 73 for each tool holder location 64, 65. Of course, it can be provided that different machining tools 16 with different tool lengths 73 are accommodated side by side for each tool holder location 64, 65.

[00183] Furthermore, it can also be provided that individual machining tools 16 have a tool length 73 that extends over several of the tool receiving locations 64, 65. For example, it can be provided that the first receiving comb 67 and the second receiving comb 68 are designed or arranged such that the first receiving recesses 69 and the second receiving recesses 70 are arranged in alignment one behind the other. A single machining tool 16 with an excessively large tool length 73 can be received in one of the first receiving recesses 69 and extend beyond the corresponding second receiving recess 70. Of course, it must be taken into account that the corresponding second receiving recess 70 remains free of machining tools 16.

[00184] As can be seen from Fig. 6, it can be provided that a third receiving comb 74 is formed next to the first receiving comb 67. The third receiving comb 74 can

be arranged next to the first receiving comb 67 in the extension of the X-axis 10. Furthermore, it can be provided that a fourth receiving comb 75 is formed, wherein the fourth receiving comb 75 can be arranged next to the second receiving comb 68 in the extension of the X-axis 10.

[00185] In particular, it can be provided that the fourth receiving comb 75 is arranged at a distance from the third receiving comb 74 in the Z-axis 9. Furthermore, it can be provided that the third receiving comb 74 has third receiving recesses 76 spaced apart from one another in the X-axis 10 for receiving one of the processing tools 16. Furthermore, it can be provided that the fourth receiving comb 75 has fourth receiving recesses 77. The fourth receiving recesses 77 can also be arranged at a distance from one another in the X-axis 10.

[00186] The third receiving comb 74 and the fourth receiving comb 75 can also be mounted individually and independently of one another on the machine tool 1 so that they can be moved in the Z-axis 9, so that the corresponding longitudinal extent of the tool receiving location can be adapted to the machining tools 16 to be accommodated.

[00187] In particular, it can be provided that the tool changing device 61 or the handling system 99 is used to position the receiving combs 67, 68, 74, 75 in the Z-axis 9.

[00188] As further evident from Fig. 6, it can of course also be provided that, in addition to the first receiving comb 67 and the third receiving comb 74, further receiving combs are provided at a distance in the direction of the X-axis 10. Furthermore, it can also be provided that further receiving combs are provided behind the first receiving comb 67 and the second receiving comb 68. These further receiving combs can, mutatis mutandis to the receiving combs already described, also have receiving recesses and can also be arranged in the tool magazine 62 so as to be displaceable in the Z-axis 9.

[00189] Furthermore, it can be provided that a comb holder 78 is formed in the tool magazine 62, which serves to hold the individual holding combs 67, 68, 74, 75. The comb holder 78 is hidden in Fig. 6 for the sake of clarity.

[00190] As can be seen particularly clearly in Fig. 7, the tool changing device 61 can comprise a first gripping device 79. The first gripping device 79 can have a first gripping unit 80 and a second gripping unit 81. The first gripping unit 80 and the second gripping unit 81 can be arranged at a distance from one another with respect to the X-axis 10 by a first gripping unit distance 82.

[00191] In particular, it can be provided that the first gripping unit distance 82 is equal to the distance 66 of the individual receiving recesses 69, 70 or a multiple of the distance 66 of the individual receiving recesses 69, 70.

[00192] Furthermore, it can be provided that the first gripping device 79 is assigned to the first work spindle 5. In particular, it can be provided that a first of the machining tools 16, which is clamped in the first work spindle 5, can be removed by means of the first gripping unit 80 and then a second of the machining tools 16, received in the second gripping unit 81, is inserted into the first work spindle 5.

[00193] In particular, it can be provided that the first gripping unit 80 and the second gripping unit 81 are aligned such that the machining tools 16 can be received in the respective gripping unit 80, 81 aligned parallel to the Z-axis 9.

[00194] Furthermore, it can be provided that a second gripping device 84 is accommodated on the gripping device carrier 83, which second gripping device has a third gripping unit 85 and a fourth gripping unit 86. The third gripping unit 85 and the fourth gripping unit 86 can be arranged at a distance from one another with respect to the X-axis 10 at a second gripping unit distance 87. The function or the dimensions of the second gripping device 84 can be designed mutatis mutandis to the first gripping device 79. Furthermore, it can be provided that the second gripping

device 84 is assigned to the second work spindle 6.

[00195] Furthermore, it can be provided that the first gripping device 79 and the second gripping device 84 are arranged at a gripping device distance 88 from each other.

[00196] Furthermore, it can be provided that a third gripping device 89 and a fourth gripping device 90 are arranged on the gripping device carrier 83. The third gripping device 89 can be assigned to the third work spindle 12. The fourth gripping device 90 can be assigned to the fourth work spindle 14. The third gripping device 89 and the fourth gripping device 90 can be designed mutatis mutandis to the first gripping device 79 and can also each have two gripping units.

[00197] As further apparent from Fig. 7, it can be provided that the tool changing device 61 has a gripping device head 91. The gripping device carrier 83 can be arranged displaceably along the X-axis 10 on the gripping device head 91. In particular, it can be provided that the gripping device carrier 83 is coupled to a gripping device carrier rail 92, which is displaceably received in a gripping device head slide 93. The gripping device head slide 93 can be arranged on the gripping device head 91. Furthermore, it can be provided that a gripping device carrier adjustment motor 94 is formed, by means of which the gripping device carrier 83 can be displaced relative to the gripping device head 91.

[00198] Furthermore, it can be provided that the gripping device head 91 is arranged on a gripping device height adjustment mount 95 so as to be displaceable in the Y-axis 11. A guide system can also be formed between the gripping device head 91 and the gripping device height adjustment mount 95. Furthermore, it can be provided that a gripping device main support 96 is formed, which extends along the Z-axis 9. In particular, it can be provided that the gripping device height adjustment mount 95 is displaceably received on the gripping device main support 96 in the Z-axis 9. A drive can also be formed for displacing the gripping device height adjustment mount 95 in the Z-axis 9 relative to the gripping device main support 96.

[00199] A guide system can also be formed between the gripping device main carrier 96 and the gripping device height adjustment receptacle 95.

[00200] Furthermore, it can be provided that the gripping device main carrier 96 is received on the machine frame 4 by means of a first holder 97 or by means of a second holder 98.

[00201] As schematically illustrated in Fig. 6, a handling system 99 can be provided, by means of which the individual receiving combs 67, 68, 74, 75, together with the machining tools 16 received therein, can be inserted into or removed from the machine tool 1. Thus, the tool storage can be expanded by this measure.

[00202] Fig. 8 shows a second and possibly independent embodiment of the machine tool 1, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figs. 1 to 7. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 7.

[00203] As can be seen from Fig. 8, it can be provided that no further work spindles are provided besides the first work spindle 5 and the second work spindle 6. The basic structure of the machine tool 1 can be designed according to the first embodiment of the machine tool 1, wherein reference is made at this point to the description of the details of the first embodiment of the machine tool 1.

[00204] In this second embodiment of the machine tool 1, a further difference from the first embodiment of the machine tool 1 may be that the tool changing device 61 only comprises the first gripping device 79 and the second gripping device 84.

summarizes.

[00205] Fig. 9 shows a second and possibly independent embodiment of the machine tool 1, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figs. 1 to 7. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 7.

[00206] For the sake of clarity, only the individual work spindles 5, 6, 12, 14 together with the respective associated X-axis adjustment units 17, 18, 100, 101 are shown in Fig. 9, whereby the remaining structure of the machine tool 1 can be the same as shown and described in the first embodiment.

[00207] As can be seen from Fig. 9, it can be provided that the third work spindle 12 is arranged on a third X-axis adjustment unit 100. Furthermore, it can be provided that the fourth work spindle 14 is arranged on a fourth X-axis adjustment unit 101. In particular, it can be provided that the third X-axis adjustment unit 100 has third guide carriages 102 by means of which the third X-axis adjustment unit 100 is slidably coupled to the first X-axis guide rail 19 and to the second X-axis guide rail 20, respectively.

[00208] Furthermore, it can be provided that the fourth X-axis adjustment unit 101 has fourth guide carriages 103, by means of which the fourth X-axis adjustment unit 101 is displaceably coupled to the first X-axis guide rail 19 or to the second X-axis guide rail 20 in the direction of the X-axis 10.

[00209] In this embodiment, the first work spindle 5, the second work spindle 6, the third work spindle 12, and the fourth work spindle 14 can be displaced individually and independently of one another in the direction of the X-axis 10. Of course, in this third embodiment, each of the X-axis adjustment units 17, 18, 100, 101 can be provided with a separate drive.

[00210] Fig. 10 shows a second and possibly independent embodiment of the machine tool 1, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figs. 1 to 9. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 9.

[00211] For the sake of clarity, only the individual X-axis adjustment units 17, 18, 100, 101 are shown in Fig. 10, whereby the remaining structure of the machine tool 1 can be the same as shown and described in the first embodiment.

[00212] Fig. 10 shows a schematic plan view of a fourth embodiment of a configuration of the X-axis adjustment units 17, 18, 100, 101.

[00213] As can be seen from Fig. 10, it can be provided that a third X-axis guide rail 104 and a fourth X-axis guide rail 105 are formed. The third X-axis guide rail 104 and the fourth X-axis guide rail 105 can be arranged parallel to the first X-axis guide rail 19 and the second X-axis guide rail 20. Furthermore, it can be provided that the first guide carriages 21 of the first X-axis adjustment unit 17 and the third guide carriages 102 of the third X-axis adjustment unit 100 are offset from one another in accordance with the offset of the X-axis guide rails with respect to the Z-axis 9. The third guide carriages 102 can be slidably received on the third X-axis guide rail 104 and the fourth X-axis guide rail 105, respectively. The fourth guide carriages 103 of the fourth X-axis adjustment unit 101 can be slidably mounted on the third X-axis guide rail 104 or on the fourth X-axis guide rail 105. By offsetting the first guide carriage 21 and the third guide carriage 102 or the second guide carriage 22 and the fourth guide carriage 103 relative to one another, it can be achieved that the guide carriages are arranged at a large distance from one another on the X-axis adjustment unit 17, 18, 100, 101.

and yet the individual X-axis adjustment units 17, 18, 100, 101 can be moved close to one another, since, as can be seen from Fig. 10, the individual guide carriages can be displaced relative to one another in an overlapping manner with respect to the X-axis 10 due to the offset in the direction of the Z-axis 9. Thus, with simultaneous high rigidity and stability of the individual X-axis adjustment units 17, 18, 100, 101, maximum flexibility of the machine tool 1 can be achieved, since the individual work spindles 5, 6, 12, 14 can be moved as close to one another as possible.

[00214] Also in this embodiment, the X-axis adjustment units 17, 18, 100, 101 can be moved individually and independently of each other along the X-axis 10.

[00215] This embodiment can also be combined with the embodiment described below according to Fig. 11.

[00216] Fig. 11 shows a second and possibly independent embodiment of the machine tool 1, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figs. 1 to 10. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 10.

[00217] In Fig. 11, for the sake of clarity, only the individual work spindles 5, 6, 12, 14 together with the respective associated X-axis adjustment units 17, 18, 100, 101 are shown in a simplified manner, whereby the remaining structure of the machine tool 1 can be the same as shown and described in the first embodiment.

[00218] As can be seen from Fig. 11, it can be provided that the third X-axis adjustment unit 100 is coupled to the first X-axis adjustment unit 17 by means of a first X-axis compensation unit 106. The third X-axis adjustment unit 100 can therefore not be adjustable in the direction of the X-axis 10 completely independently of the first X-axis adjustment unit 17, but rather depend on it.

[00219] Furthermore, it can be provided that the fourth X-axis adjustment unit 101 is coupled to the second X-axis adjustment unit 18 by means of a second X-axis compensation unit 107. The third X-axis adjustment unit 100 can thus be displaceable relative to the first X-axis adjustment unit 17. The fourth X-axis adjustment unit 101 can thus be displaceable relative to the second X-axis adjustment unit 18.

[00220] In Fig. 12, a second and possibly independent embodiment of the receiving comb is shown, wherein again the same reference numerals or component designations are used for the same parts as in the preceding Figs. 1 to 11. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 11.

[00221] The receiving comb shown in Fig. 12 can be combined with all other embodiments of the machine tool 1.

[00222] As can be seen from Fig. 12, the first receiving comb 67 can be provided with first lower receiving recesses 108 opposite the first receiving recesses 69, which can also serve to receive processing tools 16. Furthermore, the first receiving comb 67 can be provided with a locking device 110, by means of which the processing tools 16 can be secured in the first receiving comb 67. This measure can prevent the lower processing tools 16 from falling out. Locking the processing tools 16 can also be necessary when manipulating the receiving comb 67, 68 with the handling system 99.

[00223] Furthermore, it can be provided that the first receiving comb 67 is pivotally mounted about a horizontal axis 111 by 180°, so that either the first receiving troughs 69 or the first lower receiving troughs 108 can be brought to the top of the first receiving chamber 67 in order to be able to exchange the processing tools 16.

[00224] In particular, the horizontal axis 111 can be arranged parallel to the Z-axis 9.

[00225] Mutatis mutandis, it can be provided that the second receiving comb 68 has second lower receiving recesses 109.

[00226] Fig. 13 shows a second and possibly independent embodiment of the machine tool 1, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figs. 1 to 7. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 7.

[00227] Fig. 13 shows a further embodiment of the machine tool 1 in a schematic cut-away side view.

[00228] As can be seen from Fig. 13, it can be provided that the first receiving comb 67 or the comb receptacle 78 form part of the housing 112 of the machine tool 1 and the machining tools 16, which are received in the first receiving comb 67, are thus arranged outside the housing 112. In particular, it can be provided that an opening 113 is formed in the housing 112 of the machine tool 1, which opening can be closed by the comb receptacle 78.

[00229] By means of the first gripping unit 80, the machining tool 16 received in the first receiving comb 67 can be gripped and moved upwards along the Y-axis 11. Subsequently, the first receiving comb 67, together with the comb holder 78, can be moved sideways along the Z-axis 9 to release the opening 113 in the housing 112, which is closed by the comb holder 78.

[00230] Subsequently, the machining tool 16 held in the first gripping unit 80 can be moved downward along the Y-axis 11 and picked up by the first work spindle 5. In this case, the first work spindle 5 can be moved along the Z-axis 9. Thus, with such a configuration, it is not necessary for the first gripping unit 80 to be designed to be movable along the Z-axis 9.

[00231] Fig. 14 shows a second and possibly independent embodiment of the machine tool 1, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figs. 1 to 13. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 13.

[00232] As can be seen from Fig. 14, it can be provided that the first work spindle 5 is assigned to the first rotary table 52 and that the second work spindle 6 is assigned to the second rotary table 54 and that the third work spindle 12 is assigned to a third rotary table 114 and that the fourth work spindle 14 is assigned to a fourth rotary table 115.

[00233] The embodiments show possible embodiments, it being noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather various combinations of the individual embodiments with each other are also possible and this variation possibility lies in the skill of the person skilled in the art in this technical field due to the teaching of technical action by means of the objective invention.

[00234] The scope of protection is determined by the claims. However, the description and the drawings must be considered for the interpretation of the claims. Individual features or combinations of features from the various embodiments shown and described may represent independent inventive solutions. The problem underlying the independent inventive solutions can be derived from the description.

[00235] All information on value ranges in this description is to be understood as including any and all sub-ranges thereof, e.g. the information 1 to 10 is to be understood as including all sub-ranges, starting from the lower limit 1 and

N Bes AT 527 080 B1 2025-06-15

8 m above sea level

the upper limit 10 is included, i.e. all sub-ranges begin with a lower limit of 1 or greater and end with an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

[00236] For the sake of clarity, it should finally be pointed out that, in order to better understand the structure, some elements have been shown not to scale and/or enlarged and/or reduced.

LIST OF REFERENCE SYMBOLS

1 Machine tool 26 Second Z-axis adjustment unit 2 First workpiece unit 3 Second workpiece 27 Third Z-axis adjustment unit 4 Machine frame 28 Fourth Z-axis adjustment unit 5 First work spindle unit 6 Second work spindle 29 First Z-axis guide 7 First spindle axis 30 Second Z-axis guide 8 Second spindle axis 31 Third Z-axis guide 9 Z-axis 32 Fourth Z-axis guide 10 X-axis 33 First Z-axis drive unit 11 Y-axis unit 12 Third work spindle 34 Second Z-axis drive unit 13 Third spindle axis unit 14 Fourth work spindle 35 Third Z-axis drive unit 15 Fourth spindle axis unit 16 Machining tool 36 Fourth Z-axis drive unit 17 First X-axis adjustment unit 18 Second X-axis adjustment unit 37 Swivel bearing Work spindle unit 19 First X-axis guide rail 38 Workpiece clamping device 39 Workpiece table 20 Second X-axis guide rail 40 First swivel axis 41 First swivel bearing 21 First guide carriage 42 Second swivel bearing 22 Second guide carriage 43 First mount 23 First X-axis drive unit 44 Second mount unit 45 First mount guide rail 24 Second X-axis drive unit 46 First Y-axis guide rail 25 First Z-axis adjustment unit

47 Second tool holder guide rail 72 Second longitudinal extension of the second tool holder 48 Second Y-axis guide rail 73 Tool length 49 First Y-drive motor 74 Third tool holder comb 50 Second Y-drive motor 75 Fourth tool holder comb 51 Swivel motor 76 Third tool holder recesses 52 First rotary table 77 Fourth tool holder recesses 53 First rotary axis 78 Comb holder 54 Second rotary table 79 First gripping device 55 Second rotary axis 80 First gripping unit 56 First rotary motor 81 Second gripping unit 57 Second rotary motor 82 First gripping unit spacing 58 Y-axis adjustment unit 83 Gripping device carrier 59 First workpiece holder 84 Second gripping device location 85 Third gripping unit 60 Second workpiece holder 86 Fourth gripping unit location 87 Second gripping unit spacing 61 Tool changer 88 Gripping device spacing 62 Tool magazine 89 Third gripping device 63 Storage level 90 Fourth gripping device 64 First tool holder 91 Gripping device head location 92 C Gripping device carrier 65 Second tool holder rail location 93 Gripping device head slide 66 Distance 94 Gripping device carrier 67 First receiving comb actuator motor 68 Second receiving comb 95 Gripping device height adjustment 69 First receiving recess 70 Second receiving recesses 96 Gripping device main carrier 71 First longitudinal extension of first tool holder location 97 First holder 98 Second holder

Handling system

third X-axis adjustment unit

fourth X-axis adjustment unit

third guide carriage

fourth guide carriage

third X-axis guide rail fourth X-axis guide rail first X-axis compensation unit second X-axis compensation unit first lower receiving troughs

second lower receiving trough locking device

axis

Enclosure

Opening

third turntable

fourth turntable

AT 527 080 B1 2025-06-15

Claims (1)

Patent claims 1. A machine tool (1) comprising: a machine frame (4); at least one first work spindle (5) which is mounted for rotation about a first spindle axis (7), wherein the first spindle axis (7) is arranged parallel to a horizontal Z-axis (9); a workpiece clamping device (38) which is designed to receive at least one first workpiece (2); a tool magazine (62) for storing different machining tools (16), wherein at least one storage level (63) with a plurality of tool receiving locations (64, 65) arranged next to one another is provided in the tool magazine (62), characterized in that the tool receiving locations (64, 65) are aligned parallel to the horizontal Z-axis (9), wherein the machining tools (16) can be received in the tool magazine (62) aligned parallel to the horizontal Z-axis (9), and wherein the individual tool receiving locations (64, 65) are arranged next to one another at a distance from one another in a horizontal X-axis (10). 2, Machine tool (1) according to claim 1, characterized in that in the tool magazine (62) in the Z-axis (9) several tool receiving positions (64, 65) are arranged one behind the other. 3. Machine tool (1) according to claim 2, characterized in that the tool receiving locations (64, 65) have a longitudinal extension (71, 72) in the Z-axis (9), wherein the longitudinal extension (71, 72) of at least some of the tool receiving locations (64, 65) arranged one behind the other is adjustable. 4. Machine tool (1) according to one of the preceding claims, characterized in that the tool magazine (62) comprises a first receiving comb (67) and a second receiving comb (68), wherein the first receiving comb (67) has first receiving troughs (69) and the second receiving comb (68) has second receiving troughs (70), wherein the first receiving comb (67) and the second receiving comb (68) are arranged at a distance from one another in the extension of the horizontal Z-axis (9), wherein one of the first receiving troughs (69) serves to deposit one of the machining tools (16) and one of the second receiving troughs (70) serves to deposit another of the machining tools (16). 5. Machine tool (1) according to claim 4, characterized in that the first receiving comb (67) and/or the second receiving comb (68) are designed to be displaceable along the horizontal Z-axis (9) relative to the machine frame (4). 6. Machine tool (1) according to claim 5, characterized in that the first receiving comb (67) is arranged on a comb holder (78), wherein the comb holder (78) is arranged above the first work spindle (5) and is designed to be displaceable along the horizontal Z-axis (9), in particular that the comb holder (78) simultaneously forms part of the housing (112) of a machining space of the machine tool (1). 7. Machine tool (1) according to one of claims 3 to 6, characterized in that the longitudinal extent (71, 72) of at least two tool receiving locations (64 or 65) arranged next to one another with respect to the horizontal Z-axis (9) is adjustable independently of one another. 8. Machine tool (1) according to claim 4 and 7, characterized in that the tool magazine (62) comprises a third receiving comb (74) and a fourth receiving comb (75), wherein the third receiving comb (74) has third receiving recesses (76) and the fourth receiving comb (75) has fourth receiving recesses (77), wherein the third receiving comb (74) is spaced apart in the horizontal X-axis (10) next to the first receiving 10. 11. 12. 13. 14. 15. AT 527 080 B1 2025-06-15 comb (67) is arranged and the fourth receiving comb (75) is arranged spaced apart in the horizontal X-axis (10) next to the second receiving comb (68), wherein the first receiving comb (67), the second receiving comb (68), the third receiving comb (74) and the fourth receiving comb (75) are designed to be displaceable independently of one another along the horizontal Z-axis (9) relative to the machine frame (4). Machine tool (1) according to one of claims 4 to 8, characterized in that at least two of the receiving recesses (69, 70, 76, 77) are arranged next to one another per work spindle (5, 6, 12, 14). Machine tool (1) according to one of the preceding claims, characterized in that a first gripping device (79) is designed for exchanging the machining tool (16) accommodated in the first work spindle (5), wherein the first gripping device (79) has at least a first gripping unit (80) and a second gripping unit (81), which are arranged at a first gripping unit distance (82) from one another, wherein the first gripping unit (80) and a second gripping unit (81) are aligned parallel to the Z-axis (9), in particular that the first gripping device (79) is displaceable exclusively along the X-axis (10) and along a vertical Y-axis (11), but not along the Z-axis (9). Machine tool (1) according to claim 10, characterized in that a second gripping device (84) is designed for exchanging the machining tool (16) accommodated in the second work spindle (6), wherein the second gripping device (84) has at least a third gripping unit (85) and a fourth gripping unit (86), which are arranged at a second gripping unit distance (49) from one another, wherein the first gripping device (79) and the second gripping device (84) are arranged next to one another on a common gripping device carrier (83) at a distance (88) from one another in the horizontal X-axis (10) and are displaceable together by means of the common gripping device carrier (83). Machine tool (1) according to one of the preceding claims, characterized in that a second work spindle (6) is formed, which is arranged next to the first work spindle (5) with respect to the horizontal X-axis (10), in particular that the second work spindle (6) is assigned to a second tool receiving location (65). Machine tool (1) according to one of claims 4 to 12, characterized in that the first receiving comb (67) has first lower receiving troughs (108) opposite the first receiving troughs (69), and the second receiving comb (68) has second lower receiving troughs (109) opposite the second receiving troughs (70), wherein the first receiving comb (67) is designed to be pivotable through 180° with respect to a horizontal axis (111), so that either the first receiving troughs (69) or the first lower receiving troughs (108) can be arranged on top, wherein the first receiving comb (67) and/or the second receiving comb (68) has a locking device (110) for securing the machining tools (16), so that the machining tools (16) located underneath are secured against falling out. Machine tool (1) according to one of claims 4 to 13, characterized in that the first receiving comb (67) together with the machining tools (16) received thereon can be exchanged by means of a handling system (99). Method for operating a machine tool (1) according to one of the preceding claims, comprising a machine frame (4), a first work spindle (5) which is mounted rotatably about a first spindle axis (7), wherein the first spindle axis (7) is arranged parallel to a horizontal Z-axis (9), and a workpiece clamping device (38) which is designed to receive at least one first workpiece (2), and a tool magazine (62) for storing different machining tools (16), wherein at least one storage level (63) with a plurality of tool receiving locations (64, 65) arranged next to one another is provided in the tool magazine (62), wherein the tool receiving stations (64, 65) are aligned parallel to the horizontal Z-axis (9), wherein the tool receiving stations (64, 65) are arranged next to one another with respect to a horizontal X-axis (10), the method comprising the method steps: - machining the first workpiece (2) by means of a machining tool (16) accommodated in the first work spindle (5); - Changing the machining tool (16), whereby the machining tool (16) previously held in the first work spindle (5) is placed parallel to the horizontal Z-axis (9) in one of the tool holding positions (64, 65) in the tool magazine (62). 16. The method according to claim 15, characterized in that, for changing the machining tool (16), a machining tool (16) deposited in a first receiving comb (67) of a comb holder (78) of the tool magazine (62) is gripped by means of a first gripping unit (80) of a gripping device (79) and is lifted along the Y-axis (11), wherein the comb holder (78) is arranged above the first work spindle (5), and wherein the comb holder (78) is subsequently displaced along the Z-axis (9) so that the gripping device (79) can be moved along the Y-axis (11) into the machining space without the gripping device (79) having to be displaced along the Z-axis (9), wherein the machining tool (16) located in the first work spindle (5) is picked up by means of a second gripping unit (81) of the gripping device (79), and the machining tool (16) located in the first gripping unit (80) is inserted into the first work spindle (5). 17. The method according to claim 15 or 16, characterized in that in the tool magazine (62) a plurality of tool receiving locations (64, 65) are arranged one behind the other in a staggered manner in the Z-axis (9), wherein the tool receiving locations (64, 65) have a longitudinal extent (71, 72) in the Z-axis (9), wherein the longitudinal extent (71, 72) of at least some of the tool receiving locations (64, 65) arranged one behind the other is adjustable, wherein the longitudinal extent (71, 72) of the tool receiving locations (64, 65) in the Z-axis (9) is adapted to a tool length (73) of the machining tools (16) to be deposited, wherein a different longitudinal extent (71, 72) is set in different tool receiving locations (64, 65) arranged one behind the other. 18. The method according to claim 17, characterized in that in a computer-implemented method step, a storage position of the machining tools (16) and the necessary longitudinal extent (71, 72) of the individual tool holder locations in the Z-axis (9) are calculated by means of a digital computer, wherein the calculation serves to minimize the tool change time and wherein the following parameters are taken into account in the calculation: - a travel speed of a gripping device (79); - the distance from the respective tool holding location (64, 65) to the first work spindle (5); - a frequency of use of the processing tools to be stored (16). 19. Method according to one of claims 15 to 18, characterized in that the gripping device (79) is used to adjust the longitudinal extent (71, 72) of the tool receiving locations (64, 65) in the Z-axis (9). 20. Method according to one of claims 15 to 19, characterized in that the machining tools (16) accommodated in the tool magazine (62) are repositioned by means of the gripping device (79) when the gripping device (79) is not currently carrying out a tool change. 11 sheets of drawings