DK177328B1 - Press machine and method of operating a press machine - Google Patents

Abstract

Press machine (2) comprising a press frame (4) with a press space (6), a first work piece (8) and a second tool part (10), wherein the press machine (2) comprises at least one additional first tool part (8), and a first shear arrangement (14) comprising a first backdrop (16) and first shear means (18), and wherein said first shear arrangement (14) is adapted to displace said first tool portions (8, 8) of said first backdrop (16) with the first displacement means (18) between positions (20) outside the press space (6) and a pressing position (22) within the press space (6) such that one of the first tool parts (8, 8) is arranged opposite the part (10) of the second tool ) in the press room (6) during each press operation, as well as a method of operating a pressure semiautomatic machine (2).

Description

in DK 177328 B1

Pressing Machine and Method for Operating a Pressing Machine Field of the Invention

The present invention relates to a press machine comprising a press frame having a press compartment, a first tool part and a second tool part.

Furthermore, the invention relates to a method of operating a press machine.

BACKGROUND OF THE INVENTION In connection with serial production with press machines, it is desirable that the rate of production, i.e. the time from the time that a form is placed in the press machine to the finished item can be removed and the press machine ready for a new form is as fast as possible. The faster the production rate of the individual press machine, the greater the production capacity, which means that a given production can be carried out by fewer press machines 15 or in less time with the same number of press machines.

From WO 2010/045947 Al is known a deep draw press machine which solves the problem of achieving a faster production rate. The pressing machine comprises two tool parts, one of which is displaced to a position outside the press when the workpiece is to be shaped.

This thereby avoids having to lift tools, pressure shoes, etc. to a position sufficiently high that the workpiece can be released from the tool. This is especially advantageous for deep topics.

A consequence of the faster production rate contributed by the deep-pull press machine in WO 25/06/045947 Al is that more frequent tool changes will occur, as it will take a shorter time to produce a series of items.

The deep-drawing press machine in WO 2010/045947 is unproductive, while tools are changed for new items. Therefore, in a production with frequent tool changes, the full advantage of the increased rate of production to which the machine can contribute will not be achieved.

2 DK 177328 B1

The object of the invention

It is the object of the invention to provide a press machine with an increased production capacity and a method of operating a press machine with an increased production capacity.

5

Description of the Invention

This is achieved in accordance with the present invention with a press machine comprising a press frame having a press space, a first tool part and a second tool part, the pressing machine being characterized in that the press machine comprises at least one additional first tool part, and a first shear arrangement comprising a first backdrop. and first shear means, wherein the first shear arrangement is arranged to shear the first tool parts on the first backdrop with the first shear means between positions outside the press space and a press position within the press space such that one of the first tool parts is disposed opposite the second tool part. 15 the tool part in the press room during each press operation.

Furthermore, this is achieved according to the present invention with a method of operating a press machine comprising a press frame having a press space, at least two first tool parts and a second tool part, each of the first tool parts during operation being alternately displaced by a first displacement arrangement between positions outside the press space and a press position within the press compartment such that one of said at least two first tool parts is positioned opposite a second tool part in the press compartment during each press operation.

25 This allows the machine to work in alternation with the first tool parts or with any one of the first tool parts.

Further, it is achieved that the pressing machine can continue to be productive during most of a tool change, being able to continue to produce with at least one first tool part while preparing a second first tool part. Production must stop only if the other tool needs to be changed.

DK 177328 B1

The pressing machine and method are particularly suitable for use in connection with press machines used in serial production. Particularly advantageous is the use in connection with productions where frequent switching between the production of various items is required, the press machine according to the invention permitting 5 tool changes with minimal production loss. Examples of types of press machines suitable for the implementation of the invention may be mentioned, for example: deep drawing presses, embossing presses, punching presses, bending presses and forging presses. The listed examples should not be considered exhaustive.

10 In operation, one and the other of the first tool parts are alternately shifted into the press room for carrying out a pressing operation. The finished pieces are molded from the first tool part, which is in a position outside the press room. The tool part is then loaded with a new form. This is done at the same time as the second first tool part performs a pressing operation in the press room. This significantly reduces the cycle time.

In one embodiment, the pressing machine according to the invention is characterized in that it comprises two other tool parts which are displaceably arranged in the press space so that they can be displaced by a first displacement arrangement arranged in the press machine, comprising a first backdrop and first displacement means, between positions outside the press space. and a press position in the press room.

According to a further embodiment, the pressing machine according to the invention is characterized in that the pressing machine comprises a second shear arrangement comprising a second backstop and other shear means, the second shear arrangement being arranged for displacing the second tool part on the second backdrop with the second shear means between positions. outside the press room and a press position within the press room so that the second tool part is positioned opposite a first tool part in the press room during each press operation.

Hereby it is achieved that tool change of the other tool part can be done in a particularly simple way.

30 4 DK 177328 B1

According to a further embodiment, the pressing machine according to the invention is characterized in that the pressing machine comprises at least one further tool part and the second shearing arrangement is arranged for displacing the other tool parts on the second backdrop with the other shearing means between positions outside the press space and a pressing position within the press chamber so that one of the second tool parts is arranged opposite a first tool part in the press room during each press operation.

This makes it possible to produce workpieces that require several pressing operations before the workpiece reaches the final design, the respective first and second tool parts being used in pairs in sets.

According to a further embodiment, the pressing machine according to the invention is characterized in that said first and / or second shear arrangement comprises slides and that each tool part is placed in a sled.

This ensures that the first and second tool parts can be mounted in the pressing machine in a simple and reliable way.

In the first shear arrangement, the sleds on the first backdrop are connected to the first backdrop with cooperating guide means. In embodiments with a second shear arrangement, the sleds on the second backdrop are also connected to the second backdrop with cooperating guides.

25 By placing the tool parts in slides, it is avoided that the cooperating guide means should be released when the tool parts have to be replaced. This makes the tool changes faster and more reliable. Furthermore, better tolerances can be obtained.

The tool parts are connected to the slides with cooperatively releasable connecting means, so that the tool parts can be mounted and dismounted quickly and easily.

According to a further embodiment, the press machine according to the invention is characterized in that the slides are optionally separately displaceable or comprise coupling means for cup 5, a slight displacement between positions outside the press room and a press position within the press room.

With separate slides, production can be continued with one tool 5 while the other tool is changed. This requires shear means which are arranged for separate displacement of the carriages. This complicates the structure of the shear agents.

With coupled slides, production stops during tool changes, but the displacement mechanism can be split for the slides. This simplifies the structure of the shear agents.

According to a further embodiment, the pressing machine according to the invention is characterized in that said first and / or second backing comprises rails which extend from a position on one side of the press space through the press room and to a position on the other side of the press room.

This provides a simple way to set up the scenes.

The rails may be passive lubricants which interact with abutment surfaces, wheels or rollers on the slides or tool parts. Alternatively, the rails may be provided with rollers or wheels on which the slides or tool parts roll.

According to a further embodiment, the pressing machine according to the invention is characterized in that said first and / or second scenes comprise switching grooves.

In this way, several positions can be established outside the press room for the tool parts.

30 This is advantageous for frequent tool changes. Here, for example, two tool parts can be active in alternating pressing operations, while a third tool part is prepared in a position where it does not interfere with the displacement of the active tool parts.

6 DK 177328 B1

Furthermore, the additional positions made possible by the shifting grooves can serve as tool parts storage, so that tool change and control of the tool parts inventory can be automated.

According to a further embodiment, the pressing machine according to the invention is characterized in that said first and / or second scenes comprise a closed ring extending through the press opening.

This enables continuous operation with various tools.

In embodiments with a first and second shear arrangement with annular first and second backdrop, tool changes can be automated. The shear means must be arranged so that the tool parts are driven to the full extent of the ring.

According to a further embodiment, the method according to the invention is characterized in that the pressing machine comprises at least one further second tool part, in which each of the other tool parts in operation is alternately displaced by a different displacement arrangement between positions outside the press room and a press position within the press room, so that one of the the other tool parts are positioned opposite a first 20 tool parts in the press space during each press operation.

This enables tool changes to be automated. The method allows the press machine to produce items that require multiple pressing operations with different tools.

25

According to a further embodiment, the pressing machine according to the invention is characterized in that the method comprises a tool change step, wherein a first and / or second tool part is displaced by the first and / or second displacement arrangement, respectively, to a position outside the press space, and wherein said first and / or the second tool part is changed and said at least one additional first and / or at least one additional second tool optionally continues to operate.

7 GB 177328 B1 In embodiments without the second displacement arrangement, the time allowed for the press machine to be unproductive is limited to only the time it takes to install the other tool part in the press room.

5 In embodiments of the second displacement arrangement, it is possible to eliminate unproductive time for the press machine. The pressing machine will produce at a slow rate during preparation for tool change, but will not be unproductive.

DESCRIPTION OF THE DRAWINGS The invention will now be explained in more detail with reference to the accompanying drawing, in which: FIG. 1 is a side elevational view of a press machine in a first embodiment; FIG. 2 is a side elevational view of a press machine in a second embodiment; FIG. Figure 3 is a top view of a press through a press machine in a first operating situation; 4 is a top view of a section through a press machine in another operating situation; FIG. 5 is a top view of a section through a press machine in a third operating situation; FIG. 6 is a top view of a section through a press machine in a cluttered operating situation; FIG. Figure 7 is a top view of a press through a press machine in a fifth operating situation; Fig. 8 is a top view of a section through a press machine in a sixth operating situation; 9 is a top view of a press through a press machine in a seventh operating situation; FIG. 10 shows an illustration from above with a section through a press machine in an eighth operating situation, 8 DK 177328 B1 fig. 11 is a top view of a section through a press machine in a ninth operating situation; FIG. 12 is a top view of a section through a press machine in a third embodiment; FIG. Fig. 13 is a top view of a section through a pressing machine in an operating situation with preparation for the change of one of the first tool parts; 14 is a top view of a section through a press machine in operating situation with the change of one first tool part and second tool part; FIG. Fig. 15 is a top view of a section through a press machine in a 10th embodiment; and Figs. 16 shows a top view of a press through a press machine in a fifth embodiment.

In the description of the figures, identical or similar elements will be denoted by the same reference numerals in the various figures. Thus, no explanation of all details will be given in connection with each figure / embodiment.

DETAILED DESCRIPTION OF THE INVENTION In this specification, the terms right and left are used in relation to the placement of the individual elements in the figures. One skilled in the art will be able to transfer the locations to exemplary embodiments which are, for example, mirrored in relation to the figures.

FIG. 1 shows a side view of a section through a pressing machine 2 in a first embodiment.

25

The press machine 2 comprises a press frame 4 with a press space 6.1 The press space 6 is provided with a first tool part 8 'and a second tool part 10'. The two tool parts 8 ', 10' are the shaping tools for a blank 12 in the press machine 2. The press machine 2 further comprises several non-illustrated parts which are irrelevant to the implementation of the invention in the press machine. For example, press plans, press cylinders, pressure shoes, etc.

9 DK 177328 B1 In FIG. 1, the second tool part 10 'is in a position where, under the influence of a retainer 13, it is pressed against the first tool part designated 8' and the form 12 thereon.

In the embodiment shown, the pressing machine 2 comprises a further first tool part 8 "and a first shear arrangement 14. The shear arrangement 14 comprises a backdrop 16 and first shear means 18.

The first displacement arrangement 14 is arranged for displacement of the first tool parts 8 ', 8'. The first tool parts 8 ', 8' can be shifted alternately or in a specified sequence between positions 20 outside the press space 6 and a press position 22 in the press space 6. In FIG. 1, the pressing machine 2 is shown where one of the first tool parts 8 'is positioned opposite the second tool part 10' in the pressing position 22, so that a blank 12 can be pressed into the shape of a finished workpiece 24.

15

There are positions 20 on each side of the press space 6 such that each of the first tool parts 8 ', 8 "has a position where finished workpieces 24 can be removed and a new blank 12 can be placed on the first tool parts 8', 8", while the pressing machine performs a pressing operation on that of the first tool parts 8 ', 8' which are in the pressing position 20 22 opposite each other.

In FIG. 1, it means that one of the first tool parts denoted by 8 'is shifted alternately between a position 20 on the right side of the press space 6 and the press position 22. The of the first tool parts denoted by 8' is shifted alternately between a position 20 of the left side of the press compartment 6 and the press position 22. The first tool parts 8 ', 8 "may be coupled so that they are displaced synchronously (see Fig. 12) or uncoupled so that they are moved individually (see Fig. 13).

The first backdrop 16 is arranged to receive and guide the first tool portions 8 ', 8 "30 between the positions 20 on each side of the press space 6 and the press position 22.

The guide between the first tool parts 8 ', 8' and the first backdrop 16 can be established in various known ways. It is important that the guide is of low friction in order to limit the energy consumption in connection with displacement of the first tool parts 8 ', 8 ”.

For example, the first backdrop 16 and the first tool parts 8 ', 8 "may be formed with low friction interacting abutment surfaces, with the first tool parts 8', 8" sliding between the various positions 20, 22.

The contact surfaces can be made of a ball table.

Another example may be wheels between the first backdrop 16 and the first tool parts 8 ', 8'.

The first shear means 18 are arranged for displacing the first tool parts 8 ', 8 "on the first backdrop 16. In order for the rate of production to be rapid, it is an advantage that the first shear means 18 be selected so that they can move the first tool parts 8', 8 "at high speed between the individual positions 20, 22.

There are various examples of suitable first displacement means, such as hydraulic, pneumatic, electric or hybrid linear actuators. Alternatively, the first first backdrop 16 or the first tool parts 8 ', 8' may be provided with driven wheels.

The first shear arrangement 14 may comprise a plurality of first shear means 18 operable coupled or uncoupled.

FIG. 2 shows a side view of a section through a pressing machine 2 in another embodiment.

The press machine 2 in the second embodiment differs from the press machine 2 in the first embodiment by including a further second tool part 10 ", and a second shear arrangement 26 comprising a second backdrop 28 and other shear means 30.

11 DK 177328 B1 In fig. 2, the second tool part with the designation 10 'is in a position where, under the influence of the holder 13, it is pressed against the first tool part with the designation 8' and the form 12 thereon.

In this position, the second tool part, designated 10 ', may be released from the second backdrop 28.

The second displacement arrangement 26 is arranged for displacement of the other tool parts 10 ', 10'. The other tool portions 10 ', 10' may be shifted alternately or in a specified sequence between positions 20 outside the press space 6 and a press position 22 in the press space 6. In FIG. 2, the pressing machine 2 is shown where one of the second tool parts 10 'is positioned opposite a first tool part 8' in the pressing position 22, so that a blank 12 can be pressed into the shape of a finished workpiece 24.

15 There are positions 20 on each side of the press space 6 so that each of the first tool parts 8 ', 8 "and other tool parts 10', 10", respectively, has a position where finished workpieces 24 can be removed and a new blank 12 can be placed on the first tool parts 8 ', 8 "or other tool parts 10', 10, while the pressing machine performs a pressing operation on that of the first tool parts 8 ', 8" and that of the second tool parts 20 10', 10 "which are in the press position 22 facing each other.

In FIG. 2, it means that one of the other tool parts denoted by 10 'is alternately displaced between a position 20 on the left side of the press space 6 and the pressing position 22. The other tool parts denoted by 10' are alternately displaced 25 between a position 20 of the right side of the press compartment 6 and the press position 22. The other tool parts 10 ', 10 "may be coupled so that they are displaced synchronously (see Fig. 12) or uncoupled so that they are individually displaced (see Fig. 13).

This second embodiment has a particular advantage in the preparation of 30 blanks, where two pressing operations are required on each blend with different tools before the blend achieves its final shape. The first tool part designated 8 'and the second tool part designated 10' together form a set constituting one tool. Similarly, the first tool part with the designation 8 "and the DK 177328 B1 12 second tool part with the designation 10" together form a set which constitutes the second tool.

Form 12 is first pressed with the one tool for a semi-finished workpiece, after which the respective tool parts 8 ', 8 ", 10', 10" are displaced to positions 22 outside the press space 6 and press position 22, respectively, so that the semi-finished workpiece can be pressed. to a finished item 24 with the other tool.

In this way, items requiring multiple pressures can be produced in one and the same press machine 2, without switching the press machine 2 between each press operation. One avoids having to invest in two press machines 2. Instead, you only need one extra tool to solve the task of one press machine 2 according to this second embodiment of the invention.

15 Furthermore, it is not necessary for the manufacturer to have storage capacity for storing semi-finished items, obtaining finished two-pressure blanks in the same press machine 2.

The form 12 receives its first print with the first tool part denoted 8 'and the second tool part denoted 10' in the press position 22. At the same time, the first tool part denoted 8 "is placed in a position 20 on the left side of the press space 6, where the first tool part 8 "can be loaded with a blank 12. Furthermore, the second tool part with the designation 10" is placed in a position 20 on the right-hand side of the press space 6, where a preceding finished workpiece 24 can be formed. Thus, the first tool part 8 "does not interfere with the molding and the second tool part 10" does not interfere with the preparation with a new form 12.

In the second embodiment shown, loading and unloading take place alternately on one side and the other.

With the positioning of the tool parts shown above and below each other, the forms can be retained on the first tool parts 8 ', 8 ”only under the influence of gravity and deformation from the other tool parts can also be done with the help of gravity.

30 DK 177328 B1 13

The second backdrop 28 is arranged to receive and guide the other tool portions 10 ', 10' between the positions 20 on each side of the press space 6 and the press position 22.

The guide between the other tool parts 10 ', 10' and the second backdrop 28 can be established in various known ways. It is important that the guide is of low friction, to limit the energy consumption associated with displacement of the other tool parts 10 ', 10'.

For example, the second backdrop 28 and the other tool parts 10 ', 10 "may be formed with low friction interacting abutment surfaces, which the other tool parts 10', 10" slide between the different positions 20, 22.

The abutment surfaces can be made of a ball table.

15

Another example may be wheels between the second backdrop 28 and the other tool parts 10 ', 10'.

The other shear means 30 are arranged to shear the other tool parts 20 10 ', 10 "on the second backdrop 28. In order for the rate of production to be rapid, it is advantageous that the second shear means 30 be selected so that they can move the other tool parts 10', 10 ”at high speed between the individual positions 20, 22.

There are various examples of suitable other shear agents such as hydraulic, pneumatic, electric or hybrid linear actuators. Alternatively, the second backdrop 28 or the other tool parts 10 ', 10' may be provided with driven wheels.

The second displacement arrangement 26 may comprise several other displacement means 30 which can be operated coupled or uncoupled.

In FIG. 1 and 2, the first tool parts 8 ', 8 "are shown below the second tool part 10' and the second tool parts 10 ', 10" respectively. Alternatively, the first tool parts 8 ', 8 "may be placed over the second tool part 10' and the second tool parts 10 ', 10' respectively. This has an influence on how the forms 12 are received and the items 24 are formed.

Figures 3-11 each show a top view of a press through a press machine 2 in nine operating situations during a press cycle. By pressing cycle is meant the steps from placing a blank 12 in the pressing machine to deforming the finished blank 24.

The second tool part 10 'and the other tool parts 10', respectively, of associated second displacement arrangement 26 are not shown in FIG. 3-11, being in a plane above the section. One skilled in the art will appreciate that the operating situations shown in FIG. 3-11 can be integrated into both the first and second embodiments, as well as the alternative embodiment, wherein the first tool portions 8 ', 8 "are placed over the second tool portions 10' and the second tool portions 10 ', 10", respectively. Furthermore, in operating situations the principle can be adapted to the later described third, fourth and fifth embodiments of the invention.

FIG. 3 shows a start-up situation for the press machine 2, where both the other tool parts 8 ', 8 "are ready for operation in positions 20 on either side of the press space 6 the press-20 space 6. A blank 12 is ready to be placed on the first tool part with the designation 8 ”. The pull pistons 32 are seen in the press room 6.

In FIG. 4, the form 12 is placed on the first tool part designated 8 ". The first tool part designated 8 "is ready to be displaced into the press chamber 25 6 with the first shear arrangement 14.

In FIG. 5, the first tool part with the designation 8 is "offset to the pressing position 22 inside the press room 6. The press machine 2 is here ready to perform a pressing operation on the form 12 on the first tool part with the designation 8". A new blank 12 'is ready to be placed on the first tool part designated 8'.

In FIG. 6, the first pressing operation has just been completed and the finished workpiece 24 is still on the first tool part with the designation 8 ”which is in press 15 space 17. The new form 12 'is located on the first tool part with the designation 8', which is ready to be displaced by the first displacement means 18 into the press space 6.

5 In FIG. 7, the first tool part with the designation 8 "and the finished workpiece 24 are offset with the first shear means 18 to a position 20 to the left of the press space 6. The first tool part with the designation 8 ', and the new blank 12' are offset with the first shear means. 18 to a press position 22 in the press room 6. The press machine 2 is ready to perform the next press operation on the new blank 10 12 '. At the same time, the finished workpiece 24 is ready to be molded from the first tool part with the designation 8 ”.

In FIG. 8, the finished workpiece 24 has been shaped from the first tool part designated 8 ". At the same time, the next form 12 "is ready to be placed on the first 15 tool part labeled 8". At the same time, the next press operation can be carried out on the new form 12 '.

In FIG. 9, the next pressing operation has just been completed and the next finished workpiece 24 'is still on the first tool part with the designation 8' which is in the press room 6. The next blank 12 "is placed on the first tool part with the designation 8" which is ready to be displaced with the first shear means 18 into the press space 6.

In FIG. 10, the first tool part designated 8 'and the next finished item 24 25 are displaced by the first displacement means 18 to a position 20 to the right of the press space 6. The first tool part labeled 8 "and the next blank 12" are displaced by the first displacement means 18 to a pressing position 22 in the press space 6. The press machine 2 is ready to perform the next pressing operation on the next form 12 ". At the same time, the next finished workpiece is 24 "ready to be molded from the first tool part designated 8".

In FIG. 11, the next finished part 24 'has been shaped from the first tool part designated 8'. At the same time, the next form 12 '"ready to be placed on DK 177328 B1 16 is the first tool part labeled 8". At the same time, the next press operation can be carried out on the new form 12 ”.

The operation of the press machine 2 will then continue with the repetition of the steps of FIG. 6 5 to 11. Until you stop loading forms 12 into the press machine 2.

FIG. 12 is a top view of a section through a press machine 2 in a third embodiment.

The first displacement arrangement 14 comprises slides 34 ', 34'. The first tool parts 8 ', 8 "are located in each carriage 34', 34". The slides are interconnected with coupling means 36 so that they are displaced synchronously. Therefore, the first displacement means 18 need only be coupled to one slide 34 ".

The second displacement arrangement 26 (see Fig. 12) may also be provided with sleds.

In an alternative embodiment (not shown) which can be combined with the first, second, fourth and fifth embodiments, the first tool parts 8 ', 8' are directly coupled to coupling means.

FIG. 13 is a top view of a section through a pressing machine 2 in an operating situation with preparation for changing of the first first tool part designated 8 '.

25

The first first tool part with the designation 8 'is offset to a position 20 outside the press room 6. At the same time, production is continued with the second first tool part with the designation 8 ". The production rate is reduced without ceasing during preparation for tool change.

FIG. 14 is a top view of a section through a pressing machine 2 in operating situation with the change of one first tool part with the designation 8 'and the second tool part 10' and a further second tool part 10 'respectively.

30 17 DK 177328 B1 In FIG. 14, the former first and second tool parts with the designations 8 'and 10', respectively, are removed from the machine and new first and second tool parts with the designations 108 'and 110' are located in the vicinity of the pressing machine 2 for mounting.

In embodiments with only one second tool part 10 'and without the second shear arrangement 26, the new first tool part 108' is placed in the first backdrop 16.

The new second tool part 110 'is placed on top of the new first tool part 108'. When the tool is to be installed in the press machine 2, the new first and second tool parts 108 ', 110' are displaced into the press compartment by the first displacement means 18. Then the new second tool part 110 'is mounted in the press compartment 4. Before the press operations are resumed the new first tool portion 108 'outside the press compartment to be loaded with a blank 12 (not shown).

Production can continue until the new tool parts 108 ', 110' have to be moved into the press room. As soon as the new first tool part 108 'is loaded with a form 12 (not shown), production can resume at the same time as the first tool part with the designation 8 "is replaced with the corresponding second tool part 10' (see Fig. 1).

20 In embodiments with several other tool parts 10 ', 10 "and with the second shear arrangement 26, the new first tool part 108' is placed in the first backdrop 16 and the new second tool part 110 'is placed in the second backdrop 28. Then production with the new tool can continue.

FIG. 15 is a top view of a section through a press machine 2 in a fourth embodiment.

In this embodiment, the first backdrop comprises rails 36 extending from one position on one side of the press space 6 through the press space 6 and to a position 30 on the other side of the press space 6.

18 DK 177328 B1

In addition, it perceives shift grooves (38) thereby establishing an additional position for yet another first tool part 8 ”outside the press space (6). This is especially advantageous in tool switching.

5 In embodiments with a second backdrop 28 and several other tool parts 10 ', 10', the same pressing machine can produce items requiring more pressure to reach the final shape.

FIG. 16 is a top view of a section through a press machine 2 in a fifth embodiment.

The first backdrop 16 comprises a closed ring 40 extending through the press space 6. In the ring, additional first tool parts 8 '", 8" ", 8'", 8 "" ", 8" "" are stored. This allows for quick tool changes which is an advantage in connection with frequent production adjustments.

In an alternative embodiment of the fifth embodiment shown, it comprises a second backdrop 28 formed as a closed ring 40, and a second displacement arrangement 26 and further other tool parts. This makes it possible to take into account 20 frequent production switches with no or very short production stops due to tool changes.

Furthermore, the closed ring 40 can be used as a carousel where the tools are alternately in operation.

25

Furthermore, the alternative embodiment of the fifth embodiment of the press machine 2 can be used where the blank needs a large number of pressures to reach its final shape.

Claims (11)

19 DK 177328 B1 A press machine (2) comprising a press frame (4) with a press space (6), a first tool part (8 ') and a second tool part (10'), characterized in that the press machine (2) comprises at least one additional first tool part ( 8 "), and a first shear arrangement (14) comprising a first backdrop (16) and first shear means (18), wherein the first shear arrangement (14) is arranged to displace the first tool parts (8 ', 8 ") On the first backdrop (16) with the first displacement means (18) between positions (20) outside the press compartment (6) and a press position (22) within the press compartment (6) such that one of the first tool parts (8 ', 8 ") Is placed 10 opposite the second tool part (10) in the press compartment (6) during each press operation. Pressing machine (2) according to claim 1, characterized in that the pressing machine (2) comprises a second shear arrangement (26) comprising a second backing (28) and other shear means (30), wherein the second shear arrangement (26) is arranged. for displacing the second tool part (10 ') on the second backdrop (28) with the other displacement means (28) between positions outside the press space (6) and a pressing position (22) within the press space (6), so that the second tool part ( 10 ', 10 ") is positioned opposite a first tool part (8', 8") in the press compartment (6) during each press operation. Pressing machine according to claim 2, characterized in that the pressing machine comprises at least one further second tool part (10 ") and the second shearing arrangement (26) is arranged for displacing the other tool parts (10 ', 10") on the second backdrop. (28) with the other shear means (10 ', 10 ") between positions outside the press space (6) and a press position (22) within the press space (6) such that one of the other tool parts (10', 10") is positioned opposite a first tool part (8 ', 8 ") in the press compartment (6) during each press operation. Pressing machine according to claim 1, 2 or 3, characterized in that said first and / or 30 second displacement arrangement (14, 26) comprises slides (34 ', 34 ") and that each tool part (8', 8", 10 ', 10 ") is placed in a carriage (34', 34"). 20 DK 177328 B1 Press machine according to claim 4, characterized in that the slides (34 ', 34 ") are optionally separately displaceable or comprise coupling means (36) for coupled displacement between positions outside the press room (6) and a press position (22) within the press room (6). . 5 Pressing machine according to any one of the preceding claims, characterized in that said first and / or second backing (16, 28) comprises rails (36) extending from a position on one side of the press space (6). through the press chamber (6) and to a position on the other side of the press compartment (6). 10 Pressing machine according to claim 5, characterized in that said first and / or second scenes (16, 28) comprise switching grooves (38). Pressing machine according to any one of the preceding claims, characterized in that said first and / or second backdrop (16, 28) comprises a closed ring (40) extending through the press opening. A method of operating a press machine (2) comprising a press frame (4) with a press space (6), at least two first tool parts (8 ', 8') and a second tool part (10 '), wherein each of the first tool parts (8 ', 8 ") during operation is alternately displaced by a first displacement arrangement (14) between positions (20) outside the press space (6) and a pressing position (22) within the press space (6) so that one of the the first tool parts (8 ', 8 ") are arranged opposite a second tool part (10') in the press room (6) during each pressing operation. 25 Method according to claim 9, characterized in that the pressing machine (2) comprises at least one further second tool part (10 "), in which each of the other tool parts (10 ', 10") is alternately displaced by a different displacement arrangement (26). ) between positions (20) outside the press space (6) and a press position (22) within the press space (6) such that one of the second tool parts (10 ', 10 ") is arranged opposite a first tool part (8', 8" ) in the press room (6) during each press operation. 21 DK 177328 B1 Method according to claim 9 or 10, characterized in that the method comprises a tool change step, wherein a first and / or second tool part (8 ', 8', 10 ', 10') is displaced by the first and / or second respectively. displacement arrangement (14, 26) to a position (20) outside the press space (6), and wherein said first and / or 5 second tool parts are shifted (8 ', 8', 10 ', 10'), and wherein said at least one additional first and / or at least one additional other tool part (8 ', 8 ", 10', 10") optionally continues in operation.