JP2018065193A - NC lathe - Google Patents

Abstract

An NC lathe capable of performing laser machining in addition to cutting is provided. A plurality of tool mounting portions 44 are provided on a turret main body of a turret of an NC lathe at intervals in the circumferential direction. A cutting tool for cutting the workpiece is attached to the plurality of tool attachment portions 44, and at least one of the plurality of tool attachment portions 44 is for performing laser processing on the workpiece. A laser processing unit 52 is attached. The laser processing unit 52 includes a laser head for irradiating a laser beam, a head support body 64 for supporting the laser head, an optical fiber for guiding the laser beam to the laser head, and a cylindrical member for winding the optical fiber. 80. [Selection] Figure 6

Description

  The present invention relates to an NC lathe that performs cutting by numerical control.

  An NC lathe is widely used as a machine tool for cutting a workpiece (see, for example, Patent Document 1). This NC lathe includes a lathe body, a spindle that is rotatably supported by the main spindle portion of the lathe body, chuck means attached to the spindle, a turret support portion that is attached to the turret mounting portion of the lathe body, and a turret support. The workpiece to be processed is detachably attached to the chuck means. Further, the turret is provided with a plurality of tool mounting portions at intervals in the circumferential direction, and a cutting tool for cutting a workpiece is attached to each tool mounting portion to change the rotation angle position of the turret. By this, it is possible to select a processing tool for cutting a workpiece. With this type of NC lathe, it is possible to perform cutting using a cutting tool on the workpiece held by the chuck means.

  On the other hand, as a welding apparatus that performs welding on a workpiece, a laser welding unit is known that is configured to be relatively movable in the X, Y, and Z directions with respect to the workpiece (for example, , See Patent Document 2). In this welding apparatus, the support main body is supported by the apparatus main body installed on the floor or the like so as to be movable in the Y-axis direction, and the intermediate support is supported by this support main body so as to be movable in the Z-axis direction. The body is supported by the intermediate support so as to be movable in the X-axis direction, and the laser welding unit is attached to the attachment support. In this type of welding apparatus, a holding means for holding a workpiece is provided in the apparatus body, and laser processing (laser welding, laser welding unit) is used for the workpiece held by the holding means. Laser cutting, laser engraving, etc.) can be performed as required.

JP2012-91295A JP-A-2005-161377

  Since the conventional NC lathe is designed mainly for cutting, cutting can be performed by attaching the cutting tool to the tool mounting portion of the turret, but welding cannot be performed. On the other hand, since the conventional welding apparatus is designed mainly for welding, laser processing (laser welding, laser cutting, laser marking, etc.) can be performed by attaching a laser welding unit to the mounting support. However, cutting cannot be performed.

  In recent years, the automation of machining has progressed, and NC lathes have been improved in various ways to meet the demand for automation of cutting, and the welding equipment also meets the demand for automation of welding. Although various improvements have been made, there is no one that can perform both cutting and laser processing, and such an apparatus (for example, a workpiece is subjected to welding after being cut) Realization of (thing) is desired. If such a device appears, for example, it becomes possible to weld and integrate cut workpieces with one device, and it is relatively easy and easy to process even difficult shapes. Is possible.

  An object of the present invention is to provide an NC lathe capable of performing laser machining in addition to cutting.

An NC lathe according to claim 1 of the present invention is a lathe main body, a main shaft rotatably supported by a main shaft portion of the lathe main body, and a workpiece mounted on the main shaft for holding a workpiece to be processed. A chuck means; a turret support portion attached to a turret attachment portion of the lathe body; and a turret rotatably supported by the turret support portion, wherein the turret has a plurality of intervals in the circumferential direction. NC lathe equipped with a tool mounting part
A cutting tool for performing cutting on the workpiece is attached to each of the plurality of tool attachment portions, and at least one of the plurality of tool attachment portions is configured to perform laser processing on the workpiece. The laser processing unit is attached.

  In the NC lathe according to claim 2 of the present invention, the laser processing unit is attached to the turret via a substantially L-shaped attachment member, and one end side of the attachment member is at least one tool of the turret. It attaches to an attaching part, The said laser processing unit is attached to the other end side of the said attachment member, It is characterized by the above-mentioned.

  In the NC lathe according to claim 3 of the present invention, the laser processing unit includes a laser head for irradiating laser light, a head support body for supporting the laser head, and laser light to the laser head. An optical fiber for guiding and a cylindrical member for winding the optical fiber, and the head support body is attached to the tool attachment portion of the turret, and the optical fiber is rotated when the turret rotates in a predetermined direction. Is wound around the cylindrical member, and when the turret rotates in a direction opposite to a predetermined direction, the winding state of the optical fiber is released.

  The NC lathe according to claim 4 of the present invention is characterized in that a detachment preventing flange portion for preventing detachment of the optical fiber is provided on the distal end side of the cylindrical member.

  In the NC lathe according to claim 5 of the present invention, in relation to the laser processing unit, a rotation range restricting means for restricting a rotation range of the turret is provided, and the rotation range restricting means is provided. Is characterized by restraining the rotation of the turret beyond the rotation range when the laser processing unit is attached to the tool attachment portion of the turret.

  Further, in the NC lathe according to claim 6 of the present invention, the lathe body is provided with a first main spindle on one side thereof, and the first main spindle is rotatably supported on the first main spindle, A first chuck means is mounted on the first spindle, a second spindle part is provided on the other side, a second spindle is rotatably supported by the second spindle part, and a second chuck means is mounted on the second spindle. The turret is provided in association with the first main shaft and the second main shaft, and the laser processing unit is attached to at least one of the plurality of tool attachment portions of the turret. Features.

  Furthermore, in the NC lathe according to claim 7 of the present invention, a first workpiece is mounted on the first chuck means on the first spindle portion side, and the second chuck means on the second spindle portion side. Is mounted with a second workpiece, and when laser welding is performed using the laser machining unit, the first workpiece held by the first chuck means and the second chuck means held by the first workpiece. The second workpiece is abutted against the second workpiece, and in this abutted state, the first workpiece or the second principal axis is rotated together with the first main shaft, whereby the first workpiece is rotated. The second workpiece or the first workpiece together with the first spindle is driven along with two spindles.

  According to the NC lathe according to the first aspect of the present invention, the turret support portion is attached to the turret attachment portion of the lathe body, and the turret is rotatably supported by the turret support portion, and the turret is spaced circumferentially. A plurality of tool mounting portions are provided. The cutting tool is attached to the plurality of tool attachment portions of the turret, and the laser processing unit is attached to at least one of the plurality of tool attachment portions. Cutting can be performed, and laser processing (laser welding, laser cutting, laser marking, etc.) can be performed on the workpiece by a laser processing unit attached to the tool mounting portion.

  According to the NC lathe according to claim 2 of the present invention, a substantially L-shaped attachment member is used to attach the laser processing unit, and one end side of the attachment member is at least one tool attachment portion of the turret. Since the laser processing unit is attached to the other end side, the laser processing unit can be easily attached to the tool attachment portion of the turret via this attachment member.

  According to the NC lathe according to claim 3 of the present invention, the head support body for supporting the laser head is attached to the tool attachment portion of the turret, and the cylindrical member for winding the optical fiber is provided. Therefore, by positioning the turret at a predetermined rotation angle position, the laser processing unit can be selected as the processing tool and laser processing can be performed on the workpiece. Further, when the turret is rotated in a predetermined direction, the optical fiber is wound around the cylindrical member, and when the turret is rotated in the direction opposite to the predetermined direction, the winding state of the optical fiber is released. It is possible to select a processing tool (cutting tool or laser processing unit) by rotating the turret without a large load acting on the tool.

  Further, according to the NC lathe according to claim 4 of the present invention, since the detachment preventing flange portion is provided on the distal end side of the cylindrical member, the optical fiber wound around the cylindrical member is prevented from being disconnected. be able to.

  Further, according to the NC lathe according to claim 5 of the present invention, the rotation range restraining means for restraining the rotation range of the turret is provided in relation to the laser processing unit. The turret is not rotated to a rotation angle range in which a large load may be applied, thereby preventing the optical fiber from being damaged due to the rotation of the turret.

  According to the NC lathe according to claim 6 of the present invention, the lathe body is provided with the first and second main spindles, and the first and second main spindles are rotatable on the first and second main spindles. Since it is supported, laser processing (for example, laser welding) is performed on the workpiece cut at the first spindle portion and the workpiece cut at the first spindle portion using the laser processing unit. It is possible to process complex shapes with one NC lathe.

  Furthermore, according to the NC lathe according to the seventh aspect of the present invention, when laser welding is performed using the laser processing unit, the first work piece held by the first chuck means and the second chuck means are held. Since the first main shaft and the first work piece (or the second main shaft and the second work piece) are rotated in the abutted state, the first work piece is brought into contact with the second work piece. The second spindle and the second workpiece (or the first spindle and the first workpiece) are driven by the rotation of the workpiece (or the second workpiece), and thus the first and second workpieces are the same. Laser welding can be performed by rotating at a peripheral speed.

The front view which shows simply one Embodiment of NC lathe according to this invention. The simplified front view which shows the state when cutting the workpiece hold | maintained at the 1st main spindle part using NC lathe of FIG. The simplified front view which shows the state when cutting the workpiece hold | maintained at the 2nd main spindle part using NC lathe of FIG. The simplified front view which shows the state when welding the workpiece hold | maintained at the 1st and 2nd main spindle part using the NC lathe of FIG. The front view which shows the laser processing unit with which the NC lathe of FIG. 1 was equipped. Sectional drawing which shows the attachment state to the turret of the laser processing unit shown in FIG. The figure which shows a state when carrying out laser welding using the laser processing unit shown in FIG. The figure which shows a state when rotating a turret in the predetermined direction from the state shown in FIG. The figure which shows a state when rotating a turret in the direction opposite to a predetermined direction from the state shown in FIG. FIG. 10A is a diagram showing a state when the turret is moved in a direction close to the first main shaft portion, and FIG. 10B is a view when the turret is moved in a direction away from the first main shaft portion. FIG.

  Hereinafter, an embodiment of an NC lathe according to the present invention will be described with reference to the accompanying drawings. In FIG. 1, the illustrated NC lathe includes a lathe body 2 installed on the floor of a factory, and a first main spindle 4 is provided on one side (left side in FIG. 1) of the lathe body 2. Yes. A first main shaft (not shown) is rotatably supported in the first main shaft portion 4, and a first chuck means 6 is mounted on the first main shaft, and a first chuck to be processed into the first chuck means 6. A workpiece 8 is detachably mounted. The first main shaft is rotated in a predetermined direction by a first drive source 10 (for example, composed of an electric motor), and is integrated with the first main shaft and the first chuck means 6 held by the first chuck means 6. The workpiece 8 is rotated.

  In this embodiment, the second main shaft portion 12 is provided on the other side portion (right side portion in FIG. 1) of the lathe body 2, and a second main shaft (not shown) is rotatably supported in the second main shaft portion 12. Has been. A second chuck means 14 is attached to the second spindle, and a second workpiece 16 to be processed is detachably attached to the second chuck means 14. The second main shaft is rotated in a predetermined direction by a second drive source 18 (for example, composed of an electric motor), and is integrated with the second main shaft and the second chuck means 14 held by the second chuck means 14. The workpiece 16 is rotated.

  In this embodiment, the second main shaft portion 12 is movably supported on the lathe body 2 via a slide support mechanism 20 (see FIG. 2). The slide support mechanism 20 includes a guide support rail 22 (see FIG. 2) for guiding and supporting the second main shaft portion 12 and a second main shaft portion for moving the second main shaft portion 12 along the guide support rail 22. A sliding drive source 24 (for example, an electric motor) (see FIG. 1), and this guide support rail 22 is in the axial direction of the second main axis (the Z-axis direction, in FIG. ). When the drive source 24 is rotated in a predetermined direction, the second main shaft portion 12 is moved along the guide support rail 22 in a direction close to the first main shaft portion 4 (leftward in FIG. 1). When 24 is rotated in the direction opposite to the predetermined direction, the second main shaft portion 12 is moved along the guide support rail 22 in a direction away from the first main shaft portion 4 (rightward in FIG. 1). In this embodiment, the first main shaft portion 4 is fixedly provided on the lathe main body 2, and the lathe main body 2 is capable of reciprocating freely in the direction in which the second main shaft portion 12 approaches and separates from the first main shaft portion 4. On the contrary, the second main shaft portion 12 is fixedly provided on the lathe body 2 and is reciprocated in the direction in which the first main shaft portion 4 approaches and separates from the second main shaft portion 12. The lathe body 2 may be movably supported, or both the first and second main shaft portions 4 and 12 may be supported by the lathe body 2 so as to reciprocate.

  2 and 4 together with FIG. 1, a reciprocating table 26 is provided between the first main spindle portion 4 and the second main spindle portion 12, that is, in the horizontal intermediate portion of the lathe body 2 (see FIGS. 2 to 4). Is supported so as to be movable in the axial direction of the first and second spindles (the Z-axis direction and the left-right direction in FIG. 1). A lower slide support mechanism 28 is interposed between the reciprocating table mounting portion 27 and the reciprocating table 26 of the lathe body 2, and the lower slide support mechanism 28 extends in the Z-axis direction. In association with the lower slide support mechanism 28, a drive source (not shown) for lower slide (for example, constituted by an electric motor) is provided, and when the drive source is rotated in a predetermined direction, the reciprocation is performed. When the table 26 is moved along the lower slide support mechanism 28 in the direction indicated by the arrow 30 close to the first main shaft portion 4 and this drive source is rotated in the direction opposite to the predetermined direction, the reciprocating table 26 is moved downward. It is moved along the support mechanism 28 in the direction indicated by the arrow 32 close to the second main shaft portion 12.

  An intermediate support table 39 is movably supported on the reciprocating table 26 via an intermediate slide mechanism 37, and a turret support portion 35 is movably supported on the intermediate support table 39 via an upper slide support mechanism 34. A turret 36 is rotatably supported on the turret support portion 35.

  The intermediate slide mechanism 37 extends in the front-rear direction of the lathe body 2 (a direction perpendicular to the paper surface in FIGS. 1 to 4), and a drive source for intermediate slide (not shown) is associated with the intermediate slide mechanism 37. ) (For example, composed of an electric motor). Therefore, when the drive source for the intermediate slide is rotated in a predetermined direction, the intermediate support table 39 is moved forward in the front-rear direction along the intermediate slide mechanism 37, and this drive source is rotated in the direction opposite to the predetermined direction. Then, the intermediate support table 39 is moved rearward in the front-rear direction along the intermediate slide mechanism 37.

  The upper slide support mechanism 34 extends obliquely downward toward the front surface side of the lathe body 2 and extends in a direction perpendicular to the axial directions of the first and second main axes (X-axis direction). In association with the upper slide support mechanism 34, an upper slide drive source (not shown) (for example, an electric motor) is provided, and when the drive source is rotated in a predetermined direction, the turret In a direction (front side of the lathe body 2) where the support portion 35 is close to the first and second workpieces 8 and 16 held by the first and second chuck means 6 and 14 along the upper slide support mechanism 34. When the drive source is moved obliquely downward and rotated in the direction opposite to the predetermined direction, the turret support 35 is held by the first and second chuck means 6 and 14 along the upper slide support mechanism 34. It is moved obliquely upward in the direction separating from the first and second workpieces 8 and 16 (the rear surface side of the lathe body 2).

  In this embodiment, the upper slide support mechanism 34 (in other words, the X axis) is provided to be inclined obliquely downward toward the front side of the lathe body 2, so that the Y axis of the lathe body 2 is supported by this upper slide support. It extends perpendicularly to the mechanism 34 (X axis) (that is, obliquely upward with respect to the horizontal). Therefore, in such an NC lathe, the amount of movement of the turret 36 in the Y-axis direction is the amount of movement of the intermediate support table 39 in the front-rear direction via the intermediate slide support mechanism 37 and the amount of movement through the upper slide support mechanism 34. The amount of movement is controlled by combining the amount of movement of all turret support portions 35 in the X-axis direction.

  The turret 36 includes a polygonal turret body 38, and the turret body 38 is rotatably supported by the turret support portion 35 via a support shaft (not shown). A turret drive source (not shown) (for example, an electric motor) is provided in association with the turret 36, and the turret 36 is supported when the drive source is rotated in a predetermined direction. When the shaft is rotated in the direction indicated by an arrow 40 (see FIG. 5) (clockwise as viewed from the left in FIGS. 1 to 4), and when this drive source is rotated in a direction opposite to the predetermined direction, The turret 36 is rotated through the support shaft in the direction indicated by the arrow 42 (see FIG. 5) (counterclockwise as viewed from the left in FIGS. 1 to 4).

  A plurality of tool mounting portions 44 are provided around the turret 36 (turret body 38) at intervals in the circumferential direction. The plurality of tool mounting portions 44 have substantially the same configuration, and one of them will be described below with reference to FIGS. A plurality of mounting screw holes 48 (see FIG. 2) are provided on the mounting surface 46 of the tool mounting portion 44 (a rectangular surface on the outer peripheral surface side of the turret body 38).

  In this NC lathe, as understood from FIGS. 1 to 4, a cutting tool 50 for performing cutting and a laser processing unit 52 for performing laser processing are selectively attached to each tool mounting portion 44. It is done. For example, as shown in FIG. 2, the first tool holder 54 is attached to the attachment screw hole 48 of the tool attachment surface 46 of the tool attachment portion 44 using an attachment bolt (not shown). By attaching the cutting tool 50 to the first workpiece 8, the first workpiece 8 held by the first chuck means 6 can be cut. Further, by changing the rotational angle position of the turret 36, another cutting tool 50 attached to the turret body 38 can be selected and the first workpiece 8 can be cut.

  Further, for example, as shown in FIG. 3, the second tool holder 56 is attached to the tool attachment surface 46 of the tool attachment portion 44 as described above, and the cutting tool 50 is attached to the second tool holder 56. The second workpiece 16 held by the two chuck means 14 can be cut. Further, as described above, by changing the rotational angle position of the turret 36, another cutting tool 50 attached to the turret body 38 can be selected and the second workpiece 16 can be cut.

  Further, as shown in FIG. 4, the first workpiece 8 and / or the second chuck held by the first chuck means 6 by attaching the laser processing unit 52 to the tool attachment surface 46 of the tool attachment portion 44. The second workpiece 16 held by the means 14 can be subjected to laser processing (for example, laser welding, laser cutting, laser marking, etc.), and further the first workpiece held by the first chuck means 6 8 and the second workpiece 16 held by the second chuck means 14 can be brought into contact with each other to perform laser processing such as laser welding. In this laser welding process, the first workpiece 8 held by the first chuck means 6 and the second workpiece 16 held by the second chuck means 14 are abutted against each other, and both are the same. While rotating at a peripheral speed, the first and second workpieces 8 and 16 may be rotated over one circumference while being irradiated with laser light from the laser processing unit 52, or may be welded. In a state where the workpiece 8 and the second workpiece 16 are abutted with each other, the first workpiece 8 is rotated at a predetermined circumferential speed (at this time, the second workpiece 16 is driven to move at the same circumferential speed). Or the second workpiece 16 is rotated at a predetermined peripheral speed (the first workpiece 8 is driven and rotated at the same peripheral speed) for welding. Well, in this case, the rotation of the first and second workpieces 8 and 16 is synchronized. It needs to be eliminated.

  Next, the illustrated laser processing unit 52 and the configuration related thereto will be described with reference to FIGS. The illustrated laser processing unit 52 is a laser head 62 for irradiating laser light, a head support body 64 for supporting the laser head 62, and laser light from a laser light generator (not shown). An optical fiber (not shown) for guiding the head 62 is provided, and this optical fiber is covered with a protective tube 66. Accordingly, the laser light generated by the laser generator is guided to the laser head 62 through the optical fiber (not shown), and the laser processing area (for example, the first workpiece 8 and the second workpiece 8) is guided from the laser head 62. Irradiation toward the workpiece 16).

  The head support body 64 is attached to the tool attachment portion 44 of the turret body 38 via an attachment member 68. The attachment member 68 is substantially L-shaped, and its one end 70 (one end side attachment) is screwed onto the attachment surface 46 of the tool attachment 44 and the attachment bolt 72 is screwed into the attachment screw hole 48 (see FIG. 2). It is attached by doing. The head support body 64 is attached to the other end portion 74 (the other end side attachment portion) of the attachment member 68 via the fixing bolt 76, and the head support body 64 is thus attached via the attachment member 68. It is attached to the tool attachment portion 44 of the turret body 38.

  A unit housing 78 is provided in association with the head support body 64. The unit housing 78 covers most of the head support body 64 and a part of the protective tube 66 that covers the optical fiber. The unit housing 78 protrudes through the tip wall.

  Further, a cylindrical member 80 (see FIGS. 7 to 9) for winding the optical fiber (the protective tube 66 covering the optical fiber) is provided. In this embodiment, the cylindrical member 80 is attached to the side surface of the turret main body 38, and an optical fiber (a protective tube 66 covering the optical fiber) guided from a laser generator (not shown) is attached to the cylindrical cylindrical member 80. After being wound, the laser beam is guided to the laser head 62 through the unit housing 78. A detachment preventing flange portion 82 is disposed on the distal end side (left end portion side in FIG. 10) of the cylindrical member 80. In this embodiment, an outer cover member 84 is disposed so as to cover the outer peripheral side of the cylindrical member 80, and an inner flange portion that protrudes radially inward over a predetermined angle range is provided at the distal end portion of the outer cover member 84. The inner flange functions as a detachment prevention flange portion 82, and the detachment prevention flange portion 82 prevents the optical fiber (the protective tube 66 covering it) from being detached from the cylindrical member 80. The optical fiber and the protective tube 66 covering the optical fiber are wound around the cylindrical member 80 through the opening 86 of the outer cover member 84.

  In this embodiment, the detachment prevention flange portion 82 is provided on the outer cover member 84, but this detachment prevention flange portion 82 may be provided at the distal end portion of the tubular member 80 instead of such a configuration. . Further, the cylindrical member 80 and the outer cover member 84 are provided on the side surface of the turret main body 38, but may be provided on the head support member 64 when the head support main body 64 has sufficient strength. .

  In this embodiment, an injection nozzle 92 for injecting an inert gas (for example, nitrogen gas) is further provided in association with the laser head 62. The injection nozzle 92 is connected to an inert gas supply source (for example, an inert gas supply cylinder), and the inert gas from the inert gas supply source is injected from the injection nozzle 92 toward the laser processing region, and laser welding is performed. It is possible to suppress the oxidation of the workpiece during the process.

  The laser processing unit 52 described above can be attached to any one of the plurality of tool attachment portions 44 of the turret main body 38 of the turret 36, and one of these tool attachment portions 44 (this tool attachment portion is attached to a specific tool attachment portion). When it is attached to the portion 44A), it is desirable to configure as follows. 7 to 9, when the laser processing unit 52 is attached to the specific tool attachment portion 44A and laser processing (for example, laser welding) is performed in the laser processing area, the turret 36 (turret body 38) is 7, the laser beam is irradiated from the laser head 62 of the laser processing unit 52, and laser welding is performed.

  When the laser processing unit 52 is attached in this way, the cylindrical member 80 or the like is attached to the opposite side surface of the turret body 38, so that the cutting tool 50 is attached to the tool attachment portion 44 on the opposite side of the turret body 38. Therefore, in connection with the laser processing unit 52, a rotation range restraining means (not shown) for restraining the rotation range of the turret 36 (turret body 38) is provided. desirable.

  In this embodiment, when the laser processing unit 52 is attached to the specific tool attachment portion 44A, it is rotated over two angular ranges of the tool attachment portion 44 in the direction indicated by the arrow 40 with reference to the specific tool attachment portion 44A. The rotation range restraining means (not shown) is configured to be capable of rotating over two angular ranges of the tool mounting portion 44 in the direction indicated by the arrow 42. The first rotation angle shown in FIG. The rotation in the direction indicated by the arrow 40 exceeding the position is prevented, and the rotation in the direction indicated by the arrow 42 exceeding the second rotation angle position shown in FIG. 9 is prevented. Such rotation prevention of the turret 36 designates an angle range of the tool attachment tool 44 that allows rotation with reference to the specific tool attachment portion 44A to which the laser processing unit 52 is attached, and the rotation exceeds this angle range. For example, it can be performed by program control.

  In the embodiment described above, the laser processing unit 52 is attached to an arbitrary tool attachment portion 44, the rotation angle range of the turret body 38 is set with the tool attachment portion 44 attached with the laser processing unit 52 as the specific tool attachment portion 44A, Although rotation exceeding the rotation angle range is prevented by a rotation range restraining means (not shown), only one of the plurality of tool mounting portions 44 of the turret 36 is cut instead of such a configuration. Either the tool 50 or the laser processing unit 52 may be configured to be selectively attachable. In this case, the rotation angle range that allows the turret body 38 to rotate can be set in advance, and the laser When the processing unit 52 is attached, rotation exceeding the rotation angle range is prevented by a rotation range restraining means (not shown).

  Further, in the above-described embodiment, the turret 36 (turret body 38) is allowed to rotate over the two tool mounting portions 44 in both rotation directions with reference to the specific tool mounting portion 44A. The allowable rotation range of 36 can be, for example, one for one side and three for the other side. If there is no risk of damage to the optical fiber, for example, three for one side. It can be divided into three parts on the other side.

  In such an NC lathe, as shown in FIGS. 7 to 9, a cover member 102 is provided so as to cover almost the entire laser processing unit 52 (such as the outer cover member 84) and the turret 36. When the reciprocating table 26 moves relative to the lathe body 2, the optical fiber wound around the cylindrical member 80 and the protective tube 66 covering the optical fiber are in the state shown in FIG. That is, when the reciprocating table 26 moves in the direction approaching the first main shaft portion 4, the optical fiber and the protective tube 66 covering the optical fiber are arranged on the outer peripheral surface of the cylindrical member 80 as shown in FIG. When the reciprocating table 26 is moved in the direction close to the second main shaft portion 12 as shown in FIG. 10B, the optical fiber and the protective tube 66 covering the optical fiber are closed. The outer circumferential surface of the cylindrical member 80 is expanded in the width direction (axial direction), and even if the reciprocating table 26 is reciprocated in this way, a large stress is not applied to the optical fiber, thereby preventing the damage. be able to.

  As mentioned above, although one embodiment of the NC lathe according to the present invention has been described, the present invention is not limited to such an NC lathe, and has a configuration including one spindle portion and one turret corresponding to the spindle portion. The present invention can be similarly applied to an NC lathe, an NC lathe having two main shaft portions, and a turret corresponding to each of the two main shaft portions (that is, two turrets).

2 Lathe body 4 First spindle portion 6 First chuck means 8 First workpiece 12 Second spindle portion 14 Second chuck means 16 Second workpiece 20 Slide support mechanism 36 Turret 38 Turret body 44 Tool mounting portion 44A Specific Tool mounting part 50 Cutting tool 52 Laser processing unit 62 Laser head

Claims (7)

A lathe main body, a main spindle rotatably supported on the main spindle of the lathe main body, chuck means for holding a workpiece to be machined mounted on the main spindle, and attached to a turret mounting portion of the lathe main body In an NC lathe provided with a plurality of tool mounting portions provided at intervals in the circumferential direction, the turret support portion and a turret supported rotatably on the turret support portion.
A cutting tool for performing cutting on the workpiece is attached to each of the plurality of tool attachment portions, and at least one of the plurality of tool attachment portions is configured to perform laser processing on the workpiece. NC lathe, which is equipped with a laser processing unit.   The laser processing unit is attached to the turret via a substantially L-shaped attachment member, one end side of the attachment member is attached to at least one tool attachment portion of the turret, and the other end side of the attachment member is The NC lathe according to claim 1, wherein a laser processing unit is attached.   The laser processing unit includes a laser head for irradiating a laser beam, a head support body for supporting the laser head, an optical fiber for guiding the laser beam to the laser head, and a tube for winding the optical fiber. And the head support body is attached to the tool attachment portion of the turret via the attachment member, and when the turret rotates in a predetermined direction, the optical fiber is wound around the tubular member, The NC lathe according to claim 2, wherein the winding state of the optical fiber is released when the turret rotates in a direction opposite to a predetermined direction.   4. The NC lathe according to claim 3, wherein a detachment preventing flange portion for preventing the optical fiber from detaching is provided on a distal end side of the cylindrical member.   In relation to the laser processing unit, a rotation range restricting means for restricting the rotation range of the turret is provided, and the rotation range restricting means attaches the laser processing unit to the tool mounting portion of the turret. 5. The NC lathe according to claim 1, wherein the NC lathe is constrained to turn beyond the turning range of the turret when attached.   The lathe body is provided with a first main shaft portion on one side thereof, a first main shaft is rotatably supported on the first main shaft portion, a first chuck means is mounted on the first main shaft, and the other side. A second main shaft portion is provided at the portion, the second main shaft portion is rotatably supported by the second main shaft portion, a second chuck means is mounted on the second main shaft, and the turret includes the first main shaft and the second main shaft. 2. The NC lathe according to claim 1, wherein at least one of the two main spindles is provided, and the laser processing unit is attached to at least one of the plurality of tool attachment portions of the turret. A first workpiece is mounted on the first chuck means on the first spindle portion side, a second workpiece is mounted on the second chuck means on the second spindle portion side, and the laser processing unit When laser welding is performed using the first workpiece, the first workpiece held by the first chuck means and the second workpiece held by the second chuck means are abutted, and the abutted state The second workpiece is rotated together with the first spindle and the first workpiece or the second spindle, whereby the second workpiece and the first spindle together with the second spindle. The NC lathe according to claim 6, wherein the first workpiece is driven.

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