Machine tools

Abstract

To provide a machine tool capable of complicated processing with a simple configuration.SOLUTION: A machine tool 1 includes: a first main spindle unit 10 and a second main spindle unit 20 that rotate a workpiece W while holding it; and a first tool post 15 and a second tool post 17 that are movable independently from each other. The first main spindle unit 10 moves along an axial direction, and the second main spindle unit 20 moves along the axial direction and a depth direction crossing with the axial direction. The first tool post 15 and the second tool post 17 move along the depth direction and a vertical direction, respectively. The first tool post 15 is provided with a first comb tooth-shaped tool arranged in the vertical direction in a direction crossing with the first main spindle 11. The second tool post 17 is provided with a second comb tooth-shaped tool arranged in the vertical direction opposite the first comb tooth-shaped tool. Either the first tool post 15 or the second tool post 17 is provided with a rotation tool 18a for processing one end part of the workpiece W and a rotation tool 18c for processing the other end part of the workpiece W.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a machine tool. [Background technology]

[0002] For example, Patent Document 1 discloses a machine tool equipped with an independent opposed gang tool rest and a back tool rest, while Patent Document 2 discloses an automatic lathe equipped with an independent opposed gang tool rest. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Registered Utility Model No. 3228665 [Patent Document 2] Japanese Patent Application Publication No. 06-246508 Summary of the Invention [Problem to be solved by the invention]

[0004] To perform complex machining using a moving-spindle type lathe such as those described in Patent Documents 1 and 2, when performing simultaneous machining using the front tool post, the rear tool post, and also the rear tool post, it is necessary to install an NC (numerical control) device that controls the independent opposing tool post, the rear tool post, and three systems. In addition, it is necessary to provide an additional motor, for example, in the rear tool post.

[0005] The present invention has been made in view of the above circumstances, and has an object to provide a machine tool that is simple in configuration but capable of performing complex machining. [Means for solving the problem]

[0006] In order to achieve the above object, the machine tool according to the present invention comprises: A machine tool for machining a workpiece,The cutting tool is provided with a first spindle unit and a second spindle unit that rotate a workpiece while holding it, and a first tool rest and a second tool rest that are movable independently of each other, wherein the first spindle unit moves along the axial direction of the first spindle, the second spindle unit moves along the axial direction of the second spindle and a depth direction that intersects with the axial direction of the second spindle, the first tool rest and the second tool rest move along the depth direction and the vertical direction, respectively, the first tool rest is provided with a first gang-shaped tool having a plurality of tools vertically arranged in a gang shape in a direction that intersects with the axial direction of the first spindle, and the second tool rest is provided with a second gang-shaped tool having a plurality of tools vertically arranged in a gang shape facing the first gang-shaped tool in a direction that intersects with the axial direction of the first spindle, and a housing part is fixed, and a first outer surface part of the housing part is provided with a rotational member that rotates about a direction parallel to the depth direction. and machining one end of the workpiece held by the first spindle. Multiple First rotary tool is established , The second outer surface portion of the housing portion is provided with a second main shaft, the second main shaft being arranged to rotate about a direction parallel to the axial direction of the second main shaft. The other end of the workpiece held by the second spindle is machined. Multiple a second rotary tool; The plurality of first rotary tools and the plurality of second rotary tools are each rotationally driven by one motor, the machine tool is equipped with a numerical control device that numerically controls the first tool post and the second tool post by two-system control and processes the workpiece with the first gang tool and the second gang tool, the first gang tool or the second gang tool includes the plurality of first rotary tools, all tools provided on the machine tool are provided directly or indirectly on the first tool post and the second tool post, and the workpiece can be simultaneously processed by the first tool post and the second tool post on which all tools are provided. . [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a machine tool that is simple in configuration but is capable of performing complex machining. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front view of a machine tool according to an embodiment of the present invention; [Figure 2] 1 is a plan view of a machine tool according to an embodiment of the present invention; [Figure 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] 3A is a view seen from the arrow B in FIG. 3, (b) is a view seen from the arrow C in (a), and (c) is a cross-sectional view taken along the line DD in (a). [Figure 5] 1(a) to 1(e) are diagrams showing examples of machining by a machine tool according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a machine tool according to an embodiment of the present invention will be described with reference to the drawings. As shown in Figures 1 to 3, machine tool 1, which is a lathe, includes a bed S, which is a base of machine tool 1, a first spindle unit 10 having a first spindle 11, a second spindle unit 20 having a second spindle 21, a first spindle moving mechanism 13Z, a second spindle moving mechanism 23Z, a second spindle moving mechanism 24X, a first tool rest 15, a first tool unit 16, a second tool rest 17, a second tool unit 18, a first tool rest moving mechanism 31X, a first tool rest moving mechanism 32Y, a second tool rest moving mechanism 41X, and a second tool rest moving mechanism 42Y. Hereinafter, the axial direction along the rotation axes of the first main shaft 11 and the second main shaft 21 is defined as the Z-axis direction, the height direction perpendicular to the Z-axis direction is defined as the Y-axis direction, and the direction perpendicular to the Y-axis and Z-axis directions is defined as the X-axis direction.

[0010] As shown in FIG. 1, the first spindle unit 10 holds and rotates a workpiece W. Specifically, the first spindle unit 10 includes a first spindle 11 and a first headstock 12 that rotatably supports the first spindle 11. The first spindle 11 holds one end of the workpiece W. The workpiece W is supplied by a bar supply device (not shown). The first headstock 12 has a built-in workpiece rotation motor (not shown) that rotates the first spindle 11. A portion of the workpiece W outside the first spindle 11 is rotatably supported by the workpiece support portion 14. Specifically, the workpiece support portion 14 is provided with a guide bush 14a that contacts the outer periphery of the workpiece W, and the guide bush 14a rotates in synchronization with the rotation of the first spindle 11, so that even if the workpiece W moves in the Z-axis direction, it is rotatably supported by being supported by the guide bush 14a.

[0011] The second spindle unit 20 is provided at a position facing the first spindle unit 10 in the Z-axis direction, and holds and rotates the workpiece W received from the first spindle unit 10. The second spindle unit 20 includes a second spindle 21 that holds the other end of the workpiece W, and a second spindle stock 22 that rotatably supports the second spindle 21. A workpiece rotation motor (not shown) that rotates the second spindle 21 is built into the second spindle stock 22.

[0012] 1, the first spindle moving mechanism 13Z moves the first spindle unit 10 in the Z-axis direction. The second spindle moving mechanism 23Z moves the second spindle unit 20 in the Z-axis direction. As shown in FIG. 2, the second spindle moving mechanism 24X moves the second spindle unit 20 in the X-axis direction so that it can face the first spindle 11 and the tools of the second tool rest 17 and second tool unit 18.

[0013] As shown in FIG. 1, the first spindle moving mechanism 13Z includes a support base 13a, a ball screw 13b, a bearing 13c, a bearing 13d, a nut 13e, and a motor 13M. The support base 13a is formed integrally with the bed S and is a portion that protrudes upward from the wide flat portion of the bed S. Bearings 13c and 13d are arranged on the support base 13a along the Z-axis direction. The ball screw 13b is rotatably supported by bearings 13c and 13d and is arranged to extend in the Z-axis direction. The nut 13e is fitted onto the outer periphery of the ball screw 13b and is fixed to the underside of the first headstock 12. The motor 13M is attached to the support base 13a. The output shaft of the motor 13M is coaxially connected to one end of the ball screw 13b, and the motor 13M rotates the ball screw 13b under the control of the control unit 300. The rotation of the ball screw 13b causes the nut 13e to move in the Z-axis direction together with the first headstock 12 along the ball screw 13b.

[0014] The second spindle moving mechanism 23Z includes a motor 31M and, like the first spindle moving mechanism 13Z, a support base, a ball screw, a bearing, and a nut. The second spindle moving mechanism 23Z is provided on the second spindle moving mechanism 24X.

[0015] The second spindle moving mechanism 24X includes a support base 24a, a ball screw 24b, a bearing 24c, a bearing 24d, a nut 24e, a rail 24g, a block 24h, and a motor 24M. The support base 24a is formed integrally with the bed S and is a plate-like portion that protrudes upward from the wide flat portion of the bed S. In addition, bearings 24c and 24d are arranged on the bed S along the X-axis direction. The ball screw 24b is rotatably supported by the bearings 24c and 24d and is arranged to extend in the X-axis direction. The nut 24e is fitted onto the outer periphery of the ball screw 24b and is fixed to the underside of the support base of the second spindle movement mechanism 23Z. A pair of rails 24g are each fixed to the support base 24a. A pair of blocks 24h are provided slidably along the rails 24g. In addition, the surface of the block 24h opposite the sliding portion is fixed to the underside of the support base of the second spindle movement mechanism 23Z. The motor 24M is attached to the bed S. The output shaft of the motor 24M is coaxially coupled to one end of the ball screw 24b, and the motor 24M rotates the ball screw 24b under the control of the control unit 300. As the ball screw 24b rotates, the nut 24e moves in the X-axis direction together with the second spindle moving mechanism 23Z along the ball screw 24b.

[0016] The first tool post movement mechanism 31X is provided on the support base 13a of the first spindle movement mechanism 13Z and near the end of the first spindle 11. The first tool post movement mechanism 31X moves the first tool post movement mechanism 32Y in the X-axis direction. Accordingly, the first tool post 15 also moves in the X-axis direction. The first tool rest movement mechanism 32Y is attached to the first tool rest movement mechanism 31X on the side of the second spindle unit 20. The first tool rest movement mechanism 32Y moves the first tool rest 15 in the Y-axis direction.

[0017] A base 50 is disposed on the support stand 13a near the first spindle 11. The base 50 is integrally configured on the left and right sides of the first spindle 11, to which the above-mentioned guide bush 14a is attached, and also constitutes part of the first tool post movement mechanism 31X and the second tool post movement mechanism 41X. Like the second spindle movement mechanism 24X, the first tool post movement mechanism 31X includes a base 50 corresponding to the support base 24a, a ball screw, a bearing, a nut, a rail, and a block (not shown) in addition to the motor 31M. The rail mounting surface of the base 50 faces the second spindle unit 20. Two rails extending in the X-axis direction are attached to the base 50 side by side in the vertical direction. The motor 31M is attached to the side of the base 50. The first tool rest movement mechanism 32Y includes a motor 32M and, like the second spindle movement mechanism 24X, a support base, a ball screw, a bearing, a nut, a rail, and a block (not shown). The first tool rest 15 is provided on the second spindle unit 20 side of the first tool rest movement mechanism 32Y.

[0018] The second tool post movement mechanism 41X is provided alongside the first tool post movement mechanism 31X on the support base 13a of the first spindle movement mechanism 13Z. The second tool post movement mechanism 41X moves the second tool post movement mechanism 42Y in the X-axis direction. Accordingly, the second tool post 17 also moves in the X-axis direction. The second tool rest movement mechanism 42Y is attached to the second tool rest movement mechanism 41X. The second tool rest movement mechanism 42Y moves the second tool rest 17 in the Y-axis direction.

[0019] Similar to the first tool post movement mechanism 31X, the second tool post movement mechanism 41X includes a base 50 corresponding to the support base 24a, a ball screw, a bearing, a nut, rails, and a block (not shown) in addition to the motor 41M. Similar to the first tool post movement mechanism 31X, the second tool post movement mechanism 41X has two rails extending in the X-axis direction that are attached to the base 50 side by side in the vertical direction. The motor 41M is attached to the side of the base 50. The second tool rest movement mechanism 42Y includes a motor 42M and, similarly to the first tool rest movement mechanism 32Y, a support base, a ball screw, a bearing, a nut, a rail, and a block (not shown). The second tool rest 17 is provided on the second spindle unit 20 side of the second tool rest moving mechanism 42Y.

[0020] A tool 15b and a rotary tool 16a are attached to the first tool rest 15. Of these, the rotary tool 16a is included in a first tool unit 16 attached to the first tool rest 15.

[0021] The first tool rest 15 has a plurality of tools 15b arranged in a gang shape in the Y-axis direction. The plurality of tools 15b are held by the first tool rest 15 along the X-axis direction with their cutting edges facing the workpiece W. The tools 15b are, for example, turning tools, and machine the front surface of the workpiece W held by the first spindle 11. In addition, the first tool rest 15 has a drill holder 15c for attaching a drill for machining the front surface of the workpiece W. The first tool unit 16 is a cross drill device located above the tool 15b and drill holder 15c. The first tool unit 16 is located in correspondence with the second tool unit 18 in the X-axis direction. The first tool unit 16 is provided with a plurality of rotary tools 16a for machining the protruding cylindrical portion on the front of the workpiece W. The plurality of rotary tools 16a are arranged vertically in a comb-like pattern, with their respective tips facing the workpiece W along the X-axis. 3, a first comb-shaped tool 15T including a tool 15b and a rotary tool 16a is attached to the first tool rest 15. In this specification, the term "comb-shaped" refers to tools arranged in the vertical direction, and the tool 15b and the rotary tool 16a may be spaced apart in the Z-axis direction. The first tool unit 16 also includes a motor 16M that rotates the rotary tool 16a under the control of the control unit 300.

[0022] The tool 17b, the rotating tool 18a, the fixed tool 18b, and the rotating tool 18c are attached to the second tool rest 17. Of these, the rotating tool 18a, the fixed tool 18b, and the rotating tool 18c are included in the second tool unit 18 attached to the second tool rest 17.

[0023] A plurality of tools 17b arranged in a comb shape in the Y-axis direction are arranged on the second tool rest 17. The plurality of tools 17b are held on the second tool rest 17 along the X-axis direction with their cutting edges facing the workpiece W. The tools 17b are, for example, turning tools, and machine the front surface of the workpiece W held by the first spindle 11. The plurality of tools 15b and the plurality of tools 17b are arranged so that their cutting edges face each other in the X-axis direction. The second tool unit 18 is a cross drill device located above the tool 17b. The second tool unit 18 is located in correspondence with the first tool unit 16 in the X-axis direction. The second tool unit 18 is provided with a plurality of rotary tools 18a for machining the protruding cylindrical portion on the front of the workpiece W. The plurality of rotary tools 18a are arranged vertically in a comb-like pattern, with their respective tips facing the workpiece W along the X-axis. 3, a second comb tool 17T including a tool 17b and a rotary tool 18a is attached to the second tool rest 17. The tool 17b and the rotary tool 18a may be spaced apart in the Z-axis direction. In addition, a fixed tool 18b, which is, for example, a drill, and a rotary tool 18c, which is, for example, a drill, are arranged along the Z axis so that their respective tips face the second spindle unit 20. After the workpiece W is transferred from the first spindle 11 to the second spindle 21, the fixed tool 18b and the rotary tool 18c machine the end face portion of the back surface of the workpiece W. The second tool unit 18, which includes a rotary tool 18a for front processing and a fixed tool 18b and rotary tool 18c for back processing, is preferably provided on the tool post on the side closer to the operator so that work such as tool replacement can be easily performed. The second tool unit 18 also includes a motor 18M that rotates the rotary tools 18a and 18c under the control of the control unit 300. Therefore, the rotary tools 18a and 18c are rotationally driven by the single motor 18M.

[0024] The first tool post 15 and the second tool post 17 are configured as independent opposing tool posts by the first tool post movement mechanism 31X and the first tool post movement mechanism 32Y, and the second tool post movement mechanism 41X and the second tool post movement mechanism 42Y. The reason why the movement directions of the first tool post 15 and the second tool post 17 are set to two axes, the X-axis and the Y-axis, is that if the first main spindle 11 is fixed and the first tool post 15 and the second tool post 17 are moved in the Z-axis direction, they will move in three axes, and errors due to the movement will accumulate, which could result in a decrease in machining accuracy.

[0025] 1 to 3, each part of the machine tool 1 operates under the control of a control unit 300. The control unit 300 controls the first spindle unit 10, the second spindle unit 20, the first spindle moving mechanism 13Z, the second spindle moving mechanism 23Z, the second spindle moving mechanism 24X, the first tool post moving mechanism 31X, the first tool post moving mechanism 32Y, and the first tool unit 16 for the first tool post 15, and the second tool post moving mechanism 41X, the second tool post moving mechanism 42Y, and the second tool unit 18 for the second tool post 17. As a numerical control device for tools, it functions in two systems, one for the first tool post 15 and the other for the second tool post 17. The control unit 300 includes, for example, a CPU (Central Processing Unit) not shown, a ROM (Read Only Memory) that stores a program that defines the procedure of processing by the CPU, and the like. The program is an NC program, which includes command codes for the feed rate and rotation speed of the workpiece (spindle), the type of tool used for machining, and the coordinate position of the tool.

[0026] Next, the structure of the second tool unit 18 will be described in more detail with reference to FIGS. 4(a) to 4(c).

[0027] As shown in FIG. 4(c), a motor 18M is attached to the housing 100 along the X-axis. A tool holder such as a shaft 107 and a gear such as a bevel gear 102 are also attached to the housing 100. A spur gear 104 is fitted to the outer peripheral surface of a motor shaft 103 that is aligned with the X-axis of the motor 18M. A spur gear 105 is fitted to each of shafts 107 that are rotatably supported and have a plurality of rotary tools 18a attached thereto, also extending along the X-axis. The gear 104 meshes with one of the plurality of gears 105, and the gears 105 for the shafts 107 that are aligned in a row mesh with the adjacent gear 105.

[0028] Furthermore, a bevel gear 102, which extends along the X-axis like the motor shaft 103 of the motor 18M, meshes with a gear 104 at a spur gear near one end. The other end of the bevel gear 102 is a bevel gear, which meshes with a bevel gear at one end of a bevel gear 101 extending along the Z-axis, as shown in FIG. 4(b). The longitudinal center of the bevel gear 101 is a spur gear, which meshes with one of the spur gears 106 fitted to each of the shafts 108 to which the rotary tool 18c is attached and rotatably supported, as shown in FIG. 4(a). The gears 106 for the multiple shafts 108 aligned in a row mesh with the adjacent gears 106.

[0029] In the second tool unit 18 configured as described above, when the motor 18M is rotated under the control of the control unit 300, the plurality of rotary tools 18a and the plurality of rotary tools 18c are rotated via gears and shafts. In this way, by driving and rotating the rotary tools 18a and 18c with the single motor 18M, the number of motors can be reduced, thereby reducing costs.

[0030] Next, various methods for machining the workpiece W will be described with reference to Figures 5(a) to 5(e). The first workpiece W1 to be machined is held by the first spindle 11 in Figure 1, and the second workpiece W2 is held by the second spindle 21. After being machined, the product is received by a workpiece separator (not shown) and then transported to the outside of the machine tool 1 by a workpiece conveyor (not shown).

[0031] 5(a) shows an example of balance turning. In this process, the workpiece W is rotated by the first spindle 11 while the first spindle movement mechanism 13Z feeds the workpiece W in the Z-axis direction. The first workpiece W1 is rough-machined with the tool 17b, and simultaneously finished with the tool 15b. It is not necessary to perform both processes simultaneously.

[0032] Fig. 5(b) shows an example of simultaneous cross machining. In this machining, the rotation of the workpiece W by the first spindle 11 is stopped, and the workpiece W is not fed in the Z-axis direction. The rotating tool 16a and the opposing rotating tool 18a each perform drilling or other operations on the first workpiece W1. By performing simultaneous machining using both opposing rotating tools, the machining time can be shortened.

[0033] 5(c) shows another example of simultaneous cross machining. In this machining, the rotation of the workpiece W by the first spindle 11 is stopped, and the workpiece W is fed in the Z-axis direction. In this machining, the rotary tool 16a and the rotary tool 18a are end mills, not drills. The rotary tool 16a and the opposing rotary tool 18a each perform milling on the first workpiece W1.

[0034] 5(d) shows an example of overlap machining. In this machining, the first workpiece W1 is rotated by the first spindle 11, fed in the Z-axis direction by the first spindle moving mechanism 13Z, and subjected to turning or other machining on the first workpiece W1 by the tool 15b. When the front surface machining is completed, the second spindle 21 receives the workpiece W that has been front-surface machined from the first spindle 11. After receiving the workpiece W, the second spindle 21 moves in the XZ directions to make the second workpiece W2 face 18c. To machine the workpiece W2, the second spindle 21 is moved in the Z-axis direction by the second spindle moving mechanism 23Z while rotating the rotary tool 18c, and the back surface machining is performed on the second workpiece W2 by the rotary tool 18c. A second tool unit 18 equipped with rotary tools for front and back machining is provided on either the front or rear tool post. Therefore, after the first spindle 11 has machined the front side of the workpiece W, the second spindle 21 to which the workpiece W has been handed over can immediately machine the back side, shortening the movement time and shortening the machining time. In addition, complex machining can be performed by using different tools for each tool post.

[0035] Figure 5(e) shows the same as Figure 5(d) regarding the machining of the first workpiece W1, but shows that the second tool unit 18, which is not used to machine the first workpiece W1, moves in the X-axis direction indicated by the arrow during machining of the first workpiece W1. This allows the rotary tool 18a, for example, as shown in Figure 5(b), to be prepared while the first workpiece W1 is being machined by the tool 15b. Because the first tool rest 15 and the second tool rest 17 are independent opposing tool rests, it is possible to eliminate tool change time as described above. On the other hand, with a non-independent, integrated opposing tool rest, for example, while a workpiece W is being machined with a tool on the front tool rest, it is not possible to move the tool on the rear tool rest that will be used for machining next, so the tool must be changed after the workpiece is machined, which increases the machining time.

[0036] (effect) According to the embodiment described above, the following effects are achieved. (1) In the above embodiment, the conventional rear tool rest is eliminated, and instead, rotary tools for front and rear machining (rotary tool 18a, rotary tool 18c) are mounted on the front tool rest (second tool rest 17) of the independently opposed tool rest. This allows for a machine tool that can be configured simply. In particular, even with a two-path control numerical control device, simultaneous machining of the front tool rest and the rear tool rest, and simultaneous machining of the front side of the rear tool rest and the rear side of the front tool rest are possible. In addition, by eliminating the rear tool post, chips are less likely to accumulate during rear machining. In addition, it is easier for the operator to see the tip of the spindle (machining point) and to set tools on the front and rear tool posts. Furthermore, by moving the first spindle 11 along the Z-axis direction using the first spindle moving mechanism 13Z, the accumulation of errors caused by the tool post also moving in the Z-axis direction is prevented, and workpieces W ranging from long to short can be accommodated. Furthermore, as shown in the above embodiment, a wide variety of rotary tools can be used, so that even workpieces with complex shapes can be machined in a short time.

[0037] (2) In the above embodiment, the second tool unit 18 equipped with rotary tools for front and back machining is provided on the front tool rest, that is, the tool rest on the side closer to the operator. The second tool unit 18 is located closer to the operator, making it easier to perform tasks such as tool replacement.

[0038] (3) In the above embodiment, in the second tool unit 18, the rotary tool 18a for front surface machining and the rotary tool 18c for back surface machining are each rotationally driven by one motor 18M. Conventionally, the rotary tool for the front side and the rotary tool for the back side processing are located in different places, and two motors are used to drive the rotary tools, but in the above embodiment, this can be reduced to one, which reduces costs. Furthermore, conventionally, in order to perform complex machining, the rear tool post is equipped with a function for moving in the Y-axis direction, but in the above embodiment, the Y-axis function of the second tool unit 18 is shared with the Y-axis function of the second tool post 17, thereby eliminating the need for a Y-axis motor for the rear tool post and reducing costs. This means that a total of two motors can be eliminated.

[0039] (4) In the above embodiment, by providing the rotary tool 16a and the rotary tool 18a on the front and rear tool rests, overlapping machining (simultaneous machining) can be performed, shortening the machining time. In addition, complex machining such as drilling and milling can be performed.

[0040] (5) In the above embodiment, the first tool rest 15 and the second tool rest 17 are numerically controlled by two-system control, and the control unit 300 is provided as a numerical control device that processes the workpiece W with each tool. Previously, a processing system was required for each of the three tool rests (front tool rest, rear tool rest, and back tool rest), which required three numerical control systems.As a result, a program was required for each tool rest, and previously there were three programs. In contrast to this, in this embodiment, a function equivalent to that of a conventional back tool rest is mounted on the second tool rest 17, which is the front tool rest, as a second tool unit 18 equipped with rotary tools for front and back machining. Therefore, there are two tool rests, the front tool rest and the rear tool rest, and two systems of numerical control device may be used. Although a program is required for each tool post, in this embodiment only two programs are required, which reduces the time required to create programs and makes debugging programs easier than before.

[0041] The present disclosure is not limited to the above-described embodiments and drawings. Modifications (including deletion of components) may be made as appropriate within the scope of the present disclosure. An example of such a modification is described below.

[0042] (Variation) Many types of tools other than the drill and end mill of the above embodiment may be attached to the first tool unit 16 and the second tool unit 18. Also, tools equivalent to the fixed tool 18b and the rotary tool 18c may be attached to the first tool unit 16.

[0043] In the first tool rest 15 and the second tool rest 17, the types and arrangement of tools on the tool rests may be other than those in the above embodiment and are arbitrary.

[0044] In addition to the rotating tool 16a and the rotating tool 18a of the above embodiment, for example, fixed tools may be attached to the first tool unit 16 and the second tool unit 18. This increases the number of tools, enabling a wide variety of machining operations. Also, the first tool unit 16 may be equipped with a tool having the same configuration as the second tool unit 18.

[0045] It is sufficient that the workpiece W and the blade move relatively. Therefore, for example, in addition to the first spindle movement mechanism 13Z, a mechanism for moving each of the first tool rest 15 and the second tool rest 17 in the Z-axis direction may be used.

[0046] In the above embodiment, it is described that the first comb tool 15T including the tool 15b and the rotary tool 16a is provided on the first tool rest 15. It is also described that the second comb tool 17T including the tool 17b and the rotary tool 18a is provided on the second tool rest 17. Here, the first comb tool 15T may be configured to include only either the tool 15b or the rotary tool 16a, or one or both of the tool 15b and the rotary tool 16a may be configured to be a single tool. The second comb tool 17T may also be configured to be composed of only either the tool 17b or the rotary tool 18a, or one or both of the tool 17b and the rotary tool 18a may be configured to be a single tool. [Explanation of symbols]

[0047] 1...machine tool, 10...first spindle unit, 11...first spindle, 12...first spindle stock, 13a...support base, 13b...ball screw, 13c...bearing, 13d...bearing, 13e...nut, 13M...motor, 13Z...first spindle movement mechanism, 14...workpiece support portion, 14a...guide bush, 15...first tool post, 15b...tool, 15c...drill holder, 15T...first gang tool, 16...first Tool unit, 16a... rotary tool (third rotary tool), 16M... motor, 17... second tool rest, 17b... tool, 17T... second gang tool, 18... second tool unit, 18a... rotary tool (first rotary tool), 18b... fixed tool, 18c... rotary tool (second rotary tool), 18M... motor, 20... second spindle unit, 21... second spindle, 22... second spindle stock, 23a... support base, 2 3b...ball screw, 23c...bearing, 23d...bearing, 23e...nut, 23M...motor, 23Z...second spindle movement mechanism, 24a...support base, 24b...ball screw, 24c...bearing, 24d...bearing, 24e...nut, 24g...rail, 24h...block, 24M...motor, 24X...second spindle movement mechanism, 31M...motor, 31X...first tool post movement mechanism, 32M...motor, 32Y...first Turret movement mechanism, 41M...motor, 41X...second turret movement mechanism, 42M...motor, 42Y...second turret movement mechanism, 50...base, 100...casing, 101...bevel gear, 102...bevel gear, 103...motor shaft, 104...gear, 105...gear, 106...gear, 107...shaft, 108...shaft, 300...control unit, S...bed, W...workpiece, W1...first workpiece, W2...second workpiece

Claims

1. A machine tool for machining a workpiece, a first spindle unit and a second spindle unit that hold and rotate the workpiece; a first tool rest and a second tool rest that are movable independently of each other; Equipped with the first spindle unit moves along the axial direction of the first spindle, the second spindle unit moves along an axial direction of the second spindle and a depth direction intersecting the axial direction of the second spindle, the first tool rest and the second tool rest move along the depth direction and the vertical direction, respectively; a first comb-shaped tool having a plurality of tools arranged in a comb shape in a vertical direction in a direction intersecting an axial direction of the first spindle is provided on the first tool rest; a second gang tool having a plurality of tools arranged in a vertical direction in a comb shape facing the first gang tool and in a direction intersecting the axial direction of the first spindle is provided on the second tool rest; a housing portion is fixed to either the first tool rest or the second tool rest, a first outer surface portion of the housing portion is provided with a plurality of first rotary tools that machine one end portion of the workpiece held by the first spindle so as to rotate around a direction parallel to the depth direction; a second outer surface portion adjacent to the first outer surface portion of the housing portion is provided with a plurality of second rotary tools that machine the other end of the workpiece held by the second spindle so as to rotate around a direction parallel to the axial direction of the second spindle; the plurality of first rotary tools and the plurality of second rotary tools are each rotationally driven by a single motor; the machine tool includes a numerical control device that numerically controls the first tool rest and the second tool rest using dual-system control and processes the workpiece with the first gang tool and the second gang tool, the first comb tool or the second comb tool includes the plurality of first rotary tools, all tools provided on the machine tool are provided directly or indirectly on the first tool rest and the second tool rest, The first tool rest and the second tool rest, on which all the tools are provided, enable simultaneous machining of the workpiece. Machine tools.

2. The housing portion has a substantially box-shaped outer shape, the plurality of outer surface portions of the housing include a third outer surface portion fixed to either the first tool post or the second tool post, and a fourth outer surface portion to which the one motor is attached; The machine tool according to claim 1.

3. In the housing part, adjacent outer surface parts are perpendicular to each other, the fourth outer surface portion faces the first outer surface portion, the output shaft of the motor transmits power to the first rotary tool, the rotation axis of which is parallel to the output shaft of the motor, via a spur gear, and transmits power to the second rotary tool, the rotation axis of which is perpendicular to the output shaft of the motor, via a bevel gear; The machine tool according to claim 2.

4. A plurality of fixed tools are provided adjacent to the plurality of second rotary tools on the second outer surface portion. The machine tool according to any one of claims 1 to 3.

5. The movement of the headstock and tool rest in the machine tool is movement of the first spindle unit in a direction along the axial direction of the first spindle; movement of the second spindle unit in an axial direction of the second spindle and a direction along a depth direction intersecting the axial direction of the second spindle; the first tool rest and the second tool rest are limited to movement only in the depth direction and the vertical direction, respectively; The machine tool according to any one of claims 1 to 4.

6. of the first tool rest and the second tool rest, the tool rest facing the tool rest equipped with the plurality of first rotary tools is equipped with a third rotary tool whose orientation is fixed in a direction intersecting an axial direction of the first spindle and facing the plurality of first rotary tools of the workpiece; The machine tool according to any one of claims 1 to 5.

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