Additional tool magazine device and machine tool

Abstract

To provide an additional tool magazine device and a machine tool easily enabling an increase in the number of tools which can be housed.SOLUTION: An additional tool magazine device 100 is comprised in a machine tool 1 including: standard tool magazine portions 60A, 60B housing a plurality of tools 70; and a tool spindle unit 50 to which any one of the plurality of tools 70 housed in the standard tool magazine portions 60A, 60B is attached, and which machines a workpiece W using the attached tool 70. The additional tool magazine device 100 comprises: additional tool magazine portions 110A, 110B housing the plurality of tools 70; and second tool conveyance devices 140A, 140B conveying any one of the plurality of tools 70 housed in the additional tool magazine portions 110A, 110B to the standard tool magazine portions 60A, 60B.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an additional tool magazine device and a machine tool. [Background technology]

[0002] For example, the lathe described in Patent Document 1 is provided with a tool magazine that stores the required number of tools that can be attached to the tool spindle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4477525 Summary of the Invention [Problem to be solved by the invention]

[0004] In the configuration described in Patent Document 1, the number of tools that can be accommodated in the tool magazine may be insufficient to realize a variety of machining operations.

[0005] The present invention has been made in view of the above-mentioned circumstances, and has an object to provide an expansion tool magazine device and a machine tool that can easily increase the number of tools that can be stored. [Means for solving the problem]

[0006] In order to achieve the above object, an additional tool magazine device according to a first aspect of the present invention is an additional tool magazine device provided in a machine tool having a standard tool magazine section that stores a plurality of tools, and a tool spindle unit to which any of the plurality of tools stored in the standard tool magazine section is attached and which processes a workpiece with the attached tool, the additional tool magazine device comprising: an additional tool magazine section that stores a plurality of additional tools; and a tool transport device that transports any of the plurality of additional tools stored in the additional tool magazine section to the standard tool magazine section. A plurality of the additional tool magazine units are provided, each holding the additional tool on its outer periphery, supported rotatably around a rotation axis, and arranged along the rotation axis, and one tool transport device is provided for each of the plurality of additional tool magazine units. . In addition, an additional tool magazine device according to a second aspect of the present invention is an additional tool magazine device provided on a machine tool having a standard tool magazine section that stores a plurality of tools, and a tool spindle unit to which any of the plurality of tools stored in the standard tool magazine section is attached and which processes a workpiece using the attached tool, and the additional tool magazine device comprises: an additional tool magazine section that stores a plurality of additional tools; and a tool transport device that transports any of the plurality of additional tools stored in the additional tool magazine section to the standard tool magazine section, and there are provided two additional tool magazine sections, each holding an additional tool on its outer periphery, supported rotatably around a rotation axis, and aligned along the rotation axis, and there is provided one tool transport device for each of the two additional tool magazine sections.

[0007] In order to achieve the above object, the present invention 3 The machine tool according to the above aspect comprises the additional tool magazine device, the standard tool magazine section, the tool spindle unit, and a spindle that holds the workpiece. [Effects of the Invention]

[0008] According to the present invention, the number of tools that can be stored in the expansion tool magazine device and machine tool can be easily increased. [Brief explanation of the drawings]

[0009] [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] 4 is a side view including a partial cross section of a second tool transport device according to an embodiment of the present invention. FIG. [Figure 4] 1 is a side view including a partial cross section of a first tool transport device according to an embodiment of the present invention. [Figure 5] 1 is a plan view of an additional tool magazine device according to an embodiment of the present invention; [Figure 6] 1 is a front view of an additional tool magazine device according to an embodiment of the present invention; [Figure 7] FIG. 2 is a front view of a standard tool magazine unit, an additional tool magazine unit, and a second tool transport device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] 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 and 2, machine tool 1, which is a turning center, includes a bed S, which is a base for the entire machine tool 1, a first spindle unit 10 having a first spindle 11, a first spindle movement mechanism 13Z, a guide bush 18, a second spindle unit 20 having a second spindle 21, a second spindle movement mechanism 25Z, a turret 30, turret movement mechanisms 35X, 35Z, a tool spindle unit 50, tool movement mechanisms 42X, 42Y, 42Z, a tool rotation mechanism 45, a standard tool storage and exchange system 61, an additional tool magazine device 100, and a control unit 300. 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 depth direction perpendicular to the Y-axis and Z-axis directions is defined as the X-axis direction.

[0011] 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. A workpiece rotation motor (not shown) that rotates the first spindle 11 is built into the first headstock 12.

[0012] The first spindle moving mechanism 13Z moves the first spindle unit 10 in the Z-axis direction. The guide bush 18 rotatably supports the tip end side of the workpiece W held by the first spindle 11.

[0013] 2, the second spindle unit 20 is provided at a position facing the first spindle unit 10 in the Z-axis direction. The second spindle unit 20 includes a second spindle 21 that holds the other end of the workpiece W, and a second headstock 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 headstock 22. The second spindle moving mechanism 25Z moves the second spindle unit 20 in the Z-axis direction.

[0014] A tool 70 for machining a workpiece W held by the first spindle 11 or the second spindle 21 is attached to the tool spindle unit 50. The tool 70 is a drill, a cutting tool, an end mill, or the like. When a rotary tool such as a drill is attached as the tool 70, the tool spindle unit 50 rotates this rotary tool. When a fixed tool such as a cutting tool is attached as the tool 70, the tool spindle unit 50 holds this fixed tool so that it cannot rotate.

[0015] The tool movement mechanism 42X moves the tool spindle unit 50 in the X-axis direction (X1-axis direction). The tool movement mechanism 42Y moves the tool spindle unit 50 in the Y-axis direction (Y1-axis direction). The tool movement mechanism 42Z moves the tool spindle unit 50 in the Z-axis direction (Z1-axis direction).

[0016] 1 and 2, the tool rotation mechanism 45 rotates the tool spindle unit 50 about a rotation axis J1. The rotation axis J1 extends along the Y-axis direction. By rotating the tool spindle unit 50 about the rotation axis J1, the orientation of the tool 70 attached to the tool spindle unit 50 with respect to the workpiece W can be adjusted. This enables a variety of machining operations on the workpiece W.

[0017] 2, turret 30 is configured to be able to hold a plurality of tools (not shown) for machining workpiece W held by first spindle 11. Turret 30 is supported rotatably about rotation axis 31C, which is a central axis extending along the Z-axis direction. The turret movement mechanism 35X moves the turret 30 in the X-axis direction (X2-axis direction). The turret movement mechanism 35Z moves the turret 30 in the Z-axis direction (Z2-axis direction). The slide table 35T of the turret movement mechanism 35Z and the slide table 25T of the second spindle movement mechanism 25Z move in the Z-axis direction along a common rail 29.

[0018] The first spindle moving mechanism 13Z, the second spindle moving mechanism 25Z, the tool moving mechanisms 42X, 42Y, 42Z, and the turret moving mechanisms 35X, 35Z each have a motor, a ball screw, and a nut, and are configured to convert the rotational force of the motor into linear motion using the ball screw and the nut, thereby linearly moving the corresponding first spindle unit 10, second spindle unit 20, tool spindle unit 50, or turret 30.

[0019] 1 and 2, the standard tool storage and exchange system 61 stores a plurality of tools 70 and exchanges one of the stored tools 70 with the tool 70 attached to the tool spindle unit 50. The standard tool storage and exchange system 61 is positioned to be aligned in the Z-axis direction with the tool moving mechanisms 42X, 42Y, 42Z. In this example, the standard tool storage and exchange system 61 is positioned to the side of the second spindle unit 20 in the X-axis direction and to the rear of the second spindle unit 20. In this example, the standard tool storage and exchange system 61 is installed in the machine tool 1 as standard equipment.

[0020] As shown in FIG. 2, the standard tool storage and exchange system 61 includes standard tool magazine units 60A and 60B, a drive unit 63, a tool exchange device 80, and a first tool transfer device 90. Each of the standard tool magazine units 60A, 60B accommodates a plurality of tools 70. Each of the standard tool magazine units 60A, 60B has an annular shape. As shown in FIG. 6, the standard tool magazine units 60A, 60B are provided with a plurality of grippers 62 on the outer periphery of the standard tool magazine units 60A, 60B, each capable of holding a tool holder 70h of a tool 70. The grippers 62 are aligned along the circumferential direction of the standard tool magazine units 60A, 60B and are generally U-shaped, opening outward in the radial direction of the standard tool magazine units 60A, 60B, so as to be able to hold the tool holder 70h of the tool 70. The grippers 62 are elastically deformable, and clamp the tool holder 70h by this elastic force. As shown in FIG. 5, the axial direction (longitudinal direction) of the tool 70 extends along the X-axis direction when the tool 70 is held by the grippers 62.

[0021] As shown in Fig. 6, an address is assigned to each gripper 62 in the standard tool magazine units 60A, 60B as a unique identification number. A predetermined type of tool 70 is stored in each address. One empty gripper 62k is assigned to each of the two (two stages) standard tool magazine units 60A, 60B. The empty gripper 62k is associated with one of the addresses and is used to transfer the tool 70 between the standard tool magazine units 60A, 60B and the additional tool magazine units 110A, 110B. In this example, the standard tool magazine units 60A and 60B each have 30 grippers 62, and when one free gripper 62k is set in each, a total of 58 tools 70 can be accommodated. In Figure 6, one standard tool magazine unit 60A, 60B is shown as having two empty grippers 62k, but in reality, there is one empty gripper 62k in each of the two standard tool magazine units 60A, 60B.

[0022] 2, the standard tool magazine units 60A, 60B are supported rotatably about a rotation axis J2 and are aligned along the rotation axis J2. The rotation axis J2 extends along the X-axis direction and passes through the centers of the standard tool magazine units 60A, 60B. The drive unit 63 is, for example, a motor, and rotates the standard tool magazine units 60A and 60B around the rotation axis J2.

[0023] 1, the first tool transport device 90 transports tools 70 between the standard tool magazine units 60A, 60B and the tool changer 80. More specifically, the first tool transport device 90 transports the tools 70 to be used in the next machining from the standard tool magazine units 60A, 60B to the tool changer 80, and transports the tools 70 used in the previous machining from the tool changer 80 to the standard tool magazine units 60A, 60B. The first tool transport device 90 is located between the standard tool magazine units 60A, 60B and the tool changer 80 in the Z-axis direction.

[0024] As shown in FIG. 6, the first tool transport device 90 includes a tool holding unit 91, a tool moving mechanism 92X that moves the tool holding unit 91 in the X-axis direction, and a tool moving mechanism 92Z that moves the tool holding unit 91 in the Z-axis direction. As shown in FIG. 4, the tool holding portion 91 holds the tool holder 70h of the tool 70 so that the axial direction of the tool 70 is along the X-axis direction. As shown in FIG. 6, the tool moving mechanism 92Z enables the tool holding unit 91 to move between an exchange position P3 of the standard tool magazine units 60A, 60B and an exchange position P5 of the tool exchange device 80. The tool moving mechanism 92X enables the tool holding unit 91 to move between the exchange positions P3 of the two standard tool magazine units 60A, 60B.

[0025] As shown in FIG. 4, the tool moving mechanism 92X includes a motor 92a, a belt 92b, pulleys 92c and 92d, a threaded shaft 92e, and a nut 92f. The pulley 92c is fixed to the output shaft of the motor 92a so as to be rotatable together with the output shaft. The pulley 92d is fixed to the end (the right end in FIG. 4) of the threaded shaft 92e so as to be rotatable together with the threaded shaft 92e. The belt 92b is wound around the pulleys 92c and 92d, which are arranged along the Y-axis direction. The nut 92f is threadedly engaged with the outer periphery of the threaded shaft 92e. When the output shaft of the motor 92a rotates, the rotational force is transmitted to the threaded shaft 92e via the pulleys 92c and 92d and the belt 92b. As a result, the threaded shaft 92e rotates, and the nut 92f moves in the X-axis direction along the threaded shaft 92e together with the tool holder 91.

[0026] 1, the tool changer 80 exchanges the tool 70 held by the tool spindle unit 50 (the tool 70 used in the previous machining) with the tool 70 held by the first tool transporter 90 (the tool 70 to be used in the next machining). The tool changer 80 is located between the first tool transporter 90 and the tool spindle unit 50 in the Z-axis direction.

[0027] As shown in FIG. 6, the tool changer 80 includes an arm 81, an arm support unit 83, a drive unit 82, a gear mechanism (not shown), and an arm movement mechanism (not shown). The arm support part 83 supports the arm 81 so that it can rotate about a rotation axis 81C. The drive part 82 is, for example, a motor, and rotates the arm 81 via a gear mechanism (not shown) provided inside the arm support part 83. The rotation axis 81C extends along the thickness direction and the X-axis direction of the arm 81 and passes through the center position of the arm 81. The arm 81 has a generally rectangular plate shape. The arm 81 includes a first holding portion 81a and a second holding portion 81b located at both ends in the longitudinal direction of the arm 81. The first holding portion 81a and the second holding portion 81b have grooves into which the tool holder 70h of the tool 70 fits as the arm 81 rotates. The arm 81 is rotated by the drive unit 82 around the rotation axis 81C between a horizontal position indicated by the solid line in FIG. 6 and a vertical position indicated by the two-dot chain line in FIG. 6. When the arm 81 is in the horizontal position, the longitudinal direction of the arm 81 is along the Z-axis direction. When the arm 81 is in the horizontal position, one of the first holding portion 81a and the second holding portion 81b (the second holding portion 81b in FIG. 6) is located at an exchange position P5, and the other of the first holding portion 81a and the second holding portion 81b (the first holding portion 81a in FIG. 6) is located at an exchange position P6. When the arm 81 is in the vertical position, the longitudinal direction of the arm 81 is along the Y-axis direction. The arm 81 can be moved forward and backward along the rotation axis 81C by an arm movement mechanism (not shown).

[0028] As shown in Figure 6, the additional tool magazine device 100 stores a plurality of tools 70 and exchanges the tools 70 with the standard tool magazine units 60A, 60B. The additional tool magazine device 100 is located behind (to the right in Figure 1) and below the standard tool storage and exchange system 61. In this way, the standard tool magazine units 60A, 60B and the additional tool magazine units 110A, 110B are arranged at different heights, allowing the machine tool 1 to be compact even when the additional tool magazine device 100 is installed. In this example, the additional tool magazine device 100 is configured to be retrofittable to the machine tool 1 as optional equipment.

[0029] As shown in Figure 5, the additional tool magazine device 100 includes two (two stages) additional tool magazine sections 110A, 110B, second tool transport devices 140A, 140B, and a drive section 111, and as shown in Figure 6, a magazine support section 120, a base section 125, a transport device support section 127, a bottom plate section 130, multiple caster sections 131, and legs 132.

[0030] The additional tool magazine units 110A, 110B are configured similarly to the standard tool magazine units 60A, 60B, and the drive unit 111 is configured similarly to the drive unit 63. The additional tool magazine units 110A, 110B are equipped with a plurality of grippers 112 similar to the grippers 62 of the standard tool magazine units 60A, 60B. As shown in FIG. 5, the additional tool magazine unit 110A is positioned to be aligned with the standard tool magazine unit 60A in the Z-axis direction, and the additional tool magazine unit 110B is positioned to be aligned with the standard tool magazine unit 60B in the Z-axis direction. The additional tool magazine units 110A and 110B are rotated by a drive unit 111 around a rotation axis J3.

[0031] 6, the bottom plate 130 has a plate shape extending along the X-axis and Z-axis directions. A base 125 is installed on the upper surface of the bottom plate 130, and the magazine support 120 and the transport device support 127 are fixed to the upper surface of the base 125. The magazine support 120 supports the additional tool magazines 110A and 110B so that they can rotate about the rotation axis J3. The transport device support 127 supports the second tool transport devices 140A and 140B. The caster parts 131 are attached to the underside of the bottom plate part 130 and rotate when the additional tool magazine device 100 is moved. The multiple legs 132 are attached to the underside of the bottom plate 130. As shown enlarged in the lower part of FIG. 6, the legs 132 include a threaded shaft 132a, a hexagonal portion 132b, an adjuster 132c, and a nut 132d. The threaded shaft 132a extends along the Y-axis direction and has a thread formed on its outer periphery. The upper end of the threaded shaft 132a is screwed onto the underside of the bottom plate 130. The nut 132d is attached to the outer periphery of the upper end of the threaded shaft 132a and fixes the threaded shaft 132a to the bottom plate 130 to prevent it from loosening relative to the bottom plate 130. The adjuster 132c allows the length of the legs 132 in the Y-axis direction to be adjusted. The adjuster 132c is attached to the lower end of the threaded shaft 132a so as to contact the installation surface G. Hexagonal portion 132b is a portion that is rotated with a tool such as a wrench, and is fixed to the upper part of adjuster 132c. When rotated, hexagonal portion 132b rotates integrally with adjuster 132c and moves in the Y-axis direction along threaded shaft portion 132a. In this example, a total of four legs 132 are provided. Although only the first leg 132 is shown in Fig. 6, the second leg 132 is positioned so as to overlap the first leg 132 in the X-axis direction, and the third and fourth legs 132 are provided so as to overlap the caster part 131 on the right side of Fig. 6 in the X-axis direction. Here, a method for installing the additional tool magazine device 100 will be described. When transporting the extension tool magazine device 100, the adjuster 132c is positioned closer to the bottom plate 130 than the lower ends of the caster parts 131, and each caster part 131 is brought into contact with the installation surface G. In this state, each caster part 131 is rotated while the bottom plate part 130 is brought closer to the bed S. In this way, by using each caster part 131, the extension tool magazine device 100 can be easily moved. Next, the hexagonal portion 132b is rotated by a tool, causing the adjuster 132c to come into contact with the installation surface G, and the bottom plate portion 130 moves upward. At this time, the caster portions 131 are separated from the installation surface G. The position of the bottom plate portion 130 in the Y-axis direction (up and down direction) can be adjusted by the amount and direction of rotation of the hexagonal portion 132b and the adjuster 132c. This position adjustment aligns the positions of multiple screw holes (not shown) on the side of the bed S with multiple bolt holes (not shown) in the bottom plate portion 130. Then, with this alignment in place, the bottom plate portion 130 and the bed S are fixed together with multiple bolts (not shown). Finally, the screw shaft portion 132a is fixed to the bottom plate portion 130 with the nut 132d. In this way, the legs 132 and the caster portions 131 facilitate the retrofitting of the additional tool magazine device 100.

[0032] 6, the second tool transport devices 140A, 140B transport tools 70 between the standard tool magazine units 60A, 60B and the additional tool magazine units 110A, 110B. Specifically, the second tool transport devices 140A, 140B transport tools 70 to be used in the next machining from the additional tool magazine units 110A, 110B to the standard tool magazine units 60A, 60B, and transport tools 70 used in the previous machining from the standard tool magazine units 60A, 60B to the additional tool magazine units 110A, 110B.

[0033] As shown in FIGS. 3 and 5, the second tool transport devices 140A and 140B include a tool holder 141, a slide movement mechanism 142, and a movement mechanism 143. The tool holding unit 141 is configured to be movable in the X-axis direction by a moving mechanism 143. The tool holding unit 141 is configured to hold the tool holder 70h of the tool 70 held in any of the tool magazine units 60A, 60B, 110A, and 110B by being moved forward by the moving mechanism 143 so as to be pushed into the tool holder 70h. The moving mechanism 143 is a fluid cylinder, for example, an air cylinder. Note that the moving mechanism 143 is not limited to a fluid cylinder, and may be composed of a motor, a ball screw, and a nut, or may be composed of a magnetic actuator. The slide movement mechanism 142 moves the tool holding unit 141 between an exchange position P1 for the additional tool magazine units 110A and 110B and an exchange position P2 for the standard tool magazine units 60A and 60B. 7, the replacement position P1 of the additional tool magazine units 110A, 110B is located corresponding to the gripper 112 that is closest to the standard tool magazine units 60A, 60B among the multiple grippers 112. The replacement position P2 of the standard tool magazine units 60A, 60B is located corresponding to the gripper 62 that is closest to the additional tool magazine units 110A, 110B among the multiple grippers 62. The movement direction of the tool holding unit 141 between the replacement positions P1, P2 is set, for example, in a direction inclined with respect to the Z-axis direction so that the height increases as it approaches replacement position P2 from replacement position P1. 6, the standard tool magazine units 60A, 60B have an exchange position P3 in addition to the exchange position P2. The exchange position P3 is located corresponding to the gripper 62 that is closest to the first tool transport device 90 among the multiple grippers 62. The exchange positions P1, P2, and P3 are located at the same positions regardless of the rotation of the tool magazine units 60A, 60B, 110A, and 110B.

[0034] As shown in FIGS. 3 and 5, the slide movement mechanism 142 includes a slide table 144 and a main body 146 having a table support 145. The table support part 145 is located on the upper surface of the main body part 146 and is formed to extend along the Z-axis direction. The slide table 144 is configured to be movable along the table support part 145 together with the tool holding part 141. Between the slide table 144 and the table support part 145, grooves (not shown) are formed to accommodate a plurality of balls (not shown) that are aligned along the movement direction of the slide table 144. When the slide table 144 moves relative to the table support part 145, these balls rotate, allowing the slide table 144 to move smoothly without tilting relative to the table support part 145. The main body 146 is made up of a fluid cylinder, such as an air cylinder, that reciprocates the slide table 144 relative to the table support 145. Note that the main body 146 is not limited to a fluid cylinder, and may also have a configuration including a motor, a ball screw, and a nut.

[0035] 1, the control unit 300 controls the first spindle unit 10, the first spindle movement mechanism 13Z, the second spindle unit 20, the second spindle movement mechanism 25Z, the turret movement mechanisms 35X, 35Z, the tool spindle unit 50, the tool movement mechanisms 42X, 42Y, 42Z, the tool rotation mechanism 45, the standard tool storage and exchange system 61, and the additional tool magazine device 100. The control unit 300 includes, for example, a CPU (Central Processing Unit) not shown, and a ROM (Read Only Memory) that stores a program that defines the processing procedures to be performed by the CPU.

[0036] The control unit 300 executes the machining process in accordance with a pre-created NC (Numerical Control) program. As an example of this machining process, first, a workpiece W is supplied to the first spindle 11 by a workpiece supply device (not shown). Then, the workpiece W held by the first spindle 11 is machined by the tool 70 of the tool spindle unit 50 or the tool of the turret 30. After this machining is completed, the workpiece W is transferred from the first spindle 11 to the second spindle 21, and the workpiece W held by the second spindle 21 is machined by the tool 70 of the tool spindle unit 50. After this machining is completed, the workpiece W is discharged into a workpiece catcher (not shown), and this discharged workpiece W is then discharged outside the machine on a belt conveyor (not shown). This machining process is repeatedly performed each time a workpiece W is supplied.

[0037] The following describes a processing procedure when, as part of a machining process, machining is performed using the tools 70 stored in the standard tool magazines 60A, 60B. At the start of the part of the machining process described below, the workpiece W held by the first spindle 11 or the second spindle 21 is being machined by the tools 70 attached to the tool spindle unit 50, and the arm 81 is in the vertical position shown by the two-dot chain line in FIG.

[0038] First, in preparation for machining with the next tool 70 by the tool spindle unit 50, the control unit 300 selects one of the multiple tools 70 housed in the standard tool magazines 60A and 60B and rotates the selected tool 70 to the exchange position P3 via the drive unit 63. Then, the control unit 300 moves the tool holding unit 91 via the tool moving mechanisms 92X and 92Z of the first tool transport device 90 as shown by the two-dot chain line in FIG. 5, thereby inserting the tool holder 70h into the tool holding unit 91 and clamping the tool 70 at the exchange position P3. The tool holding unit 91 then moves to the standby position P4 (see FIG. 6), where it waits until the previous machining is completed. This movement releases the tool 70 from the gripper 62 at the exchange position P3. The standby position P4 is located between the exchange position P3 and the exchange position P5.

[0039] Then, when the previous machining is completed, the control unit 300 moves the tool spindle unit 50 to the changing position P6 via the tool moving mechanisms 42X, 42Y, 42Z. At the same time, it moves the tool holder 91 to the changing position P5. Next, the control unit 300 rotates the arm 81 via the drive unit 82 (see FIG. 6) from the vertical position indicated by the two-dot chain line to the horizontal position indicated by the solid line. As a result, the tool 70 of the tool spindle unit 50 is held by the first holding portion 81a of the arm 81, and the tool 70 of the tool holding unit 91 is held by the second holding portion 81b. In this state, the tool spindle unit 50 switches from a clamped state in which the tool 70 is clamped to an unclamped state in which the clamp is released. Then, the control unit 300 advances the arm 81 in the direction along the rotation axis 81C via the arm movement mechanism (not shown), as indicated by arrow K1 in FIG. 2. As a result, with the arm 81 holding the two tools 70, the two tools 70 are withdrawn from the tool holding unit 91 and the tool spindle unit 50. Then, the control unit 300 rotates the arm 81 by 180° via the drive unit 82. This reverses the relative positions of the two tools 70. Next, the control unit 300 causes the arm 81 to retract in the direction along the rotation axis 81C via the arm movement mechanism (not shown), as indicated by arrow K2 in FIG. 2, thereby inserting the tool holder 70h of the tool 70 into the tool holding unit 91 and the tool spindle unit 50. By inserting the tool holder 70h into the tool holding unit 91, the tool holder 70h is clamped by the tool holding unit 91. Then, the tool spindle unit 50 switches from the unclamped state to the clamped state. Thereafter, the arm 81 is returned to the vertical position. This completes the exchange of the tool 70 to be clamped between the tool holding unit 91 and the tool spindle unit 50. In this state, the tool spindle unit 50 holds the tool 70 to be used in the next machining operation, and the tool holding unit 91 holds the tool 70 used in the previous machining operation. After this tool change, the control unit 300 moves the tool spindle unit 50 and brings the cutting edge of the tool 70 into contact with the workpiece W, thereby performing processing (next processing) of the workpiece W held by the first spindle 11 or the second spindle 21. 6, the control unit 300 positions the gripper 62 (address) of the standard tool magazine unit 60A or the standard tool magazine unit 60B corresponding to the tool 70 used in the previous machining at the exchange position P3, and then moves the tool holding unit 91 from the exchange position P5 to the exchange position P3, thereby returning the tool 70 to the gripper 62 at the exchange position P3. As a result, the tool 70 used in the previous machining is returned to the standard tool magazine unit 60A, 60B. This concludes the description of the processing procedure when machining is performed using the tools 70 housed in the standard tool magazines 60A and 60B.

[0040] Next, a processing procedure will be described for performing machining using the tool 70 stored in the additional tool magazine unit 110B as part of a machining process. In the following description, an example will be described in which the tool 70 stored in the additional tool magazine unit 110B is transported to the tool spindle unit 50 via the second tool transport device 140B, the standard tool magazine unit 60B, the first tool transport device 90, and the tool changer 80.

[0041] First, in preparation for machining with the next tool 70 by the tool spindle unit 50, the control unit 300 selects one of the multiple tools 70 stored in the additional tool magazine unit 110B and rotates the selected tool 70 to the replacement position P1 via the drive unit 111 (see FIG. 5). Then, the control unit 300 rotates the standard tool magazine unit 60B via the drive unit 63 to position the empty gripper 62k of the standard tool magazine unit 60B at the replacement position P2. This brings the empty gripper 62k opposite the selected tool 70 in the additional tool magazine unit 110B.

[0042] Next, the control unit 300 moves the tool holding unit 141 to the replacement position P1 via the slide movement mechanism 142 of the second tool transport device 140B. Thereafter, as shown in FIG. 5, the tool holding unit 141 is moved forward via the movement mechanism 143 to clamp the tool holder 70h of the selected tool 70. Then, as shown by arrow K3 in FIG. 5, the tool holding unit 141 is moved from the replacement position P1 to the replacement position P2 via the slide movement mechanism 142. At this time, the tool holder 70h of the tool 70 is released from the gripper 112 of the additional tool magazine unit 110B and is clamped by an elastic force by the empty gripper 62k of the standard tool magazine unit 60B. Next, the control unit 300 moves the tool holding unit 141 backward via the movement mechanism 143 to separate the tool holding unit 141 from the tool holder 70h of the tool 70. This completes the transport of the tool 70 from the additional tool magazine unit 110B to the standard tool magazine unit 60B by the second tool transport device 140B. After this, as described above, the standard tool magazine unit 60B is rotated so that the tool 70 is at the changing position P3, and the first tool transport device 90 transports the tool 70 from the changing position P3 to the waiting position P4, then to the changing position P5, and the tool 70 is then attached to the tool spindle unit 50 by the tool changer 80. The tool spindle unit 50 machines the workpiece W with the attached tool 70. After this machining is completed, the tool 70 is returned to its original address in the additional tool magazine unit 110B via the tool changer 80, the first tool transport device 90, the standard tool magazine unit 60B, and the second tool transport device 140B, in the opposite direction to the transport path from the standard tool magazine unit 60B to the tool spindle unit 50. This concludes the description of the processing procedure when machining is performed using the tools 70 housed in the additional tool magazine 110B.

[0043] When machining is performed using the tool 70 stored in the additional tool magazine unit 110A, the tool 70 stored in the additional tool magazine unit 110A is transported to the tool spindle unit 50 via the second tool transport device 140A, the standard tool magazine unit 60A, the first tool transport device 90, and the tool changer 80, in the same manner as described above. After machining is completed, the tool 70 attached to the tool spindle unit 50 is returned to its original address in the additional tool magazine unit 110A via the tool changer 80, the first tool transport device 90, the standard tool magazine unit 60A, and the second tool transport device 140A.

[0044] (effect) According to the embodiment described above, the following effects are achieved. (1) The additional tool magazine device 100 is provided on a machine tool 1 having standard tool magazine units 60A, 60B that store a plurality of tools 70, and a tool spindle unit 50 to which any of the plurality of tools 70 stored in the standard tool magazine units 60A, 60B is attached and which machines a workpiece W with the attached tool 70. The additional tool magazine device 100 includes additional tool magazine units 110A, 110B that store a plurality of tools 70 (additional tools), and second tool transport devices 140A, 140B that are an example of a tool transport device that transports any of the plurality of tools 70 (additional tools) stored in the additional tool magazine units 110A, 110B to the standard tool magazine units 60A, 60B. According to this configuration, the number of tools 70 that can be accommodated in the machine tool 1 can be easily increased simply by providing the additional tool magazine units 110A, 110B and the second tool transport devices 140A, 140B. Furthermore, by increasing the number of tools 70 that can be accommodated, it becomes possible to process complex workpieces W using a large number of tools 70, and the number of steps required for changeover can be reduced when producing a wide variety of products in small quantities. Furthermore, by using standard tool magazines 60A, 60B and additional tool magazines 110A, 110B, it is possible to realize the number of tools that two machine tools can accommodate in one machine tool. Also, compared to installing two machine tools, it is only necessary to provide additional tool magazines 110A, 110B in one machine tool, so it does not take up floor space. The additional tool magazine device 100 can be added to an existing machine tool, so there is no need to make major design changes to the bed S or main body cover (not shown) of the machine tool.

[0045] (2) Two additional tool magazine units 110A, 110B (two stages) are provided, each holding a tool 70 on its outer periphery, supported rotatably about the rotation axis J3, and arranged along the rotation axis J3. One second tool transport device 140A, 140B is provided for each of the two additional tool magazine units 110A, 110B. According to this configuration, the two additional tool magazine units 110A, 110B are arranged side by side along the rotation axis J3, so that the additional tool magazine device 100 does not take up floor space. Furthermore, since there is a one-to-one correspondence between the additional tool magazine units 110A, 110B and the second tool transport devices 140A, 140B, the configuration of the second tool transport devices 140A, 140B can be simplified.

[0046] (3) The additional tool magazine device 100 is configured so as to be able to be retrofitted to the machine tool 1. According to this configuration, the additional tool magazine device 100 can be retrofitted to an existing machine tool.

[0047] (4) The second tool transport devices 140A, 140B are fixed so as not to be displaced when the additional tool magazine units 110A, 110B rotate. According to this configuration, the exchange position P1 for transferring tools 70 between the second tool transport device 140A, 140B and the additional tool magazine unit 110A, 110B is fixed, so that the transfer of tools 70 between the second tool transport device 140A, 140B and the additional tool magazine unit 110A, 110B is accurate. Furthermore, the transport device support part 127 that supports the second tool transport devices 140A, 140B and the magazine support part 120 that rotatably supports the additional tool magazine parts 110A, 110B are both fixed to the common base part 125. Therefore, the second tool transport devices 140A, 140B and the additional tool magazine parts 110A, 110B are formed as an integrated unit, making it easy to retrofit the additional tool magazine device 100.

[0048] (5) The machine tool 1 includes an additional tool magazine device 100, standard tool magazine sections 60A and 60B, a tool spindle unit 50, and a first spindle 11, which is an example of a spindle that holds a workpiece W. According to this configuration, the additional tool magazine device 100 can easily increase the number of tools 70 that can be stored.

[0049] 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.

[0050] (Variation) In the above embodiment, two-tiered additional tool magazines 110A, 110B are provided, but the number of tiers in the additional tool magazines 110A, 110B may be one or three or more. Similarly, the number of tiers in the standard tool magazines 60A, 60B may be one or three or more.

[0051] In the above embodiment, the first spindle unit 10 is configured to be movable in the Z-axis direction, but this is not limited thereto. The first spindle moving mechanism 13Z may be omitted, and the first spindle unit 10 may be configured to be immovable in the Z-axis direction.

[0052] In the above embodiment, the number of second tool transport devices 140A, 140B is two, but this is not limiting and the number may be one by adopting a configuration similar to that of the first tool transport device 90. This allows the number of empty grippers 62k in the standard tool magazine units 60A, 60B to be reduced from a total of two in the above embodiment to a total of one. This allows the number of tools 70 that can be stored in the standard tool magazine units 60A, 60B to be increased.

[0053] The types of tools 70 stored in the standard tool magazine units 60A, 60B and the additional tool magazine units 110A, 110B are not limited to those in the above embodiment, and many other types of tools 70 may be stored therein.

[0054] The positional relationship between the standard tool magazines 60A, 60B and the additional tool magazines 110A, 110B is not limited to that in the above embodiment and can be changed as appropriate. For example, in the above embodiment, the standard tool magazines 60A, 60B and the additional tool magazines 110A, 110B are located at different heights, but they may also be located at the same height. Furthermore, the positions of the tool spindle unit 50 and the tool moving mechanisms 42X, 42Y, 42Z are not limited to those in the above embodiment and can be changed as appropriate. The second spindle unit 20 in the above embodiment can be omitted. The turret 30 and the turret moving mechanisms 35X and 35Z in the above embodiment can be omitted. The guide bush 18 in the above embodiment can be omitted. In the above embodiment, the standard tool magazines 60A, 60B and the additional tool magazines 110A, 110B can accommodate a total of 118 tools, but the number of tools that can be accommodated is not limited to this.

[0055] In the above embodiment, the additional tool magazine device 100 is configured to be able to be attached to the machine tool 1 later, but this is not limiting, and the additional tool magazine device 100 may be pre-installed in the machine tool 1. The tool changer 80 and the first tool transporter 90 in the above embodiment may be omitted. In this case, the tool spindle unit 50 may directly transfer the tool 70 to and from the standard tool magazine parts 60A, 60B.

[0056] In the above embodiment, the rotation axes J2, J3 of the standard tool magazine units 60A, 60B and the additional tool magazine units 110A, 110B extend along the X-axis direction, but they may also extend in a direction other than the X-axis direction, for example, along the Y-axis direction or the Z-axis direction. [Explanation of symbols]

[0057] 1...machine tool, 10...first spindle unit, 11...first spindle, 12...first spindle stock, 13Z...first spindle movement mechanism, 18...guide bush, 20...second spindle unit, 21...second spindle, 22...second spindle stock, 25T, 35T...slide table, 25Z...second spindle movement mechanism, 29...rail, 30...turret, 35X, 35Z...turret movement mechanism, 42X, 42Y, 42Z , 92X, 92Z... tool movement mechanism, 45... tool rotation mechanism, 50... tool spindle unit, 60A, 60B... standard tool magazine section, 61... standard tool storage and exchange system, 63, 82, 111, 146... main body section, 62, 112... gripper, 62k... empty gripper, 70... tool, 70h... tool holder, 80... tool exchange device, 81... arm, 81a... first holding section, 81b... second Holding portion, 83...arm support portion, 90...first tool transport device, 91...tool holding portion, 92a...motor, 92b...belt, 92c, 92d...pulley, 92e...screw shaft portion, 92f...nut, 100...additional tool magazine device, 110A, 110B...additional tool magazine portion, 120...magazine support portion, 125...base portion, 127...transport device support portion, 130...bottom plate portion, 131...cap Star portion, 132...leg portion, 140A, 140B...second tool transport device, 141...tool holding portion, 142...slide movement mechanism, 143...movement mechanism, 144...slide table, 145...table support portion, 300...control portion, G...installation surface, J1, J2, J3, 31C, 81C...rotation axis, P1, P2, P3, P5, P6...exchange position, P4...standby position, S...bed, W...work

Claims

1. An additional tool magazine device provided in a machine tool having a standard tool magazine section that stores a plurality of tools, and a tool spindle unit to which any one of the plurality of tools stored in the standard tool magazine section is attached and which processes a workpiece with the attached tool, an additional tool magazine unit that accommodates a plurality of additional tools; a tool transport device that transports any one of the plurality of additional tools accommodated in the additional tool magazine section to the standard tool magazine section, a plurality of the additional tool magazine units are provided, each of which holds the additional tool on an outer circumferential side, is supported rotatably around a rotation axis, and is arranged along the rotation axis; The tool transport device is provided for each of the plurality of additional tool magazine units. Additional tool magazine device.

2. An additional tool magazine device provided on a machine tool having a standard tool magazine section that stores a plurality of tools, and a tool spindle unit to which any of the plurality of tools stored in the standard tool magazine section is attached and which processes a workpiece with the attached tool, an additional tool magazine unit that accommodates a plurality of additional tools; a tool transport device that transports any one of the plurality of additional tools accommodated in the additional tool magazine section to the standard tool magazine section, The two additional tool magazine units are provided, each holding the additional tools on its outer periphery, supported rotatably around a rotation axis, and arranged along the rotation axis. The tool transport device is provided for each of the two additional tool magazine units. Additional tool magazine device.

3. The additional tool magazine device is configured to be retrofittable to the machine tool. The additional tool magazine device according to claim 1 or 2.

4. the tool transport device is fixed so as not to be displaced with respect to the rotation of the additional tool magazine unit; The additional tool magazine device according to any one of claims 1 to 3.

5. The additional tool magazine device according to any one of claims 1 to 4; The standard tool magazine unit; the tool spindle unit; A spindle for holding the workpiece. Machine tools.

Images