Tool holding member, tool magazine, and machine tool

Abstract

The invention provides a tool holding part, a tool magazine and a machine tool, which can reduce the damage possibility of the tool magazine. A tool holding member 35 is provided in the magazine and holds a shank supporting the tool. The base (351) is fixed to a tool magazine base of the tool magazine and has an engagement portion (354) to which the shank engages. The pair of claw members (352A, 352B) reverses around fulcrum portions (C1, C2) provided on the base (351), and grips and holds the shank in a state where the engagement portion (354) is engaged with the shank. The engagement section 354 of the base 351 has groove sections 356, 360 that extend in the left-right direction facing the pair of claw members 352A, 352B and in the direction perpendicular to the axial direction of the fulcrum sections C1, C2, and the engagement section 354 of the base 351 has groove sections 356, 360 that extend in the left-right direction facing the pair of claw members 352A, 352B and in the direction perpendicular to the axial direction of the fulcrum sections C1, C2.

Description

Technical Field

[0001] The invention relates to a tool holding component, a tool magazine and a machine tool. Background Art

[0002] The machine tool in Patent Document 1 performs a tool exchange between a tool mounted on a spindle and a next tool held by a tool holding component of a tool magazine. When exchanging tools, the machine tool moves the spindle upward. The tool holding component fixed to the tool magazine holds the tool holder mounted on the spindle. The machine tool moves the tool magazine forward to release the clamping between the tool holder held by the tool holding component and the spindle. The machine tool drives the tool magazine drive unit to rotate the tool holder of the next tool to the exchange position. The machine tool moves the tool magazine backward to clamp the tool holder of the next tool located at the exchange position with the spindle. In this state, the machine tool moves the spindle downward to remove the tool holder on which the next tool is mounted from the tool holding component.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Laid-Open No. 6-740 Summary of the invention

[0006] Problems to be solved by the invention

[0007] The tool holding member may have high strength against loads in the vertical direction. Therefore, when the spindle moving upward collides with the tool holding member at an unexpected position during tool exchange, the tool holding member may not be damaged, but a load may be applied to the tool magazine and cause damage.

[0008] The object of the present invention is to provide a tool holding component, a tool magazine, and a machine tool capable of reducing the possibility of damage to the tool magazine.

[0009] Technical means of solving problems

[0010] The tool holding component of claim 1 is arranged in the tool magazine and holds the tool handle supporting the tool, and is characterized in that it includes: a base, which is fixed to the tool magazine base of the tool magazine and has a clamping portion for the tool handle to be clamped; and a pair of claw components, which rotate around the fulcrum portion as the center, clamp and hold the tool handle when the clamping portion is engaged with the tool handle, and the clamping portion of the base has a groove portion, and the groove portion extends along the opposite direction of the pair of claw components and the direction perpendicular to the axial direction of the fulcrum portion. When the tool is replaced, the spindle may move to an unexpected position, exerting an excessive load on the tool magazine. In this case, since the groove portion is thinner than other parts of the clamping portion, the load will be concentrated on the groove portion of the tool holding component. Therefore, the tool magazine will not be damaged, but the base of the tool holding component will be damaged. Therefore, the possibility of damage to the tool magazine can be reduced.

[0011] In the tool holding component of claim 2, the groove portion may have a predetermined groove width in the opposing direction, and when viewed from one side of the axial direction, the groove portion may be arranged to overlap with the center of the engaging portion in the opposing direction. In this case, no matter where the spindle collides with the clamping arm, the load is likely to be concentrated on the groove portion of the tool holding component. Therefore, the tool magazine will not be damaged, but the base of the tool holding component will be damaged. Therefore, the possibility of damage to the tool magazine can be reduced.

[0012] In the tool holding component of claim 3, the tool holder may have a groove at a predetermined position, and the engaging portion may have an engaging portion engaged with the groove. When the spindle moves to an unexpected position, the possibility of damage to the tool holder can be suppressed by damaging the groove having the engaging portion.

[0013] In the tool holding component of claim 4, the base may be made of aluminum. Even if the tool holding component is made of aluminum, the base rather than the tool magazine may be damaged, thereby reducing the possibility of damage to the tool magazine.

[0014] In the tool holding component of claim 5, the base may be made of aluminum die-casting. Even if the tool holding component is made of aluminum die-casting, the base will be damaged instead of the tool magazine, thereby reducing the possibility of damage to the tool magazine.

[0015] In the tool holding component of claim 6, the tool holding component can be provided on a machine tool whose main axis extends horizontally. Even in a machine tool whose main axis extends horizontally, the tool holding component can reduce the possibility of damage to the tool magazine.

[0016] The tool magazine of claim 7 is characterized by comprising the tool holding component according to any one of claims 1 to 6. The possibility of the tool magazine itself being damaged can be reduced by damaging the tool holding component.

[0017] The machine tool of claim 8 is characterized by comprising the tool magazine according to claim 7. The machine tool can reduce the possibility of damage to the tool magazine due to damage to the tool holding component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] [ Figure 1 ] is a stereoscopic view of the machine tool 1.

[0019] [ Figure 2 ] is a stereoscopic view of the machine tool 1 (shutter 103: closed).

[0020] [ Figure 3 ] is a stereoscopic view of the machine tool 1 (shutter 103: open).

[0021] [ Figure 4 ] is a three-dimensional view of the machine tool 1 (the tool magazine cover 10 is omitted).

[0022] [ Figure 5 ] is a right side view of the machine tool 1 (the tool magazine cover 10 is omitted).

[0023] [ Figure 6 ] is a right side view showing a part of the periphery of the spindle head 6 in cross section.

[0024] [ Figure 7 ] is displayed from Figure 6 The figure shows a state in which the release arm 50 swings forward around the fulcrum shaft 45 from the state.

[0025] [ Figure 8 ] is a three-dimensional view of the clamping arm 35.

[0026] [ Fig. 9 ](A) is a back view of the clamping arm 35, and (B) is a view of the clamping arm 35 viewed from below.

[0027] [ Fig.10 ] is a diagram showing the state where the spindle 7 is in the machining position.

[0028] [ Fig.11 ] is displayed from Fig.10 FIG. 5 is a diagram showing a state in which the main shaft 7 moves backward from the state of .

[0029] [ Fig.12 ] is displayed from Fig.11 The diagram shows the state in which the spindle 7 rises to the Y-axis ATC origin.

[0030] [ Fig.13 ] is displayed from Fig.12 The diagram shows the state in which the spindle 7 moves backward from the Y-axis ATC origin to the ATC position. DETAILED DESCRIPTION

[0031] An embodiment of the present invention is now described. The following description will use the left and right, up and down, front and back directions indicated by the arrows in the figure. The left and right directions, up and down directions, and front and back directions of the machine tool 1 are the X-axis direction, Y-axis direction, and Z-axis direction of the machine tool 1, respectively. Figure 1 The machine tool 1 shown is a spindle 7 (see Figure 2 , Figure 6 ) is a horizontal machine tool extending in the front-to-back direction (Z-axis direction), and the column 5 described later moves in the X-axis direction and the Z-axis direction.

[0032] Reference Figure 1 to Figure 7 , the structure of the machine tool 1 is described. Figure 1 , Figure 2 As shown, the machine tool 1 includes a base 2, a column 5, a spindle head 6, and a spindle 7 (see Figure 2 , Figure 6 )、control box 8、rotating table 9、X-axis moving mechanism 11、Z-axis moving mechanism 12、Y-axis moving mechanism 13 (see Figure 6 ), ATC device 30 (see Figure 4 ), tool magazine cover 10, etc. The base 2 is an iron base that is elongated in the Z-axis direction and has a rectangular shape when viewed from a plane. The X-axis moving mechanism 11 is arranged at the rear of the upper surface of the base 2 and can support the moving body 15 movably in the X-axis direction. The Z-axis moving mechanism 12 is arranged on the upper surface of the moving body 15 and can support the column 5 movably in the Z-axis direction.

[0033] The column 5 is a column extending in the vertical direction. The column 5 has a through hole 5A (see Figure 4 The through hole 5A is in the shape of a vertically long rectangle when viewed from the front, and penetrates the front and rear surfaces of the column 5 in the front-to-back direction. The frame cover 20 is mounted on the front surface of the column 5. The frame cover 20 is a frame body in the shape of a vertically long rectangle when viewed from the front, and covers the gap between the column 5 and the spindle head 6 described later from the outside. The Y-axis moving mechanism 13 is arranged on the front surface of the column 5, and can support the spindle head 6 movably in the Y-axis direction along the front surface of the column 5 (see Figure 6 The X-axis moving mechanism 11, the Z-axis moving mechanism 12, and the Y-axis moving mechanism 13 include, for example, guide rails, ball screws, and motors, and the target components (moving body 15, column 5, spindle head 6) are moved along the guide rails by the power of the motors.

[0034] The spindle head 6 extends in the Z-axis direction. The front end side of the spindle head 6 is roughly cylindrical, and the rear end side is roughly rectangular. The machine tool 1 has a processing area and an ATC area (see Figure 5). In the Y-axis direction, the spindle head 6 can move between the processing area and the ATC area. The processing area is set in a space that is closer to the base 2 side (lower side) than the Y-axis origin. The Y-axis origin refers to the position where the mechanical coordinate of the Y-axis is 0. The ATC area is set in a space on the opposite side (upper side) of the processing area relative to the Y-axis origin. The processing area is an area for processing the workpiece fixed on the upper surface of the rotary table 9. The ATC area is an area for tool exchange through the ATC device 30. The ATC area is set on the upper side of the processing area and overlaps with the processing area in the Z-axis direction.

[0035] The spindle head 6 has an upper cover 28 and an armor cover 85. The upper cover 28 is a metal plate that is roughly rectangular in shape when viewed from the front. The lower end of the upper cover 28 is fixed to the rear end of the upper surface of the spindle head 6. The upper cover 28 extends upward from the rear end of the upper surface of the spindle head 6. The upper cover 28 moves up and down integrally with the spindle head 6, thereby always covering the area of ​​the front surface of the column 5 that is above the spindle head 6 from the front. The armor cover 85 is fixed to the rear end of the lower surface of the spindle head 6 in a hanging state. The armor cover 85 has a plurality of metal plates arranged in the up-down direction. The armor cover 85 telescopically extends and retracts in the up-down direction according to the height of the spindle head 6, thereby always covering the area of ​​the front surface of the column 5 that is below the spindle head 6 from the front.

[0036] like Figure 6 As shown, the spindle 7 is arranged at the front end side in the spindle head 6, coaxial with the spindle head 6 and extending in the Z-axis direction. The spindle head 6 rotatably supports the spindle 7. The spindle head 6 holds the spindle motor 26. The output shaft 26A of the spindle motor 26 extends forward and is coaxially connected to the rear end of the spindle 7 through the coupling 25. A release arm 50 is provided in the spindle head 6. The release arm 50 clamps and releases the tool holder 90 mounted on the spindle 7.

[0037] The spindle 7 has a tool mounting hole 40, a tool holder clamping part 41 and a pull rod 42. The tool mounting hole 40 is arranged at the front end of the spindle 7 (see Figure 1 , Figure 6 ). The tool mounting hole 40 is a tapered hole with a slightly conical shape that expands toward the front end of the spindle 7. The tool holder clamping part 41 is arranged on the inner side (rear end side) of the tool mounting hole 40. The pull rod 42 is coaxially inserted into the axial hole of the spindle 7 and is arranged to move freely in the front-to-back direction. The spindle 7 is provided with a guide hole 44 on the outer peripheral surface on the rear end side. The guide hole 44 is a long hole extending parallel to the axial direction of the spindle 7. The pull rod 42 has a pin 43 at the rear end. The pin 43 extends in a direction perpendicular to the axial direction of the pull rod 42 and protrudes to the outside of the spindle 7 through the guide hole 44 of the spindle 7. The guide hole 44 guides the pin 43 in parallel along the axial direction.

[0038] The tool holder 90 is detachably mounted in the tool mounting hole 40. The tool holder 90 holds the tool 91 at one end and has a tapered portion 92 and a traction bolt 93 at the other end. The tapered portion 92 is a slightly conical shape corresponding to the tool mounting hole 40, and gradually decreases in diameter in the direction away from the opposite side of the tool 91. The traction bolt 93 protrudes from the top of the tapered portion 92 in the direction away from the tapered portion 92. The tapered portion 92 is tightly mounted in the tool mounting hole 40 of the spindle 7. When the tapered portion 92 is mounted in the tool mounting hole 40, the tool holder clamping part 41 clamps the traction bolt 93. In this state, the tool holder clamping part 41 is pulled backward by a spring omitted in the figure, thereby locking the clamping of the traction bolt 93. When the pull rod 42 presses the tool holder clamping part 41 forward in the spindle 7, the tool holder clamping part 41 moves forward against the spring force, thereby releasing the clamping of the traction bolt 93.

[0039] like Figure 4 As shown, the base 2 has a pair of support members 17 and 18 at the rear. The support members 17 and 18 are spaced apart from each other in the left-right direction and extend upward to support the control box 8 from below. The control box 8 contains a control panel (not shown in the figure) inside. The control panel controls the operation of the machine tool 1. Figure 1 , Figure 4 , Figure 5 As shown, the base 2 is provided with a fixed table 16 on the front side of the upper surface. The rotary table 9 is rotatably supported on the fixed table 16. The rotary table 9 is located in front of the spindle head 6. The rotary table 9 fixes the workpiece (not shown) on the upper surface through a clamp (not shown), and can rotate 360° around a rotation axis parallel to the Y-axis direction.

[0040] like Figure 4 As shown, the base 2 has a pair of support columns 21 and 22 on the front side and on the left and right sides of the upper surface. The support column 21 extends upward from the right side of the upper surface of the base 2 and the upper part is bent slightly 90 degrees to the left. The support column 22 extends upward from the left side of the upper surface of the base 2 and the upper part is bent slightly 90 degrees to the right. The connecting plate 23 is rectangular in front view and is fixed between the upper parts of the support columns 21 and 22 facing each other.

[0041] The ATC device 30 is fixed to the front surface of the connecting plate 23. The ATC device 30 is supported above the spindle head 6 by the support columns 21 and 22. Figure 4 , Figure 5As shown, the ATC device 30 has a tool magazine 31, a speed reducer 32, a tool magazine motor 33, etc. The tool magazine 31 has a tool magazine base 37 and a plurality of clamping arms 35. The tool magazine base 37 is slightly disc-shaped and is rotatably supported on the front surface of the connecting plate 23 with an axis parallel to the Z-axis direction as the center. The speed reducer 32 and the tool magazine motor 33 are installed on the tool magazine 31. The output shaft (not shown) of the tool magazine motor 33 is connected to the rotating shaft (not shown) of the tool magazine base 37 through the speed reducer 32. Therefore, the power of the tool magazine motor 33 is transmitted to the rotating shaft of the tool magazine base 37 through the speed reducer 32.

[0042] like Figure 4 , Figure 5 As shown, a plurality of clamping arms 35 are arranged side by side along the outer periphery of the tool magazine base 37 and extend radially outward in a radial direction. The clamping arms 35 clamp the tool handle 90 from the left and right directions in a posture that the tool handle 90 is placed horizontally (not shown). The clamping arm 35 that exchanges tools with the spindle 7 moves to the tool exchange position of the tool magazine 31. The tool exchange position is the lowest position of the tool magazine 31. The structure of the clamping arm 35 will be described later.

[0043] like Figure 1 to Figure 3 As shown, the tool magazine cover 10 is fixed to the front surface of the upper part of each support column 21, 22. The tool magazine cover 10 is box-shaped and covers the periphery of the tool magazine 31. The tool magazine cover 10 prevents the chips and the splashes of the cutting fluid from adhering to the tool magazine 31. An opening 102 is provided on the bottom wall 101 of the tool magazine cover 10. The opening 102 is rectangular in bottom view and is located directly below the tool exchange position of the tool magazine 31. A shutter 103 is provided on the opening 102. The shutter 103 opens and closes the opening 102 according to the control of the control panel.

[0044] Reference Figure 8 , Fig. 9 The structure of the clamping arm 35 is described below. The clamping arm 35 is a left-right symmetrical structure. The clamping arm 35 has a base 351, a pair of claw parts 352A, 352B, a spring part 353, etc. The base 351 extends in the up-down direction. The upper end of the base 351 has a plurality of screw holes 363. The base 351 is fixed to the tool magazine base 37 of the tool magazine 31 by screws or the like through the plurality of screw holes 363. Fulcrum parts C1 and C2 are provided on the lower side of the base 351. The fulcrum parts C1 and C2 are arranged side by side on the left and right. The fulcrum parts C1 and C2 are cylindrical and protrude forward from the base 351. The axial direction of the fulcrum parts C1 and C2 is the front-back direction.

[0045] The lower end of the base 351 has a snap-fitting portion 354. The snap-fitting portion 354 is a portion of the base 351 that snaps into the handle 90. The snap-fitting portion 354 extends downward in a bifurcated shape. A retaining portion 359 is provided on the inner side of the bifurcated extending portion of the snap-fitting portion 354. The retaining portion 359 snaps into a groove provided on the outer peripheral surface of the handle 90 to retain the handle 90. The predetermined thickness L1 (see FIG. 1 ) of the snap-fitting portion 354 in the front-to-back direction Fig. 9 (B)) is, for example, 23 mm.

[0046] like Fig. 9 As shown in (A) and (B), the engaging portion 354 has grooves 356 and 360. The groove 356 is provided on the rear side of the engaging portion 354, and the groove 360 ​​is provided on the front side of the engaging portion 354. When viewed from the front, the grooves 356 and 360 are arranged to overlap with the center M of the base 351 in the left-right direction. More specifically, the centers of the grooves 356 and 360 in the left-right direction overlap with the center M of the base 351. The groove 356 is recessed forward from the rear surface of the engaging portion 354. The groove 360 ​​is recessed backward from the front surface of the engaging portion 354. The central portion of the groove 360 ​​in the left-right direction is further recessed backward. As a result, the thinnest portion 362 which is the thinnest in the front-back direction is formed in the central portion of the engaging portion 354 in the left-right direction.

[0047] The predetermined groove width L2 of the grooves 356 and 360 in the left-right direction and the predetermined thickness L3 of the thinnest portion 362 of the base 351 in the front-back direction are determined by the material of the base 351. The material of the base 351 is, for example, aluminum, aluminum die-casting, etc. When the material is aluminum, the groove width L2 of the groove 356 is 26 mm, and the thickness L3 of the thinnest portion 362 of the base 351 is 6 mm. When the material is aluminum die-casting, the groove width L2 of the groove 356 is 26 mm, and the thickness L3 of the thinnest portion 362 of the base 351 is 2 mm. Regardless of the material, based on the relationship between the thickness L1 of the base 351 and the thickness L3 of the thinnest portion 362, when a force of 5000 N is applied to the clamping arm 35, for example, the clamping arm 35 will be damaged with the thinnest portion 362 as the base point.

[0048] The key 357 is fixed in the groove 356. The key 357 is in a rectangular shape extending in the vertical direction. When the key 357 is fitted into the key groove of the tool handle 90, the clamp arm 35 holds the tool handle 90. Therefore, the direction of the tool handle 90 relative to the clamp arm 35 is kept constant.

[0049] A pair of claw members 352A and 352B are provided on the base 351. The pair of claw members 352A and 352B extend in the up-down direction. The pair of claw members 352A and 352B are arranged opposite to each other in the left-right direction. Holes H1 and H2 are formed in the pair of claw members 352A and 352B. The fulcrum parts C1 and C2 of the base 351 are inserted into the holes H1 and H2. In this state, the pair of claw members 352A and 352B are supported so that they can be rotated. The claw member 352A rotates around the fulcrum part C1 of the base 351. The claw member 352B rotates around the fulcrum part C2 of the base 351. The lower ends of the pair of claw members 352A and 352B respectively support the rollers 358A and 358B so that they can be rotated. The rollers 358A and 358B are disposed below the bifurcated extending portion of the engaging portion 354 of the base 351. The rollers 358A and 358B rotate around shafts 361A and 361B extending in the front-rear direction.

[0050] The spring member 353 is fixed between the upper ends of the pair of claw members 352A and 352B. The spring member 353 always applies pressure in the direction of moving the upper ends of the pair of claw members 352A and 352B away from each other. As a result, the lower ends of the pair of claw members 352A and 352B move back and forth in the direction of approaching each other with the fulcrums C1 and C2 as the center. When the holding portion 359 of the engaging portion 354 holds the knife handle 90 and the key 357 is engaged in the keyway of the knife handle 90, the pair of claw members 352A and 352B clamp and hold the knife handle 90.

[0051] The ATC operation of the machine tool 1 will now be described. Figure 10 to Figure 13 The tool holder 90 is omitted in the figure. In order to explain the position of the spindle 7 during the ATC operation, the movement of the spindle head 6 is described as the movement of the spindle 7. Fig.10 As shown, during workpiece processing, the spindle 7 is located in the processing area. The shutter 103 of the tool magazine cover 10 is in a closed state (see Figure 2 The tool mounting hole 40 of the spindle 7 is provided with a tapered portion 92 of the tool handle 90. The tool handle clamping member 41 holds the traction bolt 93 of the tool handle 90 and locks it by spring force (see Figure 6 ).

[0052] The CPU of the control panel reads the tool change instructions of the NC program. Fig.11 As shown, the spindle 7 retreats in the Z-axis direction to a position where the tool 91 does not contact the workpiece and fixture (not shown) on the rotary table 9. The shutter 103 of the tool magazine cover 10 is opened (see Figure 3 The clamp arm 35 located at the tool exchange position is exposed from below through the opening 102. The clamp arm 35 located at the tool exchange position is in an empty state without clamping the tool holder 90.

[0053] The spindle 7 starts to rise and moves toward the Y-axis ATC origin. The Y-axis ATC origin is a position with the same coordinates as the ATC origin in the Y-axis direction and is located in front of the ATC origin. The ATC origin is a reference point for tool exchange set in the ATC area and is a position where the tool magazine 31 can rotate.

[0054] like Fig.12 As shown, when the spindle 7 reaches the Y-axis ATC origin, the tool holder 90 mounted on the spindle 7 is pressed into the clamping arm 35 located at the tool exchange position from below through the opening 102 of the tool magazine cover 10. When the tool holder 90 contacts and rises from below to the rollers 358A and 358B of a pair of claw parts 352A and 352B, the rollers 358A and 358B move back in the direction away from each other by resisting the biasing force of the spring part 353 on the tool holder 90. When the tool holder 90 is pressed into the depth of the clamping part 354, the retaining part 359 of the clamping part 354 retains the groove of the tool holder 90, and the key 357 of the clamping part 354 is embedded in the keyway of the tool holder 90. In this case, the rollers 358A and 358B of the pair of claw parts 352A and 352B move in the direction of approaching each other by the biasing force of the spring part 353. Thus, the clamping arm 35 clamps the tool holder 90.

[0055] On the other hand, as the main shaft 7 rises, the cam follower 54 contacts the lower part of the cam surface 801 of the cam member 80 and slides upward (see Figure 7 ). The tension spring always applies a biasing force in the clockwise direction as viewed from the right side to the release arm 50 with the fulcrum shaft 45 as the center. Therefore, the cam follower 54 is in close contact with the cam surface 801. The cam follower 54 moves forward as it slides upward along the cam surface 801. Therefore, the release arm 50 swings in the counterclockwise direction as viewed from the right side with the fulcrum shaft 45 as the center, resisting the elastic force of the tension spring. The clamping parts 57 and 58 contact the two ends of the pin 43 of the pull rod 42 from the rear, pressing the pull rod 42 forward. The pull rod 42 biases the tool holder clamping component 41 forward. The tool holder clamping component 41 releases the lock of the traction bolt 93. The tool holder 90 becomes removable from the tool mounting hole 40 of the spindle 7.

[0056] In the state where the clamp arm 35 clamps the tool holder 90 mounted on the spindle 7, the spindle 7 retreats from the Y-axis ATC origin to the ATC position (see Fig.13 ). Since the locking of the pulling bolt 93 has been released, the tapered portion 92 of the tool holder 90 is disengaged from the tool mounting hole 40 of the spindle 7. The tool magazine 31 rotates, and the clamping arm 35 holding the tool holder 90 of the next tool is indexed and positioned to the tool exchange position. The so-called next tool refers to the next tool to be mounted on the spindle 7 specified by the tool exchange instruction. The tapered portion 92 of the tool holder 90 of the next tool is located in front of the tool mounting hole 40 of the spindle 7.

[0057] Spindle 7 moves from the ATC position to the Y-axis ATC origin (see Fig.12 ). The tapered portion 92 of the tool holder 90 is inserted into the tool mounting hole 40, and the tool holder clamping component 41 clamps the traction bolt 93. The cam follower 54 slides the cam surface 801 from top to bottom. As the cam follower 54 moves backward, the release arm 50 swings clockwise around the fulcrum shaft 45 as viewed from the right side. The clamping portions 57 and 58 move backward from both ends of the pin 43, releasing the forward pressure on the pull rod 42. The pull rod 42 releases the forward bias on the tool holder clamping component 41, so that the tool holder clamping component 41 locks the clamping of the traction bolt 93. As the ATC action is completed, the spindle 7 descends to the processing area and enters the next workpiece processing.

[0058] During the above-mentioned ATC action, the spindle 7 may move to an unexpected position. For example, when there is an error in the mechanical parameter setting, the spindle 7 rises to a position that deviates from the Y-axis ATC origin. In this case, the tool holder 90 mounted on the spindle 7 cannot be correctly installed on the engaging portion 354 of the clamping arm 35. At this time, the tool 91, the tool holder 90 or the spindle 7 that rises for tool exchange will collide with the clamping arm 35 from below. The clamping arm 35 will generate an excessive load. The collision load is concentrated on the thinnest portion 362 of the clamping arm 35. Therefore, the clamping arm 35 will be damaged with the thinnest portion 362 as the base point. The so-called damage to the clamping arm 35 refers to the deformation of the overall shape, such as breakage or crushing. Due to the damage to the clamping arm 35, the tool magazine base 37, the reducer 32, etc. of the tool magazine 31 will not be subjected to the load. Therefore, the clamping arm 35 can suppress the damage to the tool magazine base 37, the reducer 32, etc. of the tool magazine 31. In this case, the user only needs to replace the clamping arm 35 with a new one to restore the function of the machine tool 1 .

[0059] As described above, the engagement portion 354 of the base 351 has the grooves 356 and 360 extending in the left-right direction opposing the pair of claw members 352A and 352B and in the up-down direction perpendicular to the axial direction of the fulcrums C1 and C2.

[0060] When the tool is replaced, the spindle 7 may move to an unexpected position, causing an excessive load on the tool magazine 31. In this case, since the grooves 356 and 360 are thinner than other parts of the engaging portion 354, the load will be concentrated on the grooves 356 and 360 of the clamping arm 35. Therefore, it is not the tool magazine 31 that is damaged, but the base 351 of the clamping arm 35 that is damaged. Therefore, the possibility of damage to the tool magazine 31 can be reduced. In this case, the user only needs to replace the clamping arm 35. Therefore, compared with the case where the tool magazine 31 is damaged, the clamping arm 35 can suppress the occurrence of opportunity loss for the user.

[0061] The grooves 356 and 360 have a predetermined groove width L2 in the left-right direction. When viewed from the front, the grooves 356 and 360 are arranged to overlap with the center M of the engaging portion 354 in the left-right direction. In this case, no matter where the spindle 7 collides with the clamping arm 35, the load is likely to be concentrated on the grooves 356 and 360 of the clamping arm 35. Therefore, the tool magazine 31 is not damaged, but the base 351 of the clamping arm 35 is damaged. Therefore, the possibility of damage to the tool magazine 31 can be reduced.

[0062] The tool holder 90 is provided with a key groove at a predetermined position. The engaging portion 354 has a key 357 that fits into the key groove. When the spindle 7 moves to an unexpected position, the groove portion 356 having the key 357 is damaged, thereby suppressing the possibility of damage to the tool holder 90.

[0063] The material of the base 351 is aluminum. Even if the material of the clamp arm 35 is aluminum, it is not the tool magazine 31 that is damaged but the base 351. Therefore, the possibility of damage to the tool magazine 31 can be reduced.

[0064] The material of the base 351 is aluminum die casting. Even if the material of the clamp arm 35 is aluminum die casting, it is not the tool magazine 31 but the base 351 that is damaged. Therefore, the possibility of damage to the tool magazine 31 can be reduced.

[0065] The clamp arm 35 is provided in the machine tool 1 in which the axial direction of the main spindle 7 extends in the front-rear direction. Even in the machine tool 1 in which the axial direction of the main spindle 7 extends in the front-rear direction, the clamp arm 35 can reduce the possibility of damage to the tool magazine 31.

[0066] The tool magazine 31 includes a clamping arm 35. By preventing the clamping arm 35 from being damaged, the tool magazine 31 can reduce the possibility of damage to itself.

[0067] The machine tool 1 includes a tool magazine 31. The machine tool 1 can reduce the possibility of damage to the tool magazine 31 due to damage to the gripper arm 35.

[0068] The present invention is not limited to the above-mentioned embodiment, and various modifications are possible. The machine tool 1 of the above-mentioned embodiment is horizontal, but it can also be vertical in which the axis direction of the spindle 7 is in the up-down direction. The machine tool 1 has a Z-axis moving mechanism 12 on the X-axis moving mechanism 11, but the up-down positions of the X-axis moving mechanism 11 and the Z-axis moving mechanism 12 can also be reversed. The column 5 of the machine tool 1 moves along the X-axis direction and the Z-axis direction, but the position of the column 5 relative to the base 2 can also be fixed, and the worktable supporting the workpiece can be moved along the X-axis direction and the Z-axis direction.

[0069] In the above embodiment, the shape of the clamping arm 35 is as follows: Figure 8 , Fig. 9As shown, but not limited to this. The shapes of the base 351 and the pair of claw parts 352A, 352B can be appropriately changed. The pair of claw parts 352A, 352B rotate around the two fulcrum parts C1, C2 respectively, but a structure that revolves around one fulcrum can also be adopted. The fulcrum parts C1, C2 are set on the base 351, but not limited to this. The fulcrum parts C1, C2 can also be set on the pair of claw parts 352A, 352B. In this case, it is best to set holes H1, H2 in the base 351 for the fulcrum parts C1, C2 to be inserted. Even in this case, the pair of claw parts 352A, 352B can revolve around the fulcrum parts C1, C2.

[0070] In the above embodiment, the material of the base 351 is aluminum or aluminum die-casting, but it is not limited thereto. For example, the base 351 may also be made of other materials such as iron and copper. In this case, the thickness L1 of the base 351 and the thickness L3 of the thinnest portion 362 of the base 351 may be set according to the material thereof. In this case, it is preferable to set the thickness L1 and the thickness L3 so that the base 351 is damaged when a force of 5000N is applied.

[0071] In the above embodiment, the thickness L1 of the base 351 and the thickness L3 of the thinnest portion 362 are set so that the clamping arm 35 is damaged when a force of 5000N is applied, but the present invention is not limited thereto. For example, the thickness L1 and the thickness L3 may be set so that the clamping arm 35 is damaged when a force other than 5000N is applied. In this case, the groove width L2 of the grooves 356 and 360 should also be appropriately set. It may also be set so that damage occurs under a force less than 5000N. In this case, the groove width L2 of the grooves 356 and 360 should also be appropriately set.

[0072] In the above-mentioned embodiment, the left-right center of the grooves 356 and 360 overlaps with the left-right center M of the engaging portion 354, but the present invention is not limited thereto. For example, it is sufficient that a portion of the grooves 356 and 360 overlaps with the center M. In addition, the grooves 356 and 360 may not overlap with the left-right center M of the engaging portion 354. For example, the grooves 356 and 360 may be arranged on the left side of the center M of the engaging portion 354, or on the right side. The shape of the grooves 356 and 360 may be appropriately changed. For example, the shape of the grooves 356 and 360 may be an elongated straight line, or a circle or an ellipse.

[0073] In the above embodiment, the thickness L3 of the thinnest portion 362 is defined by the grooves 356 and 360, but the present invention is not limited thereto. For example, the thinnest portion 362 of the groove 360 ​​may not exist. In this case, the thickness L3 associated with the grooves 356 and 360 may be defined without the thinnest portion 362. Either of the grooves 356 and 360 may not exist. In this case, the thickness L3 of the base 351 may be defined by either the groove 356 or the groove 360.

[0074] In the above description, the clamp arm 35 is an example of a “tool gripping member.” The key 357 is an example of a “fitting portion.” Figure 8 , Fig. 9 The left and right direction is an example of "opposite direction". The front and rear direction is an example of "axial direction". The front or rear is an example of "one side". The front and rear direction is an example of "horizontal direction".

[0075] Explanation of symbols

[0076] 1: Machine tools

[0077] 31: Tool magazine

[0078] 35: Clamping arm

[0079] 37: Tool magazine base

[0080] 90: Handle

[0081] 91: Knife

[0082] 351: Base

[0083] 354: snap-fit ​​part

[0084] 352A, 352B: A pair of claw parts

[0085] 356, 360: Groove

[0086] 357: Key

[0087] C1, C2: Fulcrum

[0088] L2: Groove width

[0089] M: Center

Claims

1. A tool holding component, which is arranged in a tool magazine and holds a tool handle supporting a tool, wherein the tool holding component is characterized in that it comprises: A base, fixed to the tool magazine base of the tool magazine, and having a clamping portion for the tool handle to be clamped; as well as A pair of claw parts rotate around the fulcrum part, and clamp and hold the knife handle when the engaging part is engaged with the knife handle. The engaging portion of the base has a groove portion extending in a direction facing the pair of claw members and in a direction perpendicular to the axial direction of the fulcrum portion.

2. The tool holding component according to claim 1, characterized in that: The groove portion has a predetermined groove width in the opposite direction, The groove portion is arranged to overlap with the center of the engagement portion in the facing direction when viewed from one side in the axial direction.

3. The tool holding component according to claim 1, characterized in that: The handle has a groove at a predetermined position. The engaging portion includes a fitting portion that fits into the groove portion.

4. The tool holding component according to claim 1, characterized in that: The base is made of aluminum.

5. The tool holding component according to claim 1, characterized in that: The base is made of aluminum die-casting.

6. The tool holding component according to claim 1, characterized in that: The tool holding component is arranged on a machine tool whose main shaft axis direction extends in a horizontal direction.

7. A tool magazine, characterized in that: The utility model comprises the tool holding component according to any one of claims 1 to 6.

8. A machine tool, characterized in that: Comprising the tool magazine as claimed in claim 7.

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