JPH0976120A - Tapping device of turret punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform tapping work with a wide range of size to the wide range of plate thickness by providing a tool holder to be normally and reversely rotated by the operation of a worm gear provided on a mounting hole of an upper turret and a worm wheel to be meshed with the worm gear so that it may be freely raised and lowered. SOLUTION: When a worm gear 171 is rotated in the suitable direction at suitable speed, a worm wheel 169 to be engaged with the worm gear 171 is decelerated and rotated with large torque. The rotation of the worm wheel 169 is transmitted to a lower holder 205 through a rotation transmitting key 239. Since the lower holder 205 and a tool holder 203 are engaged with each other by the key 207, they are integrally rotated together. When the worm wheel 169 is rotated, the tool holder 203 is lowered while being rotated with a lead of the reed screw 221, and a thread hole is machined on a plate material W by a tap T.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tapping device for a turret punch press.

[0002]

2. Description of the Related Art For example, Japanese Patent Laid-Open No. 4-115816 discloses a tapping device for a turret punch press. This tapping device is a mechanism that converts the linear motion of the striker, which is the pressing means of the turret punch press, into a rotary motion, and the speed difference that absorbs the speed difference between the high speed linear motion of the striker and the feed speed during tapping. It is composed of an absorption mechanism, a feed mechanism that imparts rotation to the tap, and a gas spring that imparts high-speed reverse rotation to the tap after the tapping process is completed.

In Japanese Utility Model Publication No. 3-18013, tapping, drilling, etc. are performed outside the working range of a press ram (corresponding to the above-mentioned striker) in a press device for performing punching, blanking, burring and other press workings. A device is provided.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the tapping device for a press disclosed in Japanese Patent No. 816, since a striker, which is a pressing means of a turret punch press, is used as a driving source for tapping, there is an advantage that tapping can be performed at an extremely high speed. However, since the tap is rotated at a very high speed, the driving force for rotating the tap cannot be increased so much. In addition, performing tapping at a very high speed also means that tapping is completed in a very short time, which limits the plate thickness at which tapping can be performed, and it is possible to use it. There is a problem that the size of such a tap is limited to about M3 to M5.

Further, in the tapping device for a press disclosed in Japanese Utility Model Publication No. 3-18013, since the working position of the press and the working position of the tapping device are not at the same position, the moving area of the material positioning device in the press is not. Therefore, there is a problem that the processing range of tapping processing is limited. In addition, the entire machine must be stopped when the tapping device is maintained and managed.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a tapping device for a turret punch press capable of tapping a wide range of plate thicknesses and a wide range of sizes. Is.

[0007]

A tapping device for a turret punch press according to claim 1, wherein a worm gear is provided in mounting holes of upper and lower turrets for mounting a punch holder and a die holder, and an annular worm wheel engaged with the worm gear. A tapping device of a turret punch press equipped with an index mechanism capable of rotationally driving the punch holder and the die holder, and the upper holder is mounted in the mounting hole of the upper turret with its rotation restricted, A lower holder rotatably supported on the lower holder, and a tool holder is provided in the lower holder so as to be slidable in the axial direction relative to the lower holder and restricting relative rotation, and a nut portion of the tool holder; The driver guide provided on the upper holder is screwed onto the lead screw part of the driver that is non-rotatable and slidable in the axial direction. A lifter spring is mounted between the punch head provided on the upper end of the driver and the driver guide, and the rotation transmission key provided on the lower holder and the key groove provided on the worm wheel are provided so as to be engaged with each other. It is what

Therefore, by driving the worm gear provided in the mounting hole of the upper turret and the worm wheel meshing with the worm gear, it is possible to rotate the tool holder holding the tap T forward and backward with a large rotational force. .

A tapping device for a turret punch press according to a second aspect is the tapping device for a turret punch press according to the first aspect, wherein the tool holder is provided with a plate holder for pressing the plate material, and the plate holder is the plate material. The gist is that a brush made of a material having a hardness smaller than that of the plate material is provided on the opposite end surfaces. Therefore, it is possible to prevent the scratches generated on the surface of the plate material when the plate retainer presses the plate material.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a tapping device for a turret punch press according to the present invention will be described below with reference to the drawings.

Referring to FIGS. 1, 2 and 3, the turret punch press 1 is provided with a common base 3, and a gate-shaped main body frame 5 is erected on the common base 3. The body frame 5 is composed of an upper frame 5U having an opening 7 and a lower frame 5L. A disk support 9 that receives the force of the press is provided at the processing position on the lower frame 5L.

The upper frame 5U of the main body frame 5 is provided with a hydraulic cylinder for moving the ram 11 up and down, or a drive device 13 including crank drive or servo drive. A striker 15 is provided below the ram 11. Further, the ram 11 is guided by a ram guide member 17 attached to the upper frame 5U, and is slidably slid in the Z-axis direction (vertical direction in FIGS. 1 and 2).

With the above structure, when the driving device 13 is driven, the ram 11 is guided by the ram guide member 17 and Z
Since it moves in the axial direction, the striker 15 is moved up and down.

A plurality of brackets 19 are attached to the lower frame 5L of the main body frame 5 extending in the Z-axis direction at appropriate intervals in the Y-axis direction (horizontal direction in FIGS. 2 and 3). A support frame 21 is provided on the plurality of brackets 19. A work table 25 is attached to each of the support frames 21 via a plurality of balls 23.
The side table 25S is provided so as to be movable in the Y-axis direction. The work table 25 has side tables 25S on both sides of a fixed center table 25C.

On the left side of the work table 25 in FIG. 3, a carriage base 29 of the plate material movement positioning device 27 is provided. This carriage base 2
9 supports a rotatable ball screw 31 extending in the X-axis direction (the left-right direction in FIG. 1 and the up-down direction in FIG. 3). The ball screw 31 is provided with a carriage 33 that is movable in the X-axis direction via a nut member. Moreover, the carriage 33 is provided with a plurality of work clamps 35 for clamping the plate material W.

An X-axis motor 37 is provided below the carriage base 29 as shown in FIG. 3, and a drive pulley 39 is attached to the output shaft of the X-axis motor 37. On the other hand, a driven pulley 41 is attached to one end of the ball screw 31, and a timing belt 43 is wound around the driven pulley 41 and the drive pulley 39.

With the above structure, when the Y-axis drive motor (not shown) is driven, the side table 25S is moved in the Y-axis direction via the carriage base 29 and the balls 23 supported by the support frame 21. become.
Further, when the X-axis drive motor 37 is driven, the carriage 33 is moved in the X-axis direction. Therefore, the plate material W clamped by the work clamp 35 is X,
The plate W is moved in the Y-axis direction, and the desired position of the plate W is positioned at the processing position below the striker 15.

A sub-frame 45 adjacent to the body frame 5 is erected on the common base 3. The sub frame 45 is an upper frame 45U and a lower frame 45.
It has a C-shaped structure made of L. An upper turret 49 having a rectangular parallelepiped shape, for example, is rotatable below the upper frame 45U via an upper rotation shaft 47U, and an upper turret 49 is rotatable above the lower frame 45L via a lower rotation shaft 47L. The lower turrets 51 each having a rectangular shape are supported.

Punch holders PH with punches P mounted on both sides of the upper turret 49 are removably mounted in the punch holder mounting holes, and on both sides of the lower turret 51 at positions corresponding to the punches P. A die holder DH on which the die D is mounted is detachably attached to the die holder mounting hole. Moreover, the upper and lower frames 45U, 4
The inside of 5L is on both left and right sides in FIG. 2, that is, FIG.
As shown in FIG. 5, there are provided, for example, fluid cylinders 53U, 53L; 55U; 55L as rotation driving means for rotating the upper and lower rotary shafts 47U, 47L,
Piston rods 57U, 57L mounted on the fluid cylinders 53U, 53L; 55U, 55L; 59U, 59
Racks 61U and 61L; 63U and 63L are integrally provided at the tip of L. This rack 61U, 61L;
63U and 63L include the upper and lower rotary shafts 47U and 4
The pinions 65 and 67 fitted to 7L are meshed.

With the above structure, the fluid cylinders 53U, 5
3L; 55U, 55L are actuated, the piston rods 57U, 57L; 59U, 59L are moved in the left-right direction in FIG. 4, so racks 61U, 61L; 63
The upper and lower rotary shafts 47U and 47L are synchronously rotated in the same direction via the U and 63L and the pinions 65 and 67, respectively. Therefore, the structure is simple, and the upper and lower turrets 49, 51 can be rotated at high speed and can be manufactured at low cost. Incidentally, as the rotation driving means,
The upper and lower rotary shafts 47U, 47L may be rotated by a drive motor, a worm gear, and a worm wheel.

A side portion of the lower turret 51 is provided with a semi-arcuate auxiliary table 71 having a supporting member 69 such as a brush for supporting the plate material W, as shown in FIG. Therefore, the downward forming process can be performed, and the scratches generated on the plate material W when the lower turret 51 is rotated can be reduced.

With the above structure, the upper and lower rotary shafts 47
By rotating U and 47L, the upper and lower turrets 49 and 51 are indexed, and the selected punch P and die D are positioned at the processing position. Then, as the striker 15 moves up and down, the punch P and the die D cooperate with each other to punch the plate W at a desired position.

As described above, the punching process is performed by the operation of the vertically movable ram 11, and the heat generated by the operation at this time extends from the upper frame 5U portion to the upper frame 45U portion of the sub-frame 45. Is released without conducting heat. That is, the upper and lower turrets 4
9, 51 are upper and lower frames 4 of the sub-frame 45
Since it is supported by 5U and 45L, the thermal displacement generated in the upper and lower turrets 49 and 51 is
It can be maintained only by the heat of rotation of the ram 11 and is not affected by a large heat such as misalignment caused by the heat generated by the ram 11.

A punch holder magazine 73, which is adjacent to the upper side of the sub-frame 45 and the left side of the lower frames 45U and 45L (in FIG. 1), supports the punch P to be attached to and detached from the upper turret 49. A die holder magazine 75 supporting a die D to be attached / detached and exchanged is provided on the lower turret 51. Upper turret 4
As shown in FIG. 1, the punch attaching / detaching / changing position PT 9 is located below the punch holder magazine 73, and the die attaching / detaching / changing position DT of the lower turret 51 is also shown in FIG. , The die holder magazine 7
The upper and lower die exchanging devices 77U and 77L are arranged above and below the die exchanging device 5 in the vertical direction of the punch and die exchanging positions PT and DT.

The punch holder magazine and the die holder magazines 73 and 75 are arranged so as to face each other in the vertical direction, and as shown in FIG. 3, endless chain members 79 and 81 are provided with drive sprockets 83 and 75, respectively.
It is wound around a driven sprocket 85. The drive sprockets 83 include drive motors 87, 8 such as servo motors.
9 are linked and linked. A punch holder and a die holder P face the chain members 79 and 81, respectively.
A plurality of clamp claws 91 and 93 for clamping H and DH are attached endlessly.

Chuck pawls 95, 97 for clamping the punch holder and die holders PH, DH are provided below the upper and lower mold exchanging devices 77U, 77L. In addition, the upper and lower frames 45 of the sub-frame 45
The upper and lower mold exchanging devices 77U and 77L are moved up and down by drive motors 99 and 101 for changers such as servomotors attached to U and 45L.

With the above construction, the upper and lower die exchanging devices are operated at the punch and die attaching / detaching exchanging positions PT and DT while the plate material W is being punched by the cooperation of the punch P and the die D at the processing position. 77U, 77L drive motor 9
9 and 101 to move up and down to move the upper and lower turrets 49,
Punch holder and die holder P mounted on 51
H and DH are taken out by the chuck claws 95 and 97 and mounted on the punch holder magazine and the die holder magazines 73 and 75. Next, the punch holders and the die holders PH and DH are chucked by the clamp claws 91 and 93 of the punch holder magazine and the die holder magazines 73 and 75.
It is taken out by 7 and attached to the upper and lower turrets 49 and 51. By performing this series of operations, the punch and die attachment / detachment exchange positions PT and DT and the punch holder and die holder magazines 73 and 75 are linearly moved in the vertical direction of the upper and lower mold exchanging devices 77U and 77L. On the move,
Since the punch holder and the die holders PH and DH can be directly exchanged, the setup time and the exchange time can be shortened as compared with the conventional case. Therefore, it is possible to handle high-mix low-volume production and flexible automation, and it is possible to perform unmanned operation.

At the exchange positions of the punch holder magazine and the die holder magazines 73 and 75, as shown in FIGS. 2 and 3, a conventional mold exchanging device 103 having two known arms and a tooling are used. The tower 105 is arranged. This mold exchanging device 103 has two arms 1
Clamp claw 109 is attached to the tip of 07, 90, 1
Since it can be rotated by 80 degrees, and the structure is already known, detailed description thereof will be omitted. The tooling tower 105 also has a clamp claw 1 on the outer periphery of the cylindrical member 111.
Punch holders and die holders PH and DH are clamped by the clamp claws 113.
The cylindrical member 111 is rotatable and vertically movable. That is, the cylindrical member 111 is the fluid cylinder 1.
15 is moved up and down by the operation of 15, and the servo motor 117
Drive pulley 119 and timing belt 12
1, It is adapted to be rotated via a driven pulley 123. Therefore, between the punch holder magazine and die holder magazines 73 and 75 and the tooling tower 105, the punch holder and die holder P are connected by the mold exchanging device 103.
The exchange of H and DH is performed.

The specific construction of the upper die exchanging device 77U in the die exchanging device 77 has been described, but the lower die exchanging device 77L has almost the same constitution, and the movement is only up and down. Is omitted.

FIG. 6 shows the structure of an automatic index for rotating the punch holder PH which can support the punch P on the upper turret 49 of the rectangular parallelepiped shape. In FIG. 6, a bearing 125 is attached to a part of the upper frame 5U of the main body frame 5, and a drive shaft 127 is rotatably supported by the bearing 125. A drive motor 131 such as a servo motor is attached to one end of the drive shaft 127 via a reduction mechanism 129. On the other hand, the drive shaft 12
A plurality of drive pulleys 133 are rotatably supported at the other end of 7.

A bearing 135 is attached to the right side of FIG. 6 which is a part of the upper frame 5U.
A connecting shaft 137 is rotatably supported on the shaft 5. At one end of the connecting shaft 137, the clutch member 13 is pressed by the key K.
9 is fixed. A fixing claw 141 is provided at the tip of the clutch member 139. On the other hand, the connecting shaft 137
A plurality of driven pulleys 143 are rotatably supported at the other end of the. Each driven pulley 143 and the drive pulley 13
A timing belt 145 is wound around the belt 3. An idler pulley 147 for adjusting tension is abutted on the timing belt 145, and the idler pulley 147 is attached to the upper frame 5U.

Upper frame 5 to which the bearing 135 is attached
An air cylinder 149 is attached to the left side of U.
Piston rod 1 mounted on this air cylinder 149
A moving member 153 is provided at the tip of 51, and the moving member 153 is engaged with the clutch member 139. Detection switches SW1 and SW2 are provided in the moving area of the moving member 153.

Upper frame 5 to which the bearing 135 is attached
On the right side of U, an air cylinder 155 for positioning is attached. A shot pin 159 is provided at the tip of a piston rod 157 attached to the air cylinder 155. Detection switches SW3 and SW4 are provided in the moving region of the portion of the piston rod 157 which projects rearward.

A positioning block 163 having a shot pin hole 161 with which the shot pin 159 is engaged is attached to a side end surface of the upper turret 49.

The clutch member 1 of the upper turret 49
At the position facing 39, the cylindrical clutch member 16
5 is provided, and a worm gear rotation shaft 167 is rotatably supported on the shaft center of the clutched member 165. A worm gear 171 that meshes with an annular worm wheel 169 fitted to the punch holder PH is attached to the other end of the worm gear rotation shaft 167. The pin 175 is fitted into the groove formed in the clutched member 165 by the urging force of the spring 173.

When the punch holder PH supporting the punch P is rotated by the above-described structure, first, the air cylinder 155 is operated to raise the piston rod 157 in FIG. To the position indicated by the solid line and is engaged with the shot pin hole 161. This engagement state can be confirmed by the detection switch SW4, and the disengagement state can be confirmed by the detection switch SW3.

The shot pin 159 is the shot pin hole 1
When engaged with 61, the air cylinder 149 is then actuated to raise the piston rod 151 in FIG. 6, and the clutch member 139 rises through the moving member 153 and engages with the clutched member 165. At the same time, the fixing claw 141 resists the biasing force of the spring 173, and
The clutch member 139 is fixed to the clutched member 165 by pressing 5 to fit in the groove of the clutched member 165, and the connecting shaft 137 and the worm gear rotating shaft 167 are connected. The clutch member 139 and the clutched member 16
The engagement state with 5 is confirmed by the detection switch SW1, and the disengagement state is confirmed by the detection switch SW2.

Next, when the drive motor 131 is driven, the drive shaft 127 is rotated via the speed reducer 129.
The rotation of the drive shaft 127 causes the connection shaft 137 to rotate via the drive pulley 133, the timing belt 145, and the driven pulley 143, so that the worm gear rotation shaft 167 rotates in the same direction. When the worm gear rotation shaft 167 is rotated, the worm gear 171 and the worm wheel 16 are rotated.
The punch holder PH is rotated via 9.
When the punch holder PH is not rotated, the drive motor 131 is stopped. Further, the clutch member 139 may be disengaged from the clutched member 165 and the shot pin 159 may be disengaged from the shot pin hole 161. The die holder D mounted on the lower turret 51
Since the structure for rotating H is almost the same as the structure described above, the description is omitted.

FIG. 7 is a sectional view taken along line VII-VII of FIG. 6, showing a state in which the tapping device 200 of the turret punch press according to the present invention is mounted on the upper turret 49.

The tapping device 200 shown in FIG.
Shows an example in which a tap T is attached as a tool. In addition to the tap T, a tool such as a reamer or a drill can be used for the tapping device 200.

In the tapping device 200, the tool holder 203 having a known tool holding mechanism 201 such as a collet chuck for holding the tap T is provided with the lower holder 20.
The lower holder 20 is slidably engaged with the lower holder 20 in the vertical axis direction and is rotated integrally with the lower holder 203.
The key 207 provided on the lower end of the tool 5 and the key groove 209 provided on the tool holder 203 are engaged with each other.

The lower part of the lower holder 205 is a bush 211L of the punch holder mounting hole of the upper turret 49.
It is rotatably fitted in. Also, this lower holder 205
A bearing mounting portion formed to have a smaller diameter than the fitting portion is provided in the upper portion of the above, and a plurality of bearings 213 are fixedly mounted to this bearing mounting portion by snap rings SR or the like.

The outer ring side of the bearing 213 is fixed to the inner diameter portion of the upper holder 215 by a snap ring SR. Further, the body of the upper holder 215 is fitted in the bush 211U of the punch holder mounting hole, and the locking hole of the flange 217 provided on the upper end of the body of the upper holder 215 has the engaging hole of the upper turret 49. It engages with a locking pin 219 provided on the bush 211U of the punch holder mounting hole so as to be retractable. A groove is formed on the outer periphery of the collar portion 217 so as to be caught by the clamp claw 91 of the punch holder magazine 73 and the chuck claw 95 of the upper die exchanging device 77U.

The collar portion 217 of the upper holder 215 has:
A driver guide 225 for guiding the driver 223 is fixed by bolts. A lead screw 221 that is screwed into the nut of the tool holder 203 is provided below the driver 223, and the punch head 2 that is hit by the striker 15 of the turret punch press is provided at the upper end portion.
27 are provided. When the tap T is mounted as a tool, the pitch of the tap matches the lead of the lead screw 221.

A lifter spring 229 for biasing the tool holder 203 upward is mounted between the punch head 227 and the driver guide 225. A key groove 231 is provided in the driver 223 in the axial direction, and a key 235 provided in the driver guide 225 is engaged with the key groove 231. The driver guide 225 and the upper holder 215 may be integrally manufactured.

The annular worm wheel 169 of the upper turret 49 is provided with a key groove 237, and the lower holder 205 is provided with a rotation transmission key 239 which engages with the key groove 237. Also, the bush 2
The 11U is also provided with a key groove 241 that engages with the rotation transmission key 239.

On the lower surface of the tool holder 203, a plate holder 245 is loosely fitted on a shoulder screw 243 embedded in the tool holder 203, and a spring 247 is mounted between the plate holder 245 and the tool holder 203. is there. Further, a brush 246 made of a material having a hardness lower than that of the plate material is planted on the end surface of the plate holder 245 facing the plate material W to prevent scratches on the surface of the plate material when the plate holder 245 presses the plate material W. it can.

A description will be given of the case where the tapping processing is carried out in the tapping device having the above construction. As described above, when the worm gear 171 is rotated at an appropriate speed in an appropriate direction, the worm wheel 169 engaged with the worm gear 171 is decelerated and rotated with a large rotational force. The rotation of the worm wheel 169 is transmitted to the lower holder 205 via the rotation transmission key 239. Further, since the lower holder 205 and the tool holder 203 are engaged with each other by the key 207, they are integrally rotated.

The nut portion of the tool holder 203 is screwed into the lead screw 221 of the driver 223. The lead screw 221 is screwed into the driver guide 225.
The rotation of the worm wheel 169 is restricted by the key 235 provided on the upper surface of the tool holder 2 and the locking pin 219 that is provided on the bush 211U so that the tool holder 2 can rotate.
03 descends or rises while rotating in accordance with the lead of the lead screw 221. That is, the tap T held by the tool holding mechanism 201 is lowered or raised while rotating according to the lead of the lead screw 221.

On the other hand, the stroke position of the striker 15 can be arbitrarily controlled as described above, and by pressing the punch head 227 with the striker 15, the driver 223 is lowered to an arbitrary position. Can be made. That is, the tip of the tap T can be lowered to a position where it comes into contact with the prepared hole of the plate material W, and the lowering can be stopped at that position.

Now, the case of tapping will be described more specifically. First, the die D having a hole larger than the diameter of the tap is attached to the die holder DH. next,
The plate material W with the prepared tapping hole 249 is positioned by the plate material movement positioning device 27 at the processing position below the striker 15.

Next, the ram 11 is driven, and the punch head 227 is pushed down by the striker 15 to a position where the tip of the tap T comes into contact with the prepared hole of the plate material W and stopped. At this time, the plate retainer 245 first presses and contacts the plate material W via the spring 247. In addition, this spring 247
The pressing force of is set to such a degree that the plate material W is lightly pressed.

In this state, the worm gear 171 is rotationally driven so that the worm wheel 169 rotates in the direction in which the tap T bites into the plate material W. That is, if the lead screw 221 is a right-hand screw, the worm wheel 169
By rotating the screw counterclockwise (as viewed from below), the tap T descends while rotating in accordance with the lead of the lead screw 221, and a tapped hole can be formed in the plate material W. The pitch of the tap T and the lead or pitch of the lead screw are the same.

When the tap T penetrates the plate material W and a screw hole is completely formed, the worm wheel 169 is rotated clockwise (as viewed from below) to pull out the tap T from the plate material W.

With the tap T removed from the plate W, the worm wheel 169 stops rotating and at the same time the ram 11 is driven to raise the striker 15 to the top dead center. As a result, the tool holder 203 is pulled back to the initial position by the lifter spring 229 and stopped. In the same manner, the following screw hole processing can be performed. Also, when changing the size of the screw hole, the tapping device 200 equipped with a tap T of a required size is mounted.
Replace with The die exchanging device 77 can be used for exchanging the tapping device.

As described above, since the reduction ratio between the worm gear 171 and the worm wheel 169 is generally large, the rotational speed of the tap T is greatly reduced, and therefore the tap T is driven by a large rotational force, so that the plate It becomes possible to machine large screw holes in a thick plate material.

[0057]

According to the invention described in claim 1, it becomes possible to perform screw hole processing on a plate material having a large plate thickness. Furthermore, if a drill is attached as a tool, it is possible to perform hole drilling with the drill. Also, if a reamer is attached, it is possible to precisely process a rough hole.

Further, since the processing position of the punch press and the processing position of the tapping device are the same position, there is no restriction on the processing range of the tapping process due to the relationship of the moving area of the material positioning device in the punch press. Further, there is an advantage that it is not necessary to stop the entire machine when performing maintenance of the tapping device.

According to the second aspect of the present invention, it is possible to prevent scratches generated on the surface of the plate material when the plate retainer presses the plate material.

[Brief description of drawings]

FIG. 1 is a right side view of a turret punch press equipped with a mold exchanging device according to an embodiment of the present invention.

FIG. 2 is a front view of the turret punch press shown in FIG.

FIG. 3 is a plan view of the turret punch press shown in FIG.

FIG. 4 is a partially enlarged view of a section taken along line IV-IV in FIG.

5 is a partially enlarged view of the arrow V view in FIG.

6 is a partially enlarged view of a cross section taken along line VI-VI in FIG.

7 is a partially enlarged view of a cross section taken along the line VII-VII in FIG.

[Explanation of symbols]

 1 Turret Punch Press 5 Body Frame 5U Upper Frame 5L Lower Frame 11 Ram 15 Striker 25 Worktable 27 Plate Material Moving Positioning Device 35 Work Clamp 45 Subframe 45 (U, L) Upper and Lower Frame 49 Upper Turret 51 Lower Turret 169 Worm Wheel 171 Worm gear 200 Tapping device 201 Tool holding mechanism 203 Tool holder 205 Lower holder 215 Upper holder 217 Collar portion 219 Locking pin 221 Lead screw 223 Driver 225 Driver guide 227 Punch head 229 Lifter spring 237 Key groove 239 Rotation transmission key 245 Plate retainer 246 Brush D Die DH Die holder P Punch PH Punch holder T Tap W Plate material

Claims (2)

[Claims] 1. A worm gear and an annular worm wheel engaging with the worm gear are provided in the mounting holes of the upper and lower turrets for mounting the punch holder and the die holder, respectively, and an index mechanism capable of driving the punch holder and the die holder to rotate is provided. The turret punch press is used as a tapping device, the upper holder is mounted in the mounting hole of the upper turret with its rotation restricted, the lower holder is rotatably supported in the upper holder, and the lower holder is mounted in the lower holder. A tool holder is provided that is slidable in the axial direction and regulates relative rotation with respect to the holder. The nut portion of the tool holder and the driver guide provided in the upper holder cannot rotate but can slide in the axial direction. Screw the lead screw part of the driver provided on the upper part of the driver to the lifter between the punch head and the driver guide installed on the upper end of the driver. A tapping device for a turret punch press, wherein a ring is mounted elastically, and a rotation transmission key provided on the lower holder and a key groove provided on the worm wheel are provided so as to be engageable with each other. 2. The tool holder is provided with a plate pressing member for pressing a plate member, and the plate pressing member is provided with a brush made of a material having a hardness lower than that of the plate member on an end surface facing the plate member. Tapping device for the described turret punch press.