JP3167758B2 - Punch press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch press provided with a tool magazine in a sub-frame adjacent to a punch press body.

[0002]

2. Description of the Related Art A conventionally known turret punch press has a rotatable upper turret in which a punch is detachably supported and is detachably supported, and a die for working a plate material in cooperation with the punch. A rotatable lower turret, a vertically movable striker that presses a punch indexed to a processing position, and a work table that supports a plate material processed by the punch and the die, and can be moved and positioned in the X and Y axes directions. And a plate material movement positioning device. Then, punching of various shapes and sizes has been performed on the plate material by selecting a necessary punch and die from a plurality of punches and dies mounted on the upper and lower turrets.

[0003] However, the number of punches and dies mounted on the upper and lower turrets is restricted by the size of the upper and lower turrets. For this reason, turret punch presses having a so-called die changing device (ATC) in which a tool magazine and a die changing device are arranged adjacent to the turret punch press are already well known. This ATC
Various mechanisms have been known so far, such as a rotary tool magazine, a rotary back and forth moving method, and a cylindrical coordinate type robot method.

[0004]

By the way, as described above, the die changing device is disposed adjacent to the punch press main body, and the tool magazine is disposed on the side opposite to the punch press main body in the die exchanging device. It is common. Therefore, a mold holder in which the mold in the tool magazine is mounted is held by the mold exchanging device, and this mold holder is rotated or moved to the turret in the punch press body, and then released and mounted on the turret. A mold exchange is performed.

[0005] Therefore, it takes time to set up and change the mold. In addition, they cannot cope with high-mix low-volume production and flexible automation.

SUMMARY OF THE INVENTION It is an object of the present invention to improve the above-mentioned problems by shortening the setup time and the time required for changing the molds, and at the same time, in order to cope with high-mix low-volume production and flexible automation. To provide an improved punch press for horizontally disposing a tool magazine in a sub-frame adjacent to a punch frame.

[0007]

In order to achieve the above object, the present invention provides a sub-frame provided adjacent to a punch, a die and a punch press body provided with a striker capable of pressing the punch. In a punch press in which a tool holder supporting a punch and a die to be exchanged are detachably mounted on a tool magazine supported by a frame, the tool magazine is provided on an endless chain which is horizontally movable. The sub-frame is provided with a tool exchanging device for exchanging a punch and a die with respect to the punch press body.

[0008]

[0009]

With the use of the punch press of the present invention, the punch press body is provided with a punch, a die and a striker capable of pressing the punch. A subframe is provided adjacent to the punch press body,
A tool magazine in which a tool holder supporting a punch and a die to be exchanged is detachably mounted on the subframe is horizontally arranged.

[0010] Further, a tool changing device for exchanging a punch and a die in the sub-frame is provided.

Therefore, the punch and the die are exchanged between the punch press body and the tool magazine, for example, by moving the tool exchanging device up and down in a shorter time than before.

[0012]

An embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIGS. 1, 2 and 3, the turret punch press 1 has a common base 3, on which a portal-shaped main body frame 5 stands. The main body frame 5 includes an upper frame 5U having an opening 7 and a lower frame 5D. A disk support 9 which receives a pressing force is provided at a processing position on the lower frame 5D.

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 unit 13 such as a crank drive or a 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).

When the driving device 13 is driven by the above configuration, the ram 11 is guided by the ram guide member 17 and
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 5D of the main body frame 5 so as to extend in the Z-axis direction at appropriate intervals in the Y-axis direction (left and right directions in FIGS. 2 and 3). A support frame 21 is provided on the plurality of brackets 19. A work table 25 is connected to each support frame 21 via a plurality of balls 23.
Is provided movably in the Y-axis direction. The work table 25 has a configuration in which side tables 25S are provided on both sides of a fixed center table 25C.

On the upper 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 College 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 movable in the X-axis sail direction via a nut member. Further, 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 mounted on the output shaft of the X-axis motor 37. On the other hand, a driven pulley 41 is mounted on one end of the ball screw 31, and a timing belt 43 is wound around the driven pulley 41 and the driving pulley 39.

When the Y-axis drive motor (not shown) is driven by the above configuration, the side table 25S is moved in the Y-axis direction via the carriage base 29 via the balls 23 supported by the support frame 21. Will be.
When the X-axis drive motor 37 is driven, the ball screw 31 is rotated via the drive pulley 39, the timing belt 43, and the driven pulley 41, so that the carriage 33 moves in the X-axis direction via the nut member. Will be done. Therefore, the plate material W clamped by the work clamp 35 is moved in the X and Y axis directions, and the desired position of the plate material W is positioned at a processing position below the striker 15.

A sub-frame 45 adjacent to the main frame 5 stands on the common base 3. The sub-frame 45 includes an upper frame 45U and a lower frame 45.
It has a C-shaped structure made of D. For example, a rectangular upper turret 49 rotatable via an upper rotary shaft 47U is provided below the upper frame 45U, and a long turret 49 which is rotatable via a lower rotary shaft 47D is provided above the lower frame 45D. A rectangular lower turret 51 is respectively supported.

Punches P are provided on both sides of the upper turret 49.
Are mounted detachably, and on both sides of the lower turret 51, a die holder DH having a die D mounted at a position corresponding to the punch P is detachably mounted. Further, inside the upper and lower frames 45U and 45D, for example, a fluid cylinder 5 as a rotation driving means for rotating the upper and lower rotating shafts 47U and 47D in FIG.
3U, 53D; 55U; 55D are provided, and racks 61U, 61D; 63U, 63D are integrated with the distal ends of piston rods 57U, 57D; 59U, 59D mounted on the fluid cylinders 53U, 53D; 55U, 55D. Is provided. The racks 61U, 61D; 63
U and 63D are engaged with pinions 65 and 67 fitted to the upper and lower rotating shafts 47U and 47D, respectively.

With the above configuration, the fluid cylinders 53U, 5U
When the 3D; 55U, 55D is operated, the piston rods 57U, 57D; 59U, 59D are moved in the left-right direction in FIG.
The upper and lower rotating shafts 47U and 47D are rotated in the same direction via the U and 63D and the pinions 65 and 67 in synchronization with each other. Therefore, the structure is simple and
The lower turrets 49 and 51 can be rotated at high speed and can be manufactured at low cost. In addition, as the rotation driving means, the upper and lower rotation shafts 47U and 47D may be rotated by a driving motor, a worm, and a worm wheel.

As shown in FIG. 5, a semicircular auxiliary table 71 provided with a support member 69 such as a brush for supporting the plate material W is provided on a side portion of the lower turret 51. Therefore, the downward forming process can be performed, and the scratches generated on the plate material W when the lower turret 51 rotates can be reduced.

With the above configuration, the upper and lower rotating shafts 47U,
By the rotation of 47D, the upper and lower turrets 49 and 51 are indexed and the selected punch P and die D are positioned at the processing position. Next, the punching process is performed at a desired position of the plate material W in cooperation with the punch P and the die D by the vertical movement of the striker 15.

As described above, this punching process is performed by the operation of the ram 11 which can move up and down. The heat generated by this operation fills the upper frame 5U and the upper frame 45U of the sub-frame 45. It is released without heat transfer to the part. That is, the thermal displacement generated in the upper and lower turrets 49 and 51 is
Since the upper and lower frames 45U and 45D support the upper and lower frames 45U and 45D, only the rotational heat of the upper and lower turrets 49 and 51 is generated. I don't have to.

A punch holder magazine 73 supporting a punch P to be attached to and detached from the upper turret 49 is provided adjacent to the upper and lower frames 45U and 45D in FIG. 51
And a die holder magazine 75 supporting a die D to be detached and replaced. The upper turret 49
As shown in FIG. 1, the punch attachment / detachment exchange position PT of the lower turret 51 is located below the punch holder magazine 73, and the die attachment / detachment exchange position DT of the lower turret 51 is also shown in FIG. In order to be located above the die holder magazine 75,
Lower die changing devices 77U and 77D are arranged in the vertical direction of the punch and die changing positions PT and DT.

The punch and die holder magazines 73 and 7
5, the endless chain members 79 and 81 are wound around a driving sprocket 83 and a driven sprocket 85, respectively, as shown in FIG. Drive motors 87 and 89 such as servo motors are interlockedly connected to the drive sprocket 83. A plurality of endless clamp claws 91, 93 for clamping the punch and die holders PH, DH are attached to the chain members 79, 81, respectively.

At the lower part of the upper and lower mold exchanging devices 77U and 77D, chuck claws 95 and 97 for clamping the punches and die holders PH and DH are provided. Further, the upper and lower mold exchanging devices 77U and 7 are driven by drive motors 99 and 101 for a changer such as servo motors mounted on the upper and lower frames 45U and 45D of the sub-frame 45.
7D is moved up and down.

With the above configuration, while the punching process is performed on the plate material W in cooperation with the punch P and the die D at the processing position, the punch and the die attaching / detaching exchange positions PT and DT are
The upper and lower die changing devices 77U and 77D are driven by the drive motor 99,
The upper and lower turrets 49,
The punches and die holders PH and DH mounted on the 51 are pulled out with the chuck claws 95 and 97 and mounted on the punch and die holder magazines 73 and 75. Next, the punches and die holders PH and DH are removed from the chuck claws 95 and 9 by the clamp claws 91 and 93 of the punch and die holder magazines 73 and 75.
7 and are attached to the upper and lower turrets 49 and 51. By performing this series of operations, the upper and lower mold exchanging devices 77U, 77U, between the punch / die attaching / detaching exchange positions PT, DT and the punch / die holder magazines 73, 75.
Since the punch and the die holders PH and DH can be directly exchanged by linear movement of the 77D in the vertical direction, setup and exchange time can be shortened as compared with the conventional case. Therefore, it is possible to cope with high-mix low-volume production and flexible automation, and it is also possible to perform unmanned operation.

The punch and die holder magazines 73 and 7
In the replacement position 5 as shown in FIGS. 2 and 3,
An ordinary mold exchanging device 103 having two arms and a tooling tower 105 which are already known are arranged. The mold exchanging device 103 has a clamp claw 109 attached to the tip of two arms 107 and can be rotated by 90 and 180 degrees. Since the structure is already known, detailed description is omitted. . The tooling tower 105 is also provided with a plurality of clamp claws 113 on the outer periphery of the cylindrical member 111, and the clamp claws 113 have punches, die holders PH,
DH is clamped. The cylindrical member 111 is rotatable and vertically movable. That is, the cylindrical member 111 is moved up and down by the operation of the fluid cylinder 115, and the drive pulley 1 is driven by the servo motor 117.
19, a timing belt 121, and a driven pulley 123 to rotate. Therefore, the punch and die holder magazines 73 and 75 and the tooling tower 1
Between 05 and 05, the die and die holders PH and DH are exchanged by the mold exchanging device 103.

The specific configuration of the upper die changing device 77U in the die changing device 77 will be described. The lower die changing device 77D has almost the same configuration, and the movement is only ascending and descending. Is omitted.

Referring to FIGS. 6, 7 and 8, the drive motor 99 is mounted on the upper frame 45U of the sub-frame 45, and a drive pulley 125 is mounted on the output shaft of the drive motor 99. Have been. A support block 127 is attached to the upper frame 45U, and a rotation shaft 129 extending in the Z-axis direction (up-down direction) is mounted on the support block 127. A driven pulley 131 is attached to the upper end of the rotating shaft 129. The driven pulley 131 and the driving pulley 125
, A timing belt 133 is wound.

With the above configuration, when the drive motor 99 is driven, the drive pulley 125 is rotated via the output shaft. The rotation of the driving pulley 125 causes the rotation shaft 129 to rotate via the timing belt 133 and the driven pulley 131.

A spindle 135 extending in the Z-axis direction is fitted on the rotating shaft 129.
A spiral grooved cam 1 having a constant pitch is provided on the outer peripheral surface of 35.
37 are formed. Horizontal grooves 139 and 141 connected to the upper and lower portions of the cam 137 are formed in the spindle 135. A hollow cylindrical member 143 is fitted to a lower portion of the spindle 135, and the hollow cylindrical member 143 is provided with a cam follower 145.

On both sides of the support block 127, support plates 147R and 147L extending in the vertical direction are provided so as to hang down.
Guide members 149 composed of a plurality of rotatable rollers are supported above and below L. The clamp body 151 is provided so as to be guided by the guide member 149 and movable in the Z-axis direction.

The clamp body 151 is provided with a support block 153. The support block 153 is provided with a cam follower 155 which engages with the cam 137 and is rotatable along the cam surface of the cam 137. I have.

Grooves 157 and 159 are formed in the upper and lower portions of the clamp body 151, respectively.
9 are engagement blocks 165 and 167 having cams 161 and 163 respectively engageable with the cam follower 145.
Are engaged. The cams 161 and 163 are shaped, for example, as shown in FIGS.

The engaging blocks 165 and 167 are provided on a pull rod 169 as a pulling member extending in the Z-axis direction, and grooves 171 are provided at appropriate intervals below the pull rod 169. A plunger 173 that engages with the groove 171 and positions the clamp body 151 is provided on the clamp body 151.

A support frame 175 is provided at the lower end of the clamp body 151.
A slide member 177 integrated with the pull rod 169 is provided at the lower part of the fifth member movably in the Z-axis direction. One end of a plurality of links 179 is fixed to the slide member 177 by pins 181. The other end of the link 179 is fixed to one end of the collet 185 by a pin 183. The other end of each collet 185 is connected to the support frame 175.
Are rotatably supported by pins 187. Further, the base of the chuck claw 95 is attached to each collet 185.

With the above configuration, when the rotating shaft 129 is rotated, the spindle 135 is rotated in the same direction. The cam follower 155 engaged with the cam 137 formed on the spindle 135 rolls along the cam 137 due to the rotation of the spindle 135, so that the clamp body 15
1 will be moved up and down.

When the cam follower 155 enters the horizontal grooves 139 and 141 connected to the upper and lower portions of the cam 137, the clamp body 151 is stopped at the upper end or the lower end. When the clamp body 151 is stopped at the upper end or the lower end, the second cam follower 145 fits into the cam 163 or 161.

For example, when the second cam follower 145 is fitted into the cam 163 with the clamp body 151 at the upper end, as shown in FIG. Stop at the dashed line. That is, when the pull rod 169 is lifted upward in this state, the link 179 rotates upward in FIG.
By rotating outward with the fulcrum 7 as a fulcrum, the chuck claws 95 are unclamped from the punch holder PH.
Then, the spindle 135 is reversed and the clamp body 1 is rotated.
When the 51 is lowered from the upper end, the cam follower 145 returns to the position indicated by the solid line in FIG.
Does not move, the chuck claw 95 is lowered in the unclamped state.

In FIG. 9B, when the cam follower 145 is at the position indicated by the two-dot chain line and the spindle 135 is slightly rotated in the same direction, the cam follower 145
3 to the position indicated by the dotted line,
Moves downward. That is, when the pull rod 169 moves downward, the link 179 pivots downward with the pin 183 as a fulcrum, and the collet 185 pivots inward with the pin 187 as a fulcrum. PH will be clamped. When the clamp body 151 is lowered in this state, the punch holder PH is lowered with the chuck claws 95 clamping the punch holder PH.

Similarly, when the second cam follower 145 is fitted into the cam 161 even when the clamp body 151 is at the lower end, as shown in FIG.
Move downward along the surface of and stop at the position indicated by the two-dot chain line. That is, in this state, when the pull rod 169 moves down, the punch claw 95 causes the punch holder P to move downward.
H is clamped. Also, in FIG. 9A, the cam follower 145 is located at the
When the 35 is slightly rotated in the same direction, the cam follower 145 moves along the surface of the cam 161 to the position indicated by the dotted line,
The pull rod 169 moves upward. That is, when the pull rod 169 moves upward, the chuck pawl 9
5 is unclamped from the punch holder PH as described above.

Punch holder PH with upper mold changing device 47U
Is exchanged between the upper turret 49 and the punch holder magazine 73. First, it is assumed that the punch holder PH is mounted at the punch exchange position PT of the upper turret 49 and the chuck claws 95 are in the unclamped state (released state). In this state, when the drive motor 99 is driven to rotate the spindle 135, the clamp body 151 is lowered and the second cam 161 is moved to the cam follower 145.
9 and further moves along the surface of the cam 161 to
When the position of the two-dot chain line shown in (A) is reached, the pull rod 169 descends and clamps the punch holder PH with the chuck claws 95.

When the spindle 135 is reversed in this state, the clamp body 151 rises, the second cam 163 engages with the cam follower 145, and further moves along the surface of the cam 163, as shown in FIG. When it reaches the position indicated by the two-dot chain line, the pull rod 169 rises and the chuck pawl 95
Is unclamped, and the punch holder PH is mounted on the punch holder magazine 73.

Next, the punch holder magazine 73 is rotated to position a new next punch holder PH at the replacement position. In this state, when the spindle 135 is moved in the same direction and the cam follower 145 comes to the position indicated by the dotted line in FIG. 9B, the pull rod 169 descends, the chuck claws 95 close, and the punch holder PH is clamped.

In this state, the clamp body 151 is lowered to engage the second cam follower 145 with the cam 161. In this state, the punch holder PH clamped to the chuck claws 95 is mounted on the upper turret 49.

When the second cam follower 145 reaches the position indicated by the two-dot chain line in FIG. 9A with the punch holder PH mounted on the upper turret 49, the pull rod 169
Is lowered, the chuck claw 95 is unclamped from the punch holder PH, and the spindle 135 is rotated in the reverse direction. As a result, the clamp body 151 is lifted with the chuck claw 95 opened, and a series of mold replacement is performed. Will be.

Therefore, the use of the mold exchanging device 47 eliminates the need for servomotor control, signals for limit switches, sequences, and the like, thereby enabling fast and reliable mold exchanging. In addition, the action of the force of the chuck claw 95 can be surely held in one direction and one operation. In the above embodiment, the cam follower 145 is provided on the pull rod 169 side and the second
The cams 161 and 163 may be provided on the cam 135 side.

FIG. 10 shows a specific configuration of another embodiment of the upper die changing device 47U in the die changing device 47. Note that the configuration of the lower die changing device 47D is almost the same, and the movement is ascending and descending only substituting for descending and ascending.

In FIG. 10, the upper mold exchanging device 47U includes a fluid cylinder 189.
89 is an upper frame 45 of the sub-frame 45 not shown.
It is attached to U. A piston 191 is provided in the fluid cylinder 189, and a piston rod 193 that extends in the vertical direction projects below the piston 191 and is integrated therewith. A support block 195 is provided at a lower end of the piston rod 193.

A hole 197 is formed vertically through the piston 191 and the piston rod 193, and a pull rod 199 extending vertically is provided in the hole 197. A piston 201 is integrated in the middle of the pull rod 199, and a cam follower 203 is provided at a lower end of the pull rod 199.

One end of a link 207 is attached to both ends of the support block 195 by pins 205, and the other end of the link 207 is engaged with the cam follower 203. Further, the upper end of the chuck claw 209 is attached to one end of the link 207 by the pin 205.

With the above configuration, when hydraulic pressure is supplied to the upper cylinder chamber 211 formed with the piston 191 as a boundary, the piston rod 193 descends via the piston 191 and the chuck pawl 209 descends.
When hydraulic pressure is supplied to the lower cylinder chamber 213 formed with the piston 191 as a boundary, the chuck 209 is raised by raising the piston 191.

When hydraulic pressure is supplied to the upper cylinder chamber 215 formed with the piston 201 as a boundary, the piston 2
01 descends, the cam follower 203 descends via the pull rod 199, and the link 2
07 is rotated outward with the pin 205 as a fulcrum, and the chuck claws 209 are opened to be unclamped from the punch holder PH.

When hydraulic pressure is supplied to the lower cylinder chamber 217 formed with the piston 201 as a boundary, the piston 201 rises and the pull rod 199 rises.
Therefore, the rise of the cam follower 203 causes the link 207 to rotate inward with the pin 205 as a fulcrum, thereby closing the chuck claws 209 and clamping the punch holder PH.

As described above, when the chuck jaws 209 are opened or closed at the punch replacement position of the upper turret 49 and the replacement position of the punch holder magazine 73, the punch holder PH is moved to the chuck claw 209.
Will be clamped or unclamped and replaced. Therefore, an effect similar to that of the above-described embodiment can be obtained.

The punch and die holder magazines 73 and 7
5 is a driving sprocket 83 as shown in FIG.
And a chain member 83 wound around the driven sprocket 85 for traveling. Since the specific configuration of the die holder magazine 75 is substantially the same as the specific configuration of the punch holder magazine 73, the punch holder magazine 73 will be described and the description of the die holder magazine 75 will be omitted.

More specifically, as shown in FIGS. 11 and 12, the upper frame 45U
Guide members 219U, 21 extending in the Y-axis direction (the direction orthogonal to the paper surface in FIG. 11)
9D, the guide members 219U, 21
9D has upper and lower chain members 79U, 7
9D is guided and driven to travel.

The vertical frame of the upper frame 45U is provided with a block member 221 extending in the Y-axis direction, and a plurality of rollers 223 are rotated and guided on the lower surface of the block member 221. . Each roller 223 has a first clamp member 225 attached thereto. Pins 22 are provided above and below the first clamp member 225.
A second clamp member 229 is provided on the opposite side via 7, and the second clamp member 229 and the first clamp member 225 are fixed with a plurality of bolts. Moreover, the first and second clamp members 225 and 229 are clamped by the upper and lower chain members 79U and 79D.

A pin 231 extending in the vertical direction in FIG. 11 is attached to the second clamp member 229. One end of a link 233 is fitted to this pin 231 and the other end of the link 233 is a pin. 235. A base 237B of the clamp body 237 is fitted to a lower portion of the pin 235, and a clamp claw 91 is pivotally supported on the base 237B of the clamp body 237 so as to be freely opened and closed.

On the base 237B side of the clamp body 237, the block member 2 is positioned at the same height as the clamp claws 91.
A plurality of springs 241 are interposed between the inside of the distal end of the block member 239 and the plurality of grooves 91H formed in the clamp claw 91 to always urge the clamp claw 91 inward. I have.

The tip of the clamp body 237 (FIG. 12)
A stopper member 245 is pivotally supported by a pin 243 at the upper right and lower ends of the plate spring 243.
7 is provided. A cam 245C is formed at the tip of the stopper member 245 as shown in FIG. That is, the cam 95C ₁ formed at the tip of the chuck claws 95 in the upper mold changer 77u, the cam 245C is guided, leaf spring 247 stopper member 245 is a pin 243 as a fulcrum
12 is turned outward in FIG.

A clamp cam 91C is formed on the rear inner surface of the clamp claw 91. This clamp cam 9
1C is adapted to open against the biasing force of the spring 241 as a fulcrum the chuck claws 95 cam 95C ₂ formed on pressed and clamp jaws 91 pin 235.

With the above configuration, the clamp body 237 is positioned in the replacement device by the driving of the chain members 79U and 79D, and the punch holder PH is held by the clamp claws 91 provided on the clamp body 237 as shown in FIG. , In a clamped state. In this state, with the chuck claws 95 provided in the upper mold exchanging device 77U being opened, it descends from above in FIG.
As shown in (A), it enters the front and rear ends of the clamp body 237 and is positioned.

[0067] In this state, as shown in FIG. 14 (A), the plate as a fulcrum stopper member 245 is a pin 243 by the cam 95C ₁ of the chuck claws 95 are lowered along the cam 245C ₁ of the stopper member 245 It is turned outward against the urging force of the spring 247. Therefore, the stopper member 245 comes off the tip of the clamp claw 91.

In the state shown in FIG. 14A, the chuck claws 95 are closed. That is, the chuck claws 95 move inward in the left-right direction. As shown in FIG. 14B, the cam 95C _{2 of the} chuck claw 95 is
, The clamp claw 91 is opened outward against the urging force of the spring 241 around the pin 235 as a fulcrum.

Thus, the punch holder PH has the clamp claws 9
1 and is clamped by the chuck claws 95. That is, the punch holder PH
Is directly moved from the clamp claw 91 to the chuck claw 9 by linear motion.
5 will be delivered.

The punch holder PH clamped by the chuck claw 95 descends and is mounted on the upper turret 49 at the punch attachment / detachment exchange position PT. After the punch holder PH is mounted on the upper turret 49, the chuck claws 95 are raised in an empty state and returned to the original position.

Further, the chuck claw 95 is lowered in an empty state, and the punch holder P mounted on the upper turret 49 is moved downward.
When the H is clamped at the punch attachment / detachment replacement position and lifted and stopped at the position of the clamp claw 91, the chuck claw 9
Cam 95C ₂ of 5 rotates the stopper member 245 through the cam 245C cam 95C ₁ is of the stopper member 245 with push the cam 91C of the clamp jaws 91 14
The state shown in FIG. In this state, the chuck claw 95
14A, the state shown in FIG. 14A is reached, and the clamp claw 91 is closed by the urging force of the spring 241 with the pin 235 as a fulcrum.

Therefore, the punch holder PH is transferred from the chuck pawl 95 to the clamp pawl 91 and
Is clamped to. When the chuck pawl 95 further moves up to the original position, the stopper member 245 is rotated inward about the pin 243 as a fulcrum by the urging force of the leaf spring 247, and the clamp pawl 91 is fixed.

As described above, the chuck claws 95 and the clamp claws 91 are positioned at right angles, and
The linear movement of the punch holder PH makes the chuck claw 95
From the clamp claw 91, or from the clamp claw 91 to the chuck claw 95. Therefore, the chuck claws 95 and 97 in the mold exchanging device 77 can pass through the punch and die holder magazines 73 and 75, can be forcibly released, and can secure a space saving advantageous for a design such as high-speed changing.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes.

[0075]

As will be understood from the above description of the embodiments, according to the present invention, since the structure described in the claims is adopted, the next punch and die can be formed during punching. The supported punch and die holders can be exchanged at a high speed, can be performed in a short time, and the setup time can be shortened. In addition, it becomes possible to cope with high-mix low-volume production and flexible automation.

[Brief description of the drawings]

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

FIG. 2 is a front view of FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is an enlarged view taken along the line IV-IV in FIG. 2;

FIG. 5 is an enlarged view of a portion viewed from an arrow V in FIG. 3;

FIG. 6 is an enlarged view of a part viewed from the arrow VI in FIG. 2;

FIG. 7 is a view taken along the line VII-VII in FIG. 6;

FIG. 8 is an example of an upper mold exchanging apparatus;
It is sectional drawing along the VIII line.

FIG. 9 is an example diagram of a cam shape in an engagement block attached to a pull rod.

FIG. 10 is a sectional view showing another embodiment of the upper die changing device.

11 is an enlarged view of one example of a punch holder magazine, taken along line XI-XI in FIG. 3;

FIG. 12 is a view taken along the line XII-XII in FIG.

FIG. 13 is a perspective view showing only one portion of the clamp claw in FIG. 12;

FIG. 14 is an explanatory diagram of an operation of transferring a punch holder from a chuck nail to a clamp nail or from a clamp nail to a chuck nail.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Turret punch press 5 Main frame 5U, 5D Upper and lower frame 11 Ram 15 Striker 25 Work table 27 Plate moving and positioning device 35 Work clamp 45 Subframe 45U, 45D Upper, lower frame 49, 51 Upper, lower turret 71 Auxiliary table 73 , 75 Punch, Die Holder Magazine 77 Die Changer 77U, 77D Upper and Lower Die Changer 91, 93 Clamp Claw 95, 97 Chuck Claw

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-2-151324 (JP, A) JP-A-3-118930 (JP, A) JP-A-4-91828 (JP, A) JP-A-4-11828 94823 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21D 37/04 B21D 28/36

Claims (1)

(57) [Claims] 1. A subframe is provided adjacent to a punch, a die and a punch press body provided with a striker capable of freely pressing the punch, and a punch and a die to be replaced are mounted on a tool magazine supported by the subframe. In a punch press in which a supported tool holder is removably mounted, the tool magazine is provided in an endless chain which is provided to be horizontally movable, and a punch and a die for a punch and a die are provided with respect to the punch press body. A punch press, characterized in that a tool changing device for performing attachment / detachment exchange is provided on the sub-frame.