JP3171621B2 - Tool change device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool change device for holding a tool in a holding portion of a tool magazine or releasing a tool.

[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]

The above-mentioned A
A change device that forms part of the TC, and a mold as a tool is detachably mounted on the tool holding portion of the tool magazine. However, the mechanism of the tool change device itself is complicated, and rotation, up, down, left and right are performed. The mold is attached and detached by the movement of.

For this reason, it takes a long time to clamp or release the tool in the tool holding portion of the tool magazine, and the required time has not been reached.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tool change device in which the time for attaching and detaching a tool to and from a tool holding portion of a tool magazine can be reduced in a shorter time than in the prior art.

[0007]

In order to achieve the above object, the present invention provides a tool magazine for supporting a plurality of tools used in a machine tool.
A pair of clamp claws for holding the tool are provided to face each other, and the tool jaws of the tool changer for attaching and detaching the tool to and from the tool holder are gripped from a direction perpendicular to the tool clamping direction of the clamp claws. The tool change device is configured by freely providing the chuck claws so as to pass between the clamp claws.

[0008]

By adopting the tool change device of the present invention, a pair of clamp claws for holding a tool are opposed to each other in a plurality of tool holding portions of a tool magazine. Further, the chuck claws of the tool changer are provided in a direction orthogonal to the tool clamping direction of the clamp claws. Further, the chuck claws are provided so as to pass freely between the clamp claws. Therefore, the tool gripped by the chuck claws of the tool changer is clamped by the clamp claws simply by moving the tool changer in one direction to the tool holding portion of the tool magazine.

[0009]

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

Referring to FIGS. 5, 6 and 7, the turret punch press 1 has a common base 3, on which a portal-shaped main body frame 5 is erected. 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. Moreover, 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 (up and down directions in FIGS. 5 and 6).

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 at appropriate intervals in the Y-axis direction (left and right directions in FIGS. 6 and 7) so as to extend in the Z-axis direction. 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. 7, a carriage base 29 of the plate moving / 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. 5 and the up-down direction in FIG. 7). 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. 7, 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 structure, 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. 9, a semicircular auxiliary table 71 having 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 structure, 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 be moved 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 which supports a punch P to be attached to and detached from the upper turret 49 and is 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. 5, the punch attachment / detachment exchange position PT 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
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. The upper and lower mold changing devices 77U and 77D are vertically moved by vertical operating devices 99 and 101 mounted on the upper and lower frames 45U and 45D of the sub-frame 45.

According to 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 mold exchanging devices 77U and 77D are connected to the vertical
The upper and lower turrets 4 are moved up and down by 9, 101
Punches and die holders PH, D mounted on 9, 51
H is extracted with the chuck claws 95 and 97 and is mounted on the punch and die holder magazines 73 and 75. Next, the clamp claws 91 of the punch and die holder magazines 73 and 75,
Punch and die holders PH and DH are chucked from 93
At 5,97, it is extracted and attached to the upper and lower turrets 49,51. By performing this series of operations, the upper and lower mold exchanging devices 7 are moved between the punch / die attaching / detaching exchange positions PT, DT and the punch / die holder magazines 73, 75.
Since the punch and die holders PH and DH can be directly exchanged by linear movement of the 7U and 77D in the vertical direction, setup and exchange time can be shortened as compared with the related art. 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 of No. 5, as shown in FIGS. 6 and 7,
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 construction of the upper mold exchanging apparatus 77U in the mold exchanging apparatus 77 will be described. The lower mold exchanging apparatus 77D has almost the same configuration, and the movement is only up and down. Is omitted.

In FIG. 10, the upper mold changing device 77U includes a fluid cylinder 189 as a vertical operating device, and the fluid cylinder 189 is attached to an upper frame 45U of a sub-frame 45 (not shown). 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 the lower end of the piston rod 193.
Is provided.

A hole 197 is formed vertically through the piston 191 and the piston rod 193, and a pipe extending in the vertical direction is provided in the hole 197. A piston 201 is provided on the distal end side of the piston rod 193.
A cam follower 203 is provided at the lower end of a pull rod 199 that is provided long from the bottom.

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 95 is attached to one end of the link 207 by the pin 205.

According to 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 95 descends. When hydraulic pressure is supplied to the lower cylinder chamber 213 formed with the piston 191 as a boundary, the piston 191 rises, so that the chuck pawl 95 rises.

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 rotates outward with the pin 205 as a fulcrum, the chuck claws 95 open, and the punch holder PH is unclamped.

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 also 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 95 and clamping the punch holder PH.

As described above, when the chuck jaws 95 are opened or closed at the punch exchange position of the upper turret 49 and the exchange position of the punch holder magazine 73, the punch holder PH is clamped or unclamped by the chuck jaws 95. Will be replaced.

The punch and die holder magazines 73 and 7
Reference numeral 5 denotes a chain member wound around a driving sprocket 83 and a driven sprocket 85, and punches, die holders PH, D
This is a configuration including a plurality of clamp claws 91 and 93 that can freely clamp H. 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. 1 and 2, guides extending in the Y-axis direction (a direction perpendicular to the paper surface in FIG. 2) are provided above and below the upper frame 45U of the sub-frame 45. Members 219U and 219D are provided, and upper and lower chain members 79U and 79D of the chain member 79 are guided by the guide members 219U and 219D to be 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 vertically in FIG. 2 is mounted on the second clamp member 229.
One end of the link 233 is fitted to the pin 231, and the other end of the link 233 is mounted on the upper end of the pin 235. The clamp body 2 is located below the pin 235.
The base 237 </ b> B of the 37 is fitted, and the clamp claw 91 is pivotally supported on the base 237 </ b> B of the clamp body 237 so as to be openable and closable.

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.

A stopper member 2 is attached to the distal end (the upper right and lower end in FIG. 1) of the clamp body 237 by a pin 243.
45 is pivotably supported and a leaf spring 247 is provided.
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, Figure 1 against the biasing force of the plate spring 247 stopper member 245 as a fulcrum pin 243 At the outside.

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 main body 237 is positioned at the replacement position by the driving of the chain members 79U and 79D, and the punch claw 91 provided on the clamp main body 237 holds the punch holder PH as shown in FIG. , In a clamped state. In this state, when the chuck claws 95 provided in the upper mold exchanging device 77U are opened, they descend from above in FIG.
As shown in (A), it enters the front and rear ends of the clamp body 237 and is positioned.

[0044] In this state, as shown in FIG. 4 (A), the plate spring 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 of the stopper member 245 24
7 is turned outwardly against the urging force of No. 7. Therefore, the stopper member 245 comes off the tip of the clamp claw 91.

In the state shown in FIG. 4A, the chuck claws 95 are closed. That is, the chuck claws 95 move inward in the left-right direction. 4 by the cam 95C ₂ of the chuck claws 95 as shown in (B) is moved in the lateral direction along the cam 91C of the clamp jaws 91, clamp jaws 91
Is opened outward against the urging force of the spring 241 with 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, with the chuck claws 95 lowered in an empty state, 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 Figure 4
The state shown in FIG. In this state, the chuck claw 95
Is opened, the state shown in FIG.
1 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.

[0052]

As will be understood from the above description of the embodiment, according to the present invention, since the construction is as described in the claims, the tool changer is provided in the tool holding portion of the tool magazine. The tool can be changed at a high speed, so that the tool can be held or released in a shorter time than before. In addition, since the tool changer can be performed in one direction and one operation, the mechanism of the tool changer can be simplified.

[Brief description of the drawings]

FIG. 1 shows a main part of the present invention; FIG.
It is an arrow view along the line.

FIG. 2 shows an example of a punch holder magazine in FIG.
It is an enlarged view along the II-II line.

FIG. 3 is a perspective view showing only one portion of a clamp claw in FIG. 1;

FIG. 4 shows a punch holder moving from a chuck jaw to a clamp jaw.
It is an explanatory view of an operation of delivering from a clamp claw to a chuck claw.

FIG. 5 is a right side view of a turret punch press provided with a mold exchanging apparatus according to an embodiment of the present invention.

FIG. 6 is a front view of FIG.

FIG. 7 is a plan view of FIG.

FIG. 8 is an enlarged view taken along line VIII-VIII in FIG.

FIG. 9 is an enlarged view of a portion viewed from an arrow IX in FIG. 7;

FIG. 10 is a sectional view showing an embodiment of an upper mold exchanging apparatus.

[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 P Punch D Die

Claims (1)

(57) [Claims] 1. A tool magazine for supporting a plurality of tools used in a machine tool, a plurality of tool holding portions provided with a pair of clamp claws opposed to each other for holding the tools, It is preferable that the chuck pawl of the tool changer for performing attachment / detachment is provided so as to freely grip the tool from a direction perpendicular to the tool clamping direction of the clamp pawl, and the chuck pawl is provided so as to be able to pass between the clamp pawls. Characterized tool change device.