JP2002210523A - Punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply and surely performe interruption and connection of drive transmission to a die rotating supporting device by corresponding to the slide of a die holder without using a separate mechanism. SOLUTION: In a puntch press which has a punch holder and a die holder 103 for holding and on which one side of the punch holder or the die holder is fixed to a frame and the other is provided freely slidably in the horizontal direction, the die rotating and supporting device with which the die is feely rotationally divided is provided on the die holder which is freely slidable, a control motor for rotationally driving the die rotating and supporting device is provided on the outside of the die holder and also a clutch device for freely performing the connection and interruption of transmission to the die rotating supporting device is provided on the control motor. In the clutch device, a recessed groove 187 is provided on one of a driving shaft and a driven shaft 185 and a projecting groove 183 which is freely engaged with and disengaged from the recessed groove is provided on the other and, when the die holder is attached to and detached from the frame, the rotational position where the engaging contact faces of the recessed groove and the projecting groove are approximately horizontal is set in the in the reference position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch press for processing a thin plate, comprising a die holder detachable from a main body frame and a rotary die supporting device capable of rotating and indexing a die. .

[0002]

2. Description of the Related Art Conventionally, a punch press for forming a hole in a sheet metal, molding, or the like is processed by a pair of upper and lower molds each composed of a punch and a die. Machine types are roughly classified into a turret punch press in which a mold holder is a rotating turret (hereinafter, referred to as a "turret punch press") and a turret punch press in which a large number of dies are stored. Both types play an active role in the sheet metal processing industry, but turret punch presses that can store more dies and reduce the number of die changes are the mainstream.

In a turret punch press, when a mold rotation supporting device is used, a rotational driving force is transmitted from a drive motor provided on the frame side to a mold rotation supporting device in the turret via a transmission shaft, a clutch, and the like. Mold rotation. The turret is positioned at a predetermined position, one of the clutch gears is moved up and down by a cylinder or the like to connect, and after rotating the mold rotation supporting device, the clutch is again shut off by the cylinder and the mold rotation supporting device is held. The die to be processed is indexed to the processing position and processed.

However, the indexing speed is relatively slow for the convenience of indexing the mold by rotating and positioning a large rotating member called a turret. In addition, no mold mounting holes are formed in the rotating turret from the center of the turret with an accuracy of the order of microns. However, there is a problem that the centering can meet the required accuracy of micron order and the accuracy cannot be obtained. Therefore, in order to pursue higher precision, a processing machine based on a punch press having a fixed mold holder is required. In a punch press in which the mold holder is a fixed type, there has hardly been an example in which a mold rotation supporting device provided in a conventional turret punch press is mounted.

[0005]

The present invention relates to a punch press in which a die holder is fixed on a die holder which is slidable in a horizontal direction in a punch press fixed to a die holder. When sliding the mold holder, once shut off the drive transmission mechanism from the drive device provided outside the mold holder, and then connect the drive transmission mechanism again when mounting the mold holder, and mount It is necessary to be able to transmit rotational power to the completed mold rotation support device. The mechanism used in conventional turret punch presses was to disconnect and connect the driving force by moving one of the clutch gears up and down with a cylinder or the like. And the mechanism was complicated.

Therefore, in the present application, in the interruption and connection of the drive transmission to the mold rotation supporting device, the operation is simply and reliably performed according to the slide of the mold holder without using a separate mechanism such as a cylinder. It is intended to do so.

[0007]

To achieve the above object, a punch press according to the present invention has a punch holder for holding a plurality of punches and a die holder for holding a die corresponding to the punch. In a punch press in which one of a punch holder and a die holder is fixed to a frame and the other is slidably provided in a horizontal direction, a die rotation support device is provided on the slidable die holder, the die being rotatable and indexable. A control motor for rotationally driving the mold rotation support device is provided outside the mold holder,
A clutch device capable of transmitting / disconnecting the control motor to / from the mold rotation supporting device is provided, and the clutch device is provided with a groove on one of a drive shaft and a driven shaft, and the other is detachable with the groove on the other. A convex groove, wherein when the mold holder is attached to and detached from the frame, a rotational position at which an engagement contact surface of the concave groove and the convex groove is substantially horizontal is set as a reference position. It is.

Accordingly, when the mold is rotationally indexed by the mold rotation support device provided on the die holder detachable from the frame of the punch press, the drive shaft and the driven shaft are connected by the clutch device. That is, the drive shaft and the driven shaft are connected by engaging the concave portion provided at the end of one of the drive shaft and the driven shaft with the projection provided at the end of the other shaft, and controlling the drive shaft and the driven shaft. The drive shaft and the driven shaft are rotated by the motor to index the die. Further, when pulling out the die holder from the frame of the punch press, the drive shaft and the driven shaft can be separated from each other in accordance with the direction of the groove and the protrusion in the pull-out direction of the die holder which is the reference position.

According to a second aspect of the present invention, in the punch press according to the first aspect, when the die holder is attached to or detached from the frame, the driven shaft is fixed and released in conjunction with the attachment / detachment. And a driven shaft locking device.

Therefore, when the die holder is pulled out from the punch press frame, the driven shaft locking device fixes the driven shaft separated from the drive shaft so as not to rotate. When the die holder is set on the frame of the punch press and the driven shaft lock device is released, the driven shaft can rotate together with the drive shaft.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

1 to 3 show the entirety of a punch press 1 according to the present invention. The high-precision punch press 1 employs a structure that minimizes bending and vibration of the entire structure during processing. That is, four thick rigid columns 7 are fixed to the front, rear, left and right ends of a thick base plate 5 provided on the upper surface of the base 3 by bolts 9, and a ceiling frame 11 Are fixed by bolts 13. A recess 15 (see FIG. 7) is provided at the center of the front side of the base plate 5, so that a space for the lower surface of the die holder, which will be described later, is gained, so that the operator can easily perform a die changing operation.

On the upper surface of the ceiling frame 11, reinforcing ribs 17 are provided in the front, rear, left and right directions, and an opening 19 is provided in the center of the reinforced ceiling frame 11. Reinforcing ribs 17 on the rear side (right side in FIG. 2) of the ceiling frame 11
A driving motor 21 for pressing is provided with the rotating shaft 23 facing upward, and a driving pulley 25 is attached to the rotating shaft 23.

In the opening 19 of the ceiling frame 11, a driving ball screw 29 rotatably supported by a strong bearing 27 against vertical external force is provided extending in the vertical direction. A driven pulley 31 is attached to an upper end portion of 29. A belt 33 is wound around the driven pulley 31 and the driving pulley 25 described above.

A pair of ram guide rails 3 are provided on both left and right sides (right and left sides in FIG. 1) of the driving ball screw 29.
5 is provided so as to extend in the vertical direction, and a ram 37 is provided movably up and down along the ram guide rail 35. Although not shown, the ram 37 is provided with a ball nut which is screwed to the ram ball screw 29 and moves up and down. A flat pressing surface 39 is provided on the lower surface of the ram 37.

Therefore, the driving motor 21 for pressing force is
When the ram 3 is rotated and the ram ball screw 29 is rotated, the ram 37 moves up and down along the ram guide rail 35 via a ball nut screwed into the ram ball screw 29.

A support 41 is provided between the base plate 5 of the base 3 and the ceiling frame 11 at an end (the left and right ends in FIG. 1) on the base plate 5. Are horizontally provided to form a bridge structure. A punch holder 47 in which a plurality of (here, for example, 3 × 4 rows of 12) punches P are arranged in a rectangular area is integrally provided in an opening 45 in a central portion of the intermediate frame 43. In addition, an index punch 49 is mounted on each of the left and right outer sides of the front row of the punch holder 47 (upper and lower left sides in FIG. 3).

Referring also to FIG. 1 and FIGS. 4 to 6, a table 51 is provided at the left and right ends (upper and lower ends in FIG. 4) of the upper surface of the intermediate frame 43. ) Are provided in the Y-axis direction, and a guide rail 53 is provided on the upper surface of each base 51 so as to extend in the Y-axis direction which is the front-rear direction.

On each of the guide rails 53, a pair of left and right frames 57L, 57R having a plurality of sliders 55 movable on the bottom surface as slide frames, for example, along the guide rails 53, and each of the left and right frames 57L. , 57
Front frame 5 connecting the front end of R (left end in FIG. 4)
7F and a striker support frame 59 in the form of a rectangular frame composed of a rear frame 57B connecting the rear ends (right ends in FIG. 4) of the left and right frames 57L and 57R. Accordingly, the striker support frame 59 is movable on the guide rail 53 in the front-rear direction (the left-right direction in FIG. 4), that is, the Y-axis direction.

A servo motor 61 is provided near the front end of the left frame 57L of the striker support frame 59, and a driving pulley 63 is mounted on the rotation shaft of the servo motor 61.
Is attached.

A rotary shaft 69 extending in the Y-axis direction is provided near the left and right ends of the striker support frame 59.
L and 69R are rotatably supported via bearings 65 and 67 as appropriate. A driven pulley 71 is mounted near the front end of the rotary shaft 69L at a position corresponding to the driving pulley 63 of the servo motor 61, and a driving belt 73 is wound around the driving pulley 63 and the driven pulley 71. .

Timing pulleys 75F, 75B, 77 are provided at the front end and the rear end of each of the rotary shafts 69L and 69R.
F and 77B are attached, and the front and rear timing belts 79F and 79B are wound respectively. Further, a pair of front and rear striker guide shafts 81F and 81B for connecting the front and rear ends of the left frame 57L and the front and rear ends of the right frame 57R are provided so as to extend in the X direction (the vertical direction in FIG. 4) which is the left and right direction. Have been.

Referring to FIGS. 4 and 6, the timing belts 79F, 79B are fixed to a part of the timing belts 79F, 79B via a connecting plate 83, and reciprocate left and right along the striker guide shafts 81F, 81B. Flexible front and rear striker sliders 85F and 85B are provided, and a pair of guide shafts 87 connecting the striker sliders 85F and 85B are provided in the front and rear direction (Y-axis direction).

Referring to FIG. 4, a first cylinder 89 for moving the striker is provided on the rear striker slider 85B.
Is provided at the tip of the piston rod 91 of the first cylinder 89.
An intermediate slider 93 that is movable along is provided.

Further, a second cylinder 95 for moving the striker is mounted on the left side of the intermediate slider 93. The striker holder 99 is provided at the end of the piston rod 97 of the second cylinder 95 with the guide shaft 87 described above.
Is provided so as to be movable along. At the center of the striker holder 99, a striker 101 that normally projects upward is provided so as to be able to descend.

With the above configuration, when the servo motor 61 drives the rotation shafts 69L, 69R to rotate via the drive belt 73, the timing belts 79F, 79B provided before and after the rotation shafts 69L, 69R.
Rotates synchronously, and the front and rear striker sliders 8
The striker holder 99 is moved and positioned in the X-axis direction which is the left-right direction via 5F and 85B.

The positioning of the striker holder 99 in the Y-axis direction is determined by the expansion and contraction of the first and second cylinders 89 and 95 described above. Although the first and second cylinders 89 and 95 are air cylinders that can be positioned only at two positions, ie, a telescopic position and an extended position, in the present embodiment shown in FIG. 4, the dies are arranged in three rows in the Y-axis direction. This configuration suffices because the selection of all the dies can be made at three positions. here,
If the contraction position of the cylinder is off, the extension position is on, and the right column in the Y-axis direction in FIG. 4 is defined as the first column, the center is defined as the second column, and the left column is defined as the third column, when positioning in the first column, Both the first and second cylinders 89 and 95 are off. When positioning in the second row, the first cylinder 89 is turned on, the second cylinder 95 is turned off, and when positioning in the third row, the first and second cylinders 89 and 95 are turned off.
The second cylinders 89 and 95 may be turned on.

As described above, in the present embodiment, the striker sliders 85F and 85B are positioned in the X-axis direction by the servomotor 61 and the drive belt 73, and
The positioning in the Y-axis direction is performed by the expansion and contraction of the second cylinders 89 and 95, and finally the positioning of the striker holder 99 on the XY table is completed, so that a desired punch can be selected quickly.

A punch P and a die D, which are upper and lower molds, are used.
The centering accuracy has a very significant effect on the machining accuracy, but the misalignment between the punch P and the striker 101 that presses the punch P has little effect on the machining accuracy. Therefore, in the present application, only the lightweight striker 101 having the above-described configuration can be positioned quickly in the XY table with respect to the selection of a mold that requires speed rather than accuracy.

The pressing surface 39 at the lower end of the ram 37 described above.
13, the moving range of the striker 101 or the punch P and the die D as shown in FIG. 1, FIG. 2 and FIG.
Is set to cover any one of the arrangement ranges of the die group, the striker 101 is positioned above the desired punch P, and the ram 37 is lowered, so that the striker 1
A desired punch P can be pressed through the “01”.

When the punch P of the punch holder 47 is to be exchanged or repaired, the entire striker support frame 59 is moved to the back side (to the right in FIG. 4) along the guide rail 53 to thereby prevent the punch holder 47 from being replaced. Since the upper part is released, replacement of the punch P and maintenance work around the punch holder 47 can be performed easily and easily. Further, as described above, by retracting only the striker 101 side where high-precision positioning is not required, stability of the punch holder 47 and the punch P is not lost.

Referring to FIGS. 1 to 3 again, a die holder 103 on which a plurality of dies D can be mounted is provided on the near side of the upper surface of the base plate 5 (the left side in FIG. 2). Referring to FIG. 7 and FIG. 8 together, index dies 105, 1
07 is rotatably mounted. A flat gear 109 is provided on the outer periphery of the lower part of the index dies 105 and 107, and the worm gear 1 meshing with the flat gear 109 is provided.
11 is provided on the die holder 103. Note that a handle 113 is attached to the front surface (the lower end surface in FIG. 7) of the die holder 103.

Referring to FIG. 9, the die holder 103
When set, the lower surface of the spring 1 is supported in point contact by an elevating free bearing 115 provided on the upper surface of the base plate 5 of the base 3.
17, the bearing 119 is urged upward. Therefore, when the operator pulls the die holder 103 forward, the substantial weight of the die holder 103 is reduced by the urging force of the spring 117. And the die exchange operation can be easily performed.

Referring again to FIG. 8, the die holder 103
A body-side abutment block 121 for positioning the die holder 103 in the front-rear direction (left-right direction in FIG. 8) is attached to the upper surface of the base plate 5 corresponding to a position near the lower left and right ends by bolts 123.

A die holder-side abutment block 125 is attached to the left and right lower end portions (lower left end portion in FIG. 8) on the front side of the die holder 103 by bolts 127 on both the left and right sides. The die holder 103 is positioned in the front-rear direction by abutting the side abutment blocks 121, respectively. The die holder side abutment block 125 slightly protrudes downward from the lower surface of the die holder 103, but is provided at a position where the die holder 103 does not interfere with the rollers 151 even when the die holder 103 is pulled out.

The rear end face of the base plate 5 (FIG. 8)
A stopper plate 129 is attached to the right end surface of the base plate 5 with bolts 131 so as to protrude upward from the upper surface of the base plate 5.
At the center of 9, a damper 133 is provided so as to be retractable. The damper 133 absorbs an impact when the die holder 103 is fed and comes into contact with the stopper plate 129, but is not involved in positioning.

Further, a die holder fixing block 135 is provided on the base 3 below the base plate 5 with a rotating shaft 13.
A die holder fixing cylinder 139 for turning the die holder fixing block 135 up and down is provided on the base 3. The cylinder 139 for fixing the die holder presses the die holder-side abutment block 125 of the die holder 103 against the main body-side abutment block 121 with a high pressure by a notch 141 provided at the upper end of the die holder fixing block 135 to improve the positioning accuracy. It is intended to improve.

Referring to FIG. 7, the die holder 10
A center positioning block 143 for performing positioning in the left-right direction of the die 3 is fixed to the front center of the die holder 103 so as to protrude forward. On the left and right sides of the block 143, a block 144 is also provided on the die holder 103 with a certain space. Blocks 143, 144
Both project slightly below the lower surface of the die holder 103. On the other hand, at a position corresponding to the base plate 5 side, a pair of center positioning rollers 145 are fixedly provided so as to sandwich the lower protruding portion of the center positioning block 143 of the die holder 103 at the top.

The pair of center positioning rollers 145
It is located slightly lower than the lower surface of the die holder 103, and moves to the lower side of the die holder 103 when the die holder 103 is pulled out. Also, blocks 143 and 1 on the die holder side
By inserting the roller 145 into the two spaces formed by 44, the die holder 103 is positioned in the left-right direction. Since the left and right side surfaces of the center positioning block 143 are tapered so that the front side is slightly narrowed, the roller 145 can easily enter.
Eventually, the two blocks 144, the center positioning block 143, and the roller 145 perform positioning by line contact. In addition, the roller 145 is not a cylindrical roller, but employs a roller that inflates the vicinity of the upper and lower centers of the side surfaces of the roller. It is good also as what suppresses. Thus, the die holder 1
In the fixed positioning of 03, a mechanism for determining the front-back direction is provided at the lower left and right ends and a mechanism for determining the left-right direction is provided at the center, and both mechanisms are provided in front of the die holder 103 on the drawer side. That is, the operator can perform front-rear, left-right positioning, and achieve accuracy during assembly, as well as extremely high maintainability indispensable for maintaining accuracy. Thus, maintenance can be sufficiently performed so that oil, dust, and the like do not adhere to the contact surface for positioning. In addition, the mechanism for determining the front-rear direction is located at two points, that is, the right end and the left end of the die holder.

Further, a pair of left and right hydraulic die holder clamping devices 147 are provided on the upper surface of the base plate 5 corresponding to the set position of the die holder 103, so that they can be firmly fixed so that a gap between the abutting surfaces does not occur. Since it can be made rigid with the base plate or the like, the accuracy during processing is improved.

Referring to FIG. 7 and FIG. 8, die holder support rails 149 are provided at the positions corresponding to the lower surfaces on the left and right sides of the die holder 103 on both the left and right sides of the recess 15 of the base plate 5 of the base 3 in the front-rear direction. This die holder support rail 1 is provided so as to extend in a certain Y-axis direction.
49 is provided with a plurality of die holder transport rollers 151 rotatably at appropriate intervals. A stopper 153 such as a roller is provided on the front side (lower side in FIG. 7) of the die holder support rail 149 to prevent the die holder 103 from dropping forward when the die holder 103 is pulled out substantially horizontally.
55 attached.

With the above configuration, when the die holder 103 is pulled out for replacement or maintenance of the die D, the left and right die holder clamping devices 147 are unclamped, and the die holder fixing block 135 is moved by the die holder fixing cylinder 139. The die holder-side abutment block 125 fixed between the die holder fixing block 135 and the main body-side abutment block 121 is released by being turned to the front. Then, the worker holds the die holder 1
The handle 113 of FIG. 03 is pulled forward, and the die holder 103 is pulled out to the position shown by the two-dot chain line in FIG.

Since the stopper 153 is provided in front of the roller 151 for transporting the die holder, it is possible to prevent the roller 151 from dropping out due to excessive drawing.

When the die holder 103 is pulled out, a recess 15 is formed in the front center of the base plate 5.
(Refer to FIG. 7), which makes it easier for the worker to work. Therefore, the user inserts his / her hand from the lower surface of the die holder 103 pulled out and pushes the mounted die D upward, while pressing the die D from above. Will be pulled out.

On the other hand, the die D is mounted and the die holder 103 is mounted.
Is set, the die holder 103 is placed straight on the die holder transport roller 151, and the operator pushes the handle with the handle 113, and the center positioning block 143 and the block 144 of the die holder 103 sandwich the center positioning roller 145 of the base plate 5. The positioning in the left-right direction is performed by the shape, and the positioning in the front-rear direction is performed by abutting the die holder side abutment block 125 against the main body side abutment block 121.

At this time, since the front end face of the die holder 103 hits the damper 133 to absorb the impact, the die holder side abutment block 125 and the main body side abutment block 121 are absorbed.
Can be prevented from violently colliding.

The die holder fixing cylinder 139
By rotating the die holder fixing block 135 upward, the die holder-side abutment block 125 is pressed against the main body-side abutment block 121 with a force of several hundred kg to several tons to be fixed, and the die holder clamp device 147 controls the right and left sides of the die holder 103. And fix it.

On the other hand, referring again to FIGS. 1 and 3,
The left and right index dies 105 and 107 and the index punch 4
The left and right index drive motors 157 are provided to index the rotation of the drive pulley 9, and the drive shaft is
59 are attached.

Below the index drive motor 157, a drive shaft for the index punch whose end on the center side (the center side of the main body in FIG. 1) is connected to a worm gear (not shown) for rotating the index punch 49. 16
1 are provided in the horizontal direction, and bearings 163 and 165 are provided.
It is rotatably supported by.

A driven pulley 167 is attached to the outer end of the drive shaft 161 for the index punch.
The first belt 169 is wound around the driving pulley 159 and the driven pulley 167 described above. Further, the driven pulley 1
A transmission drive pulley 171 is attached adjacent to the inside of the 67.

Below the index punch drive shaft 161, a main body side index die drive shaft 173 for rotating the worm gear 111 for indexing the index dies 105 and 107 is provided horizontally, and a bearing 175, 179 are rotatably supported.

This main body side index die drive shaft 17
3 rotates via a drive motor 157, a transmission drive pulley 171, a driven pulley 179, and a second belt 181. Referring to FIG. 10, for example, a connection protrusion 183 is provided as a main body side connection portion at the center end (the left end in FIG. 10) of the main body side index die drive shaft 173.

On the other hand, with reference to FIGS. 7, 8 and 11, a worm gear 111 for indexing the index dies 105 and 107 is provided with a central end of a drive shaft 185 for a die holder side index die. ing. Referring to FIG. 10, the drive shaft 185 for the die holder side index die (the right end in FIG. 10) is provided with the drive shaft 17 for the main body side index die.
A connection recess 187 that fits into the connection protrusion 183 provided on the third connector 3 is attached.

Referring to FIG. 11, sensor brackets 189 are attached to the left and right ends of the front end face of the die holder 103 by bolts 191 and project outward (to the right in FIG. 11). A detection pin 193 is urged by a spring 195 to the rear side (upward in FIG. 11) and protrudes from the sensor bracket 189. The detection pin 193 and the lock pin 197 move integrally back and forth with respect to the bracket 189 via a connection plate 198.

With the above configuration, when the die holder 103 is mounted, the connection projection 183 is fitted into the connection recess 187, and the rotational force of the main body side index die drive shaft 173 is reduced by the die holder side index die drive shaft 185.
And the worm gear 111 is rotatable. That is, when the die holder 103 is mounted,
As shown in FIG. 7, the detection pin 193 contacts the member on the main body side and is pushed forward (downward in FIG. 7). 187 away.

The left and right die holder clamping devices 147 are unclamped, and the die holder fixing cylinder 13 is fixed.
When the die holder 103 is pulled out in a state where the die holder fixing block 135 is released by the step 9, the contact surface between the connection convex portion 183 and the connection concave portion 187 becomes horizontal,
The drive shaft 185 for the die holder side index die can be separated from the drive shaft 173 for the main body side index die.

At the same time as the die holder 103 is cut off, the detection pin 193 is released and pushed out to the main body side (upward in FIG. 11) by the force of the spring 195, and the lock pin 197 integrated therewith is also pushed out to the main body side, and the connection recess is formed. The lock pin 197 fits into the horizontal concave portion 187 to fix the connection concave portion 187 at the horizontal rotational position (reference position). Then, when the die holder 103 is set again, the contact surface between the connection concave portion 187 and the connection convex portion 183 remains horizontal, so that the connection between the connection concave portion 187 and the connection convex portion 183 is completed only by mounting the die holder 103. The lock pin 197 is also separated from the connection recess 187 in the same manner, and the index can be driven.

FIG. 12 shows an air catch sensor 199 for checking whether the die holder 103 is set and fixed securely. The air catch sensor 199 is provided on the base plate 5, blows air from an air supply port 201,
Always blow air from

When the die holder 103 is properly set, the distance d between the detection bracket 204 attached to the die holder 103 and the outlet 203 is set to, for example, about several microns. If a predetermined pressure, for example, a pressure of about 500 kgf, is detected at this interval, the pressure decreases when the interval is large, and increases when the interval is small.
Whether or not the die holder 103 is properly set can be easily confirmed.

Referring again to FIGS. 2, 3 and 14, a pair of X-axis guide rails 205 are provided on the upper surface of the base 3 on the rear side (right side in FIG. 2) of the base plate 5 in the X-axis direction. (In the vertical direction in FIG. 3), an X-axis carriage 209 is provided movably in the X-axis direction via a plurality of X-axis sliders 207 movable along each X-axis guide rail 205. Have been.

An X-axis ball screw 211 is rotatably provided between the pair of X-axis guide rails 205 so as to extend in the X-axis direction.
Is connected to the X-axis motor 215 via a joint 213 (see FIG. 3). An X-axis ball nut 217 screwed to the X-axis ball screw 211 is attached to the X-axis carriage 209.

A pair of Y-axis guide rails 219 are provided on the upper surface of the X-axis carriage 209 in the Y-axis direction (left-right direction in FIG. 3).
A Y-axis carriage 223 is provided movably in the Y-axis direction via a Y-axis slider 221 that is movable along.

A Y-axis ball screw 225 is provided between the pair of Y-axis guide rails 219 so as to extend in the Y-axis direction and to be rotatable. One end of the Y-axis ball screw 225 (FIG.
Is connected to a Y-axis motor 229 via a belt 227 (see FIG. 3). Note that a Y-axis ball nut 231 screwed to the Y-axis ball screw 225 is attached to the Y-axis carriage 223.

The right and left ends (upper and lower ends in FIG. 3) of the upper surface of the Y-axis carriage 223 are clamp arms 2 of the clamp device 232 which extend in the front-rear direction.
33 are provided so as to clamp the left and right ends of the work W over the entire width. Therefore, the work W which is particularly thin and has low rigidity is securely clamped so as not to bend during processing.

With the above configuration, the left and right ends of the work W are clamped over the entire length by the clamp arm 233, and the X-axis carriage 209 is moved and positioned in the X-axis direction by rotating the X-axis ball screw 211 by the X-axis motor 215. By rotating the Y-axis ball screw 225 by the Y-axis motor 229, the Y-axis carriage 223 can be moved and positioned in the Y-axis direction, and the workpiece W can be positioned at a desired position.

Further, the structure of the clamp arm 233 will be described.
In other words, the height of the clamp arm 233 is
It is desirable to be as low as possible due to clearance restrictions.
If the height of the clamp arm 233 is lowered, the clamp
Since the rigidity of the arm 233 naturally decreases,
The width of the clamp arm 233 must be increased.
The point arises. Therefore, in the embodiment shown in FIG.
Is especially the base width Aω ₂Is the height of the clamp arm 233
The value is larger than Ah. Furthermore, the base of the tip
Part width aω₁Is also preferably larger than Ah.

As a result, a structure is provided in which the height of the clamp arm 233 is held down so as to compensate for the rigidity lost there. Due to this shape, the workpiece W clamped particularly against horizontal stress generated at the time of positioning.
Can be held stably, and the gap between the punch P and the die D can be reduced. Further, the clamping device 23
Since 2 is disposed at the rear, the workability in the front, in which the die holder 103 is pulled out, is not impaired.

From the above results, when the mold is rotationally indexed by the worm gear 111 of the mold rotation supporting device provided on the die holder 103 detachably mounted on the frame 5, the clutch device is used for the main body side index die. The drive shaft 173 is connected to the die holder side index drive shaft 185. That is, the drive shaft 173 and the drive shaft 1
The drive shaft 173 and the drive shaft 1 are formed by engaging a connection protrusion 183 provided at the end of the other shaft with a connection recess 187 provided as a groove at the end of one shaft of the drive shaft 85.
85 can be connected. Also, the die holder 103
When pulling out the mold from the frame 5, the drive shaft 173 and the drive shaft 185 are cut off by pulling out the mold holder with the direction of the connection concave portion 187 and the connection convex portion 183 aligned with the pull-out direction of the die holder 103 as the reference position. Since the clutch device is separated, the clutch device can be connected / disengaged without providing a conventional drive device such as an actuator. Thereby, connection or release of the clutch device can be performed in a short time.

When the die holder 103 is pulled out from the frame 5, the driven shaft lock device is fixed at the reference position so that the drive shaft 185 separated from the drive shaft 173 does not rotate. Therefore, the die holder 103 is set next. At this time, the drive shaft 185 can be easily connected to the drive shaft 173.

It should be noted that the present invention is not limited to the above-described embodiment of the present invention, but by making appropriate changes.
It can be implemented in other aspects.

[0071]

As described above, in the punch press according to the first aspect of the present invention, when the die is rotationally indexed by the die rotation supporting device provided on the die holder detachable from the frame of the punch press. , The drive shaft and the driven shaft are connected by a clutch device. That is, the drive shaft and the driven shaft are connected by engaging the convex portion provided at the end of the other shaft with the concave groove provided at the end of one of the drive shaft and the driven shaft. Can be. Also, when pulling out the die holder from the frame of the punch press, by pulling out the mold holder by matching the direction of the concave groove and the convex portion with the pullout direction of the die holder which is the reference position.
Since the drive shaft and the driven shaft are separated from each other, the clutch device can be connected and disconnected without providing a conventional drive device such as an actuator. Thereby, connection or release of the clutch device can be performed in a short time.

In the punch press according to the second aspect of the present invention,
When pulling out the die holder from the frame of the punch press, the driven shaft lock device fixes it at the reference position so that the driven shaft separated from the drive shaft does not rotate. Can be connected to the drive shaft.

[Brief description of the drawings]

FIG. 1 is an overall front view of a punch press.

FIG. 2 is a side view as viewed from a direction II in FIG.

FIG. 3 is a sectional view taken along a line III-III in FIG.

FIG. 4 is a plan view showing a striker frame.

FIG. 5 is a side view as viewed from a direction V in FIG. 4;

FIG. 6 is a front view as viewed from a direction VI in FIG. 4;

FIG. 7 is a plan view showing a die holder.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a cross-sectional view showing a free bearing that supports a die holder.

FIG. 10 is a diagram illustrating a connection portion between a main shaft side index die driving shaft and a die holder side index die driving shaft.

FIG. 11 is an enlarged view of a portion XI in FIG. 7;

FIG. 12 is an enlarged view of an air catch sensor.

FIG. 13 is an overall schematic perspective view of a punch press.

FIG. 14 is a plan view of a workpiece movement positioning device.

[Explanation of symbols]

Reference Signs List 1 punch press 5 base plate (frame) 103 die holder (die holder) 111 worm gear (die rotation support device) 157 index drive motor (control motor) 173 body-side index die drive shaft (drive shaft) 183 connection projection ( Convex part) 185 Die holder side index die drive shaft (following shaft) 187 Connection concave part (concave groove) 197 Lock pin

Claims (2)

[Claims] 1. A punch having a punch holder for holding a plurality of punches and a die holder for holding a die corresponding to the punch, wherein one of the punch holder or the die holder is fixed to a frame and the other is slidably provided in a horizontal direction. In the press, a mold rotation support device is provided on the slidable mold holder so that the mold can be rotationally indexed, and a control motor for rotating and driving the mold rotation support device is provided outside the mold holder, A clutch device capable of transmitting / disconnecting the control motor to / from the mold rotation supporting device is provided, and the clutch device is provided with a groove on one of a drive shaft and a driven shaft, and the other is detachable with the groove on the other. When the mold holder is attached to and detached from the frame, a rotational position at which the engagement contact surfaces of the concave groove and the convex groove are substantially horizontal is set as a reference position. A punch press characterized by the following. 2. When the die holder is attached to / detached from the frame, the driven shaft is fixed in conjunction with the attachment / detachment.
The punch press according to claim 1, further comprising a driven shaft locking device for releasing.