JP2002143941A - Punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save energy consumption in a ram mechanism and to improve accuracy and positioning speed. SOLUTION: When performing punching work, by making a striker 101 freely position on the XY-plane above a punch holder to select a die from a plurality of punches P which are arranged in a fixed rectangular region and striking the punch P through the striker 101 by simply vertically moving a ram 37, thus the punching work is performed. Moreover, when performing the changing work and maintenance of the punch P, for example, because these works are performed after a slide frame 59 for freely movably supporting the striker 101 is moved to a retreating position, the maintenance is facilitated without affecting on the centering of the die or the like. Furthermore, the striker 101 is movable above a plurality of punches P and the striking face 39 of the ram 37 can cover the moving range of the striker 101, so the punch P can be struck through the striker 101 only by vertically moving the ram.

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 performing a punching process by selecting a desired die from a plurality of dies arranged on the X and Y planes.

[0002]

2. Description of the Related Art As a conventional punch press for selecting a mold, there are known a type I in which a striker moves at a fixed position on a turret or the like and a type II in which a striker moves and the mold side is fixed. .

The type I prior art is an example of a turret punch press in which a mold is placed on a rotating turret, but linearly moves two molds known in Japanese Utility Model Publication No. 7-47140. This is a method of selectively pressing with a single striker. That is, the mold is finally selected by combining the rotation positioning of the turret and the linear movement of the striker.

[0004] The type II prior art is based on the stability of the mold position and the size of the processing machine (high productivity per equipment area).
It can be said that this type is more advantageous in high precision machining. As an example of this type II, referring to FIG. 13, in the striker mechanism 301, a plurality of dies (punches) P set in a punch holder 303
A striker 305 for individually pressing the head of each punch P
Are provided, and a ram 309 is provided above the striker holder 307 so as to be able to reciprocate back and forth (in the X-axis direction and the Y-axis direction).

When the punch P is pressed, the ram 309 itself moves in the X-axis direction and the Y-axis direction to select a desired punch P, and the striker 30 on the punch P
After being positioned above the position 5, it is lowered in the vertical direction (Z-axis direction), and the striker 305 is pressed to perform punching.

[0006]

However, the prior art of the type I is based on the premise that the mold is indexed by a rotary turret, and is difficult when a mold hole for mounting the mold is machined into the turret. Precision matters. Although this was not a problem in the general world of sheet metal processing performed with conventional turret punch presses, it has the same level of precision as that achieved extremely high precision by integrally molding thin plates with a press machine, such as in the electronic component industry. If the product processing is performed by a punch press, the distance between the center of rotation of the turret and the center of each mold hole must be the same at a high level. It will be a very difficult task and will be expensive if it can be done. In other words, it can be said that positioning involving a rotating member such as a turret is not suitable for high precision machining. Furthermore, the positioning stop accuracy and the positioning speed of a heavy rotating turret on which a mold is arranged are limited. 7-4714
In Japanese Patent Publication No. 0, it is necessary to perform rotational positioning of two systems, that is, a turret and a rotating cylinder that rotates in the turret in order to increase the yield, and it becomes more difficult to obtain accuracy.

Further, in the conventional type II technology shown in FIG. 13, the ram 309 presses the punch P, withstands a high load, has a vertical drive mechanism, and If it is moved in the axial direction and the Y-axis direction, there is a problem that a guide device and a driving mechanism required for the movement are complicated, the capacity is large, the cost is high, and the energy consumption is increased.

SUMMARY OF THE INVENTION An object of the present invention is to pay attention to the above-mentioned problems of the conventional technology, and it is possible to reduce the energy consumption of a ram mechanism and to improve the accuracy and positioning speed of a punch. To provide a press.

[0009]

According to a first aspect of the present invention, there is provided a punch press according to the first aspect of the present invention, wherein a die group is arranged in a rectangular area in an X-axis direction and a Y-axis direction on an X-Y plane. In a punch press for performing a punching process by selecting a desired mold from the above, a striker capable of pressing the mold group is provided at a position above each of the molds so as to be freely positioned in an XY plane, and A ram capable of vertically pressing the striker is provided above the striker so as to be vertically movable.

Therefore, when performing the punching process, only the lightweight striker is moved above the desired mold from the mold group mounted on the fixed holder to select the mold, and simply moves up and down. The punch is pressed by the ram through the striker to perform punching. Thus, the energy saving of the ram mechanism has been achieved, the structure of the rotary turret has been eliminated, and the punch holder and die holder during processing have been fixed to improve the centering accuracy, but the speed of mold selection has been improved. Is achieved.

According to a second aspect of the present invention, there is provided a punch press according to the first aspect, wherein the striker is supported by a slide frame movable to a position retracted from a mold arrangement position. Is what you do.

[0012] In order to perform replacement work and maintenance of the punch of the fixed punch holder, it is necessary to open the upper surface of the holder. Therefore, the space on the upper surface of the punch holder is secured by covering the upper surface of the punch holder and moving the slide frame, which movably supports the striker, to the rear evacuation position.
Thereby, the work of replacing the punch and the maintenance of the punch holder are easily and easily performed.

According to a third aspect of the present invention, in the punch press according to the first aspect, the ram has a size such that the ram covers either a moving range of the striker or an arrangement range of the mold group. Having a pressure surface,
It is characterized by the following.

Therefore, the striker can be moved above the group of dies, but the pressing surface of the ram is large enough to cover either the moving range of the striker or the arrangement range of the group of dies. Regardless of the position of the striker on the XY plane, the ram can press any mold through the striker only by moving the ram up and down.

[0015]

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 support posts 7 are fixed to the front, rear, left and right ends of the thick base plate 5 provided on the upper surface of the base 3 with the bolts 9, and Top plate 11 is bolt 1
3 fixed. 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 top surface of the top plate 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 top plate 11. A driving motor 21 for pressing is provided on the reinforcing rib 17 on the rear side (right side in FIG. 2) of the top plate 11.
Are provided with the rotating shaft 23 facing upward, and the rotating shaft 2
A drive pulley 25 is attached to 3.

A driving ball screw 29 rotatably supported by a strong bearing 27 against vertical external force is provided in the opening 19 of the top plate 11 so as to extend 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.

Between the base plate 5 and the top plate 11 of the base 3, a support base 41 is provided 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. It should be noted that index punches 49 are respectively provided on the left and right outer sides of the front row of the punch holder 47 (upper and lower left sides in FIG. 3).
Is installed.

Referring to FIG. 1 and FIGS. 4 to 6, both sides of the upper surface of the intermediate frame 43 (upper and lower ends in FIG. 4) are provided with a table 51 in the front-rear direction (in the left-right direction in FIG. 4). ) 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 frame 59 in the form of a rectangular frame consisting of a rear frame 57B connecting the rear ends (right ends in FIG. 4) of the left and right frames 57L and 57R. Therefore,
The striker 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.

Left frame 57 of striker frame 59
A servo motor 61 is provided near the front end of L.
A drive pulley 63 is attached to a rotation shaft of the servo motor 61.

In the vicinity of both left and right ends of the striker frame 59, rotating shafts 69L, 6 extending in the Y-axis direction are provided.
9R is 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 drive pulley 63 of the servo motor 61 described above.
A drive belt 73 is wound around 3 and the driven pulley 71.

Timing pulleys 75F, 75B, 77 are provided at the front end and the rear end of each of the rotating 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 and 79B are fixed to a part of the timing belts 79F and 79B via a connecting plate 83, and reciprocate right and left along the striker guide shafts 81F and 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 tip 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.

When the servo motor 61 drives the rotary shafts 69L and 69R to rotate via the drive belt 73, the timing belts 79F and 79B provided before and after the rotary shafts 69L and 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 this embodiment, the striker sliders 85F and 85B are positioned in the X-axis direction by the servo motor 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.
Is the moving range of the striker 101 or the punch P,
Since the size of the die D is set to cover 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. Can be pressed.

When replacing or repairing the punch P of the punch holder 47, the entire striker frame 59 is moved to the back side (right side in FIG. 4) along the guide rail 53, so that the upper part of the punch holder 47 is moved. Is released, the work of replacing the punch P and performing 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 again to FIGS. 1 to 3, a die holder 103 on which a plurality of dies D can be mounted is provided on the front 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
In the set state, the lower surface is supported by an up-and-down type free bearing 115 provided on the upper surface of the base plate 5 of the base 3, and furthermore, the bearing 117 is urged upward by a spring 117, so that the lower surface of the Can be pulled out by force.

Referring again to FIG. 8, the die holder 103
The body-side abutment block 12 for positioning the die holder 103 in the front-rear direction (left-right direction in FIG. 8) is provided on the upper surface of the base plate 5 corresponding to the left and right side surface positions of
1 is attached by a bolt 123.

A die holder-side abutment block 125 is attached by bolts 127 to the lower front end (the lower left end in FIG. 8) of the left and right side surfaces of the die holder 103, and abuts against the main body-side abutment block 121. This positions the die holder 103 in the front-rear direction.

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.

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 fixes the die holder side abutment block 125 of the die holder 103 against the main body side abutment block 121 by the notch 141 provided at the upper end of the die holder fixing block 135 and fixes the die holder 103 in the front-rear direction. I have.

Further, referring to FIG.
A center positioning block 143 for positioning the die holder 103 in the left-right direction is provided at the center front end of the base plate 5 of the base 3, and for positioning the die holder 103 in the left-right direction across the center positioning block 143. For example, a pair of center positioning rollers 145 made of an elastic member such as rubber are provided at the lower front end of the die holder 103.

The interval between the outer peripheral surfaces of the pair of center positioning rollers 145 is set slightly smaller than the width of the center positioning block 143 of the base plate 5. When the die holder 103 is set, both center positioning rollers 145 are set. Thereby, the center positioning block 143 is securely sandwiched. Further, a pair of left and right hydraulic die holder clamp devices 147 is provided on the upper surface of the base plate 5 corresponding to the set position of the die holder 103.

Referring to FIG. 7 and FIG. 8, die holder support rails 149 extend in the front-rear direction at both left and right outer sides of the recess 15 of the base plate 5 of the base 3 at positions corresponding to the left and right side surfaces of the die holder 103. The die holder support rail 149 is provided so as to extend in the Y-axis direction.
Are provided with a plurality of die holder conveying rollers 151 rotatably at appropriate intervals. Further, a stopper 153 such as a roller is attached to the front side (lower side in FIG. 7) of the die holder support rail 149 by a bolt 155 so as not to drop forward when the die holder 103 is pulled out.

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 conveying the die holder, it is possible to prevent the roller 151 from being pulled out too much and dropped forward.

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, the operator pushes the handle with the handle 113, the center positioning roller 145 of the die holder 103 sandwiches the center positioning block 143 of the base plate 5, and the horizontal direction is set. In addition, the die holder-side abutment block 125 is abutted against the main body-side abutment block 121 to perform positioning in the front-rear direction.

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 to be fixed, and the die holder clamp device 147 clamps and fixes the left and right sides of the die holder 103.

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
Left and right index drive motors 157 are provided for indexing the rotation of the drive pulley 9, and a drive pulley 1
59 are attached.

Below the index driving motor 157, a driving 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 driving shaft 161, a main body side index die driving shaft 173 for rotating the worm gear 111 for indexing the index dies 105 and 107 is provided horizontally, and a bearing 175, It is rotatably supported by 177.

This main body side index die drive shaft 17
3 near the outer end of the transmission drive pulley 17 described above.
A driven pulley 179 is attached to a position below the first pulley 1, and a second belt 181 is wound around the transmission driving pulley 171 and the driven pulley 179. 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, referring to FIG. 7 and FIG. 11, the worm gear 111 for indexing the index dies 105 and 107 is provided with the center end of the drive shaft 185 for the die holder side index die.
Further, referring to FIG. 10, a connection protrusion provided on the main body side index die drive shaft 173 is provided at an outer end (right end in FIG. 10) of the die holder side index die drive shaft 185. A connection recess 187 that fits into the portion 183 is attached.

Referring to FIG. 11, sensor brackets 189 are attached to the left and right ends of the front end surface of the die holder 103 by bolts 191 and project outward (to the right in FIG. 11). At the outermost end of the sensor bracket 189, a detection pin 193 is urged by a spring 195 to the rear side (upward in FIG. 11) and protrudes. The inside of the detection pin 193 (FIG. 11)
, A lock pin 197 is provided so as to be movable in the front-rear direction, and is moved back and forth integrally with the detection pin 193 by the connection plate 198.

With the above configuration, when the connection projection 183 is fitted into the connection recess 187, the rotational force of the main body side index die drive shaft 173 is transmitted to the die holder side index die drive shaft 185, and the worm gear 111 rotates. Is done. When the die holder 103 is set in the main body in this manner, as shown in FIG.
Since the 93 abuts against the bearing 177 of the drive shaft 173 for the main body side index die and is pushed forward (downward in FIG. 7), the lock pin 197 also integrally moves forward to drive the drive shaft for the die holder side index die. 185 away.

On the other hand, as shown in FIG. 10, when the connection projection 183 is horizontal, the left and right die holder clamping devices 147 are unclamped, and the die holder fixing block 13 is moved by the die holder fixing cylinder 139.
5 and release the die holder 103 forward,
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.

As described above, when the die holder 103 is detached, as shown in FIG.
Since the spring 93 is pushed out toward the main body (upward in FIG. 11) by the spring 195, the lock pin 197 is also integrally pushed out toward the main body, and the lock pin 197 is fitted into the connection recess 187 of the drive shaft 185 for the index die side index die. Drive shaft 185 for the index die on the die holder side
And fix it so that the index dies 105 and 107 do not rotate.

Thus, when the die holder 103 is taken out for replacement or maintenance of the die D, the drive shaft 173 for the main body side index die and the drive shaft 185 for the die holder side index die can be separated.

Further, since the connection concave portion 187 of the drive shaft 185 for the index die on the die holder side is held horizontally by the lock pin 197, the index dies 105 and 107 are held.
Can be held at the reference position, and when the die holder 103 is set, the drive shaft 17 for the main body side index die
3 and the drive shaft 185 for the die holder side index die.

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 0.01 to 0.4 mm. Have been. At this interval, a predetermined pressure, for example, a pressure of about 500 kgf is detected. However, if the interval is large, the pressure is small, and if the interval is small, the pressure is large. It can be easily confirmed whether or not it is.

Referring again to FIGS. 2 and 3, the base 3
A pair of X-axis guide rails 205 are provided on the upper surface of the rear part (the right part in FIG. 2) of the center of the base plate 5.
X extending in the axial direction (vertical direction in FIG. 3) and movable along each X-axis guide rail 205.
An X-axis carriage 209 having a pair of shaft sliders 207 on the lower surface is provided movably in the X-axis direction.

An X-axis ball screw 211 extends in the X-axis direction and is rotatably provided between the pair of X-axis guide rails 205. One end of the X-axis ball screw 211 (FIG. 3)
Is connected to an X-axis motor 215 via a joint 213. In addition, X axis carriage 2
An X-axis ball nut 217 that is screwed to the X-axis ball screw 211 and moves in the X-axis direction is attached to 09.

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).
Y-axis carriages 223 each having a pair of Y-axis sliders 221 movable on the lower surface thereof are provided movably in the Y-axis direction.

A Y-axis ball screw 225 extends in the Y-axis direction and is rotatably provided between the pair of Y-axis guide rails 219. One end of the Y-axis ball screw 225 (FIG.
(The right end in the figure) is connected to a Y-axis motor 229 via a belt 227. Note that the Y-axis carriage 223
Is mounted with a Y-axis ball nut 231 that is screwed into the above-described Y-axis ball screw 225 and moves in the Y-axis direction.

At both left and right ends (upper and lower ends in FIG. 3) of the upper surface of the Y-axis carriage 223, clamp arms 233 extending in the front-rear direction are provided. It is supposed to. Therefore, the work W which is particularly thin and has low rigidity is surely clamped so as not to shift during the processing.

With the above configuration, the right and left 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.

From the above results, it is possible to realize a mechanism for stably fixing the punch holder 47 and the die holder 103 and for selectively selecting a certain amount of mold in order to perform product processing requiring extremely high precision. . Since a moving mechanism for moving the ram 37 in the X-axis direction and the Y-axis direction and a mechanism for rotating the turret can be eliminated and the capacity of the driving source can be reduced, energy saving can be achieved. That is, only 91 lightweight strikers are used in XY without adversely affecting the centering of the punch P and the die D.
Since only positioning on a plane is required, positioning speed can be improved, miniaturization, space saving, and energy saving can be achieved.

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

[0072]

As described above, in the punch press according to the first aspect of the present invention, when performing a punching process, a light weight is set above a desired die from a die group mounted on a fixed holder in a rectangular area. By freely moving only the striker in the XY plane and selecting it, the ram is simply moved up and down to press the punch through the striker to perform punching. For this reason, only one striker is moved to the front, back, left and right without moving the ram to the XY plane or the mold, so that the mold selection can be made quickly without adversely affecting the centering of the punch or the die. It can be carried out. In addition, since the striker has a lightweight structure, it is possible to reduce the size, save energy, and save space, and also to reduce the size of the entire punch press.
Furthermore, high-cost, high-precision rotary turret discs do not require mold hole machining, which reduces costs and man-hours, and eliminates the need for a rotating system. Easy to carry.

In the punch press according to the second aspect of the present invention,
For example, when performing a replacement operation or maintenance of a punch in a mold, the striker for pressing the punch can be moved to a retracted position together with a slide frame that movably supports the striker. That is, only the striker that does not significantly affect the processing accuracy can be retracted, and only the upper surface of the punch holder can be released while the punch holder is fixed, so that workability such as punch replacement and maintenance can be easily performed without affecting the processing accuracy. And it can be done easily.

In the punch press according to the third aspect of the present invention,
The striker is movable above the plurality of punches, but the pressing surface of the ram is large enough to cover either the movement range of the striker or the arrangement range of the mold group. Regardless of the position of the striker in the XY plane, it is possible to reliably press an arbitrary punch through the striker only by moving the striker up and down. Further, because of this configuration, a configuration is possible in which only the lightweight striker needs to be positioned in the XY plane.

[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 shows a connection portion between a main-body-side index die driving shaft and a die holder-side index die driving shaft.

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

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

FIG. 13 is a schematic view showing a striker mechanism in a conventional punch press.

[Explanation of symbols]

 Reference Signs List 1 punch press 37 ram 39 pressing surface 59 striker frame (slide frame) 101 striker P punch (die)

Claims (3)

[Claims] 1. A punch press for selecting a desired mold from a group of molds arranged in a rectangular area in an X-axis direction and a Y-axis direction on an X, Y plane and performing punching processing. A striker capable of freely pressing is provided at a position above each of the molds so as to be freely positioned in an XY plane, and a ram capable of pressing the striker is provided above and below the striker so as to be vertically movable. A punch press characterized by: 2. The punch press according to claim 1, wherein the striker is supported by a slide frame movable to a position retracted from a mold disposition position. 3. The ram according to claim 1, wherein the ram has a pressing surface large enough to cover either a moving range of the striker or an arrangement range of the mold group.
The punch press described in 1.