JP2001162333A - Piercing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly pierce by using a small device. SOLUTION: A device is provided with a lower die 29 having a die 43 for piercing, an upper die 27 having a piercing punch 41 and a pressing means which applies pressing force to the punch 41 and pierces a material together with the die 43, a lower holding face 39 to support the material from below in piercing is arranged to the lower die 29, an upper holding face 37 to hold the material together with the lower holding face 39 at the descended position for the lower die 29 is arranged to the upper die 27, an energizing means 51, which elevatably supports the punch 41 to the upper die 27 and energizes the punch 41 to the ascended position for the upper die 27, is arranged. Further, the device is provided with a support means 53, which elevatably supports the upper die 27 for the lower die 29, and a lifter 59, which makes the upper/ lower holding faces 37, 39 apart by giving elevation force to the upper die 27 for the lower die 29 and descends the upper die 27 by releasing the elevation force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching apparatus for punching a material such as a flat plate.

[0002]

2. Description of the Related Art As a conventional punching device, for example, FIG.
There are the following. In this punching device, a punch 3 and a die 5 are supported on a frame 1. The punch 3
A stripper 7 is attached to the side, and a lifter spring 9 is provided between the stripper 7 and the frame 1. A punch head 1 is provided at the upper end of the stripper 7.
The urethane spring 13 is interposed between the urethane spring 13 and the first spring.

When the punch head 11 is pressed by a pressing device (not shown), the stripper 7 is pressed via the urethane spring 13. By this pressing,
The stripper 7 descends against the urging force of the lifter spring 9, and pinches the plate material W with the die 5. When the punch head 11 is further pressed by a pressing device,
The punch 3 is further lowered, and a hole is formed in the material W between the punch 3 and the die 5. When the pressing of the punch head 11 by the pressing device is released, the punch 3 is
Rises, the punch 3 is pulled out of the material W, and the return spring 9 raises the stripper 7 to separate from the material W. The punch 3 is further raised with respect to the stripper 7 by the urging force of the urethane spring 13.

Next, when the material W is moved to form a hole in another position of the material W and the punch head 11 is pressed again by the pressing device, the hole can be formed in the same manner.

[0005]

However, with the above structure, the stripper 7 must be attached to the frame 1 so as to move up and down, so that the stripper 7 protrudes up and down of the frame 1. The overall height must be high. In addition, if the area of the material W held by the stripper 7 is increased, the size of the apparatus must be increased accordingly, and the area of the material W held by the stripper 7 and the die 5 must be narrow. Further, a stripper 7 is required for each punch 3, and when a plurality of punches 3 and dies 5 are provided, a stripper 7 and a lifter spring 9 are required for each punch 3, so that the number of parts is significantly increased. is there.

SUMMARY OF THE INVENTION The first object of the present invention is to make it possible to reduce the overall height of the apparatus and to make it possible to increase the pressing area of the material while being small, and to provide a plurality of sets of punches and dies. A second problem is that the increase in the number of parts can be suppressed even in such a case.

[0007]

According to the first aspect of the present invention, there is provided a lower die having a punching die, an upper die having a punching punch, and a pressing force applied to the punch to give a material together with the die. Pressurizing means for performing hole processing, the lower die is provided with a lower clamping surface for supporting a material from below at the time of drilling, and the upper die, together with the lower clamping surface at a lowered position with respect to the lower die. An upper holding surface for holding the material is provided, and an urging means for supporting the punch so as to be able to move up and down on the upper mold and urging the punch to an ascending position with respect to the upper mold is provided. Providing a supporting means for supporting an ascending and descending guide, applying a lifting force to the upper die to the lower die to separate the upper and lower clamping surfaces, and releasing a lifter capable of releasing the lifting force and lowering the upper die. It is characterized by having been provided.

According to a second aspect of the present invention, there is provided the hole punching apparatus according to the first aspect, wherein a plurality of sets of the punches and the dies are provided for performing a plurality of types of holes in the material, and the upper die and the lower die are provided. Is movably supported for positioning any combination of the punch and the die at the hole processing position.

According to a third aspect of the present invention, in the hole punching apparatus according to the second aspect, the pressurizing means causes any one of a plurality of sets of punches and dies located above and below the material to perform a hole processing. And a selecting means for selecting

According to a fourth aspect of the present invention, there is provided the hole punching apparatus according to the third aspect, wherein the selecting means includes: a moving portion which moves on the upper side of the material in accordance with the drilling position; A plurality of pressure parts which are supported so as to be able to move up and down and which can be raised to release the pressure of the pressure means, and selectively restrict the rise of the pressure part to apply the pressure of the pressure means to the punch through the pressure part. It is characterized by comprising a regulating unit for communicating.

[0011]

According to the first aspect of the present invention, when the lifting force is released from the state in which the upper and lower clamping surfaces are separated from each other by applying a lifting force to the lower die by the lifter, the upper die is caused by its own weight or the like. It descends, and the material can be clamped by the upper clamping surface of the upper mold and the lower clamping surface of the lower mold. At this time, the lowering of the upper mold with respect to the lower mold can be guided by the support means. When the pressing force is applied to the punch, the punch descends with respect to the upper die against the urging force of the urging means, and the hole can be formed in the material together with the lower die. After the hole is formed, when the pressing force by the pressurizing means is removed, the punch can be lifted by the urging force of the urging means against the upper die and can be pulled out of the material, so that the punch can be positioned at a predetermined rising position with respect to the upper die. Become. Further, when the lifter applies a lifting force to the upper mold, the upper and lower clamping surfaces are separated from each other, the clamping of the material is released, and the material can be moved to perform the next hole processing.

When a hole is formed in a material by a punch and a die, the material is clamped by the upper and lower clamping surfaces of the upper mold and the lower mold, so that a stripper is not required, and the stripper projects above and below the upper mold. And the overall device can be lowered. Further, since the upper and lower clamping surfaces are provided on the upper mold and the lower mold, the area can be increased without increasing the size of the device, and the material can be held in a wide range.

According to the second aspect of the present invention, in addition to the effects of the first aspect, even when a plurality of sets of punches and dies are provided for performing a plurality of types of hole drilling on a material, the material is not disposed between the upper and lower dies. Since the sheet can be held between the holding surfaces, it is not necessary to provide a stripper for holding for each punch, and the number of parts can be greatly reduced.

According to the third aspect of the present invention, in addition to the effect of the second aspect of the present invention, a hole can be formed in any of a plurality of sets of punches and dies located above and below the material by the selecting means. The pressure means may be a single one, simplifying the structure.

According to a fourth aspect of the present invention, in addition to the effect of the third aspect of the present invention, a plurality of pressure portions are moved by the moving portion in accordance with the hole drilling position, and the raising of any one of the pressure portions is selectively performed by the regulating portion. When the pressure is restricted to the above range, the pressing force of the pressing means can be transmitted to the punch via the selected pressure portion, and a plurality of types of holes can be easily formed in the entire range of the material.

[0016]

FIG. 1 is a front view of a punching apparatus to which an embodiment of the present invention is applied. As shown in FIG.
This punching device includes a pressurizing device 15, a mold 17, and a striker 19. The pressurizing device 15 constitutes a pressurizing means, and generates a pressurizing force by hydraulic pressure such as hydraulic pressure or a mechanical press. The pressurizing device 15 includes a bolster 21 at a lower portion and a slide 23 at an upper portion. Pressure operation is possible. 26 is a balance cylinder. The mold 17 is provided in a pair and mounted on a base plate 22 of the bolster 21, and the striker 19 is mounted on a slide 23.

As a material W, for example, a long and flat steel plate material is supplied to the mold 17 as shown in FIG. 1, and the plunger 25 operates by the NC control to lower the slide 23. The hole can be formed in the material W by the mold 17. The material W moves in the X-axis direction (the left direction in FIG. 1) which is the longitudinal direction of the material,
At the same time, the striker 19 is appropriately positioned while moving within the material width in the Y-axis direction (the direction perpendicular to the paper surface of FIG. 1) in which the material width is short. A desired hole can be formed in the entire range.

FIG. 2 and FIG.
9 is an enlarged cross-sectional view showing the relationship with FIG. 9, FIG. 2 shows a state in which the mold is separated, and FIG. As shown in FIGS. 2 and 3, the mold 17 includes an upper mold 27 and a lower mold 29, respectively. The upper mold 27 is supported on the lower mold 29 so as to be capable of ascending and descending guide as described later, and the lower mold 29 is supported on the base plate 22 of the bolster 21.

That is, the guide rail 31 is provided on the bolster 21. The guide rail 31 is shown in FIG.
As shown in a partially cut-away enlarged side view of a main part viewed from the side in the X-axis direction, it is extended in the Y-axis direction. A guide 33 supported on the lower surface of the lower mold 29 is provided on the guide rail 31.
Is slidably mounted. The guide 33 is supported on the lower surface of the lower mold 29 via a disc spring 35. Therefore, the lower mold 29 can reciprocate in the Y-axis direction with respect to the material W along the guide rail 31.

As shown in FIG. 2 and FIG.
Between them, a stopper plate 36 is interposed between the lower die 29 and the base plate 22 of the bolster 21. Stopper plate 37 and base plate 2
2, a stopper clearance of about 0.6 mm is provided. The stopper clearance is filled by the pressing force at the time of drilling, and the pressing force is received by the base plate 22 of the bolster 21 from the lower mold 29 via the stopper plate 36. The disc spring 35 absorbs the stopper clearance with respect to the guide rail 31. That is, the lowering of the lower mold 29 by the stopper clearance is absorbed by the bending of the disc spring 35, so that an excessive load does not act on the guide rail 31 side.

The upper die 27 is provided with an upper holding surface 37, and the lower die 29 is provided with a lower holding surface 39. The range in which the upper and lower clamping surfaces 37 and 39 are provided substantially covers the entire range in which the punch 41 and the die 43 are provided as shown in FIGS. Has become a wide range.

The punch 41 is mounted on the upper die 27, and the die 43 is mounted on the lower die 29. Punches 41 and dies 43 are provided in a plurality of different types in order to perform a plurality of types of holes in the material W. Punch 4
1. The mounting structure of the die 43 is as shown in FIG.

FIG. 6A is an enlarged sectional view of a main part.
(B) is an exploded view of the punch side. As shown in FIG.
The punch 41 is inserted into a punch guide 45 attached to the upper mold 27 side, and is attached between a spring seat 47 fixed on the punch guide 45 and a punch head 49 fastened to the upper end of the punch 41 by a bolt 48. A plurality of disc springs 51 are provided as urging means. Therefore, the punch 41
When the pressurizing force is released, the disc spring 51 urges the upper die 27 to a raised position with respect to the upper die 27.
The die 43 is fixedly supported by the lower mold 29.

In addition to the front view of the mold shown in FIG. 7, FIGS.
As shown in FIG. 5, the upper die 27 is supported by the die guide 53 as a support means so that the upper die 27 can be vertically guided with respect to the lower die 29. The mold guides 53 are provided at four corners of the upper mold 27 and the lower mold 29, respectively. This mold guide 53
Has a guide post 55 and a guide bush 57.

The guide post 55 is mounted on the lower mold 29 side, and the guide bush 57 is mounted on the upper mold 2 side. This guide post 55 is a guide bush 57
Are fitted via a ball retainer (not shown). Therefore, the upper mold 27 is supported via the mold guide 53 so that the four corners thereof are guided up and down with respect to the lower mold 29.

A pair of lifters 59 is further provided between the upper mold 27 and the lower mold 29. Lifter 59
The upper and lower molds 27, 2 are provided as shown in FIGS. 1, 4, 5, and 7.
9 are arranged between the mold guides 53 at both ends in the longitudinal direction. The lifter 59 applies a lifting force to the upper mold to the lower mold 29 to separate the upper and lower holding surfaces 37 and 39 from each other.
The lifting force is released and the upper mold 27 is lowered. This lifter 59 is as shown in FIG. 7 and FIGS. FIG. 8 shows the lift position of the lifter, and FIG. 9 shows the lower position of the lifter 59.

As shown in FIGS. 7, 8, and 9, the lifter 59 includes an air cylinder device 61. The cylinder portion 63 of the air cylinder device 61 is fixed to the lower mold 29, and a block 67 is fixed to the upper end of the piston portion 65. The lower end of a rod 69 penetrating the block 67 is screwed to the piston portion 65. Rod 69 is upper mold 2
7, a rod head 73 is attached to the upper end of the upper die 27 by a screw structure or the like. A spring 75 is provided between the rod head 73 and the upper die 27. Therefore, the cylinder part 63
When the piston portion 65 rises due to the pressure, the lower surface of the upper die 27 is pressed via the block 67, and a lifting force is applied. The lifting force separates the upper and lower holding surfaces 37 and 39 of the upper mold 27 and the lower mold 29 from each other.

By switching the air in the cylinder section 63,
When the piston portion 65 is instantaneously lowered and the lifting force of the block 67 is released, a gap is formed between the block 67 and the upper mold 27 at the next moment, as shown in FIG.
The upper mold 27 descends so as to ride on the block 67 due to the weight of 7. At this time, the urging force of the spring 75 between the rod head 73 and the upper mold 27 also acts, and the upper mold 27 instantly descends to the set position by its own weight and the urging force.

The striker 19 is as shown in FIGS. 1, 2, 3 and 10. FIG. 10 shows striker 1
It is a top view of 9 parts.

The striker 19 constitutes a pressurizing means together with the pressurizing device 15, and a selecting means for making holes in any of a plurality of sets of punches and dies 41, 43 located above and below the material W. Function as As the selection means, a striker 19 includes a striker base 77 as a moving unit and a pressure pin 79 as a pressure unit.
And a pressure plate 81 as a regulating unit.

The striker base 77 is provided over a pair of dies 17 juxtaposed in the X-axis direction.
The guides 83 on both sides in the longitudinal direction are configured to be slid and guided by guide rails 85 attached to the slide 23 of the pressurizing device 15. Guide rail 85
Are provided along the Y-axis direction which is the width direction of the material W.

At the center of the striker base 77,
A nut portion 87 is provided, and is screwed to the feed screw 89. The feed screw 89 is rotatably supported on the lower surface of the slide 23 by a bearing 91, and has an end coupled to the motor 93. Therefore, by the forward / reverse rotation control of the motor 93,
When the feed screw 89 rotates forward and backward, the nut 87 moves back and forth along the feed screw 89, and the striker base 77 moves along the guide rail 85 via the guide 83 in the Y-axis direction. This movement corresponds to the hole processing position on the upper side within the width of the material W.

A total of four pressure pins 79 are provided for each of the molds 17 and a total of four
7 to be able to move up and down. Each pressure pin 7
Above the slide 9, there is a space 9 for escape between the slide 23.
5 is provided, and the pressure pin 79 can be raised into the space 95 in order to selectively release the pressing force.

Four pressure plates 81 are provided corresponding to the respective pressure pins 79, and are supported by the striker base 77 so as to be slidable in the Y-axis direction.
An air cylinder 97 is connected to each pressure plate 81, and one of the pressure plates 81 is positioned on the pressure pin 79 by a selective operation of the air cylinder 97 by NC control.

For example, in FIG. 10, the rightmost pressure plate 81 is located on the pressure pin 79. In this state, the pressurizing device 15 operates, the slide 23 descends, and the pressure pin 79 abuts on the punch head 49. Only the pressure pin 79, whose rise is restricted by the pressure plate 81, transmits the pressing force to the punch 41. The other pressure pins 79 escape into the space 95 and do not transmit the pressing force.

Next, the operation will be described based on FIG. 1 and the like with reference to the operation chart of FIG. In FIG. 11, operation numbers 1 to 8 are shown, and one cycle is completed by performing all the operations.

In FIG. 11, the operation state of each part is shown below the operation number, and holes 3 are drilled at operation numbers 3, 4, 5, and 6. The lower part of the operating state shows the state of the pressurizing device in one cycle of 360 ° in the operating state. The lower part of the press device position shows the positions of the mold and the striker at each press device position. Further, the lower part shows the position of the lifter. These operations are performed in the present embodiment.
Automatically performed by NC control. (Operation No. 1) The material W moves in the X-axis direction in order to form a hole at a predetermined position, and the die 17
1. The user has moved in the Y-axis direction to select a combination of the dice 43. In response, the striker 19 also moves in the Y-axis direction. At this time, the lifter 59 is at the raised position, and the pressurizing device 15 is stopped. (Operation No. 2) The material W is positioned at a specified position, and the mold 17 and the striker 19 are also positioned. Further, the lifter 59 is at the raised position. In the striker 19, any one of the pressure plates 81 is arranged on the pressure pin 79, so that a hole can be punched out. The pressurizing device 15 starts operating, and the slide 23 starts descending. (Operation No. 3) The lifter 59 descends, and the upper and lower molds 27,
The material W is clamped by the upper and lower clamping surfaces 37 and 39 of the pipe 29, and the apparatus is in a hole punching standby state. At the same time, the slide 23 of the pressurizing device 15 is further lowered. (Operation No. 4) When the slide 23 of the pressurizing device 15 is lowered, each pressure pin 79 hits the punch head 49. Only the pressure pin 79 whose rise is selectively restricted by the pressure plate 81 is a punch 4
1, and the other pressure pins 79 escape into the space 95 and do not transmit the pressing force. When the punch 41 receives the pressing force and further descends, the disc spring 31 bends and the punch 41 hits the material W at the same time. Subsequently, the entire mold 17 descends while bending the leaf spring 31, and the stopper plate 36 and the base plate 22 come into contact with each other, so that the stopper clearance becomes zero. (Operation No. 5) The pressurizing device 15 descends to the bottom dead center. At this time, since the stopper plate 36 and the base plate 22 are in contact with each other, the punch 41 descends along the punch guide 41 while deflecting the disc spring 51, and punches a hole in the material together with the die 43. (Operation No. 6) When the pressurizing device 15 starts to rise, first, the punch 41 rises with respect to the upper die 27 by the urging force of the disc spring 51, and the punch 41 comes off the material W. Subsequently, the mold 17 is raised toward the guide rail 31 by the urging force of the disc spring 35, and a stopper clearance is generated again between the stopper plate 36 and the base plate 22. (Operation No. 7) The lifter 59 is raised, and the block 67 gives a lifting force to the upper die 27, and the upper die 27 is raised to form a material transfer space S between the upper and lower holding surfaces 37, 39. At the same time, the pressurizing device 15 also continues to rise, and the material W, the mold 17,
The striker 19 starts moving to make a hole at the next position. (Operation No. 8) The pressurizing device 15 operates for one cycle, becomes the top dead center, and returns to the state of the operation number 1.

In this operation, the material W is placed in the upper and lower molds 2.
Since the holes are punched by directly holding the upper and lower holding surfaces 37 and 39 of 7, 29, it is necessary to secure an extra height corresponding to the height of the stripper without requiring a special stripper. In addition, the height of the mold 17 and the like can be significantly reduced. Also, a punch 41, a die 43
When a plurality of sets are provided, there is no need to provide a stripper for each set, and the number of parts can be greatly reduced.

The upper mold 27 and the lower mold 29 are connected by a mold guide 53 and are moved up and down by a lifter 59, so that they can be moved while maintaining the concentric accuracy. Therefore, there is no waiting time for adjusting the concentric accuracy on the top dead center side of the pressurizing device, and the processing speed is greatly reduced.

Further, a plurality of sets of punches 41 and dies 43 can be mounted on the upper die 27 and the lower die 29, and other types of holes can be punched at arbitrary positions in the material. Further, since the pressing force is transmitted by selecting one punch 41 by the selection function of the striker 19, the capacity of the pressurizing device 15 can be significantly reduced as compared with the case where a plurality of holes are simultaneously punched out. Can be reduced in size. Further, the upper mold 27 and the lower mold 29 can be moved by one drive shaft, and the number of shafts can be reduced as compared with the case where the upper mold 27 and the lower mold 29 are moved separately. Can be planned.

In the above embodiment, a plurality of sets of punches 41 and dies 43 are provided on the upper mold 27 and the lower mold 29, but a single set of punches 41 and dies 43 are provided. Can also.

Although the lifter 59 is constituted by an air cylinder, it may be constituted by a hydraulic cylinder such as a hydraulic cylinder. The air cylinder 97 of the striker 19 can also be constituted by a hydraulic cylinder such as a hydraulic pressure, or can be driven by a motor. Furthermore, striker base 7
It is also possible to adopt a configuration in which 7 is moved by a fluid cylinder.

FIG. 12 shows another embodiment of the present invention. (A) is a cross-sectional view of a main part viewed from a Y-axis direction centering on a mold 17, and (b) is a cross-sectional view of a main part viewed from an X-axis direction. (C) and (e) are cross-sectional views corresponding to (a), showing an operating state. (D) and (f) are cross-sectional views corresponding to (b), showing the operating state. The components corresponding to those in the above embodiment will be described with the same reference numerals.

In the present embodiment, a striker block 101 is selected on the punch head 49 of the punch 41 necessary for punching a hole in the material W instead of the striker 19 including the selecting means of the above embodiment. It is intended to be put on.

At the time of punching holes, FIGS. 12 (a) and 12 (b)
Punch 4 with striker block 101 on
The die 1 and the die 43 are moved to the lower side of the slide 23 of the pressurizing device 15, and a pressing force is applied to the striker block 101 by the slide 23 as shown in FIGS. A hole can be punched at a desired position of W.

Then, another punch 4 is formed at another place of the material W.
1. When punching is performed by the die 43, the striker block 101 placed on that position is
The mold 17 is moved along the guide rail 31 so as to be located below the third mold 3. In (e) and (f), the punch 41 and the die 43 closer to one side in the Y-axis direction
Is selected, and the mold 17 has moved to the other side along the guide rail 31. In (d) and (f), S indicates a material width.

As described above, also in this embodiment, it is possible to perform punching at an arbitrary position of the material W. Further, since the structure is such that the striker block 101 is selected and placed at an arbitrary position, the structure is extremely simple. Further, the slide 23 can be moved up and down at a fixed position, and the conventional pressurizing device can be used as it is.

FIG. 13 shows still another embodiment. (A) is a cross-sectional view of the main part viewed from the Y-axis direction around the mold, (b) is a cross-sectional view of the main part viewed from the X-axis direction, (c),
(E) is a cross-sectional view at the same position as (a) and shows the operation state, and (d) and (f) show the operation state in a cross-sectional view at the same position as (b). Note that components corresponding to those in the above embodiment will be described with the same reference numerals.

On the other hand, in the present embodiment, the mold 17 is fixedly provided without moving in the Y-axis direction. FIG. 12 shows that the striker block 101 is placed on the punch head 49 of the punch 41 corresponding to the desired punching position.
This is the same as the embodiment. In the present embodiment, the slide 103 of the pressurizing device 15 moves in the Y-axis direction so that the striker block 101 at the punching position is moved.
Located on top.

Therefore, the slide 103 and the slide 1
The cylinder device that applies a pressing force to the cylinder 03 is configured to be movable in the Y-axis direction with respect to a base frame by a guide rail or the like, and is configured to be moved by NC control or button operation.

When the slide 103 is positioned on the striker block 101 at the punching position as shown in FIGS.
As shown in (c) and (d), the pressing force is applied to the striker block 101, and the material W can be punched by the punch 41 and the die 43.

In order to perform punching at other positions,
From the states (a) and (b), the slide 103 and the cylinder device (not shown) are moved in the Y-axis direction and positioned on another striker block 101. For example, (e), (f)
In the figure, the striker block 101 is located on the striker block 101 on one side in the Y-axis direction and presses the striker block 101. In this way, a punching process can be performed at an arbitrary position of the material W.

In this embodiment, since the mold 17 is fixed in the Y-axis direction, the mold 17 can be reduced in size with respect to the material W, and the material W is formed into a hole having a large width S. Can be applied.

Although FIG. 12 and FIG. 13 show two striker blocks 101, for example, a single striker block 101 is used to select a striker block 101 on the punch head 49 according to the punching position. It can also be carried. Further, a plurality of striker blocks 101 can be further provided, and the striker blocks 101 can be placed on the punch heads 49 corresponding to the punching positions in advance, and the punching can be continuously performed.

[Brief description of the drawings]

FIG. 1 is an overall front view of a punching device to which an embodiment of the present invention is applied.

FIG. 2 is an enlarged sectional view of a main part of a mold and a striker according to one embodiment.

FIG. 3 is an enlarged sectional view of a main part of a mold and a striker according to one embodiment.

FIG. 4 is an enlarged cross-sectional view of a mold according to one embodiment as viewed from an X-axis direction.

FIG. 5 is an enlarged plan view of a mold according to one embodiment.

FIGS. 6A and 6B are enlarged cross-sectional views of a main part of a state where a punch and a die are mounted, and FIG. 6B is an exploded view of the punch side;

FIG. 7 is a main part front view showing an upper die and a lower die supporting structure according to the embodiment;

FIG. 8 is an enlarged front view of a partially cut-away main part showing support structures of an upper die and a lower die according to one embodiment.

FIG. 9 is an enlarged front view of a partially cut-away main part for explaining lifting and lowering of an upper die and a lower die according to one embodiment.

FIG. 10 is a plan view of a striker according to one embodiment.

FIG. 11 is a chart showing an operation according to the embodiment.

12A and 12B are cross-sectional views of main parts viewed from the Y-axis direction centering on a mold, and FIG. 12B is a cross-sectional view of main parts viewed from the X-axis direction according to another embodiment of the present invention. , (C) and (e) are (a)
And (d) and (f) correspond to (b) and are cross-sectional views of the principal parts showing the respective operations.

FIG. 13 relates to yet another embodiment of the present invention, and (a)
Is a cross-sectional view of the main part viewed from the Y-axis direction centering on the mold, (b) is a cross-sectional view of the main part viewed from the X-axis direction, (c) and (e) correspond to (a), and (d) (F) is a sectional view of a main part showing an operation state corresponding to (b).

FIG. 14 is a partially cutaway side view according to a conventional example.

[Explanation of symbols]

 Reference Signs List 15 pressurizing device (pressurizing means) 17 mold 19 striker (selecting means) 27 upper mold 29 lower mold 37 upper clamping surface 39 lower clamping surface 41 punch 43 die 53 mold guide (supporting means) 59 lifter 51 disc spring ( Urging means) 77 striker base (moving part) 79 pressure pin (pressure part) 81 pressure plate (regulating part)

Claims (4)

[Claims] 1. A lower die having a die for punching, an upper die having a punch for punching, and a pressurizing means for applying a pressing force to the punch to perform a hole drilling process on the material together with the die. The lower mold is provided with a lower holding surface for supporting a material from below during the hole processing, and the upper mold is provided with an upper holding surface for holding the material together with the lower holding surface at a lowered position with respect to the lower mold. A biasing means for supporting the punch in the upper mold so as to be able to move up and down and urging the punch to an ascending position with respect to the upper mold is provided. A punching device, characterized in that a lifting force is applied to the lower die so as to lift the upper die by applying a lifting force to the upper die to separate the upper and lower clamping surfaces and release the lifting force to lower the upper die. 2. The hole punching device according to claim 1, wherein a plurality of sets of the punch and the die are provided for performing a plurality of types of hole processing on the material, and the upper die and the lower die are provided with the punch and the die. A hole punching device wherein any combination of dies is movably supported for positioning at a hole drilling position. 3. The punching device according to claim 2, wherein the pressurizing means includes a selecting means for causing any one of a plurality of sets of punches and dies located above and below the material to perform a hole processing. A hole punching device, comprising: 4. The hole punching device according to claim 3, wherein the selection unit is supported by the moving unit that moves in accordance with the drilling position above the material, and that is vertically movable by the moving unit. A plurality of pressure portions which can be raised to release the pressing force of the pressurizing means, and a restricting portion for selectively restricting the rise of the pressure portions and transmitting the pressing force of the pressing means to the punch via the pressure portion. And a hole punching device.