JPH10277997A - Punch die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punch die with an excellent workability which can remove a work piece simply without generating a breaking and a bending. SOLUTION: This punch die 11 has positioning projections 21A to 21F allowable to insert and remove to positioning holes 3 formed on a work piece 13 projected from a processing surface 13. The inserting condition of the positioning projections 21A to 21F to the positioning holes 3 is changed to an ejecting condition and an absorbing condition, for example, in the punching time and the taking out time of the work piece 13, by an inserting condition change-over means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching die in which a positioning projection which can be inserted into and removed from a positioning hole formed in a workpiece projects from a processing surface.

[0002]

2. Description of the Related Art In a process for manufacturing a printed wiring board, there is a case where a flexible and thin base material is punched to obtain a base material having a smaller area.

FIGS. 12 and 13 schematically show a punching die 61 used at that time. The punching die 61 includes positioning pins 63 at a plurality of positions on the processing surface 62. Each positioning pin 63 is inserted into a positioning hole 65 of a base material 64 which is a workpiece.
As a result, the displacement of the base material 64 in the horizontal direction is prevented, and the positioning of the base material 64 is achieved. Then, when the convex portion of the punching jig (not shown) is fitted into the relief concave portion 66 of the punching die 61, the base material 64 is punched into a predetermined shape. After the punching is completed, first, the jig is removed, one end of the base material 64 is gripped by the tweezers 67, and the base material 64 is gradually pulled up from one side. Then, the positioning hole 65
Then, the positioning pins 63 are pulled out of the substrate, and the base material 64 is removed from the processing surface 62. In addition, a counterbore 68 is formed at a predetermined position on the lifting side end of the processing surface 62 so that the tip of the tweezers 67 can be easily inserted.

[0004]

However, since little clearance is secured between the positioning pin 63 and the positioning hole 65, when the tweezers 67 is quickly pulled up, the positioning pin 63 is moved into the positioning hole 65. It gets caught. Then, there is a drawback that the substrate 64 is likely to bend or break due to excessive stress being applied due to the hooking at this time (see FIG. 13). Therefore, the operator has to carefully lift the substrate 64 with the tweezers 67 so as not to apply excessive stress. Therefore, conventionally, the work of removing the base material 64 has been extremely troublesome and time-consuming. This has also led to a deterioration in workability.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a first object of the present invention is to allow a workpiece to be easily removed without being bent or bent.
It is to provide a punching die excellent in workability.

A second object of the present invention is to provide a punching die which has the above-mentioned excellent characteristics and has a simple structure, so that it is easy to manufacture and inexpensive.

[0007]

In order to solve the above-mentioned problems, according to the first aspect of the present invention, a positioning projection which can be inserted into and removed from a positioning hole formed in a workpiece projects from a processing surface. In the punching die, the insertion state of the positioning convex portion with respect to the positioning hole is changed to a difficult extraction state when the workpiece is punched, and an insertion state changing means for changing the insertion state to an easy extraction state at the time of removal is provided. The gist is a punching die characterized by the following.

According to a second aspect of the present invention, in the first aspect, the insertion state changing means relatively moves the positioning projection to a position protruding from the processing surface by the time of starting punching of the workpiece. Further, the projection driving means is configured to relatively move the positioning projection to a position where the positioning projection is immersed in the processing surface until the workpiece is taken out.

According to a third aspect of the present invention, in the second aspect, the convex drive means is disposed on the convex support for supporting the positioning convex, and is positioned above the convex support and positioned. A workpiece support having a projection insertion hole, interposed between the projection support and the workpiece support, and alternately switched between an extended state and a contracted state by the application of a pressing force. With this configuration, the extension support mechanism is configured to include a telescopic lock mechanism that locks the convex portion support at the raised position or the lowered position.

Hereinafter, the "action" of the present invention will be described. According to the first aspect of the present invention, at the time of punching, the positioning projection inserted into the positioning hole is in a difficult-to-extract state, so that the workpiece is held immovably with respect to the processing surface.
Therefore, at this time, the workpiece is positioned.
On the other hand, at the time of taking out, as a result of the insertion state changing means changing the insertion state, the positioning projection inserted into the positioning hole is in the easy extraction state. For this reason, the unmovable workpiece can be easily removed from the positioning projection. Accordingly, the workpiece is less likely to be caught in the positioning hole during removal, and the accompanying break or bend is reliably prevented. In addition, since the removal of the workpiece is simplified, the work is not required to be as careful as in the past, and as a result, the workability is improved.

According to the second aspect of the present invention, the positioning projection is relatively moved to a position protruding from the processing surface, so that the positioning projection is in a difficult-to-extract state. By the relative movement, the positioning convex portion is easily pulled out. Also, with such a structure,
Since it can be realized by a relatively simple mechanism, it can be easily manufactured and is suitable for cost reduction.

According to the third aspect of the invention, at the time of starting punching, the telescopic lock mechanism constituting the convex drive means is in a contracted state, and the convex support is locked at the raised position. Therefore, when a pressing force is applied to the convex support by a punching jig or the like, the retractable locking mechanism in the contracted state is switched to the extended state, and the convex support is locked in the lowered position. At this time, the positioning projection supported by the projection supporter relatively moves to a position where it is immersed in the processing surface. Therefore, the workpiece is easily pulled out, and the workpiece can be easily removed. When the pressing force is applied again, the telescopic lock mechanism is in the contracted state, and the projection support is locked at the raised position. At this time, the positioning protrusion supported by the protrusion support relatively moves to a position protruding from the processing surface. Therefore, it becomes difficult to pull out, and the workpiece is positioned.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment in which the present invention is embodied in a punching die 11 for punching a wide substrate 1 for manufacturing a printed wiring board will be described in detail with reference to FIGS. I do.

FIG. 1 shows a wide substrate 1 for manufacturing a printed wiring board which is subjected to a punching process in this embodiment. The wide substrate 1 is flexible and has a thickness of 0.16 mm. As the base material, for example, polyimide, epoxy, or the like is used. From the product region R1 of the wide base material 1, a plurality of rows (here, four rows)
The narrow base materials 2a, 2b, 2c, and 2d are collected. Both edge sides of the product area R1 are edge areas R2 and R3.
Sprocket holes 3 as positioning holes are formed in the edge regions R2 and R3. The sprocket holes 3 have a rectangular shape and are arranged in a large number along the longitudinal direction of the base material.

FIGS. 2 and 5 show a punching die 11 used in the punching process. The upper surface of the punching die 11 is a processing surface 13 for holding the wide substrate 1 as a workpiece. Processing surface 1
3 is formed to be slightly larger than the wide base material 11. The punching die 11 has a relief recess 12.
There are a plurality of escape recesses 12 (four in this case). Each relief recess 12 is open in the processing surface 13.
The shape of the opening of each relief recess 12 is rectangular, as is the outer shape of the narrow bases 2a to 2d, which are punched pieces. The relief recesses 12 are arranged in parallel at a predetermined interval.

A lifter 14 for lifting the narrow base materials 2a to 2d obtained by punching is provided in each escape recess 12 so as to be able to move up and down. This lifter 14
Elevating plate 1 approximately equal in shape to the opening of relief recess 12
5 and a spring 16 as urging means for urging the same from the lower surface side. The elevating plate 15 urged by the spring 16 is designed such that the upper surface is always at the same level as the processing surface 13.

Next, the positioning structure of the punching die 11 will be described. The punching die 11 of the present embodiment includes positioning pins 21A to 21A as positioning protrusions.
A positioning structure including 1F is provided. Positioning pin 2
1 </ b> A to 21 </ b> F are mainly for preventing a displacement of the wide base material 1 in the horizontal direction, and are provided at a plurality of positions on the processing surface 13. In this embodiment, the number of the installation locations is six. Among them, positioning pin 2
Three of 1A, 21B, and 21C exist in the left end side of FIG. Each of the positioning pins 21A to 21C is inserted into a sprocket hole 3 belonging to an edge region R2 on one edge side in the width direction of the wide base material 1. These positioning pins 21A to 21C are on a straight line and are arranged at substantially equal intervals. The remaining three positioning pins 21D, 21
E and 21F exist on the right end side in FIG. The positioning pins 21D to 21F are inserted into the sprocket holes 3 belonging to an edge region R3 on the other edge side in the width direction of the wide base material 1. These positioning pins 21D to 21F
Are also on a straight line and are arranged at substantially equal intervals.

As shown in FIG. 8, each positioning pin 2
1A to 21F have a structure that can appear and disappear from the processing surface 13. Each of the positioning pins 21A to 21F is
3 and a piston portion 24. The piston part 24 is formed on the lower end side, which is the non-projecting end side of the rod part 23.

A tip 23a is formed at the tip of the rod portion 23 of each of the positioning pins 21A to 21F. The cross-sectional shape of the shaft portion 23b closer to the base end than the cusp 23a is
The opening shape of the sprocket hole 3 is substantially equal. Therefore, when each of the positioning pins 21A to 21F is inserted deeply into the sprocket hole 3, the shaft 2
Clearance between the sprocket hole 3b and the sprocket hole 3 becomes almost impossible. Therefore, the wide base material 1 becomes immovable and enters the positioning state. At this time, each of the positioning pins 21 </ b> A to 21 </ b> F does not easily fall out of the sprocket hole 3. On the other hand, when each of the positioning pins 21 </ b> A to 21 </ b> F is inserted shallowly into the sprocket hole 3, a clearance is generated between the pointed head 23 a and the sprocket hole 3. Therefore, the wide substrate 1 is not immovable. At this time, each of the positioning pins 21 </ b> A to 21 </ b> F easily comes out of the sprocket hole 3.

Further, the intermediate plate 3 constituting the punching die 11
1 is provided with a cylindrical pressure chamber 25, and the piston portion 24 is accommodated therein. In addition, the piston part 24 can reciprocate a predetermined distance along the up-down direction. The pressure chamber 25 and the processing surface 13 are
1 are communicated with each other by an insertion hole 26 provided through. The rod portion 23 is inserted into the insertion hole 26 so as to be able to slide straight in the vertical direction.

The working chamber 25 is divided into a first pressure region 25a and a second pressure region 25b by the piston portion 24. In a second pressure region 25b on the lower surface side of the piston portion 24, a return spring 27 as a positioning projection urging means is accommodated. The lower end of the return spring 27 is in contact with the bottom surface of the pressure chamber 25. The upper end of the return spring 27 is in contact with a concave spring seat 28 formed at the center of the lower end surface of the piston portion 24. Therefore, each of the positioning pins 21A to 21F is always urged upward (projecting direction). When the positioning pins 21A to 21F are located at positions as shown in FIG.
A to 21F are projected from the processing surface 13. Therefore, the six positioning pins 21 </ b> A to 21 </ b> F are fitted into the sprocket holes 3. That is, the wide base material 1 is positioned at six positions, whereby the wide base material 1 is fixed to the processing surface 13.

The middle plate 31 has a first port 29 and a second port 29.
Port 30 is formed. These ports 29,
The opening 30 is opened on the side surface of the punching die 11, for example. A pressure fluid (for example, pressurized air or the like) is supplied to the first port 29 via an electromagnetic valve (not shown). Further, the first port 29 communicates with the first pressure region 25a, and the second port 30 communicates with the second pressure region 25b.

Therefore, when the pressurized fluid is supplied to the first port 29 when the positioning pins 21A to 21F are in the state shown in FIG. 8A, the pressure in the first pressure region 25a increases, The portion 24 is pressed toward the second pressure region 25b. As a result, as shown in FIG. 8B, each of the positioning pins 21A to 21F moves downward (immersion direction). At this time, the fluid in the second pressure region 25b is
It is discharged to the outside of the punching die 11 via the second port 30. When the positioning pins 21A to 21F are located at positions as shown in FIG.
F is substantially immersed in the processing surface 13. Of course, it is good also as a structure which makes those 21A-21F completely immerse.

Next, when the supply of the pressure fluid to the first pressure region 25a is stopped, the piston portion 24 is pressed upward by the urging force of the return spring 27, and
1A to 21F return to the state of FIG. At this time, the fluid in the first pressure region 25a is discharged to the outside of the punching die 11 via the first port 29. The piston portion 24 also functions as an upward stopper for the positioning pins 21A to 21F.

That is, in the present embodiment, the piston 24,
The action chamber 25, the insertion hole 26, the return spring 27, the first port 29 and the second port 30 constitute a projection driving unit. And the convex part driving means of the present embodiment includes:
The positioning pins 21 </ b> A to 21 </ b> F are relatively moved to positions protruding from the processing surface 13 before the start of punching. Further, the protrusion driving means includes the narrow base materials 2a to 2d and the punched pieces 5,
By the time of taking out 6, the positioning pins 21A to 21F are relatively moved to a position where they are immersed from the processing surface 13. That is,
The protrusion driving means is an insertion state changing means that changes the insertion state of the positioning pins 21A to 21F into the sprocket hole 3 to a difficult extraction state at the time of punching and to an easy extraction state at the time of removal. .

The projection drive means is provided independently for each of the six positioning pins 21A to 21F. Therefore, each of the positioning pins 21A to 21F can independently perform a retracting operation.

As shown in FIG. 5, the punch jig 33
Has projections 34 at four locations corresponding to each relief recess 12. Also, the punching jig 33 has pin escape recesses 35 at six locations corresponding to the respective positioning pins 21A to 21F.
It has. Then, when this punching jig 33 is fitted to the punching die 11, the wide base material 1 is punched out,
Four narrow substrates 2a to 2d are obtained at a time.

Next, the procedure of the punching process using the punching die 11 will be described. First, as shown in FIG. 3 and FIG.
Fixed to At this time, the supply of the pressurized fluid to the working chamber 25 is not performed, and the positioning pins 21A to 21F are held at the projecting positions. Therefore, all of the six positioning pins 21 </ b> A to 21 </ b> F protruding from the processing surface 13 are fitted into the corresponding sprocket holes 3. The punching jig 33 is fitted to the punching die 11 in such a difficult punching state, and the wide base material 1 is punched out.

Next, the punching jig 33 is moved to the punching die 1.
After disconnecting from 1, the pressurized fluid to the working chamber 25 is supplied.
Then, the piston part 24 is pressed downward by the fluid pressure, and as shown in FIG.
1F moves to the immersion position. At this time, each of the positioning pins 21A to 21F is in an easily removable state. Therefore, the punched piece 5 becomes free, and the slide transfer in the width direction becomes possible. Also, the narrow base materials 2a to 2d and the punched pieces 6 can be slid and transferred in the width direction. Therefore, as shown in FIGS. 4 and 7, these narrow base materials 2a to 2d can be easily removed by sliding and transferring.

Now, the characteristic effects of the present embodiment will be enumerated below. (A) The punching die 11 of this embodiment is provided with an insertion state changing means for changing the insertion state of the positioning pins 21A to 21F into the sprocket hole 3 to a difficult extraction state at the time of punching and to an easy extraction state at the time of removal. ing. Further, the insertion state changing means relatively moves the positioning pins 21A to 21F to positions protruding from the processing surface 13 by the time of starting punching,
It is a convex part driving means for relatively moving 1F to a position where it is immersed in the processing surface 13.

Therefore, at the time of punching, the positioning pins 21A to 21F are relatively moved to the positions protruding from the processing surface 13, so that they become difficult to punch. Therefore, the wide substrate 1 is held immovable with respect to the processing surface 13. Therefore, at this time, positioning of the wide base material 1 is achieved.

On the other hand, at the time of removal, the positioning pins 21A to 21F are relatively moved to a position where they are immersed in the processing surface 13 by driving of the projection driving means. As a result, the positioning pins 21A to 21F, which have been in the difficult extraction state, can be easily extracted. That is, the insertion state is changed. Therefore, the punched workpiece (specifically, the punched piece 5) can be easily removed from the positioning pins 21A to 21F.
Therefore, the punched piece 5 is less likely to be caught in the sprocket hole 3 during removal, and the accompanying breakage or bending is reliably prevented. In addition, since the removal of the workpiece is simplified, the work is not required to be as careful as in the past, and as a result, the workability is improved.

(B) The punching die 1 of the present embodiment
As described above, No. 1 employs a convex portion driving means including a mechanism for moving the positioning pins 21A to 21F in and out.
Therefore, it can be realized with a relatively simple mechanism as compared with the others. For this reason, it can be easily manufactured and is suitable for cost reduction.

Note that the present invention is not limited to the above-described embodiment, but can be changed to, for example, the following forms. ◎ For example, it may be configured as a punching die 41 of another example shown in FIGS. 9A and 9B. The punching die 41 includes a pin support plate 42 as a projection support. At a plurality of locations on the upper surface of the pin support plate 42,
Positioning pins 21A to 21F protrude. On the upper side of the pin support plate 42, an upper plate 44 as a workpiece support is provided.
Is arranged. The upper plate 44 has a positioning projection insertion hole 45 at a predetermined position. A telescopic lock mechanism (such as a toggle switch) 43 is interposed between the upper plate 44 and the pin support plate 42. The telescopic lock mechanism 43 locks the pin support plate 42 at the raised position or the lowered position by alternately switching between the extended state and the contracted state by the application of a pressing force.

In the case of the punching die 41 configured as described above, at the start of punching, the telescopic lock mechanism 43 is in a contracted state, and the pin support plate 42 is locked at the raised position. Therefore, the pin support plate 4 is formed by a punching jig or the like.
When the pressing force is applied to 2, the retractable locking mechanism 43 that has been in the contracted state is switched to the extended state, and the pin support plate 42 is locked at the lowered position (see FIG. 9A). At this time,
Positioning pins 21A-supported by pin support plate 42
21F relatively moves to a position where it is immersed in the processing surface 13.
Therefore, the workpiece is easily pulled out, and the workpiece can be easily removed. When the pressing force is applied again, the telescopic lock mechanism 43 is in a contracted state, and the pin support plate 42 is locked at the raised position (see FIG. 9B). At this time,
Positioning pins 21A-supported by pin support plate 42
21F relatively moves to a position protruding from the processing surface 13. Therefore, it becomes difficult to pull out, and the workpiece is positioned. With such a configuration, since the pressing force of the punching jig can be used, there is an advantage that there is no need to externally apply a driving force for performing the retracting operation.

In the punching die 46 of another example shown in FIGS. 10 (a) and 10 (b), the positioning pin 47 as the positioning projection is hollow and tapered, and an opening is formed on the lower surface side. It has. The positioning pin 47 has flexibility. Below the opening, a diameter-enlarging pin 48 is provided so as to be vertically movable. The diameter-enlarging pin 48 has a slightly larger diameter than the positioning pin 47 and can be fitted into and removed from the opening. Expanding pin 48
Is connected to a rod portion of a fluid pressure cylinder 49 as an actuator. Accordingly, when the fluid pressure cylinder 49 expands and contracts due to the supply and discharge of the fluid through the ports 29 and 30, the diameter-enlarging pin 48 moves up and down. In the case of the punching die 46 configured as described above, when the fluid pressure cylinder 49 is extended, the diameter-increase pin 48
Fits into the opening. Then, as shown in FIG. 10A, as a result of the positioning pins 47 being expanded, the diameter of the positioning pins 47 is increased, and a difficult extraction state is achieved. Conversely, when the hydraulic cylinder 49 is contracted, the diameter-enlarging pin 48 descends and comes off the opening. Then, as shown in FIG. 10B, the positioning pins 47 return to their original diameters, and as a result, are easily pulled out.

However, in terms of simplicity of construction and ease of manufacture, the punching die 11 of the above embodiment is superior. In the punching die 51 of another example shown in FIGS. 11A and 11B, the positioning pin 52 is divided in half in the vertical direction. The fixed side piece 52a constituting the positioning pin 52 is immovably erected on the processing surface 13. On the other hand, the base end of the movable side piece 52b reaches the inside of the upper plate 54. A base end side surface of the movable side piece 52b is provided with a fluid pressure cylinder 53 as an actuator.
Is connected to the rod portion. The fluid pressure cylinder 53 is placed horizontally. Therefore, ports 29, 30
When the fluid pressure cylinder 53 expands and contracts due to the supply and discharge of the fluid through the movable member 52b, the movable side piece 52b moves horizontally in the horizontal direction in the drawing. The punching die 5 configured as described above
In the case of 1, when the hydraulic cylinder 53 is contracted,
The movable side piece 52b moves to the left and is integrated with the fixed side piece 52a. Then, as shown in FIG. 11, the positioning pin 52 is substantially reduced in diameter, so that it is easily pulled out. Conversely, when the fluid pressure cylinder 53 is extended, the movable side piece 52b moves rightward and separates from the fixed side piece 52a. Then, as it were, the diameter of the positioning pin 52 is substantially increased, and a difficult extraction state is obtained.

However, in terms of simplicity of construction and easiness of manufacture, the punching die 11 of the above embodiment is still superior. ◎ Instead of the configuration of the embodiment in which the member having the processing surface 13 (that is, the upper plate 22) is on the fixed side and the positioning pins 21A to 21F are on the moving side, for example, the member with the processing surface 13 is on the moving side and the positioning pin 21A 21F may be a fixed side.

The insertion state changing means is not limited to the above embodiment or another example. For example, the insertion state changing means causes the positioning convex portion to vibrate in the easy extraction state and stop the vibration in the difficult extraction state. Such a thing may be used.

In the cylinder mechanism of the embodiment, the return spring 27 is omitted, and instead, both the pressure regions 25 are used.
The pressure fluid may be alternately supplied to a and 25b. However, according to the configuration of the embodiment, the positioning pins 21A to 21F need not always be supplied with the pressure fluid.
There is an advantage that is held in the protruding position.

Here, in addition to the technical ideas described in the claims, the technical ideas grasped by the above-described embodiments are listed below together with their effects. (1) The punching die according to any one of claims 1 to 3, wherein all of the positioning protrusions are capable of appearing and retracting.
With this configuration, the workpiece can be removed more easily.

(2) The punching die according to claim 2, wherein the positioning projection is a positioning pin having a pointed head at its tip. With this configuration,
By causing the positioning protrusion to perform the retracting operation, the amount of clearance that can be formed between the positioning protrusion and the positioning hole can be changed, so that the difficult extraction state and the easy extraction state can be easily realized.

(3) The punching die according to claim 2, wherein the projection driving means has a return spring.
According to this configuration, the positioning projection is held at a protruding position without always supplying a driving force to the driving unit.

The technical terms used in the present specification are defined as follows. "Positioning part urging means:
A biasing means for returning the positioning projection to a predetermined position is, for example, an elastic body such as rubber or a spring. "

[0045]

As described in detail above, according to the first to third aspects of the present invention, the workpiece can be easily removed without being bent or bent. Mold can be provided.

According to the second aspect of the present invention, since the configuration is simple, it is possible to provide a punching die which is easy to manufacture and inexpensive. According to the third aspect of the present invention, since the pressing force of the punching jig can be used, it is not necessary to externally apply a driving force for performing the retracting operation.

[Brief description of the drawings]

FIG. 1 is a plan view of a wide base material punched by a punching die according to an embodiment.

FIG. 2 is a plan view showing a punching die.

FIG. 3 is a plan view showing a wide base material and a punching die before punching.

FIG. 4 is a plan view showing a wide base material and a punching die after punching.

FIG. 5 is a schematic sectional view showing a wide base material and a punching die before punching.

FIG. 6 is a schematic sectional view showing a wide base material and a punching die after punching.

FIG. 7 is a schematic sectional view showing a wide base material and a punching die at the time of removal.

8A is an enlarged cross-sectional view of a main part showing a positioning pin and a projection driving unit at a protruding position, FIG. 8B is an enlarged cross-sectional view of a main part showing a positioning pin and a projection driving unit at a retracted position, (C) is an enlarged plan view of a positioning pin.

9A and 9B are enlarged schematic cross-sectional views of a main part showing another example of a punching die.

10A and 10B are enlarged schematic cross-sectional views of a main part showing another example of a punching die.

11A and 11B are enlarged schematic cross-sectional views of a main part showing another example of a punching die.

FIG. 12 is a partial schematic perspective view showing a state where a wide base material is fixed to a conventional punching die.

FIG. 13 is a partial schematic perspective view showing a state in which a punched piece is pulled up.

[Explanation of symbols]

1. Wide substrate for manufacturing printed wiring boards as a workpiece
3. Sprocket holes as positioning holes, 11, 4
1, 46, 51: punching die, 13: processed surface, 21A
... 21F, 47, 52... Positioning pins as positioning protrusions, 24... Piston portions forming protrusion driving means as insertion state changing means, 25... Action chambers forming the protrusion driving means, 26. Insertion hole constituting the unit driving means,
27 ... return spring constituting the projection drive means, 29,3
0: a port constituting the convex drive means; 42, a pin support plate as a convex support; 43, a telescopic lock mechanism constituting the convex drive; 44, an upper plate as a workpiece support; 45 positioning through hole

Claims (3)

[Claims] 1. A punching die in which a positioning projection that can be inserted into and removed from a positioning hole formed in a workpiece projects from a processing surface. A punching die provided with an insertion state changing means for changing to a difficult-to-remove state when punching a workpiece and changing to an easy-to-remove state when removing a workpiece. 2. The insertion state changing means relatively moves the positioning projection to a position protruding from the processing surface by the time of starting the punching of the workpiece, and the positioning by the time of taking out the workpiece. The punching die according to claim 1, wherein the die is a protrusion driving unit that relatively moves the protrusion to a position where the protrusion is immersed in the processing surface. 3. A convex support for supporting the positioning convex, and a workpiece support disposed above the convex support and having a positioning convex insertion hole. By interposing between the convex support and the workpiece support, by alternately switching between the extended state and the contracted state by the application of a pressing force, the convex support is moved to the raised position or 3. The punching die according to claim 2, comprising a telescopic lock mechanism that locks at a lowered position.