JP2002282963A - Punch die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punch die where, when the height of a blade edge is adjusted, a punch guide does not touch the blade edge while being drawn out from a retainer collar and the position alignment of a positioning pin and an engaging hole can be easily carried out in turning the punch guide. SOLUTION: Regarding the punch die P, the height adjustment of the blade edge 31A of a punch body 31 is carried out by the combination of the positioning pin 39, which is installed on the retainer collar 35 and the punch guide 30, and a plurality of engaging holes 38. An elastic body 36 is installed on the retainer collar 35 or the punch guide 30, and grooves 40, 41 engaging with the elastic body 36 are formed having a plurality of stages in the vertical direction.

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 particular, when adjusting the height of a cutting edge, when the punching guide is removed from the retainer collar, the punching guide does not come into contact with the cutting edge, so that the punching guide and the positioning pin are rotated. The present invention relates to a punch die that facilitates alignment with a mating hole.

[0002]

2. Description of the Related Art A conventional punch press, for example, a turret punch press has a configuration shown in FIG. 10, in which a punch die P is mounted on an upper turret 60, and a die die D is mounted on a lower turret 70, and the punch die P is mounted on the lower turret 70. Is provided with a ram 65.

[0003] A punch guide 61 is mounted on the upper turret 60 via a lift spring 62. The punch guide 61 has a retainer collar via an elastic body 69 and a groove 73, and a positioning pin 71 and an engaging hole 72. 68 are attached.

A punch head 67 is supported on the retainer collar 68 via a stripper spring 63, and a punch driver 76 is provided integrally with the punch head 67.

The punch driver 76 penetrates the retainer collar 68 through a key 75 on the retainer collar 68 side. A punch body 64 is screwed to a lower end of the punch driver 76 so as to be movable up and down. Are guided through the punch guide 61 via the key 74.

With this configuration, when the ram 65 is operated and the punch head 67 is pressed, the lift spring 6
2 is bent, and the stripper plate 66 at the tip of the punch guide 61 contacts the work W on the die D.

Next, the stripper spring 63 is bent while the punch guide 61 is kept as it is, and for example, the work W is punched by the cutting edge 64A at the tip of the punch body 64.

[0008]

[Problems to be solved by the invention]

However, if the punch die P has been used for a long time, the cutting edge 64A is reduced, so that it is necessary to grind. After polishing, the height of the cutting edge 64A must be adjusted by the amount of polishing. No.

That is, in FIG. 10, after the cutting edge 64A is polished, if the height is not adjusted by changing its height, a predetermined punching is performed on the work W on the die D held by the stripper plate 66. Cannot be processed.

Therefore, as shown in FIG. 11, only the punch die P is taken out from the turret punch press (FIG. 10), and the groove 73 and the engaging hole 72 on the punch guide 61 side are formed into the elastic body 69 on the retainer collar 68 side. Then, the punch guide 61 is removed from the retainer collar 68 by removing the punch guide 61 from the positioning pin 71.

Thereafter, when the punch guide 61 is rotated, the punch body 64 guided by the punch guide 61 via the key 74 can be rotated with respect to the punch driver 76. Adjustment is possible.

However, in the conventional punch die P,
As shown in the figure, only one groove 73 is provided on the punch guide 61 side.

Therefore, when the groove 73 on the punch guide 61 side is removed from the elastic body 69 on the retainer collar 68 side,
The momentum at the time of removal cannot be stopped, and the opening 77 of the punch guide 61 may come into contact with the cutting edge 64A.

As a result, the punch die P has various adverse effects such that it cannot be reused unless the punch body 64 is modified.

Further, a groove 73 of the punch guide 61 is formed (see FIG. 1).
1) The vertical position when the retainer collar 68 is removed from the elastic body 69 is not determined, and therefore the positioning pin 71
And the engaging hole 72 may interfere with each other or may be too far apart.

Therefore, when the punch guide 61 rotates, it is difficult to align the positioning pin 71 with the engaging hole 72.

An object of the present invention is to adjust the position of a positioning pin and an engaging hole during rotation of a punch guide when the punch guide is removed from a retainer collar when the punch guide is removed from the retainer collar in the case of height adjustment of the blade. To provide a punch die that can easily perform the punching.

[0019]

According to the present invention, as shown in FIG. 1, (A) a height adjustment of a cutting edge 31A of a punch body 31 is provided to a retainer collar 35 and a punch guide 30 as shown in FIG. (B) An elastic body 36 is provided on the retainer collar 35 or the punch guide 30, and the punch guide 30 or the retainer collar 35 is provided with the elastic body 36. Grooves 40, 41 engaging body 36
Are formed in a plurality of steps in the vertical direction, and a technical means called a punch die P is provided.

Therefore, according to the punch die P of the present invention (FIG. 1), for example, the plurality of grooves 40 and 41 are
0 and an upper groove 40, an elastic body 36 is provided on the retainer collar 35 side, an upper groove 40 and a lower groove 41 are formed on the punch guide 30 side, and the upper groove 40 and the lower groove 41 are formed as shown in FIG. The horizontal position X ₀ of the innermost portions 40A-2 and 41A-2 is defined as a common reference position X _0, and each groove 40,
41, the difference d between the reference position X ₀ is small small difference portion 41A
a and the difference D is greater great difference portion 40Aa of the reference position X ₀
With respect to the flat portion 42 between the upper groove 40 and the lower groove 41, the small difference portions 40Aa, 41Aa of each groove 40, 41 are arranged close to each other, the large difference portions 40Ab, 41Ab are arranged away from each other, The vertical distance G between the upper groove 40 and the lower groove 41 (FIG. 4) is equal to the engagement hole 38 of the positioning pin 39.
Is configured to be larger than the penetration depth g.

With this configuration, initially (FIG. 5A)
If the elastic body 36 is engaged with the lower groove 41 on the punch guide 30 side, the elastic body 36 can be removed only by pulling out the punch guide 30 from the retainer collar 35 with an extremely weak force (FIG. 5B). ) Since it easily comes off the small difference portion 41Aa of the lower groove 41, passes through the flat portion 42, moves to the small difference portion 40Aa of the upper groove 40 and engages with the upper groove 40 (arrow), the elastic body 3
6 cannot be moved any more because it is blocked by the large difference portion 40Ab of the upper groove 40 and cannot be easily removed by ordinary force. At that time, the positioning pin 39 is moved to the initial engagement hole (FIG. 5B). 38-a.

Therefore, the punch guide 30 (FIG. 5)
(B)), the upper groove 40 is stopped in a state of being engaged with the elastic body 36, and the opening of the punch guide 30 is excessively moved to the cutting edge 3
No contact with 1A.

In addition, since the position of the punch guide 30 in the vertical direction with respect to the retainer collar 35 is determined (FIG. 5B), if the punch guide 30 is rotated as it is (FIG. 5C), the punch guide is rotated. The positioning between the positioning pin 39 and the next engagement hole 38-b during 30 rotations is facilitated (FIG. 5D).

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings according to embodiments. FIG. 1 is a perspective view of a punch die P according to the present invention.

As is well known, the punch die P is a die for punching a workpiece W in cooperation with a die die D (FIG. 9).

The punch die P shown in FIG.
The punch head 32 is a portion against which a ram 2 described below (FIG. 9) presses, penetrates a retainer collar 35 (FIG. 1), and a punch body 31 is screwed into a lower portion 32B thereof. I have.

The punch body 31 (FIG. 1) has its key 4
It is guided by the punch guide 30 via the key groove 43 on the side of the punch guide 30 and the punch guide 30, and the height of the cutting edge 31A is adjusted.

On the other hand, the retainer collar 35 is guided via the key 45 to the punch head 32 (FIG. 8).

The upper surface of the flange 35A of the retainer collar 35 (FIG. 1) and the flange 32A of the punch head 32
, A stripper spring 33 is fitted between the lower surfaces.

With this configuration, the punch head 32 is pressed upward by the restoring force of the stripper spring 33, and the punch head 32 is locked to the retainer collar 35 by the O-ring 3 (FIG. 8).

A positioning pin 39 is provided on a flange 35A (FIGS. 1 and 8) of the retainer collar 35, and the positioning pin 39 is provided with a plurality of engagement holes formed on the flange 30A of the punch guide 30. 38.

In this case, the pitch interval p between the plurality of engagement holes 38 (FIG. 1) corresponds to the height adjustment amount H of the cutting edge 31A of the punch body 31.

With this configuration, for example, the lower groove 41 of the punch guide 30 is removed from an elastic body 36 described later provided on the retainer collar 35 (FIG. 5B), and the upper groove 40 is engaged with the elastic body 36. After the punch guide 30 is rotated in the state (FIG. 5C), if the positioning pin 39 is inserted into the predetermined engagement hole 38-b (FIG. 5D), the height adjustment of the cutting edge 31A of the punch body 31 is performed. It can be performed.

An elastic body 36 is provided at a lower portion 35B of the retainer collar 35. The elastic body 36 is, for example, O
A groove 4 of a punch guide 30 which will be described later.
0 and 41 are engaged.

As described above, the punch guide 30 is provided with a plurality of vertical grooves 40 and 41 for engaging with the elastic member 36. In the example shown in FIG.
Reference numerals 0 and 41 each include an upper groove 40 and a two-step groove including the upper groove 40.

The upper groove 40 and the lower groove 41 are formed inside the flange 30A of the punch guide 30, and the respective grooves 40, 4
1 are small difference parts 40Aa and 41Aa as shown in FIG.
And large difference parts 40Ab and 41Ab.

That is, each of the grooves 40 and 41 is
Storage portions 40A, 41A for storing the same when engaged with
Has its deepest portion 40A-2,41A-2, as shown, both of which are the position X ₀ of the horizontal direction (X axis direction) the same.

The innermost portions 40A-2, 41A-2
The position X ₀ as a common reference position X _0, the position of the lower end portion 40A-3 of the upper groove 40, the lower groove 41 upper portion 41A-1 of
Position of, in the same position X _1, upper groove 40 of the upper end portion 40
The position of A-1, the position of the lower end portion 41A-3 of the lower groove 41, in the same position X _2.

Thus, the innermost portions 40A-2, 41
The position X ₀ of A-2 is set as a reference position X ₀ , and each groove 40, 4
1, the difference between the reference position X ₀ = X ₀ -X ₁ = d is smaller small difference portion 40Aa, and 41Aa, difference = X ₀ between the reference position X ₀
With -X ₂ = D is greater great difference portion 40Ab, the 41Ab respectively.

Then, the upper groove 40 and the lower groove 41 are
2, with respect to the flat portion 42, the small difference portions 40Aa, 41Aa are arranged close to each other,
The large difference portions 40Ab and 41Ab are arranged apart from each other.

With this configuration, for example, initially (FIG. 5
(A)), when the elastic body 36 is engaged with the lower groove 41 on the punch guide 30 side and the punch guide 30 is pulled out from the retainer collar 35 with an extremely weak force (FIG. 5B).
As shown in FIG. 3, the elastic body 36 is first compressed by a small width d of the small difference portion 41Aa of the lower groove 41 and easily comes off from the lower groove 41 (arrow).

Next, the elastic body 36 easily detached from the lower groove 41 passes through the flat portion 42 in a compressed state as it is, and the small width d of the small difference portion 40Aa of the upper groove 40 is similarly reduced.
Only this time it is expanded to engage with the upper groove 40 (arrow).

Even if the punch guide 30 is to be further removed from the retainer collar 35, the elastic member 36 on the retainer collar 35 side has a large difference portion 40A in which the width D of the upper groove 40 is large.
b, so that it does not easily come off from the upper groove 40.

In this case, in order for the elastic body 36 to be disengaged from the upper groove 40, it must be compressed by a large width D of the large difference portion 40Ab as shown in the figure. It cannot be pulled out.

As described above, the punch guide 30 does not come out of the retainer collar 35 with normal force, and according to the present invention, the punch guide 30 is
As a result, the vertical position of the punch guide 30 with respect to the retainer collar 35 is determined, so that the positioning pin 39 and the engaging hole 38 can be easily aligned when the punch guide 30 rotates. (FIGS. 5C to 5D).

The small difference portion 40A of each of the grooves 40, 41 is formed.
The functions of a and 41Aa are also applicable when the punch guide 30 is rotated to adjust the height of the cutting edge 31A (FIG. 5C) and then inserted with an extremely weak force to return to the original position (FIG. 5D).
Similarly, the elastic body 36 engaged with the upper groove 40 is compressed by a small width d of the small difference portion 40Aa of the upper groove 40 and easily comes off (arrow), and the flat portion 42 is compressed as it is. And is now expanded by a similarly small width d of the small difference portion 41Aa of the lower groove 41 to engage with the lower groove 41.

Further, as shown in FIG. 4, the vertical distance G between the upper groove 40 and the lower groove 41 is larger than the depth g of the positioning pin 39 entering the engagement hole 38.

That is, initially (FIG. 4A), the lower groove 41 of the punch guide 30 is engaged with the elastic body 3 of the retainer collar 35, and the depth at which the positioning pin 39 has entered the engaging hole 38. The vertical distance G between the upper groove 40 and the lower groove 41 is made larger than g.

With this configuration, when the punch guide 30 is pulled out of the retainer collar 35 (FIG. 4B), the lower groove 41 of the punch guide 30 is removed from the elastic body 36, and the upper groove 40 is engaged with the elastic body 36. Then, the positioning pins 39 are simultaneously disengaged from the engagement holes 38.

Therefore, as described later, the punch guide 3
By rotating 0 (FIG. 5C), the height of the cutting edge 31A can be adjusted (FIG. 5D).

FIG. 6 shows a case in which the elastic body 36 is provided on the punch guide 30 side, and a plurality of grooves 40, 41, for example, two grooves including the upper groove 40 and the upper groove 40 are formed on the retainer collar 35 side. ing.

FIGS. 1 to 5 and FIG. 6 (FIG. 7) are different on the side (outside or inside) where the elastic body 36 and the grooves 40 and 41 are engaged.
The way of movement of the elastic body 36 when the elastic body 36 is pulled out from the lower groove 41 (from the lower groove 41 to the upper groove 40 or from the upper groove 40 to the lower groove 41) is different.

That is, FIGS. 1 to 5 show that the grooves 40 and 41 are recessed outward (for example, FIG. 3), and the elastic body 36 is correspondingly engaged with the grooves 40 and 41 on the outside. It has become.

On the other hand, in FIG. 6 (FIG. 7), as shown, the grooves 40 and 41 are depressed inward, and correspondingly, the inside of the elastic body 36 is also engaged with the grooves 40 and 41. Are adapted.

1 to 5, as described above, the punch guide 30 initially has the lower groove 4 (for example, FIG. 3).
1 is engaged with the elastic body 36 on the retainer collar 35 side, and when the punch guide 30 is removed from the retainer collar 35, the elastic body 36 moves from the lower groove 41 through the flat portion 42 to the upper groove 40 ( Arrow).

On the other hand, FIG. 6 (FIG. 7) shows that the punch guide 30 initially has the elastic body 36 engaged with the upper groove 40 on the retainer collar 35 side (for example, FIG. 7). When the guide 30 is removed from the retainer collar 35, the elastic body 36 moves from the upper groove 40 through the flat portion 42 to the lower groove 41 (arrow).

The difference in the manner in which the elastic body 36 moves is the same when the punch guide 30 is inserted to return it to its original position.

That is, FIGS. 1 to 5 show that, as described above, after the punch guide 30 is rotated (FIG. 5C), the upper groove 4 is formed.
When the punch guide 30 is inserted into the retainer collar 35 (FIG. 5D), the elastic body 36 passes from the upper groove 40 through the flat portion 42. And moves to the lower groove 41 (arrow).

On the other hand, in FIG. 6 (FIG. 7), similarly, after the punch guide 30 is rotated, the elastic body 36 on the retainer collar 35 side is engaged with the lower groove 41 (FIG. 7). When the punch guide 30 is inserted into the retainer collar 35, the elastic body 36 moves from the lower groove 41 to the upper groove 40 through the flat portion 42 (arrow).

However, also in the case of FIG. 6 (FIG. 7), the fact that the punch guide 30 does not come out of the retainer collar 35 with a normal force is exactly the same as in FIGS.

That is, as shown in FIG. 7, when the elastic body 36 on the punch guide 30 side is initially engaged with the upper groove 40 on the retainer collar 35 and the punch guide 30 is detached from the retainer collar 35, First, the elastic body 36 is
It is compressed by the small width d of the small difference portion 40Aa of 0 and easily comes off from the upper groove 40 (arrow).

Next, the elastic body 36 which has easily come off from the upper groove 40 passes through the flat portion 42 in a compressed state as it is, and similarly has a small width d of the small difference portion 41Aa of the lower groove 41.
Only this time, it is expanded and engaged with the lower groove 41 (arrow).

Thereafter, when the punch guide 30 is to be pulled out of the retainer collar 35, the punch guide 3
The elastic body 36 on the 0 side has a large difference portion 4 in which the width D of the lower groove 41 is large.
Since it is in contact with 1Ab, it is obstructed by it and cannot easily come off from the lower groove 41.

In this case, in order for the elastic body 36 to come off from the lower groove 41, it must be compressed by a large width D of the large difference portion 41Ab as shown in the figure, and the punch guide 30 is moved from the retainer collar 35 with a normal force. It cannot be pulled out.

As described above, the punch guide 30 does not come out of the retainer collar 35 with a normal force, and according to the present invention, as shown in FIGS. Not to touch,
Thereby, the position of the punch guide 30 in the vertical direction with respect to the retainer collar 35 is determined.
Positioning of the positioning pin 39 and the engagement hole 38 during rotation becomes easy.

For example, the punch die P of FIG. 1 having the above configuration is applied to, for example, a turret punch press (FIG. 8), in which the upper frame 1 is provided with the ram 2 and the upper turret 6 is provided with the punch die P. The lower turret 7 has the punch die P
And die dies D which cooperate with each other.

The upper turret 6 includes a lift spring 3
4, the flange 3 of the punch guide 30 in which a two-step groove including the above-described upper groove 40 and the lower groove 41 is formed inside.
OA is supported.

The punch guide 30 is attached to the upper turret 6 via a key 44 so as to be freely guided. At the lower end of the punch guide 30, a stripper plate 37 for holding the work W is attached.

The punch body 31 is guided into the punch guide 30 via a key 42,
Is screwed into a lower portion 32B of the punch head 32. The punch head 32 penetrates the retainer collar 35 and is supported by the retainer collar 35 via the stripper spring 33, as described above.

In the state shown in FIG. 8, the punch head 32 is moved by the restoring force of the stripper spring 33.
It is locked to a retainer collar 35 via the O-ring 3.

However, when the ram 2 is actuated during processing (FIG. 9), the ram 2 presses the punch head 32, so that the lift spring 34 first bends and the punch guide 30
The stripper plate 37 at the tip contacts the work W on the die D.

Next, the stripper spring 33 bends while the punch guide 30 remains as it is, the punch head 32 descends, and the O-ring 3 separates from the retainer collar 35, and the tip of the punch body 31 screwed to the punch head 32. For example, the workpiece W is punched by the cutting edge 31A.

FIG. 1 shows a state in which the punch die P having such an action is removed from the upper turret 6, and the height of the cutting edge 31A is adjusted in the state of FIG.

Hereinafter, the operation of the present invention having the above configuration will be described in detail with reference to FIG.

(A) Initial position. For example, as shown in FIG. 5A, the cutting edge 31A of the punch body 31 is located at the position shown in the figure, and the elastic body 36 on the retainer collar 35 side is connected to the lower groove 41 on the punch guide 30 side.
And the positioning pin 39 is engaged with the engaging hole 3.
8-a.

(B) Operation for pulling out the punch guide 30 from the retainer collar 35.

Next, from the state shown in FIG. 5A, the punch guide 30 is pulled out of the retainer collar 35 with an extremely weak force (FIG. 5B).

As a result, the elastic body 36 on the retainer collar 35 side is compressed by the small width d of the small difference portion 41Aa of the lower groove 41 as shown in FIG. Then, it passes through the flat portion 42 in the compressed state as it is, and is expanded by the small width d of the small difference portion 40Aa of the upper groove 40 to engage with the upper groove 40.

Therefore, the punch guide 30 has the upper groove 4
5B stops at the position shown in FIG. 5B where the punch guide 30 is engaged with the elastic body 36, and the punch guide 30 cannot be pulled out of the retainer collar 35 with a normal force.

At this time, the positioning pins 39 on the retainer collar 35 are disengaged from the original engagement holes 38-a on the punch guide 30 side, and the punch guide 30 is rotatable.

(C) Rotating operation of the punch guide 30.

When the punch guide 30 is rotated from the state shown in FIG. 5B, the punch body 31 guided via the key 42 is lowered, and the cutting edge 31A is moved to the state shown in FIG.
Is lower than H by.

At this time, the positioning pin 39 on the retainer collar 35 is located immediately above the next engagement hole 38-b on the punch guide 30 side.

(D) Positioning of the positioning pin 39 and the engaging hole 38.

From the state shown in FIG. 5C, the punch guide 30 is inserted into the retainer collar 35 with an extremely weak force (FIG. 5D).

Thus, as shown in FIG. 3 (arrow), the elastic body 36 on the side of the retainer collar 35 is compressed by a small width d of the small difference portion 40Aa of the upper groove 40, and is easily separated from the upper groove 40. Then, it passes through the flat portion 42 in the compressed state as it is, and then expands by the small width d of the small difference portion 41Aa of the lower groove 41 to engage with the lower groove 41.

Then, at this time, the positioning pin 39 is inserted into the next engagement hole 38-b, the positioning of both is completed, and the height adjustment of the cutting edge 31A is completed at the same time.

In the above description of the operation, the elastic member 36
Is provided on the retainer collar 35 side, and a plurality of grooves 40,
Although the case where 41 is formed on the punch guide 30 side has been described in detail (FIGS. 1 to 6), the present invention is not limited to this.
In the opposite case (FIG. 6 (FIG. 7)), the same operation and effect can be obtained.

Further, in the above description of the operation, the case where the punch guide 30 is rotated counterclockwise (FIG. 5) is described in detail. However, the present invention is not limited to this, and the punch guide 30 is rotated clockwise. If you do,
With the punch guide 30 stopped, the punch head 32
The same operation and effect can be obtained even when is rotated.

[0090]

As described above, according to the configuration of the present invention,
When adjusting the height of the cutting edge, when the punch guide is pulled out of the retainer collar, the punch guide does not contact the cutting edge,
The technical effect of providing a punch die that facilitates the alignment between the positioning pin and the engaging hole when the punch guide rotates is achieved.

[0091]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a punch die P according to the present invention.

FIG. 2 is a view showing a relationship between an elastic body 36 and grooves 40 and 41 constituting the present invention.

FIG. 3 is a detailed view of grooves 40 and 41 constituting the present invention.

FIG. 4 is a diagram showing a relationship between grooves 40 and 41 and positioning pins 39 constituting the present invention.

FIG. 5 is an operation explanatory diagram according to the present invention.

FIG. 6 is a diagram showing another embodiment of the present invention.

FIG. 7 is a detailed view of grooves 40 and 41 of FIG.

FIG. 8 is a diagram showing an application example of a punch die P according to the present invention.

FIG. 9 is a view showing a processing state of FIG. 5;

FIG. 10 is an explanatory diagram of a configuration of a conventional technique.

FIG. 11 is an explanatory diagram of a problem in the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper frame 2 Ram 3 O-ring 6 Upper turret 7 Lower turret 30 Punch guide 31 Punch body 32 Punch head 33 Stripper spring 34 Lift spring 35 Retainer collar 36 Elastic body 37 Stripper plate 38 Engagement hole 39 Positioning pin 40, 41 groove 40A , 41A Storage part 40A-1, 41A-1 Upper end part 40A-3, 41A-3 Lower end part 40A-2, 41A-2 Innermost part 40Aa, 41Aa Small difference part 40Ab, 41Ab Large difference part 42, 44, 45 key 43 Keyway D Die mold P Punch mold W Work

Claims (7)

[Claims] 1. A punch die for adjusting the height of a blade edge of a punch body by a combination of a retainer collar, a positioning pin provided on a punch guide, and a plurality of engagement holes, wherein an elastic body is provided on the retainer collar or the punch guide. ,
A punch die, wherein a plurality of grooves are formed in a punch guide or a retainer collar in a vertical direction to engage with the elastic body. 2. The punch die according to claim 1, wherein said plurality of grooves are formed by two steps of an upper groove and a lower groove. 3. The horizontal position of the innermost part of the upper groove and the lower groove is set as a common reference position, and each groove has a small difference portion with a small difference from the reference position and a large difference with the reference position. 3. The punch die according to claim 2, having a large difference portion. 4. The punching metal according to claim 2, wherein, with respect to the flat portion between the upper groove and the lower groove, the small difference portion of each groove is arranged close to each other, and the large difference portion is arranged away from each other. Type. 5. The vertical distance between the upper groove and the lower groove is:
3. The punch die according to claim 2, wherein the depth of the positioning pin is greater than the depth of the positioning pin entering the engagement hole. 6. The apparatus according to claim 1, wherein a pitch interval between the plurality of engagement holes corresponds to a height adjustment amount of a cutting edge of the punch body.
The punch mold described. 7. The punch die according to claim 1, wherein said elastic body is constituted by an O-ring.