JP2002248524A - Progressive die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a progressive die, wherein the material being worked is not buckled when drawing, even for progressive dies having different structures for the first drawing process or for subsequent drawing processes. SOLUTION: When a first stripper plate 113 reaches the almost same height as a second stripper plate 223 by lowering a punch holder 100, a second punch plate 122 is designed to contact the second stripper plate 223 while maintaining the gap to a second backing plate 121.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a progressive die structure for progressively drawing a workpiece, for example.

[0002]

2. Description of the Related Art FIG. 3 is an explanatory view showing a schematic structure of a conventional progressive die. The progressive die shown in this figure has a lower movable stripper structure and is divided into a first block for a first drawing process and a second block for a subsequent drawing process.

In the drawing, reference numeral 300 denotes a punch holder shared by the first block and the second block, and 311 denotes a first punch backing plate on the first block side, which is attached to the lower surface of the punch holder 300. Reference numeral 312 denotes a first punch plate attached to the lower surface of the first punch backing plate 311, and 313 denotes a punch guide hole 31.
The first stripper plate 3a is supported by four first support pins 314 projecting downward by the elasticity of a first coil spring 315 provided on the punch holder 300.

[0004] The first stripper plate 313 described above
For example, the workpiece 1 is placed on a first die plate 412 described later.
It is formed in an inverted U-shape such that both ends in the longitudinal direction contact the first die plate 412 when 0 is pressed. Reference numeral 316 denotes a first drawing punch attached to the first punch plate 312, and the first stripper plate 31
3 is inserted into the punch guide hole 313a.

[0005] Reference numeral 321 denotes a second punch backing plate on the second block side, which is attached to the lower surface of the punch holder 300. Reference numeral 322 denotes a second punch plate attached to the lower surface of the second punch backing plate 321, and 323 denotes, for example, five punches attached to the second punch plate 322 at a predetermined pitch. The punches adjacent to the punch 316 are arranged in order for the second drawing, and the longest punch is used for the sixth drawing.

[0006] Reference numeral 400 denotes a die holder shared by the first block and the second block, which is provided below and opposite to the punch holder 300 described above. Reference numeral 411 denotes a first die backing plate on the first block side.
0. 412 is a first die backing plate 411 attached to a first die backing plate 411.
It is a die plate.

Reference numeral 421 denotes a second die backing plate on the second block side, which is attached to the upper surface of the die holder 400. 422 is a second die plate attached to the upper surface of the second die backing plate 421, 42
Reference numeral 3 denotes a second stripper plate disposed on the upper surface side of the workpiece 10 set at the feed line height, and a punch guide hole 423a is provided corresponding to each punch 323, respectively.
Second coil spring 425 provided on die holder 400
Are supported by four second support pins 424 that respectively protrude upward due to the elasticity of the second support pin 424. The second stripper plate 423 is formed, for example, in an inverted U-shape so that both ends in the longitudinal direction contact the second die plate 422, similarly to the first stripper plate 313 on the first block side.

Next, the operation of the conventional progressive die configured as described above will be described with reference to FIG. FIG. 4 is an explanatory view showing the operation of a conventional progressive die. When the punch holder 300 starts descending due to the descending from the top dead center of the press ram (not shown), the first stripper plate 313 on the first block side of the punch holder 300 is moved to the feed line height as shown in FIG. The second stripper plate 423 on the second block side is brought into contact with the set workpiece 10.
And the height of each punch 323 on the second block side.
Enters the drawn product of the workpiece 10 through the punch guide hole 423a in ascending order of the punch length. At this point, the second punch plate 322 on the second block side
There is a gap with the stripper plate 423.

When the punch holder 300 is further lowered from the state described above, the first stripper plate 313 on the first block side moves the workpiece 10 installed at the feed line height as shown in FIG. The second punch plate 322 on the second block side comes into contact with the second stripper plate 423 while being pressed down and comes into contact with the first die plate 412. At this time, the first stripper plate 313 on the first block side and the second stripper plate 42 on the second block side
Step 3 occurs, and the workpiece 10 between the first block and the second block is bent, and the drawn molded product on the second block side is inclined.

The reason for this is that the lowering timing of the first stripper plate 313 and the lowering timing of the second stripper plate 423 are different from each other as described above, and the elasticity of the second coil spring 425 provided on the die holder 400 causes the second blocker side to move. This is because the timing at which the second stripper plate 423 descends from the first stripper plate 313 on the first block side is delayed.

When the press ram further descends and reaches the bottom dead center, the first support pin 31 of the first stripper plate 313 on the first block side as shown in FIG.
4 presses the first coil springs 315 of the punch holder 300 upward, respectively, and the punch 316 on the first block side passes through the punch guide hole 313a and presses the workpiece 10 to perform drawing processing. The second stripper plate 423 on the side is the punch holder 300
Due to the pressure from the side, the workpiece 10 is pushed down to the second die plate 422 to come into contact with the elasticity of the second coil spring 425 of the die holder 400, and the workpiece 1 is bent.
Straighten 0 to flatten. At this time, the punches 323 on the second block side draw the respective drawn products.

Thereafter, the press ram rises from the bottom dead center to the top dead center, and lifts the punch holder 300 to a predetermined position. At this time, the operation is stopped at a predetermined position through an operation reverse to the operation described above. When the punch holder 300 is pulled up, the first and second stripper plates 313, 4
With 23, the punches 316 and 323 easily come out of the drawn product of the workpiece 10, and the workpiece 10 returns to the feed line height.

[0013]

As described above, this conventional progressive die has a structure on the first block side for the first drawing step and a structure on the second block side for the subsequent drawing step. However, this type of mold is often used for drawing a molded product with a small R portion at the drawing opening or a molded product that needs to have some function in the flange after drawing. Used.

However, in the conventional progressive die described above, the first stripper plate 313 on the first block side is used.
And the workpiece 10 bent by the difference in the lowering timing of the second stripper plate 423 on the second block side,
Although the second stripper plate 423 on the second block side is used to perform horizontal correction, it may not be completely flat depending on the degree of bending.

Conventionally, the distance between the first block and the second block is appropriately set in order to reduce the bending of the workpiece 10, but the pitch formed product is inclined to cause a slight pitch shift. Was. Due to this pitch shift, the center of the draw is shifted and the R portion and the inner peripheral surface at the mouth of the drawn product are sometimes cut off.

Further, in the case of a drawn product requiring a flange portion, eccentricity with the flange portion occurs due to a pitch shift as described above, and it is difficult to ensure accuracy.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and is a progressive die having different structures on a first block side for a first drawing step and a second block side for a subsequent drawing step. In particular, it is an object of the present invention to provide a progressive die that can suppress bending of a workpiece at the time of drawing.

[0018]

(1) A progressive die according to the present invention is mounted on a punch holder, a die holder provided opposite to the punch holder, and a punch holder, and is provided with a first drawing punch. A first punch plate having a first elastic member provided on the punch holder, a first stripper plate movably held by the punch holder and urged toward the die holder by the first elastic member, and a punch holder. A second elastic member provided on the second member and a punch for the second drawing and thereafter, the second elastic member being movably held by the punch holder and urged toward the die holder by the second elastic member.
A punch plate, a third elastic member provided on the die holder, and a feeder movably held by the die holder and urged toward the punch holder by the third elastic member to feed the workpiece at a feed line height. A second stripper plate disposed at a line position, wherein the first stripper plate abuts the workpiece by moving the punch holder toward the die holder, and presses the workpiece from the feed line height toward the die holder. When moving, the second punch plate presses the second stripper plate and moves the second stripper plate from the feed line position to the die holder side against the urging force of the third elastic material.

In the present invention, when the first stripper plate abuts on the workpiece and presses and moves the workpiece from the feed line height to the die holder side, the second punch plate presses the second stripper plate. Since the second stripper plate is moved from the feed line position to the die holder side against the urging force of the third elastic material, the work material at the feed line height is kept substantially horizontal. Can be moved to the die holder side, and bending of the workpiece can be suppressed.

(2) In the progressive die according to the present invention, in the above (1), the second elastic material is formed by forming the second punch plate when the workpiece is processed by the second or subsequent drawing punch. It has a biasing force that does not move relative to the punch holder in the moving direction of the punch holder.

In the present invention, the second elastic material is used when the workpiece is processed by the second or subsequent drawing punch.
Since the second punch plate has a biasing force that does not move relative to the punch holder in the moving direction of the punch holder, the second stripper plate is moved at substantially the same timing without being delayed by the movement of the first stripper plate. And the bending of the workpiece during processing can be suppressed.

(3) In the progressive die according to the present invention, in the above (1) or (2), the second punch plate is used when the workpiece is processed by the first drawing punch.
It moves relative to the punch holder in the moving direction of the punch holder against the urging force of the second elastic member.

In the present invention, when the workpiece is processed by the first drawing punch, the second punch plate resists the urging force of the second elastic material against the punch holder. Since the workpiece relatively moves in the moving direction, unnecessary stress is not applied to the workpiece after the second drawing, which has already been processed, and the deformation of the workpiece can be suppressed, so that highly accurate processing can be realized.

(4) The progressive die according to the present invention comprises a punch holder, a die holder provided opposite to the punch holder, and first and second holders mounted on the punch holder.
A punch backing plate, a first punch plate mounted on the first punch backing plate and having a first drawing punch, and a first support pin protruding toward the die holder by a first elastic material provided on the punch holder. In a progressive die having a supported first stripper plate, a second elastic member provided on a punch holder, a second support pin protruding toward the die holder by the second elastic member, and a second support pin A second punch plate supported by the punch backing plate with a gap in the direction of the punch holder and having a punch for the second drawing and thereafter, and a third elastic member provided on the die holder and having a smaller elasticity than the second elastic member And a second strike supported by a third support pin projecting toward the punch holder by the third elastic material and disposed on the workpiece at the feed line height. When the surface of the first stripper plate facing the die holder reaches substantially the same height as the surface of the second stripper plate facing the die holder by moving the punch holder to the die holder side, The punch plate was kept in contact with the second stripper plate while maintaining the gap between the punch plate and the second punch backing plate.

According to the present invention, when the first stripper plate reaches almost the same height as the second stripper plate due to the lowering of the punch holder, the second punch plate maintains the gap between the second punch backing plate. Therefore, even if the punch holder further descends, the first stripper plate and the second stripper plate descend at the same timing, and moreover, the second stripper plate is pushed up. Since the elasticity of the third elastic material is smaller than the elasticity of the second elastic material, the workpiece at the feed line height can be lowered to the die holder side while being kept substantially horizontal.

(5) In the progressive die according to the present invention, in the above (4), the second elastic member is formed by the second support pin when the workpiece is processed by the second or subsequent drawing punch. It has elasticity against the pressing force.

In the present invention, the second elastic member provided on the punch holder has an elasticity against a pressing force from the second support pin generated when the workpiece is processed by the second or subsequent drawing punch. , The second stripper plate descending from the feed line height descends at substantially the same timing without delaying the descending of the first stripper plate.

(6) In the progressive die according to the present invention, in (4) or (5), the elasticity of the third elastic material is set to be 1/10 or less of the elasticity of the second elastic material.

In the present invention, since the elasticity of the third elastic member is not more than 1/10 of the elasticity of the second elastic member, the descending of the second stripper plate and the first stripper plate descending from the height of the feed line are the same. It can be lowered at the timing, and can be lowered to the die holder side while keeping the workpiece substantially horizontal.

(7) In the progressive die according to the present invention, in the above (4) or (5), the elasticity of the third elastic member is the second elastic member.
It is a degree that supports the weight of the stripper plate and the third support pin.

In the present invention, the elasticity of the third elastic member is
Since the second stripper plate and the third support pin only support the weight, the lowering timing from the feed line height of the first stripper plate and the second stripper plate becomes the same, and the workpiece is kept substantially horizontal. It can be lowered to the die holder side as it is.

[0032]

FIG. 1 is an explanatory view showing a schematic configuration of a progressive die according to an embodiment of the present invention. The progressive die according to the present embodiment has a lower movable stripper structure as in the conventional example described above, and is divided into a first block for a first drawing step and a second block for a subsequent drawing step. ing.

In the drawing, reference numeral 100 denotes a punch holder shared by the first block and the second block, and 111 denotes a first punch backing plate on the first block side, which is attached to the lower surface of the punch holder 100. 112 is a first punch plate attached to the lower surface of the first punch backing plate 111, and 113 is a punch guide hole 11
A first coil spring (first elastic material) 1 provided on the punch holder 100 with a first stripper plate having
15 which are urged downward by the elasticity of 15 and project respectively
Punch holder 100 by the first support pin 114 of the book.
It is movably supported with respect to.

The first stripper plate 113 described above
For example, the workpiece 1 is placed on a first die plate 212 described later.
It is formed in an inverted U-shape so that when the 0 is pressed, both ends in the longitudinal direction contact the first die plate 212. Reference numeral 116 denotes a first drawing punch attached to the first punch plate 112, and the first stripper plate 11
3 is inserted into the punch guide hole 113a.

Reference numeral 121 denotes a second punch backing plate on the second block side, which is attached to the lower surface of the punch holder 100. Reference numeral 122 denotes a second punch plate disposed with a gap below the second punch backing plate 121, and a second punch plate provided on the punch holder 100.
It is movably supported with respect to the punch holder 100 by four second support pins 124 which are urged downward by the elastic force of a coil spring (second elastic material) 125 and protrude therefrom. Reference numeral 123 denotes, for example, five punches attached to the second punch plate 122 at a predetermined pitch. A punch adjacent to the above-described first drawing punch 116 is used for the second drawing, and the longest punch is used for the sixth drawing. Are arranged in order.

Reference numeral 200 denotes a die holder shared by the first block and the second block, which is provided below and opposite to the punch holder 100 described above. Reference numeral 211 denotes a first die backing plate on the first block side.
0. Reference numeral 212 denotes a first die backing plate attached to the upper surface of the first die backing plate 211.
It is a die plate.

Reference numeral 221 denotes a second die backing plate on the second block side, which is attached to the upper surface of the die holder 200. 222 is a second die plate attached to the upper surface of the second die backing plate 221;
Reference numeral 3 denotes a second stripper plate disposed on the upper surface side of the workpiece 10 set at the feed line height, and a punch guide hole 223a corresponding to each punch 123 is provided. 3 coil spring (third elastic material)
The die holder 200 is urged upward by the resilience of the second holder 225 and is projected by the four third support pins 224.
It is movably supported with respect to. The second stripper plate 223 is formed in an inverted U-shape so that both ends in the longitudinal direction contact the second die plate 222, for example, like the first stripper plate 113 on the first block side.

The elasticity of the third coil spring 225 is as follows.
For example, the punch holder 10 is pressed with a force enough to support the weight of the second stripper plate 223 and the third support pin 224.
0/10 of the elasticity of the second coil spring 125 provided at
It is about. The second coil spring 125 is used when the workpiece 10 is processed by the second drawing punch 123 attached to the second punch plate 122.
It has elasticity against the pressing force from the support pin 124. That is, the second coil spring 125 is used when the workpiece 10 is processed by the punch 123 for the second and subsequent drawing.
The second punch plate 122 has a biasing force that does not move relative to the punch holder 100.

Next, the operation of the progressive die according to the embodiment configured as described above will be described with reference to FIG. FIG. 2 is an explanatory diagram showing the operation of the progressive die according to the embodiment. When the punch ram (not shown) descends from the top dead center and the punch holder 100 starts to descend, the lower surface of the first stripper plate 113 on the first block side of the punch holder 100 as shown in FIG. In contact with the workpiece 10 installed at the second position, the height becomes substantially the same as the lower surface of the second stripper plate 223 on the second block side, and the punches 123 on the second block side are arranged in descending order of the punch length. From the punch guide hole 2 of the second stripper plate 223
While entering the drawn product of the workpiece 10 through 23a, the second punch plate 122 fixing the respective punches 123 contacts the second stripper plate 223. At this time, the interval between the second punch backing plate 121 and the second punch plate 122 on the second block side is almost the same as before the punch holder 100 is lowered.

When the punch holder 100 is further lowered from the above-described state, the first stripper plate 113 on the first block side moves the workpiece 10 set at the feed line height as shown in FIG. Almost at the same time as pushing down,
The second stripper plate 223 on the side of the second block descends against the elasticity of the third coil spring 225 and pushes down the workpiece 10 so that the workpiece 10 is in the first and second positions.
It contacts the die plates 212 and 222, respectively. At this time, the first and second workpieces 10 are maintained while the workpiece 10 is kept substantially horizontal.
Each of the drawn products of the workpiece 10 is drawn by the punches 123 mounted on the die plates 212 and 222 and fixed to the second punch plate 122 on the second block side.

When the press ram further descends and reaches the bottom dead center, the first coil spring 115 on the first block side is moved to the first support pin 1 as shown in FIG.
14, and the second coil springs 125 of the punch holder 100 on the second block side are contracted by the respective second support pins 124. At this time, the punch 116 on the first block side presses the workpiece 10 to process the first drawn product, and the second punch backing plate 121 on the second block side contacts the second punch plate 122. That is, when the workpiece 10 is processed by the first drawing punch 116, the second punch plate 122 resists the urging force of the second coil spring 125.
Move relative to.

Thereafter, although not shown, the press ram rises from bottom dead center to top dead center and the punch holder 100
Is pulled up to a predetermined position. When the punch holder 100 is pulled up to a predetermined position, the first coil spring 115 on the first block side returns while pressing the first stripper plate 113 via the first support pin 114, and
The second coil spring 125 on the second block side returns while pressing the second punch plate 122 via the second support pin 124. At this time, the punch 116 on the first block side is removed from the first drawn product, and the second punch backing plate 121 on the second block side is removed from the second punch plate 122.
Move away from

As the punch holder 100 rises, the first
The first stripper plate 113 on the block side is raised, and the second punch plate 1 on the second block side is lifted.
22 is raised. At this time, the third coil spring 225 on the side of the die holder 200 pushes up the second stripper plate 223 via the third support pin 224, and the workpiece 1
0 goes up to the feed line height.

Then, the first stripper plate 113 on the first block side moves away from the workpiece 10 and the second
The second punch plate 122 on the block side is separated from the second stripper plate 223. At this time, the punches 123 on the second block side move upward together with the second punch plate 122 and come out of the respective punch guide holes 223a provided in the stripper plate 223.

As described above, in the present embodiment, when the lower surface of the first stripper plate 113 reaches the same height as the lower surface of the second stripper plate 223 due to the lowering of the punch holder 100, the second punch plate 122 Since the gap between the second punch backing plate 121 and the second stripper plate 223 is maintained, even if the punch holder 100 is further lowered, the first stripper plate 113 and the second stripper plate 223 are maintained. Falls at about the same time, and
Since the elasticity of the third coil spring 225 pushing up the second stripper plate 223 is smaller than the elasticity of the second coil spring 125 by 1/10, the workpiece 10 having the feed line height is used.
The first and second die plates 21 are kept substantially horizontal.
2, 222, it is possible to process a drawn product with high accuracy.

Also, in the present embodiment, the first stripper plate 11
When the workpiece 3 is brought into contact with the workpiece 10 and pushes the workpiece 10 down from the feed line height, the second punch plate 122
By pressing the stripper plate 223, the second stripper plate 223 is pressed against the urging force of the third coil spring 225.
The workpiece 1 at the feed line height
0 can be lowered while being kept substantially horizontal, and the bending of the workpiece 10 can be suppressed.

Further, the second coil spring 125 has an urging force that does not cause the second punch plate 122 to relatively move with respect to the punch holder 100 when the workpiece 10 is processed by the punch 123 for the second drawing and thereafter. As a result, the second stripper plate 223 can be moved at substantially the same timing without delaying the movement of the first stripper plate 113, and the bending of the workpiece 10 during processing can be suppressed.

Further, the second punch plate 122
Moves relative to the punch holder 100 against the biasing force of the second coil spring 125 when the workpiece 10 is processed by the first drawing punch 116. Unnecessary stress is not applied to the workpiece 10 after the drawing, so that deformation of the workpiece 10 can be suppressed, and highly accurate processing can be realized.

In the present embodiment, the punch holder 100 and the first and second punch backing plates 111 and 121 are formed separately from each other.
The punch holder 100 and the first punch backing plate 111, or the punch holder 100 and the second punch backing plate 121, or the punch holder 100 and the first
In addition, the punch holder may be formed by integrally forming the second punch backing plates 111 and 121, and the same effect as described above can be obtained.

In the present embodiment, the die holder 200 and the first and second die backing plates 2 are provided.
11 and 221 are configured separately, but the die holder 200 and the first die backing plate 211,
Alternatively, the die holder may be formed by integrally forming the die holder 200 and the second die backing plate 221 or the die holder 200 and the first and second die backing plates 211 and 221.

[0051]

As described above, according to the present invention, when the first stripper plate reaches substantially the same height as the second stripper plate due to the lowering of the punch holder, the second punch plate is brought into contact with the second punch backing plate. Is maintained so as to contact the second stripper plate, so that even if the punch holder is further lowered, the first stripper plate and the second stripper plate are lowered at substantially the same timing. (2) Since the elasticity of the third elastic material pushing up the stripper plate is smaller than the elasticity of the second elastic material, the workpiece at the feed line height can be lowered to the die holder side while keeping the workpiece substantially horizontal. Therefore, there is an effect that an accurate drawn product can be processed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of a progressive die according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an operation of a progressive die according to the embodiment.

FIG. 3 is an explanatory view showing a schematic configuration of a conventional progressive die.

FIG. 4 is an explanatory view showing the operation of a conventional progressive die.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 punch holder 112 first punch plate 113 first stripper plate 114 first support pin 115 first coil spring 116 first aperture punch 122 second punch plate 123 second aperture subsequent punch 124 second support pin 125 second Coil spring 200 Die holder 212 First die plate 222 Second die plate 223 Second stripper plate 224 Third support pin 225 Third coil spring

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Sonozu 3-3-5 Yamato, Suwa City, Nagano Prefecture Inside Seiko Epson Corporation (72) Tomo Takahashi 3-3-5 Yamato Suwa City, Nagano Prefecture Seiko Epson Co., Ltd. F-term (reference) 4E090 AA01 AB01 EC04 FA02 HA03

Claims (7)

[Claims] 1. A punch holder, a die holder provided to face the punch holder, a first punch plate mounted on the punch holder and having a first drawing punch, and provided on the punch holder. A first elastic material, a first stripper plate movably held by the punch holder and urged toward the die holder by the first elastic material, and a second elastic material provided on the punch holder. A second punch plate having a punch for the second and subsequent squeezes, movably held by the punch holder, and urged toward the die holder by the second elastic material; and a second punch plate provided on the die holder. A third elastic member, movably held by the die holder, and urged toward the punch holder by the third elastic member to form a workpiece having a feed line height. A second stripper plate disposed at a corresponding feed line position, and the first stripper plate abuts on the workpiece by moving the punch holder toward the die holder, and feeds the workpiece through the feed line. The second punch plate presses the second stripper plate to move the second stripper plate against the urging force of the third elastic member when the second stripper plate is moved from the height toward the die holder. Characterized in that the die is moved to the die holder side. 2. The method according to claim 1, wherein the second elastic material is provided with the second elastic material when the workpiece is processed by the second or subsequent drawing punch.
2. The progressive die according to claim 1, wherein the punch plate has a biasing force that does not move relative to the punch holder in a moving direction of the punch holder. 3. The punch plate according to claim 1, wherein the second punch plate is configured to hold the punch with respect to the punch holder against a biasing force of the second elastic material when the workpiece is processed by the first drawing punch. The progressive die according to claim 1, wherein the die is relatively moved in a moving direction of the holder. 4. A punch holder, a die holder provided opposite to the punch holder, first and second punch backing plates mounted on the punch holder, mounted on the first punch backing plate, A progressive feeder having a first punch plate having a first drawing punch, and a first stripper plate supported by a first support pin protruding toward the die holder by a first elastic material provided on the punch holder. A second elastic member provided on the punch holder; and a second elastic member protruding toward the die holder by the second elastic member.
A support pin, supported by the second support pin with a gap in the direction of the second punch backing plate and the punch holder;
A second punch plate having a punch after drawing, a third elastic material provided on the die holder, the elasticity being smaller than the second elastic material, and a third elastic material protruding toward the punch holder by the third elastic material. (3) a second stripper plate supported on a support pin and disposed on a workpiece having a feed line height, and the punch holder is moved to the die holder side to move the first stripper plate to the die holder. When the facing surface reaches substantially the same height as the surface of the second stripper plate facing the die holder, the second punch plate maintains the gap between the second puncher plate and the second punch backing plate. A progressive die having a contact with a second stripper plate. 5. The second elastic material according to claim 2, wherein the second elastic material is formed by a second punch after the second drawing.
5. The progressive die according to claim 4, wherein the die has an elasticity against a pressing force from the support pin. 6. The elasticity of the third elastic material is set to be 1/10 or less of the elasticity of the second elastic material.
Or the progressive die according to 5. 7. The progressive die according to claim 4, wherein the elasticity of the third elastic member is such that it supports the weight of the second stripper plate and the third support pin.