JPH09103829A - Punching die, die centering device and simultaneously working method of stripper plate and die in punching die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily attach a punch body against a punch guide, to easily execute centering of the punching die and a metallic die and especially to precisely hold the same concentricity of the stripper plate and the die by making the clearance of the punch guide against the punch supporting member into zero. SOLUTION: An up and down movable punch guide 15 against a guide bush guide 13 attached on an upper turret 3 is installed movable up and down in a state of the clearance being made in zero. Then, a punching die composed by engaging an engaging part 23K formed at a punch tip 23 into an engaging groove 21 formed on a punch body 19, a centering device composed by forming centering holes 49, 51, 53 for attaching centering pin 55 in a position corresponding to each of the punch guide 13, a stripper plate 25 and a die 11, further the stripper plate 23 and the die 11 are simultaneously worked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching die for punching a work, a centering device for the die, and a method for simultaneously working a stripper plate and a die in the punching die.

[0002]

2. Description of the Related Art Conventionally, a punching die and a die as a punching die are mounted and used on a punch supporting member and a die supporting member in a punching machine, respectively.
In addition, the punch die includes a vertically movable punch guide mounted on a punch support member and a vertically movable punch body mounted on the punch guide and having a punch tip at a tip. Therefore, a punch support member,
It has a triple structure of a punch guide and a punch body, and each part is provided with a clearance for sliding. Moreover, the punch tip is accurately attached to the punch body.

An operator adjusts the centering of the punch die and the die die each time. Furthermore, the stripper plate and die die are processed separately.

[0004]

By the way, in the punch die of the conventional punching die described above, the punch guide for the punch support member and the punch body having the tip of the punch tip for the punch guide slide in order to slide. Since the clearance is provided, the cumulative error and the clearance become large, and the die die having the extremely small die clearance cannot be used.

Even if the centering of the punch die and the die die is adjusted accurately each time, since there is a clearance in each part, the work is carried out in a misaligned state, and burrs are likely to occur. There is a problem. Further, since the stripper plate and the die die are separately processed, it is very troublesome to adjust the centering of the cutting edge.

An object of the present invention is to make the clearance of the punch guide with respect to the punch support member zero, thereby facilitating the attachment of the punch body to the punch guide and the centering of the punch die and the die die. In particular, to provide a punching die and an apparatus for centering the die so as to maintain the concentricity of the stripper plate and the die with high precision, and a simultaneous processing method of the stripper plate and the die in the punching die. is there.

[0007]

In order to achieve the above object, the punching die of the present invention according to claim 1 is provided so that a punch guide can be moved up and down with respect to a punch support member with zero clearance. An engaging portion formed on a punch tip is engaged with an engaging groove formed on a punch body that is vertically movable in the punch guide.

In the above structure, since the punch guide is provided so as to be movable up and down with respect to the punch support member with the clearance being zero, the punch body can be roughly attached to the punch guide. Is easily done. Further, the engaging portion formed on the punch tip is easily engaged with the engaging groove formed on the punch body, and the punch tip is centered and positioned by the stripper plate provided at the tip of the punch guide. It

According to a second aspect of the punching die of the present invention, in the punching die of the first aspect, the engaging groove is a T-shaped groove.

In the above structure, the engaging groove is a T-shaped groove, so that the engaging portion of the punch tip is more easily engaged with the T-shaped groove.

According to a third aspect of the punching die of the present invention, in the punching die of the first aspect, a rotating body retainer is interposed between the punch support member and the punch guide as means for making the clearance zero. It is characterized by

In the above structure, the rotary retainer is interposed between the punch support member and the punch guide, so that the punch guide is smoothly moved up and down with respect to the punch support member with zero clearance. .

According to a fourth aspect of the punching die of the present invention, in the punching die of the first aspect, the clearance between the stripper plate fixed to the punch body and the punch tip serves as a highly accurate guide. It is a feature.

In the above structure, since the clearance between the stripper plate and the punch tip is used as a highly accurate guide, the punch tip is moved up and down with respect to the stripper plate with zero clearance. The error is suppressed as much as possible.

According to a fifth aspect of the present invention, there is provided a punching die centering device for centering in which centering pins are attached to positions corresponding to the punch guide, the stripper plate and the die of the punching die. It is characterized by forming holes.

With the above arrangement, the die is fixed with the centering pins attached to the centering holes formed at the corresponding positions of the punch guide, the stripper plate and the die of the punching die of claim 1. Then, after removing the centering pin from the die, the stripper plate is fixed to the punch guide. Then, the punching die and the die die are easily centered by removing the centering pin.

According to a sixth aspect of the present invention, there is provided a method for simultaneously processing a stripper plate and a die in a punching die, wherein the stripper plate and the die in the punching die are fixed by a jig, and a blade hole is formed in the stripper plate and the die. After simultaneously processing the centering holes, the stripper plate is removed, and the cutting edge holes formed in the die are processed to be larger by the clearance.

In the above structure, the stripper plate and the die are fixed with a jig. In that state, the stripper plate and the die are simultaneously processed to have a cutting edge hole and a centering hole. Then, the stripper plate is removed from the die, and the cutting edge hole formed in the die is machined by a clearance. Thus, the concentricity between the punch die and the die die can be maintained with high accuracy.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, a turret punch press 1 as a punching machine includes a rotatable punch support member and an upper turret 3 as a die support member.
A lower turret 5 is provided facing each other, and a punch mold 7 and a die mold 9 are mounted on the upper turret 3 and the lower turret 5 facing each other. Die mold 9
The die 11 is mounted in a mounting hole 5H formed in the lower turret 5. A die chip 11C is integrated on the die 11.

Mounting hole 3 formed in the upper turret 3
A punch guide bush 13 is attached to H. The punch guide bush 13 may be integrated with the upper turret 3. The inner peripheral surface of the punch guide bush 13 has a polygonal cross section as well as FIG. 2, and the outer peripheral surface of the punch guide 15 mounted in the punch guide bush 13 also has a polygonal cross section. .

A plurality of rollers 17 as rotary body retainers are fitted in the circumference between the punch guide bush 13 and the punch guide 15 at appropriate intervals so as to be vertically rollable. Therefore, the punch guide 1
5 is in line contact with the roller 17, and the punch guide 15
The slide surface has zero clearance. A ball may be used instead of the roller 17.

A punch body 19 is mounted in the punch guide 15 as shown in FIG. The punch body 19 has, for example, a T-shaped groove 21 as an engaging groove.
The punch tip 23 is engaged with and held by the T-shaped groove 21. That is, the engaging portion 23 of the punch tip 23 is attached to the T-shaped portion 21T of the T-shaped groove 21.
K is fitted and engaged.

As well shown in FIG. 3, when the diameter D ₁ of the punch tip 23, the engaging width H ₁ , the diameter D ₂ of the punch body 19 and the groove width H ₂ are set, D ₂ −D ₁ = a, H ₂
-H ₁ = b, it is preferable that a and b have a clearance of 0.02 to 1.02 mm.

A stripper plate 25 is attached to the lower surface of the punch guide 15 with a plurality of bolts 27. A hole 29 is formed at substantially the center of the stripper plate 25 so that the tip of the punch tip 23 can be moved up and down. The clearance between the hole 29 and the punch tip 23 is used as a highly accurate guide to make the clearance zero.

A retainer 31 is provided above the punch guide 15. A spring seat 33 is provided on the retainer 31, a stripping spring 35 is placed on the spring seat 33, and a punch head 37 is placed on the upper part of the spring seat 33. The punch head 37 is attached to the punch body 19 with a bolt 39. ing. The stripping spring 35 may be an elastic member such as urethane rubber other than the spring.

A plurality of through bolts 41 are attached to the upper turret 3, and a pressing member 45 for urging the lifter spring 43 upward is attached to each of the through bolts 41. An upper surface of the pressing member 45. Is in contact with the lower surface of the retainer 31. The punch head 3
A striker 47 that can move up and down is provided above 7.

With the above structure, when the striker 47 is lowered, it comes into contact with the punch head 37, and when it is further lowered, the punch guide 15 pushes the lifter spring 43 and the punch guide 15 with respect to the punch guide bush 13 and the roller 1.
It slides downward with 7 together with the stripping spring 35. Stripper plate 25 is die 11
Although the work W placed on the top is contacted and stopped, when the striker 47 is further lowered, the stripping spring 3
5 bends, punch tip 23 is stripper plate 25
Die 1 punching out the work W coming out from the hole 29 of
Go into 1.

At this time, since the slide portions of the punch guide 15 and the punch guide bush 13 are in a state in which the roller 17 is preloaded (preloaded), the clearance becomes zero and the clearance between the punch tip 23 and the die 11 is made small. You can At this time, the punch chip 23 and the T-shaped groove 21 formed in the punch body 19 are engaged with the punch body 19 so that the punch body 19 can be easily assembled and the replacement can be performed easily and easily. Since the punch body 19 is roughly attached to the punch guide 15, it can be easily attached. Also,
Since the clearance between the hole 29 and the punch tip 23 is a highly accurate guide, the cumulative error can be suppressed as much as possible.

When the stripper plate 25 attached to the lower surface of the punch guide 13 and the die 11 are centered, as shown in FIG.
5. A plurality of centering holes 49, 51, 53 as centering devices are formed in the vertical direction at positions corresponding to the stripper plate 25 and the die 11, respectively.

With the above structure, first, the centering pin 55 is fitted in the centering holes 49 and 51 formed in the punch guide 13 and the stripper plate 25, for example. Then, the centering pin 55 is mounted in alignment with the centering hole 53 formed in the die 11. In this state, the die 11 is fixed by the lower turret 5 with the set screw 57, for example.

After that, the centering pin 55 is pulled out from the centering hole 53 formed in the die 11, and the stripper plate 25 is attached to the punch guide 13 with a plurality of bolts as shown in FIG. After fixing with 27, by pulling out the centering pin 55 from the centering holes 49 and 51 formed in the punch guide 13 and the stripper plate 25,
The stripper plate 25 and the die 11 can be easily and easily centered.

Next, a method of simultaneously processing the stripper plate 25 and the die 11 in the punching die will be described. As shown in FIGS. 5A and 5B, for example, the die chip 11C is placed on the jig 59. And stripper plate 25 are placed on top of each other and fixed with bolts 61. Then, for example, by wire cutting, the stripper plate 25
Hole 29 and the cutting edge hole 11H of the die chip 11C corresponding to the hole 29 are processed at the same time, and the centering hole 51,
Process 53 at the same time.

After removing only the stripper plate 25, the die chip 11 is removed as shown in FIG.
A large amount of clearance C is machined in the blade edge hole 11H of C.

Therefore, by using the centering holes 51 and 53 that are simultaneously processed, the stripper plate 25 and the die 11 can be easily centered.
Concentricity between the punch die 7 and the die die 9 can be maintained with high accuracy.

The present invention is not limited to the examples of the above-described embodiment, but can be implemented in other modes by making appropriate changes.

[0037]

As can be understood from the examples of the embodiments described above, according to the invention of claim 1, the punch guide is provided so as to be movable up and down with respect to the punch support member with the clearance being zero. Therefore, the engaging portion formed on the punch tip can be easily engaged with the engaging groove formed on the punch body, and the punch body can be roughly attached to the punch guide. Therefore, the mounting can be easily performed. Further, the punch tip can be centered and positioned on a stripper plate provided at the tip of the punch guide.

According to the second aspect of the present invention, since the engaging groove is a T-shaped groove, the engaging portion of the punch tip can be more easily engaged with the T-shaped groove.

According to the third aspect of the present invention, the rotary retainer is interposed between the punch support member and the punch guide, so that the punch guide can be smoothly moved to the punch support member with zero clearance. Can be moved up and down.

According to the fourth aspect of the invention, since the clearance between the stripper plate and the punch tip is a highly accurate guide, the punch tip can be moved up and down with respect to the stripper plate with zero clearance. Therefore, the cumulative error can be suppressed as much as possible.

According to the invention of claim 5, the centering pins are attached to the centering holes formed at the corresponding positions of the punch guide, the stripper plate and the die of the punching die according to the first aspect. The die is fixed in this state, the centering pin is removed from the die, and then the stripper plate is fixed to the punch guide. Then, the centering of the punch die and the die die can be easily performed by removing the centering pin.

According to the invention of claim 6, the stripper plate and the die are fixed by a jig. In that state, the stripper plate and the die are simultaneously processed to have a cutting edge hole and a centering hole. Then, the stripper plate is removed from the die, and the cutting edge hole formed in the die is machined by a clearance. Thus, the concentricity between the punch die and the die die can be maintained with high accuracy.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a punching die mounted on a turret punch press according to an embodiment of the present invention.

FIG. 2 is an arrow view along the line II-II in FIG.

FIG. 3 is a perspective view of assembling a punch chip on a punch body.

FIG. 4 is an explanatory diagram for centering a stripper plate and a die in a punching die.

5A is a front view for explaining simultaneous processing of a stripper plate and a die chip, and FIG. 5B is a plan view of FIG.

FIG. 6 is an operation explanatory view for simultaneously processing a stripper plate and a die chip.

[Explanation of symbols]

 1 Turret Punch Press (Punching Machine) 3 Upper Turret (Punch Support Member) 5 Lower Turret (Die Support Member) 7 Punch Die 9 Die Die 11 Die 11C Die Tip 13 Punch Guide Bushing 15 Punch Guide 17 Roller 19 Punch Body 21 T V-shaped groove 23 Punch tip 25 Stripper plate 49, 51, 53 Centering hole (centering device) 55 Centering pin 57 Set screw

Claims (6)

[Claims] 1. A punch guide is provided to a punch support member so as to be vertically movable with zero clearance, and a punch chip is provided in an engagement groove formed in a punch body provided to the punch guide so as to be vertically movable. A punching die, characterized in that the engaging portion formed on the is engaged. 2. The punching die according to claim 1, wherein the engaging groove is a T-shaped groove. 3. A rotary body retainer is interposed between the punch support member and the punch guide as a means for reducing the clearance to zero.
Punching die described. 4. The punching die according to claim 1, wherein a clearance between the stripper plate fixed to the punch body and the punch tip serves as a highly accurate guide. 5. The punching die according to claim 1, wherein a centering hole for attaching a centering pin is formed at a position corresponding to each of the punch guide, the stripper plate and the die of the punching die. Centering device. 6. The punching die and the die in the punching die are fixed to each other with a jig, and after the punching hole and the centering hole are simultaneously formed in the stripper plate and the die,
A method for simultaneously processing a stripper plate and a die in a punching die, characterized in that a stripper plate is removed and a cutting edge hole formed in a die is enlarged by a clearance amount.