JPH08267157A - Punching die - Google Patents

Abstract

PURPOSE: To prevent the cross-section of a lap part product from being deteriorated at the time of blanking and to prevent the occurrence of whiskers on slugs at the same time by increasing the parallelism of a punch tip to a key on a die supporting member side in a punch press than heretofore. CONSTITUTION: A die supporting member Tu in a punch press is attached directly with a punch holder 5 and is moved up and down. Further, a punch tip 13 is attached to the punch holder 5 individually or as one body. Therefore, since the parallelism of the punch tip 13 to the die supporting member Tu is increased than heretofore, the cross-section of the lap part product is prevented from being deteriorated at the time of blanking, and further the occurrence of whiskers on the slugs is prevented.

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 in cooperation with a die die.

[0002]

2. Description of the Related Art The upper and lower turrets T _U and T _{D of a} conventional punch press such as a turret punch press.
As shown in FIG. 4, each punch die 1
01 and die die 103 are mounted. Punch mold 1
As 01, the punch guide 10 is attached to the upper turret T _U.
The punch guide 105 is provided with a key groove 107 extending vertically. In the key groove 107, the upper turret T
_The key 109 provided on the _U is engaged.

On the punch guide 105, a punch body 113 having a punch chip 111 at the bottom is mounted so as to be vertically movable. A punch driver 115 is fixed to the upper portion of the punch body 113 with bolts 117, and a plurality of bolts 1 are attached to the lower surface of the punch driver 115.
The key 121 is fixed at 19. The key 121 is engaged with a key groove 107 formed in the punch guide 105.

A stripper plate 123 is provided below the punch guide 105, and the punch chip 1 is provided at the center of the stripper plate 123.
A through hole 125 is formed in which 11 is moved up and down. On the other hand, the upper flange portion 105F of the punch guide 105
And a plurality of bolts 12 on the upper surface of the punch driver 115.
A stripper spring 131 is urged upward and interposed between the punch head 129 fixed at 7.

Upper flange 1 of the punch guide 105
A plurality of pins 133 are mounted on the outer peripheral portion of 05F at appropriate intervals, and the lower surface of each pin 133 is lifter spring 137 wound around a through bolt 135 provided on the upper surface of the upper turret T _U. The circular pressing plate 139 is abutted by the urging force of.

A die hole 1 vertically penetrating the die mold 103 attached to the lower turret T _D is formed substantially at the center thereof.
41 is formed, and the die hole 141 communicates with the hole T _H formed in the lower turret T _D.

With the above structure, when the punch head 129 is struck by a striker (not shown) with the work W to be machined placed on the die die 103, the punching die resists the biasing force of the lifter spring 137. The punch guide 105 of 101 moves down and the work W is pressed by the stripper plate 123.

Further, a punch head 129 is used with a striker.
If the punch body 113 descends via the punch driver 115 against the biasing force of the stripper spring 131, the punch chip 111 and the die die 103 cooperate with each other to punch the workpiece W. Will be done.

[0009]

By the way, in the above-described conventional punching die 101, referring also to FIG. 5, the key groove 107 formed in the punch guide 105 is described.
Positioning is performed by two keys, a key 109 provided on the upper turret T _U and a key 121 attached to the punch body 113. Therefore, the punch body 11
There is a problem that an assembling accuracy error (δ degree in FIG. 5) of the punch tip 111 occurs at the time of assembling No. 3, and the punch tip 111 is not parallel to the key 109.

Therefore, when the work W is punched, the error with respect to the machine movement axis is large. For example, as shown in FIG. 6A, when the work W is punched, the lapping portion at the time of punching is performed. Deterioration of product cross section and Fig. 6
As shown in (B), there is a problem that a beard is generated on the scrap.

The object of the present invention is to improve the parallelism of the punch tip with respect to the key on the die supporting member side in the punch press to improve the cross section of the lap product at the time of overtaking, and to cause a beard on the punch residue. It is to provide a punching die for preventing the above.

[0012]

In order to achieve the above object, the punching die of the invention according to claim 1 has a punch chip on the lower surface of a punch holder which is directly attached to a die supporting member in a punch press so as to be vertically movable. And a punch head is provided above the punch holder, a stripper plate is provided below a guide post movably supported by the punch holder, and a retainer is provided above the guide post. The retainer and the punch head are provided. It is characterized in that an elastic member for strip is elastically mounted between and.

The punching die of the invention according to claim 2 is
The punch holder and the punch chip are integrated.

[0014]

With the punching die of the invention according to claim 1 as described above, when the punch head is struck by the striker with the work to be machined placed on the die die, the die is lowered. Press the work with the stripper plate. When the punch head is further lowered, the punch holder is lowered against the urging force of the strip elastic member, and the work is punched by the cooperation of the punch chip and the die die.

A punch holder is directly attached to a die supporting member in the punch press and moved up and down. A punch chip is separately attached to or integrated with the punch holder. Therefore, since the parallelism of the punch tip with respect to the die supporting member is increased as compared with the conventional one, deterioration of the lap product cross section at the time of overtaking is eliminated,
Also, the beard is prevented from being generated on the scraps.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment will be described below in detail with reference to the drawings.

Referring to FIGS. 1 and 2, mounting holes T _{H of} upper and lower turret T _U , T _D which are die supporting members in a turret punch press as a punch press, for example.
A punching die 1 and a die die 3 are mounted on each of them. The punching die 1, keyway 7 is formed is stretched in the vertical direction in the punch holder 5 together with the vertically movable punch holder 5 is mounted on the mounting hole T _H of the upper turret T _U ing. A key 9 provided on the upper turret T _U is engaged with the key groove 7.

With the above structure, the punch holder 5 having the key groove 7 engaged with the key 9 is moved up and down with respect to the upper turret T _U.

A positioning pin 11 is mounted downward at a substantially central portion of the lower surface of the punch holder 5, and the positioning pin 11 has a positioning hole provided at a substantially central portion of the upper surface of the punch tip 13. 15 is engaged, and the punch chip 1 is attached to the lower surface of the punch holder 5.
3 is fixed by a plurality of bolts 17. The side surface of the punch tip 13 is pressed against the punch holder 5 with a screw 18.

A punch driver 19 is attached to the central portion of the upper portion of the punch holder 5 with a bolt 21. Moreover, a punch head 25 is attached to the upper surface of the punch driver 19 with a plurality of bolts 23. A plurality of vertically extending guide posts 27 are mounted on the punch holder 5, and a stripper plate 31 is provided on the lower surface of the guide posts 27 via a circular plate 29.
Are attached with a plurality of bolts 33. The circular plate 29 and the strip plate 31 are the positioning pins 3
It is positioned by 5 and is attached by a plurality of bolts 37. The outer peripheral surface of the punch holder 7 and the bolt 21
An oil passage 38 for supplying lubricating oil is formed therein.

A retainer 39 is attached to the upper surface of the guide post 27 with a plurality of bolts 41. A plurality of pins 43 are attached to the outer peripheral portion of the retainer 39 at appropriate intervals, and the lower surface of each pin 43 is a lifter wound around a through bolt 45 provided on the upper surface of the upper turret T _U. A circular pressing plate 49 is abutted by the biasing force of the spring 47. A stripper spring 51 wound around the punch body 19 is interposed between the retainer 39 and the punch head 25.
Always urged upward.

A die hole 53 penetrating in the vertical direction is formed in substantially the center of the die die 3 attached to the lower turret T _D , and the die hole 53 is formed in the lower turret T _D.
It communicates with the hole 55 formed in _D.

With the above structure, when the punch head 25 is hit with a striker (not shown) with the work W to be processed placed on the die die 3, the lifter spring 4
The punching die 1 descends against the urging force of 7 to press the work W with the strip plate 31.

When the punch head 25 is continuously hit with the striker, the punch holder 5 is guided by the guide post 27 via the punch body 19 against the biasing force of the stripper spring 51 as an elastic member for the stripper. When the work W is lowered, the work W is punched by the cooperation of the punch tip 13 and the die die 3. At this time, the body of the punch tip 13 is inserted into the hole 29H formed in the circular plate 29 to avoid interference.

Therefore, in the structure of this embodiment described above, only the key groove 7 and the key 9 are engaged, and the conventional key 121 and the key groove 107 shown in FIG. 4 are engaged. Since the number of parts constituting the parallelism is reduced, the error with respect to the machine movement axis can be suppressed to a minimum. In addition, since the stripping force (plate pressing force and pulling force) is generated at the upper part of the retainer 39 (stripper spring 51) and is transmitted to the stripper plate 31 via the guide post 27, the same stripper force as the conventional one is used. Can be maintained.

Since the parallelism of the punch tip 13 with respect to the key 9 on the upper turret T _U side is increased as compared with the conventional case, the deterioration of the lap product cross section at the time of overtaking can be eliminated and the punching force can be improved. Can be prevented from occurring.

FIG. 3 shows another embodiment as an alternative to FIG. In FIG. 3, the same parts as those in FIG. 1 are designated by the same reference numerals, and overlapping description will be omitted.

In FIG. 3, the punch holder 5 and the punch tip 13 are integrated. Further, a lifter spring 47 is provided between the upper flange 5F of the punch holder 5 and the upper surface of the upper turret T _U so as to urge it upward. Punch head 25 and punch driver 1
9 and 9 are integrated, and the punch driver 19 is attached to the punch holder 5 with bolts 21. Urethane rubber 57 is interposed between the punch head 25 and the retainer 39 as an elastic member for the stripper and is constantly urged upward.

The construction of the embodiment shown in FIG. 3 is different from the construction of the embodiment shown in FIG. 1 only in that the punch holder 5 and the punch tip 13 are integrated, and the other construction is different. Are almost the same and have the same action and effect. Since the punch holder 5 and the punch tip 13 are integrated, the parallelism can be further improved as compared with the case of a separate body.

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

[0031]

As will be understood from the above description of the embodiments, according to the inventions of claims 1 and 2, the parallelism of the punch tip with respect to the key on the die supporting member side in the punch press is higher than that of the conventional one. Can be up. Therefore, it is possible to prevent the deterioration of the cross section of the product of the lap portion at the time of overtaking, and it is possible to prevent the occurrence of whiskers of punched scraps.

According to the second aspect of the present invention, the punch holder and the punch tip are integrated so that the parallelism can be further improved as compared with the case where the punch holder and the punch tip are separately provided.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a state in which a punching die and a die die according to an embodiment for carrying out the present invention are mounted.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a front sectional view showing another embodiment replacing FIG.

FIG. 4 is a front sectional view showing a state in which a conventional punching die and a die die are mounted.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 is an operation explanatory view when a work is punched using a conventional punching die and a die die.

[Explanation of symbols]

T _U Upper turret 1 Punching die 5 Punching holder 7 Key groove 9 Key 13 Punch tip 19 Punch driver 25 Punch head 27 Guide post 31 Stripper plate 39 Retainer 51 Strip spring (elastic member for stripper)

Claims (2)

[Claims] 1. A punch chip is provided on a lower surface of a punch holder which is directly attached to a die supporting member in a punch press so as to be vertically movable, and a punch head is provided on an upper portion of the punch holder so that the punch holder is vertically movable. A punching die characterized in that a strip plate is provided below a supported guide post, a retainer is provided above the guide post, and a strip elastic member is mounted between the retainer and the punch head. 2. The punching die according to claim 1, wherein the punch holder and the punch tip are integrated.