JP2552446Y2 - Punch mold - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch die for punching a plate-like work, and more particularly, to a punch die.
The present invention relates to a punch die obtained by disassembling a punch body into a punch body and a punch chip.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, a press punching die is fitted so that a punch body 52 can freely move up and down in a cylindrical punch guide 51 supported by a holder (not shown). And a ring-shaped collar 53 and a punch body 5 fixed to the punch guide 51 so as to return the punch body 52 to its original position after punching.
A strong stripper spring 55 is elastically mounted between the punch head 54 and the punch head 54 screwed to the front end of the second. Since the punch body 52 is formed integrally, when the tip 57 of the punch body 52 is worn, it is necessary to disassemble the assembly, grind the tip 57, or replace it with a new one and reassemble it. .

[0003]

Since the stripper spring 55 for restoring the punch body 52 is fixed by a strong compressive force, the disassembling operation of the punch mold is performed by holding the punch body 52 or the head 54 with a vise or the like. It is necessary to loosen the screw with a strong force using a wrench or the like, which is a troublesome operation. The assembling operation is more troublesome than the disassembling operation because the strip spring 55 needs to be strongly compressed, and the grinding and replacement of the punch tip 57 are extremely troublesome operations.
There is a problem of spending a long time.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention relates to a detachable punch tip at a lower end portion of a punch body which is vertically movably fitted in a cylindrical punch guide. In the punch die that is stopped, locking portions that cannot be disengaged in the axial direction but can be disengaged in the direction perpendicular to the axial direction are formed at the lower end of the punch body and the upper end of the punch chip, respectively. The punch guide is fitted into the punch guide in a state where the locking portions are engaged with each other, so that the punch guide restricts the detachment of the locking portions.

[0005]

In the above construction, the punch body and the punch chip are pulled out from the punch guide and the engaging portion between the punch body and the punch chip is shifted in a direction perpendicular to the axis so that the punch body and the punch chip can be easily disassembled. it can. That is, the disassembly of the punch body and the punch chip without disassembling the stripper spring,
Assembly can be easily performed.

[0006]

1 and 2 show an embodiment of the present invention. FIG.
FIG. 2 is an assembly view of an embodiment of the present invention, and FIG. 2 is a three-dimensional view of a locking portion showing features of the present invention.

Referring to FIG. 1, a punch die 1 comprises a punch body 3 and a cylindrical punch guide 5. The punch body 3 is inserted so as to freely move up and down in the punch guide 5. The punch body 3 is strongly compressed by a compression force between a head nut 7 and a head 9 screwed on an upper portion thereof and a ring-shaped collar 13 fixed to an upper end of the punch guide 5 with a set screw 11. A mounted strip spring 15 is provided. The punch body 3 is divided into a punch body 17 and a punch chip 19 and has a locking portion 2 provided at a lower end of the punch body 17.
1 and a locking portion 23 provided at the upper end of the punch tip 19
Are locked together.

As shown in FIG. 2, the locking portion is formed so as not to be disengageable in the axial direction but to be disengageable in the direction perpendicular to the axial direction. That is, in this embodiment, the locking portion 21 at the lower end of the punch body 17 is formed of a T-groove-shaped locking portion provided in a direction perpendicular to the axial direction. The locking portion 23 of
It comprises a T-shaped projection provided in a direction orthogonal to the axial direction so as to be able to engage and disengage with the T groove.

The locking portion 21 and the locking portion 23 are integrally movable in the axial direction without being disengaged, but can be easily disassembled and assembled in the radial direction. It is only engaged and is not fixed by, for example, a set screw.

The punch body 17 and the punch tip 19 each have a sliding portion with a punch guide so that the punch body 17 and the punch chip 19 can smoothly move up and down in the axial direction.

The punch body 17 and the punch tip 19 can be freely disassembled in the radial direction. However, during use, the engaging state of the locking portions 21 and 23 is maintained by the punch guide 5 so as not to be separated. Because it is restricted, it does not disassemble in the radial direction. Hereinafter, a method of replacing the punch chip 19 in the present embodiment will be described. The set screw 11 connecting the punch guide 5 and the collar 13 in FIG. 1 is removed, and the punch body 17 and the punch chip 19 are integrally pulled out from the punch guide 5. The pulled-out punch body 17 and punch chip 19 are disassembled in a direction perpendicular to the axial direction, and the punch chip 19 is polished or replaced with a new one, and then assembled again. The assembly operation is completed by inserting the assembled portion into the punch guide 5 and attaching the collar portion 13 to the punch guide 5 with the set screw 11.

The structure of the locking portion is not limited to that shown in FIG. 2, but has a dovetail cross section as shown in FIG. 3, and the tensile force is not a plane perpendicular to the axis but an inclined surface. It may be one that works. Further, as shown in FIGS. 4 and 5, a J-shape or an S-shape may be adopted so as to facilitate the fitting. Further, as shown in FIG. 6, the pins may be L-shaped and locked with pins P.

[0013]

As will be understood from the above description of the embodiment, in short, the present invention provides a punch body (17) fitted in a cylindrical punch guide (5) so as to be vertically movable.
The punch die (19) is detachably engaged with the lower end of the punch die (19), and the lower end of the punch body (17) and the upper end of the punch tip (19) are axially engaged and disengaged. The locking portions (21, 23) which can be engaged and disengaged in a direction perpendicular to the axial direction are formed and provided, respectively.
The punch guide (5) in a state where the both locking portions are engaged.
When the punch body (17) is fitted in the inside, the punch guide (5) regulates the detachment of both locking portions.

As is apparent from the above configuration, in the present invention, the locking portions formed at the lower end of the punch body 17 and the upper end of the punch tip 19 are not disengageable in the axial direction and cannot be disengaged in the axial direction. The punch body 1 is formed so as to be capable of engaging and disengaging in a direction orthogonal to the first direction, and is configured to restrict the disengagement of both locking portions by the punch guide 5.
As long as the punch 7 and the punch tip 19 are located in the punch guide 5, they are safe from being detached in the axial direction even by the impact or vibration during hatching, and are safe from the punch guide 5. When the chip 19 is pulled out, the punch chip 19 can be easily separated from the punch body 17 and the punch chip 19 can be easily re-ground.

As described above, the punch body 17
The locking portion at the lower end of the punch tip 19 and the locking portion at the upper end of the punch tip 19 are configured so that they cannot be disengaged in the axial direction and can be disengaged in the direction perpendicular to the axial direction. The punch guide 5 not only fits and holds the punch body 17 so as to be vertically movable, but also the punch body 17 and the punch tip 19.
Since the locking portion is restricted from disengaging from the locking portion, it is sufficient that both locking portions engage with each other in an axially immovable state. Is unnecessary.

[Brief description of the drawings]

FIG. 1 is an assembly view of an embodiment according to the present invention.

FIG. 2 is a three-dimensional view of a punch body and a punch chip shown in FIG. 1;

FIG. 3 is a view showing an embodiment in which a locking portion has a dovetail shape.

FIG. 4 is a view showing an embodiment in which a locking portion has a J-shape.

FIG. 5 is a view showing an embodiment in which a locking portion is formed in an S shape.

FIG. 6 shows an embodiment in which the locking portion is L-shaped and pin-connected.

FIG. 7 is a diagram showing a conventional method of disassembling and assembling a punch die.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Punch die 3,52 Punch body 5,51 Punch guide 7 Head nut 9 Head 11 Set screw 13,53 Collar 15,55 Stripper spring 17 Punch body 19,57 Punch tip 21,23 Locking part

Claims (1)

(57) [Scope of request for utility model registration] 1. A punch die having a punch tip (19) detachably engaged with a lower end of a punch body (17) fitted up and down in a cylindrical punch guide (5). An engaging portion (2) which cannot be disengaged in the axial direction but can be disengaged in the direction perpendicular to the axial direction, at the lower end of the punch body (17) and the upper end of the punch tip (19).
The punch guide (5) is formed by fitting and forming a punch body (17) in the punch guide (5) in a state in which the locking portions are engaged.
A punch die having a configuration for restricting detachment of both locking portions by means of the punch die.