JP2561405B2 - Upper mold - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper die for pressing a plate material in cooperation with a lower die.

[0002]

2. Description of the Related Art Conventionally, a punch of an upper die mounted on, for example, a turret punch press which presses a plate material is made of a metal integral type or has a lower end surface of a metal punch. In general, a cushioning member such as urethane is integrally provided.

[0003]

By the way, in the metal integrated punch in the above-mentioned conventional turret punch press, since the punch directly hits the plate material during punching, there is a problem that noise is generated and the working environment is extremely bad. there were. Further, in a punch in which a cushioning member such as urethane is provided at the lower end of the punch, needle-like debris generated at the time of punching may adhere to or stick to the cushioning member such as urethane. Therefore, there is a problem that the surface of the plate material is flawed and cannot be continuously used.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an upper mold in which noise generated during punching is reduced and sticking of punched dust and the like is prevented in order to improve the above problems.

[0005]

In order to achieve the above object, the present invention provides a punch guide, on which a punch is mounted so as to be able to move up and down, so as to move up and down on an upper die holding member, and the lower end of the punch guide. A stripper plate was provided via a cushioning member, and a predetermined amount of gap was provided between the lower surface of the lower end of the punch guide and the upper surface of the stripper plate to form the upper mold.

[0006]

By adopting the upper die of the present invention, the stripper plate is provided at the lower end of the punch guide via the cushioning member, so that when the stripper plate hits the plate material during punching, Shock is absorbed and noise is suppressed. Further, since a slight amount of gap is provided between the lower surface of the lower end portion of the punch guide and the upper surface of the stripper plate, the buffer member will not be deformed more than necessary, so that the life of the buffer member can be extended.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to this embodiment will be described below with reference to the drawings.

Referring to FIG. 3, for example, a turret punch press 1 as a press machine is provided with an upper turret 3 as an upper die holding member and a lower turret 5 as a lower die holding member which are vertically opposed to each other. , Upper turret 3
A detachable upper die 7 is provided on the lower turret 5, and a detachable lower die 9 is provided on the lower turret 5.

Explaining the details of the upper die 7, the upper turret 3 is provided with an upper die mounting hole 11, and the upper die mounting hole 11 is provided with a punch guide 13 which is vertically movable. The punch guide 13 has through holes 15 penetrating both ends, and is characterized by being configured without a bottom. Further, in order to prevent the punch guide 13 from rotating with respect to the upper turret 3, a proper number of vertically extending key grooves 17 are provided in the punch guide 13, and a notch formed continuously with the upper die mounting hole 11 is provided. The portion 19 is provided with a detent key 21 that can be engaged with the key groove 17.
Further, between the flange 23 integrally provided on the upper side of the punch guide 13 and the upper surface of the upper turret 3, a lift spring 25 for appropriately urging the punch guide 13 upward is provided.

A punch 27 is provided in the through hole 15 of the punch guide 13 so as to be movable up and down, and a tip portion (lower end portion) of the punch 27 is thin according to a machining shape.
A stripper spring 31 for urging the punch 27 upward is provided between the flange 23 and the punch head 29 integrally provided on the upper end of the punch 27. The urging force of the stripper spring 31 lifts the lift. It is larger than the biasing force of the spring 25.

A stripper plate 35 is provided at the lower end of the punch guide 13 via a cushioning member 33 made of an elastic material such as urethane rubber or silicon rubber.

Explaining the details of the lower mold 9, a lower mold mounting hole 37 is provided at a position vertically opposed to the upper mold mounting hole 11 in the lower turret 5, and the lower mold mounting hole 37 is provided. A die 41 having a die hole 39 is provided in the hole 37. This die 41 is attached to the lower turret 5
The die 41 is provided with a proper number of vertically extending key grooves 43 so that the die 41 can rotate, and the notch 45 connected to the lower die mounting hole 37 is engaged with the key groove 43. A possible detent key 47 is provided.

With the above structure, the punch 27 is lowered by pressing the punch head 29 with a striker (not shown), and the punch guide 13 also lifts the lift spring 2.
It descends against the urging force of 5. As a result, the punch guide 1 including the stripper plate 35 and the buffer member 33 is provided.
3 descends, and the plate material W located on the lower die 9 can be pressed from above. Further, the punch 27 descends and cooperates with the lower die 9 to perform desired press working (for example, punching) on the plate material W.

Next, the punch guide 13, the cushioning member 33, and the stripper plate 35, which are the main parts of this embodiment, will be described in more detail.

Referring to FIGS. 1 and 2, a punch 27 is mounted inside the punch guide 13 so as to be movable up and down, and a key groove 17 extending along the axis is formed on the outer periphery of the punch guide 13. Then, the detent key 21 provided on the upper turret 3 is engaged with the key groove 17, and the punch guide 1
3 is mounted on the upper turret 3 so that it can be raised and lowered.

An annular recess 51 having a locking projection 49 for locking the buffer member 33 is formed on the lower end portion 13a of the punch guide 13.

The cushioning member 33 is made of an elastic material such as urethane rubber or silicon rubber, has a ring shape, and protrudes inward from the fitting portion 55 on the peripheral annular portion 53. The portion 55 is fitted into the annular recess 51 provided on the lower side of the punch guide 13.

The stripper plate 35 is made of a metal and has a disk shape, and a through hole 57 is formed in the shaft center thereof into which the punch 27 is inserted. Then, on the upper surface of the stripper plate 35, an annular recess 61 having a locking projection 59 that is locked by the buffer member 33 is formed.

Further, as shown in FIG. 1, the stripper plate 35 and the buffer member 33 are connected to the punch guide 13.
The locking pin 63 penetrates the stripper plate 35 and the buffer member 33 so as not to rotate with respect to the punch guide 13.
Has been inserted. When the stripper plate 35 is assembled via the cushioning member 33 as shown in the drawing of FIG. 1, a gap is formed between the upper surface 65 of the stripper plate 35 and the lower surface 67 of the lower end portion 13a of the punch guide 13. X
The dimension between the fitting portions 55 of the cushioning member 33 is determined so that The size of the gap X is preferably about 1 mm.

With the above-described structure, even if the stripper plate 35 made of metal hits the plate material W during punching, the cushioning member 33 incorporated in the punch guide 13, such as urethane rubber or silicon rubber, has the function. Since the cushioning function absorbs noise, noise can be suppressed and the working environment can be improved. Further, the deformation of the cushioning member 33 is the amount of the gap X (about 1 mm), and since the upper surface 65 of the stripper plate 35 abuts the lower surface 67 of the punch guide 13 more than that, without causing unnecessary deformation, Since needle-like debris generated during punching does not adhere to the cushioning member 33, it is possible to extend the life of the cushioning member 33. Also, in FIG.
As shown well, it is installed above the cushioning member 33.
The fitting portion 55 is an annular shape provided below the punch guide 13.
The cushion member 3 is fitted with the recess 51 with one touch.
The fitting portion 55 provided on the lower side of the strip 3 is attached to the stripper plate 35.
It fits into the provided annular recess 61 with one touch.
Therefore, the punch guide 13, the cushioning member 33, and the strike
Attach and remove each ripper plate 35 in a short time
It can be performed. Therefore, for example
When replacing with a die, use the conventional punch assembly.
Replace all or punches and punch guides
On the other hand, just replace the punch 13 and the stripper 35.
And the punch guide 13 can be used in common without replacement.
Can be used.

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

[0022]

As will be understood from the above description of the embodiments, according to the present invention, since the structure is as described in the claims, a cushion is provided between the punch guide and the stripper plate. It is possible to suppress the noise generated when the plate material is pressed by the upper die and the lower die during punching by interposing the member, and it is possible to improve the working environment. In addition, since a slight amount of clearance is provided between the punch guide and the stripper plate, the cushioning member is not compressed more than necessary, and the cushioning member is not scratched by the needle-like debris generated during punching. The life of the member can be extended.

[Brief description of drawings]

FIG. 1 is a magnified view showing a main part of the present invention and showing an arrow I in FIG.

FIG. 2 is an exploded explanatory view of FIG.

FIG. 3 is a cross-sectional view showing a processed portion including an upper die and a lower die according to an embodiment of the present invention.

[Explanation of symbols]

 3 Upper Turret (Upper Die Holding Member) 7 Upper Die 13 Punch Guide 13a Lower End 27 Punch 33 Cushioning Member 35 Stripper Plate 65 Upper Surface 67 Lower Surface X Gap

Claims (1)

(57) [Claims] 1. A punch guide in which a punch is liftably mounted is provided on an upper die holding member so as to be lifted up and down, and a stripper plate is provided on a lower end portion of the punch guide via a cushioning member, and a lower end portion of the punch guide. An upper mold, wherein a predetermined amount of gap is provided between a lower surface of the stripper and an upper surface of the stripper plate.