JPH05285560A - Punching die - Google Patents

Abstract

PURPOSE:To easily exchange a stripper plate without using tools by attaching a punch which is freely vertically movable in a punch guide and also fitting stripper plate which is freely slidable horizontally to a groove provided at the tip of the punch guide. CONSTITUTION:A punching die 1 is provided with the punch guide 3, and this punch guide 3 is attached to be freely movable vertically on the upper turret in a turret punch press. A punch body 5 is attached to be freely movable vertically in the punch guide 3, and a stripper plate 31 is fitted to a U-shaped groove formed at the tip of the punch guide 3 by sliding it from the horizontal direction. At the tip of a notched part in the groove of the punch guide 3, a ball plunger 29 is provided as a stopper member to prevent the stripper plate 31. Thus, the stripper plate is easily exchanged in accordance with the punch guide at the time of exchanging the punch and the stripper plate.

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.

[0002]

2. Description of the Related Art Conventionally, as a punching die for punching a work, a punch body as a vertically movable punch is mounted in a punch guide. Moreover, a stripper plate is provided at the tip of the punch guide. The stripper plate is attached to the punch guide with a retainer ring such as a snap ring.

[0003]

By the way, since the retainer ring is used to attach the stripper plate to the above-mentioned conventional punch guide, when the stripper plate is detached from the punch guide, the retainer ring is removed with a tool. There was a problem that it had to be very troublesome.

SUMMARY OF THE INVENTION An object of the present invention is to provide a punching die which can be easily replaced without using a tool when replacing the punch and the stripper plate in order to solve the above problems.

[0005]

In order to achieve the above object, the present invention mounts a vertically movable punch in a punch guide, and provides a groove at the tip of the punch guide, and the groove is provided in a horizontal direction. From the above, a punching die was constructed by fitting a slidable stripper plate.

In the punching die, the blade edge portion of the punch is usually positioned at the thickness portion of the stripper plate, and a retaining member is provided at the tip of the notch in the groove of the punch guide to prevent the stripper plate. Is desirable.

[0007]

By using the punching die of the present invention, since the stripper plate is fitted in the groove provided at the tip of the punch guide, the punch guide is removed after the punch guide is removed from the punch guide. When the stripper plate is attached to or detached from the stripper plate, it is easily removed and replaced by sliding the stripper plate horizontally from the groove of the punch guide by an operator.

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings.

Referring to FIG. 1, the punching die 1 is provided with a punch guide 3. The punch guide 3 is provided in a mounting hole provided at an appropriate position on the circumference of the upper turret in a turret punch press, for example. It is mounted so that it can move up and down. A vertically movable punch body 5 is mounted in the punch guide 3 so as to be vertically movable.

A punch shank 7 extending vertically is integrally provided on the upper part of the punch body 5. A punch head 11 is attached to the upper portion of the punch shank 7 with a plurality of bolts 9.

A spring cover 13 is provided between the punch head 11 and the flange portion 3F of the punch guide 3, and a spring 15 is interposed in the spring cover 13. A key groove 17 is formed vertically on the right side of the punch guide 3 in FIG. 1, and a key 19 provided on the punch body 5 is engaged with the key groove 17. The tip of the punch body 5 is integrated with a punch tip 21, which is a cutting edge portion.

As shown in FIGS. 2, 3 and 4, a U-shaped groove 23 is formed in the lower portion of the punch guide 3, and the groove 23 is formed as shown in FIGS. In the vertical direction, a concave groove 25 is formed. Further, a positioning pin 27 and a ball plunger 29 (a retaining member) are provided on the lower surface of the punch guide 3 so as to correspond to each other.

The stripper plate 31 is slid from the horizontal direction into the U-shaped groove 23 formed at the tip of the punch guide 3 so as to be fitted therein. That is, the stripper plate 31 is detachably attached to the punch guide 3.

Around the stripper plate 31, there is formed an engaging projection 33 that engages with the groove 25. Further, the stripper plate 31 has the positioning pin 27.
An engaging groove 35 for engaging with is provided.

With the above structure, the stripper plate 31
4 is attached to the tip of the punch guide 3, the stripper plate 31 is slid with a finger from the horizontal direction as shown by an arrow in FIG. By aligning the groove 35 with the positioning pin 27 and pushing the ball of the ball plunger 29 until the ball is visible, the stripper plate 31 is attached to the tip of the punch guide 3 without using a tool or the like.
Then, the punch body 5 is mounted in the punch guide 3.

The stripper plate 31 is attached to the punch guide 3
When removing the punch body 5 from the punch guide 3 and sliding the stripper plate 31 from the side of the punch guide 3, the engaging groove 35 is disengaged from the positioning pin 27 and the engaging convex portion 33 is engaged. The stripper plate 31 is easily removed from the punch guide 3 by being removed from the mating groove 25.

The stripper plate 31 is prevented from coming off by a double structure in which the punch tip 21 (blade tip portion) of the punch body 5 is contained in the stripper plate 31 and the function of the ball plunger 29. is there.

As described above, the replacement of the stripper plate 31 with respect to the punch guide 3 does not require a conventional tool, and the troublesome work is eliminated, and the replacement can be easily performed.

It should be noted that the present invention is not limited to the above-described embodiments and can be implemented in other modes without making appropriate modifications.

[0020]

As will be understood from the above description of the embodiments, according to the present invention, since the construction is as described in the claims, the tool is replaced when the punch and the stripper plate are replaced. The stripper plate can be easily replaced with respect to the punch guide without using it.

[Brief description of drawings]

FIG. 1 is a front sectional view of an example punching die according to the present invention.

FIG. 2 is an enlarged view of a portion viewed from arrow I in FIG.

FIG. 3 is a bottom view of FIG.

FIG. 4 is an explanatory view of the action of attaching and detaching the stripper plate to and from the punch guide.

[Explanation of symbols]

 1 Punching Die 3 Punch Guide 5 Punch Body 21 Punch Tip (Blade Edge) 23, 25 Groove 27 Positioning Pin 29 Ball Plunger 31 Stripper Plate 33 Engagement Convex Part

Claims (2)

[Claims] 1. A vertically movable punch is mounted in the punch guide, and a groove is provided at the tip of the punch guide.
A punching die characterized in that a stripper plate that is slidable from the horizontal direction is fitted in this groove. 2. A punch edge portion is usually positioned in the thickness portion of the stripper plate, and a retaining member is provided at the tip of the notch in the groove of the punch guide to prevent the stripper plate. The punching die according to claim 1, which is characterized in that.