JPH0910860A - Press punching device - Google Patents

Abstract

PURPOSE: To provide a press punching device capable of continuously bending and punching a bending part with one process of a die of one body structure in pressing. CONSTITUTION: Bending and punching are continuously executed with one process by using an upper die which has a punching punch freely slidably built in a bending punch 3 and is freely ascendable and discendable, and a lower die having a punching and bending die 4 having an opposite guide hole 4a inside and a knockout 5, thereby the machining product excellent in productivity and having excellent mutual and relative precision in bending and punching can be obtained with the inexpensive die of a small size and a simple structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press punching apparatus for bending and punching a metal plate or the like in one continuous process.

[0002]

2. Description of the Related Art Conventionally, in order to obtain a sheet metal product in which a bent portion of a metal plate or the like has been punched with square holes or the like, manufacturing process steps shown in FIGS. As shown in the figure, a plate material 21 made of a metal material is first punched into square holes 22, and then bent at an angle α to form a processed product 23 by two separate independent processes.

[0003]

However, in the press punching device having the above-mentioned conventional structure, two steps of the punching process and the bending process are required independently of each other, and the accuracy of mutual processes can be sufficiently ensured in the separate processes. Difficult, large number of molds,
It had a problem of becoming expensive.

The present invention is intended to solve such a conventional problem, and is small in size and simple in structure with high productivity.
An object of the present invention is to provide a press punching device.

[0005]

In order to solve the above-mentioned problems, a press punching device according to the present invention has a punching punch built in a bending punch for bending, and the punching die is placed in an opposing bending die. After the bending process is performed in the integrated die provided with, the punching process is performed in one continuous process.

[0006]

With this configuration, it is possible to obtain a processed product having a good mutual and relative accuracy of bending and punching in one step with a die having a small size and a simple structure.

[0007]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially sectional front view showing the structure of the main part of the press punching device according to the embodiment, and FIG. 2 is an exploded perspective view of the main parts for punching and bending the device, FIG.
FIG. 7A shows a plate material 1 which is a metal material before being machined using the same apparatus, and FIG. 7B shows a square hole 15 of a punched hole having an angle α.
It is a perspective view of the processed product 16 which has been punched and bent, which is provided on the slope portion which has been bent. In FIGS. 1, 2 and 7, the rectangular plate material 1 made of, for example, a metal material of iron, aluminum, brass is positioned in close contact with the side surface of the punching / bending die 4 and vertically mounted. The slidable knockout 5 is protected and held by a punching / bending die 4 provided through a spring 6 which is held / movable and through which a punching guide hole 4a is passed through an inclined surface of an upper surface having a bending inclination angle α. Die holder 1 along with die plate 10
1 and a guide hole 4a for punching the punching / bending die 4 for punching the plate material 1 into a square hole 15 having a desired shape.
The punching punch 2 having a slanting surface which is opposed to, and has a corresponding tip surface inclined at an angle α, has a punch plate 8 for protection and holding, and a guide hole 2a for allowing the punching punch 2 to slide on a flat working surface. The bending punch 3 formed by the inclined surface having the inclination angle α provided therethrough is fixedly held by the stripper plate 9, and the punch holder 7 is held by the holding / driving spring 12.
It is composed of an upper mold connected to.

Next, the operation will be described with reference to FIGS. 1 and 3 to 6.
The lower die is attached to a fixed portion of a press machine (not shown), and the upper die is attached to an elevating and lowering movable portion thereof. As shown in FIG. 3, the plate material 1 is defined on the upper surface of the knockout 5 of the lower die. The knockout 5 is mounted and positioned by the spring 6, and then the press machine is operated as shown in FIG. 4, and when the upper die is lowered, the flat surface of the processing surface of the bending punch 3 is the upper surface of the plate material 1. When the plate material 1 is sandwiched and held by the upper surface of the knockout 5 which is in contact with the upper surface of the knockout 5 and which is positioned from the holding position by the spring 6, when the upper die is lowered,
As shown in FIG. 3, the plate material 1 descends while being sandwiched between the plane of the processing surface of the bending punch 3 and the knockout 5, and the bending punch 3
When the upper die is further bent, the stripper plate 9 holding the bending punch 3 is held by holding the stripper plate 9 which is bent by the bending surface of the punching / bending die 4 and the upper surface of the knockout 5. When the driving spring 12 is compressed, the punching punch 2 becomes the bending punch 3 as shown in FIG.
After forming the square hole 15 by punching out the bent slope portion of the plate material 1 by the guide hole 4a of the punching / bending die 4 facing the guide hole 2a and the tip of the slope of the punching punch 2, The upper die is raised and returned to the original position shown in FIG. 3 to complete one step and the processed product 16 is completed.

[0010]

As described above, the press punching apparatus according to the present invention has a structure in which a bending process and a punching process are built in or provided inside and integrated with a die, and the continuous bending process and the punching process are performed in one step. It is possible to realize a press punching device that is small and has a simple structure and is inexpensive, and that can produce processed products with excellent mutual productivity and relative accuracy between bending and punching with excellent productivity improvement. It is possible.

[Brief description of the drawings]

FIG. 1 is a partial sectional front view showing the configuration of the main part of a press punching device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a punch and a die which are main parts according to the embodiment.

FIG. 3 is a cross-sectional view of a main portion of a plate mounted state, showing the steps of punching / bending operation in order according to the embodiment.

FIG. 4 is a sectional view of the main part of the same in which the plate material is sandwiched.

[Fig. 5] Similarly, a cross-sectional view of a main part in a bent state.

FIG. 6 is a sectional view of the main part of the punched state of the square hole.

FIG. 7 (a) is a perspective view of a plate material before being processed according to the same embodiment; and (b) is a perspective view of a processed product subjected to the punching and bending processes.

FIG. 8 is a manufacturing process diagram for explaining conventional manufacturing processes of punching and bending.

[Explanation of symbols]

 1 plate material 2 punching punch 2a guide hole 3 bending punch 4 punching / bending die 4a guide hole 5 knockout 6 spring 7 punch holder 8 punch plate 9 stripper plate 10 die plate 11 die holder 12 spring 15 square hole 16 processed product

Claims (1)

[Claims] 1. A processed surface is formed by a flat surface portion and a sloped surface portion,
A bending punch attached to the punch holder via a spring, and a guide hole formed in the inclined surface of the bending punch with its tip end formed on the same inclined surface as the inclined surface of the bending punch and extending vertically. An upper die part which is slidably assembled into the punch holder and has a rear end surface which is composed of a punching punch fixedly connected to the punch holder, and which has a machining surface facing the slope part of the bending punch. A sloping surface, a punching / bending die coupled to a die holder provided through a guide hole through which the punching punch is inserted, and a flat surface portion abutting the flat surface portion of the bending punch are provided at the tip. A press punching device consisting of a lower die part composed of a knockout that is vertically movable to a die holder via a spring.