JPS6222269Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> The disclosed technology is applicable to a plurality of irregularly shaped workpieces when a common punching process such as hole punching or cutting is performed on a plurality of workpieces with a press or the like. It belongs to the field of structural technology for cutting dies that are stacked and processed at the same time.

This invention uses a downwardly concave upper die with a punch attached to the center downward and an upwardly convex lower die with a die attached to the center to press the workpiece into a predetermined shape such as a drawing press. This invention relates to a cutting die structure that allows for punching and forming, and in particular, one workpiece is held down by a workpiece holding piece interposed between both side parts extending downward from a downwardly concave upper die. , the other workpiece, which has a different shape from the one workpiece, is fitted with an upwardly convex lower die, and the lower extensions from both sides of the upper die equipped with punches and dies correspond to this. A cutting die structure in which a cutting blade and a receiving blade are respectively attached to the proximal portion of the lower die, and workpieces of different shapes are overlapped at the same time at their contact areas to punch and cut holes in one pass. This is an idea related to.

<Prior art> As is well known, various press-drawing dies such as hole-cutting dies, cutting dies, outline-cutting dies, etc. are used to punch various irregular-shaped workpieces drawn with different press-drawing dies into predetermined shapes. It is designed to be molded using a press machine.

Furthermore, for example, the publication ``Illustrated Press Mold Structure and Its Design'' published by Nikkan Kogyo Shimbun in 1977 shows a processing technique for simultaneous hole punching and edge cutting.

<Problems that the invention aims to solve> However, even if conventional press cutting dies can perform common punching processes such as punching holes and cutting for different-shaped workpieces, they overlap each other in the die each time. Since the workpieces are set together, variations tend to occur in each workpiece during machining in each process, and it is difficult to determine the machining position for each workpiece when machining multiple workpieces at the same time. Another drawback was that it could not be stamped into a predetermined shape.

In addition, even when performing common punching processes such as punching and cutting for each irregularly shaped workpiece, a variety of dedicated press dies are used separately for each workpiece, and punching and cutting are carried out one by one. Since a punching process is performed to form a predetermined shape, there are disadvantages in that the number of machining steps is large, the machining speed cannot be increased, and productivity cannot be improved.

The purpose of this invention is to solve the technical problem of simultaneous punching of multiple workpieces of irregular shapes based on the above-mentioned conventional technology, and to provide a workpiece holding piece in a downwardly concave upper mold, A convex lower mold is molded into a shape that allows a workpiece to be fitted freely, and cutting blades are attached to the lower extensions of both sides of the upper mold and the corresponding proximal parts of the lower mold to enable close separation. This makes it possible to stack and set multiple workpieces of different shapes in a mold at the same time, and punch them into a predetermined shape at the contact area of both workpieces. The purpose is to provide a cutting die structure.

<Means/effects for solving the problems> In accordance with the above-mentioned purpose, the structure of this invention, which is summarized in the scope of the above-mentioned utility model registration claims, is to solve the above-mentioned problems, by using various workpieces formed into various shapes. When performing common punching processes such as hole punching and cutting, multiple workpieces with irregular shapes that can be stacked are selected and set in advance, and they are integrally installed on both sides of a downwardly concave upper die. A workpiece holding piece holds one workpiece with an irregular shape on the upper side, and the other workpiece with an odd shape on the lower side is fitted into a lower mold formed into a shape that allows the workpiece to be fitted, and the workpiece holding piece and an upwardly convex shape are fitted. A plurality of irregularly shaped workpieces are stacked and set between the lower molds, and a punch attached downward in the center of the upper mold, cutting blades provided on the downward extensions on both sides of the upper mold, and cutting blades of the lower mold. It is possible to punch and form multiple workpieces of irregular shapes at the same time through the contact parts of the die provided in the center and the cutting blades of the receiving blades provided on the parts corresponding to the downward extensions on both sides of the upper mold. This was achieved by taking technical measures to achieve this goal.

<Example> Next, an example of this invention will be described below based on the drawings.

1 is the cutting die that forms the center of the idea,
An upper die 2 having a downwardly concave shape and a lower die 3 having an upwardly convex shape are fixed to a press device (not shown). It has it facing towards the side.

Between both sides 4 and 4 of the upper mold 2, a work holding piece 7 whose lower surface is formed so as to come into contact with and clamp a predetermined drawn work 6 from above is attached to a spring 9 from the upper mold 2. It is suspended by.

During processing, the spring guide 8 fixedly extending downward from the upper mold 2 is set to a predetermined length so as not to come into contact with the bottom of the recess formed on the upper surface of the workpiece holding piece 7, and the workpiece holding piece Reference numeral 7 allows the punch 5 to protrude through each spring 9 that is mounted on the guide 8.

On the other hand, the upwardly convex lower mold 3 has a die 10 above the position corresponding to the punch 5, and has a shape that allows another work 11 having a different shape than the work 6 to come into contact with the upper surface of the die 10 and to be fitted therein. It is molded into.

In addition, an upper blade 12 and a receiving blade 13 as cutting blades are attached to mutually adjacent corresponding portions of the lower inner sides of the downwardly extending side parts 4 of the upper die 2 and the outer upper part of the lower die 3, respectively. There is.

The irregularly shaped workpieces 6 and 11 used in the cutting die 1 and processed at the same time are shaped so that they can be stacked vertically, and have a common hole in the contact area where both the workpieces come into contact. It is limited to those that can perform punching and forming such as punching and cutting the outer edges.

In the above-mentioned configuration, when forming the irregularly shaped workpieces 6 and 11 drawn by a predetermined means, the common hole punching and outer shape cutting are performed simultaneously.
As shown in FIG. 2, a workpiece 11 is fitted into the lower die 3, and a workpiece 6 having an irregular shape is placed on the workpiece 11.
Place it through the contact part to set it.

Next, when the press ram of the press device (not shown) is gradually lowered, the downwardly concave upper die 2 is gradually lowered relative to the upwardly convex lower die 3, and the upper die 2 inserted in the upper die 2 is The workpiece holding piece 7 clamps the upper workpiece 6, and the workpiece 6 is pressed from above by the workpiece holding piece 7 and the lower workpiece 11 is pressed.
At the same time, it is reliably set in the lower die 3 and positioned for stamping into a predetermined shape.

When the press ram further descends to the bottom dead center in this state, as shown in FIG.
The die 10 and the receiving blade 13 of the corresponding parts provided in the workpieces 6 and 11 are engaged with each other, and the common blanking parts are simultaneously formed at the contact portions of both the workpieces 6 and 11.

It is needless to say that the embodiment of this invention is not limited to the above-mentioned embodiment. For example, instead of the spring that suspends the workpiece holding piece between both sides extending downward from the upper die, a material such as urethane rubber may be used. Various aspects can be adopted, such as selecting and replacing the elastic material as appropriate.

<Effects of the invention> As described above, according to this invention, in a punching die structure for punching, punching, cutting, etc. of a common part of a plurality of irregularly shaped workpieces formed by a predetermined method, the lower A work holding piece for clamping one irregularly shaped workpiece is interposed between both sides extending downward from a concave upper die, and the other has an upwardly convex shape into which the other irregularly shaped workpiece can be fitted. A lower mold was formed, and upper and lower cutting blades were attached to the lower extensions on both sides of the upper mold with the punch and the corresponding parts of the lower mold with the die so that they could engage with each other. By this,
For forming common punching parts such as hole punching and cutting of multiple irregularly shaped workpieces, multiple workpieces are stacked one on top of the other, and the contact parts can be punched simultaneously using one cutting die. Excellent effects are produced.

In addition, by firmly clamping one workpiece with the workpiece holding piece provided on the upper die and fitting the other irregularly shaped workpiece with the lower die, positioning for each workpiece before processing is performed reliably, and the workpiece This has the effect of preventing variations during processing and efficiently obtaining good punched and molded products.

Furthermore, by being able to simultaneously punch out multiple irregularly shaped workpieces into predetermined shapes with one cutting die, hole punching dies,
This has the advantage that the number of cutting dies such as cutting dies and external die cutting dies can be significantly reduced.

[Brief explanation of drawings]

The drawings are explanatory diagrams of one embodiment of this invention, in which Fig. 1 is an overall sectional view of the cutting die, Fig. 2 is a partially enlarged sectional view of the lower die, and Fig. 3 is a partially enlarged sectional view of Fig. 1. . 2... Upper die, 5... Punch, 3... Lower die, 10
... Die, 1 ... Cutting die, 4, 4 ... Both sides extending downward, 7 ... Work holding piece, 6, 11 ... Workpiece, 12, 13 ... Cutting blade.

Claims (1)

[Scope of utility model registration request] In a cutting die structure in which a punch provided downward in the center of a downwardly concave upper die freely punches a workpiece against a die provided in the center of an upwardly convex lower die, the above-mentioned upper A workpiece holding piece for one workpiece is provided between both sides extending integrally from the mold, and another workpiece that has a different shape from the one workpiece and can be freely overlapped with the one workpiece is fitted. The lower mold, which is formed into an upwardly convex shape, has portions on both sides extending downward from the upper mold that can be moved toward and away from the upper mold. A cutting die structure characterized in that a corresponding part of the lower die that can freely move toward and away from the workpieces is provided with cutting blades, an upper blade of the upper die and a lower blade of the lower die, for the contact portion of both workpieces.