KR19990040414A - Drawing mold for shortening process - Google Patents

Abstract

The present invention relates to a drawing die for process shortening, which is divided into an upper mold and a lower mold, and the upper mold is installed on the upper mold holder 10 and the upper mold holder 10 via an elastic spring 11 to form a plate 100. A pad 12 for pressing and fixing, and a punch 13 is installed on the side of the pad 12 to cut or bend the plate 100, the lower mold is a lower mold holder 20, a die which is installed in the lower mold holder 20, on which the plate 100 is placed, and an eject pin 30 for ejecting the plate 100 through the elastic spring 31 at the distal end of the die. In the mold consisting of a), a drawing die 21 is installed on the inner bottom surface of the lower die holder 20, the drawing is formed with a bending groove (22a) so that the plate material 100 can be placed on the top of the trimming die 21 The die 22 is installed and blanked with the eject pin 30 interposed outside the drawing die 22. While the tooth 23 is installed, the outer surface of the punch 13 to be pressed is in close contact with the blankie die 23 of the lower mold holder 20, and the inner surface is in close contact with the trimming die 21 and sequentially. Blanking, drawing, and trimming can be performed continuously by the punch 13 of the upper mold holder 10 being pressed, so that the blanking process, the drawing process, and the trimming process can be performed with one mold. It will be possible to reduce the cost according to the mold production and to maximize the mass production effect due to the process shortening when mass production.

Description

Drawing mold for shortening process

The present invention relates to a press die, and more particularly, to a drawing die for shortening process to enable a multi-step process in a single mold during the drawing operation.

In general, in the sheet metal processing, the external force acts to generate tensile stress, and the work for producing the product with the bottom is collectively used for producing a container having a cylindrical bottom, which is called a folding process, that is, a drawing process.

Such drawing process is usually a multi-step process for producing a container from the plate, as shown in Figure 3, first blanking step 101 and the drawing process for cutting and pressing the plate to produce a container form (102), the trimming step 103 and the primary drawing of the re-drawing step 104 to cut the leading edge of the container to cleanly shape the product, and the piercing processing (105) to form holes in the product, if necessary ) Is added to make a finished product.

By the way, as described above, three processes were required only by the primary processing, and the appearance of the product was not clean.

Therefore, since separate molds are used according to each process, the cost of manufacturing the mold is wasted, and the time required for the transfer between the processes is increased, resulting in a problem that time and cost are increased due to product production. .

Accordingly, the present invention has been made to solve the above problems, the process shortening process to shorten the process by performing a blanking process, a drawing process, a trimming process to produce a drawing product in one mold sequentially The purpose is to provide a drawing mold.

The present invention for achieving the above object is divided into an upper mold and a lower mold, the upper mold is an upper mold holder, and a pad for pressing and fixing the plate material by the elastic spring is installed through the upper mold holder, the side of the pad The lower die is a lower die holder, a die installed in the lower die holder and a plate placed thereon, and an elastic spring at the distal end of the die. In the mold formed by the ejection pin for ejecting the plate material as a medium, a blanking die is installed on the outer peripheral portion of the lower mold holder, the drawing die and a trimming die is installed inside the blanking work by punching the upper mold holder sequentially pressurized And, it is characterized in that the drawing work, trimming work can be made continuously.

With the above structure, when the upper die holder is lowered, the plate placed on the die of the lower die holder is fixed by the pad of the upper die holder, and the outer side of the punch contacts the blanking die to cut the plate, and the punch continues to descend. Then, the drawing is processed on the plate, and the punch is continuously lowered to the trimming die installed under the drawing die, so that trimming is performed.

Accordingly, the blanking process, the drawing process, and the trimming process can be performed with one mold, thereby reducing the cost of manufacturing the mold and maximizing the mass production effect due to the process shortening during mass production.

1 is a side view of a drawing mold according to the present invention;

Figure 2a is a schematic cross-sectional view showing a state in which a blanking operation is made by a drawing mold according to the present invention;

Figure 2b is a sectional view showing a state in which a drawing operation is made according to the present invention,

Figure 2c is a cross-sectional view showing a state in which a trimming operation is performed according to the present invention;

3 is a flow chart illustrating a process for producing a drawing product according to the prior art.

<Description of Symbols for Main Parts of Drawings>

10: upper holder 11: spring

12: pad 13: punch

20: Lower holder 21: Trimming die

22: drawing die 22a: bending groove

23: blanking die 30: eject pin

31: spring

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying exemplary drawings.

1 is a side view of a bending press according to the present invention.

According to the above drawings, the drawing mold is divided into upper and lower molds, and the upper mold is installed on the upper mold holder 10 and the upper mold holder 10 via the elastic spring 11 to press-fix the plate 100. And a punch 12 installed at the side of the pad 12 to cut or bend the plate 100, and the lower mold is a lower mold holder 20. ), A die installed in the lower mold holder 20 and the plate 100 is placed thereon, and an eject pin 30 for ejecting the plate 100 through the elastic spring 31 at the tip of the die. It is configured to produce products through blanking process, drawing process and trimming process.

The present invention is characterized in that the multi-step process can be made in one mold.

Therefore, in the drawing die of the present invention, a trimming die 21 is provided on the inner bottom surface of the lower die holder 20, and a drawing die 22 is provided on the trimming die 21. The blanking work, the drawing work, and the trimming are performed by the punch 13 of the upper holder 10 which is sequentially pressed by the blanking die 23 having the eject pin 30 interposed between the drawing die 22 and the drawing die 22. It is characterized in that the work can be carried out continuously.

That is, the outer surface of the punch 13 is in close contact with the blanking die 23 of the lower die holder 20, the inner surface is in close contact with the trimming die 21, the cutting of the plate 100 is made, trimming The drawing die 22 installed above the die 21 has a structure in which a bending groove 22a is formed so that the plate member 100 can be placed upon drawing to the outer circumferential surface.

With the above structure, when the upper mold holder 10 is lowered, the plate 13 placed on the die of the lower mold holder 20 is fixed by the pad 12 of the upper mold holder 10, and the punch 13 is first. When the outside of the cutting plate (100) in contact with the blanking die 23, the punch 13 is continuously lowered to the drawing processing to the plate 100, the plate 100 is the outer bending groove of the drawing die 22 The punch 13 is continuously lowered to the trimming die 21 installed under the drawing die 22, thereby cutting the outside of the plate 100 to complete the product. will be.

Accordingly, the blanking process, the drawing process, and the trimming process can be performed with one mold, thereby reducing the cost of manufacturing the mold and maximizing the mass production effect due to the process shortening during mass production.

Hereinafter, the operation and effects of the drawing mold for shortening process according to the present invention will be described.

FIG. 2A is a schematic cross-sectional view showing a state in which a blanking operation is performed. When the lower mold holder 20 is lowered, first, the pad 12 of the upper mold holder 10 is placed on the die of the lower mold holder 20. ) Is pressed and fixed, and in this state, the punch 13 fixed to the side of the pad 12 descends and presses the plate 100 placed on the blanking die 23 of the lower mold holder 20. To cut the plate 100.

After the blanking operation is performed as described above, the punch 13 continues to descend with the lower mold holder 20 to bend the plate 100 placed on the drawing die 22.

That is, as shown in FIG. 2B, when the punch is lowered and inserted between the blanking die 23 and the drawing die 22, the plate material 100 placed on the drawing die 22 is the bending groove of the drawing die 22. It is bent to 22a.

In this state, the punch 13 continuously descends to perform the trimming operation. As shown in FIG. 2C, the trimming die 21 is positioned at the lower end of the drawing die 22, so that the outside of the trimming die 21 is located. The plate material 100 which protrudes is pressed and cut | disconnected by the inner edge of the punch 13 which descend | falls.

In this way, as the punch 13 descends in one mold, the blanking process, the drawing process, and the trimming process are sequentially performed, thereby shortening the process.

Meanwhile, an eject pin 30 is provided between the blanking die 23 and the trimming die 21 of the lower mold holder 20 via the elastic spring 31. After the trimming process is finished, as shown in FIG. When the upper mold holder 10 is raised to open the mold, the scrap generated in the trimming operation is removed to the outside while the mold is opened by the spring 31.

As described above, according to the drawing mold for shortening process according to the present invention, the blanking process, the drawing process, and the trimming process can be performed with one mold, thereby reducing the cost of manufacturing the mold, and The mass production effect will be maximized.

Claims (1)

The upper mold is divided into upper mold and lower mold, and the upper mold is installed on the upper mold holder 10 via an elastic spring 11 and a pad 12 for pressing and fixing the plate 100, and the pad ( 12) is formed on the side of the punch 13 made of a punch 13 to be able to work such as cutting or bending the plate 100, the lower die 20 and the lower die holder 20 Blanking process, drawing process, by a die formed of a die consisting of an eject pin (30) for ejecting the sheet material 100 is installed on the die, the plate 100 is placed, the front end of the die via the elastic spring 31 In a drawing work mold capable of performing a trimming process or the like, a trimming die 21 is installed on an inner bottom surface of the lower die holder 20 and a banding is performed so that the plate 100 is placed on the trimming die 21. A drawing die 22 having a groove 22a formed therein is provided, and the drawing die 22 is provided. While the blanking die 23 is provided with the eject pin 30 interposed therebetween, the outer surface of the punch 13 being pressed is in close contact with the blanking die 23 of the lower mold holder 20, and the inner surface is The drawing die for shortening the process, characterized in that the blanking work, the drawing work, the trimming work by the punch 13 of the upper mold holder 10 in close contact with the trimming die 21 can be performed continuously.