CN202070642U - Finishing mould - Google Patents

Abstract

The utility model discloses a finishing mould which comprises a male die and a female die. The male die is externally provided with a fixed plate, the female die is internally provided with a reverse supporting block, a reverse supporting rod is arranged under the reverse supporting block, a female die base plate is arranged under the female die, the reverse supporting rod is inserted into a guide hole on the female die base plate, and the female die is provided with a material guiding chamfer. A finishing method comprises the following steps of: firstly, putting a metal blank between the male die and the female die, and leading some metal blank to enter into a material guiding cavity of the female die partially; and then the metal blank is pressed into the female die by the male die, the reverse supporting block is under the state of reverse supporting pressure at the same time, and the metal blank and the reverse supporting block move downwards under the action of the male die till the reverse supporting block presses against the female die base plate, and the material is filled at the cross section of the blank in a flowing way to form a smooth surface so as to realize the whole finishing process. The finishing mould is simple in structure, good in finishing effect and long in service life.

Description

Finishing mold

technical field

The utility model relates to a metal blank forming die, in particular to a finishing die.

Background technique

With the development of automobile and electrical industry, blanking parts have been widely used. However, with the continuous development of stamping varieties, many parts can no longer fully meet the final use requirements after simple punching, especially some high-end stamping products, which also put forward strict requirements on the quality of the section and the size of the collapse angle, which requires Subsequent processes are used to complete the cross-sectional quality and slump size requirements that cannot be achieved by simple blanking.

As shown in FIG. 1 , it is a schematic diagram of simple blanking of workpieces in the prior art. The metal sheet is located between the pressing plate 11 and the die 15. During punching, the sheet is plastically deformed and separated under the shearing action of the punch 12 and the die 15, and the workpiece 14 moves down and leaks out of the cavity of the die 15. , the waste material 13 is on the surface of the die 15, and it is removed by using an air gun or other auxiliary devices.

There are at least the following shortcoming in the above-mentioned prior art: the one, the workpiece 14 section that material forms under the effect of punch 12 and die 15 has only 1/3rd part of the side surface away from punch 12 to be a bright surface, and the remaining part All are tearing bands formed under the action of tension; the second is that during the punching process, a large collapse angle is formed on the surface of the workpiece 14 away from the punch 12, and a large burr is formed on the side of the workpiece 14 that contacts the punch 12. ; Affect the service life of the mold.

Utility model content

The purpose of the utility model is to provide a finishing mold with simple structure, good applicability, low cost and long service life.

The purpose of this utility model is achieved by the following technical solutions:

The finishing mold of the present utility model comprises a punch and a die. The outside of the punch is provided with a fixing plate, and the cavity of the die is provided with a reverse ejector block. .

It can be seen from the technical solution provided by the above-mentioned utility model that, in the finishing mold described in the utility model, since the cavity of the die is provided with a reverse ejector block, there is a reverse ejector pin under the reverse ejector block. The utility model has the advantages of simple structure, good applicability, low cost and long service life.

Description of drawings

Fig. 1 is a simple punching die and a structural schematic diagram of the prior art;

Fig. 2 is the structural representation of finishing mold of the present utility model;

3a-3c are schematic diagrams of the process of the finishing method of the present invention.

Detailed ways

The utility model embodiment will be described in further detail below in conjunction with accompanying drawing:

The finishing mold of the present utility model, its preferred specific embodiment is as shown in Figure 2, comprises punch 22, die 24, and punch 22 is provided with fixing plate 21 outside, and the die cavity of die 24 is provided with reverse Jacking block 26, anti-jacking rod 25 is provided below the anti-jacking block 26.

A die backing plate 27 is arranged below the die 24, and a guide hole is arranged on the die backing plate 27, and the reverse ejector pin 25 is inserted into the guide hole.

The upper end surface of the die cavity of the die 24 is provided with material guide chamfers.

In the utility model, the die 24 is fixed, and the forming forces of the other two workpieces are all independently adjustable, and can act and apply pressure according to preset programs. The upper end surface of the cavity of the concave mold is chamfered with guide material, and the size of the chamfer D×45° and the gap C between the blank and the concave mold can be determined according to the type and thickness of the workpiece. The metal blank 23 and the anti-jack block 26 move down under the action of the punch 22 until the anti-jack block 26 presses against the backing plate 27 of the die, and the material flows and fills the section of the metal blank 23 to form a smooth surface, realizing the whole finishing process.

The utility model adopts a novel deformation mechanism, and can establish two-direction compressive stress in the closed cavity of the die under the condition of using the reverse jacking block, so as to realize the finishing of the closed cavity, improve the smoothness of the workpiece section, and reduce the slump angle of the workpiece surface Advantages, the finishing mold has a simple structure and is easy to maintain.

The finishing mold of the present utility model realizes finishing method is:

As shown in Figure 3a-Figure 3c, including steps:

First, put the metal blank between the punch and the die, and let the metal blank partly enter the cavity of the die guide;

Then, the punch presses the metal blank into the die, and the reverse jacking block is in the reverse pressure state at the same time, and the metal blank and the reverse jacking block move down under the action of the punch until the reverse jacking block is pressed against the backing plate of the die, The material flows and fills the blank section to form a smooth surface, realizing the entire finishing process.

Specifically include:

a) Feeding, that is, feeding the metal blank 23 into the material guide chamfer of the die 24, and it is in a state to be processed.

b) Finishing, the punch 22 and the anti-jack block 26 descend until they are pressed against the backing plate 27 of the die, the anti-jack 25 is in the state of maintaining pressure, and enters the finishing process. At this time, the metal blank 23 is on the punch 22, The internal deformation of the closed cavity formed by the anti-jack block 26 and the die 24 makes the blank 23 fill outwards at the section, forming a smooth section surface, reducing the slump angle of the lower end surface of the blank, and obtaining a good finishing technical effect.

C) The material is returned, the punch 22 is moved back to its position, the anti-jack block 26 is moved up to eject the formed workpiece 23, the workpiece 23 is separated from the cavity of the die 24 and suspended on the upper surface of the anti-jack block 26, and the whole finishing process is completed.

The advantage of the present invention is that finishing can be achieved using closed cavities.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (3)

1. A finishing mould, comprising a punch and a die, the outside of the punch is provided with a fixed plate, it is characterized in that, the cavity inside of the die is provided with a reverse top block, and the bottom of the reverse top block is With anti-ejector. 2. The finishing mold according to claim 1, characterized in that, a die backing plate is provided below the die, a guide hole is provided on the die backing plate, and the reverse ejector pin is inserted into the in the guide hole. 3. The finishing mold according to claim 1 or 2, characterized in that, the upper end surface of the cavity of the concave mold is provided with material guide chamfers.

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