Inner high-pressure formation process with low pressure source

A technology of internal high-pressure forming and low-pressure source, which is applied in the field of low-pressure source internal high-pressure forming, and can solve the problems of high-pressure source equipment being expensive, easily polluted, and affecting production efficiency

Inactive Publication Date: 2003-09-10
长春汽车材料研究所
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Since the high-voltage source needs to generate a very high internal pressure, which generally requires more than 40-100 MPa, the requirements for the components of the high-voltage source are extremely high, so the high-voltage source equipment is expensive, and the control system is also very complicated, which affects production efficiency.
In addition, since the liquid is easily polluted after entering the inner cavity of the blank, it must be purified before it can be recycled.
All of these seriously restrict the development of internal high pressure forming technology

Method used

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  • Inner high-pressure formation process with low pressure source
  • Inner high-pressure formation process with low pressure source
  • Inner high-pressure formation process with low pressure source

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Embodiment Construction

[0006] The forming method of the present invention will be described in detail below by taking forming a hollow revolving member as an example.

[0007] Such as figure 1 As shown, the workpiece blank of the embodiment is hollow. Barrel-shaped rotary body and shaped rotary body parts.

[0008] Such as figure 2 As shown, the whole mechanism is composed of booster piston 1, feeder 2, die 3, water 4 and so on. The barrel-shaped workpiece blank (see figure 1 ) into the separable die 3, add water 4 into the workpiece blank, there is a through hole in the center of the feeder 2, and a booster piston 1 is installed inside, the lower end enters the workpiece blank, the upper end is slippery with the die 3, and the middle The boss A is pressed against the end of the workpiece blank. Feeder 2 upper end pressure P 1 On the one hand, it is to increase the sealing performance, and on the other hand, it can also compensate for the metal required during the deformation process of the w...

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Abstract

The present invention provides an inner high-pressure formation process with low pressure source. One pressurizing piston with small diameter is acted by one low pressure source to enter one totally enclosed metal blank cavity filled with liquid to produce inner high pressure inside liquid to deform the metal blank. By means of the restriction of outer mold to wrap the metal blank, required shape and sizes are reached. The low pressure source and the inner liquid pressure are controlled via controlling the diameter, feeding rate and feeding distance of the pressurizing piston. The present invention has the features of low production cost, simple equipment and no medium purifying step.

Description

(1) Technical field [0001] The invention relates to an internal high pressure forming method, in particular to a low pressure source internal high pressure forming method. (2) Background technology [0002] With the development of the automobile, aviation and aerospace industries, the requirements for parts are getting higher and higher. It has become a trend to replace beams, brackets and other parts with high-strength and low-weight hollow parts. And born. At present, the internal high pressure forming method mainly uses a high-pressure pump to inject liquid into the sealed metal blank cavity, so that the metal blank is deformed under the feeding and internal high pressure, and the expected shape and size are achieved by the constraints of the external mold. Since the high-voltage source needs to generate a very high internal pressure, which generally requires more than 40-100 MPa, the components of the high-voltage source are extremely demanding. Therefore, the high-volt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/02
Inventor 朱伟成徐成林张玉成李海平王广盛李文成
Owner 长春汽车材料研究所
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