Multipoint forming die based on solid particle medium back pressure

Abstract

The invention relates to a multipoint forming die based on solid particle medium back pressure, which comprises a lower die holder, a top bar, a cushion block, a female die, a pressure plate, an air cylinder, a sizing block, a supporting plate, bolts, an upper die holder, a male die, a solid particle bottom die and the like. During die assembly and manufacturing, solid particles are used as the flexible forming bottom die and are filled in a bottom die cavity among the female die, a top block and a blank. Compared with liquid medium back pressure, by using the solid particle medium back pressure, the formation can be realized very easily, no special equipment is required, the leakage can be effectively avoided by using the solid particles, the environment is not polluted and the safe and reliable production can be realized. The solid particle medium back pressure can realize non-even back pressure, can effectively improve panel veneer deformation extent and can enable the thickness of the product to be evenly distributed. Since the solid particle bottom die is used as the flexible bottom die and the shape of the solid particle bottom die can be adjusted through the shape of the cushion block according to needs, the product quality is higher. Since the male die can be adjusted and varied according to the shape of the product, the die is particularly suitable for new product trial production and small and medium mass production.

Description

Technical field [0001] The invention belongs to stamping die technology, and specifically relates to a multi-point forming die based on solid particle medium back pressure, mainly a flexible bottom die and a multi-point forming die that provide solid particle medium back pressure. Background technique [0002] In the traditional multi-point forming rigid mold deep drawing process, the forming thickness of the sheet metal is uneven and the forming quality is poor. Forming molds that use liquid media such as oil or water to achieve back pressure are characterized by uniform pressure distribution, but the uniform pressure distribution is not conducive to the thickness control of the formed part. Once the sheet material is locally thinned during the forming process, it will easily occur Cracking phenomenon. In addition, during the back pressure forming process of the liquid medium, the sealing is difficult to solve, it is easy to cause pollution and the production is unsafe. Summar...

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Problems solved by technology

[0003] The present invention aims at the liquid medium back pressure mold of the existing mold, its sealing problem is difficult to solve and the back pressure uniform problem, provides a multi-point molding mold and method based on the back pressure of the solid particle medium, so as to realize non-uniform back pressure forming, Adjust the shape of the pad to improve the forming quality and solve the sealing problem

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