Stamping and local hydraulic compound forming method suitable for large automobile covering parts

Abstract

The invention discloses a stamping and local hydraulic compound forming method suitable for large automobile covering parts. The method comprises the steps of selecting small characteristic regions needing hydraulic forming through simulating calculation; setting the hydraulic forming direction according to the characteristic shapes; establishing a stamping and local hydraulic compound forming die profile; decomposing part forming into the two continuous process of stamping forming and local hydraulic forming in the forming process; in the stamping forming process, obtaining the overall shapes of the covering parts through the traditional stamping mode; forming various small characteristics on the covering parts through local hydraulic forming. According to the method, the forming quality of the local small characteristics can be effectively improved, and the forming efficiency is higher compared with traditional hydraulic forming.

Description

technical field [0001] The invention relates to a compound forming method which combines traditional stamping forming and hydraulic forming in one forming process. Background technique [0002] With the rapid development of aviation, automobile and other industries, aluminum alloys, high-strength steel plates and other materials are widely used, which greatly increases the forming of large-scale covering parts with high precision requirements, large size, deep drawing depth and local complex features. difficulty. Stamping forming is currently the main method of forming large-scale panels. This method applies pressure to the material through a mold installed on a press to cause plastic deformation to obtain the desired shape of the part. This method has high processing efficiency, but it is often prone to cracking or wrinkling when forming for local complex features. Hydroforming realizes the forming of sheet metal by using liquid as a force transmission medium, which can e...

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Problems solved by technology

This method has high processing efficiency, but it is often prone to cracking or wrinkling when forming for local complex features

Hydroforming realizes the forming of sheet metal by using liquid as a force transmission medium, which can effectively improve the formability of aluminum-magnesium alloys, titanium alloys and other materials, and can form parts with very complex shapes, but this method faces deep drawing depth, When large-sized parts are formed, the liquid filling time is long, the efficiency is low, and the required hydraulic pressure is high, which requires high sealing performance of the mold clamping

[0003] When large-scale cover parts are stamped and formed, often due to the complex shape of the part, the fluidity of the material during stamping is insufficient, so it is easy to crack or wrinkle locally

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