A stretching process for the rear beam of the high-strength plate of the automobile chassis

Abstract

The invention provides an automobile chassis high-strength plate rear beam drawing process. The drawing process includes the steps of firstly, mounting a high-strength plate on a cavity, and fixing the high-strength plate with a transverse plate; secondly, punching the high-strength plate for drawing, and performing drawing at least four times on the rear beam high-strength plate; thirdly, stripping a die when the rear beam of the high-strength plate is formed by drawing. The method has the advantages that the rear beam of the high-strength plate is punched and drawn at least four times, cracks, caused by the strength of punching and drawing, at the upper surface drawn parts of the high-strength plate, due to the fact that the gap between the surface of the cavity and the high-strength plate is at least 2cm, the wrinkle angle on the surface of the rear beam of the high-strength plate during drawing is smaller than 90 degrees by at least four times of punching and drawing, rejection rate is reduced, and production cost is lowered.

Description

technical field [0001] The invention relates to a stretching process in the field of automobiles, in particular to a stretching process for a rear beam of a high-strength plate of an automobile chassis. Background technique [0002] The existing stretching process of the rear beam of the high-strength plate of the automobile chassis is: workpiece installation, one-time stamping and stretching, and mold release. The problems of this process are: 1) One-time stamping and forming can easily lead to cracks on the upper surface of the high-strength plate, causing damage to the workpiece; 2) Due to one-time stamping and stretching, the stretched high-strength plate back beam The wrinkle angle of the surface will be greater than 90°, affecting its performance. Contents of the invention [0003] Aiming at the above-mentioned deficiencies, the present invention provides a high-strength plate rear beam stretching process for automobile chassis, by stamping and stretching the high-s...

AI Technical Summary

Problems solved by technology

The problems of this process are: 1) one-time stamping and forming, it is easy to cause cracks on the upper surface of the high-strength plate, causing damage to the workpiece; 2) due to one-time stamping and stretching, the stretched high-strength plate back beam The wrinkle angle of the surface will be greater than 90°, affecting its performance