Workpiece flange forming method and mould

Abstract

The present invention discloses a workpiece flange forming method and mould. The workpiece flange forming method comprises a material pressing step and a forming step. In the material pressing step, a workpiece is pressed and a to-be-flanged part is exposed; in the forming process, a forming force is applied to one side of the to-be-flanged part and a supporting force which is smaller than the forming force is applied to the other side of the to-be-flanged part, so that the to-be-flanged part is gradually turned and folded towards an edge which is far away from the pressed part. Therefore, different from a manner of overturning the whole part of the to-be-flanged part in the prior art, the flaning process provided by the present invention is used for gradually turning and folding the to-be-flanged part, that is, the whole material of the to-be-flanged part is gradually subjected to once plastic deformation process from the pressed part in the turning and folding process, so that the residual stress to the to-be-flanged part is further eliminated and the to-be-flanged part can be flanged once with high quality; and the problems that a flanged edge is restored, and has folds and turning and folding line traces are solved, and the process is simple and ingenious.

Description

technical field [0001] The invention relates to the field of flanging forming of workpieces, in particular to a method of flanging forming of workpieces and a mold for realizing the method. Background technique [0002] In the field of manufacturing, many workpieces require flanging, especially sheet-shaped workpieces, such as vehicle body panels. In the conventional flanging dies, the parts to be flanged of the workpiece are stamped by forming tool pairs, that is, the parts to be flanged are simultaneously turned over during the stamping process to form the flanging. Among them, in the forming process, due to the certain rigidity and stress of the sheet metal, it will have a springback after the primary deformation, and then the second flanging and shaping are required. In the second flanging and shaping, flanging often occurs If the flanging height of the product is high, an arc surface will be generated on the flanging or the rebound of the formed product will still be l...

AI Technical Summary

Problems solved by technology

In order to overcome this problem, the usual method is to perform springback compensation, or to adjust the gap of the flanging for strong pressure, but even in this way, it is difficult to achieve the desired effect. At the same time, this method also increases the difficulty of mold debugging and processing More times will increase the processing cost of the mold, but it may not be able to achieve better results, resulting in poor processing efficiency and effect

Images