Sheet bending and forming mould and method

Abstract

The invention relates to sheet bending and forming mould and method. The forming mould comprises a die, a terrace die and an eccentric swage arranged between the die and the terrace die; the shape of the forming face of the terrace die is the shape of a bent finished workpiece; the die comprises a first sub die, a second sub die and a third sub die; the three sub dies are respectively matched with the eccentric swage and the terrace die to carry out three-time mould pressing on a sheet; the first sub die has a die orifice and comprises a first wrap angle part and a transition section transiting to the bottom of the first sub die from the first wrap angle part; the first wrap angle part limits the die orifice and corresponds to the convex corner edge of the finished workpiece in shape; thesecond sub die has an inner side wall corresponding to the side of the finished workpiece; and the third sub die comprises a second wrap angle part corresponding to the convex corner edge of the finished workpiece in shape and an inner side wall extending along the shape of the side of the finished workpiece form the second wrap angle part. The sheet bending and forming mould and the forming method can reduce wrinkling during sheet bending and improve the sheet forming yield.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a plate bending forming die and method. Background technique [0002] At present, mechanical processing and forming technology has become more and more mature, and various mechanical parts can be manufactured through mold forming technology. For example, automotive beam components are usually formed using molds, common automotive beam components such as "U" beams. The forming process plan of the "U" beam is: blanking, punching, and bending forming. When the sheet is bent, it needs to be molded and formed. [0003] Some beam parts are formed by drawing, which can control the forming of beam parts to a certain extent, but the disadvantage is that it wastes materials and the material utilization rate is not high. For parts with large production batches, the cost The improvement is large, and the subsequent trimming process is generally very complicated. However, if ...

AI Technical Summary

Problems solved by technology

Moreover, the sidewalls of the two molded parts 27 are prone to indentations after the molding is completed, which ultimately leads to a low product yield

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