A kind of preparation method of workpiece

Abstract

The invention provides a method for preparing a workpiece, comprising: placing a base material in a first mold and preforming it under a first condition to obtain a preform; the first mold includes a cavity with a first shape, and the The surface of the preform is matched with the first shape; the preform is placed in a second mold and shaped under a second condition to obtain a workpiece; the second mold includes a cavity with a second shape, the The workpiece surface matches the second shape; the first shape forms a second shape under a second condition. The invention provides a method for improving the uniformity of the wall thickness of the prepared box-shaped workpiece, so that the right-angled corner is not damaged and the thickness difference with other parts is reduced. Improving the uniformity of the wall thickness of the workpiece can reduce the cracking of the workpiece due to uneven wall thickness, and at the same time improve the overall mechanical properties of the shell.

Description

technical field [0001] The invention relates to the field of material processing and preparation, in particular to a method for preparing a workpiece. Background technique [0002] In the thermoforming process of box-shaped workpieces, due to various product shapes, extreme deformation factors such as corners and dead corners, during the mechanical stamping process of the plate, the material elongation rate at the sharp corners of the product is too large, resulting in a sharp thinning of the wall thickness, and the material Severe thinning occurs in parts of non-uniform flow, and the wall thickness shows obvious non-uniformity. This difference in wall thickness will cause some parts to crack and leak before the molding is completed, affecting product quality. [0003] In order to solve the above-mentioned technical problems, the processing method in the prior art is to place the plate in the mold, heat it first, and then pass in the gas, and the material is stretched and s...

AI Technical Summary

Problems solved by technology

[0004] However, this method will still cause non-uniform stretching of the material, so it will show non-uniform thinning, and the extended part is easily broken due to excessive extension

As a result, there will be severe thinning or cracking at the corners

The disadvantage of this molding solution is that the material cannot be uniformly thinned, and the corners cannot be compensated by the material, so the material at the corners becomes thinner sharply, and the uniformity of the overall product wall thickness is poor, which affects the manufacture of finished products and the quality of finished products

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