Cold stamping method for box-shaped metal plate part with inward flange on periphery

Abstract

The invention relates to a cold stamping method for a box-shaped metal plate part with inward flange on the periphery, which comprises the steps of plate cutting for baiting, corner cutting and deep drawing, inward 90-degree bending of periphery and side hole punching, and periphery flanging, wherein in the step of plate cutting for baiting, the metal plate is cut according to the length and width of the developed outline of the finished box-shaped metal plate part to obtain the blank of which the length and width of the developed outline are identical to those of the finished box-shaped metal plate part; the blank enters the step of corner cutting and deep drawing to respectively realize corner cutting and deep drawing, the physical dimensions of the four corners of the blank are identical to those of the four corners of the finished box-shaped metal plate part after corner cutting, and the semi-finished box-shaped part is obtained after deep drawing; and the semi-finished box-shapedpart, which is processed by corner cutting and deep drawing, orderly and directly enters the step of inward 90-degree bending of periphery and side hole punching, and the step of periphery flanging, thereby obtaining the finished box-shaped metal plate part. The invention has the advantage of simple processing technique, saves the raw materials and energy consumption, enhances the production efficiency and lowers the production cost.

Description

technical field [0001] The invention relates to a cold working process of a sheet metal part, in particular to a cold stamping method of a box-shaped sheet metal part with its four sides folded inward. Background technique [0002] The box-shaped sheet metal parts are mainly used for the top cover of the air conditioner external unit. The purpose of the inward folding is to fold the punched section and sharp edges to the inside of the part to prevent sharp edges from hurting people. [0003] In the traditional stamping process of box-shaped sheet metal parts that are folded inward on all sides, material accumulation and elongation exist at the corners of the four sides after deep drawing, and the inward folding can only be performed after cutting four sides and four corners. Therefore, the processing technology of the traditional box-shaped parts with edges folded inwards at least includes shearing, corner cutting, deep drawing, cutting four straight sides, cutting four corn...

AI Technical Summary

Problems solved by technology

Because the traditional process exists in the process of shearing blanking and corner cutting and deep drawing, the blanking size of the blank is large, and its length, width and four corners are larger than the length and length of the developed contour of the finished box-shaped part that is folded inward. Width dimension, and four corner profile dimensions, so there is material accumulation and elongation at the corners around after deep drawing, and it is necessary to cut four sides and four corners, the processing procedure is complicated, and the energy consumption and material consumption are large and other shortcomings

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