Metal sheet metal part mirror image free mold machining method

Abstract

The invention relates to a metal sheet metal part mirror image free mold machining method. The method comprises the following steps that 1, a rectangular plate material is fixed on a forming machine tool, and the two diagonal lines of the plate material divide the plate material into four regions; 2, a middle configuration is formed through a single forming tool for a first process, and the surface area of the middle configuration is 40-60% of the surface area of the final metal sheet metal part; when the tool head of the forming tool moves to a certain region of the plate material, the clamping force of a flexible clamp corresponding to the area plate material is reduced; and 3, the two forming tools are used for carrying out mirror image free mold forming on the plate materials at the same time and a final shape is formed for a second process, and the tool head of the lower forming tool is always located in the normal direction of the contact point of the tool head and the plate material. According to the method, a special mold is not needed, the machining period is short, the innovation design requirements of modern social products can be met, and the method has a good development prospect in the fields of rapid prototyping manufacture and new vehicle model exploitation.

Description

technical field [0001] The invention relates to a method for processing a mirror image of a metal sheet metal part without a mold, and belongs to the technical field of manufacturing the metal sheet metal part. Background technique [0002] Sheet metal products processed by sheet metal technology have been widely used in the automotive industry, aerospace, medical equipment, daily hardware and other industries due to their high strength, light weight, low cost, and the ability to achieve large-scale production. [0003] In recent years, with the rapid development of the national economy, modern society requires increasingly diversified and individualized products, continuous innovation in product design, and accelerated replacement. In this environment, product production has tended to develop towards small batches and multiple varieties, while the traditional stamping process has lost its advantages in the production of personalized products due to the constraints of long m...

AI Technical Summary

Problems solved by technology

[0005] However, in the existing NC incremental forming process, the sheet material undergoes progressive thinning and drawing deformation during the forming process, resulting in a thinning of the sheet material thickness, and the wall thickness of the formed part is constrained by the sinusoidal law (ie In the formula, t is the thickness of the sheet after forming, t 0 is the sheet thickness before forming, is the angle between the forming surface of the sheet metal and the vertical direction, called the semi-cone angle), and it is impossible to form a steep side wall with uniform wall thickness.

In addition, according to the previous incremental forming process of sheet metal, the surrounding of the sheet metal is fixed by the pressure plate during processing, and the material cannot flow. When processing parts with large forming angles, the sheet metal will be excessively thinned or even cracked.

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