Metal stampings are the most commonly used parts in metal processing and machinery manufacturing. The stamping part processing is a processing method that uses a die to separate or shape the metal strip. Its application range is very broad. The materials processed by metal stamping parts are mainly hot-rolled or cold-rolled (mainly cold-rolled) metal strip materials, such as carbon steel plates, alloy steel plates, spring steel plates, galvanized plates, tinned plates, stainless steel plates, copper and copper Alloy plates, aluminum and aluminum alloy plates, etc. Introduce the sliding line method of metal stamping parts today:
The basic assumption of the slip line method is: the thickness of the sheet flange is unchanged, and it is in a plane strain state, the material is isotropic, no hardening, and the influence of friction force distribution on plastic flow is not considered. There are three common basic methods.
Geometric mapping method:
This method was first proposed by R. Sowerby et al. They believed that it is possible to realize the mapping of workpieces to blanks based on certain assumptions without considering boundary conditions such as deformation force, stress-strain relationship and boundary friction.
This method is mainly based on some empirical calculation formulas, so its application range is affected. It is mainly applied to malleable stamping parts with relatively simple shapes (such as rotating shaped parts, curved parts, or stamping parts composed of these simple shapes). In general, the method of unfolding the freeform surface of plate parts by experience is a method of a piece of nature, and its accuracy is affected by many factors such as the richness of user experience, the empirical formula used, and the choice of specific process parameters. Its accuracy needs to be further improved.
The simulation method is based on certain assumptions, based on the similarity of the mathematical description of many physical problems, through the mathematical similarity theory, using a model composed of other physical media to simulate the metal flow of the sheet flange. Laplace and Poission equations are widely used in sheet metal forming.
Stamping parts processing includes blanking, bending, deep drawing, forming, finishing and other processes. The materials processed by stamping parts are mainly hot-rolled or cold-rolled (mainly cold-rolled) metal strip materials, such as carbon steel plates, alloy steel plates, spring steel plates, galvanized plates, tinned plates, stainless steel plates, copper and copper alloy Plate, aluminum and aluminum alloy plate, etc. Rockwell hardness tester is used for hardness testing of metal stampings. Small, stamped parts with complex shapes can be used to test small planes and cannot be tested on ordinary desktop Rockwell hardness testers.