Metal stamping parts are the most commonly used parts in the fields of metal processing and machinery manufacturing. Stamping parts processing is the most common type of metal processing, using molds to separate or form metal strips. Its application range is very wide. Metal stamping parts processing materials are mainly hot-rolled or cold-rolled (mainly cold-rolled) metal strip materials, such as carbon steel plate, alloy steel plate, spring steel plate, galvanized plate, tin plate, stainless steel plate, copper and copper Alloy plate, aluminum and aluminum alloy plate, etc. Today, we introduce the slip line method of metal stamping parts:
The basic assumptions of the slip line method are: the thickness of the sheet flange is constant, 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 basic methods that are commonly used.
Geometric mapping method:
This method was first proposed by R. Sowerby et al. They believed that the mapping from the workpiece to the blank can be realized based on certain assumptions without considering boundary conditions such as deformation force, stress-strain relationship, and boundary friction.
Empirical method:
This method is mainly based on some empirical calculation formulas, so its application range is affected, and it is mainly applied to expandable stamping parts with relatively simple shapes (such as rotating parts, bending parts, or stamping parts composed of these simple shapes). Generally speaking, the method of developing the free-form surface of plate parts by experience in the processing of stamping parts in hardware processing is a makeshift method, and its accuracy is affected by the richness of user experience, the empirical formula adopted and the specific process parameters. Influenced by many factors such as selection, its accuracy needs to be further improved.
Simulation method:
The simulation method is based on the similarity of mathematical descriptions of many physical problems under certain assumptions, through mathematical similarity theory, and using models composed of other physical media to simulate the metal flow of sheet metal flanges. Laplace and Poission equations are widely used in sheet metal forming.
Stamping processing includes blanking, bending, deep drawing, forming, finishing and other processes. Metal stamping parts processing materials are mainly hot-rolled or cold-rolled (mainly cold-rolled) metal strip materials, such as carbon steel plate, alloy steel plate, spring steel plate, galvanized plate, tin plate, stainless steel plate, copper and copper Alloy plate, aluminum and aluminum alloy plate, etc. The hardness test of metal stamping parts adopts Rockwell hardness tester. Small stampings with complex shapes can be used to test the surface is too small to be detected on ordinary benchtop Rockwell hardness testers.
