Formability of metal stamping materials

Formability of metal stamping materials

　　The metal stamping parts of materials refer to the adaptability of materials to various stamping processing methods. For example, it is easy to process, easy to obtain high-quality and high-precision metal stamping parts, high production efficiency (the limit deformation degree of a stamping process and the total limit deformation degree are large), the mold consumption is low, and it is not easy to produce waste products. The stamping performance of sheet metal is a comprehensive concept. Whether metal stamping parts can be formed and the quality after forming depends on the forming limit (resistance to cracking), moldability and shape freezing.

　　Forming limit refers to the maximum degree of deformation that can be achieved during the sheet metal forming process, under which the material does not break. It can be considered that the forming limit is the fracture resistance of the material during stamping and forming. The better the forming performance of the material, the better the fracture resistance of the material, and the higher the forming limit.

　　The moldability of the material refers to the ability of the sheet metal to obtain the shape of the mold during the stamping process. Shape freezing refers to the ability of a part to maintain the shape obtained in the mold after demolding. There are many factors that affect the moldability, and geometric defects such as introversion, warping, collapse and bulging during the forming process will reduce the moldability. The most important factor affecting shape freezing is springback. After parts are demolded, large shape errors are often caused by excessive springback.

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