Sheet metal has the characteristics of light weight, high strength, electrical conductivity (can be used for electromagnetic shielding), low cost, and good mass production performance. It has been widely used in electronics, telecommunications, automotive industry, medical equipment and other fields. In computer cases, mobiles phoness, and MP3s, sheet metal is an essential component. With the increasing application of sheet metal, the design of sheet metal parts has become an important part of the product development process. Mechanical engineers must be proficient in designing sheet metal parts so that the designed sheet metal can meet the requirements of the product. Functional and appearance requirements can also make the manufacture of stamping dies simple and low cost.