Modern sheet metal processes include: filament windings, laser cutting, heavy duty machining, metal bonding, metal drawing, plasma cutting, precision welding, roll forming, sheet metal bending, die forging, and water jet cutting. In 3D software, SolidWorks, UG, Pro/E, SolidEdge, TopSolid and so on all have sheet metal parts, which mainly include the data required for sheet metal processing (such as unfolding, bending, etc.) through editing of 3D graphics. And provide data for CNC Punching Machine/Laser, Plasmajet, Waterjet Cutting Machine/Combination Machine, and CNC Bending Machine. The basic equipment of the sheet metal factory generally includes Shear Machine, CNC Punching Machine/laser, Plasma, Water Jet Cutting Machine, and Combination Machine. Bending Machine and various auxiliary equipment such as: unwinding machine, leveling machine, deburring machine, spot welding machine, etc. Sheet metal has not yet had a complete definition up to now. According to a definition in a professional journal, it can be defined as ”Sheet metal is for thin sheet plates (usually below 6mm) a comprehensive cold processing technology, including shearing, punching/cutting/laminating, folding, riveting, splicing, forming (such as car body).” Its remarkable characteristic is identical to the thickness of the parts. 1, the sheet metal with light weight, high strength, conductive (can be used for electromagnetic shielding), low-cost, large-scale production performance and so on, in electronic and electrical appliances, communications, automotive industry, medical equipment and other fields have been widely used, such as computer chassis, mobile phones, MP3, sheet metal is an essential component. 2, sheet metal design has become a very important part of the product development process, mechanical engineers must be proficient in sheet metal design skills, so that the design of the sheet metal to meet the product's function and appearance requirements, but also to make stamping die simple, low-cost.