Sheet metal is a comprehensive cold working process for metal sheets (usually below 6mm). Through shearing, punching, cutting, compositing, folding, riveting, splicing, forming (such as car body), and other processing methods, the metal sheet can be processed into various shapes, then used in rapid prototyping manufacturing and products development.

As the application of sheet metal becomes more and more extensive, the design of sheet metal parts has become an essential part of the product development process. Mechanical engineers must be proficient in the design skills of sheet metal parts so that the design of sheet metal meets the requirements of the product. The conditions of function and appearance can make stamping die manufacturing simple and low cost.