Sheet metal processing is a type of processing that applies external force to a thin metal plate and deforms it. When metal is subjected to external force, it will deform. Once the external force is stopped, the metal will instinctively try to return to its original shape. This is called elastic deformation. When the applied force reaches a certain critical value (yield point), the metal will It cannot be restored to its original shape, this state is called plastic deformation. Sheet metal processing is a processing technology that obtains the desired shape under the condition of plastic deformation of metal. Sheet metal is a comprehensive cold working process for sheet metal (usually less than 6mm). Sheet metal processing includes shearing, stamping, cutting, compounding, folding, riveting, splicing, forming, surface treatment, etc.