Sheet metal processing includes stamping sheet metal and bending sheet metal. Stamping sheet metal is a manufacturing process used for metal parts with curved surfaces, double curved surfaces, and polyhedra, such as car door panels, machine covers, and chassis. Some flat, single arc, single arc multi face, and continuous bending processes of bent sheet metal needles are used to produce sheet metal handboards and products with 3D to 2D data provided by customers through laser cutting, punching, and bending machine processing.