Sheet metal parts are products manufactured by sheet metal technology. We cannot live without sheet metal parts everywhere. Sheet metal parts are made by filament power winding, laser cutting, heavy machining, metal bonding, metal drawing, plasma cutting, precision welding, roll forming, bending of metal sheet, die forging, and water jet cutting.

A definition in a foreign professional journal can define sheet metal as: sheet metal is a comprehensive cold working process for thin metal plates (usually below 6mm), including shearing, punching / cutting / compositing, folding, welding, riveting, and splicing , Forming (such as car body) and so on. Its distinctive feature is the same thickness of the same part.