Sheet metal processing is called sheet metal processing. For example, the use of sheet metal to make chimneys, iron drums, fuel tanks, oil tanks, ventilation ducts, elbows, rounded places, funnel shapes, etc. The main processes are cutting, bending and buckling, bending, welding, riveting, etc. Certain geometric knowledge. Sheet metal parts are thin sheet metal parts, that is, parts that can be processed by stamping, bending, stretching, etc. A general definition is parts with constant thickness during processing. Corresponding to castings, forgings, machining parts, etc.