Up to now, there is no complete definition of sheet metal. According to a definition in foreign professional journals, it can be defined as: sheet metal is a comprehensive cold working process for metal plates (usually less than 6mm), including cutting, punching/cutting/compounding, folding, welding, riveting, splicing and forming (such as automobile body). Its remarkable feature is that the thickness of the same part is consistent.

Generally speaking, the basic equipment of a sheet metal factory includes shearing machine, CNC punch, laser, plasma, laser (plasma)/water jet cutter/combiner, bender, uncoiler, straightener, deburring machine, spot welder and other auxiliary equipment.

Generally, the three most important steps in a sheet metal factory are cutting, stamping/cutting and folding.

Metal sheet is sometimes called metal sheet, which comes from English platemetal. Generally speaking, some metal plates are plastically deformed by manual or die stamping to form the required shape and size, and more complex parts, such as chimneys, tin furnaces and automobile shells, can be formed by welding or a small amount of mechanical processing.

Sheet metal processing is called sheet metal processing. Specifically, such as making chimneys, iron drums, oil tanks, oil pots, ventilation pipes, elbows, gardens, funnels, etc. For plates, the main processes are cutting, bending, forming, welding, riveting and so on. This requires a certain knowledge of geometry. Sheet metal parts are sheet metal parts, that is, parts that can be processed by stamping, bending and stretching. The general definition is-parts with constant thickness during machining. Corresponding parts include casting parts, forging parts, machining parts, etc. For example, the iron shell outside the car is a sheet metal part, and some cabinets made of stainless steel are also sheet metal parts.