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 of shearing, punching/cutting/compounding, folding, riveting, splicing and forming metal plates (usually less than 6mm) (such as automobile bodies). Its remarkable feature is that the thickness of the same part is consistent.
Extended data
Top coat is divided into single-layer paint and multi-layer paint, which is a color fixing layer and a decorative protective layer. Single-layer paint is commonly known as plain paint, also known as ordinary paint, and can be completed in one layer.
Multi-layer paints are divided into silver powder series paints and pearlescent series paints, which are completed in two-layer and multi-layer construction procedures. Silver powder paint adopts special aluminum material, which has high protection, strong outdoor stability and strong observability. Pearl series paint is made of mica and shells through high technology, which is a kind of high-grade paint with rich colors and strong decoration.
The spraying quality of topcoat is very high. It is not easy to be clean, plump, bright, not sagging, not hanging flowers, uniform luster, not leaking flowers, not flashing flowers, good leveling, not biting, not impetuous, not color cast. It's really not easy to accomplish these things in one go, which requires extremely rich experience and troubleshooting ability.
References:
Baidu encyclopedia-car body panel repair and painting