Sheet metal is a comprehensive cold-working process for sheet metal (usually below 6mm), including shear, punch/cut/composite, folding, welding, riveting, splicing, and forming (such as car bodies). Its distinguishing feature is the uniform thickness of the same part. The products processed through the sheet metal industry are called sheet metal parts. The sheet metal parts referred to by different industries are generally different and are often used for the designation of assembly.

Sheet metal material

There are many sheet metal materials suitable for stamping processing. Sheet metal materials widely used in the electrical and electronic industry include:

1. Ordinary cold rolled sheet SPCC

SPCC refers to the continuous rolling of steel ingots into a coil or sheet steel of a desired thickness through a cold rolling mill. SPCC surface without any protection, exposed to the air can easily be oxidized, especially in the humid environment, the oxidation speed, the emergence of dark red rust, in the use of the surface to be sprayed, electroplated or other protection.

Galvanized steel sheet SECC

The base material of SECC is a general cold-rolled steel coil. After the continuous electro-galvanized production line is degreasing, pickling, electroplating, and various post-treatment processes, it becomes an electro-galvanized product. SECC not only has the mechanical properties and similar processability of ordinary cold rolled steel sheets, but also has superior corrosion resistance and decorative appearance. In the electronic products, home appliances and furniture market has great competitiveness and replaceability. For example, the computer chassis is commonly used SECC.

3. Hot dip galvanized steel sheet SGCC

Hot-dip galvanized steel coil refers to the hot-rolled pickled or cold-rolled semi-finished products. After cleaning and annealing, it is immersed in a molten zinc bath at a temperature of about 460° C., and the steel sheet is plated with a zinc layer and then subjected to quenching and tempering. Leveling and chemical treatment. SGCC material is harder than SECC material, poor in ductility (to avoid deep drawing design), thicker zinc layer, and poor weldability.

4. Stainless steel SUS301

The content of Cr (chromium) is lower than that of SUS304, and the corrosion resistance is poor. However, after cold working, good tensile strength and hardness can be obtained, and the elasticity is good. The Cr (chromium) is mostly used for springs with springs and anti-EMI.

5. Stainless steel SUS304

One of the most widely used stainless steels is richer in corrosion resistance and heat resistance than Ni (nickel)-containing steels than Cr (chromium)-containing steels. It has excellent mechanical properties, no heat treatment hardening, and no elasticity.