Sheet metal has the characteristics of light weight, high strength, electrical conductivity (can be used for electromagnetic shielding), low cost, and good mass production. Widely used in electronic equipment, communications, automobiles, medical equipment, etc. In computer cases, mobile phones, and MP3, sheet metal is an indispensable part. With the increasing application of sheet metal parts, the design of sheet metal parts has become a very important link in the product development process. Mechanical engineers must have the skills to design sheet metal parts in order to make the designed sheet metal parts meet product requirements. The requirements for sheet metal design functions and appearance can make stamping die manufacturing simple and low-cost.

There are many sheet metal materials that can be used for stamping. Sheet metal materials commonly used in the electronics and electrical industry include:

⒈Conventional cold rolled sheet SPCC SPCC refers to the continuous rolling of steel ingots in a cold rolling mill into coils or plates of required thickness. The surface of SPCC is unprotected, and it is easy to oxidize when exposed to the air. Especially in a humid environment, the oxidation speed will increase and dark red rust will appear. The surface must be painted, galvanized or protected when used.

⒉ SECC galvanized steel sheet base material SECC is a cold-rolled steel coil, which becomes galvanized after degreasing, pickling, electroplating and various post-treatment processes in a continuous galvanizing production line product. SECC not only has mechanical properties and workability similar to conventional cold-rolled steel sheets, but also has excellent corrosion resistance and decorative appearance. It has strong competitiveness and substitutability in the electronic products, home appliances and furniture markets. For example, SECC is often used in computer cases.

⒊ Hot-dip galvanized steel sheet. SGCC hot-dip galvanized steel coil is a semi-finished product after hot-rolling and pickling or cold-rolling, refining, annealing, immersing in a molten zinc tank at about 460℃, and electroplating the steel plate. Then the zinc layer is hardened, leveled and chemically treated. SGCC material is harder than SECC material, has poor ductility (avoid deep drawing construction), thicker zinc layer, and poor weldability.

⒋ The chromium (chromium) content of SUS301 stainless steel is lower than that of SUS304, and the corrosion resistance is lower, but it can obtain good tensile strength and hardness after cold working, and has good elasticity. Mostly used for shrapnel. Spring and EMP resistant.

⒌ SUS304 stainless steel is one of the most widely used stainless steels. Because it contains Ni (nickel), it has better corrosion resistance and heat resistance than Cr (chromium) steel. It has good mechanical properties, no thermal hardening, and no elasticity.