A comprehensive cold working process for thin metal sheets (usually under 6mm) is sheet metal.
Sheet metal is characterized by light weight, high strength, electrical conductivity (capable of being used for electromagnetic shielding), low cost, and good performance in mass production, and is widely used in the fields of electronics and electrical appliances, communications, the automotive industry, and medical equipment, for example, sheet metal is an indispensable component of computer cases, cell phones, and MP3s. Sheet metal, according to a definition in a foreign professional journal, can be defined as follows: sheet metal is for sheet metal (usually below 6mm) a comprehensive cold working process.
With the increasing application of sheet metal, the design of sheet metal parts has become an important part of the product development process, mechanical engineers must be skilled in the design of sheet metal parts of the design skills, so that the design of the sheet metal to meet the functionality of the product and the appearance of the requirements of the product, but also to make the stamping die manufacturing is simple, low-cost.
The main use of sheet metal
1, ordinary cold rolled plate SPCC
SPCC is a steel ingot through the cold rolling mill continuously rolled into the required thickness of steel coil or sheet. SPCC surface without any protection, exposed to the air is highly susceptible to oxidation, especially in the humid environment oxidation speed, the appearance of dark red rust. Appear dark red rust, in the use of the surface to paint, plating or other protection.
2, galvanized steel SECC
SECC substrate for the general cold rolled steel coils, in the continuous zinc plating production line after degreasing, pickling, plating and various post-treatment process, that is, become an electro-galvanized products. SECC not only has the mechanical properties of the general cold rolled steel sheet and similar processability, but also has a superior corrosion resistance and decorative appearance. In the market of electronic products, home appliances and furniture, SECC has great competitiveness and substitutability. For example, computer chassis commonly used is SECC.
3, hot dip galvanized steel SGCC
Hot dip galvanized steel coil is the hot rolled pickled or cold rolled semi-finished products, after cleaning, annealing, immersed in a temperature of about 460 ° C molten zinc tank, so that the steel sheet plated with zinc, and then by the tempering of the leveling and chemical treatment and become. SGCC material is more than the hard SECC material, SGCC material is harder than SECC material, has poor ductility (avoiding deep drawing design), thicker zinc layer, and poor weldability.