Sheet metal is a comprehensive cold processing process for sheet metal, including shear, punching/cutting/composite, folding, riveting, splicing, and forming, sheet metal also has certain characteristics.
Sheet metal process characteristics
Sheet metal has the characteristics of lightweight, high strength, electric conductivity (can be used for electromagnetic shielding), low cost, good mass production performance, etc., in electronic appliances, communications, automotive industry, medical equipment, and other fields have been widely used, such as in computer cases, mobile phones, MP3, sheet metal is an essential part. With the application of sheet metal more and more widely, sheet metal parts design has become a very important part of the product development process, mechanical engineers must master the design skills of sheet metal parts, to make the design of sheet metal not only meet the function and appearance of the product requirements but also make the stamping die manufacturing simple, low cost.
There are many sheet metal materials suitable for stamping processing. Sheet metal materials widely used in the electronic and electrical industry include:
SPCC refers to the steel ingot that is continuously rolled into a steel coil or sheet material of required thickness by a cold rolling machine. SPCC surface without any protection, exposure to the air is easy to be oxidized, especially in the humid environment, the speed of oxidation, dark red rust, in use to spray paint, electroplating or another protective surface.
Galvanized steel plate SECCSECC base material for the general cold rolled steel coil, in the continuous electric galvanized production line after degreasing, pickling, electroplating, and various post-processing process, that is, electric galvanized products. SECC not only has the mechanical properties and similar machinability of ordinary cold-rolled steel sheets but also has superior corrosion resistance and decorative appearance. In the electronic products, home appliances and furniture market have great competitiveness and substitution. For example, SECC is commonly used in computer cases.
Hot-dip galvanized steel SGCC hot-dip galvanized steel coil refers to the hot pickling or cold rolling semi-finished products, after cleaning, annealing, immersed in the temperature of about 460°C melt zinc tank, and the steel plated with zinc layer, and then by conditioning leveling and chemical treatment. SGCC material is harder than SECC material, has poor ductility (avoiding deep pumping design), a thicker zinc layer, and poor weldability.
The content of stainless steel SUS301Cr(chromium) is lower than that of SUS304, the corrosion resistance is poor, but after cold processing can obtain good tension and hardness, good elasticity, mostly used for spring and anti-EMI.
Stainless steel SUS304 is used as one of the most widely used stainless steel because it contains Ni(nickel) than Cr(chromium) steel is rich in corrosion resistance, and heat resistance, has very good mechanical properties, no heat treatment hardening phenomenon, no elasticity.
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