The raw materials generally used for sheet metal processing include cold rolled steel plate, hot rolled steel plate, galvanized steel plate, copper copper, red copper, beryllium copper, aluminum alloy plate and stainless steel. According to the different efficacy of the commodity, the raw materials used are different. Generally, the main use and cost of the commodity should be considered. Sheet metal processing is the core technology that the technical staff of sheet metal parts must master, and it is the key process flow of sheet metal handicraft forming. Sheet metal processing includes traditional laser cutting, cold stamping production and processing, bending and pressing forming and other methods and main parameters of processing technology, as well as various cold stamping die structures and main parameters of processing technology, various machine equipment principles and control methods, as well as new stamping die technology and new technology and new process. The production and processing of metal sheet materials for parts is called sheet metal processing. Then, how to select sheet metal processing materials?
1. Galvanized sheet
The substrate of galvanized sheet is ordinary cold-rolled steel coil. After continuous phosphating production line goes through degreasing, pickling and passivation, electroplating process and various post-treatment processes, it becomes phosphating commodity. It not only has the physical properties and similar technological properties of ordinary cold-rolled steel sheets, but also has excellent corrosion resistance and decorative art appearance. It has great competition and substitutability in the sales market of electronic equipment, household appliances and furniture.
2. General cold-rolled steel plate
Cold rolled steel sheet means that the steel castings are continuously cold-rolled into thick steel sheet tubes or scraps of specified thickness through the cold rolling mill. There is no safety protection on the surface. Exposed to gas, it is very easy to be oxidized by air. Especially in the wet and cold natural environment, the air oxidation rate is accelerated, and there is dark red rust. During application, the surface needs spraying, electroplating or other safety protection.
3. Hot dip galvanized thick steel plate
Hot dip galvanized coil steel refers to the semi-finished products processed after hot pickling and passivation or cold rolling, cleaned and quenched, infiltrated into the solution zinc bath with a temperature of about 460 ° C, then the steel plate was inlaid with zinc layer, and then it was formed through heat treatment, leveling and organic chemical solution. Raw materials are harder than raw materials, with poor plasticity, thicker zinc layer and poor arc welding ability.
4. 304 stainless steel
As one of the widely used stainless steels, it has better corrosion resistance, temperature resistance and physical properties than the steel containing chromium due to its nickel content. It has no hardening and tempering treatment and no ductility.
5. 301 stainless steel
The water content of chromium is lower than 304, and its corrosion resistance is weak. However, after cold drawing, it can obtain very good tensile resistance and strength in the processing of stamping parts, and its ductility is good. It is mainly used for spring flakes to snap and prevent EMI.
