Sheet metal, a processing technology, can be defined as: Sheet metal is a comprehensive cold processing technology for metal sheets (usually less than 6mm), including shearing, punching/cutting/compositing, folding, riveting, splicing, forming (such as automobile body) etc. Its remarkable feature is that the thickness of the same part is consistent.
Sheet metal has the characteristics of light weight, high strength, conductivity (can be used for electromagnetic shielding), low cost, and good mass production performance. It has been widely used in electronic appliances, communications, automotive industry, medical equipment and other fields, such as in Sheet metal is an essential component in computer cases, mobile phones, and MP3 players. As the application of sheet metal becomes more and more widespread, the design of sheet metal parts has become a very important part of the product development process. Mechanical engineers must master the design skills of sheet metal parts so that the designed sheet metal meets the requirements of the product. Requirements such as function and appearance can make the manufacturing of stamping molds simple and low-cost.
Main uses:
There are many sheet metal materials suitable for stamping processing. Sheet metal materials widely used in the electronic and electrical industry：
1. Ordinary cold-rolled plate SPCC SPCC refers to steel ingots that are continuously rolled by a cold rolling mill into steel plate coils or sheets of required thickness. There is no protection on the surface of SPCC, and it is easily oxidized when exposed to the air. Especially in humid environments, the oxidation rate accelerates and dark red rust appears. The surface must be painted, electroplated or otherwise protected during use.
2. Galvanized steel sheet SECC: The base material of SECC is general cold-rolled steel coils. After degreasing, pickling, electroplating and various post-processing processes in the continuous electro-galvanizing production line, it becomes an electro-galvanized product. SECC not only has the mechanical properties and similar processability of general cold-rolled steel sheets, but also has superior corrosion resistance and decorative appearance. It is highly competitive and substitutable in the markets of electronic products, home appliances and furniture. For example, SECC is commonly used in computer cases.
3. Hot-dip galvanized steel sheet SGCC Hot-dip galvanized steel coil refers to a semi-finished product that is hot-rolled, pickled or cold-rolled. After cleaning, annealing, and immersing in a molten zinc bath with a temperature of about 460°C, the steel sheet is plated. The zinc layer is then tempered, leveled and chemically treated. SGCC material is harder than SECC material, has poorer ductility (avoid deep drawing design), thicker zinc layer, and poorer weldability.
4. Stainless steel SUS301 has a lower Cr (chromium) content than SUS304 and has poorer corrosion resistance. However, it can obtain good tensile strength and hardness after cold processing and has good elasticity. It is mostly used for springs and EMI prevention.
5. Stainless steel SUS304 is one of the most widely used stainless steels. Because it contains Ni (nickel), it has better corrosion resistance and heat resistance than steel containing Cr (chromium). It has very good mechanical properties, no heat treatment hardening phenomenon, and no elasticity. .
