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Sheet metal parts are characterized by their light weight, high strength, electrical conductivity (making them suitable for electromagnetic shielding), low cost, and excellent performance in large-scale mass production. As a result, they are widely used in fields such as electronics and appliances, telecommunications, the automotive industry, and medical devices. For example, in computer cases, mobile phones, and MP3 players, sheet metal components are indispensable structural elements.
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Sheet metal parts are characterized by their light weight, high strength, electrical conductivity (making them suitable for electromagnetic shielding), low cost, and excellent performance in large-scale mass production. As a result, they are widely used in fields such as electronics and appliances, telecommunications, the automotive industry, and medical devices. For example, in computer cases, mobile phones, and MP3 players, sheet metal components are indispensable structural elements.
As the application of sheet metal continues to expand, the design of sheet-metal components has become a critical component of the product-development process. Mechanical engineers must master the techniques for designing such components to ensure that the resulting parts not only meet functional and aesthetic requirements but also lend themselves to simple, cost-effective stamping-tool manufacturing.
A wide variety of sheet-metal materials are suitable for stamping, and those commonly used in the electronics and electrical industries include:
1. Common Cold-Rolled Sheet SPCC
SPCC refers to steel ingots that are continuously cold-rolled on a rolling mill to produce steel sheet coils or sheets of the required thickness. The surface of SPCC is completely unprotected and readily oxidizes when exposed to air; this oxidation accelerates in humid environments, leading to the formation of dark reddish-brown rust. Therefore, prior to use, the surface must be coated with paint, electroplated, or otherwise protected.
2. SECC Galvanized Steel Sheet
SECC is manufactured from standard cold-rolled steel coil, which, after undergoing degreasing, pickling, electro-galvanizing, and a series of post-treatment processes on a continuous electro-galvanizing line, becomes an electro-galvanized product. SECC not only exhibits the mechanical properties and comparable formability of conventional cold-rolled steel sheet but also boasts superior corrosion resistance and an aesthetically pleasing finish. As a result, it is highly competitive and often used as a substitute in the electronics, home appliance, and furniture markets. For instance, SECC is widely employed in computer cases.
3. Hot-Dip Galvanized Steel Sheet SGCC
Hot-dip galvanized steel coil is produced by first cleaning and annealing hot-rolled, pickled, or cold-rolled semi-finished steel strips, then immersing them in a molten zinc bath at approximately 460°C to deposit a zinc coating. The coated strip is subsequently stress-relieved, leveled, and subjected to chemical treatment. Compared with SECC, SGCC material is harder and exhibits poorer ductility (thus discouraging deep-drawing designs), has a thicker zinc coating, and demonstrates inferior weldability.
4. Stainless Steel SUS301
Cr (chromium) content is lower than that of SUS304, resulting in poorer corrosion resistance; however, cold working can impart excellent tensile strength and hardness, along with good elasticity, making it suitable for applications such as spring clips and EMI shielding.
5. Stainless Steel SUS304
One of the most widely used stainless steels, it exhibits superior corrosion and heat resistance compared with chromium-containing steels due to its nickel content, while also boasting excellent mechanical properties. It does not harden through heat treatment and lacks elasticity.
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Address: No. 160, Aige Hao Road, Weitang Town, Xiangcheng District, Suzhou City
Company website:www.zxgzx.com.cn
Phone:0512-67222911
Mobile phone:13812672860
E-mail:zgy@zxgzx.com.cn
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