Design requirements for sheet metal processing technology

The materials commonly used in sheet metal processing include cold-rolled sheet (SPCC), hot-rolled sheet (SHCC), galvanized sheet (SECC, SGCC), copper (CU), brass, purple copper, beryllium copper, aluminum sheet (6061, 5052, 1010, 1060, 6063, hard aluminum, etc.), stainless steel (mirror finish, brushed finish, etc.)

1. Cold rolled SPCC sheet is mainly used for electroplating and baking paint parts, with low cost, easy molding, and material thickness ≤ 3.2mm.

2. Hot rolled plate SHCC, material T ≥ 3.0mm, also uses electroplating and baking paint parts, with low cost but difficult to form, mainly using flat parts.

3. Galvanized sheet SECC, SGCC. SECC electrolytic plates are divided into N and P materials. N material is mainly not surface treated and has a high cost, while P material is used for spraying

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4. Copper; Mainly using conductive materials, the surface treatment is nickel plating, chromium plating, or no treatment, which is costly.

5. Aluminum plate; Generally, surface chromate (J11-A) is used for oxidation (conductive oxidation, chemical oxidation), which is costly. Silver plating and nickel plating are available.

6. Aluminum profiles; Materials with complex cross-sectional structures are widely used in various plug-in boxes. Surface treatment is the same as aluminum plate.

7. Stainless steel; Mainly used without any surface treatment, high cost.

According to the different functions of the product and the selection of materials, it is generally necessary to consider the product's purpose and cost.

The common processing techniques for sheet metal parts include cutting, bending, stretching, forming, layout, minimum bending radius, burrs, rebound, dead edge, welding, etc. The main content of this article is the cutting of sheet metal parts, and the cutting methods are mainly numerical punching and laser cutting, among which numerical punching is particularly commonly used.