What are the precautions for the design of precision automotive sheet metal parts fabrication and bending parts?
The materials commonly used in sheet metal fabrication are cold-rolled sheet (SPCC), hot-rolled sheet (SHCC), galvanized sheet (SECC, SGCC), copper (CU) brass, red copper, beryllium copper, aluminum sheet (6061, 6063, Hard aluminum, etc.), aluminum profiles, stainless steel (mirror surface, brushed surface, matte surface), according to the different functions of the product, different materials are selected, and many considerations need to be taken into account when bending sheet metal materials.
When the automobile sheet metal material is bent, the inner layer of the rounded part will be compressed, and the outer layer will be stretched accordingly; in the process of precision sheet metal fabrication, when the thickness of the sheet metal material remains unchanged, the bending The smaller the angle, the more compression and tension the material is subjected to. When its tensile force reaches its tensile limit, the sheet metal material will crack or break.
Therefore, in the design of curved parts, small bending radii should be avoided to a large extent. In general, sheet metal materials use larger bending radii. If there is no special requirement for the bending radius in actual operation, the rounded corner of the bend should be smaller than the thickness of the sheet metal material.
Cleaning operation steps:
- 1. Wash the surface of sheet metal parts with water to clean the dirt on the surface. The cleaning method generally chooses ultrasonic cleaning: using the cavitation, acceleration, and direct flow of ultrasonic waves in the liquid to directly and indirectly affect the liquid and dirt, so that the dirt layer is dispersed, emulsified, and peeled off, so as to achieve the purpose of cleaning. , which is an essential step before precision sheet metal fabrication.
- 2. Wash the sheet metal parts by adding soap, liquid detergent or 5% ammonia solution to the water.
- 3. Open the electronic manufacturing parts, pay attention to the opening method of the manufacturing parts, put the removed screws into the small box, and do not lose them.
- 4. Use a blower and a small brush to sort out the dust. The small brush can brush the gaps of capacitors and other parts, and the blower can blow the slots of each board.
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