The processes and technologies involved in a set of precision automotive sheet metal prototype stamping parts are mainly reflected in the following aspects:
1. Drawing design and unfolding: This is the starting point of sheet metal processing. Engineering personnel will accurately measure, design, and unfold based on the drawings or samples provided by the customer, forming detailed processing and assembly diagrams to provide clear guidance for subsequent production.
2. Laser processing and CNC stamping: Laser cutting machines can efficiently and accurately cut materials such as carbon steel and stainless steel, especially suitable for workpieces with curvature. CNC punching machines are more suitable for processing workpieces with thinner thickness and more holes, and have a higher cost advantage.
3. Board cutting and punching: The shearing machine cuts the board into specific sizes through the relative movement of the upper and lower blades. Punching is the precise cutting of materials into specific shapes using punching machines and molds, suitable for large-scale production with high processing accuracy.
4. Bending process: After the workpiece is cut, it is quickly and accurately bent into shape using a computerized bending machine.
5. Stretching or deep draw stamping process: Stretching or deep draw stamping is a manufacturing process that forcibly shapes a metal plate in a mold, usually using high hardness steel molds to stretch the material into the final design shape. For prototype or small batch prototype deep drawing parts, prototype factories usually develop fast soft molds for deep drawing forming. The selection of mold materials is usually determined by the material, thickness, and processing quantity of the parts that need to be formed, ranging from ordinary resins to various metal materials such as ABS, phenolic resin, aluminum alloy, carbon steel, and so on.
6. Welding Forming: Assemble according to the requirements by selecting non-welding processes such as screws and rivets, or welding methods such as argon arc welding and butt welding.
7. Surface treatment: For carbon steel workpieces, electrostatic powder coating is a commonly used surface treatment method, which involves multiple steps such as oil and rust removal, surface cleaning, phosphating treatment, and then electrostatic powder coating and high-temperature baking to present a beautiful and durable effect on the surface of the workpiece. For large workpieces or situations where they cannot be transported, liquid painting technology is also a practical choice.
8. Grinding and Polishing: Polish the workpiece to ensure its aesthetic appearance.
9. Inspection and packaging: Conduct a 100% inspection and provide detailed inspection data before shipment. The shipping method and requirements will be confirmed with the customer to ensure the perfect delivery of the product.
