1.The main processes of sheet metal processing
Sheet metal processing is a combination of a series of processes, and the typical processing flow includes: cutting → punching → bending → welding → surface treatment. Understanding the characteristics and limitations of each process is a prerequisite for making excellent sheet metal designs.
| process | Equipment | Process Characteristics | Design considerations |
|---|---|---|---|
| laser cutting | Fiber laser cutting machine | High precision, small heat affected zone, capable of cutting any shape | Cut width 0.2-0.5mm, considering edge position |
| stamping forming | Punch press, hydraulic press | High efficiency, low cost, suitable for large quantities | Need to design molds and consider material elongation |
| bending forming | CNC bending machine | High angle accuracy, capable of achieving complex bending | Minimum bending radius, bending direction, bending coefficient |
| Welding assembly | Argon arc welding, laser welding, spot welding | High connection strength and sealability | Weld seam position, welding deformation, heat affected zone |
| Surface Treatment | Spraying, electroplating, anodizing | Rust proof, aesthetically pleasing, and functional | Covering area, film thickness, adhesion |
Q1: Under what circumstances should CNC machining be chosen instead of sheet metal machining?
A: It is recommended to choose CNC machining for the following situations: ① Parts with a wall thickness exceeding 5mm;
② Functional dimensions that require precise tolerances;
③ Designs with complex shapes that cannot be achieved through bending;
④ Small batch trial production (5-50 pieces);
⑤ Load bearing structural components that require processing from solid materials.
Q2: What is the approximate cost of the mold for sheet metal parts?
A: The cost of sheet metal molds varies greatly due to differences in product complexity and precision requirements. Simple stamping molds cost 10000-30000 yuan, medium complexity molds cost 50000-150000 yuan, and precision complex molds cost over 200000 yuan. It is recommended to communicate with the mold supplier during the design phase to avoid designing structures that are difficult to mold.
Q3: Which is more suitable for CNC machining between aluminum alloy 6061 and 7075?
A: 6061 has lower processing difficulty and cost, suitable for general structural components; 7075 has higher strength but greater cutting difficulty and faster tool wear, making it suitable for occasions with high strength requirements. Taking into account cost-effectiveness, 6061 is sufficient for 85% of industrial design projects.
E-mai: daisy.d@rixmanufacture.com