Core Definitions
Sheet metal processing is a comprehensive cold-working process for metal sheets (typically ≤6mm thick). Its defining characteristic is the production of parts with uniform thickness; it is widely used in manufacturing sectors such as automotive, electronics, and hardware.
Key Processing Techniques
Blanking: Includes methods such as laser cutting, CNC punching, and shearing. Laser cutting offers precision up to ±0.1mm and is suitable for complex contours.
Bending: Uses a bending machine to shape the sheet to a specified angle; the process is efficient and simple, though trial runs are required to calibrate angles and prevent batch deviations.
Welding: Common methods include argon arc welding and laser welding. These join separate components into a complete structure, offering high joint strength and excellent sealing.
Stamping: Uses a press machine for forming; it offers high efficiency and low costs, making it ideal for the mass production of standardized parts.
Key Quality Control Standards
Dimensional Accuracy: Undimensioned tolerances follow the GB/T 1804-m standard; typical tolerances range from ±0.2mm to ±0.5mm, with high-precision capabilities reaching ±0.1mm.
Appearance Requirements: Removal of burrs and flash; free from scratches or abrasions; sharp edges must be deburred or rounded; surface treatments such as powder coating, electroplating, or wire drawing can be applied as required.
