According to the size of the drawing with a shearing machine or laser cutting machine to cut aluminum plate, special shape or ventilation holes, using CNC punch or engraving machine processing.

The aluminum sheet is folded into the design shape (such as arc, right Angle, etc.) by CNC bending machine.
Arc rolling: The arc rolling machine into a cylindrical or curved shape.

Group welding: Complex structures need to be welded and spliced, and argon arc welding is used to ensure strength.
Reinforcement: Back welded reinforcement (corner code or keel) to improve deformation resistance.

Cleaning: Alkali washing to remove oil, pickling (chromified/chromium-free passivation) to enhance adhesion.
Drying: Ensure that the surface is dry and free of impurities.

Spraying: Electrostatic spraying primer → fluorocarbon top paint → varnish (strong weather resistance).
Anodizing: Electrolysis to form an oxide film to improve wear resistance.
High temperature curing: After spraying, enter the baking oven (180~250℃) to cure the coating.

Size inspection: Check whether the length, width and bending Angle conform to the drawing.
Coating test: Film thickness (≥30μm), color difference, adhesion (grid test), corrosion resistance (salt spray test).
Strength test: Check the stability of welding points and stiffeners.