Machined surface treatment process can be divided into metal surface treatment and non-metal surface treatment. Non-metallic surface treatment process can be used to remove surface oil stains, plasticizers, release agents and other mechanical treatment; Remove surface stickies by electric field, flame and other physical methods; There are also flame treatment, discharge treatment and plasma discharge treatment.

The metal surface treatment process is as follows: ① Anodic oxidation: through the electrochemical principle, the aluminum oxide film is formed on the surface of aluminum and aluminum alloy, which is suitable for the surface treatment of aluminum and aluminum alloy; ② Electrophoresis: simple treatment, pretreatment - electrophoresis - drying, suitable for stainless steel and aluminum alloy materials; ③ PVD vacuum plating: using the technology of depositing thin film in the logistics process, it is suitable for metal ceramic coating; ④ Spraying powder: powder coating is applied to the surface of the workpiece through powder spraying equipment, which is often used for building furniture products and heat sinks; ⑤ Electroplating: improve the wear resistance and beauty of the workpiece by attaching a metal film to the metal surface; ⑥ Polishing: mechanical polishing, chemical polishing, electrolytic polishing, ultrasonic polishing, fluid polishing and magnetic abrasive polishing, which can reduce the surface roughness of the workpiece by mechanical, chemical or electrochemical effects.