Surface treatment of CNC machined parts

In the rapid prototyping manufacturing industry, various surface treatments are used. Surface treatment refers to the formation of a surface layer with one or more special properties on the surface of a material by physical or chemical methods. The appearance, wear resistance, corrosion resistance, hardness, strength and other characteristics of the product can be improved through surface treatment. 1. Machined surface Machined surface is a common surface treatment. The surface of the part formed after CNC machining will have clear processing lines, and the surface roughness value is Ra0.2-Ra3.2. There are usually surface treatments such as deburring and sharp edge removal. This surface is suitable for all materials. 2. Polishing Polishing refers to the use of mechanical, chemical or electrochemical effects to reduce the surface roughness of the workpiece to obtain a bright and smooth surface. 3. Sand blasting Sand blasting is a surface treatment method that uses the impact of high-speed sand flow to clean and roughen the surface of the workpiece to obtain a certain degree of cleanliness and roughness on the surface of the workpiece. 4. Anodizing Anodizing is a surface treatment method that uses electrochemical oxidation of metals or alloys to form an oxide film on the surface of parts, which can prevent wear and oxidation of parts and increase the aesthetic effect. Different colors can be realized on the part surface. This type of surface treatment is only suitable for metal parts. 5. Electroplating Galvanizing is a surface treatment method in which a thin layer of zinc is plated on the metal surface, which can prevent metal oxidation, improve wear resistance, corrosion resistance and enhance aesthetics. The surface of the parts can also be copper-plated, nickel-plated, silver-plated, gold-plated. This type of surface treatment is only suitable for metal parts. 6. Painting Painting is the surface treatment method of spraying a layer of paint on the surface of parts. The color can be adjusted according to the needs of customers, and the surface can achieve matte, bright, metallic luster. 7. Brushed surface Brushed surface treatment is a surface treatment method that forms a linear surface texture on the surface of the workpiece by grinding the product to achieve a decorative effect.