How does CNC parts processing improve part performance through post-processing?
Publish Time: 2025-03-03
CNC (numerical control) processing technology occupies an important position in modern manufacturing. It can achieve high-precision and high-efficiency part processing. However, relying solely on CNC processing is not enough to guarantee the final performance of parts. Post-processing steps, especially surface treatment technology, are crucial to improving the performance of parts. This
After CNC processing, milling marks, burrs and other defects may be left on the surface of the parts. These defects not only affect the appearance quality of the parts, but may also cause wear, scratches and even safety hazards during use. In addition, different application scenarios have different performance requirements for parts, such as corrosion resistance, wear resistance, conductivity, etc. Therefore, the post-processing step has become a key link to improve part performance and meet specific application requirements.
2. Common methods of post-processing of CNC parts processing
There are many methods for post-processing of CNC parts processing. Different post-processing methods can be selected according to different part materials, performance requirements and application scenarios. Here are some common post-processing methods:
Tumbling: Remove burrs and flaws on the surface of parts and improve surface finish through friction between the abrasive in the drum and the parts.
Brushing: Use a metal brush or abrasive belt to perform unidirectional or cross-brush treatment on the surface of parts to form a specific texture and gloss.
Bead Blasting: Use high-pressure air to spray abrasive particles onto the surface of parts to remove surface flaws and produce a uniform matte effect.
Anodizing: Especially suitable for aluminum and titanium alloys, it forms a dense, electrically insulating and durable oxide layer through electrochemical treatment in an electrolyte.
Transparent anodizing: Generates a transparent and dense oxide film on the surface of metals such as aluminum profiles to improve the corrosion resistance and aesthetics of the metal.
Black oxidation: Forms a black iron oxide layer on the surface of ferrous metals to improve the dimensional stability and visual effect of parts and reduce reflectivity.
Powder coating: Similar to painting, but using an electrostatic spray gun to spray dry powder on parts, which then solidifies to form a hard, durable protective layer.
Chemical film treatment: A thin and dense protective film is formed on the metal surface through chemical reaction, which improves the corrosion resistance of the parts and maintains excellent conductivity.
3. Improve part performance through post-treatment
Improve surface finish: Mechanical treatment methods such as rolling, brushing and sandblasting can effectively remove defects and burrs on the surface of parts and improve surface finish. This not only improves the appearance quality of the parts, but also reduces the wear and scratches caused by surface defects during use.
Enhance corrosion resistance: Methods such as anodizing, transparent anodizing and chemical film treatment can form a protective film on the surface of parts, effectively blocking the erosion of external corrosive media. This is particularly important for parts used in harsh environments and can significantly extend their service life.
Improve wear resistance: Through methods such as anodizing, hard anodizing and powder coating, the hardness of the surface of the parts can be increased, thereby improving their wear resistance. This is crucial for parts that need to withstand friction and wear.
Adjust conductivity: Anodizing forms an electrical insulation layer, while chemical film treatment maintains excellent conductivity. Depending on the application requirements of the part, the appropriate post-processing method can be selected to adjust its conductivity.
Improve visual effects: Methods such as brushing, sandblasting, and powder coating can give parts a specific texture, gloss, and color, thereby enhancing their visual effects and texture. This is especially important for consumer products, which can enhance the product's appeal and market competitiveness.
Post-processing of CNC parts processing is a key step in improving part performance. By selecting the appropriate post-processing method, you can effectively remove surface defects and burrs on parts, enhance corrosion resistance, improve wear resistance, adjust conductivity, and improve visual effects. These post-processing steps not only improve the performance and quality of parts, but also meet the specific requirements of part performance in different application scenarios.
