Simple Guide to Surface Finish after CNC Milling Metal Stamping

1. PVD vacuum plating, physical vapor deposition (PVD): nIt is an industrial manufacturing process, which is a technology that mainly uses physical processes to deposit thin films. Process: pre-PVD cleaning→intake vacuuming→washing target and ion cleaning→coating→coating end, cooling out→posting (polishing, AFP) Technical features: PVD (Physical Vapor Deposition) can be on metal surface Plated high hard plating, high wear resistance cermet decorative plating 2. Electroplating: nIt is a technique that uses electrolysis to adhere a metal film to the surface of a metal to prevent corrosion, improve wear resistance, electrical conductivity, light reflectivity, and enhance aesthetics. Process: pre-treatment→Cyanide-free copper→Cyanide-free white copper-tin-plated→Chromium-plated, advantages 1. High gloss of coating, high-quality metal appearance; 2. Substrate is SUS, Al, Zn, Mg, etc.; cost is lower than PVD. Disadvantages: poor environmental protection and high risk of environmental pollution. 3. Powder coating: nPowder coating is sprayed onto the surface of the workpiece by a powder spraying device (electrostatic spray machine). Under the action of static electricity, the powder will be uniformly adsorbed on the surface of the workpiece to form a powder coating. Layer; the powder coating is cured by high-temperature baking and flattening, and becomes the final coating with different effects (different kinds of effects of powder coating). Upper part → electrostatic dust removal → spraying → low temperature leveling → baking. Advantages: 1. Rich color, high gloss and matt optional; 2. Low cost, suitable for building, furniture products and heat sink shell; 3, high utilization rate, 100{ef5518e4f4df6ec43b9eae0baf527022700eb288ef6c79462f964eb9d4a49a6f} utilization, environmental protection; 4. Shading defect ability Strong; 5, can imitate the effect of wood grain. 4. Brushing: It is a kind of surface treatment method that forms lines on the surface of the workpiece by grinding the product and plays a decorative effect. According to the difference of the texture after drawing, it can be divided into: straight line drawing, chaotic drawing, ripple, and swirling. The wire drawing process can obtain a non-mirror-like metallic luster on the metal surface, and the wire drawing treatment can also eliminate the fine flaws on the metal surface.