Metal materials are used more and more in various existing products, because metal materials can better reflect product quality and highlight brand value. Among many metal materials, aluminum is easy to manufacture into CNC machining parts, It has good visual effect and rich surface treatment methods. It is the first to be adopted by various machining manufacturers. The surface treatment of aluminum profiles is mainly divided into: sandblasting (to form a matte pearl silver surface), polishing (to form a mirror surface), and wire drawing (to form a similar satin effect). ), electroplating (covering a layer of other metals), spraying (covering other non-metallic coatings)
The first is sandblasting (shot peening), the process of cleaning and roughening metal surfaces using the impact of a high-speed sand stream. The surface treatment of aluminum parts in this method can make the surface of the workpiece obtain a certain degree of cleanliness and different roughness, so that the mechanical properties of the aluminum alloy surface of CNC machining parts can be improved, thus improving the fatigue resistance of the workpiece, increasing its and The adhesion between the coatings prolongs the durability of the coating film and is also conducive to the leveling and decoration of the coating. This process is often seen in Apple's various products, and is increasingly used in existing TV covers or mid-frames.
The second is the polishing process, which uses mechanical, chemical or electrochemical methods to reduce the surface roughness of aluminum alloy CNC machining parts to obtain a bright and flat surface. The polishing process is mainly divided into: mechanical polishing, chemical polishing, electrolytic polishing. The machined aluminum parts are polished + electropolished, which can be close to the mirror effect of stainless steel, giving people a sense of high-end simplicity and fashionable future (of course, it is easy to leave fingerprints and needs to be taken care of).
The third type, metal wire drawing, is a manufacturing process in which the aluminum plate is repeatedly scraped out of the line with sandpaper. Drawing can be divided into straight drawing, random drawing, spiral drawing, thread drawing. The metal wire drawing process can clearly show every tiny silk mark, so that the fine hair luster appears in the metal matte, and the product has a sense of fashion and technology.
Fourth, highlight cutting. Using the engraving machine, the diamond knife is reinforced on the main shaft of the engraving machine rotating at a high speed (generally 20,000 rpm) to cut the parts, and a local highlight area is generated on the surface of the product. The brightness of the cutting highlights is affected by the speed of the milling drill. The faster the drill speed, the brighter the cutting highlights, and vice versa, the darker and easier to produce cutting lines. High-gloss and high-gloss cutting is particularly used in mobile phones, such as iphone5. In recent years, some high-end TV metal frames have adopted high-gloss milling process. In addition, anodizing and wire drawing processes make the TV set full of fashion and technology.
The fifth anodic oxidation refers to the electrochemical oxidation of metals or alloys. Under the corresponding electrolyte and specific process conditions, aluminum and its alloys form an oxide film on the aluminum product (anode) due to the action of the applied current. the process of. Anodizing of aluminum alloy CNC machining parts can not only solve the defects of aluminum surface hardness and wear resistance, but also prolong the service life of aluminum and enhance the aesthetics. A broad and very successful process.
Finally, two-color anodizing refers to anodizing on one product and imparting different colors to specific areas. Two-color anodizing is expensive because of the complicated process; however, the contrast between the two colors can better reflect the high-end and unique appearance of CNC machining parts.