How are the common aluminum alloy surfaces processed?

Aluminium alloy this one material already exists in the life, but in last few years the application that passes high-tech product played its a pattern, become tall rich handsome delegate. In particular, apple, Samsung, Meizu, Xiaomi, Huawei and so on have made great efforts in the use of materials and processing technology in the competition of mobile phone design in recent years. Today we introduce the various processing methods of this material!

Aluminum because of its easy processing, good visual effect, the surface treatment method is rich, the first adopted by each manufacturer, aluminum surface treatment is mainly divided into: sandblasting (form the pearl matte silver surface), polishing formation (mirror), drawing (form like satin effect), electroplating a layer of other metal (cover), spray other non-metallic coating (cover).

1. Sandblast

Sandblasting is powered by compressed air to form a high-speed jet beam to spray materials (copper ore, quartz sand, emery, iron sand, sea sand) at high speed to the surface of the workpiece to be processed, so that the appearance or shape of the workpiece surface changes.

Sandblasting has a strong application in engineering and surface technology, such as: improve the viscosity of adhesive parts, decontamination, optimization of machined surface burr, surface matte treatment.

The sandblasting process is more uniform and efficient than hand grinding, and the stainless steel treatment of this method creates a low-key, durable character.

2. The polishing

Polishing process is mainly divided into: mechanical polishing, chemical polishing, electrolytic polishing.

Aluminum parts using mechanical polishing + electrolytic polishing can be close to stainless steel mirror effect, give a person with high-grade simple, fashionable future feeling

3. The drawing

Metal wire drawing is a manufacturing process in which aluminum sheets are repeatedly sanded out of the wire. Drawing can be divided into straight line drawing, random drawing, spiral drawing, thread drawing.

Metal wire drawing process, can clearly show each fine silk mark, so that the metal matte out of the fine hair luster, the product has fashion and sense of science and technology.

4. High light cutting

The diamond cutter is reinforced by the fine carving machine in the high speed rotation (general speed of 20000 RPM) on the spindle of the fine carving machine to cut parts, resulting in a local highlighting area on the surface of the product. The brightness of the cutting highlights is affected by the speed of the milling bit. The higher the speed of the bit, the brighter the highlights will be, and the darker and more likely to produce the cutter grain.

High light high light cutting in the use of mobile phones, such as iphone5, in recent years, some high-end TV metal frame using high light milling process, coupled with anodic oxidation and wire drawing process makes the whole TV is full of fashion sense and sharp sense of science and technology.

5. Anodic oxidation

Anodic oxidation refers to the electrochemical oxidation of metal or alloy, aluminum and its alloy in the corresponding electrolyte and specific process conditions, due to the action of the impressed current, aluminum products (anode) on the formation of a layer of oxide film process.

Anodic oxidation can not only solve the defects of aluminum surface hardness, wear resistance and other aspects, but also prolong the service life of aluminum and enhance the aesthetic degree, has become an indispensable part of aluminum surface treatment, is currently the most widely used and very successful process.

6. Dual color anodic oxidation

Two-color anodizing refers to anodizing a product and giving specific areas different colors.

Double-color anodic oxidation has high cost because of its complex process. But through the contrast between the two colors, more can reflect the high-end, unique appearance of the product.