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Processing Method of CNC Machining Surface of Aluminum Alloy

Many people know CNC machining and understand the meaning of CNC machining. But they don't know what it means to CNC machining of aluminum alloys. In fact, CNC machining of aluminum alloys is a method of using digital information to control the movement and processing of machine tools. A machine tool that implements machining control with numerical control technology, or a machine tool equipped with a numerical control system is called a numerically controlled (NC) machine tool.

Ⅰ. CNC machining of aluminum alloy housing electroplating tin: cobalt alloy

The color tone of electroplated tin-cobalt alloy is similar to that of electroplated cobalt, but it is softer and more popular. Cobalt electroplating is not suitable for barrel plating, while electroplating tin-cobalt alloys is suitable for barrel plating of small parts. In addition, the electroplated tin-cobalt alloy has excellent throwing ability and barrel plating ability, so it can be applied to workpieces with complex shapes.

If a double layer of nickel is plated on the bottom layer, its corrosion resistance is no less than that of chrome plating. In order to prevent discoloration of the surface, it should be treated by impregnation with chromate, which can also improve its corrosion resistance.

It has a pale rose shade that makes people feel very good and has excellent corrosion resistance. If tin-nickel alloy electroplating is applied to a shiny substrate or a bright nickel electroplating layer, a good glossy surface can be obtained.

If electroplating is performed on a matte surface (pear grain), the original condition of the surface can be seen. The throwing ability of CNC precision machining electroplating layer is very good and there is almost no leveling effect, so it is suitable for electroplating of extremely thin lines and rotating processed products.

Ⅱ. Aluminum alloy CNC machining electroplating copper: tin alloy

The color of the low-tin bronze coating of the aluminum alloy shell is pink or golden, and the crystal is fine. It has high anti-corrosion ability and good polishing and rotation performance. It is often used as a protective-decorative nickel base layer and is used in light industry, handicraft industry, mechanical instrument industry and other industries.

The medium tin bronze coating is golden in color and has good corrosion resistance. It is mainly used as the bottom layer of decorative chrome plating. The hardness and stability in air of hardware aluminum alloy processing are higher than that of low tin bronze coating.

However, due to the high tin content of the coating, the bottom layer of the protective decorative coating is prone to bloom after the chrome coating, which is the weakness of the medium-tin bronze coating. The high tin bronze coating has a beautiful silver-white luster and good polishing performance, and has high hardness and wear resistance. It is used in industrial design to replace silver or chrome as a protective-decorative surface coating for reflective instruments, instruments, daily commodities, etc.

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