Aluminum Alloy CNC Processing Technology

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Since the reform and opening up, China's manufacturing industry has made tremendous progress. Over the past 40 years, it has been successful in numerical control technology, especially in the processing of aluminum alloy CNC. The success of these years relies heavily on hardworking hands and Caused by wisdom. The future competition is the real technical competition, who has the new technology, who is the king.

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In the current era of numerical control and information, CNC machine tools fundamentally need to gain competitiveness and improve product quality. The road to high-end intelligence is indispensable for aluminum alloy CNC processing. In order to achieve this goal, there must be improvement in aluminum alloy CNC processing technology, then what are the aluminum alloy CNC processing technologies? What are the improvements from those aspects? As a professional CNC Precision Machining Parts Manufacturer, we would like to share with you.

Time elimination method：

1. The aging elimination method is a conventional method for reducing the residual stress of quenching. Since the aluminum alloy material, especially the aluminum alloy material for aviation, is very sensitive to temperature and the aging temperature is increased, the strength index is inevitably lowered, and the strengthening phase such as MgZn2 is excessively precipitated, resulting in an overaging phenomenon. Therefore, the aging treatment after quenching is usually carried out at a lower temperature, thus affecting the stress relieving effect (only 10-35%)

2. Mechanical Stretching Method The principle of mechanical stress relieving stress is to apply a certain amount of permanent tensile plastic deformation along the rolling direction after quenching the aluminum alloy sheet, so that the tensile stress and the original quenching residual stress are superimposed. Plastic deformation, which allows the residual stress to be relieved and released. The results of the study show that the mechanical stretching method can eliminate residual stress by more than 90%. However, this method is only suitable for parts with simple shapes, and has high requirements for the uniformity of the structure of the aluminum alloy sheet before stretching, and is mostly used in an aluminum processing factory.

3. Die cold pressing method

The mold cold pressing method eliminates the residual stress in the complex shape aluminum alloy die forgings by a strictly controlled limited cold shaping in a special finishing mold. In fact, the term "molding" is not precise enough because its main mechanism of action is to "stretch" or "compress" the local material of the aluminum alloy die forging. When the finishing mold is pressed, the finishing punch is embedded in the draft angle of the end face and the edge of the aluminum alloy die forging, which actually causes the "stretching" effect of the web portion of the die forging. Therefore, this method adjusts rather than eliminates the overall stress level of the part, which causes the residual stress of some parts of the aluminum alloy die forging to be released, and may increase the residual stress of other parts.

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