Aluminum alloy is an important industrial raw material. Due to its low hardness and large thermal expansion coefficient, it is easy to deform when processing thin-walled and thin-plate parts. In addition to improving tool performance and pre-aging treatment to eliminate the internal stress of the material, from the perspective of aluminum alloy processing technology, some measures can be taken to minimize the processing deformation of the material.

For aluminum alloy parts with large aluminum alloy machining allowance, in order to create better heat dissipation conditions and reduce thermal deformation, excessive heat concentration should be avoided as much as possible. A method that can be used is symmetry processing. For example, there is a pieceThe 90mm thick aluminum alloy plate needs to be milled to a thickness of 60mm. If it is turned over immediately during milling, because each surface is processed to the specified size at one time, the continuous machining allowance is large, which will cause the problem of heat concentration and make the flatness of the milled aluminum alloy worse. If the symmetrical processing method with repeated feed on both sides is adopted, each surface is processed at least twice until the size is reached, which is conducive to heat dissipation, and the flatness can be controlled at 0.3mm. Let's take a look at the method of aluminum alloy processing to prevent deformation.

1. Multi-layer processing mode

When the aluminum alloy plate has multiple cavities that need to be processed by aluminum alloy, if one cavity and one cavity are processed in sequence, it is easy to cause the cavity wall to be deformed due to uneven stress. The solution is to adopt the method of multi-layer processing, that is, all cavities are processed at the same time, but not at one time, but divided into several layers and processed to the required size layer. In this way, the force of the parts will be more uniform, and the probability of deformation during aluminum alloy processing will be smaller.

2. Correct selection of cutting amount

Choosing the appropriate cutting amount can effectively reduce the cutting force and cutting heat in the process of aluminum alloy processing and cutting. In the processing process, the amount of cutting is too large, resulting in a cutting force is too large, easy to cause parts deformation, affecting the rigidity and service life of the machine tool spindle.

Among the various elements of the cutting amount, the after-cutting amount has a large influence on the cutting force. It is said that reducing the amount of recapturing helps to ensure that the parts are not deformed, but it also reduces processing efficiency. High-speed milling of aluminum alloy processing can solve this problem. Only by increasing the feed rate, increasing the speed of the machine tool and reducing the amount of cutting, can the cutting force be reduced and the processing efficiency be guaranteed.