Aluminum alloy is an important industrial raw material. Due to its relatively small 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 employed is a symmetric process. For example, there is a pieceThe 90mm thick aluminum alloy plate needs to be milled to a thickness of 60mm. If you turn over the surface immediately while milling, because each side 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 learn about the method of aluminum alloy processing without deformation.

1. Multi-layer processing mode

When the aluminum alloy plate part 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 distortion and deformation of the cavity wall due to uneven stress. The solution is to use the method of multi-layer processing, that is, all the cavities are processed at the same time, but not at one time, but it is divided into several layers and processed to the required size layer. In this way, the force of the part will be more uniform and the probability of deformation will be smaller.

2. Correct selection of cutting amount

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

Among the various elements of the cutting amount, the back cutting amount is the one that has a greater impact on the cutting force. It is said that reducing the amount of recoil is conducive to ensuring that the parts are not deformed, but it will also reduce the processing efficiency. High-speed milling of aluminum alloy processing can solve this problem. Just increase the feed, improve the machine speed, while reducing the amount of back, you can reduce the cutting force, to ensure processing efficiency.