Aluminum alloy parts CNC machining process can be rough CNC machining and precision CNC machining, rough CNC machining is completed, then heat-treated the parts. The parts of the cutting stress and residual stress fully released finally, and then finishing, parts processing quality will be a large extent Improve, the implementation of rough, fine finishing separately has the following advantages:

• can reduce the impact of residual stress on the deformation. After the roughing is completed, it is recommended to use heat treatment to remove the stress caused by the rough CNC machining of the parts, so as to reduce the influence of stress on the finishing quality.
• Improve the CNC machining accuracy and surface quality. Coarse, finishing after the separation, the finishing is only processing a smaller margin, resulting in less processing stress and deformation, to a greater degree to improve the quality of parts.
• Increase productivity. Since roughing only removes excess material, leaving enough margin for finish CNC machining, it does not take into account the size and tolerance, effectively giving play to the performance of different types of machine tools and improving the cutting efficiency.