The part has a large length, thin walls, and dense weight-reducing holes. During the high-removal CNC machining process, it is prone to stress release and deformation, which places extremely high requirements on the fixture support method and processing sequence. At the same time, the porous structure and complex end mounting interface require strict consistency between the hole positions, hole axes, and the assembly datum plane; even a slight deviation will affect the assembly accuracy. In addition, the thin-walled areas are prone to tool deflection and chatter marks, which put forward high requirements for tool path planning, cutting parameters, and finishing stability. It is a typical high-difficulty aerospace structural part machining scenario.
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1, The benchmark system must "be determined first and then implemented",Establish datums A/B/C based on the…