关键词: 加工, 变形, 迭代算法, 薄壁件, 优化, 主动补偿

Abstract: In order to control the machining error caused by cutting deformation of thinwalled parts, two approaches of machining path compensation are proposed, i.e., multilayer full compensation and optimization compensation. A mathematical model is established for the optimization compensation by considering the coupling effect between the machining deformation and the cutting force. The model is solved with an iterative algorithm. The case of the end milling for a thinwalled aircraft part is taken as an example to study the three compensation methods of full compensation at the last layer, multilayer full compensation, and optimization compensation. The simulation results of the three compensation methods are compared with those of experiments. The conclusion is that the last two compensation methods can reduce machining errors better than the first one. These two compensation methods are proved to be efficient in controlling machining deformation and reducing machining errors.

Key words: machining, deformation, iterative algorithm, thin-walled part, optimization, active compensation