关键词: 仿真平台, 装夹优化, 变形预测, 切削参数, 有限元 , 薄壁件

Abstract: In order to control machining deflection force-induced of thin-walled workpiece, a fast simulation platform was introduced which integrated fixture optimization, deflection prediction, cutting parameters optimization and error compensation. In its implementation, various clamping schemes were compared based on error control and the optimal scheme was determined. The influence of machining deformation of the previous layer on nominal cutting depth of current layer was considered to achieve a dynamic equilibrium between the cutting force and deflection. To obtain optimal cutting parameters, an optimization model was proposed to reduce the degree of deformation. The finite element method was used to analyze the deformation and a genetic algorithm was developed to solve the optimization model. Compensation optimization by taking the coupling of deflection and machining force into account was realized to obtain the compensation values. The fast simulation platform based on ABAQUS was implemented and a specular seat was simulated. The simulation results showed that the platform was feasible to obtain optimal schemes or parameters.

Key words: simulation platform, fixturing optimization, deflection prediction, cutting parameters, finite element, thin-walled workpiece