关键词: 计算复杂性, 切削几何边界条件, 实体法, 铣削仿真

Abstract: Axial cutting depth and radial cutting width, namely the engagement geometric parameters, are geometric boundary conditions for the solution of milling force models. Based on the comparison of three approaches in extracting the engagement parameters, in order to promote the simulation efficiency of the direct boolean operation approach, the boolean computation to simulating the course of material removal in solid based milling simulation are described by set theory, and the efficiency influence factors of the solid modeling based milling simulation system are analyzed according to time complexity, and the improvement approaches of simulation efficiency are proposed. The feasibility analysis to reducing the Boolean operation number from 4 to 1 at the computing position during simulation are processed, the algorithm to identify and judge the corresponding cutting geometric boundary conditions are presented, the theoretic effect and the application restriction are explained, and the application example in milling force simulation are provided. By this way, the simulation efficiency can be improved and at the same time the veracity of the extracted cutting boundary parameters are ensured, so the actual application in real engineering of such physical simulation models as cutting force are promoted.

Key words: Computing complexity, Cutting geometric boundary condition, Milling simulation, Solid modeling