关键词: 空间填充曲线, 等残留高度, 刀具轨迹, 回路, 数控系统

Abstract: A new tool path placement algorithm for five-axis machining was proposed based on the adaptive space filling curves algorithm and the constant scallop-height algorithm. The initial circuits were constructed by overlaying two constant scallop-height tool paths of u and v directions. Instead of Cartesian coordinates, parameter variable was used to compute the vertices so as to greatly improve the calculation speed. The adjacent four intersections were taken as a circuit. Merging direction of circuits were judeged by the overall conditions, which made merging process satisfy the condition of hamiltonian circuit. Then, the final Hamiltonian circuit was considered as tool path. The proposed algorithm could get the approximate shortest and continuous tool path, and it also decreased the machining time of free surface. Finally, the effectiveness of this method was verified by a case study.

Key words: space filling curve, constant scallop-height, tool path, circuits, numerical control systems