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针对目前利用包含环面刀具等多种刀具加工复杂曲面时普遍存在的不能实现一阶连续问题,本文提出了一种复杂曲面五坐标加工中双线驱动刀轨规划算法。该方法首先利用多点法来优化每一个刀位,从而获得整行刀轨的最大加工带宽,于是可以在工件曲面上确定两条驱动线。然后,在保证刀轨光顺的前提下,使刀具沿着两条驱动线滑动,且在每个刀触点处都重新定位刀具。最后,通过仿真和加工试验来验证该方法的有效性,并利用三坐标测量机对加工型面进行了测量,结果表明该方法能有效地消除相邻刀轨衔接处的尖锐残高、保证刀轨的光顺性和提高曲面的加工质量。
Aiming at the problem that first-order continuous problems can not be realized when machining complex curved surfaces including toroidal tools, the double-track driven tool path planning algorithm in complex five-coordinate machining is proposed in this paper. In this method, the multi-point method is used to optimize each tool position to obtain the maximum machining bandwidth of the entire tool path. Therefore, two driving lines can be determined on the workpiece surface. Then, with the toolpath smooth, slide the tool along the two drive lines and reposition the tool at each knife contact. Finally, the effectiveness of the method is verified by simulation and machining tests. The machining profile is measured by CMM. The results show that the method can effectively eliminate the sharp residual height of the adjacent tool path and ensure the tool path The smoothness and improve the processing quality of the surface.