中文摘要：

针对复杂通道类零件的五轴数控加工,提出一种控制刀轴稳定变化的刀轴规划方法。首先,通过对刀轴可行空间的均匀离散,建立一种高效求解刀轴可行空间精细边界的方法;然后,依据刀轴矢量规划准则,求解满足机床角加速度约束的可行刀轴序列集合,并提出一种切削行内旋转坐标线性变化的刀轴矢量规划方法;最后,通过建立刀轴变化和残留高度综合评价指标,得到优化的刀轴矢量,并与典型的商用软件进行了实验对比验证。结果表明,使用本文提出的刀轴规划方法得到的切削行刀位轨迹旋转坐标变化均匀,旋转轴角加速度最大值降低到商用软件的10%以下,残留高度平均值降低了22%,改善了切削过程的稳定性,提高了加工表面质量。

英文摘要：

A new method of planning is proposed to obtain a stably changing tool axis in five-axis machining of complex channel parts.First,an efficient approach to obtain the accurate boundary of the feasible space of tool axis is established by dispersing the feasible space uniformly.Secondly,according to the proposed planning criteria,the feasible spaces of a tool axis are calculated which satisfy the constraints of the angular acceleration of the machine tool along a tool path,and a method is proposed to make the rotational coordinates change linearly.Finally,considering both the proposed tool axis planning method and the desired scallop height,tool axis vectors are determined and then compared with the results of a commercial software,which shows that the proposed method obtains linearly changing rotational coordinates along a tool path.The maximum angular acceleration of the rotational axis and the average of the scallop height of machined surfaces are reduced respectively to lower than 10%and by 22%of the commercial software.The machining stability and machined surface quality are also obviously improved.