对于非凸区域加工范围的口腔修复体的行切走刀方式，针对跳刀频繁问题，提出了基于二维平面规划的导动曲线生成算法。该方法首先利用平行线段与加工区域求交得到交点，建立交点与加工区域边界的拓扑连接关系，根据对应关系按照一定的原则连接交点以及区域的边界点从而构建出连续的较少跳刀的导动曲线。最终生成刀具轨迹的跳刀次数与导动曲线的跳刀次数一致。实例表明该算法稳定快速且可靠，能显著减少跳刀次数，提高口腔修复体的加工效率。%In order to solve the problem of frequent retraction of direction parallel tool pam m me non-convex machining of dental restoration, the generation algorithm of guide lines planning on two-dimension plane is proposed. First of all, the topology relationship between the boundary of machining region and intersections obtained from the parallel line intersected with the machining region should be established, and then the intersections and points in the boundary to form continuous guide lines with less retraction should be linked, according to the corresponding re- lationship. The tool retraction of the resulting tool path generated by the present algorithm is equal to the number of guide lines. The testing results show that the algorithm is stable, fast and reliable, and it can significantly reduce the frequency of tool retraction and improve the processing efficiency of dental restoration.
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