CAJ | 학술논문

为了解决复杂三角网格模型数控加工效率与精度之间的矛盾，提出包括模型分割以及子区域轨迹规划的分治加工方法。针对分治加工的需求，提出一种基于加工区域特征表述的区域生长原则，用于模型的区域生长分割；为避免在子区域中生成过多的短刀具轨迹，对分割后的子区域进行区域优化合并与边界光顺处理，子区域轨迹规划时对不同的特征子区域采用不同的刀具轨迹生成策略。在等残留高度法刀具轨迹生成中，提出初始轨迹生成方法，并改进扩展了刀具轨迹的投影偏置扩展过程，以解决边界不规则子区域的刀具轨迹生成问题。实例结果表明，基于加工区域特征表述的区域生长原则能够有效地驱动加工模型的区域生长分割，不同特征子区域以适当的刀具轨迹生成策略生成了有效的刀具轨迹。
위료해결복잡삼각망격모형수공가공효솔여정도지간적모순，제출포괄모형분할이급자구역궤적규화적분치가공방법。침대분치가공적수구，제출일충기우가공구역특정표술적구역생장원칙，용우모형적구역생장분할；위피면재자구역중생성과다적단도구궤적，대분할후적자구역진행구역우화합병여변계광순처리，자구역궤적규화시대불동적특정자구역채용불동적도구궤적생성책략。재등잔류고도법도구궤적생성중，제출초시궤적생성방법，병개진확전료도구궤적적투영편치확전과정，이해결변계불규칙자구역적도구궤적생성문제。실례결과표명，기우가공구역특정표술적구역생장원칙능구유효지구동가공모형적구역생장분할，불동특정자구역이괄당적도구궤적생성책략생성료유효적도구궤적。
To solve the contradiction between machining efficiency and accuracy in NC machining of the com-plex triangular mesh model, a method of partition machining is presented, which is composed of the segmentation of mesh model and tool path generation of sub-regions. A growing principle based on machining feature formula-tion is proposed for the region growing segmentation. To avoid unnecessary short tool-path, sub-regions are opti-mized, and their boundaries are smoothed. While planning tool path, different strategies of tool path are adopted for different feature sub-regions. To generate constant scallop-height tool path from the sub-regions with irregular boundary, a method of original tool path generation is proposed, and the process of tool path projection and offset is improved. An instance illustrates that the growing principle based on machining feature formulation can make it efficient to segment the triangular mesh model, and the effective tool paths can be generated from different fea-ture sub-regions with appropriate strategies.