基于曲面分区的多道次数控渐进成形轨迹生成

Multi-stage CNC Incremental Forming Path Generation Based on Surface Zoning

为实现含有直壁等难成形曲面的高效成形,以三角网格模型为研究对象,提出基于曲面分区的个性化多道次数控渐进成形方式和在各曲面分区内进行各道次成形加工所需轨迹生成方法。给出了基于可成形性的三角网格曲面分区算法和通过偏置来生成各曲面分区多道次螺旋线成形轨迹的方法。算法应用实例表明,该方法能够对曲面进行分区,并为相关曲面分区生成光滑连续的多道次螺旋线成形轨迹。

In order to realize the efficient forming of difficulty forming surfaces such as vertical wall, the method of multi-stages CNC incremental forming with individuation was proposed based on the surface zoning for the triangular mesh model, and the generation method of the path which needed by each stage forming in the surface zone was studied. A triangular mesh surface zoning approach based on formability was given. Moreover a strategy to generate multi-stage spiral forming tool path for each surface area by offset was presented. The case studies indicated that the proposed method could realize surface zoning and generate smooth and successive multi-stage spiral forming path for the corresponding surface zones.