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针对汽车覆盖件修边模具中修边镶块曲线手工难以光顺的难题,开发了基于滚圆的快速拟合曲线算法,自动完成了设计人员手工处理曲线的过程。通过提取滚圆过程中圆心的平移轨迹和旋转轨迹,定义了R曲线概念,成功将平移和旋转模拟过程的动态运动学问题转化为静态接触问题,不仅降低了算法复杂程度,也提高了曲线拟合的稳定性。与CATIA平台的光顺效果对比结果表明,该算法大大减少了处理的时间,具有较强的实用价值。
In order to solve the problem that trimming insert curve in automobile trim trimming mold is difficult to be smoothed by hand, a rapid fitting curve algorithm based on rounding is developed and the process of designer’s manual processing of curve is completed automatically. The concept of R curve is defined by extracting the translation trajectory and rotation trajectory of the circle center during the rounding process. The dynamic kinematics problem in the translation and rotation simulation process is successfully transformed into the static contact problem, which not only reduces the complexity of the algorithm but also improves the curve fitting Stability. The comparison with the smoothing effect of CATIA platform shows that this algorithm greatly reduces the processing time and has strong practical value.