曲线磨削无干涉的近似法向跟踪算法

Normal Tracking Algorithm for Avoiding Interference in NC Profile Grinding

针对法向跟踪曲线磨削加工中砂轮与工件的干涉问题,提出了自动避开干涉的近似法向跟踪磨削算法,并对其进行数学建模.同时,结合生产实例,在数控曲线磨床上进行了实验验证.结果表明,所提出的算法能够实现基于最佳法向跟踪角的法向跟踪曲线磨削,可以找到磨削加工中工件曲线轮廓的干涉点,并且计算出砂轮避开干涉的最佳法向跟踪角和工作台旋转角度,从而实现对任意复杂曲线轮廓的磨削加工.

An novel algorithm was presented in regard to the avoidance of interference in normal tracing grinding. The mathematic model of the algorithm was established based on the geometric characteristic and the kinematic relationship between the wheel and the workpiece. The algorithm was simulated and applied in the NC profile grinding. The simulation and experiment both show that the algorithm is effective in avoiding interference in normal tracking grinding. The interfering points on the workpiece could be exam- ined and the optimum approximated normal tracking angle could be calculated based on this algorithm.