数控系统小线段高速加工中的“拐点问题”

在数控系统的连续小线段高速插补中,由于线段终点速度不为零及插补的离散特征,线段最后插补点与终点不能自然重合,若强行把终点作为最后插补点,可能带来速度冲击.为解决这一问题,本文提出了一种全新的处理方法,在确保没有速度冲击的前提下,允许插补点不通过线段终点,简化了插补算法.该方法产生的最大轮廓误差仅取决于最大加速度及插补周期,在实际系统中进行误差控制十分方便.

Inflexion Problem in High-Speed Machining of Small Line Blocks

In order to improve machining speed of small line blocks,the feed rate at the end of a line would be nonzero according to CNC interpolation algorithm.Because interpolation is a discrete process,the end point of the line cannot be used as an interpolation point exactly.If the end point was defined as an interpolation point compulsively,there may be a speed impact.Therefore,a new method was presented in this paper to solve the problem,which made the end point no more an interpolation point and simplified the ...