高强钢变截面辊弯成形轮廓曲线插补算法与速度规划

High-Strength Steel Variable Cross Section Roll Forming Contour Curves Interpolation Algorithms and Velocity Algorithm

针对进给步长为单位短直线逼近实际曲线会引起弓高误差,提出一种限制弓高误差和根据曲率半径变化调整插补步长的轮廓曲线插补算法。鉴于单纯考虑轮廓曲线时,可能会导致单道次的最大速度,最大加速度超出设备极限值,综合分析多道次速度分布规律,找出速度敏感点,分析最佳加减速控制点,并考虑曲线连接点和变速距离等,提出加减速前瞻控制算法。回弹是板材成形内应力的释放结果,为了保证尺寸精度提出回弹补偿算法,试验结果表明,新的算法显著提高了轮廓曲线的插补精度、速度协调性和尺寸精度。

Because feeding step length which is a short straight line approaching actual curve causes bow high error, it proposes a contour curve interpolation algorithm which limits bow high error and adjusts the interpolation step size according to the radius of curvature change. For the reason that only considering contour curve can lead to a single channel of maximum speed, maximum acceleration beyond limit equipment, comprehensive analysis multi-channel of velocity distribution law, finding the velocity sensitive point, analyzing the best acceleration and deceleration control points, considering the curve points and the transmission distance, and a acceleration and deceleration predictive control algorithm is proposed. Spring back is the internal stress release result of sheet forming, in order to ensure the size precision, spring back compensation algorithm is put forward. Thee test results prove that the new method significantly improves the contour curves interpolation precision, speed of coordination and dimensional accuracy.