基于曲率分段的发动机凸轮磨削步长优化算法

提出一种改进凸轮磨削加工效率和精度的新算法.该算法根据加工精度要求，利用砂轮相对凸轮转角的运动轨迹的曲率计算各加工转角下的最大允许转角步长，并对凸轮加工转角进行分段，优化加工转角步长和转速.与恒转速法相比，有效减少加工中的冗余步长，提高加工转速，改善加工效率，并避免恒转速法在凸轮上升段及下降段与缓冲段相接处的精度不足及砂轮架加速度过大所致的响应滞后问题，保证凸轮加工精度和加工效率.

A Step Optimization Method for Engine Camshaft Grinding Based on Curvature Segmentation

A new method to improve engine camshaft grinding efficiency and processing accuracy was proposed on the basis of maximum allowable angle steps. The angle step value was calculated from the local curvature of grinding wheel center motion curve relative to camshaft processing angle. Then, the cam was processed segmentally to optimize its processing angle step and speed. Compared with constant angular velocity grinding, this new method can reduce superfluous steps and increase manufacture efficiency. Moreover, it can also improve the processing accuracy and avoid the response lag on buffer portion linking to ascent portion and descent portion of cam.