基于曲率分段的发动机凸轮磨削步长优化算法  

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

作　　者：杨靖[1] 陈立锋[1] 李克[1,2] 张志雄[1] 

机构地区：[1]湖南大学机械与运载工程学院,湖南长沙410082 [2]湖南大学国家高效磨削工程技术研究中心,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2013年第11期46-50,共5页Journal of Hunan University:Natural Sciences

基　　金：国家高技术研究发展计划(863计划)资助项目(2008AA11A114)

摘　　要：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 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.

关 键 词：发动机 凸轮磨削 曲率分段 步长优化 转速优化 

分 类 号：TG580.1[金属学及工艺—金属切削加工及机床]