基于运动仿真的凸轮机构参数逆向CAD方法

摘要

A CAD reversing method to obtain parameters of the follower motion rule and cam lift-retum angles of cam mechanism by using motion simulation and measuring data of the original cam contour is presented,and then a new cam contour is designed analytically using both the motion parameters and the structure's dimensions. Processes to dynamically simulate and to obtain motion parameters of cam mechanism are introduced based on Pro/E. The results indicate that the method can promote precision and efficiency of cam profile design,and it can be directly applied to practice.%提出了利用机构运动仿真和实测模型获取平面盘形凸轮从动件运动规律和动程角等运动参数,再利用这些运动参数和有关结构尺寸,重新解析设计的逆向CAD方法,给出了在Pro/E软件平台上实现凸轮机构运动仿真和获取机构运动参数的过程.应用实例证明该方法高效直观,所设计的凸轮机构精度高,可直接用于生产.