凸轮反求设计中的廓线修正

Profile Correction in the Reverse Design of the Cam

介绍了滚筒旋转式递纸机构反求设计时凸轮廓线修正的数据分析方法。由测绘所得的凸轮实际廓线的离散数据,推导出凸轮理论廓线值,应用数值分析方法计算出凸轮从动件的角位移及类加速度。将类加速度与期望类加速度值进行比较,得出类加速度误差,进而求得凸轮角位移误差。通过剔除角位移误差,对凸轮理论廓线进行修正,进而推导出所需的凸轮实际廓线值。误差修正后的凸轮廓线更接近原始设计。

A data analysis method of the cam profile correction in reverse design of rotary paper-transferring mecha- nism is presented. The profile curve can be deduced from the measurement data of the cam profile according to the cam design theory. Using numerical analysis method the angular displacement and quasi-acceleration of the cam follo- wer are calculated. Compared with the expected quasi-acceleration, the quasi-acceleration error and the angular dis- placement error can be obtained. The cam profile can be deduced from the profile curve by removing angular dis- placement error. Results show that the cam profile is closer to original design data after the error correction.