平面カムの輪郭成形法 : 第1報,直線補間制御点の決定

抄録

Planar cams are typically machined by NC machine tools using linear and circular interpolation functions. This causes polygon-shaped cams which sometimes are not acceptable for industrial use due to the large vibration of cam follower members. There are no general guidelines to define the control point of the polygon to obtain reasonable error between the polygon and the theoretical contour of the cam. First, the error defined by the linear interpolation on Cartesian and polar coordinates is introduced for the guiedlines. Then, two novel methods are established to define the contour of cams. One gives equal error over the entire contour of the cam. The other equally divides the contour with acceptable error. The result of the simulation using four different types of planar cam mechanism shows the advantages of these methods, such as the smaller number of necessary data than in the conventional techniques.