平面カムの輪郭成形法 : 第2報,カム輪郭の円弧接続による構成

抄録

Planar cams are typically machined by NC machine tools using linear and circular interpolation functions. This causes polygon-shaped cams. The misshaping of a cam causes poor dynamic characteristics at higher speed operation. Recently, industries have demanded higher-quality cams to achieve higher speed and higher accuracy. To meet those requirements, it is necessary to obtain a very smooth contour of the cam over the entire cam surface. One of the ways to obtain such a smooth contour is to use a circular arc for the segment between two control points which has a common normal vector with adjacent segments at the end points of the segment. In this study, the basic concept of a contour constituted by circular arc segments is introduced. Then, the calculating procedure to obtain the intermediate point which is the contact point of two circular arcs is shown. With this method, a smooth contour of the cam without edge can be obtained.