Profile Design of Groove Cam with Roller Follower

To determine the size of the cam mechanism is an important task of the cam designer to produce the contour of the cam with high precision. There are two major factors which affect cam size, the pressure angle and the radius of curvature. Both of these involve either the base circle radius on the cam Rb when using flat-faced follower, or the prime circle radius on the cam Rp when using roller or curved followers. Therefore, the paper presents the relations between the geometric parameters and the cam angles of the groove cam mechanism are established. To calculate each contact point at any instant moment by using the method according to velocity and geometric relationship of instant velocity centers. Hence the cam profile was defined by contouring of the contact points. Moreover, a design example of constant-diameter groove cam is illustrated in this article.