Geometric and Kinematic Synthesis of Mechanisms with Rotary Disc Cam

摘要

A unifying method is presented of the geometrical and kinematic synthesis used for the exact design of the profile of the rotary disc-cam and translating or rotating follower. This method uses the direct movement of rotary cam, without a reversing movement of follower around the fix cam. This unifying method relies on the boundary conditions imposed by the follower using the movement law and the minimum transmission angle or maximum pressure angle. In the case of a roll follower, first the theoretical curve of the cam profile is calculated and then it is described in polar coordinates. All cases of mechanisms with translating, rotating follower, with roll or flat follower are considered. A phase displacement angle or de-phasing angle it highlighted. It is defined as the difference between the cam rotation angle and the position angle of vector radius, in the mobile system, which is stiffened by the cam.