Synthesis of stationary cams

This paper presents a method for designing stationary cams with constant sp eed roller followers. A stationary cam is immovable, but it guides its foll ower to produce a desired motion with the follower being driven by other li nks. In order to avoid infinite jerk of the follower motion, the pitch curv e of a stationary cam should consist of pieces of transition curve, which p rovide gradual change in curvature and are interposed between straight line s and circular arcs. The general parametric equations of transition curves are derived and the cam design process is demonstrated. This method is appl icable for designing the guideways of tool magazine in automatic tool-chang ing system of the machine center.