The Three Dimensional CAD Of The Globodial Cam And Its Profile Correction

The globoidal cam mechanism is a kind of high speed cam mechanism with bright future in application. It can be used as high speed intermittent indexing with great accuracy, or used as efficient large torque reducer. And now it has been applied comprehensively in many automotive machines, such as tobacco machines, packaging machines , automatic tool changers of CNC machines, and so on.Globoidal Cam Mechanism(GCM) was invented by C.N.Neklutin, an American in the 1920s. USSR, U.K, Hungary, Switzerland and Japan began to study it successively, and founded special academy agencies and manufactories. Though our country was late to study it, which began until the late 70s, we have acquired great progress in the design ,examine, manufacture of GCM, especially in the explore of its novel structure.From the aspect of geometry, structure design, manufacture and examine, this paper generally summarizes the GCM's study progress in detail, discusses its kinetic rule and the determination of its primary structure parameter, and educes its surface equation and pressure angle equation based on the homogeneous matrix transformation and the conjugate engagement theory of spatial surface. On the basis of geometry study of GCM, the paper makes a comprehensive analysis to the interference phenomenon that will possible exist in the assemble course of two different structure of GCM with the help of Matlab software. Furthermore, the paper constructs a 3D CAD software of two different structures of GCM using the redevelopment module of UG . the paper explores the inner globoidal cam, educes its profile equations and pressure angle equations, and programs its 3D CAD software applying the redevelopment module of UG too .