Nonlinear Dynamics Simulation of Globoidal Cam and Roller Follower Mechanism With Clearanance Using Different Material Properties

Abstract

The effect of contact different material properties for globoidal cam and roller follower system on the nonlinear dynamics phenomenon is investigated at different cam speeds and different follower guides’ clearances. The contact between the cam and the follower and between the follower and its guides are considered at different contact conditions. The optimal contact condition is selected based on the value of local Lyapunov exponent parameter. The impact and friction are considered in SolidWorks program based on the value of sliding contact velocity and kinetic coefficient of friction. The contact condition is steel dry, steel greasy, nylon, acrylic, aluminum dry, and aluminum greasy. The nonlinear dynamics and chaos is detected using phase-plane diagram and Poincare’ map. The trend of the nonlinear response of the follower displacement is discussed at different contact conditions. The more black dots in Poincare’ maps, the more detachment heights between the cam and the follower since the black dots are stationed around one area inside Poincare’ map. In phase-plane diagram, the follower displacement-velocity diverges with no limit of spiral cycles which gives indication that the motion is non-periodic and chaos.