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This thesis presents a geometry design method to generate the surfaces
of the globoidal cam with the conical roller follower. Based on the
trace of the rigid body and the theory of diffential geometry, the conjugate
surfaces can be the offset surfaces of the ruled surface.
With diffenrent roller's axial height,
its radius and the meshing vector also be changed. For this reason,
the contact points on the outward roller are hard to find. To overcome
this problem, we propose the triangular graph with meshing angle, it
can present the vector quantity caused from the motion angle. We replace
it into the procedures of the rigid body transformation method to derive
the cam surfaces with the conical roller follower. Furthermore, two
models with modified sine and constant velocity motion curves are generated
and analyzed. |