Satoshi Oda

Limit transmissible torque in the traction drive of a concave and convex roller pair

This paper presents a study on the limit transmissible torque in the traction drive of concave-convex roller pair. The transmitted torque, the specific sliding, the roller surface temperature and the oil film formation under different contact pressures and roller speeds were simultaneously measured by carrying out a concave-convex roller test. Effect of the lubricant on the limit transmissible torque of the concave-convex roller pair was investigated. Furthermore, the experimental results were compared with the theoretical ones based on the thermal elastohydrodynamic lubrication theory, which takes account of the effects of viscous heating and Eyring viscosity. Close agreement between the theoretical and experimental results was obtained.

F-0334 Simulation of Induction Hardening Process of Sintered Metal Shafts

Abstract. A FEM simulation program for induction hardening of sintered metal shafts was made up. Physical properties of the sintered metal were measured. An electromagnetic field analysis, a heat conduction analysis and an elastic-plastic stress analysis during the induction hardening process of sintered metal shafts were carried out for various hardening conditions by using the measured material data and the simulation program. The effects of the electric power and the frequency on the temperature and the stress during the induction hardening process of the sintered metal shaft and the residual stress were examined. The map for selecting the optimum heating condition (P, f) for the residual stress of the sintered metal shaft due to the induction hardening was indicated.