ROLLING FRICTION TORQUE IN MICROSYSTEMS

D. N. OLARU
dolaru@mail.tuiasi.ro

C. STAMATE
A. DUMITRASCU
Gh. PRISACARU


Department of Machine Elements and Mechatronics, Technical University “Gheorghe Asachi” – Iasi , ROMANIA

Abstract. To determine the rolling friction torque in the micro rolling systems, the authors developed an analytical model based on the dissipation of the inertial energy of a rotating microdisc in three rolling microballs. Using an original microtribometer with two steel rotating discs and three steel micro balls the rolling friction torque in dry conditions was determined for contacts loaded with normal forces of 8.68 mN to 33.2 mN and with rotational speed ranging between 30 to 210 rpm. The experimental results confirm the hypothesis that the rolling friction torque in dry contacts is not depending of the rotational speed.
 

Keywords:  rolling friction torque, microtribometer, dynamic modeling

References

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