Analysis of the Velocity of Micro–parts on Vibration Surface with the Vibrating Amplitude and Geometry Parameters

Phuong Hoai Le* Thien Xuan Dinh** Atsushi Mitani*** and Shinichi Hirai* * Department of Robotics, Ritsumeikan University, Kusatsu, Shiga,Japan E-mail:[email protected] **Department of Mechanical Engineering, Ritsumeikan University, Kusatsu, Shiga, Japan *** Department of Design, Sapporo City University, Sapporo, Japan In this work, we study experimentally the effect of the non-dimensional parameters of saw-tooth surface and micro-part and the effect of amplitude vibration on the motion of micro-parts. The dimensionless quantities are functions of the range of saw-tooth pitch, p, and micro-part length, l. The experiments are performed for these scale with a range of exciting frequency applied to the surface, f. By the use of particle tracking velocimetry method, we can achieve time-dependent velocity, and then ensemble-averaged velocity of the micro-parts. In addition, the method to determine the value of amplitude vibration at a range of exciting frequency is also introduced. The experimental results show that for different l and p but the same relative scale l/p, the profiles of micro-part velocity against the characteristic surface velocity pf are similar. It seems that the motion of micro-part depends on characteristic surface velocity pf than the relative scale l/p. We also observed that the feeding velocity of the micro-part and the amplitude were maximum in the same frequency range.