Kinematics analysis of ultrasonic vibration assisted Micro Milling

• 1、Department of Mechanical Engineering, Shandong University, Jinan, 250061

Abstract：In this paper, exploratory study on one-direction ultrasonic vibration assisted micro-milling based on existing experiment condition. The purpose of this research is to explore a new way of improving cutting condition of micro-milling and alleviate these difficult problems restricting the development and application of micro-milling in different fields. Considering that less axial cutting depth is often adopted when milling small parts, neglecting the effect of helix angle, two-dimensional calculation of the trajectory of tool tip was made by studying normal direction vibration mode and feed direction vibration mode respectively. A proposed chip thickness mathematic model was built. The characteristics of milling force under the two different vibration modes was also discussed. As a result, the optimal vibration mode was pointed. A slot milling experiment was then carried out to prove theoretical analysis conclusions. The effects of ultrasonic vibration on the peak values of component forces in feed/normal direction were experimentally studied. Then a statistical model of the maximum resultant force was build.

Keywords： Cutting Theory Micro Milling Ultrasonic Vibration Kinematics Analysis