An Investigation on the Kinematics of Tool-Workepiece’s Relative Movement in One-Directional Ultrasonic-Vibration Assisted Turning

Razavi, Hamed; Nategh, Mohammad Javad; Abdullah, Amir; Soleimanimehr, Hameid

An Investigation on the Kinematics of Tool-Workepiece’s Relative Movement in One-Directional Ultrasonic-Vibration Assisted Turning

Authors

Hamed Razavi ¹

Mohammad Javad Nategh ²

Amir Abdullah ³

Hameid Soleimanimehr ¹

¹ Ph.D. Student, Mechanical Engineering Department, Faculty of Engineering, Tarbiat Modares University

² Assoc. Prof., Mechanical Engineering Department, Faculty of Engineering, Tarbiat Modares University

³ Assoc. Prof., Faculty of Mechanical Engineering, Amirkabir University of Technology

Abstract

The aim of present study is to investigate the kinematics of tool-workpiece’s relative movement in conventional and ultrasonic-vibration assisted turning (UAT). The kinematic analysis of UAT shows that the movement of cutting tool edge relative to the workpiece resulted from the cutting speed, feed speed and tool’s vibration affects the lateral machined surface of workepiece and leaves a repeating pattern of crushed and toothed regions on it. This results in an increase in the surface hardness of the lateral machined surface in comparison with conventional turning (CT). A model of the tool-workpiece’s relative movement has first been developed in the present study. This model predicts a surface hardening effect for the lateral surface in UAT in comparison with CT. Several experiments were subsequently carried out employing a surface micro-hardness testing machine and an optical microscope to verify the predicted results.

Keywords

Ultrasonic-Vibration Assisted Turning

kinematics

Lateral machined Surface