Ultrasonic Machining Essay

Abstract

This paper presents the results of a study on the edge chipping thchickness in rotary ultrasonic machining of advance ceramics. The investigation is conducted by an paractical approach to understand the effect of support length on edge chipping size. The investigation results showed that edge quality can be improved by increasing the support length

Introduction

Since ancient times, the improvements in technology and applications of ceramics have progressively increased. Ceramics have played an important role in the progress of modern industries. An engineer can not imagine a world without ceramic because of its diversity and its use in fields; Electronics Telecommunications, Electricity, construction brick, cement, tile and glass, artificial bones, furnace, Pollution Control. Machining of ceramic materials is difficult due to its heterogeneity anisotropic,and heat sensitivity of the material and the high abrasiveness of the reinforcing fibres. This results in

in which the tool is operated as in normal drilling or turning operations. in addition, it is subjected to high frequency near 20 khz, small amplitude vibration. In this case, ultrasonic vibration of the tool are used to facilitate the traditional machining process.(Abrate & Walton

It can be seen that the chipping thickness is increases as the support length decreases. the chipping size can be reduced if it is possible to achieve maximum support length. In trial 1 there was minimum support length and chipping size obtained is large. in second trial there was done some improvement in chipping thickness. In trial 3 a full plate without any hole is placed below the workpiece and its improvement was detected. It was found that there is directly relationship between support length and chipping size on rod. The experiments results are shown in table