Title :
Study on Thermal Stress Removal Mechanisms of Hard and Brittle Materials During Ultrasonic Vibration Assisted EDM in Gas
Author :
Xu, Minggang ; Luo, Xueke ; Zhang, Jianhua
Author_Institution :
Shandong Univ., Jinan, China
Abstract :
The principle of Ultrasonic vibration assisted electrical discharge machining in gas medium (UEDM in gas) was proposed in this work and experimental equipment was designed. Hard and brittle materials such as cemented carbide and sintered Nd-Fe-B magnetic materials were machined using the experimental equipment of UEDM in gas. The thermal stress removal mechanisms of hard and brittle materials machined by UEDM in gas medium were discussed in detail. The process of thermal stress removal during UEDM in gas can be divided four steps, which are the formation of thermal stress, the formation of micro cracks, grain breaks and particles strips.
Keywords :
brittleness; cermets; electrical discharge machining; microcracks; thermal stress cracking; ultrasonic machining; vibrations; brittle materials; cemented carbide; electrical discharge machining; gas medium; grain breakage; hard materials; microcracks formation; particle strips formation; sintered magnetic materials; thermal stress removal mechanisms; ultrasonic vibration assisted EDM; Acoustics; Discharges; Machining; Materials; Stress; Thermal stresses; Vibrations; EDM; Thermal Stress Removal; gas; hard and brittle materials; material removal;
Conference_Titel :
Measuring Technology and Mechatronics Automation (ICMTMA), 2011 Third International Conference on
Conference_Location :
Shangshai
Print_ISBN :
978-1-4244-9010-3
DOI :
10.1109/ICMTMA.2011.720
