Design and Fabrication of an Aerodynamic Micro-air Journal Bearing Using Micro-Wire Electrical Discharge Machining
This paper proposed a removal analysis and a contouring strategy of accurate micro-WEDM processing for an aerodynamic micro-air journal bearing for micro-gas turbine engine.It is designed based on aerodynamic theory and can be self-acting by the compressed air pressure.The rotor is stably rotated in a relatively low speed which is below one hundred thousand revolutions per minute,and is much lower than other references.The extended and trimmed tool path is adopted in this paper,and the cusp at the corner of the micro-air journal bearing is obtained by this method which is better than the common arc tool path.The inner and outer diameter of the micro-air journal bearing with a satisfactory shape and good surface quality is 1.068mm and 1.165mm,respectively.The minimum radius at the bottom of wedged-structure is 15.9μm.The kerf of the blanking is 43μm,and the machining discharge gap is 18μm under this machining conditions.The MRR is calculated based on the mathematical model and the experimental data,which is 0.00144mm2/min.
micro-air journal bearing micro-wire electrical discharge machining tool path
Wang Zhenlong Zeng Zhaoqi Wang Yukui He Xiaolong
Key Laboratory of Micro-systems and Micro-structures Manufacturing(Harbin Institute ofTechnology), Ministry of Education, Harbin, China, 150001;School of Mechanical Engineering, Harbin Institute of Technology, Harbin, China, 150001
国际会议
中国微米纳米技术学会第14届学术年会、第3届国际年会暨第6届微米纳米技术“创新与产业化国际研讨与展览会(CSMNT2012 & ICMAN2012)
杭州
英文
1-6
2012-11-04（万方平台首次上网日期，不代表论文的发表时间）