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  HomeContents of Chinese Journal of Mechanical Engineering (English Edition),2008 No.2MINITYPE MACHINING SYSTEM FOR DIAMOND LAPPING & POLISHINGBY USING BRUSHLESS DIRECT CURRENT MOTOR AS PRECISE SPINDLE

FU Huinan

CHEN Dongsheng

ZHAO Yong

LIN Binquan
School of Mechanical and Electrical Engineering,
Guangdong University of Technology
Guangzhou 510006, China

 

 

MINITYPE MACHINING SYSTEM FOR DIAMOND LAPPING & POLISHING
BY USING BRUSHLESS DIRECT CURRENT MOTOR AS PRECISE SPINDLE* 

 

Abstract: A minitype precise spindle system which can machine precisely and stably in the process of diamond lapping and polishing is designed. In such minitype spindle system, the brushless DC spindle motor is used to drive the lapping finish table, which is built with fluid dynamic bearings. Some measures have been taken to make the lapping system dynamic balance, and a servo controller which can adjust the speed of motor from 1 200 r/min to 5 400 r/min is designed. Experiments show that the spindle system is reliable and stable for diamond polishing, and the detection results by atomic force microscope(AFM) show that the surfaces of diamond edge’s Ra is 6.725 nm and whole diamond average Ra is 3.25 nm.

Key words: Diamond Lapping & polishing Spindle system

 


* This project is supported by National Natural Science Foundation of China(No. 50675037) and Plan of Science and Technology of Guangdong Province, China (No. 2003B12002). Received July 14, 2006; received in revised form November 15, 2007; accepted December 10, 2007

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Biographical notes

FU Huinan is currently a professor, master supervisor, in School of Mechanical and Electrical Engineering, Guangdong University of Technology, China. He received his PhD degree from School of Mechanical Engineering, Kobe University, Japan, in 1999. His research interests include micro-nano mechanical machining, measuring and devices for micro detecting, operation, and controlling, etc.
Tel: +86-20-39322417; E-mail: hnfu@gdut.edu.cn

CHEN Dongsheng is currently a graduate candidate in School of Mechanical and Electrical Engineering, Guangdong University of Technology, China. His research interest is precision lapping of diamond tool.
Tel: +86-13535054433; E-mail: mersak@tom.com

ZHAO Yong is currently a graduate candidate in School of Mechanical and Electrical Engineering, Guangdong University of Technology, China. His research interest is detecting of dynamic balance of spindle and auto-adjusting.
Tel: +86-20-39322417; E-mail: pausehao@163.com

LIN Binquan is currently a graduate candidate in School of Mechanical and Electrical Engineering, Guangdong University of Technology, China. His research interest is precision detection of the reorientation errors and auto-adjusting.
Tel: +86-20-39322417; E-mail: eix1@163.com


References


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[3] ZHANG Jingmin, DENG Weiping, LUO Nianwu. A simple and reliable method for tool grinding main shaft with crude diamond tool[J]. Mechanical Engineer, 2001 (1): 23-24. (in Chinese)
[4] SEAGATE. Using FDB motor: high revolutions, low noise[J]. Electronic Products, 2001, 3: 19-20. ( in Chinese)
[5] LIN Guo, CHEN Y D. Disk flutter and its impact on HDD servo performance[J]. IEEE Transactions on Magnetics, 2001, 37(2): 866-870. (in Chinese)
[6] YANG Zhibin. Speed control of electro-magnetic planar micromotor based on ML4426[J]. Servo Technique, 2004, 6: 37-46
[7] Micro Linear. Bi-directional sensorless BLDC motor controller[R]. 2000.


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