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Research Papers

A Novel Lapping Method for High Precision Balls Based on Variable-Radius V-Groove

[+] Author and Article Information
Ping Zhao

e-mail: zhaoping@zjut.edu.cn

Weigang Guo

e-mail: guoweigang2004@126.com

Ming Feng

e-mail: fengming995@163.com

Binghai Lv

e-mail: icewater7812@126.com

Qianfa Deng

e-mail: dqfxm2003@126.com

Julong Yuan

e-mail: jlyuan@zjut.edu.cn
Zhejiang University of Technology,
Key Laboratory of E&M
Ministry of Education and Zhejiang Province,
Hangzhou 310014, China

1Zhao Ping, female, associate professor, focus on the ultra precision machining technology and equipment.

Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF Micro- AND Nano-Manufacturing. Manuscript received June 12, 2013; final manuscript received November 7, 2013; published online December 4, 2013. Assoc. Editor: Hitoshi Ohmori.

J. Micro Nano-Manuf 1(4), 041007 (Dec 04, 2013) (6 pages) Paper No: JMNM-13-1047; doi: 10.1115/1.4025991 History: Received June 12, 2013; Revised November 07, 2013

The precision ball is the most key component of ball bearing, which is widely used in many precision mechanical fields. This paper presents a variable-radius V-groove lapping method since this method can make the spin angle vary between 0 deg and 90 deg, and the lapping trajectory can cover the ball's surface. Based on this lapping method, an observation of lapping surface of balls experiment is set up in which blackened balls is brightened effectively only after 10 circulations of lower plate in 2 min. Next, another experiment is also done: A batch of G16 level steel balls has been lapped to G5 level in the machining experiment. All results illustrate that the novel method has properties of high efficiency, high precision, and high consistency, which needs further study and then it is likely to replace the traditional one in the future.

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References

Figures

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Fig. 1

Schematic diagram of the traditional V-groove lapping method

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Fig. 2

Contact geometry and kinematics of ball lapping

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Fig. 3

Schematic diagram of geometry of variable-radius V-groove trajectory

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Fig. 9

Results of balls processing experiment

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Fig. 8

Initial parameters of balls

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Fig. 7

Verification of lapping balls in the variable radius V-groove

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Fig. 6

Schematic diagram of experimental setup for lapping balls in the variable radius V-groove

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Fig. 5

The entire coverage of lapping trajectory over the surface of a ball

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Fig. 4

Simulation results of spin angle variation

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