Lapping Machining of High-Speed and High-Precision Ceramic Bearing Balls

Abstract:

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In resent years, ceramic balls have been applied into precision bearings and other parts far and wide because of its advantages in light weight, high hardness, abrasive resistance, high-temperature resistance, corrosion resistance, little heat expansion coefficient and so on. The high-precision ceramic balls are machined by lapping usually, and the method of lapping has an important influence on the machining precision and efficiency of ceramic balls. In order to improve the precision and efficiency of ceramic ball machining, in the paper, a new cone lapping method is researched by the lapping experiment. The research result shows that the cone method is the optimal lapping method with high precision, high efficiency and the very simple machine. Furthermore, the mechanics characteristic of the cone lapping method have been analyzed and summarized, which will provide the basic principle and theoretical basis for the choice of primary geometry and mechanics parameter in the process of ceramic balls lapping.

Info:

Periodical:

Key Engineering Materials (Volumes 291-292)

Edited by:

Yury M. Baron, Jun'ichi Tamaki and Tsunemoto Kuriyagawa

Pages:

325-330

DOI:

10.4028/www.scientific.net/KEM.291-292.325

Citation:

Y. H. Wu et al., "Lapping Machining of High-Speed and High-Precision Ceramic Bearing Balls", Key Engineering Materials, Vols. 291-292, pp. 325-330, 2005

Online since:

August 2005

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Price:

$35.00

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[2] Y. Maeda: KOYO Engineering Journal Vol. 158E (2001), p.42.

[3] Y.H. Wu: Hot-Isocratic Pressed Silicon Nitride Ceramic Ball Bearings (Liaoning Education Pulication, China 2003).

[4] Y.H. Wu, K. Zhang, H. Sun: Key Engineering Materials Vol. 202 (2001), pp.185-0.

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6 160 270 450 800 140025004000 speed n (r/min) sphericity error Δδ(µm) 0.

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25 diameter removal rate Δ d(μ m/min)Δ δ Δ d Ps= 5. 5 N/ball 170# /200# 0.

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6 2. 5 3. 5 4. 5 5. 5 6. 5 7. 5 8. 5 pressure Ps (N/ball) sphericity error Δδ(µm) 0.

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25 diameter removal rate Δ d(μ m/min) Δ δ Δ d n= 800r/min 170# /200# Fig. 6 Relationship of sphericity error, diameter removal rate and lapping pressure Fig. 7 Relationship of sphericity error, diameter removal rate and lapping speed.

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