Abstract
As the two most important indexes of bearing raceway, surface roughness and roundness have significant influence on bearing noise. Some researchers have carried out studies in this field, however, reason and extent of the influence of raceway surface geometric characteristics on bearing running noise are not perfectly clear up to now. In this paper, the raceway of 6309 type bearing’s inner and outer ring is machined by floating abrasive polishing adopting soft abrasive pad. Surface roughness parameters, arithmetical mean deviation of the profile R a, the point height of irregularities R z, maximum height of the profile R max and roundness f of raceways, are measured before and after machining, and the change rules of the measured results are studied. The study results show that the floating abrasive polishing can reduce the surface geometric errors of bearing raceway evidently. The roundness error is reduced by 25%, R max value is reduced by 35.5%, R z value is reduced by 22% and R a value is reduced by 5%. By analyzing the change of the geometrical parameters and the shape difference of the raceway before and after machining, it is found that the floating abrasive polishing method can affect the roundness error mainly by modifying the local deviation of the raceway’s surface profile. Bearings with different raceway surface geometrical parameter value are assembled and the running noise is tested. The test results show that R a has a little, R max and R z have a measurable, and the roundness error has a significant influence on the running noise. From the viewpoint of controlling bearings’ running noise, raceway roundness error should be strictly controlled, and for the surface roughness parameters, R max and R z should be mainly controlled. This paper proposes an effective method to obtain the low noise bearing by machining the raceway with floating abrasive polishing after super finishing.
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Supported by National Natural Science Foundation of China (Grant No. 51275062) and Open Foundation of Tsinghua University State Key Laboratory of Tribology of China (Grant No. SKLTKF11B08)
PANG Guibing, born in 1975, is currently an associate professor at School of Mechanical Engineering and Automation, Dalian Polytechnic University, China. His main research interests include precision machining, non-traditional machining and mold & die technology.
QI Xuezhi, born in 1987, is currently a master candidate at Dalian Polytechnic University, China.
MA Qinyi, born in 1978, is currently a lecturer at School of Mechanical Engineering and Automation, Dalian Polytechnic University, China. Her research interests include CAD/CAE and knowledge engineering.
ZHAO Xiujun, born in 1979, is currently a lecturer at Dalian Polytechnic University, China. Her research interests include non-traditional machining and mold technology.
WEN Chunsheng, born in 1954, is currently an engineer at Dalian Wazhou Precision Motor & Automobile Bearing Co., Ltd, China. His research interests include precision machining and bearing manufacturing technology.
XU Wenji, born in 1964, is currently a professor and a PhD candidate supervisor at Key Laboratory for Precision & Non-traditional Machining of Ministry of Education, Dalian University of Technology, China. His main research interests include non-traditional machining and equipment manufacturing.
PENG Yanping, born in 1962, is currently a professor at School of Mechanical Engineering and Automation, Dalian Polytechnic University, China. His research interests include precision machining and non-traditional machining.
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Pang, G., Qi, X., Ma, Q. et al. Surface roughness and roundness of bearing raceway machined by floating abrasive polishing and their effects on bearing’s running noise. Chin. J. Mech. Eng. 27, 543–550 (2014). https://doi.org/10.3901/CJME.2014.03.543
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DOI: https://doi.org/10.3901/CJME.2014.03.543