Optimization experiment on eccentric lapping of cylindrical rollers
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摘要
Cylindrical rollers are important elements of bearings,and their machining accuracy and consistency affect the bearing quality.Using a GCr15 cylindrical roller ofФ11×12 as the processing object in this study,the effects of loading pressure,abrasive concentration,and speed combination on cylindrical roller machining precision were investigated using the orthogonal experimental design method on a double-side eccentric pendulum lapping and polishing machine.The machining parameters of the lapping stage were optimized,and the lapping optimal process parameters were determined by S/N response analysis and analysis of variance(ANOVA).The results show that when the experiment was optimized using loading pressure of 10 N/roller,abrasive concentrationof 20.0 wt%,and rotational speed combination,the material removal rate(MRR)of cylindrical roller reached 0.0896μm/min;the average roughness of the batch decreased from 0.056μm to 0.027μm,51.8%lower than the original batch average roughness,and the deviation decreased from the initial 0.022μm to 0.014μm;the batch average roundness error decreased from 0.47μm to 0.28μm,40.4%lower than the original batch average roundness error,and the deviation decreased from the initial 0.19μm to 0.038μm;and the batch average diameter variation decreased from 4.5μm to about 3.6μm,20%lower than the original batch average diameter variation.The double-side eccentric lapping of cylinder rollers does not only lead to improvement in the surface quality and shape accuracy of rollers,but also improvement in the batch consistency.
Cylindrical rollers are important elements of bearings,and their machining accuracy and consistency affect the bearing quality.Using a GCr15 cylindrical roller ofФ11×12 as the processing object in this study,the effects of loading pressure,abrasive concentration,and speed combination on cylindrical roller machining precision were investigated using the orthogonal experimental design method on a double-side eccentric pendulum lapping and polishing machine.The machining parameters of the lapping stage were optimized,and the lapping optimal process parameters were determined by S/N response analysis and analysis of variance(ANOVA).The results show that when the experiment was optimized using loading pressure of 10 N/roller,abrasive concentrationof 20.0 wt%,and rotational speed combination,the material removal rate(MRR)of cylindrical roller reached 0.0896μm/min;the average roughness of the batch decreased from 0.056μm to 0.027μm,51.8%lower than the original batch average roughness,and the deviation decreased from the initial 0.022μm to 0.014μm;the batch average roundness error decreased from 0.47μm to 0.28μm,40.4%lower than the original batch average roundness error,and the deviation decreased from the initial 0.19μm to 0.038μm;and the batch average diameter variation decreased from 4.5μm to about 3.6μm,20%lower than the original batch average diameter variation.The double-side eccentric lapping of cylinder rollers does not only lead to improvement in the surface quality and shape accuracy of rollers,but also improvement in the batch consistency.
Cylindrical rollers are important elements of bearings,and their machining accuracy and consistency affect the bearing quality.Using a GCr15 cylindrical roller ofФ11×12 as the processing object in this study,the effects of loading pressure,abrasive concentration,and speed combination on cylindrical roller machining precision were investigated using the orthogonal experimental design method on a double-side eccentric pendulum lapping and polishing machine.The machining parameters of the lapping stage were optimized,and the lapping optimal process parameters were determined by S/N response analysis and analysis of variance(ANOVA).The results show that when the experiment was optimized using loading pressure of 10 N/roller,abrasive concentrationof 20.0 wt%,and rotational speed combination,the material removal rate(MRR)of cylindrical roller reached 0.0896μm/min;the average roughness of the batch decreased from 0.056μm to 0.027μm,51.8%lower than the original batch average roughness,and the deviation decreased from the initial 0.022μm to 0.014μm;the batch average roundness error decreased from 0.47μm to 0.28μm,40.4%lower than the original batch average roundness error,and the deviation decreased from the initial 0.19μm to 0.038μm;and the batch average diameter variation decreased from 4.5μm to about 3.6μm,20%lower than the original batch average diameter variation.The double-side eccentric lapping of cylinder rollers does not only lead to improvement in the surface quality and shape accuracy of rollers,but also improvement in the batch consistency.
引文
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13.Wang H,Li HB,Jiao WC,et al.The finishing of rolling bearing raceway by electrochemical mechanical finishing(ECMF)technology.Adv Mater Res 2011;189-193:842-6.
14.Yuan JL,Yao WF,Zhao P,et al.Kinematics and trajectory of both-sides cylindrical lapping process in planetary motion type.Int J Mach Tool Manu 2015;92:60-71.
15.Yuan JL,Wu K,Lv BH,et al.Simulation and analysis of loading stability in both-sides cylindrical roller lapping mode,3.Transaction of the 7th MIRAI Conference on Microfabrication and Green Technology,Tokyo,Japan,3.;2014.p.4-9.
16.Yao WF.Study on processing method for high precision bearing rollers with high consistency based on uniform distribution of cylindrical processing trajectory.Hangzhou:School of Mechanical Engineering,Zhejiang University of Technology.2015.[in Chinese].
17.Chen GL,Chen GB,Li YH,et al.A study of thermal pyrolysis for castor meal using the Taguchi method.Energy 2014;71:62-70.
2.Shuo M.Roller manufacturing technology(1).Bearing,2.;1985.p.60-2..[in Chinese].
3.Ma Y,Chen R.Bearing manufacturing technology.Beijing:Tsinghua University Press.2008.[in Chinese].
4.Jacobs G,Plogmann M.Rolling bearing damages.Springer Berlin Heidelberg.2014.
5.Chen G,Wang B,Mao F.Effects of raceway roundness and roller diameter errors on clearance and run out of a cylindrical roller bearing.Proc Inst Mech Eng J 2013;227(3):275-85.
6.Ji P,Gao Y,Ma F,et al.Influences of roller diameter error on contact stress for cylindrical roller bearing.Proc Inst Mech Eng J 2015;229(6):689-97.
7.Yang X,Wu H.Technical requirements of rolling elements from rolling bearings.Bearing,8.;2010.p.57-61..[in Chinese].
8.Liu J,Yu X.Preparation and present situation analysis of bearing roller.Metal working:metal cutting,23.;2014.p.47-9..[in Chinese].
9.Zhao XH,Yao WF,Feng M,et al.Polishing process study of cylindrical rollers by using a double-side lapping machine.Light industry machinery,32(4).;2014.p.36-8..[in Chinese].
10.Gallego I,Lizarralde R,Barrenetxea D,et al.Precision,stability and productivity increase in through feed centerless grinding.CIRP Ann Manuf Technol 2006;55(1):351-4.
11.Hashimoto F,Gallego I,Oliveira JFG,et al.Advances in centerless grinding technology.CIRP Ann Manuf Technol 2012;61(2):747-70.
12.He YL.Preliminary study on grinding method of plate eccentric straight groove cylindrical roller.Tianjin:School of Mechanical Engineering,Tianjin University.2014.[in Chinese].
13.Wang H,Li HB,Jiao WC,et al.The finishing of rolling bearing raceway by electrochemical mechanical finishing(ECMF)technology.Adv Mater Res 2011;189-193:842-6.
14.Yuan JL,Yao WF,Zhao P,et al.Kinematics and trajectory of both-sides cylindrical lapping process in planetary motion type.Int J Mach Tool Manu 2015;92:60-71.
15.Yuan JL,Wu K,Lv BH,et al.Simulation and analysis of loading stability in both-sides cylindrical roller lapping mode,3.Transaction of the 7th MIRAI Conference on Microfabrication and Green Technology,Tokyo,Japan,3.;2014.p.4-9.
16.Yao WF.Study on processing method for high precision bearing rollers with high consistency based on uniform distribution of cylindrical processing trajectory.Hangzhou:School of Mechanical Engineering,Zhejiang University of Technology.2015.[in Chinese].
17.Chen GL,Chen GB,Li YH,et al.A study of thermal pyrolysis for castor meal using the Taguchi method.Energy 2014;71:62-70.