| CHI Yu-lun,YU Xin,LIU Bin,WU Zi-xuan.Grinding Material Removal Rate Model and Application Experiment Based on Bearing Blank Surface Analysis[J],52(4):338-353, 373 |
| Grinding Material Removal Rate Model and Application Experiment Based on Bearing Blank Surface Analysis |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.04.030 |
| KeyWord:bearing ring blank surface analysis grinding material removal rate model experimental study |
| Author | Institution |
| CHI Yu-lun |
University of Shanghai for Science and Technology, Shanghai , China |
| YU Xin |
University of Shanghai for Science and Technology, Shanghai , China |
| LIU Bin |
University of Shanghai for Science and Technology, Shanghai , China |
| WU Zi-xuan |
University of Shanghai for Science and Technology, Shanghai , China |
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| Abstract: |
| As one of the core parts of the bearing, the groove machining accuracy and surface quality of the bearing ring seriously affect the service life of the bearing. Grinding has become the main way of precision machining of the bearing ring because it can make the ground parts obtain high machining accuracy and small surface roughness value. In the actual grinding process of bearing ring, the surface deformation of rough parts made by turning and heat treatment will have an important impact on the removal of grinding materials. The traditional grinding material removal rate model based on dynamic model only considers the elastic deformation of grinding workpiece, grinding wheel and machine tool, but does not consider the effects of irregular surface deformation of rough parts on the model, this leads to the poor effect of the traditional theoretical model in practical grinding application. In view of the problem, a new grinding material removal rate model is established to experiment research based on the bearing ring surface shape analysis. Firstly, according to the manufacturing process of the bearing ring, the deformation law of blank parts was analyzed, that was, the grinding track of bearing ring blank parts was composed of multiple eccentric circles, and the theoretical basis for calculating the eccentric number of bearing ring was put forward. The variation law of grinding force and material removal rate in the actual grinding process was studied, which was affected by the irregular deformation and eccentricity of bearing ring. Secondly, aiming at the surface irregular shape, elastic deformation and material removal of rough parts in the rough grinding stage, a grinding material removal rate model in the form of piecewise function was proposed. The model fully considerred the effects of the surface irregular deformation and eccentric circle shape of bearing ring rough parts in the grinding stage, which could effectively reflect the actual grinding condition of bearing ring. Finally, the inner diameter and roundness of the bearing ring blank parts were measured, and the grinding monitoring experimental platform was built to collect the characteristic signals of each sensor in grinding. Through a large number of experiments, the grinding material removal rate model in the form of piecewise function was experimentally studied. The sensor signals in the full contact grinding stage between the grinding wheel and the workpiece were analyzed, and the correction method of the traditional grinding material removal rate model was proposed to make it more effective to reflect the grinding material removal rate of the bearing ring in the full contact grinding stage between the grinding wheel and the workpiece. Compared with the traditional grinding material removal rate model (GPSM), the grinding material removal rate model in the form of piecewise function established in this paper had higher accuracy (than 96%). The model can be used to quantify the eccentric surface of the bearing and the effective size of the eccentric ring in on-line grinding. The piecewise function model established in this paper fully considers the change of material removal rate of bearing ring in the actual grinding process, which can not only guide the production and manufacturing of bearing ring blank parts to a certain extent, but also has important significance to improve the grinding quality and grinding efficiency. |
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