氮化硅陶瓷轴承套圈沟道超精加工工艺参数优化研究

Study on the optimization of the technological parameters of the groove superfinishing of silicon nitride ceramic bearing rings

为获得较小的沟道表面粗糙度值,通过正交实验,研究超精加工过程的工艺参数对超精加工后的氮化硅陶瓷轴承套圈沟道表面粗糙度Ra的影响。以Ra为评价指标,根据正交实验得到超精加工过程中各工艺参数对Ra的影响程度并从大到小排列,依次为超精加工时间、油石压力、工件切线速度、长行程摆荡频率以及短行程振荡频率;建议最优超精加工工艺参数组合为超精加工时间10 s、工件切线速度625 m/min、油石压力0.6 MPa、长行程摆荡频率700次/分钟和短行程振荡频率2450次/分钟。在最优超精加工工艺参数组合下超精加工后的轴承套圈沟道表面粗糙度为Ra 0.0355μm,改善率为90.80%。

In order to obtain a better surface roughness of groove,the influence of the technological parameters of the superfinishing process on the Ra of the groove surface of silicon nitride ceramic bearing rings after the superfinishing was studied by means of orthogonal experiment.Take Ra as the evaluation index,according to the orthogonal experiment,the influence degree of each technological parameter on Ra in superfinishing process was arranged from large to small in order:superfinishing time,superfinishing stone pressure,tangential velocity of workpiece,long oscillating frequency and short oscillating frequency.The optimum parameters for superfinishing are superfinishing time:10 s,tangential velocity of workpiece:625 m/min,superfinishing stone pressure:0.6 MPa,long oscillating frequency:700 U/min and short oscillating frequency:2450 U/min.Under the optimal combination of superfinishing process parameters,the groove surface roughness is Ra 0.0355μm and the improvement rate is 90.80%.