轴承钢内圆ELID磨削机理及工艺参数优化
2018-07-25
作者：关佳亮，戚泽海，孙晓楠，路文文
单位：北京工业大学
摘要：针对轴承钢内圆传统磨削加工方式存在的精度低、烧伤及裂纹等缺陷，本文采用ELID精密镜面磨削技术对其进行试验研究。在ELID精密镜面磨削机理及钝化膜生成速率模型的理论指导下，通过采用二次通用旋转组合方法对影响轴承钢内圆表面粗糙度的各工艺参数进行ELID磨削试验设计。利用DPS数据处理系统软件对试验结果进行分析得到表面粗糙度二次回归数学模型及各工艺参数对表面粗糙度的单因素影响规律。利用Lingo软件优化得到轴承钢内圆ELID磨削最佳工艺参数为砂轮线速度30m/s、电解电压75V、电解间隙02mm、占空比50%，在此最佳工艺参数下，磨削轴承钢内圆可获得表面粗糙度为13nm的已加工表面。
关键词：轴承钢；ELID磨削机理；钝化膜模型；工艺参数优化
中图分类号：TG580.11；TH161.14文献标志码：A
ELID Grinding Mechanism of Bearing Steel Internal and
Optimization of Process Parameters
Guan Jialiang，Qi Zehai，Sun Xiaonan，Lu Wenwen
Abstract:Aiming at low precision，burns，cracks and other defects of bearing steel internal traditional grinding processing methods，experimental research are carried out by precision mirror grinding technology of ELID in this article.Under the theory of precision mirror grinding mechanism of ELID and the rate model of ELID passive film，taking into account the impact of bearing steel internal surface roughness about process parameters ，ELID grinding experimental is designed by using the method of quadratic general rotary unitized design.
In order to get the secondary regression mathematical model and univariate influence of surface roughness，the experimental results are analyzed by using DPS data processing system software.Further，the optimum process parameters of bearing steel internal ELID grinding with the wheel speed is 30m/s，electrolytic voltage is 75V，electrolytic gap is 0.2um and duty ratio is 50% by Lingo software.And the machined surface roughness of Ra 13nm is obtained under the optimum process parameters.
Keywords:bearing steel；ELID grinding mechanism；model of ELID passive film；optimization of parameters