基于ELID磨削机理的GCr15轴承钢内圆工艺试验研究

摘要

针对GCr15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,文章采用ELID精密镜面磨削技术对其进行工艺试验研究.在ELID精密镜面磨削机理及钝化膜数学模型的理论指导下,进行正交试验探究磨削深度、砂轮线速度、电解电压及占空比对表面粗糙度的影响及其最优参数组合,并采用极差法分析探究各因素对工件磨削质量影响程度的大小.研究结果表明在磨削深度0.5μm,砂轮线速度30m/s,电解电压50V,占空比50%的最佳工艺参数下可获得表面粗糙度为13nm的已加工表面.%Aiming at low precision,burns,cracks and other defects of GCr15 steel internal traditional grind-ing processing methods,experimental research were carried out by Ultra-precision mirror grinding technology of ELID in this article. Under the theory of Ultra-precision mirror grinding mechanism of ELID and mathe-matical model of ELID passive film,orthogonal experiment were carried out in order to research the influ-ence of surface roughness about grinding depth、wheel speed、electrolytic voltage、duty ratio and Optimal technological parameters . And used range analysis to study the impact of various factors on the size of the prototype grinding quality. Studies show that the machined surface roughness of Ra13nm is obtained with the grinding depth of 0. 5μm,the wheel speed of 30m/s,the electrolytic voltage of 50Vand the duty ratio of 50%.