圆锥滚子贯穿式超精研加工特性分析  

Processing Characteristic Analysis on Through-Feed Superfinishing of Tapered Rollers

作　　者：薛进学[1] 杨柏松[1] 王李娜[1] 张颖[1] 

机构地区：[1]河南科技大学机电工程学院,河南洛阳471003

出　　处：《轴承》2017年第6期21-26,共6页Bearing

基　　金：国家自然科学基金项目(51475145;U1404517)

摘　　要：基于圆锥滚子贯穿式超精研基本规律,计算油石与滚子周向接触弧长,建立动态有效磨刃数模型及未变形切削厚度模型,分析关键参数对周向接触弧长、动态有效磨刃数及未变形切削厚度的影响。分析结果表明:油石切入加工表面深度和滚子直径对周向接触弧长和动态有效磨刃数的影响最大且呈正相关;未变形切削厚度随切入加工表面深度的增大而增大,随滚子直径的增大而减小。基于分析结果,通过合理改变切入加工表面深度,一方面控制动态有效磨刃沿滚子轴向的分布,能够将滚子素线加工成理想的凸度形状;另一方面控制未变形切削厚度,进而使比切削能、工件表面残余应力及粗糙度等达到理想要求。Based on the regularity of through - feed superfinishing of tapered rollers, the circumferential contact arc length between oilstones and rollers is calculated, and the dynamic valid cutting edge number and the undeformed chip thickness model are built. The influences of key parameters on circumferential contact arc length, dynamic valid cutting edge numbers and undeformed chip thickness are analyzed. The results are given as follow. The diameter of rollers and the cutting surface depth of oilstones are the greatest influential parameters on circumferential contact arc length and dy- namic valid cutting edge numbers, and they are positively correlated. The undeformed chip thickness increases with in- crease of the cutting surface depth, but is negatively correlated with the diameter of rollers. The dynamic valid cutting edge can be changed to, on the one hand, control the distribution of dynamic valid cutting edge along the axial direction and machine the roller generatrix into perfect crown shape, on the other hand, control the undeformed chip thickness and keep the specific cutting energy, the surface residual stress and the surface roughness of workpieces into a reasona- ble state.

关 键 词：圆锥滚子 贯穿式超精研 凸度 油石 动态有效磨刃数 未变形切削厚度 

分 类 号：TH133.33[机械工程—机械制造及自动化]