R型中心孔在精密轴类零件中的应用  

Application of R-type center hole in precision shaft parts

作　　者：严冰玉 张剑利 李凤侠 YAN Bing-yu;ZHANG Jian-li;LI Feng-xia(Xi'an aviation brake technology Co.,Ltd,Xingping 713106,China)

机构地区：[1]西安航空制动科技有限公司,陕西兴平713106

出　　处：《世界有色金属》2021年第13期220-222,共3页World Nonferrous Metals

摘　　要：在外圆磨床上,采用两顶尖磨削精密轴类零件外圆时,外圆尺寸的精度难以保证,零件外圆的圆柱度不易控制,特别是零件表面有镀铬要求的零件,精磨时,发现零件表面存在无铬层现象。通过分析,改变中心孔的形状,将A型中心孔改为R型中心孔,加工零件尺寸精度、圆柱度一致性较好,能够满足图纸精度要求。When two centers are used to grind the outer circle of precision shaft parts on the cylindrical grinder,the accuracy of the outer circle size is difficult to ensure,and the cylindricity of the outer circle of the parts is not easy to control,especially for the parts with chromium plating requirements on the part surface,it is found that there is no chromium layer on the part surface during fine grinding.Through analysis,by changing the shape of the center hole and changing the A-type center hole to R-type center hole,the dimensional accuracy and cylindricity of the machined parts are consistent,which can meet the accuracy requirements of the drawing.

关 键 词：中心孔 拉杆 中心钻 

分 类 号：TG713.02[金属学及工艺—刀具与模具]