有序微槽结构电镀砂轮缓进给磨削窄深槽研究  

Creep-feed Grinding of Narrow Deep Grooves Using Electroplated Grinding Wheel with Orderly-micro-grooves

作　　者：刘超[1] LIU Chao(College of Automotive and Mechanical Engineering,Changsha University of Science and Technology,Changsha 410004,China)

机构地区：[1]长沙理工大学汽车与机械工程学院,长沙410004

出　　处：《机械工程师》2022年第12期27-30,共4页Mechanical Engineer

摘　　要：为提高窄深槽结构类零件的磨削质量,选用4 mm宽的有序微槽结构电镀砂轮和传统电镀砂轮,开展了淬硬轴承钢GCr15窄深槽缓进给磨削实验,研究了磨削深度、工件速度等参数对磨削力的影响,探讨了窄深槽表面粗糙度、表面形貌、白层厚度及显微硬度的变化规律。实验结果表明:当磨削深度和工件速度较小时,有序微槽砂轮的磨削力小于传统砂轮;而当磨削深度和工件速度较大时,有序微槽砂轮的磨削力大于传统砂轮。两种砂轮磨削下的窄深槽侧面粗糙度值相差不大,有序微槽砂轮磨削窄深槽的底面粗糙度略有增大。相比于传统砂轮,使用有序微槽砂轮能抑制窄深槽表面烧伤和材料粘附等缺陷,减小白层厚度,降低显微硬度。In order to improve the grinding quality of narrow deep groove structural parts,the experiments of creep-feed grinding(CFG)narrow deep grooves of hardened bearing steel GCr15 is carried out using electroplated grinding wheels with orderly-micro-grooves and traditional electroplated grinding wheels(both 4 mm in width)respectively.The effect of grinding depth and workpiece speed on grinding force is studied,and the variation law of surface roughness,surface morphology,white layer thickness and microhardness of narrow deep groove is also investigated.The experimental results show that when the grinding depth and workpiece speed are small,the grinding force of the grinding wheel with orderly-micro-grooves is less than that of the traditional grinding wheel.And the grinding force of the grinding wheel with orderly-micro-grooves exceeds that of the traditional grinding wheel when the grinding depth and workpiece speed are large.There is little difference in the side surface roughness of the narrow deep grooves ground by the two types of grinding wheels,and the surface roughness at the bottom of the narrow deep grooves is slightly larger using the grinding wheel with orderly-micro-grooves.Compared with traditional grinding wheels,the use of the grinding wheel with orderly-micro-grooves suppresses defects such as burns and material adhesion on the surface of narrow deep grooves,and the thickness of white layer and microhardness are reduced.

关 键 词：砂轮 有序微槽结构 缓进给磨削 窄深槽 磨削质量 

分 类 号：TG580.6[金属学及工艺—金属切削加工及机床]