聚晶金刚石微细球头铣刀刃磨工艺参数优化  

Optimization of edge-grinding parameters of polycrystallinediamond micro ball-end mill

作　　者：杜宇超 梁志强[2] 陈建军 李玉 马丹 曹宇轩 李世迪 王西彬[2] DU Yuchao;LIANG Zhiqiang;CHEN Jianjun;LI Yu;MA Dan;CAO Yuxuan;LI Shidi;WANG Xibin(School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China;Key Laboratory of Fundamental Science for Advanced Machining, Beijing Institute of Technology,Beijing 100081, China;Shanxi Diesel Engine Industry Co . , Ltd . , Datong 037036, Shanxi, China)

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]北京理工大学先进加工技术国防重点学科实验室,北京100081 [3]山西柴油机工业有限责任公司,山西大同037036

出　　处：《金刚石与磨料磨具工程》2020年第5期35-41,共7页Diamond & Abrasives Engineering

基　　金：国家重点研发计划(2019YFB1311100);国家自然科学基金(51975053);基础科研项目(DEDPZF,DEDPHF)。

摘　　要：针对直径为0.5 mm的聚晶金刚石(PCD)微细球头铣刀刃磨质量控制问题,基于六轴数控刀具磨床几何运动原理,建立PCD微细球头铣刀的砂轮刃磨运动数学模型,开展PCD刀具精密刃磨正交试验,研究刃磨工艺参数对主轴负载率、刀具前刀面表面粗糙度、刀具刃口钝圆半径的影响规律。结果表明:磨削速度对主轴负载率以及刀具前刀面表面粗糙度的影响最为显著,提高磨削速度有利于获得较好的刀面质量;磨削深度对刃口钝圆半径的影响最为显著,减小磨削深度有利于获得锋利的刃口形状。通过合理选择刃磨工艺,PCD微细铣刀直径误差小于4.0μm,刀具钝圆半径为4.5μm,刀具角度误差小于1°,无明显刃磨损伤缺陷。Aiming at grinding quality control problem of the 0.5 mm diameter polycrystalline diamond micro ball-end mill,based on the geometric motion principle of six-axis CNC machine,a mathematical model for the grinding of PCD micro ball-end mill is established,orthogonal experiments are carried out to study the influence of the grinding parameters on the spindle load,the surface roughness of tool rake face,and the radius of micro ball-end mill cutting edge.The results show that the grinding speed has the most significant effect on the surface roughness and spindle load,and the grinding depth has the most significant effect on the radius of the cutting edge.With the optimized process parameters,the diameter error of PCD micro ball-end mill is less than 4.0μm,the radius of tool blunt circle is 4.5μm,the angle error of tool is less than 1°.The edge quality is complete without obvious grinding damage defects.

关 键 词：聚晶金刚石 微细刀具 刃磨质量 正交试验 参数优化 

分 类 号：TG71[金属学及工艺—刀具与模具] TG58