硬质合金麻花钻曲线切削刃压痕阴极电解钝化研究  

Research of Indentation Cathode for Electrochemical Edge Honing to Carbide Drill with Curved Cutting Edge

作　　者：吴昱君 李铸宇[1] 张伟[1] 张羽霄 陈传伟 Wu Yujun;Li Zhuyu;Zhang Wei;Zhang Yuxiao;Chen Chuanwei(Dalian Polytechnic University,Dalian,Liaoning 116033,China;不详)

机构地区：[1]大连工业大学,辽宁省大连市116033

出　　处：《工具技术》2021年第5期38-42,共5页Tool Engineering

摘　　要：提出一种压痕阴极电解钝化硬质合金麻花钻刃口的新工艺,利用锡箔拓印刃口压痕来适应麻花钻不同形状的曲线切削刃。研究了电解时间、电压和电极间隙等参数对刃口钝圆半径的影响。结果表明,采用压痕阴极电解钝化K10硬质合金,比相同条件下毛刷钝化时间缩短42%,钝化半径一致性好,刃口表面的粗糙度值降低1倍。在钻削42CrMo时,电解钝化麻花钻产生的切屑较短,断屑性能优于毛刷钝化钻头;两种钝化钻头产生的轴向力和扭矩相当,而电解钝化钻头的耐用度提高了50%。新的电解钝化设备简单,可广泛适用于车刀、铣刀等其它曲线切削刃刀具的钝化处理。In this paper, a novel indentation cathode for cutting edge honing is proposed.A foil cathode, covered by the pottery clay, is used to form the indentation of the different curved cutting edges of drills.The influence of different electrochemical parameters, such as voltage, time and electrode gap, on the honed edge radius is investigated.The radii of electrochemically honed edges are identical and the honing time is 42% shorter in comparison with that by brushing method.The SEM microscopic images show that roughness of the honed surface is half less than that of the untreated surface near the cutting edge.When 42 CrMo steel is drilled, the chip of the electrochemically honed drill is shorter than that by brushed drills.Although the values of drilling forces and torsions are almost the same, the life of the electrochemically honed drill is enhanced by 50%,compared with that by brushed drills.The device and its operation are simple, so it can be used to some turning and milling tools commercially.

关 键 词：电解钝化 麻花钻 曲线刃 

分 类 号：TG519.56[金属学及工艺—金属切削加工及机床] TH162[机械工程—机械制造及自动化]