【作者】 张少伟； 高长水；

【Author】 Zhang Shaowei,Gao Changshui (Nanjing University of Aeronautics &Astronautics,Nanjing 210016,China)

【机构】 南京航空航天大学机电学院；

【摘要】 聚晶金刚石(PCD)复合片的焊接和PCD微铣刀的刀刃成形是PCD微细立铣刀制造过程中的两个关键工艺。首先,采用有限元方法对微细立铣刀正常使用过程中焊缝部位的应力进行了计算;其次,通过高频感应钎焊正交试验,研究了焊接温度、恒温时间及压力对焊接接头强度的影响,并用扫描电镜观察了钎焊接头界面的元素分布情况。实验结果表明焊接温度为780℃,恒温时间为14s,焊接压力为2.23 MPa时,强度达251.19 MPa;最后,采用电火花线切割技术加工制造了表面质量较好的PCD微细立铣刀。更多还原

【Abstract】 The brazing of Polycrystalline diamond(PCD) compact and tool blade cutting are two key manufacturing technology in the manufacturing process of PCD micro end tool.Firstly,the stress in brazing parts during the normal use is calculated by finite element method in this paper.Secondly,the orthogonal high frequency induction brazing experiment was conducted in order to study the influence of brazing temperature,holding time,and pressure on shearing strength.The distribution of elements on the brazing intersection was observed by means of Scanning Electron Microscope(SEM).It was found that the highest shear strength value 251.19Mpa could be achieved when the joint is brazed at 750℃for 14s under the pressure of 2.23Mpa.Finally,PCD micro end tool with good surface quality is manufactured by the Wire cut Electrical Discharge Machining(WEDM).更多还原