铂电极引线与异质多股导线的精密连接技术研究  

Research on Precision Joining Technology for Platinum Electrode Leads and Heterogeneous Multi Strand Wires

作　　者：涂佳汐 吴鸿燕[2] 刘冠鹏 齐万利[3] 张体明 陈玉华[1] TU Jiaxi;WU Hongyan;LIU Guanpeng;QI Wanli;ZHANG Timing;CHEN Yuhua(Jiangxi Key Laboratory of Forming and Joining Technology for Aviation Components,Nanchang Hangkong University,Nanchang 330063,China;School of Marine Engineering,Jiujiang Vocational and Technical College,Jiujiang 332007,China;Harbin Welding Institute Limited Company,Harbin 150028,China)

机构地区：[1]南昌航空大学江西省航空构件成形与连接重点实验室,江西南昌330063 [2]九江职业技术学院船舶工程学院,江西九江332007 [3]中国机械总院集团哈尔滨焊接研究所有限公司,黑龙江哈尔滨150028

出　　处：《电焊机》2023年第8期86-92,共7页Electric Welding Machine

摘　　要：针对航空传感元器件引脚线和不等直径异种材质多股高温导线的连接中存在的焊点直径不可控、镍基引脚线软化导致的焊点强度低、多股导线不能完全连接、工艺不稳定等技术难题,提出采用激光微焊接技术对铂电阻引线(0.2 mm镍丝或0.2 mm银丝)与导线(0.5 mm镍丝或铜镀银多股高温导线)之间的连接问题开展研究,进行一系列工艺实验。结果表明,采用激光微焊接技术能够实现0.2 mm镍丝与0.5 mm镍丝的良好焊接,接头无气孔、裂纹等缺陷,当激光功率百分比为14%、频率为4 Hz、脉冲宽度为3 ms时,焊接接头的拉剪力最高,可达22.75 N(0.2 mm镍丝母材的85.5%);激光焊接输入能量在2.9 J以下时无法形成可靠焊点,当输入能量增加到3.2 J以上时,焊点尺寸明显过大,细丝大量熔化、甚至焊塌,而且软化严重;激光能量波动、焊接装配等都能明显导致软化的波动,造成接头拉剪力的稳定性较差;预涂钎料将多股线钎焊成一股再进行激光微焊接不适合该种零件的焊接,焊接接头质量不易控制,直径超过要求;采用压方机先对多股高温导线压方,再与0.2 mm镍(银)丝进行激光微焊接,焊接接头的拉剪力较低,拉伸接头断裂于焊缝处。通过上述基础研究,探索了激光微焊接方法用于该类产品连接的可行性,获得焊接工艺可行性、焊接接头的性能数据,有望为改进现有工艺方法、提高焊接接头承载能力提供指导和参考。In response to technical challenges such as uncontrollable joint diameter,softening of nickel based pin wires resulting in low solder joint strength,incomplete connection of multi stranded wires,and unstable process in the connection of aviation sensing component wires and multi stranded high-temperature wires of different materials with different diameters,This article proposes to use laser micro-welding technology to study the connection problem between platinum resistance leads(0.2 mm nickel wire or 0.2 mm silver wire)and wires(0.5 mm nickel wire or copper silver plated multi-strand high-temperature wires),and conduct a series of process experiments.The results show that laser micro-welding technology can achieve good welding between 0.2 mm nickel wire and 0.5 mm nickel wire,with no defects such as pores and cracks in the joint.When the laser power percentage is 14%,the frequency is 4 Hz,and the pulse width is 4 ms,the tensile shear force of the welded joint is the highest,reaching 22.75 N(85.5%of the 0.2 mm nickel wire base material);When the input energy of laser welding is below 2.9 J,reliable joints cannot be formed.When the input energy increases to 3.2 J or above,the joint size is significantly too large,with a large number of fine wires melting or even welding collapse,and severe softening;La‐ser energy fluctuations,welding assembly,and other factors can significantly lead to softening fluctuations,resulting in poor stability of joint tensile and shear forces;Pre coating solder to braze multiple wires into one strand and then perform laser micro-welding is not suitable for the welding of this type of part,as the quality of the welded joint is difficult to control and the diameter exceeds the requirements;Using a square pressing machine,multiple high-temperature wires are first pressed,and then laser micro welded with 0.2 mm nickel(silver)wire.The tensile shear force of the welded joint is low,and the ten‐sile joint fractures at the weld seam.Through the above basic research,the feasibility of laser

关 键 词：航空传感元器件 激光微焊接 异种金属 微细丝 

分 类 号：TG457.1[金属学及工艺—焊接]