采用石墨和铜钨电极实现电触头电阻钎焊的仿真研究与能耗比较
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摘要
提出了导电、传热耦合作用的有限元模型,数值分析了石墨电极和铜钨电极对电触头电阻钎焊能耗、焊接时间的不同影响。结果表明,采用铜钨电极的焊接时间不超过石墨的1/3,且电阻钎焊的焊接时间均随焊接电流的增加而减小;采用铜钨电极焊接的能耗比石墨小一个数量级,且能耗均随焊接电流的变大而减小,所花电费降为石墨的43.8%,所焊电触头数是石墨的2.3倍。相对于石墨而言,选用铜钨电极可大幅节省电触头电阻钎焊的生产成本,并提高生产效率。仿真结果和试验吻合良好,证明了有限元方法仿真分析电阻钎焊过程的可行性。
This paper proposed a finite element model on conductive and heat transfer coupling,and analyzed mumerically the influence of graphite and copper tungsten electrode on contact resistance brazing's consumption and welding time. The results show that the welding time by using copper tungsten electrode is 1 /3 as long as that by graphite,and all the welding time is reduced when the welding current increases. The consumption by using copper tungsten is less than that by graphite by one order of magnitude,and all the consumption is reduced when the welding current increases. The electricity cost is 43. 8% of that by graphite,and the welded contacts are 2. 3 times as more as that by graphite. Relative to graphite,using copper tungsten electrode cam greatly save the production cost of contact resistance brazing and inhance the efficiency. The simulation results agree well with the test results,which proves the feasibility of the method.
This paper proposed a finite element model on conductive and heat transfer coupling,and analyzed mumerically the influence of graphite and copper tungsten electrode on contact resistance brazing's consumption and welding time. The results show that the welding time by using copper tungsten electrode is 1 /3 as long as that by graphite,and all the welding time is reduced when the welding current increases. The consumption by using copper tungsten is less than that by graphite by one order of magnitude,and all the consumption is reduced when the welding current increases. The electricity cost is 43. 8% of that by graphite,and the welded contacts are 2. 3 times as more as that by graphite. Relative to graphite,using copper tungsten electrode cam greatly save the production cost of contact resistance brazing and inhance the efficiency. The simulation results agree well with the test results,which proves the feasibility of the method.
引文
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[2]GREENWOOD J A.Temperature in spot welding[J].British Welding Journal,1961(6):316-322.
[3]韩方东.钛种板与铜耳的电阻钎焊技术[D].兰州:兰州理工大学,2009.
[4]王春生,赵熹华.异质材料点焊过程电热耦合数值分析[J].吉林工业大学自然科学学报,1999,29(96):29-34.
[5]邢晓强,潘希德,高玉保,等.低压电器电触头高频感应钎焊工艺优化方法[J].低压电器,2011,5:14-17.
[6]贾志华,郑晶,王轶,等.Ag W50触头与紫铜的电阻钎焊工艺研究[J].热加工工艺,2008,37(23):98-99.
[7]王希靖,韩方东,张昌青.钛种板与铜耳的电阻钎焊技术[C]∥第十六届全国钎焊及特种连接技术交流会论文集,2008:382-385.
[8]王荣,甘可可,陈乐生,等.钎料对电阻钎焊银触点强度及电阻的影响[J].焊接技术,2010,39(5):49-51.
[9]张鹏.基于金属电极的电工触头电阻钎焊工艺的研究[D].哈尔滨:哈尔滨工业大学,2011.
[10]宋珂,母仕华,张秀芳,等.银石墨触点焊接方法研究[J].电工材料,2010(2):22-25.
[11]彭寿燕.铜与石墨钎焊工艺与机理研究[D].哈尔滨:哈尔滨工业大学,2009.
[12]陈乐生,王荣,陈晓.电阻钎焊Ag Cd O触点的剪切性能研究[J].电工材料,2010(1):9-12.
[13]王荣,陈乐生,甘可可,等.电阻钎焊Ag Cd O银触点的钎着率、强度及接触电阻的关系研究[J].低压电器,2010(4):6-8.