6061铝合金超声波点焊温度场数值模拟及试验

发布时间：2018-01-27 15:52

本文关键词： 超声波金属焊接有限元分析塑性变形铝合金温度测试　出处：《焊接学报》2017年04期 　论文类型：期刊论文

【摘要】：针对超声波焊接过程中温度演化过程监测存在的困难,考虑焊接过程中塑性变形产热和高频摩擦产热,建立了三维超声波焊接热-结构耦合Ansys有限元模型,模拟了6061铝合金超声波金属焊接过程,计算了不同焊接参数下的温度场,用细丝热电偶测温试验验证了焊接温度.结果表明,焊接过程中焊接区域最高温度模拟值与试验值误差在5%以内,表明了模型的准确性;温度最高处位于焊接区域中心位置,高温区随焊接时间的增大而增大;超声波金属焊接过程中,温度场主要受焊接压力及焊接时间的影响.
[Abstract]:In view of the difficulties in monitoring the temperature evolution process during ultrasonic welding, the heat generation of plastic deformation and high frequency friction during the welding process are considered. A three-dimensional thermo-structural coupled Ansys finite element model for ultrasonic welding was established. The welding process of 6061 aluminum alloy was simulated and the temperature field under different welding parameters was calculated. The welding temperature was verified by filament thermocouple test. The result shows that the error between the maximum temperature simulation value of welding area and the test value is less than 5%, which indicates the accuracy of the model. The highest temperature is located in the center of the welding area, and the high temperature area increases with the increase of welding time. In the process of ultrasonic metal welding, the temperature field is mainly affected by welding pressure and welding time.
【作者单位】：南昌大学机电工程学院江西省机器人及焊接自动化重点试验室;江西五十铃发动机有限公司;
【基金】：教育部留学回国人员科研启动基金江西省自然科学基金资助项目(20132BAB206024)
【分类号】：TG453.9
【正文快照】： 0序言超声波金属焊接有着独特的焊接特点,可焊接不同材质和厚度的金属箔、片和板材,焊接牢固可靠、节能、无污染,被广泛应用在工业各个领域[1].国内外学者对其也做了许多分析,然而关于超声波焊接接头的形成机理尚未形成一致的看法.焊接过程中温度变化情况对探讨超声波焊接机理

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