6010铝合金电阻步进缝焊温度场数值模拟
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摘要
采用Abaqus软件对电阻步进缝焊连续3个焊点的温度场进行了数值模拟,研究了焊点成型过程中熔核区、热影响区、母材区和相邻焊点之间重叠区域的温度场变化特征以及前焊点对后焊点成型过程的影响规律,在此基础上进一步研究了焊接参数对焊点成型形状的影响。结果表明,焊接过程中焊点不同区域的温度场分布和温度变化趋势不一致,重叠区在焊接极短时间内温度梯度变化复杂;因前焊点的预热作用,后焊点的最高温度、熔核长度、重叠量以及熔深受前焊点的影响明显;加大焊接电流或延长通电时间在使熔深加大的同时可以获得成型形状更为平直的焊点,通电时间对熔深的影响大于焊接电流。
The temperature field of three continuous welding spots by resistance step-by-step seam welding was simulated by using Abaqus software. The change characteristics of the temperature field in the nugget zone, the heat affected zone, the base metal zone and the overlap zone between adjacent solder joints in the solder joints forming process, and the influence of front solder joint on the forming of rear solder joint were studied. Based on this, the influence of welding parameters on the forming shape of the solder joint was further studied. The results show that the distribution of temperature field and the change trend of temperature in different regions of the solder joint during welding process are inconsistent, and the overlap zone has a complex temperature gradient change during very short welding time. Due to the pre-heating effect of the front solder joint,the maximum temperature, the length of the nugget, the overlap amount and the depth of fusion of the rear solder joint are obviously affected by the front solder joint. Straight solder joint can be obtained by increasing the welding current or extending the electrifying time and the effect of the electrifying time on the depth of fusion is greater than that of the welding current.
The temperature field of three continuous welding spots by resistance step-by-step seam welding was simulated by using Abaqus software. The change characteristics of the temperature field in the nugget zone, the heat affected zone, the base metal zone and the overlap zone between adjacent solder joints in the solder joints forming process, and the influence of front solder joint on the forming of rear solder joint were studied. Based on this, the influence of welding parameters on the forming shape of the solder joint was further studied. The results show that the distribution of temperature field and the change trend of temperature in different regions of the solder joint during welding process are inconsistent, and the overlap zone has a complex temperature gradient change during very short welding time. Due to the pre-heating effect of the front solder joint,the maximum temperature, the length of the nugget, the overlap amount and the depth of fusion of the rear solder joint are obviously affected by the front solder joint. Straight solder joint can be obtained by increasing the welding current or extending the electrifying time and the effect of the electrifying time on the depth of fusion is greater than that of the welding current.
引文
[1]史耀武.焊接技术手册[M].北京:化学工业出版社,2009.
[2]张洪延.电阻焊:基础与应用[M].第二版.北京:科学出版社,2016.
[3]岑耀东,陈芙蓉.电阻缝焊数值模拟研究进展[J].焊接学报,2016,37(2):123-128.
[4]李永强.“激光束-电阻缝焊”复合焊接方法基础研究[D].吉林:吉林大学,2009.
[5]张梅红,魏冬至.汽车用DP800双相钢电阻点焊温度场数值模拟研究[J].热加工工艺,2016,45(5):243-246.
[6]李永强,赵贺,赵熹华,等.铝合金LB-RSW焊接中RSW温度场的数值模拟[J].焊接学报,2009,30(4):29-32.
[7]Mondolfo L F.Aluminum alloys:structure and properties[M].London:Butterworth's Limited Company,1976.
[8]West E G.铜和铜合金[M].陈北盈,涂远军,孙啸华,译.长沙:中南工业大学出版社,1987.
[2]张洪延.电阻焊:基础与应用[M].第二版.北京:科学出版社,2016.
[3]岑耀东,陈芙蓉.电阻缝焊数值模拟研究进展[J].焊接学报,2016,37(2):123-128.
[4]李永强.“激光束-电阻缝焊”复合焊接方法基础研究[D].吉林:吉林大学,2009.
[5]张梅红,魏冬至.汽车用DP800双相钢电阻点焊温度场数值模拟研究[J].热加工工艺,2016,45(5):243-246.
[6]李永强,赵贺,赵熹华,等.铝合金LB-RSW焊接中RSW温度场的数值模拟[J].焊接学报,2009,30(4):29-32.
[7]Mondolfo L F.Aluminum alloys:structure and properties[M].London:Butterworth's Limited Company,1976.
[8]West E G.铜和铜合金[M].陈北盈,涂远军,孙啸华,译.长沙:中南工业大学出版社,1987.