摘要
为了确定磁场和活性剂联合作用下TIG焊热源模型,分别采用双椭圆面热源模型和双椭球体热源模型对焊接熔池的温度场分布进行了数值模拟,根据模拟结果的等值线分布情况可以获得熔池形状.通过将试验值和模拟值进行对比可以发现,利用双椭球体热源模型得到的熔池形状与实际熔池尺寸相吻合,而双椭圆面热源模型不能很好地反应厚度方向上的温度分布.结果表明,双椭球体热源模型可以更加准确地表征磁场和活性剂联合作用下TIG焊的实际焊接过程,打破了以往依照焊接方法选取热源模型的传统.
In order to determine the heat source model for TIG welding under the combined effect of magnetic field and active agent, the numerical simulation was performed for the temperature field distribution of welding pool with adopting both double oval surface heat source model and double ellipsoid body heat source model. And thus, the shape of welding pool can be obtained according to the contour distribution in the simulated results. Through comparing the experimental and simulated values, it can be found that the shape of welding pool, obtained with the double ellipsoid body heat source model, is coincided with the actual size of welding pool, while the temperature distribution in the thickness direction can not be well reflected with the double oval surface heat source model. The results show that the double ellipsoid body heat source model can more accurately characterize the actual welding process of TIG welding under combined effect of magnetic field and active agent, which breaks the previous tradition of selecting the heat source models in accordance with the welding methods.
出处
《沈阳工业大学学报》
EI
CAS
北大核心
2015年第5期505-509,共5页
Journal of Shenyang University of Technology
基金
辽宁省教育厅基金资助项目(201124125)
辽宁省博士启动基金资助项目(20131079)
关键词
TIG焊
磁场
活性剂
双椭圆面热源
双椭球体热源
数值模拟
温度场
熔池形状
TIG welding
magnetic field
active agent
double oval surface heat source
double ellipsoidbody heat source
numerical simulation
temperature field
shape of welding pool
