摇动电弧窄间隙GMAW焊温度场数值分析模型
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摘要
从宏观传热学出发,依据横断面几何形状特征,综合考虑电弧摇动、接头几何特征及焊缝表面形状对电弧热流分布特征的影响,建立了摇动电弧窄间隙GMAW焊瞬态温度场数值分析模型.利用ANSYS软件对摇动电弧瞬态温度场及热循环曲线进行了模拟计算,分析了其分布特征.结果表明,模型能够合理、准确反映摇动电弧的移动轨迹及分布特性,且焊缝横断面的计算结果与试验结果吻合较好,从而证明了模型的准确性.在焊接电流为300A,摇动频率为2 Hz时,熔池形态变化有限.
Based on macro thermal transfer theory and geometric feature of weld cross section,the heat source model for swing-arc narrow gap GMAW is developed after considering the influence of arc swing,geometric feature of welded joint and weld surface shape on arc heat flux distribution. By using ANSYS software,the transient temperature profile and thermal cycle curve in swing arc narrow gap GMAW are calculated and their distribution features are analyzed. The results show that the established heat source model can reflect the moving path of swing arc and its thermal action feature and the calculated geometry and size of weld cross section agree well with the experimental data,validating the accuracy of the developed model. At 300 A welding current and 2 Hz swing frequency,the weld pool changes limitedly.
Based on macro thermal transfer theory and geometric feature of weld cross section,the heat source model for swing-arc narrow gap GMAW is developed after considering the influence of arc swing,geometric feature of welded joint and weld surface shape on arc heat flux distribution. By using ANSYS software,the transient temperature profile and thermal cycle curve in swing arc narrow gap GMAW are calculated and their distribution features are analyzed. The results show that the established heat source model can reflect the moving path of swing arc and its thermal action feature and the calculated geometry and size of weld cross section agree well with the experimental data,validating the accuracy of the developed model. At 300 A welding current and 2 Hz swing frequency,the weld pool changes limitedly.
引文
[1]王加友,杨峰,韩伟.摇动电弧窄间隙熔化极气体保护焊接方法及焊炬:中国,200810236274.5[P],2008-11-19.
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[3]朱杰.摇动电弧窄间隙焊接系统的单机控制研究[D].镇江:江苏科技大学,2009.
[4]Wang J Y,Zhu J,Zhang C,et al.Development of swing arc narrow gap vertical welding process[J].ISIJ International,2015,55(5):1076-1082.
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[6]姬书得,方洪渊,刘雪松,等.基于串状热源的手工摆动焊接压力场的数值模拟[J].焊接学报,2005,26(5):46-48.Ji Shude,Fang Hongyuan,Liu Xuesong,et al.Numerical simulation of stress field of manual swing welding on basis of cluster heat source[J].Transactions of the China Welding Institution,2005,26(5):46-48.
[7]张华军,张广军,蔡春波,等.摆动焊接动态过程温度场数值模拟[J].焊接学报,2008,29(2):65-68.Zhang Huajun,Zhang Guangjun,Cai Chunbo,et al.Numerical simulation of temperature field of dynamic welding process with weaving[J].Transactions of the China Welding Institution,2008,29(2):65-68.
[8]兰虎,张华军,陈阿静,等.窄间隙GMAW立焊动态过程模拟及热物理特性[J].焊接学报,2015,36(7):77-82.Lan Hu,Zhang Huajun,Chen Ajing,et al.Numerical simulation of dynamic process and thermal physical properties of narrow gap MAG vertical welding[J].Transactions of the China Welding Institution,2015,36(7):77-82.
[9]方臣富,陈志伟,胥国祥,等.缆式焊丝CO2气体保护焊工艺研究[J].金属学报,2012,48(11):1299-1305.Fang Chenfu,Chen Zhiwei,Xu Guoxiang,et al.Study on the process of CTWW CO2gas shielded welding[J].Acta Metallurgica Sinca,2012,48(11):1299-1305.
[2]任志鹏.电弧摆动式NG-GMAW焊枪及其工艺性能[D].上海:上海交通大学,2013.
[3]朱杰.摇动电弧窄间隙焊接系统的单机控制研究[D].镇江:江苏科技大学,2009.
[4]Wang J Y,Zhu J,Zhang C,et al.Development of swing arc narrow gap vertical welding process[J].ISIJ International,2015,55(5):1076-1082.
[5]Wang J Y,Zhu J,Fu P,et al.A swing arc system for narrow gap GMA welding[J].ISIJ International,2012,52(1):110-114.
[6]姬书得,方洪渊,刘雪松,等.基于串状热源的手工摆动焊接压力场的数值模拟[J].焊接学报,2005,26(5):46-48.Ji Shude,Fang Hongyuan,Liu Xuesong,et al.Numerical simulation of stress field of manual swing welding on basis of cluster heat source[J].Transactions of the China Welding Institution,2005,26(5):46-48.
[7]张华军,张广军,蔡春波,等.摆动焊接动态过程温度场数值模拟[J].焊接学报,2008,29(2):65-68.Zhang Huajun,Zhang Guangjun,Cai Chunbo,et al.Numerical simulation of temperature field of dynamic welding process with weaving[J].Transactions of the China Welding Institution,2008,29(2):65-68.
[8]兰虎,张华军,陈阿静,等.窄间隙GMAW立焊动态过程模拟及热物理特性[J].焊接学报,2015,36(7):77-82.Lan Hu,Zhang Huajun,Chen Ajing,et al.Numerical simulation of dynamic process and thermal physical properties of narrow gap MAG vertical welding[J].Transactions of the China Welding Institution,2015,36(7):77-82.
[9]方臣富,陈志伟,胥国祥,等.缆式焊丝CO2气体保护焊工艺研究[J].金属学报,2012,48(11):1299-1305.Fang Chenfu,Chen Zhiwei,Xu Guoxiang,et al.Study on the process of CTWW CO2gas shielded welding[J].Acta Metallurgica Sinca,2012,48(11):1299-1305.