辅丝对摇动电弧窄间隙GMA焊接温度场的影响
Effect of additional wire on temperature field of swing-arc narrow gap GMA welding
吴叶军 1胥国祥 2王加友 2陈保国3
作者信息
- 1. 常州工程职业技术学院,江苏 常州,213164;江苏科技大学,江苏省先进焊接技术重点实验室,江苏 镇江,212003
- 2. 江苏科技大学,江苏省先进焊接技术重点实验室,江苏 镇江,212003
- 3. 常州工程职业技术学院,江苏 常州,213164
- 折叠
摘要
[目的]旨在建立主辅丝同步的摇动电弧窄间隙GMA焊温度场模型.[方法]从宏观传热学出发,综合考虑横断面几何形状特征、主丝和辅丝的运动及焊缝表面形状对电弧热流分布特征的影响,并利用ANSYS软件对不加辅丝和主辅丝同步摇动两种情况下的电弧瞬态温度场及热循环曲线进行了模拟计算.[结果]焊缝横断面的计算结果、测温特征点热循环曲线的计算结果,与试验结果接近.[结论]证明模型可以真实反映添加辅丝的摇动电弧的移动轨迹及分布特征,具有较高的准确性.不加辅丝时,焊缝横断面底部有明显"双峰"特征,主辅丝同步摇动时,"双峰"特征明显减弱.主辅丝同步摇动情况下的热影响区宽度略有增加.
Abstract
[Objective]The purpose is to develop the heat source model for swing-arc narrow gap GMA welding.[Methods]This paper considers the influence of arc swing,geometric feature of welded joint,movement of additional wire and weld surface shape on arc heat flux distribution,based on macro thermal transfer theory and geometric feature of weld cross section.By using ANSYS software,the transient temperature profile and thermal cycle curve in swing-arc narrow gap GMA welding are calculated and their distribution features are analyzed.[Results]The results show that the established heat source model can reflect the moving path of swing-arc and its thermal action feature,the calculated geometry and size of weld cross section and thermal cycles of temperature measurement characteristic point agree well with the experimental data.[Conclusion]It is proved that the model can truly reflect moving track and distribution characteristics of swing-arc with additional wires,and has high accuracy.There is an obvious"double peak"feature at the bottom of the cross section of the weld without additional wire,while the"double peak"feature is diminished with additional wire.The width of HAZ slightly increases when the main and additional wires are synchronously swing.
关键词
摇动电弧窄间隙/辅丝/热源模型/数值模拟Key words
swing-arc narrow gap welding/additional wire/heat source model/numerical simulation引用本文复制引用
基金项目
国家自然科学基金资助项目(51875268)
江苏省"青蓝工程"资助项目()
出版年
2024
NETL
NSTL
万方数据