微束等离子弧焊气体流量配比的数值模拟  

Numerical simulation of ratio of gas flow in micro-plasma arc welding

作　　者：张兵 何建萍[1] 张济楠 ZHANG Bing;HE Jianping;ZHANG Jinan(School of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学材料工程学院,上海201620

出　　处：《智能计算机与应用》2020年第2期293-296,共4页Intelligent Computer and Applications

基　　金：国家自然科学基金(51775327);上海市科委基础研究重点项目(14JC1402700)。

摘　　要：等离子弧焊电弧稳态性好,电弧能量高,穿透力强,能实现单面焊双面成形,特别适合超薄板的焊接。在焊接过程中,电弧的形态和稳定性以及对工件的热输入对焊缝成形和焊接质量的影响都是显著的,单从工艺试验和电弧宏观上的表现无法准确反映电弧与焊接质量的关系。得益于计算机技术的快速发展和有限元分析软件在焊接领域的应用,利用ANSYS有限元分析软件,建立了电弧的三维有限元模型,比较不同离子气与保护气流量的配比的电弧温度场、流场、电磁力和电弧压力的分布特征,通过数据分析,选择合适的气体流量配比,为工艺试验提供可靠的数据参考。The steady state of plasma arc welding is good,meanwhile the plasma arc welding has high arc energy and strong penetration,which can realize single-side welding and double-side forming,especially suitable for the welding of ultra-thin plate.In the process of welding,the shape and stability of arc as well as the heat input to the work-piece have significant effects on weld formation and welding quality.But the macro performance of the process test and the arc alone cannot accurately reflect the relationship between the arc and the welding quality.Because of the rapid development of computer technology and the application of finite element analysis software in the field of welding,using ANSYS finite element analysis software,the paper sets up the threedimensional finite element model of arc,compares arc temperature field,flow field,electromagnetic force and the arc pressure distribution characteristics between different ion gas and protection gas flow ratio.Through the data analysis,the paper selects the appropriate ratio of gas flow and provides reliable reference data for process test.

关 键 词：微束等离子弧焊 气体 流量配比 数值模拟 

分 类 号：TG403[金属学及工艺—焊接]