电磁力动态变化对短路过渡稳定性的影响  

Influence of dynamic electromagnetic force on stability of short-circuiting transfer in GMAW

作　　者：何建萍[1] 吴毅雄[2] 焦馥杰[1] 

机构地区：[1]上海工程技术大学材料工程学院,上海201620 [2]上海交通大学激光制造研究中心,上海200240

出　　处：《焊接学报》2009年第6期5-8,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50775135)

摘　　要：从理论上研究短路过渡过程中燃弧期液态熔滴上的表面张力、电磁力和重力之间的动态平衡问题,重点讨论了燃弧期熔滴上电磁力的动态变化及其对短路过渡稳定性的影响.结果表明,作用在短路过渡燃弧期熔滴上的电磁力的动态变化与熔滴大小、弧根位置及焊接电流的动态变化有关;燃弧期熔滴上的动态力平衡不能维持时,将造成熔滴脱离,发生自然过渡.Problems about dynamic force equilibrium on liquid droplet during arc period of short-circuiting transfer are theoretically approached.Dynamic electro-magnetic force and its influence on the stability of short-circuiting transfer during arc period of short-circuiting transfer are mainly discussed.The results show that the dynamic change of electro-magnetic force on droplet relates to the variations of droplet size,arc root position and welding current.If dynamic force equilibrium on droplet during arc period of short-circuiting transfer can not be maintained,free-flying transfer of droplet will occur.

关 键 词：熔化极气保焊 短路过渡 电磁力 动态力平衡 稳定性 

分 类 号：TG403[金属学及工艺—焊接]