摘要
基于动网格和多物理场耦合技术,建立了焊丝熔化和熔滴过渡的热流耦合数学模型。研究了焊丝熔化形成熔滴、熔滴与基板的接触和铺展、熔融金属桥形成和拉断过程。分析了熔滴在送丝过程中的温度变化、熔滴和熔池的速度变化、熔滴传质过程中的体积变化。结果表明,熔滴尺寸、形状与实验结果可较好吻合,最终转移至基板表面熔融铝的体积约占熔滴总体积的80%。
Based on the dynamic mesh and multi-physics field coupling techniques,a numerical model of heat-fluid coupling for welding wire melting and melt droplet transition was established.The melting processes of the wire to form a droplet,contact and spreading of the droplet with the substrate,as well as the formation of a molten metal bridge and the pull-off process were investigated.The temperature variation of the molten droplet during wire feeding,the velocity variation of the droplets and the melt pool,and the volume change of the molten droplets during mass transfer were analyzed.The size and shape of the molten droplet were in good agreement with the experimental results.The volume of molten aluminum finally transferred to the substrate surface was about 80%of the total volume of the molten droplet.
作者
陈世雄
姚继开
范立想
唐伟东
康小明
CHEN Shixiong;YAO Jikai;FAN Lixiang;TANG Weidong;KANG Xiaoming(College of Automobile and Mechanical Engineering,Changsha Univensily of Science and Technology,Changsha 410114,China;State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment,Guangzhou 510006,China;School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200241,China)
出处
《电加工与模具》
北大核心
2024年第3期48-53,共6页
Electromachining & Mould
基金
国家自然科学基金项目(52005056)
省部共建精密电子制造技术与装备国家重点实验室开放课题项目(JMDZ202311)。
关键词
电弧增材制造
焊丝熔化
熔滴过渡
仿真分析
wire arc additive manufacturing
welding wire melting
melt droplet transition
simu lation analysis
