电弧增材制造焊丝熔化及熔滴过渡过程建模与仿真研究
Modeling and Simulation of Weld Wire Melting and Droplet Transition Process in Wire Arc Additive Manufacturing
陈世雄 1姚继开 1范立想 1唐伟东 2康小明3
作者信息
- 1. 长沙理工大学汽车与机械工程学院,湖南长沙,410114
- 2. 长沙理工大学汽车与机械工程学院,湖南长沙,410114;省部共建精密电子制造技术与装备国家重点实验室,广东广州,510006
- 3. 上海交通大学机械与动力工程学院,上海,200241
- 折叠
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%.
Abstract
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.
关键词
电弧增材制造/焊丝熔化/熔滴过渡/仿真分析Key words
wire arc additive manufacturing/welding wire melting/melt droplet transition/simulation analysis引用本文复制引用
基金项目
国家自然科学基金(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基金(JMDZ202311)
出版年
2024
NETL
NSTL
万方数据