摘要
燃料电池金属双极板的密封工艺为激光焊接。焊接对象为厚度不大于0.1 mm的金属压花薄板,焊接过程需要精确控制熔深使其处于半熔透状态。对该小尺度精密焊接过程进行数值模拟定量研究,需要一个能准确模拟焊接物性的热源模型。在现有的激光焊接热源模型基础上,从熔深控制的角度修改模型,得到适用于半熔透激光焊接的热源模型。采用单因素分析方法,取得热源模型中各变量对热通量输出的影响趋势。通过焊接试验,取得小变形双极板成品的焊接参数以及焊缝截面形状。应用试错法整定热源模型中各变量的数值。使用参数整定完毕的热源模型进行焊接过程仿真,仿真结果和真实半熔透情况吻合。该热源模型可作为双极板焊接领域进一步数值定量研究的参考模型。
The laser welding process is employed for sealing the metal bipolar plate of fuel cells.The targets for this method are stamped thin plates,no more than 0.1 mm in thickness.In the welding process,it is necessary to accurately control the depth of fusion to make it in a semi-penetration state.A heat source model that can accurately simulate the physical properties of welding is needed to quantitatively study the small-scale precision welding process by numerical simulation.In this paper,a modification was made to the existing laser welding heat source model to create a heat source model suitable for semi-penetration laser welding,with a focus on penetration control.By applying single factor analysis,the effect trend of each variable within the heat source model on heat flux output was determined.Through the welding experiment,the welding parameters and the weld cross-section shape of the small deformation bipolar plate are obtained.The trial-and-error method is used to adjust the value of each variable in the heat source model.The welding process is simulated by using the heat source model with the well-modulated parameters,and the simulation results are consistent with the real semi-penetration state.Consequently,this heat source model holds potential as a reference model for future numerical quantitative investigations in bipolar plate welding.
作者
张嘉波
唐普洪
杨文斌
许来涛
Zhang Jiabo;Tang Puhong;Yang Wenbin;Xu Laitao(Institute of Intelligent Manufacturing,Jiaxing Vocational Technical College,Jiaxing 314036,Zhejiang,China)
出处
《应用激光》
CSCD
北大核心
2024年第1期18-26,共9页
Applied Laser
基金
2021年嘉兴市公益性研究计划(财政资助)(2021AY10081)
2021浙江省教育厅科研项目(Y202146279)
2021浙江省高校国内访问工程师校企合作项目(FG2021285)
2021嘉兴职业技术学院校立科研项目(jzyz202101)。
关键词
金属双极板
激光焊接
半熔透
热源模型
metal bipolar plate
laserwelding
semi-penetration
heat source model
