摘要
以GH4169高温合金箍带为对象,首先建立箍带单点电阻点焊仿真模型,分析了焊接电流、通电时间、电极压力等焊接参数对熔核尺寸以及温度场的作用规律。然后建立了箍带多点电阻点焊模型,分析焊点数量及焊点距离对焊后变形的影响规律。结果表明:熔核尺寸及焊透率变化规律相同,均随着焊接电流和通电时间的增大而增大,随着电极压力的增大而减小。获得了满足熔核标准的点焊参数:焊接电流为3.5 kA,电极压力为8.5 kN,通电时间为0.20 s。多点焊接中,箍带焊点数量为3且焊点距离为11 mm,工件焊接变形最小。
Taking a GH4169 superalloy strap as the object,the numerical model of single point resistance spot welding was established firstly,and the effects of welding current,electrifying time and electrode pressure on the nugget size and temperature field were studied.Then,the multi-point resistance spot welding model was established to analyze the influence of the number and distribution of solder joints on the deformation of the workpiece after welding.The results show that the nugget size and penetration rate both increase with the increase of welding current and electrifying time,while they decrease with the increase of electrode pressure.The optimized parameters of single point resistance spot welding are described as follows:the welding current of 3.5 kA,the electrode pressure of 8.5kN,and the electrifying time of 0.20 s.In the multi-point welding,the welding deformation of the workpiece is minimal when the number of welding joints is 3 and the distance between the welding spots is 11 mm.
作者
袁荣
方军
张涛
于家祥
YUAN Rong;FANG Jun;ZHANG Tao;YU Jiaxiang(Anhui Tianhang Mechanical&Electrical Co.,Ltd.,Wuhu 241000,China;College of Mechanical and Electronic Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《热加工工艺》
北大核心
2023年第17期131-135,146,共6页
Hot Working Technology
基金
江苏省自然科学基金项目(BK20170785)。
关键词
电阻点焊
熔核
温度场
多点焊接
焊接变形
resistance spot welding
nugget
temperature field
multi-point welding
welding deformation
