电极直径对连续点焊熔核的影响  

Effect of electrode diameter on nugget in continuous spot welding

作　　者：付玉鹏 李取浩 臧云飞 FU Yupeng;LI Quhao;ZANG Yunfei(Haixiang Machinery Factory,Handan 057150,Hebei,China;School of Mechanical Engineering,Shandong University,Jinan 250013,Shandong,China;Naval Aviation University Qingdao Campus,Qingdao 266041,Shandong,China)

机构地区：[1]海翔机械厂,河北邯郸057150 [2]山东大学机械工程学院,山东济南250013 [3]海军航空大学青岛校区,山东青岛266041

出　　处：《金属加工(热加工)》2025年第4期79-86,共8页MW Metal Forming

摘　　要：在电阻焊过程中,电极材料的选择直接影响着焊接质量。常用的Cr-Zr-Cu合金因其出色的电导率和力学性能而被广泛应用于电极制造。然而,在连续点焊操作中,电极头部的磨损会导致其直径增大,这一变化会直接影响到焊点熔核直径,进而影响焊点质量。为深入研究这一现象,利用ABAQUS软件构建了1.5mm厚的1Cr18Ni9Ti钢电阻点焊的仿真模型。通过模拟电极直径在6mm、7mm及8mm焊接条件下的温度场变化,探讨了电极直径变化如何影响焊接过程中熔核直径的温度分布。仿真结果表明:在固定焊接压力和焊接时间的条件下,随着电极直径的增大,焊点区域的温度降低,导致熔核直径逐渐缩小。特别是当电极直径达到8mm时,焊点区域的温度未能达到金属的熔化点,从而导致熔核消失,电极失效。The choice of electrode material directly influences the quality of resistance welding.The commonly used Cr-Zr-Cu alloy is widely employed in electrode manufacturing due to its excellent electrical conductivity and mechanical properties.However,in continuous spot welding operations,the wear of the electrode tip leads to an increase in its diameter,which directly affects the nugget diameter and subsequently the quality of the weld.To investigate this phenomenon in detail,employs ABAQUS software to construct a simulation model for resistance spot welding of 1.5mm thick 1Cr18Ni9Ti material.The study examines how variations in electrode diameter(6mm,7mm,and 8mm) impact the temperature distribution during welding by simulating the changes in the temperature field.The simulation results indicate that under fixed welding pressure and welding time conditions,as the electrode diameter increases,the temperature in the weld zone decreases,resulting in a gradual reduction in nugget diameter.Notably,when the electrode diameter reaches 8mm,the temperature in the weld zone does not reach the melting point of the metal,causing the nugget to disappear and the electrode to fail.

关 键 词：电阻焊 电极直径 熔核直径 ABAQUS模拟 

分 类 号：TG444[金属学及工艺—焊接]