电弧堆焊参数对焊道形貌的影响规律  

The influence of arc surfacing parameters on weld bead morphology

作　　者：吴超群[1,2,3] 顾世阳 雷艇 余慧雯 Wu Chaoqun;Gu Shiyang;Lei Ting;Yu Huiwen(Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Digital Manufacturing Equipment and Technology,Wuhan 430074,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Techology,Wuhan 430070,China)

机构地区：[1]武汉理工大学,武汉430070 [2]数字制造装备与技术国家重点实验室,武汉430074 [3]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《焊接》2023年第2期17-23,共7页Welding & Joining

摘　　要：文中以单道焊缝形貌为切入点,研究工艺参数对焊道形貌的影响并建立回归方程以预测焊道尺寸。结果表明,焊接电流对焊道尺寸的影响最显著,焊接电流每提高50 A,焊缝宽度平均增大14%,不同工艺参数间存在一定耦合关系,同时揭示了焊接电流和焊接速度的增加引起电弧动压力变化进而导致焊缝由指状向碗状形貌转变的规律。对比多种回归模型,综合考虑工艺参数耦合的影响,提出基于剔除低相关因子的响应曲面法,整体回归效果好,试验表明该模型的R2均在0.97以上,预测误差在5%以内。建立的回归模型将为电弧堆焊层数与道数的规划提供准确的焊道尺寸信息,确保机器人焊接位姿满足工艺要求。This paper takes the shape of single weld as the starting point to study the influence of welding process parameters on the weld bead morphology and establish a regression equation to predict the weld bead size.The research shows that the welding current has the most significant effect on the weld bead size.When the welding current increases by 50 A,the weld width increases by 14%on average.There is a certain coupling relationship between different process parameters.At the same time,it reveals the law that the increase of welding current and welding speed causes the change of arc dynamic pressure,which leads to the transformation of weld shape from finger to bowl.The reason for the change from finger-like morphology to bowl-like morphology.Compared with various regression models,the response surface method based on the elimination of low correlation factors proposed by considering the coupling effect of process parameters has a good overall regression effect,with R2 above 0.97 and the average error within 0.5%.The regression model established in this paper will provide accurate weld bead size information for the planning of arc surfacing layers and passes,and ensure that the robot welding pose meets the process requirements.

关 键 词：电弧堆焊 工艺参数 焊道尺寸 回归分析 

分 类 号：TG444.2[金属学及工艺—焊接]