六向钢节点摆动电弧增材制造及其承载性能  

Swinging Wire Arc Additive Manufacturing of Six-Directions Steel Joints in Building Steel Structure and Evaluation of its Load-Bearing Performance

作　　者：齐膑 余圣甫[1] 刘曙 何天英 QI Bin;YU Sheng-fu;LIU Shu;HE Tian-ying(School of Material Science and Engineering,Huzhong University of Science and Technology,Hubei Wuhan 430070,China;Wuhan Branch,China Construction Steel Structure Co.,Ltd.,Hubei Wuhan 430070,China)

机构地区：[1]华中科技大学材料科学与工程学院,湖北武汉430070 [2]中建钢构武汉分公司,湖北武汉430070

出　　处：《机械设计与制造》2024年第4期138-144,共7页Machinery Design & Manufacture

基　　金：国家重点研发计划项目(2017YFB1103200)。

摘　　要：根据六向钢节点结构特点,采用分区成形、平面切片以及摆动与偏置填充的策略制造。为了避免钢节点已成形部分与弧焊枪的相互干涉,将六向钢节点分为直壁圆筒区、两管相贯区和三管相贯区。直壁圆筒区采用摆动填充,两管相贯与三管相贯区分别采用轮廓偏置填充与混合路径填充。合理的成形策略与摆动电弧增材制造工艺,使成形的六向钢节点有良好力学性能与高的成形精度,摆动电弧增材制造六向钢节点整体尺寸偏差为(±1.30)mm。有限元分析和台架测试电弧增材制造六向钢节点在实际工况条件下相贯区的最大应力为36.7MPa,远小于堆积金属屈服强度,始终处于弹性状态,具有高的承载性能。According to the characteristics of the six-directions steel joint structure,the strategy of zone forming,plane slicing,swing and offset filling was adopted.In order to avoid the mutual interference between the formed part of the six-directions steel node and the arc welding torch,the six-directions steel node was divided into the straight wall cylinder area,the two-pipe inter-secting area and the three-pipe intersecting area.The straight wall cylinder area was filled with swing,and the two-pipe inter-secting and the three-pipe intersecting areas were respectively filled with contour offset and mixed paths.Reasonable forming strat-egy and swing wire arc additive manufacturing process maked the formed six-directions steel node had good mechanical proper-ties and high forming accuracy.The overall size deviation of the swing arc wire additive manufacturing six-directions steel node was±1.30mm.Finite element analysis and bench test wire arc additive manufacturing six-directions steel node under actual working conditions,the maximum stress in the intersecting zone was 36.7MPa,which was much smaller than the yield strength of the deposited metal,and it was always in an elastic state,it had good load-bearing performance.

关 键 词：六向钢节点 摆动电弧增材制造 成形策略 承载性能 

分 类 号：TH16[机械工程—机械制造及自动化] TG422.3[金属学及工艺—焊接]