TIG电弧增材制造AZ31镁合金成形尺寸控制研究  

Research on forming dimension control of TIG wirearc additive manufacturing AZ31 magnesium alloy

作　　者：李子淇 常子金 姜自昊 曹千卉 曾才有 从保强[1] LI Ziqi;CHANG Zijin;JIANG Zihao;CAO Qianhui;ZENG Caiyou;CONG Baoqiang(School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China)

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100191

出　　处：《金属加工（热加工）》2024年第7期6-12,共7页MW Metal Forming

摘　　要：镁合金作为航天装备结构件轻量化和一体化制造的关键轻质结构金属材料,电弧增材制造镁合金过程中成形尺寸精确控制一直是研究的重点。基于二次回归通用旋转组合试验设计法,建立了电弧增材关键工艺参数(基值电流、送丝速度、运动速度)与成形尺寸特征参数间的回归模型,采用响应面法深入分析了单一参数及耦合作用对增材成形尺寸的影响规律。结果表明:在试验设计参数范围内,基值电流的增大对成形高度起抑制作用,对成形宽度起促进作用;随着送丝速度的增大,成形宽度略微减小,层高呈现增大趋势;运动速度的增大使得沉积层的层高和层宽均减小。各工艺参数对成形高度影响最大的是送丝速度,其次是基值电流,影响最小的是运动速度;基值电流对成形宽度影响最大,其次是运动速度,对成形宽度影响最小的是送丝速度。Magnesium alloys are the key lightweight structural metal materials for the integrated manufacturing of aerospace structural components.Accurately controlling the forming dimension of wire-arc additively manufactured magnesium alloys has always been the focus of research.Based on quadratic regression universal rrotation combination design,this work established a regression models between process parameters(such as base current,wire feed speed and travel speed)and forming characteristic dimensions.The effect of single process parameter and coupling on the forming demension was also analyzed by the response surface method.Obtained results show that the increasing base current inhibits the forming height and promotes the forming width within the range of experimental design parameters.With the increase of wire feed speed,the layer width decreases slightly and the layer height increases.As the travel speed increases,the height and width of the deposition layer decrease.The wire feed speed has the most significant influence on the forming height.While,the travel speed shows a minor influence.The base current has the most prominent impact on the forming width,while a weak influence of the wire feed speed on the forming width was found.

关 键 词：镁合金 电弧增材制造 工艺参数 成形尺寸 

分 类 号：V46[航空宇航科学与技术—航空宇航制造工程]