铝合金氩弧焊接角变形动态过程表征  

Characteristics of dynamic welding angular distortion of an aluminum alloy with TIG welding

作　　者：王蕊[1] 梁振新[1] 张建勋[1] 

机构地区：[1]西安交通大学材料科学与工程学院,西安710049

出　　处：《焊接学报》2007年第3期29-32,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50475093);现代焊接生产技术国家重点实验室开放课题教育部博士点基金资助项目(20030698018)

摘　　要：利用温度与变形实时测量系统,对铝合金5A12薄板氩弧焊接动态角变形过程进行了试验研究,探讨通过特征值来描述角变形动态行为。通过对温度及变形动态曲线的分析,提出了焊接动态角变形过程的两个特征值,即下挠最大值点和上翘平衡点。并采用正交试验法,研究不同焊接参数条件下动态角变形曲线的变化规律,构建焊接角变形的动态特征曲线的数学模型。结果表明,动态变形特征曲线的数学表达式能够反映焊接角变形的动态变化趋势,下挠最大值、上翘平衡值及下挠和上翘过程中曲线斜率的变化是描述动态变形曲线变化趋势的关键因素。The characteristics of dynamic welding angular distortions of aluminum alloy 5A12 with TIG welding are investigated by self-made welding dynamic temperature and distortion measuring system.With analyzing the welding thermal cycle and dynamic angular distortion curves,two characteristic values,the down warping maximum point and warping balanced point are put forward to describe the dynamic curve behavior.The changing rules of the dynamic curves under different welding parameters are investigated by means of orthogonal experiment method.Based on the results,mathematic model on the dynamic angular distortion curve is introduced.The results show the dynamic angular distortion can be expressed by the mathematic formula accurately.The down warping maximum point,warping balanced point and the slops of the curves are the key factors that characterize the dynamic angular distortion curves.

关 键 词：铝合金 动态变形 动态特征曲线 数学模型 

分 类 号：TG43[金属学及工艺—焊接]