CO2气保护药芯焊丝工艺性评价方法.pdf

维普资讯 学兔兔 第44卷第4期 机 械 工 程 学 报 v。1．44 No．4 2008年 4月 CHINESE JOURNAL OF MECHANICAL ENGINEERING Apr． 2008 CO2气保护药芯焊丝工艺性评价方法 王 勇 王 宝2 (1．太原理工大学焊接材料研究所 太原 030024； 2．中北大学焊接材料技术中心 太原 030051) 摘要：CO2气保护药芯焊丝熔滴行为对药芯焊丝工艺性有直接的影响，不同的熔滴行为可间接反映在焊接过程电信号的变化 中。利用汉诺威弧焊分析仪对CO2气保护药芯焊丝的焊接电参数进行测试分析，提取短路大电流概率密度和、短路过渡频率、 瞬时短路频率以及瞬时短路时间和等与药芯焊丝工艺性紧密相联的4个特征信息。然后，采用主成分分析法确定药芯焊丝工 艺性评价指数，对药芯焊丝工艺性进行定量化评价，从而为科学评价药芯焊丝工艺性提供了新方法。 关键词：药芯焊丝 焊丝工艺性 熔滴过渡 主成分分析 评价方法 中图分类号：TG42 Evaluation Method of Usability of the Flux·cored Wire in CO2 Arc Welding WANG Yong WANG Bao (1．Institute of Welding Materials，Taiyuan University of Technology,Taiyuan 030024； 2．Training Center ofWelding Consumables Technology,North University ofChina，Taiyuan 03005 1) Abstract：Metal transfer behaviors of the flux。cored wire in CO2 arc welding have a direct effect on usabilit)r of the flux—cored wire． These behaviors are indirectly showed in welding electric signals．Using the ANALYSATOR HANNOVER．welding electric parameters of the flux-cored wires in CO2 arC welding are measured and analyzed．Four characteristic information values closely correlated with usability of the flux-cored wire are extracted,such aS the sum of probability density of big short-circuiting current， frequency of short—circuiting transfer,frequency ofbrief short circuit and the sum ofbrief short-circuiting time，and then method of principal component analysis is applied to determining evaluation index of usability of the flux-cored wire．Usability of the flux—cored