高速三弧MAG焊动态稳定行为与焊缝成形机理研究

项目名称： 高速三弧MAG焊动态稳定行为与焊缝成形机理研究

项目编号： No.51275299

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 华学明

作者单位： 上海交通大学

项目金额： 80万元

中文摘要： 高速熔化极气体保护焊可以提高焊接效率、降低焊接成本。本课题针对舰船用中厚板的焊接制造，提出研究新型高速三弧MAG焊接方法的动态稳定行为与焊缝成形机理。利用理论分析、数值分析和试验相结合的方法，研究高速三弧MAG焊耦合电弧的物理特性及其对熔滴过渡行为的影响，揭示动态传热与传质的稳定控制因素；研究多弧耦合的焊丝熔化特性，揭示稳定焊接工作点的迁移途径，建立高速三弧MAG焊熔滴过渡动态稳定的弧源匹配原则；研究高速MAG焊的熔池熔体行为，阐明三弧耦合对熔池流动的影响机理;研究三弧耦合提高焊接速度的机制，揭示高速熔凝过程中缺陷的产生机制,建立获得良好焊缝成形的控制方法。本课题的研究成果，为研发焊接速度达到甚至超过2m/min的高速MAG焊接技术具有理论指导意义。

中文关键词： 高速焊接；电弧干扰；焊缝成形；MAG焊；等离子体

英文摘要： High-speed triple arc MAG welding can improve efficiency and reduce cost. This subject is for welding on ships with medium and heavy plates, a newly high-speed triple arc MAG welding was developed. Based on theoretical analysis, numerical analysis and comparison tests, physical characteristic of the high-speed MAG welding multi-coupling arc and its effect on droplet transfer behavior will be sthdied, to reveal the controlling factors of stability of heat and mass transfer; Wire melting characteristics of multi-coupling arc will be studied,to reveal the migration path of stable welding operating point,then,establish the droplet transfer dynamic stability matching principle of arc and power supply of high-speed triple arc MAG welding;Melt behavior in welding pool of high-speed MAG welding was studied, to clarify the mechanisms of the defect generation in high-speed melting process;The mechanism for improving the welding speed of triple arc coupling welding is studied, to establish a good control method for weld forming.The research subject is theoretically significant for high-speed welding technology, especially for welding speed to achieve even more than 2m/min.

英文关键词： High speed welding；arc interference；weld forming；MAG welding；arc plasma