摘要
以航天薄壁结构件用2219铝合金变极性钨极惰性气体保护焊(GTAW)为背景,设计和研制了一套基于多信息传感的机器人变极性GTAW焊缝成形模糊控制系统.采用视觉传感系统实时获取焊缝的间隙和错边量,并利用相应的图像处理方法获取液态2219铝合金熔池的正面特征信息;采用模糊逻辑控制方法进行焊缝参数的在线调整和补偿控制,以确保焊缝熔透及其成形的均匀性.结果表明,对于厚度为8mm的2219铝合金对接焊,采用所设计的模糊控制系统能够根据焊缝的间隙量和错边量来实时调整焊接电流和送丝速度,使其熔池正面宽度较为稳定,从而保证了焊缝熔透及其成形均匀.
Based on the application of the variable polarity gas tungsten arc welding （GTAW） with the 2219 aluminium alloy in space thin-walled structure, a set of variable polarity GTAW control system was designed and developed based on multiple information sensing, which can detect the gap and mismatch o{ the weld-seam with the visual sensing system in real time. Besides, an corresponding image processing algorithm was developed to obtain the characteristic information of the molten pool. In addition, a fuzzy logic control method was adopted to improve the welding parameters online and to compensate the control system, for the sake of ensuring the penetration and forming uniform of the 2219 aluminium alloy. The experiment results of aluminium plate （8 mm） show that the fuzzy control system is able to adjust the welding parameters online according to the gap and mismatch of the weld-seam, and is able to ensure the penetration and forming uniform of the weld-seam.
作者
梁明龙
周凯荣
倪加明
马宏波
陈善本
陈华斌
LIANG Minglong ZHOU Kairong NI Jiaming MA Hongbo CHEN Shanben CHEN Huabin(School of Material Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China Shanghai Aerospace Precision Machinery Research Institute, Shanghai 201600, China Jiangsu Beiren Robot System Co. Ltd. , Suzhou 215021, Jiangsu, China)
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2016年第10期1583-1587,共5页
Journal of Shanghai Jiaotong University
基金
国家智能制造装备发展专项(2014-2558)资助
关键词
铝合金
变极性
钨极惰性气体保护焊
熔池
间隙
模糊控制
aluminium alloy
variable polarityl gas tungsten arc welding （GTAW）
weld pool
gap
fuzzy control
作者简介
梁明龙（1991-），男，广东省信宜市人，硕士生，主要从事铝合金变极性GTAW视觉信息检测与焊缝成形研究．
陈华斌（联系人），男，副教授，电话（Tel．）：021-34202740-807；E-mail：hbchen@sjtu．edu．cn．
