不同参数下MIG焊电弧光谱波动特点  

Spectrum of MIG arc at different welding parameters

作　　者：李志勇[1] 张文朝[1] 李岩[1] 丁京滨[1] 

机构地区：[1]中北大学焊接研究中心,太原030051

出　　处：《焊接学报》2013年第1期45-48,52,共5页Transactions of The China Welding Institution

基　　金：山西省自然科学基金资助项目(2010011031-3);山西省回国留学人员科研资助项目(2012-69);山西省优秀青年学术带头人资助项目(2009)

摘　　要：熔化极惰性气体保护焊(MIG)过程中,熔滴过渡、弧长波动等会引起辐射的剧烈变化,其变化规律对于焊接质量检测具有重要意义.文中通过采集不同参数下的MIG焊电弧光谱分布,研究其在焊接过程中的变化规律;并结合该参数下熔滴过渡特征,基于电弧物理理论,对典型参数下光谱波动的规律进行物理解释.结果表明,不同参数下电弧光谱的分布和变化规律不同,具有各自的光谱分布特征;在MIG焊接过程中,由于熔滴过渡会造成光谱信息的规律波动,但在过渡的不同时间段,光谱信号在不同谱段(紫外区、可见光区、近红外区)的变化规律存在较大差异.The droplet transfer mode and arc length variation are the significant factors affecting the radiation intensity of arc plasma for MIG welding.It is critical to understand the regularity of the radiation fluctuation in application in industry control of the welding process.Therefore,the spectrum of MIG arc radiation was collected with a spectrometer based system.The spectrums of welding processes at different welding parameters were analyzed to study the regularity of the radiation variation.Based on the arc physics,the spectral information combining with the droplet transfer mode was used to get a better understanding of the arc radiation.The results show that the arc spectrum with its distinct distribution is different at different welding parameters.The MIG arc emits wavy radiation due to droplet transfer.The spectral signals in different spectrum bands,such as ultraviolet,visible and near infrared band,have totally different variation characteristics during different instance of the droplet transfer.

关 键 词：电弧光谱 焊接参数 MIG焊 熔滴过渡 

分 类 号：TG422[金属学及工艺—焊接]