Development of Evaluation Technique of GMAW Welding Quality Based on Statistical Analysis

查看全文 作　　者：FENG [1]Shengqiang;TERASAKI [2]Hidenri;KOMIZO [2]Yuichi;HU [3]Shengsun;CHEN [1]Donggao;MA [1]Zhihua

机构地区：[1]Ningbo Branch of China Academy of Ordnance Science;[2]Joining and Welding Research Institute, Osaka University,Osaka 567-0047,Japan;[3]Tianjin Key Laboratory of Advanced Joining Technology,Tianjin University

出　　处：《Chinese Journal of Mechanical Engineering》索引2014年第27卷第6期,共7页

基　　金：Supported by Ningbo Municipal Natural Science Foundation of China (Grant No.2014A610063) 摘　　要：Nondestructive techniques for appraising gas metal arc welding(GMAW) faults plays a very important role in on-line quality controllability and prediction of the GMAW process. On-line welding quality controllability and prediction have several disadvantages such as high cost, low efficiency, complication and greatly being affected by the environment. An enhanced, efficient evaluation technique for evaluating welding faults based on Mahalanobis distance(MD) and normal distribution is presented. In addition, a new piece of equipment, designated the weld quality tester(WQT), is developed based on the proposed evaluation technique. MD is superior to other multidimensional distances such as Euclidean distance because the covariance matrix used for calculating MD takes into account correlations in the data and scaling. The values of MD obtained from welding current and arc voltage are assumed to follow a normal distribution. The normal distribution has two parameters: the mean ? and standard deviation of the data. In the proposed evaluation technique used by the WQT, values of MD located in the range from zero to ?+3? are regarded as 'good'. Two experiments which involve changing the flow of shielding gas and smearing paint on the surface of the substrate are conducted in order to verify the sensitivity of the proposed evaluation technique and the feasibility of using WQT. The experimental results demonstrate the usefulness of the WQT for evaluating welding quality. The proposed technique can be applied to implement the on-line welding quality controllability and prediction, which is of great importance to design some novel equipment for weld quality detection. 关键词：焊接质量评价技术 GMAW 统计分析熔化极气体保护焊正态分布马氏距离在线质量

相关文献

参考文献（21）
引证文献（3）
耦合文献（196）

参考文献(21)

引证文献(3)

耦合文献(196)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Development of Evaluation Technique of GMAW Welding Quality Based on Statistical Analysis

参考文献(21)

引证文献(3)

耦合文献(196)

用户提示