间隙型薄板TIG焊熔孔影响因素分析  

Analysis on the influence factors of fusion hole in TIG welding of gap sheet

作　　者：李传宗 桂万军 高进强[1,2] LI Chuanzong;GUI Wanjun;GAO Jinqiang(School of Materials Science and Engineering,Shandong University,Ji'nan 250061,China;Jiangsu Sangle Digital Solar Energy Co.,Ltd.,Huaian 223300,China)

机构地区：[1]山东大学材料学院,山东济南250061 [2]江苏桑乐数字化太阳能有限公司,江苏淮安223300

出　　处：《电焊机》2019年第4期200-205,共6页Electric Welding Machine

基　　金：国家自然科学基金资助项目(51675309)

摘　　要：针对3 mm厚304不锈钢板开展了一系列预留间隙TIG焊接实验。通过CMOS视觉检测系统拍摄到清晰的正面熔孔图像;通过MATLAB图像处理工具设计了符合熔孔图像特征的图像处理算法,成功获取熔孔-间隙边缘,计算出熔孔宽度和间隙宽度。结果表明,熔孔稳定存在的焊接参数窗口相对较窄,在未加调控时,大多数情况下熔孔只能维持4～5 s。在焊接速度恒定时,焊接电流和预留间隙是影响熔孔尺寸的重要因素。其他参数不变,焊接电流增大,熔孔宽度增大;预留间隙增加,熔孔宽度也增大,且呈现出相似的变化规律。A series of reserved TIG welding experiments are carried out on a 3 mm thick 304 stainless steel plate. A clear image of the front fusion hole is captured by the CMOS vision detection system. By MATLAB image processing tool,the image processing algorithm in line with the characteristics of the fusion hole image is designed,the fusion hole-gap edge is gained,and the widths of the fusion hole and gap are calculated. The results show that the welding parameter window with stable fusion hole is relatively narrow,and the fusion hole can only maintain 4~5 s without adjustment in most cases. When the welding speed is constant,the welding current and the reserved gap are the important factors affecting the size of the fusion hole. Other parameters remain unchanged,the width of the fusion hole increases as the welding current increases;the width of the fusion hole also increases as the reserved gap increases,and shows a similar change rule.

关 键 词：预留间隙 图像处理 熔孔宽度 

分 类 号：TG403[金属学及工艺—焊接]