连续脉冲GTAW熔池振荡频率的检测及分析

发布时间：2018-07-07 21:55

本文选题：激光视觉 + 熔池振荡　；参考：《焊接学报》2017年10期

【摘要】：GTAW熔池振荡频率与熔池体积具有直接物理对应关系,但其振荡频率检测较为困难,尤其在连续焊接时难度很大.为此,提出了一种用于定点及连续焊接条件下熔池振荡频率特征检测的激光视觉测量方法.对定点及连续焊接条件下熔池振荡频率从未熔透到全熔透的变化规律进行了研究,并对其进行了分析.结果表明,定点焊时熔池从未熔透到全熔透仅出现一种转变模式:突变模式;在连续焊接时由于电弧作用于熔池中心点的位置偏移,造成熔池表面出现了非对称振荡模式,引起频率转变出现了两种模式:连续转变模式和突变模式.以上频率特征可用于GTAW熔透的传感与控制.
[Abstract]:The oscillation frequency of GTAW has a direct physical correspondence with the volume of molten pool, but it is difficult to detect the oscillation frequency of GTAW, especially in continuous welding. For this reason, a laser vision measurement method for detecting the frequency characteristics of molten pool oscillations under fixed and continuous welding conditions is proposed. The variation law of the oscillation frequency of the molten pool under the condition of fixed point and continuous welding has been studied and analyzed. The results show that there is only one mode of transformation from melting pool to full penetration during spot welding, and during continuous welding, asymmetric oscillation mode occurs on the surface of the molten pool due to the position deviation of the arc acting on the central point of the molten pool. There are two modes of frequency transition: continuous transformation and mutation. The above frequency characteristics can be used for the sensing and control of GTAW penetration.
【作者单位】：兰州理工大学省部共建有色金属先进材料加工与再利用国家重点实验室;兰州理工大学有色金属合金及加工教育部重点实验室;
【基金】：国家自然科学基金资助项目(51305189) 兰州理工大学红柳杰出人才培养计划资助项目(J201201);兰州理工大学优秀学生出国学习交流基金资助项目省部共建有色金属先进加工与再利用国家重点实验室开放基金资助项目(SKLAB02015008)
【分类号】：TG40

【相似文献】