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赵冬斌, 陈善本, 吴林, 陈强. 填丝脉冲GTAW熔池形状定义和图像处理[J]. 焊接学报, 2001, (2): 5-8.
引用本文: 赵冬斌, 陈善本, 吴林, 陈强. 填丝脉冲GTAW熔池形状定义和图像处理[J]. 焊接学报, 2001, (2): 5-8.
ZHAO Dong-bin, CHEN Shan-ben, WU Lin, CHEN Qiang. Shape Parameter Definition and Image Processing of the Weld Pool during Pulsed GTAW with Wire Filler[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2001, (2): 5-8.
Citation: ZHAO Dong-bin, CHEN Shan-ben, WU Lin, CHEN Qiang. Shape Parameter Definition and Image Processing of the Weld Pool during Pulsed GTAW with Wire Filler[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2001, (2): 5-8.

填丝脉冲GTAW熔池形状定义和图像处理

Shape Parameter Definition and Image Processing of the Weld Pool during Pulsed GTAW with Wire Filler

  • 摘要: 在填丝脉冲GTAW过程中,从熔池图像上可以观察到熔池形状的变化,如宽度、长度、后拖角和表面高度等。熟练焊工可以根据变化的情况实时地调整焊接规范,保证焊缝成形稳定。利用获得的焊接熔池图像,采用一定的熔池图像处理算法可以计算出熔池形状的特征参数,以满足过程建模和实时控制的要求。本文针对填丝脉冲GTAW熔池形状变化的特点,提出了统一的熔池形状非线性拟合公式和熔池形状参数。设计了快速图像处理算法,满足在实际焊接过程中提取熔池形状参数的要求。试验结果证明,熔池形状非线性拟合公式准确,图像处理算法有效,为进一步焊接过程的建模和控制奠定基础。

     

    Abstract: In pulsed GTAW with wire filler, the variation of the weld pool shape could be observed from the weld pool image, such as the pool width, length, rear angles, surface height, etc. A skilled welder can adjust the welding parameters according to the variation of the weld pool shape, for ensuring the stability of the bead shape. With the captu red images of the weld pool, the shape parameters of the weld pool can be calculated using image processing algorithm, for fulfill the requirement of real time control. Aiming at the characteristic of the weld pool shape during pulsed GTAW with wire filler, this paper proposed a nonlinear regressive formula for descuribing the weld pool shape with a few shape parameters. A fast algorithm of image processing was designed for extracting the shape parameters of the weld pool in real time. The testing results indicated the accuracy of the nonlinear regressive formula, and verified the feasibility of the image processing algorithm. This laid the foundation of the further modeling and control for the welding process.

     

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