激光拼焊焊缝截面轮廓几何建模方法

提出了一种激光拼焊焊缝截面轮廓的几何建模方法, 基于Laws纹理滤波和数学形态学闭运算提取了截面的轮廓边缘, 分别采用多项式函数模型、指数函数模型、高斯函数模型对提取的截面轮廓边缘进行了曲线拟合, 并对拟合结果进行了误差分析。分析结果表明, 基于指数函数模型拟合的焊缝截面轮廓上边缘的精度最高, 基于高斯函数模型拟合的焊缝截面轮廓下边缘的精度最高。对不同工艺参数条件下获得的激光拼焊焊缝截面轮廓边缘进行了几何建模实验, 实验结果表明, 提出的方法可以有效地实现激光拼焊焊缝截面轮廓的几何建模。

Abstract

A geometric modeling method for the cross-sectional profile of welds in the tailored blank laser welding is proposed. The edges of the cross-sectional profile are extracted based on the Laws texture filtering and the mathematical morphological closed operation. The curve fitting for these edges of the cross-sectional profile are done with the polynomial function model, the exponential function model and the Gaussian function model, respectively. The error analysis of the fitting results is also conducted. The analysis results show that the fitting precision for the upper edge of the cross-sectional profile of welds based on the exponential function model is the highest, however the fitting precision for the lower edge of the cross-sectional profile of welds based on the Gaussian function model is the highest. The geometric modeling experiments for the edges of the cross-sectional profile of welds in the tailored blank laser welding under different welding parameters are carried out and the experimental results demonstrate that the proposed method is effective to realize the geometric modeling for the cross-sectional profile of welds in the tailored blank laser welding.

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邹媛媛, 左克铸, 李鹏飞, 蔡尚. 激光拼焊焊缝截面轮廓几何建模方法[J]. 激光与光电子学进展, 2017, 54(9): 091402. Zou Yuanyuan, Zuo Kezhu, Li Pengfei, Cai Shang. Geometric Modeling Methods for Cross-Sectional Profile of Welds in Tailored Blank Laser Welding[J]. Laser & Optoelectronics Progress, 2017, 54(9): 091402.

激光拼焊焊缝截面轮廓几何建模方法

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