Study on Mathematical Modeling of the 3-D Butt joint for Laser Welding
In order to realize precise laser welding of the aerospace thin sheet parts, it is necessary to model the 3-D butt joint accurately. Due to narrow seam gap and little misalignment of the butt joint, it is difficult to extract all the feature information such as 3-D seam position, surface normal and gap width in a lump by traditional methods or sensors. Furthermore, these feature information acquired by laser vision sensor are just expressed in local measuring coordinate system, which cant be used for global modeling directly. In this paper, a mathematical modeling method based on the kinematic model of the laser welding & measuring machine tool was proposed. The machine tools form-shaping function matrix was derived according to the homogeneous coordinate transformation matrix and the kinematic parameters. By using this form-shaping function matrix, the measured data could be converted into global data stably and accurately. Through Bspline surface fitting, the 3-D butt joints mathematical model including all the feature information was established. Experimental results demonstrate the effectiveness of the proposed method.
3-D butt joint mathematical model laser welding multi-axis machine tool
YANG JianZhong WANG BaoShan HUANG Ke DU Xuan PENG FangYu
Department of Mechanical Science & Engineering Huazhong University of Science & Technology Wuhan, China
国际会议
重庆
英文
523-527
2011-01-21（万方平台首次上网日期，不代表论文的发表时间）