【作者】 石玗； 李春凯； 顾玉芬； 杜雷明； 张刚；

【机构】 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；

【摘要】 熔池表面的三维测量对实现GTAW焊缝熔透控制及深入理解电弧与熔池的耦合作用具有十分重要意义。基于激光视觉法的原理提出了一种新型的熔池自由表面测量方法并搭建了试验平台。在熔池表面测量试验中发现激光光路参数变化对反射激光点阵图像有较大影响。为了研究激光器入射角(q)、激光器到熔池距离(D)、成像屏到钨极距离(L)变化对传感质量的影响规律,首先建立了熔池表面标准模型及入射线、反射线、成像屏方程,利用MATLAB软件采用光学反射定律逆向仿真反射点阵的变化;并通过工艺实验对仿真的最佳参数进行了验证。结果表明,θ、D、L的最佳调节范围为28-32度、45-55mm、50-60mm;仿真结果与试验结果基本一致。更多还原

【Abstract】 Observing and measuring the three-dimensional surface of weld pool is a key to develop penetration control system and study the coupling interaction between arc and weld pool. A new method for observing the 3-D surface of weld pool based on the laser-vision is proposed. In the weld pool surface measuring experiment, the variation of optical parameters has a great influence on the sensing quality. In order to study the influence of the variation of optical parameters, the standard model of weld pool, incident line equation, reflect line equation and imaging screen equation were built and the variation of reflect point was simulated by using the optical reflection law. The result shows the best optical parameters of θ 、D、L is 28-32 、45-55mm、50-60 mm. The simulation result has a good agreement with the experimental result.更多还原