异型工件全局逼近NURBS曲线焊接轨迹生成的研究

发布时间：2018-01-10 17:21

本文关键词：异型工件全局逼近NURBS曲线焊接轨迹生成的研究　出处：《焊接》2017年09期 　论文类型：期刊论文

【摘要】：单件小批量工件的自动化焊接中,焊接轨迹的生成过程操作复杂,为此以焊缝在平面内的焊接工件为研究对象,研发了一种异型工件自动焊接装置,提出了一种基于机器视觉的异型工件焊接轨迹在线生成的方法。通过图像识别并提取出异型工件外形轮廓,将最小二乘算法应用于NURBS曲线插补,实现了最小二乘NURBS曲线全局逼近拟合,在线生成工件轮廓的焊接运动轨迹。结果表明该算法具有较高的精度和效率,能快速在线生成各种工件外形轮廓的平滑焊接轨迹,避免了焊接过程中的抖动问题,保证了焊接质量。
[Abstract]:In the automatic welding of single small batch workpiece, the process of generating welding track is complicated. Therefore, a kind of special workpiece automatic welding device is developed, which takes welding workpiece in the plane of weld seam as the research object. This paper presents an on-line generation method of abnormal workpiece welding trajectory based on machine vision. The contour of abnormal workpiece is recognized and extracted by image, and the least square algorithm is applied to NURBS curve interpolation. The global approximation fitting of the least square NURBS curve is realized and the welding motion trajectory of the workpiece contour is generated online. The results show that the algorithm has high precision and efficiency. The smooth welding trajectory of all kinds of workpiece contour can be generated quickly and on-line, and the jitter problem in welding process can be avoided, and the welding quality can be ensured.
【作者单位】：华南理工大学机械与汽车工程学院;
【基金】：国家04科技重大专项(2015ZX04005006) 广东省科技重大专项(2014B090921004,2015B010918002) 广州市科技重大项目(2014Y2-00014)
【分类号】：TG409
【正文快照】： 0序言自动焊接技术在工业及制造领域均得到广泛的应用和提高,市场上也出现了很多针对某一产品的自动焊接装置。这些自动焊接装置工作稳定,生产效率高,能够适应恶劣的生产环境,但是这些自动焊接装置一般只针对特定的焊接工件,采用示教再现[1-3]的方式进行生产,缺乏对焊接过程中

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