基于激光跟踪仪的大型薄壁贮箱环缝装焊在位测量技术

On-site Measurement Method for Large Thin-wall Tank’s Ring Seam Welding Based on Laser Tracker

航天产品制造过程中的在位测量是数字化制造领域的研究热点。为解决现有的液氧贮箱环缝装焊在位测量过程中可测量的关键形位公差较少、测量准确性和一致性较差、缺乏对测量过程的管理等问题,研究了基于激光跟踪仪的大型薄壁贮箱环缝装焊的在位测量方法。提出了基于遗传算法的激光跟踪仪工作位置和ERS点布局优化方法,并将该方法应用到实际的测量项目中。为提高在位测量的效率,开发了基于Visualization Toolkit可视化工具和Qt平台的在位测量软件系统。最后通过对液氧贮箱的现场应用测试验证了在位测量策略的有效性。

On-site measurement in the manufacturing process of aerospace products is a research hotspot in the field of digital manufacturing. In order to improve the welding quality of liquid oxygen tank of the rocket,an on-site measurement method based on laser tracker for large thin-wall tank ring seam welding is proposed. A genetic algorithm based laser tracker working position and ERS point position layout optimization method is proposed,and the method is applied to the actual measurement project. In order to improve the efficiency of on-site measurement,an on-site measurement system was developed based on the Visualizaiton Toolkit visualization tool and Qt platform. Finally, the effectiveness of the on-site measurement method was verified by field application testing of the liquid oxygen tank.