推力室钎焊身部X射线数字成像检测技术

针对常规运载火箭发动机推力室钎焊身部钎焊质量检测需求,深入开展了钎焊身部X射线数字成像自动检测系统与检测工艺研究。研制开发了X射线数字成像自动检测系统,介绍了系统组成与特点。利用该系统开展了分区透照试验,确定了分区数量与机器人路径规划,完成了程序示教。开展了检测灵敏度试验,并与常规X射线胶片照相方法进行了试验对比分析。结果表明该检测系统与工艺可以满足检测要求,能有效检测出2 mm×1.5 mm未钎着缺陷与0.5 mm冷却通道堵塞。与射线胶片照相手工拍片相比,其影像变形小、图像宽容度大,提高了缺陷检出率与检测可靠性及一致性,效率提升了3倍。利用该检测工艺检测通过的产品已经完成了试车及飞行任务考核。

X-ray digital imaging detection technology for brazed body of thrust chamber

Aiming at the requirement of brazing quality inspection of brazing body in thrust chamber of hypergolic rocket engine,the research on X-ray digital imaging automatic inspection system and inspection technology of brazing body was carried out.An automatic X-ray digital imaging detection system was developed.This system was used to carry out zonal penetration test,determine the number of zones and robot path planning,and complete the program teaching.The sensitivity test was carried out and compared with the conventional X-ray film method.Results show that the detection system and the technology can meet the test requirements,can effectively detect the 2 mm×1.5 mm not soldering defects and0.5 mm cooling channel congestion.Compared with manual radiography,the image deformation is small and the image width is large,which improves the defect detection rate,detection reliability and consistency,and the efficiency is increased by three times.The products that passed the tests have completed the test run and flight mission assessment.