X-ray flexible detection technology for small-diameter pipe welds and its application
Aiming at the characteristics of spatial irregular structures for small-diameter pipe in liquid rocket engines,a flexible X-ray detection system for pipe weld was developed independently,which overcame the problem of visual recognition of complex structures,achieved automatic detection of over 500 types of engine pipes and solved the long-standing problem of difficult radiographic arrangement of pipes.The detection system can recognize,calibrate,and coordinate various pipe products automatically,and switch the gripping fixture and detection parameters adaptively according to the characteristics and specifications of different pipes.By combining robot path planning with radiographic pose programming control,the detection consistency reaches 100%.Some work was carried out to study the digital radiographic testing process by using this detection system.Good image resolution and detection sensitivity were obtained.The image quality is better than the standard requirements.Compared to the X-ray film photography,the detection time of a single pipe is shortened to 90 s,personnel labor intensity is reduced significantly,and the efficiency is increased by more than 5 times.
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