Ultrasonic detection imaging method of diffusion welding connecting interface in tubular compound piece
An imaging method and ultrasonic testing technology, applied in the direction of using sonic/ultrasonic/infrasonic waves to analyze solids, can solve the problem of not ensuring that the interface of the diffusion welding connection receives sufficient ultrasonic energy, etc., to improve objectivity and reliability, and reduce leakage. Detection and false detection problems, the effect of improving the reflected wave amplitude
Active Publication Date: 2013-02-06
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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Problems solved by technology
This method cannot ensure that the interface of diffusion welding connection receives enough ultrasonic energy, and the selection of transducers for small-sized tubular composite parts is also a problem
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[0024] The present invention is described below in conjunction with accompanying drawing:
[0025] According to the morphological characteristics and sensitivity requirements of the tubular composite, the focal length of the ultrasonic transducer and the diameter of the chip are theoretically calculated, and the civa model is constructed by the software ( figure 1 ) to generate a focused probe acoustic field simulation ( figure 2 ).
[0026] According to the simulation results, the high-frequency broadband narrow-pulse water immersion lateral spherical focused ultrasonic transducer ( image 3 ).
[0027] The transducer is coupled in water and penetrates from the inner circle of the tubular composite. Under the excitation of the electric pulse, the transducer radiates broadband and narrow pulse ultrasound, which is vertically incident on the inner wall of the composite and radially penetrates into the medium of the composite. At the same time, it is connected by diffusion we...
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The invention provides an ultrasonic detection imaging method of a diffusion welding connecting interface in a tubular compound piece and belongs to the technical field of ultrasonic non-destructive test. A spherical face focusing ultrasonic transducer is immersed by stimulating high-wideband and narrow-pulse water through adopting electric pulse with adjustable frequency; water immersion and coupling are carried out; the transducer can penetrate into the inner circle of the tubular compound piece; the transducer radiates high-wideband and narrow-pulse ultrasounds to be vertically emitted into the inner wall of the compound piece under the excitation of the electric pulse and the ultrasounds are transmitted into a medium of the compound piece in a radial direction; and meanwhile, reflection echoes are generated on the diffusion welding connecting interface. The transducer can carry out full-measurement scanning on the inner wall of the tubular compound piece and receive the echoes to obtain a full-wave-train ultrasonic signal of the diffusion welding connecting interface. Software is used for carrying out time-frequency domain conversion on the full-wave-train ultrasonic signal, and characteristic extraction and imaging analysis are carried out on the ultrasonic signal, so as to obtain a quantitative direct result of the diffusion welding connecting quality. Leaked detection and incorrect detection problems of diffusion welding defect detection are reduced, and the objectiveness and reliability of the diffusion welding defect detection are improved.
Description
technical field [0001] The invention belongs to the technical field of ultrasonic nondestructive testing, and in particular relates to an ultrasonic testing imaging method for a diffusion welding connection interface in a tubular composite part. Background technique [0002] For the connection of new materials and the manufacture of complex and fine structural parts, diffusion welding technology is more and more widely used in the manufacturing industry due to its unique advantages and flexibility, and it is more and more used in the connection of important components. [0003] Domestic data have reported the use of ultrasonic methods to detect the quality of bimetallic composite layers, but they only study the flaw detection process, and use ultrasonic flaw detectors for manual flaw detection without imaging, which cannot meet the requirements of modern nondestructive testing technology, that is, not only It is necessary to judge whether there is a defect, and it is also ho...
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IPC IPC(8): G01N29/06
Inventor 黄鑫刘国辉秦思贵张鹏陈飞雄潘晨燕牛曼
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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