Water immersion ultrasonic C detection brazing defect method for refracted wave vertical brazing surface
A water immersion ultrasonic and brazing surface technology, which is applied in the field of measurement and control, can solve the problems of inability to detect brazing defects and obtain echoes of brazing surface defects, achieve clear prefabricated defects, clear brazing boundaries, and improve detection accuracy Effect
Pending Publication Date: 2022-06-28
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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[0003] At present, ultrasonic C-scanning is usually used to detect brazing defects, but for brazed components with complex structures, where the brazing surface is not parallel to the incident surface, the traditional ultrasonic C-scan method of perpendicular incident surface incidence is used, and the refracted waves are obliquely incident on the brazing surface. surface, the defect echo of the brazing surface cannot be obtained, and the brazing defect detection cannot be realized
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[0056] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
[0057] The embodiment of the present application is a method for detecting brazing defects by water immersion ultrasonic C on a refracted wave vertical brazing surface, and the specific process is as follows:
[0058] Obtain the scanning points of the brazing surface;
[0059] Based on the constraint condition that the refracted wave is perpendicular to the scanning point of the brazing part to be tested, the incident point on the incident surface corresponding to each scanning point and the unit vector of the incident wave direction are calculated. According to the incident point and the unit vector of the incident wave direction Vector, calculate the detection trajectory of the water immersion ultrasonic testing equipment;
[0060] Ultrasonic C-scanning detection is performed on the brazing part to be tested according to the detection track, and defe...
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The invention discloses a water immersion ultrasonic C detection brazing defect method for a refracted wave vertical brazing surface. The method comprises the following specific steps: acquiring a scanning point location of the brazing surface; based on the constraint condition that refracted waves are perpendicular to the scanning point positions of the to-be-detected brazing part, an incidence point and an incidence wave direction unit vector on the incidence plane corresponding to each scanning point position are calculated, and according to the incidence points and the incidence wave direction unit vectors, the detection track of the water immersion ultrasonic detection equipment is calculated; and performing ultrasonic C scanning detection on the to-be-detected brazed part according to the detection track, and realizing defect detection on the to-be-detected brazed part by utilizing the obtained ultrasonic C scanning image of the brazed surface. According to the invention, the defect echo of the brazing surface can be obtained, and brazing defect detection is realized.
Description
technical field [0001] The invention belongs to the technical field of measurement and control, and in particular relates to a method for detecting brazing defects by water immersion ultrasonic C of a refracted wave perpendicular to a brazing surface. Background technique [0002] Under the development trend of product structure integration, light weight, low cost and high reliability, welded structures are widely used in aerospace, automotive, shipbuilding, nuclear energy, electronics and other industrial fields. Brazing technology is valued by the manufacturing industry because of its advantages of simple equipment, small deformation after welding, and high productivity. During the brazing process, due to the combined effect of various complex factors such as brazing materials, processes and environments, defects such as pores, unfused, and cracks often occur in the joints. The existence of brazing defects directly affects the performance and reliability of the product. S...
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IPC IPC(8): G01N29/06G01N29/28G01N29/44
CPCG01N29/069G01N29/28G01N29/4463
Inventor 周世圆刘逯航郑翀赵灿郝娟杜佩承王永红
Owner BEIJING INSTITUTE OF TECHNOLOGYGY