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Ultrasonic phased array inspection method for U-rib bilateral fillet weld

An ultrasonic phased array and detection method technology, which is applied to the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, material analysis using sound waves/ultrasonic waves/infrasonic waves, and measuring devices. It can solve the problems of low precision, low work efficiency, and quantitative accuracy. Poor and other problems, to achieve the effect of ensuring welding quality, strong practicability, and intuitive readings

Inactive Publication Date: 2017-04-19
WUCHUAN HEAVY ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Penetration measurement of fillet welds using conventional ultrasonic UT or ray RT techniques is difficult and inaccurate
It is difficult for UT inspection to distinguish the unpenetrated top signal from other defect signals or geometric reflection signals, and the resolution is poor
Moreover, the measurement of incomplete penetration relies on the amplitude method, and the quantitative accuracy is poor, which basically cannot meet the requirements for measurement accuracy in bridges.
Due to the need for back-mounting, RT technology is extremely difficult to construct and has low work efficiency. It is difficult to meet the needs of the project progress and the cost is also high. On the other hand, the transillumination thickness difference is large, so the imaging quality is poor and the sensitivity is low. use
Moreover, there is no research on the detection method for U-rib bilateral fillet welds in the prior art

Method used

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Embodiment 1

[0044] Such as figure 1 As shown, Embodiment 1 of the present invention uses the ultrasonic phased array detection method to detect the penetration depth of U-rib bilateral fillet welds, including the following steps:

[0045] S101: Use an ultrasonic phased array probe to move and scan the outer surface of the U-rib web;

[0046] S102: Using the defect signal image endpoint reading method to read the depth values ​​of the two endpoints of the defect signal image;

[0047] S103: The difference between the depth values ​​of the two endpoints is taken as the non-penetration height value of the U rib bilateral fillet weld;

[0048] S104: The thickness of the U-rib plate minus the value of the unpenetrated height is the U-rib weld penetration.

[0049] figure 2 It is a schematic diagram of the use state of using the ultrasonic phased array detection method to detect the penetration depth of U-rib bilateral fillet welds in Embodiment 1 of the present invention. Such as image ...

Embodiment 2

[0055] Embodiment 2 of the present invention uses an ultrasonic phased array detection method to detect the penetration depth of U-rib bilateral fillet welds, including the following steps:

[0056] S201: Use an ultrasonic phased array probe to move and scan the outer surface of the U-rib web;

[0057] S202: Using the defect signal image endpoint reading method to read the depth values ​​of the two endpoints of the defect signal image;

[0058] S203: the difference between the depth values ​​of the two endpoints is taken as the non-penetration height value of the U rib bilateral fillet weld;

[0059] S204: The thickness of the U rib plate minus the value of the unpenetrated height is the penetration depth of the U rib weld.

[0060] The frequency of the phased array probe is 5MHZ, the number of chips is 32, and the chip spacing is 0.31mm.

[0061] The phased array probe moves on the outer surface of the U-rib web along the direction of the U-rib outer fillet weld bead.

Embodiment 3

[0063] Embodiment 3 of the present invention uses the ultrasonic phased array detection method to detect the transverse crack of the U-rib bilateral fillet weld comprising the following steps:

[0064] The ultrasonic phased array probe is used to scan the surface of the fillet weld to detect transverse cracks, that is, the probe rides on the surface of the outer weld bead of the U rib to move back and forth. However, the phased array flaw detection itself still emits ultrasonic beams from multiple angles for weld detection.

[0065] The frequency of the phased array probe is 5MHZ, the number of chips is 16, the chip spacing is 0.4mm, and the wedge width is 10mm.

[0066] The model of the GE ultrasonic phased array equipment is PHOSOR XS.

[0067] Figure 5 It is a schematic diagram of the use state of using the ultrasonic phased array detection method to detect the transverse cracks of the U-rib bilateral fillet welds in Embodiment 3 of the present invention. Such as Imag...

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Abstract

The invention provides an ultrasonic phased array inspection method for U-rib bilateral fillet weld. The bilateral sides contain U-rib inner side and outer side. The inspection method comprises the following steps: scanning along the surface of the outer side of the U-rib web by the adoption of an ultrasonic phased array probe; and by a defect signal image endpoint reading method, reading is carried out to obtain information of defect signal image in the fillet weld. Unfused height and welding quality defect of the U-rib bilateral fillet weld can be inspected, and the problem that existing inspection methods are limited to the size of a U-rib structure and only can inspect U-rib outer-side fillet weld is avoided. According to the invention, nondestructive test of U-rib bilateral fillet weld is realized, and welding quality of U-rib weld is fully guaranteed.

Description

technical field [0001] The invention relates to the manufacturing technology of steel structure bridges, in particular to an ultrasonic phased array detection method for U-rib double-sided fillet welds. Background technique [0002] Orthotropic steel bridge decks have the advantages of light weight and rapid construction, and are widely used in long-span bridges. However, due to the impact of vehicle loads and stress concentration on structural details, various fatigue cracking problems are prominent, which has always plagued bridge builders. . The fatigue problems of bridge deck welds are mainly manifested in U-rib welds, and the effective penetration depth and internal quality of U-rib welds directly affect its fatigue performance. [0003] At present, the non-destructive testing of steel box girder bridge deck U-ribs at home and abroad mainly uses magnetic particle testing. Magnetic particle testing is a detection method for surface and near-surface defects, and cannot i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/06
CPCG01N29/069G01N2291/0234G01N2291/2675
Inventor 张华李立明孙雅洲吴跃波万仲恒高兴郭萍萍黄峰
Owner WUCHUAN HEAVY ENG
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