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Reference reflector test block and method for measuring weld defects of thick plates

A reflector and test block technology, which is used in measuring devices, analyzing materials, analyzing solids using sonic/ultrasonic/infrasonic waves, etc., can solve the problems of inability to comprehensively inspect the quality of welds, difficult to remove, and inability to adapt, so as to improve the detection work. Efficiency and easy operation

Active Publication Date: 2019-03-22
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
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Problems solved by technology

Ultrasonic inspection of on-site welding of building steel structures is often limited by construction conditions, and the direct beam method or single reflection method cannot fully inspect the weld quality
For example, the detection surface is obstructed and difficult to remove; one detection surface is poured with concrete, and only one detection surface is used to check the quality of the weld; In some cases, there is a large error in the echo energy, and the "distance-amplitude curve" of the weld ultrasonic flaw detection made by the direct wave method cannot be adapted to the single reflection method ultrasonic weld flaw detection, let alone the multiple reflection wave method

Method used

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  • Reference reflector test block and method for measuring weld defects of thick plates
  • Reference reflector test block and method for measuring weld defects of thick plates
  • Reference reflector test block and method for measuring weld defects of thick plates

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Embodiment

[0052] The method of using the contrast reflector test block for measuring the weld defects of thicker plates in this embodiment is as follows:

[0053] In this embodiment, the contrast reflector test block used to detect the weld seam defects of thicker plates is used to detect the strip defects in the weld seam. Use multiple reflected waves to test the depth of the hole respectively (1 / 5)t, (1 / 4)t, (1 / 3)t, (2 / 3)t, (3 / 4)t and (4 / 5) The reflected wave echo dB value of t makes the distance-amplitude curve of the hole depth. The roughness of the contrast reflector test block is the same as that of the welded steel plate, and the correction of the distance-amplitude curve may not be performed. In this embodiment, the top and bottom surfaces of the test block body 1 have the same roughness as the welded steel plate. Among them, when using multiple reflected waves to test the reflected wave echo dB values ​​of the hole depths of (1 / 5)t, (1 / 4)t and (2 / 3)t respectively, the angle pr...

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Abstract

The invention belongs to the technical field of building steel structure and metal welding, and particularly relates to a reference reflector test block and method for measuring weld defects of thickplates. The thickness of a test block body is the same as that of a weld base material to be tested, wherein the width of the test block body is greater than twice the width of an oblique probe; a first circular hole, a second circular hole, a first slot, a third circular hole and a second slot are formed in the test block body; and a distance between projections of central axes of the second circular hole and the third circular hole on a first surface or a second surface of the test block body satisfies an echo path length of at least twice reflection waves of the oblique probe. The referencereflector test block provided by the invention can reflect sound waves emitted by the oblique probe multiple times to measure weld defects, is convenient to operate, and can accurately detect weld defects of a to be tested surface having foreign matters unlikely to be removed.

Description

technical field [0001] The invention belongs to the technical field of building steel structures and metal welding, and in particular relates to a contrast reflector test block and a method for measuring weld defects of thicker plates. Background technique [0002] At present, the most commonly used methods for ultrasonic flaw detection of weld seams in building steel structures are direct beam method or primary reflection method. The test blocks used to make the distance-amplitude curves for ultrasonic flaw detection of welds are all used in the direct wave method. On-site welding ultrasonic testing of building steel structures is often limited by construction conditions, and the direct beam method or single reflection method cannot fully inspect the weld quality. For example, the detection surface is obstructed and difficult to remove; one detection surface is poured with concrete, and only one detection surface is used to check the quality of the weld; Under normal circ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/30G01N29/11
CPCG01N29/043G01N29/11G01N29/30G01N2291/015G01N2291/0289G01N2291/044G01N2291/056G01N2291/2675
Inventor 杨晓东杨天宇李杰
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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