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Patch method for detecting transverse residual stress of H-section steel

A residual stress, H-beam technology, applied in the field of testing, can solve the problem of non-standard stress testing, and achieve the effect of simple, easy-to-operate and accurate testing.

Inactive Publication Date: 2015-03-25
INNER MONGOLIA BAOTOU STEEL UNION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since there is no standard for the residual stress test of H-shaped steel, and there is no report on the detection of H-shaped steel by strain gauge method, the selection of the patch position is particularly important, and how to detect it is the subject of current research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] Cut a section of 500mm long from the tested H-shaped steel as the test piece, and stick a strain gauge on one side of the web of the test piece and on two straight lines 100mm from the flanges on both sides, 100mm, 250mm, and 350mm from the end of the test piece. , a total of 6 strain gauges, the length direction of the strain gauge is consistent with the height direction of the test piece, and the stress distribution state is detected. Before attaching the strain gauge, grind and clean the position where the strain gauge is attached. After the strain gauge is attached, the wire of the strain gauge is connected to the terminal, and the strain gauge is ensured to be in good condition.

[0009] Since the measured stress is the transverse residual stress, the direction of the strain gauge (length direction) should be consistent with the direction of the height of the test piece (the width of the web, called the height of the H-shaped steel), so that the strain gauge can rec...

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Abstract

The invention relates to a patch method for detecting the transverse residual stress of H-section steel. The patch method for detecting the transverse residual stress of the H-section steel is characterized in that a section of the detected H-section steel, with the length being 500 mm, is cut off to be used as a test piece, the positions 100 mm away from the end of the test piece, the positions 250 mm away from the end of the test piece and the positions 350 mm away from the end of the test piece on the two straight lines which are 100 mm away from the flanges on the two sides of one face of a web of the test piece are each provided with a strain gage in a pasting mode, six strain gages are arranged altogether, the length direction of each strain gage is consistent with the width direction of the test piece, and the stress distribution state is detected. The method has the advantages that the transverse residual stress of the H-section steel can be detected quickly and accurately, the method is simple and operation is easy.

Description

technical field [0001] The invention relates to a patch method for detecting the transverse residual stress of H-shaped steel, which belongs to the technical field of detection. Background technique [0002] The straightening of H-shaped steel is an important process in the production process, which determines the final quality and precision of H-shaped steel. The corresponding straightening process is adopted for H-beams of different specifications. In the case of ensuring that the flange and web are not bent and deformed, and the overall straightness is achieved, the residual stress is reduced, and the phenomenon of head warping and bending fracture after straightening is avoided. . [0003] Since there is no standard for the residual stress test of H-shaped steel, and there is no report on the detection of H-shaped steel by the strain gauge method, the selection of the patch position is particularly important, and how to detect it is the subject of current research. Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/00
Inventor 李国
Owner INNER MONGOLIA BAOTOU STEEL UNION