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Cutting method for detecting lateral bending residual stress of H-shaped steel

A technology of residual stress and lateral bending, which is applied in the detection field, can solve the problems that there is no standard for the stress test of H-beams, and the strain gauge method can detect H-beams, etc., so as to achieve the effects of simple operation, improved accuracy and reduced losses

Inactive Publication Date: 2015-04-01
INNER MONGOLIA BAOTOU STEEL UNION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because there is no standard for the residual stress test of H-shaped steel, there is no report on the detection of H-shaped steel by the strain gauge method. 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

[0010] Cut a section of 500mm long from the tested H-beam as a test piece, and cut a 400mm long slit longitudinally at the center of the web at one end of the test piece to release the residual stress.

[0011] Since the measured stress is the lateral bending stress, the cutting direction is the length direction of the test piece, so that the test piece can release the stress without restraint, so as to truly measure the force condition of the H-beam when it is bent forward. The cutting direction is not correct. , the measured stress value is not the bending stress value, or the result cannot be measured or the data is inaccurate.

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Abstract

The invention relates to a cutting method for detecting lateral bending residual stress of H-shaped steel. The cutting method is characterized in that a 500 mm long section of detected H-shaped steel is cut and taken as a testing piece, a 400 mm long gap is longitudinally sawed in the center position of a web at one end of the testing piece, and residual stress is released. The cutting method has the advantages of simplicity and convenience in operation, accuracy improvement, loss reduction and cost saving.

Description

technical field [0001] The invention relates to a cutting method for detecting the lateral bending residual stress of H-shaped steel, which belongs to the field of detection. Background technique [0002] H-beams are mainly used in bridges, ocean engineering, mechanical equipment, houses, highways, industrial buildings, oil drilling platforms, etc. With the vigorous development of my country's infrastructure, large-scale H-beams can no longer meet the needs of construction and development, so there is an urgent need Develop large H-beams. [0003] 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 ...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N19/00G01L1/22G01L1/26
Inventor 李国
Owner INNER MONGOLIA BAOTOU STEEL UNION
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