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Double-roller oblique-rolled steel tube oblique defect magnetic leakage detection method and detection device

A technology for magnetic flux leakage detection and steel pipe rolling, applied in the direction of material magnetic variables, etc., can solve the problems of magnetic leakage detection of oblique defects in steel pipes, and achieve the effect of highlighting substantive characteristics and improving detection capabilities.

Inactive Publication Date: 2017-01-04
烟台鲁宝钢管有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention mainly solves the problem of magnetic flux leakage detection of oblique defects of steel pipes produced by two-roll cross-rolling process with existing detection equipment

Method used

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  • Double-roller oblique-rolled steel tube oblique defect magnetic leakage detection method and detection device
  • Double-roller oblique-rolled steel tube oblique defect magnetic leakage detection method and detection device
  • Double-roller oblique-rolled steel tube oblique defect magnetic leakage detection method and detection device

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Experimental program
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Effect test

Embodiment 1

[0024] Example 1, see figure 1 According to the design requirements, it is processed into the installation base plate 1, the front support plate (installation side plate) 2, the rear support plate (installation side plate) 3, the oblique magnetization coil 4, the oblique magnetization circuit device 5, the fixed guide rail 6, the oblique To the detection plate 7, probe support and adjustment device 8, oblique probe 9; fix the front support plate (installation side plate) 2, rear support plate (installation side plate) 3 on the front and rear sides of the installation base plate 1 respectively, and fix the The guide rail 6 is installed in the middle of the installation base plate 1, the oblique magnetization coil 4 is installed on the inner side of the front support plate (installation side plate) 2, and the oblique magnetization circuit device 5 is installed on the inner side of the rear support plate (installation side plate) 3; There is a round hole in the middle of the dete...

Embodiment 2

[0025] Embodiment 2, using the device of the above embodiment to realize the magnetic flux leakage detection method for oblique defects of two-roll cross-rolled steel pipes, including the following process steps:

[0026] a Find out the angle distribution law of the oblique defects of the steel pipes produced by the two-roll cross-rolling process; through the statistics of the angle distribution of the oblique defects of the steel pipes of different specifications, the results show that the steel pipes produced by the two-roll cross-rolling process are The process characteristics of the oblique defects are related to the outer diameter of the steel pipe. The oblique defects of the steel pipes with four outer diameter specifications of Φ159mm, Φ168mm, Φ194mm, and Φ203mm are distributed at two angles; the oblique defects of the steel pipes with two outer diameter specifications of Φ219mm and Φ245mm The defects are distributed in 4 angles; the oblique defects of steel pipes with o...

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Abstract

The invention discloses a double-roller oblique-rolled steel tube oblique defect magnetic leakage detection device which is composed of a mounting bottom plate (1), a front supporting plate (2), a back supporting plate (3), an oblique magnetizing coil (4), an oblique magnetic gathering loop unit (5), a fixed guide rail (6), an oblique detection tray (7), a probe supporting and adjusting unit (8) and an oblique probe (9). The device is characterized in that the width of the mounting joint face between the probe supporting and adjusting unit (8) and the oblique probe (9) is doubled, and the oblique probe (9) wafer adopts angular mounting. The oblique detection tray (7) can replace the oblique probe (9) at specific angle according to the natural defects of different external diameters. According to the detection method, the oblique probe at specific angle is mounted through the oblique detection host machine platform, so that the oblique probe angle is consistent with the defect angle; and thus, the oblique defects can be effectively detected, thereby greatly enhancing the detectability of the flaw detection equipment and satisfying the field demands.

Description

[0001] Technical field: [0002] The invention relates to the technical field of non-destructive testing in the steel pipe manufacturing industry, in particular to a magnetic flux leakage detection method and a detection device for oblique defects of two-roll cross-rolled steel pipes. [0003] Background technique: [0004] The detection of longitudinal and transverse rolling defects of steel pipes is the basic requirement for non-destructive testing of steel pipes. Most of the existing magnetic flux leakage testing equipment only has the function of transverse and longitudinal detection. [0005] During the rolling process of steel pipes, some special shapes and special types of oblique defects, such as spiral, linear, point-flaky outward folds, rolling pits, peeling, etc., will inevitably occur due to technological reasons, especially when the two-roll cross-rolling process is used. steel pipes. If the length of these defects is large, and the deviation from the circumferent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/83
CPCG01N27/83
Inventor 王仁波林树阳王旭午宁寿陈
Owner 烟台鲁宝钢管有限责任公司
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