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Method for detecting whole straightness of steel pipe

A steel pipe, the overall technology, applied in the field of detection, can solve the problem of not being able to measure the overall straightness of the steel pipe effectively and quickly, and achieve the effect of increasing speed and reducing labor intensity

Active Publication Date: 2012-10-10
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] From the above introduction to the existing steel pipe straightness testing methods, it can be seen that the above-mentioned methods all have certain defects, and cannot effectively and quickly measure the overall straightness of steel pipes

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  • Method for detecting whole straightness of steel pipe
  • Method for detecting whole straightness of steel pipe
  • Method for detecting whole straightness of steel pipe

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Embodiment Construction

[0045] The method for detecting the overall straightness of steel pipes according to the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] Such as Figure 5 As shown, the preset steel pipe straightness reference value in this embodiment is 15 mm, and the radius R of the steel pipe 1 to be tested is 59 mm. When using this detection method to detect the overall straightness of the steel pipe 1: first, set the guide rail 6 The angle α between the horizontal plane and the horizontal plane is 14.2 degrees; then the steel pipe 1 to be tested is placed on the inclined guide rail 6, and the steel pipe 1 has a tendency to roll down the inclined guide rail 6 under the action of gravity G; Assuming that the steel pipe straightness reference value is 15 mm as a reference, judge the straightness of the steel pipe 1 to be tested, and the specific judgment results are shown in Table 1.

[0047] Table 1 ...

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Abstract

The invention discloses a method for detecting the whole straightness of a steel pipe, which comprises the following steps of: arranging an inclined guide rail which forms a certain included angle with a horizontal plane according to the diameter of the steel pipe to be detected and a preset steel pipe straightness reference value; judging the straightness of the steel pipe to be detected in reference to the preset steel pipe straightness reference value; determining that the straightness of the steel pipe to be detected is less than or equal to L and meets the requirement on the steel pipe straightness if the steel pipe to be detected rolls down from the inclined guide rail; and determining that the straightness of the steel pipe to be detected is more than or equal to L and does not meet the requirement on the steel pipe straightness if the steel pipe to be detected does not roll down from the inclined guide rail. By the method, the detection speed of the steel pipe straightness is greatly improved, and on-site labor intensity is reduced; and the method also can be used for detecting the straightness of an irregularly bent steel pipe.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method for steel pipe straightness. Background technique [0002] Small-diameter steel pipes are prone to bending during moving and stacking, and steel pipe bending will affect the processing and use of steel pipes in the next process. Therefore, it is of great significance to detect the overall straightness of steel pipes. [0003] At present, there are many methods for testing the straightness of steel pipes, for example, such as figure 1 The riding gauge 2 shown is a relatively common straightness inspection tool for steel pipes. Its use method is to closely fit the two legs of the riding gauge 2 on the surface of the steel pipe 1, rotate the steel pipe 1 for a circle, and observe the straightness of the riding gauge 2. The reading of the dial indicator 3, its fluctuation range is the bending degree of this section of steel pipe. Using this method can accurately detect the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B5/20G01B5/25
Inventor 张立华周立红
Owner BAOSHAN IRON & STEEL CO LTD
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