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A method for inspecting surface defects of thermally straightened steel plates

An inspection method and thermal straightening technology, applied in the direction of length measuring devices, instruments, manufacturing tools, etc., can solve the problems of long cooling process and large product accidents, and reduce the occurrence rate of re-judgment, reduce defects, and repair and re-judgment costs. reduced effect

Active Publication Date: 2019-06-04
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the rolled steel plate is straightened by a hot leveler after passing through laminar flow cooling, surface automatic detection equipment, downcoiler, and then cooled and followed by manual surface detection, but this process leads to The surface defects of the steel plate produced by the hot straightening machine can only be found after the steel plate is cooled in the subsequent process. The intermediate cooling process is long, and the defects of the steel plate cannot be found in time, which will easily lead to a large number of product accidents.

Method used

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  • A method for inspecting surface defects of thermally straightened steel plates
  • A method for inspecting surface defects of thermally straightened steel plates

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Embodiment 1

[0016] This embodiment provides a method for inspecting surface defects of a thermally straightened steel plate, comprising the following steps:

[0017] (1) After the steel plate passes through the rolling mill, it passes through the laminar flow cooling device and the surface automatic detection device in sequence. The steel plate after laminar flow cooling is initially detected by the surface automatic detection device, and the steel plate after the preliminary detection passes through the coiler and the thermal straightening machine in turn After thermal straightening, the steel plate is cooled on the cooling bed except the tail plate;

[0018] (2) Fall back the cooled steel plate except the tail plate along the opposite direction of the rolling direction, so that the tail plate is located between the surface automatic detection device and the laminar flow cooling device, and fall back to the surface between the surface automatic detection device and the laminar flow coolin...

Embodiment 2

[0022] This embodiment provides a method for inspecting surface defects of a thermally straightened steel plate, comprising the following steps:

[0023] (1) After the steel plate passes through the rolling mill, it passes through the laminar flow cooling device and the surface automatic detection device in sequence. The steel plate after laminar flow cooling is initially detected by the surface automatic detection device, and the steel plate after the preliminary detection passes through the coiler and the thermal straightening machine in turn After thermal straightening, the steel plate is cooled on the cooling bed except the tail plate;

[0024] (2) Fall back the cooled steel plate except the tail plate along the opposite direction of the rolling direction, so that the tail plate is located between the surface automatic detection device and the laminar flow cooling device, and fall back to the surface between the surface automatic detection device and the laminar flow coolin...

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Abstract

The invention discloses a method for checking surface defects of a hot straightened steel plate. The method comprises the following steps that 1, the steel plate sequentially passes through a laminarcooling device and an automatic surface detection device after passing through a rolling mill, the steel plate subjected to laminar cooling is subject to primary detection through the automatic surface detection device, the steel plate subjected to primary detection sequentially passes through a coiling machine and a hot straightening machine, and the steel plate subjected to hot straightening except for a tail plate enters a cooling bed to be cooled; 2, the steel plate subjected to cooling except for the tail plate is backed up in the direction opposite to the rolling direction to enable thetail plate to be positioned between the automatic surface detection device and the laminar cooling device; 3, the steel plate runs in the rolling direction again, when the tail plate passes through the automatic surface detection device, the automatic surface detection device automatically generates a serial number which is different from a common twelve-digit steel plate number, and the serial number is enabled to correspond to an image of the tail plate collected by the automatic surface detection device; and 4, the image is checked manually, and the surface defects of the hot straightened steel plate are judged through indentation indication in the image, and correspond to the corresponding serial numbers.

Description

technical field [0001] The invention relates to the technical field of steel plate defect detection, in particular to an inspection method for surface defects of hot straightened steel plates. Background technique [0002] In the prior art, the rolled steel plate is straightened by a hot leveler after passing through laminar flow cooling, surface automatic detection equipment, downcoiler, and then cooled and followed by manual surface detection, but this process leads to The surface defects of the steel plate produced by the hot straightening machine can only be found after the steel plate is cooled in the subsequent process. The intermediate cooling process is long, and the defects of the steel plate cannot be found in time, which will easily lead to a large number of product accidents. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, and provide a method for inspecting the sur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B38/00B21C51/00G01N21/956
CPCB21B38/00B21C51/00G01N21/956
Inventor 魏林涛张志祥
Owner NANJING IRON & STEEL CO LTD