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Method for judging thickness abnormality of thickness tester and hot-rolled plate during hot rolling production

A technology of thickness gauge and hot-rolled plate, which is applied in the direction of length measuring device, metal rolling, metal rolling, etc.

Inactive Publication Date: 2011-06-29
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the thickness gauge fails or other reasons lead to measurement distortion (that is, when the thickness value measured by the thickness gauge is inconsistent with the actual thickness of the strip), how does the quality inspector correctly judge whether the thickness of the thickness gauge and the hot-rolled strip are abnormal? Haven't seen any public reports about

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  • Method for judging thickness abnormality of thickness tester and hot-rolled plate during hot rolling production
  • Method for judging thickness abnormality of thickness tester and hot-rolled plate during hot rolling production

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Embodiment

[0025] The method for judging thickness gauge and hot-rolled sheet thickness abnormality in the hot-rolled production of present embodiment, as figure 1 As shown, the present embodiment takes the strip steel with a thickness target value of 3.0mm as an example, including the following steps:

[0026] 1) Firstly, the measured thickness and calculated thickness of the historical normal thickness steel coils stored in the existing process control system (L2 system) are retrieved, the deviation value of the statistically measured thickness and the calculated thickness is calculated, and the standard thickness deviation range is formulated. This implementation The number of steel coils in the example is 200 coils.

[0027] Measuring Thickness Yes - Thickness gauges on rolling lines measure and send and store thickness data in process control systems.

[0028] Calculation of thickness is--the existing thickness AGC feedforward system of the rolling line collects the measurement dat...

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Abstract

The invention relates to a method for judging the thickness abnormality of a thickness tester and a hot-rolled plate during hot rolling production, belonging to the technical field of measuring and judging the thickness of a hot-rolled plate. The method comprises the following steps: firstly selecting the measuring thickness and computing thickness of the hot rolled coil with the normal thickness in the existing process control system, and computing the difference between the measuring thickness and the computing thickness so as to work out the standard thickness deviation range; in the real-time rolling process, computing the real-time measuring thickness and the real-time computing thickness by utilizing the process control system so as to obtain the real-time thickness deviation; comparing the real-time thickness deviation with the standard thickness deviation range, if the real-time thickness deviation exceeds the standard thickness deviation range, judging that the thickness tester is false; and otherwise, directly comparing the real-time measuring thickness with the target thickness. In the invention, the thickness tester is provided with an early warning mechanism so that the quality accident or unnecessary loss caused by the careless of detectors due to the distortion of the thickness tester is avoided. The invention also provides an audio-visual, simple, safe and convenient novel method for judging the thickness of a hot-rolled plate in an on-line manner.

Description

technical field [0001] The invention relates to a method for judging whether a thickness gauge for hot-rolling production and whether the thickness of a hot-rolled plate is abnormal, and belongs to the technical field of hot-rolled plate thickness measurement and judging methods. Background technique [0002] The thickness of hot-rolled strips (such as steel strips) has always been an important indicator of the quality of hot-rolled strips. At present, hot rolling mills are generally equipped with thickness gauges at the exit of the finishing stand, and quality inspection personnel judge whether the thickness of the hot-rolled strip meets the thickness target requirements based on the continuous measured thickness curve displayed on the thickness gauge. For hot-rolled strip products whose deviation between the actual measured thickness and the thickness target value displayed by the thickness gauge exceeds the product tolerance range, it is necessary to manually measure the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B38/04
Inventor 卞皓高映王宁宁
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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