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Method for preventing coil diameter from being miscalculated

A technology for calculating errors and coil diameters, applied in complex mathematical operations, rolling mill control devices, metal rolling, etc., to increase the chain program and prevent inaccurate calculations.

Active Publication Date: 2020-12-08
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Prevent the strip tail running accident caused by the inaccurate calculation of uncoiling diameter

Method used

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Embodiment Construction

[0027] The invention discloses a method for preventing roll diameter calculation errors. Those skilled in the art can refer to the content of this article and appropriately improve the process parameters to realize it. In particular, it should be pointed out that all similar replacements and modifications are obvious to those skilled in the art, and they are all considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and the relevant personnel can obviously make changes or appropriate changes and combinations to the method and application described herein without departing from the content, spirit and scope of the present invention to realize and Apply the technology of the present invention.

[0028] A method for preventing roll diameter calculation errors, specifically comprising the following steps:

[0029] Step 1: PLC reads the thickness value of the hot-rolled strip in the...

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PUM

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Abstract

The invention relates to the technical field of cold rolling, and in particular relates to a method for preventing coil diameter from being miscalculated. The method comprises the steps of calculatingactual strip steel discharging length (s_LENGTH_RUN) through velocity and time integral, and then grabbing a current coil diameter value (s_POR_DIAM_NOW) at a certain moment; calculating the perimeter of an uncoiler through the current coil diameter value to serve as comparison length (s_LENGTH_COMP); when the length of uncoiled strip steel reaches the comparison length, comparing the coil diameter value (s_POR_DIAM_OLD) grabbed at the last moment with the current coil diameter value (s_POR_DIAM_NOW), and calculating a coil diameter difference value (s_DIAM_CHG); When the (s_DIAM_CHG) value is greater than or equal to the actual thickness value (s_DIAM_CHG_MIN) of strip steel, indicating that the coil diameter is calculated correctly; and otherwise, judging that the coil diameter is miscalculated, setting the uncoiling speed limit to be below 60m / min, and sending out alarm information. According to the method, a strip steel tail running accident caused by inaccurate uncoiled coil diameter calculation is prevented.

Description

technical field [0001] The invention relates to the technical field of cold rolling, in particular to a method for preventing coil diameter calculation errors. Background technique [0002] Cold rolling is generally rolled thin plate or very thin plate, which has high requirements on the surface quality of the steel strip. The raw materials are generally hot-rolled coils imported from other hot-rolling factories. During transportation, especially after a long storage time, the oxidation is relatively serious. Pickling can wash away defects such as iron oxide scale and rust spots on the surface of raw materials, making the surface smooth and clean. First, it can avoid accidents such as broken belt and steel sticking during rolling, and second, it can make the surface of the finished product smooth without black spots and rust, which may cause defective products. [0003] At present, when the Siemens S5-PLC control system controls the pickling discharge process, because the ...

Claims

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Application Information

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IPC IPC(8): B21B37/16G06F17/11G06F17/18
CPCB21B37/16G06F17/11G06F17/18
Inventor 柳军苏宏军张琳侯福君
Owner ANGANG STEEL CO LTD
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