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Continuous grinding method and continuous grinding production line for metal strip

A metal belt and production line technology, which is applied to the parts of grinding machine tools, abrasive belt grinders, metal processing equipment, etc., can solve the problems of fire accidents in grinding racks, increased load, and reduced productivity, and achieve the goal of preventing fire accidents Effect

Active Publication Date: 2019-06-07
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] However, when the above-mentioned plate cracks and tail breakages occur, a fire accident may occur in the grinding rack row between the time when the operator hears the abnormal sound and the grinding operation is manually stopped by operating the operation panel.
[0023] Originally, in the existing continuous grinding production line, there is a danger of a fire accident caused by the smoke and dust of the grinding oil being ignited due to local abnormal heat generated during the grinding operation. Fire extinguishing equipment that blows fire extinguishing agents such as carbon dioxide
Therefore, even if a fire accident occurs, there is a system that can immediately extinguish the fire. However, when a plate crack or tail breakage occurs and causes a fire accident, cleaning, inspection, and further maintenance of equipment components will be more difficult than when the fire accident is not caused. The load of recovery work such as replacement has increased significantly, and productivity has further decreased significantly

Method used

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  • Continuous grinding method and continuous grinding production line for metal strip
  • Continuous grinding method and continuous grinding production line for metal strip
  • Continuous grinding method and continuous grinding production line for metal strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] About 10,000 to 20,000 tons of ferritic stainless steel hot-rolled steel strips with a plate thickness of 1.5-13mm and a plate width of 700-1600mm per year Figure 6 In the continuous grinding production line of the company, the plate passing is carried out. In the past when the grinding operation was performed, the fire accidents associated with the occurrence of plate passing abnormalities (plate cracks or broken tails) were expressed in numbers relative to the number of times of plate passing abnormalities occurring 10 times. frequency occurs.

[0103] Therefore, according to the present invention, in figure 1 In the illustrated embodiment of the invention, the grinding operation is automatically stopped at the moment the sensor output signal S1 of the light sensor changes from "slab present" to "slab absent" during the grinding operation. As a result, the grinding operation was automatically stopped before the operator noticed the abnormality of the plate passage a...

Embodiment 2

[0105] About 10,000 to 20,000 tons of hot-rolled ferritic stainless steel strips with a plate thickness of 1.5-13 mm and a plate width of 700-1600 mm are used with Figure 6 In the same continuous grinding production line different from Example 1, the plate passing is carried out. In the conventional situation of performing grinding work, the fire accident accompanying the occurrence of abnormal plate passing (plate cracking or broken tail) is relatively abnormal compared with the occurrence of abnormal plate passing. The number of times is 10 and it occurs at a frequency of several times.

[0106] Therefore, according to the present invention, in image 3 In the embodiment of the present invention shown, the threshold value of the POR speed is set to 50% of the POR speed during normal plate passing, and the grinding operation is automatically stopped when the POR speed is lower than the threshold value of the POR speed during the grinding operation . As a result, the grindin...

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Abstract

The present invention addresses the problem of providing a continuous grinding method for a metal strip and a continuous grinding production line for a metal strip, which are useful for preventing anignition accident during grinding work, in particular for preventing an ignition accident associated with a through-plate abnormality (plate cracking, tail breaking). The invention discloses a continuous grinding method for a metal strip. a metal belt is released by the pay-off reel; the direction is changed by an inlet side deflection guide roller; a grinding frame row is used for whole-surface grinding; the outlet side deflection guide roller is used for turning; a tension coiler is used for coiling and recycling; Whether a plate is present or not for detecting the presence or absence of themetal strip is detected. the tachometer is used for detecting the rotating speed of the pay-off reel; At least one of a galvanometer for detecting the drive current of the pay-off reel or the tensioncoiler and a tension meter for detecting the tension of the metal strip is used as an operation sensor, and the occurrence of a through-plate abnormality of the metal strip is detected according to asensor output signal S1 (or S2) of the operation sensor.

Description

technical field [0001] The invention relates to a continuous grinding method for metal strips and a continuous grinding production line for metal strips. In particular, the present invention relates to continuous grinding of metal strips for preventing fire accidents caused by ignition of grinding oil in the operation of grinding the surface of the metal strips with a grinding belt or an elastic grinding wheel while passing the metal strips through a plate Method and continuous grinding line for metal strips. Background technique [0002] Conventionally, metal strips, such as stainless steel strips, have been manufactured through a series of processes such as refining, ingot (billet) casting, hot rolling, annealing, pickling, cold rolling, final annealing, pickling, temper rolling, and finishing. However, for metal strips, such as stainless steel strips, which are stretched long by rolling through these numerous processes and have expanded surface areas, it is a quality iss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B21/12B24B21/00B24B21/18B24B41/00B24B49/00B24B55/00
Inventor 马场幸裕
Owner JFE STEEL CORP
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