JP2006263779A - Side guide control method for hot rolling apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side guide control method for a hot rolling apparatus capable of preventing the occurrence of flaws or broken surfaces of an end in the width direction of a steel. <P>SOLUTION: The side guide control method for the hot rolling apparatus comprises preventing meandering of steel by a side guide installed immediately before a pinch roll installed immediately before coiling a finish-rolled steel. The method is characterized in that the meandering quantity of the steel is obtained by difference in opening or difference in load between the drive side and the counter-drive side of the pinch roll, and the opening of the side guide is corrected based on the meandering quantity. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a side guide control method for a hot rolling facility that controls a side guide installed immediately before the winding device of the hot rolling facility.

  In a hot rolling facility, the steel material bends and meanders in the width direction of the steel material, and the steel material that has come out contacts the side guide installed just before the winding device. The problem was the wrinkles and breakage of the club. As this prevention technique, there exists a technique currently disclosed by patent document 1, for example. In this technique, the load received by the side guide due to meandering or bending of the steel material is monitored, and the side guide is released as the load increases.

Moreover, there exists a technique currently disclosed by patent document 2 as a technique to reduce the amount of meandering of steel materials. This technology is based on the amount of pinch roll leveling or the finish rolling mill based on the meandering amount of steel detected by a width meter installed upstream of the side guide or a meandering detector installed on the finishing mill exit. The leveling amount is controlled so as to reduce the meandering amount of the steel material.
JP-A-6-262260 JP 2004-290990 A

  However, in the technique disclosed in Patent Document 1, although the side guide is opened as the load increases, the side guide and the steel material are already in contact with each other at the time of opening, so there is no wrinkling or bending at the end in the width direction. There is a problem that can not be.

  Further, the technique disclosed in Patent Document 2 has a problem that it is impossible to detect and control meandering caused by a pinch roll or a winder.

  This invention is made | formed in view of the said situation, provides the side guide control method of the hot rolling equipment which can solve the said subject and can prevent generation | occurrence | production of the wrinkles and a crease | fold of a steel-material width direction edge part. For the purpose.

  The invention according to claim 1 of the present invention is a side guide control method for a hot rolling facility in which meandering of the steel material is prevented by a side guide installed just before a pinch roll installed just before winding the finish-rolled steel material. The hot rolling is characterized in that the meandering amount of the steel material is obtained from the opening difference or load difference between the driving side and the non-driving side of the pinch roll, and the opening degree of the side guide is corrected based on the meandering amount. This is a side guide control method for equipment.

  According to the present invention, the opening degree of the side guide is corrected based on the meandering amount of the steel obtained from the opening degree difference or the load difference between the driving side and the non-driving side of the pinch roll installed immediately downstream of the side guide. As a result, it becomes possible to detect meandering caused by pinch rolls and winders that cannot be detected by the meandering detector installed on the exit side of the finishing rolling mill and the width gauge upstream of the side guide. By sequentially correcting the opening degree of the side guide, it is possible to prevent an increase in the pressing force of the side guide in advance, and thus it is possible to prevent the occurrence of wrinkles and breakage of the steel material width direction end.

  The best mode for carrying out the present invention will be described below with reference to the drawings. Drawing 2 is a figure showing an example of equipment arrangement of hot rolling equipment. In the figure, 1 is a winder, 2 is a pinch roll, 3 is a side guide, 4 is a width meter, 5 is a steel material, 6 is a meander detector, and 7 is a finishing mill group.

  The steel material 5 finish-rolled by the finish rolling mill group 7 is centered by the side guide 3, restrained by the pinch roll 2, wound by the winder 1, and becomes coiled. At this time, the pinch roll 2 is leveled by a method of correcting the opening degree of the side guide 3 by the meandering amount detected by the width meter 4 or by the meandering amount detected by the meandering detector 6 installed after the finishing mill group 7. A method of adjusting is conventionally performed. In the present invention, the amount of meandering is obtained without using the width meter 4 and the meandering detector 6, and the opening degree of the side guide 3 is corrected.

  FIG. 1 is an example of a system configuration diagram of the present invention. In the figure, 2, 3 and 5 are the same as in FIG. 1, 8 is an electric motor for driving a pinch roll, 9 is a driving side opening detector or load detector, and 10 is a counter driving side opening detector or load detector. , 11 is an opening degree setter, 12 is a meandering amount calculator, 13 is a position controller, 14 is a driving side cylinder, 15 is a counter driving side cylinder, and 16 is an opening degree corrector.

  Near the upstream side of the pinch roll 2, a side guide 3 for the purpose of centering the steel material 5 is installed. This side guide 3 usually has a parallel guide portion that guides both sides of the steel material 5, and a parallel guide portion. The inlet guide portion is connected to the entrance side with a predetermined opening angle. In this way, the side guide 3 adjusts the winding shape such as introduction of the steel material 5 into the winder and edge alignment of the steel material 5.

  The pinch roll 2 is provided with a driving pinch roll driving motor 8, and the installation side is called the driving side and the opposite side is called the non-driving side, and the driving side opening detector or load detector 9 and the counter driving are respectively set. A side opening detector or a load detector 10 detector is installed. The opening degree detector here detects a gap between the upper and lower pinch rolls.

  In the meandering amount calculator 12, first, the opening degree difference or load difference in the width direction of the pinch roll 2 is detected by the driving side opening degree detector or load detector 9 and the counter driving side opening degree detector or load detector 10. Then, the meandering amount is calculated from the result obtained from each opening degree or load.

  The opening degree corrector 16 calculates a correction amount corresponding to the meandering amount obtained by the meandering amount calculator 12 with respect to the set value from the opening degree setter 11, and outputs a command to the position controller 13. The position controller 13 operates the driving side cylinder 14 or the counter driving side cylinder 15 in accordance with the command. In addition, in order to suppress that the steel material 5 wound up becomes a telescope structure by opening the side guide 3 too much, it is preferable to provide a limit value for the output from the opening degree corrector 16.

It is an example of the system block diagram of this invention. It is a figure which shows an example of the equipment layout of a hot rolling facility.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Winding machine 2 Pinch roll 3 Side guide 4 Width meter 5 Steel material 6 Meander detector 7 Finishing rolling mill group 8 Pinch roll drive motor 9 Drive side opening detector or load detector 10 Non-driving side opening detector or Load detector 11 Opening setter 12 Meander amount calculator 13 Position controller 14 Driving side cylinder 15 Counter driving side cylinder 16 Opening degree corrector

Claims (1)

In the side guide control method of the hot rolling equipment for preventing meandering of the steel material by the side guide installed just before the pinch roll installed just before winding the steel material that has been finish-rolled,
A hot rolling facility characterized in that a meandering amount of the steel material is obtained from an opening difference or a load difference between the driving side and the non-driving side of the pinch roll, and the opening degree of the side guide is corrected based on the meandering amount. Side guide control method.

Images