JPS58116914A - Method and device for shape control of sheet in multi cluster mill - Google Patents

Abstract

PURPOSE:To freely control a shape of material to be rolled, by supporting work rolls and intermediate rolls of a multi cluster mill by chocks separated respectively, and adding a roll bending function to functions of roll shifting and back up roll crown adjusting. CONSTITUTION:In a multi cluster mill having a back up roll crown adjusting device, a roll shifting device, and a roll bending device; a back up roll crown quantity, roll shifting quantity, and roll bending force, optimum for a target shape of a material to be rolled, are calculated from informations about the quality of the material to be rolled, the width and thickness of sheet, etc. and informations about a rolling load, work roll crown, and others concerning the mill, to set said optimum values to a back up roll crown adjusting device, a roll shifting device, and a roll bending device. While rolling, a shape of material to be rolled is corrected by a shape deviation signal obtained from the difference between a shape detected signal and a set value of target sheet shape.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention a relates to a shape control method of a multi-high rolling mill having cluster rolls, that is, a multi-high cluster rolling mill, and its &*.

Conventional multi-stage cluster rolling mills, as typified by the Sendzimir mill, have a puncture roll, an intermediate roll, and a work roll housed in an integrated housing or an inner and outer grouper song. It is done with luxury. Usually, Crown #! 4. The back-up roll for adjustment is a split roll, which is supported on the shaft via an eccentric sleeve, and the crown '1kv4 is adjusted by adjusting the angle of the eccentric sleeve [1-f].

However, in multi-stage cluster rolling mills such as Sendzimir mills, the plate shape tends to deteriorate due to slight changes in the shape of the rolled material, rolling blades, rolling speed, tension, and other rolling conditions. l! In Liri, the shape correction ability is too weak and the compound elongation cannot be controlled properly, so the shape control ability is not achieved satisfactorily, and there is a strong need for improvement.

In response to these demands, the work rule and intermediate rolls are each supported independently with chocks, and by adding a roll bending function to the roll shift and backup roll crown adjustment functions, the shape control ability is large and high pressure reduction is possible. A multi-stage cluster rolling mill was developed.

An object of the present invention is to provide a suitable shape control method and equipment for a multi-stage cluster rolling mill having the roll bending function, roll shift, and backup roll cradle adjustment function as described above.

In order to achieve this object, the present invention provides a multi-stage cluster rolling mill having a puncture roll crown adjustment device, a roll shift device, and a roll bending device #L, in which the material, width, thickness, and pressure rate of the rolled material are adjusted. Memorize the relationship between the rolling load and the relationship between the rolling load, work roll crown, work o-roll wear f, and back-up roll crown amount, roll shift lid, and roll pending force, and before starting one roll. is based on the information on the rolled material, the predicted rolling load obtained from this information and the above relationship, and information on the rolling mill such as the work roll crown amount and work roll wear profile, and the puncture roll crown amount, The optimum values for the shape of the roll shift lid and roll pending mechanism are calculated and used as 1i-preset values, and during rolling, the detection signal from the shape detector on the exit side of the rolling machine and the set value of the target plate shape are calculated. Based on the shape deviation signal, correction amounts for the amount of puncture-up roll crown, roll shift FjlA, roll pending force, etc. are calculated, and the shape of the plate during rolling is controlled by the correction amounts.

The figure shows an embodiment in which the present invention is applied to a single-stand multi-stage cluster rolling mill. It has a roll pendiff device t3bt-, and further has a roll shift device (not shown).

Furthermore, in the illustrated embodiment, a shape detector 4, which detects the plate shape of the rolling mill roll on the needle side, is used as a detector to measure the work roll temperature. tll
A shape control initial setting calculation device 7 and a shape control online calculation device rt are equipped with a roll thermometer 5 that detects lJ and a load cell 6 that detects rolling load.
S, work roll wear fc2 feel calculation device 119;
Work roll wear profile initial setting device lO1 Rolling time setting device ill, Work roll heat crown calculation device 11i12, Work roll initial mechanical crown setting device 113, Pre#j rolling load calculation device 14, Material, plate width, Plate thickness/rolling wheel setting device 15, target shape setting # device 16 and plate crown setting trowel 1
Equipped with 7.

Factors that affect the plate shape include rolling charge, ei-,
It has been confirmed through machine collection tests that there is work roll crown, insert @ plate crown, and work roll wear amount.
, the relationship between each of these factors and the similar shape [previously stored in the shape control initial setting calculation device 7].

This shape control initial setting calculation device i17 includes il+
The predicted rolling load calculated before the start of rolling by the predicted rolling direction calculation device 14 based on the information on the material, plate width, plate thickness and rolling reduction received from the setting device 1115 according to a predetermined relationship; Work roll heat crown performance X from all detected work rolls! kll
The heat crown amount of the work roll calculated by 12 and (31 Work roll initial mechanical crown setting 1
The work roll wear profile calculation device 9 calculates each time from the initial crown amount of the work roll set in step 3, and the appearance conditions for each rolling obtained from the setting device 15 and the rolling time set in setting *ttt. O work roll wear profile amount; (5) work roll wear profile amount at the start of rolling set in initial setting ve1110; (6) entry side plate cod run setting value set by setting device 17; (7) target shape setting. The target plate shape value set by the device 16 and
Detect the degree and calculate using the heat crown curve or its approximation, and by the fl:! The crown amount of the work roll at the time of IT is estimated. Work roll wear Jk is calculated using the work roll wear curve i1 or its approximate formula t- from the rolling load a and rolling time for each rolling, and the current work roll wear Jl- is calculated from that value. presume.

Then, the shape control initial setting calculation device 7 calculates the predicted pressure abrasive load 1, work roll heat crown position, work roll wear profile cover, and human aS crown amount input thereto based on a pre-stored relationship. The optimum values for the roll crown position, roll shift amount, and roll pending force for the target plate shape are calculated and output as preset values before rolling to the puncture-up roll crown control device 18, roll shift control device 19, and roll bending control device 120, respectively. do. This preset value is revised for each rolling according to the change in roll heat crown depending on the degree of work roll m and the wear amount of the work roll over time.

During rolling for the above grisset, the shape control online calculation device 118 calculates the shape deviation between the detection signal from the shape detector 4 and the set value from the target plate shape setting device 16,
A control signal is fed and dimensioned to a strict shape control operation end divided into shape deviations and 9 turns to control the sheet shape metal.

That is, when the middle elongation or end elongation shape is 0JiII, the correction m of tErrollbenrIngka is calculated, and this value is used as a roll bending correction signal during rolling to be used by the roll bending control system. 1l120 and modify the shape. At this time, if the control limit values of the roll pending devices @3a and 3b are exceeded, the excess amount is used as a correction signal to the puncture-up roll crown control device 18, and the pack-a-ra-l roll crown is controlled to create a cedar-like shape. Complement the correction. On the other hand, in the case of a quarter buckle double wave and one fic1j1 joint extension shape, the shape is corrected by combining the roll pending force correction and the puncture up roll crown correction,
Further, in the case of an unbalanced elongated shape between the work site 1 and the drive side, a correction signal is output to the rolling down f'[Iij control device 1, and the shape is corrected by rolling down from the rolling down W & position 22F. It should be noted that the roll pending control JIICn7/o-ruhen-y1ng control and the intermediate roll bending control JIICn7/o-ruhenging control and the intermediate roll bending control system iN' described here are included, and the roll shift control also includes the work roll shift control and the intermediate roll shift control. However, the optimal control for either one or both of them will be selected based on the conditions and circumstances of each court appearance.

In addition, the shape control initial setting calculation device 7 is inputted with the roll pen f/g correction force and the back unroll crown correction lid during online control, and the learning side based on this is used to determine the fineness of the initial setting performance. Along with Roth 9 Cell 6
The pressure from the #1 detection signal and the detection signal from the shape detector 4 are manually input to achieve the same initial setting performance.

The fC implementation fit mentioned above is an example of a platform in which the present invention is applied to a single-stand double-sided cluster rolling mill, but the present invention can be applied to a one-eyed cluster rolling mill and a dungeon cluster rolling mill consisting of only a few stans V. Needless to say.

As detailed above, according to the present invention, since the optimal setting control of Nl & before rolling a and the online feed pack control during rolling are carried out, not only mid-stretching and end-stretching but also compound stretching, It is possible to effectively control defects in a wide range of shapes, such as a flat, stretched shape or a fist, through all rolling conditions, including sheet passing, butt plate, and acceleration/deceleration.

[Brief explanation of the drawing]

The figure is an explanatory diagram showing one embodiment of the present invention. In the figure, 1 is a multi-stage cluster rolling machine, 2 is a puncture roll crown adjustment device, 3a is a central 10-roll bending device, 3 is a crawl bending device, 4 is a shape detector, 5 is a #-10 roll temperature In total, 6 is a load cell, 7 is a shape control initial setting calculation device, 8 is a shape control online calculation device, 9 is a work roll wear profile calculation device, 12 is a work roll heat crown performance device, and 14 is a predictive rolling cart. Calculation! fit, 15 is a device for setting the material, a-, plate thickness, and rolling reduction rate of the material to be rolled, 16 is an eye II root shape setting device, 17 is an entrance plate crown setting device, 18U back-up roll crown system (2) device, 19
20 is a roll bending control device; 21 is a reduction control device; and 22 is a reduction device.

Claims (1)

[Claims] ill Puncture-up roll crown - In a multi-stage cluster rolling mill having a straightening device, a roll shifting device, and a roll bending device, an intermittent shape is created from information on the material to be rolled and information on the rolling machine before rolling. The optimal backup roll crown amount, roll shift amount, and roll pending force are calculated and set in the backup roll crown adjustment device, roll shift device, and roll bending device. A method for controlling the shape of a multi-stage cluster rolling mill, characterized in that the shape is corrected based on a shape deviation signal between a detection signal from a good shape detector installed in the machine and a shape deviation signal from a set value of the target plate shape. (2) Backup rule crown adjustment! ! Place,
In a multi-stage cluster rolling mill having a s=-le shifting device and a roll bending device, information on the rolling mill, information on the rolling mill, and set values for the target plate shape are input, and the optimal backup roll 9ν amount and roll are calculated for the set values. A shape control initial setting calculation device that calculates the shift amount and roll pending force as preset values before rolling, and a set value of the target plate shape and a detection signal from a shape detector installed on the exit side of the rolling machine are input. A shape control online calculation device that calculates a shape deviation signal and calculates the amount of shape correction during rolling from this shape deviation signal, and the puncture-up roll clawan adjustment device and roll shift according to the output signal of this shape control online calculation device. 1. A cedar-shaped control device for a multi-stage cluster rolling mill, comprising: a device for controlling a roll bending device and a device for controlling a shape modification device for roll bending.