SU869888A1

SU869888A1 - Method of adjusting interroll gap at rolling sheets in banded rolls

Info

Publication number: SU869888A1
Application number: SU792855043A
Authority: SU
Inventors: Валентин Митрофанович Клименко; Евгений Николаевич Никитенко; Вадим Семенович Горелик; Валентин Николаевич Зинин
Original assignee: Донецкий Ордена Трудового Красного Знамени Политехнический Институт
Priority date: 1979-12-19
Filing date: 1979-12-19
Publication date: 1981-10-07

Description

. I . . . I. .

Изобрете1ше относитс к прокатному производству и может быть .использованопри точной прокатке листов и полос .The invention relates to rolling production and may be used in the accurate rolling of sheets and strips.

Известен способ регулировани меж вапкового зазора при прокатке листов в бандг жированных валках, включакиций вращение бандажа относительно неподвижной оси, зазор между которыми заполн ют рабочей едкостью под давлением D3 ., There is a known method for adjusting between the vap gap when rolling sheets in banding rolls, including rotation of the tire relative to the fixed axis, the gap between which is filled with the working fluid under pressure D3.,

Недостатком этого способа вл етс низка точность прокатки, так как радиальное перемещение бандажа ограничено величиной упругой деформации бандажа.The disadvantage of this method is low rolling accuracy, since the radial movement of the band is limited by the amount of elastic deformation of the band.

Наиболее близким по технической сущности к предлагаемому изобретению вл етс способ регулировани межвалкового зазора при прокатке листов в бандажированнных валках, включающий независимое вращение оси и бандажа, зазор между которыми заполн ют рабочей жидкостью под давлением 2}.The closest to the technical essence of the present invention is a method of adjusting the roll gap when rolling sheets in the bandaged rolls, including independent rotation of the axis and the bandage, the gap between which is filled with working fluid under pressure 2}.

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Однако рациональное перамешение бандажа ограничено его упругой деформацией .However, a rational permutation of the bandage is limited by its elastic deformation.

Целью изобретени вл етс получение равномерной толщины листа путем регулировани радаапьного перемещени бандажа относительно оси валка.The aim of the invention is to obtain a uniform sheet thickness by adjusting the radial movement of the band relative to the roll axis.

Поставленна цель достигаетс тем, что в способе, включающем независимое вращение оси и бандажа, зазор The goal is achieved by the fact that in the method, which includes an independent rotation of the axis and band, the gap

to между которыми заполн ют рабочей жидкостью под давлением, оси валка -сооб4ают переменную угловую скорость в функции толщины листа.В зоне действи на валок усили between which is filled with a working fluid under pressure, the axes of the roll -soob4 vary the angular velocity as a function of the thickness of the sheet.

15 прокатки вследствие гидродинамического зффекта образуетс масл ный клин, толщина которого зависит от относительной скорости вращени оси и бандажа .15, due to the hydrodynamic effect, an oil wedge is formed, the thickness of which depends on the relative speed of rotation of the axis and the bandage.

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Claims

The rotational speed of the roll axis, affects the amount of radial movement of the tire, referring to the flax of the roll axis and, thus, the amount of the roll gap and the thickness of the rolled strip. Fig k 1 depicts a vertical quarto knot; in fig. 2 —a section AA in FIG. I. Valkrvy node contains a bandage 1, free standing on the axis 2 with a gap. The cavity between the axis and the bandage of the roll is limited by ectures 4. Axis 2 has a drive 5. Work roll 6 having a shaft 7 is supported on the support roller. In the rolls there is a rolled strip 8. When rolling, the drive 7 rotates the work roll b and band I with the rolling speed, and the drive 5 waxes the OS 2 with a speed greater than the rolling speed. Since the rotational speeds, the axis 2 and the band 1 are different, a relative speed of rotation of the band about the axis 2 arises. In this case, the hydromyamymic effect takes place, which means that the liquid is sucked into the contract zone of axis 2 and band 1, where an oil wedge of a certain thickness, depending on the spinning speed of the waxing of axis 2 and band 1. With an increase in the thickness of the strip 8. The speed of waxing of axis 2 is increased by means of actuator 5, the relative speed of axis 2 relative to band I and the thickness of the oil wedge in the gap 3 are increased. The band 1 is displaced in the radial direction relative to the axis 2 and additionally, through the work roll b compresses the strip 8, bringing its thickness to the given one. When the thickness of strip 8 is reduced, the process is similar with the only difference. that the rotation speed of axis 2 is reduced. When the relative speed of the axis changes from 0 to 10 m / s, the oadial movement of the bandage reaches 0.2OD mm. The interlocking gap changes by the same amount, which makes it possible to correct thickness deviations of the order of 0, 2 mm. The application of the proposed method on broadband mills will reduce the field of deviations of the thickness of the bands by 20-30%. Claims The method of adjusting the roll gap when rolling sheets in shrouded rolls, includes independent rotation of the axis and bandage, the gap between which is filled with working fluid under pressure, characterized in that, from the goal of obtaining a uniform sheet thickness by adjusting the radial movement of the band relative to the base of the roll, The primary rolls report the variable angular velocity as a function of sheet thickness. . Information sources, information received by IN at examination 1.:Patent of England No. 1118588, cl. VZM, 1971.

2. The patent of Japan 53-99060, cl. 12 C 211.3, 1978 (prototype):