JPH0919748A - Method for preventing meandering of cast strip - Google Patents
Method for preventing meandering of cast stripInfo
- Publication number
- JPH0919748A JPH0919748A JP19406095A JP19406095A JPH0919748A JP H0919748 A JPH0919748 A JP H0919748A JP 19406095 A JP19406095 A JP 19406095A JP 19406095 A JP19406095 A JP 19406095A JP H0919748 A JPH0919748 A JP H0919748A
- Authority
- JP
- Japan
- Prior art keywords
- tension
- meandering
- rolling mill
- thin slab
- cast strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/225—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by hot-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
- B21B39/08—Braking or tensioning arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、冷却ドラムにより
連続鋳造され、続いて圧延機によって圧延される薄鋳片
の蛇行発生を防止する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing the meandering of thin slabs continuously cast by a cooling drum and then rolled by a rolling mill.
【０００２】[0002]
【従来の技術】図１は、冷却ドラムにより連続鋳造され
た薄鋳片を圧延し巻き取る装置の概要を示している。矢
印方向へ回転する一対の冷却ドラム１，１と、冷却ドラ
ム１，１の両端面に押し当てられた一対のサイド堰２，
２とによって形成された湯溜まり部３に溶融金属が供給
される。この溶融金属は、冷却ドラム１，１の周面に凝
固されて板厚１〜１０ｍｍ、幅７００〜１４００ｍｍ程
度の薄鋳片Ｓとなる。2. Description of the Related Art FIG. 1 shows an outline of an apparatus for rolling and winding a thin slab continuously cast by a cooling drum. A pair of cooling drums 1, 1 rotating in the direction of the arrow, and a pair of side dams 2 pressed against both end surfaces of the cooling drums 1, 1.
Molten metal is supplied to the molten metal pool 3 formed by 2 and. The molten metal is solidified on the peripheral surfaces of the cooling drums 1 and 1 to form a thin cast piece S having a plate thickness of 1 to 10 mm and a width of 700 to 1400 mm.
【０００３】この薄鋳片Ｓは下方へ送り出され、回転駆
動されているピンチロール４，４などの搬送装置によっ
て圧延機５に装入されて圧延された後、巻取機６に巻き
取られる。なお、ピンチロール４，４と巻取機５の間に
冷却装置などが設置される場合もある。また、圧延温度
は通常９００〜１３００℃の範囲である。The thin slab S is sent out downward, is charged into a rolling mill 5 by a rotationally driven conveying device such as pinch rolls 4 and 4, is rolled, and then is wound up by a winder 6. . A cooling device or the like may be installed between the pinch rolls 4 and 4 and the winder 5. The rolling temperature is usually in the range of 900 to 1300 ° C.
【０００４】ところで、ピンチロール４や圧延機５を通
過する薄鋳片Ｓが、幅方向での厚みの不均一や、圧延機
５における鋳片幅方向での圧下力の不均一等によって蛇
行すると、薄鋳片Ｓはガイド等（図示しない）に強く衝
突して端部を疵付けたり、蛇行が激しい場合には搬送不
能に至る場合がある。また、巻取機５に巻き取られた薄
鋳片Ｓの端に不揃が生じて次工程での作業に支障が生じ
る。When the thin slab S passing through the pinch roll 4 and the rolling mill 5 meanders due to uneven thickness in the width direction, uneven rolling force in the width direction of the slab in the rolling mill 5, and the like. The thin slab S may collide strongly with a guide or the like (not shown) to scratch the end, or if the meandering is severe, the thin slab S may not be conveyed. In addition, irregularities occur at the ends of the thin slabs S wound by the winder 5, which hinders the operation in the next step.
【０００５】従来、薄鋳片など板材の蛇行修正方法とし
て、冷間圧延における蛇行修正方法が、例えば特開昭５
９−１９１５１０号公報によって知られている。この方
法は、圧延機の入側に蛇行検出器を設置して圧延材の蛇
行量を検出し、検出した蛇行量に応じて作業側・駆動側
のロールギャップを調整する方法である。Conventionally, as a meandering correction method for a plate material such as a thin slab, a meandering correction method in cold rolling has been disclosed in, for example, Japanese Patent Laid-Open No. Sho 5
It is known from JP 9-19510. This method is a method in which a meandering detector is installed on the entrance side of the rolling mill to detect the meandering amount of the rolled material, and the roll gaps on the working side and the driving side are adjusted according to the detected meandering amount.
【０００６】また、帯板の通板における蛇行修正方法
が、例えば特開昭５２−１２０９４２号公報によって知
られている。この方法は、帯板の通板ラインに蛇行検出
器を設置して帯板の蛇行量を検出し、検出した蛇行量に
応じて蛇行調整ロールを出側帯板と略平行な面内で傾斜
させるか、三次元的に傾斜させる方法である。Further, a meandering correction method for passing a strip is known, for example, from Japanese Patent Laid-Open No. 52-120942. In this method, a meandering detector is installed in the band passing line of the band plate to detect the meandering amount of the band plate, and the meandering adjustment roll is inclined in a plane substantially parallel to the output side band plate according to the detected meandering amount. Or, it is a method of inclining three-dimensionally.
【０００７】しかし、このうよな方法を図１に示したピ
ンチロール４，４に適用した場合、蛇行を充分に修正で
きないばかりか、蛇行修正の応答性が悪いために蛇行修
正遅れが生じる。しかも、蛇行の発生を防止する方法で
はないため、前記蛇行による問題を十分には解決できな
い。However, when such a conventional method is applied to the pinch rolls 4 and 4 shown in FIG. 1, not only the meandering cannot be corrected sufficiently, but also the response of the meandering correction is poor, so that a meandering correction delay occurs. Moreover, since it is not a method for preventing the meandering, the problem caused by the meandering cannot be sufficiently solved.
【０００８】一方、蛇行の発生を防止する方法として、
冷間圧延において圧延材の強度と圧延機入、出側におけ
る板の張力差との関係において蛇行発生限界曲線を求
め、この蛇行発生限界曲線以下となるように張力差を設
定する方法が、例えば特開昭６４−４８６１７号公報に
よって知られている。On the other hand, as a method for preventing the occurrence of meandering,
In the cold rolling, the strength of the rolled material and the rolling mill entry, the method of determining the meandering occurrence limit curve in the relationship between the tension difference of the plate on the exit side, the method of setting the tension difference so as to be less than this meandering occurrence limit curve, for example, It is known from JP-A-64-48617.
【０００９】[0009]
【発明が解決しようとする課題】この方法は、冷間圧延
において圧延機入・出側の張力差を約１〜５ｋｇｆ／ｍ
ｍ2 とするものであり、このような大張力で高温の薄鋳
片を搬送すると、薄鋳片は伸び変形して幅反りや幅縮小
が生じる。また薄鋳片に最大１０ｋｇｆ／ｍｍ2程度の
張力を付加するためには、例えばブライドルロール等、
大掛かりな装置を必要とするため、薄鋳片は圧延機に到
達するまでに温度が低下し、適正な温度で圧延ができな
い。そこで本発明は、連続鋳造されて圧延機に送られる
薄鋳片の蛇行を伸び変形等を生じることなく簡単な装置
で防止することを課題とする。According to this method, in the cold rolling, the difference in tension between the inlet side and the outlet side of the rolling mill is about 1 to 5 kgf / m.
It is intended to m 2, when transporting such a large tensile force at a high temperature of the thin slab, thin slab width warp or narrowing occurs by elongation deformation. Further, in order to apply a maximum tension of about 10 kgf / mm 2 to the thin slab, for example, a bridle roll or the like may be used.
Since a large-scale device is required, the temperature of the thin slab decreases by the time it reaches the rolling mill, and it cannot be rolled at an appropriate temperature. Therefore, it is an object of the present invention to prevent the meandering of a thin slab continuously cast and sent to a rolling mill with a simple device without causing stretch deformation or the like.
【００１０】[0010]
【課題を解決するための手段】前記課題を解決する本発
明による蛇行防止方法は、冷却ドラムを用いて連続鋳造
された薄鋳片を圧延機に装入する際に、前記圧延機の前
方における薄鋳片の張力を０．３〜１．５ｋｇｆ／ｍｍ
2 の範囲に調整して圧延機に装入することを特徴とす
る。A meandering prevention method according to the present invention which solves the above-mentioned problems is provided in front of the rolling mill when charging thin cast pieces continuously cast using a cooling drum into the rolling mill. Tension of thin slab is 0.3-1.5kgf / mm
The feature is that it is adjusted to the range of 2 and charged into the rolling mill.
【００１１】[0011]
【作用】図２は、薄鋳片Ｓを圧延機５を介して矢印Ｌ方
向へ送るとき、薄鋳片Ｓが圧延機５においてＷＳ側（作
業側）に僅かに蛇行した時点の状態を示したものであ
る。張力Ｔはライン方向Ｌと平行な方向の力（Ｔ・ｃｏ
ｓθ）と、ライン方向Ｌに垂直な方向の力（Ｔ・ｓｉｎ
θ）に分解される。ライン方向Ｌに垂直な方向の力（Ｔ
・ｓｉｎθ）は、薄鋳片ＳをＤＳ側（駆動側）に戻す、
すなわち蛇行復元力（セルフセンタリング力）として作
用する。FIG. 2 shows a state in which the thin slab S slightly meanders to the WS side (working side) in the rolling mill 5 when the thin slab S is fed in the direction of the arrow L through the rolling mill 5. It is a thing. Tension T is a force (T · co
sθ) and the force (T · sin) in the direction perpendicular to the line direction L.
θ). Force in the direction perpendicular to the line direction L (T
・ Sin θ) returns thin slab S to the DS side (driving side),
That is, it acts as a meandering restoring force (self-centering force).
【００１２】この蛇行復元力（Ｔ・ｓｉｎθ）は、圧延
機前方の張力Ｔの増大に伴って増大する。また実際のラ
イン張力Ｔは、ある変動幅をもっているため瞬間的には
極めて低くなる場合がある。そのときに鋳片に弛みやバ
タツキさらには捩れ等が発生し、これが蛇行を助長する
ことになる。したがって、薄鋳片の蛇行発生を防止する
ためには、圧延機前方のライン張力Ｔを一定値以上に大
きくすることが必要である。This meandering restoring force (T · sin θ) increases with an increase in the tension T in front of the rolling mill. Further, the actual line tension T may be extremely low instantaneously because it has a certain fluctuation range. At that time, slack, flapping, and twisting occur in the slab, which promotes meandering. Therefore, in order to prevent the thin slab from meandering, it is necessary to increase the line tension T in front of the rolling mill to a certain value or more.
【００１３】図３は、冷却ドラムを用いて連続鋳造され
た板厚が１．０〜１０ｍｍ、幅が７００および１４００
ｍｍで、表面温度が９００〜１３００℃の薄鋳片をピン
チロールによって圧延機に送る際に、圧延機前方におけ
る薄鋳片の張力Ｕ（ｋｇｆ／ｍｍ2 ）と鋳片蛇行量の関
係を示している。図において、薄鋳片の張力Ｕが０．３
ｋｇｆ／ｍｍ2 未満であると、鋳片蛇行量が２０ｍｍ程
度を超えて急激に増大し鋳片端部を激しく損傷し、また
圧延機前方において鋳片の弛みやバタツキさらには捩れ
が生じて圧延が不安定になる。FIG. 3 shows a plate continuously cast using a cooling drum, having a plate thickness of 1.0 to 10 mm and widths of 700 and 1400.
The relationship between the tension U (kgf / mm 2 ) of the thin slab in the front of the rolling mill and the meandering amount of the slab when the thin slab with a surface temperature of 900 to 1300 ° C. in mm and being sent to the rolling mill by a pinch roll is shown. ing. In the figure, the tension U of the thin slab is 0.3.
If it is less than kgf / mm 2 , the meandering amount of the slab suddenly increases to more than about 20 mm and the end of the slab is severely damaged, and the slab slack, flapping, and twisting occur in the front of the rolling mill, resulting in rolling. Becomes unstable.
【００１４】一方、薄鋳片の張力Ｕが０．３ｋｇｆ／ｍ
ｍ2 以上であると、望ましくは０．５ｋｇｆ／ｍｍ2 以
上であると、鋳片蛇行量は圧延および巻取り、さらには
巻取り後の次工程において問題とならない２０ｍｍ程度
以下にすることができる。薄鋳片の張力Ｕを１．５ｋｇ
ｆ／ｍｍ2 を超えて大きくしても蛇行防止効果は飽和
し、また薄鋳片は塑性変形によって幅縮小や幅反りが発
生する場合があること、および大張力を付加するための
設備費が嵩み、また薄鋳片が冷却するなどして得策でな
い。このため、上限は１．５ｋｇｆ／ｍｍ2 である。On the other hand, the tension U of the thin cast piece is 0.3 kgf / m.
If it is m 2 or more, preferably 0.5 kgf / mm 2 or more, the meandering amount of the slab can be set to about 20 mm or less, which is not a problem in rolling and winding, and in the next step after winding. . Tension U of thin slab is 1.5kg
Even if it exceeds f / mm 2 , the meandering prevention effect will be saturated, and the thin slab may undergo width reduction and width warp due to plastic deformation, and the equipment cost for applying large tension will increase. It is not a good idea because it is bulky and the thin cast piece cools. Therefore, the upper limit is 1.5 kgf / mm 2 .
【００１５】[0015]
【実施例】以下、本発明の実施例を図面を参照して説明
する。図４は本発明を実施するための装置例を示してい
る。圧延機５の前方に設けられたピンチロール４，４
は、非圧延時のみモーター（図示しない）によって回転
駆動され、圧延時は非駆動であり搬送される薄鋳片Ｓの
摩擦力によって回転される。上下ピンチロール４の軸に
はディスク方式のブレーキ装置７，７が取付けられてい
る。ブレーキ装置７，７はコンプレッサー（図示しな
い）から供給されるエアーによって制動力が調整され
る。Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 shows an example of a device for carrying out the present invention. Pinch rolls 4, 4 provided in front of the rolling mill 5
Is rotatively driven by a motor (not shown) only during non-rolling, and is driven by frictional force of the thin slab S that is not driven during rolling and is conveyed. Disc type brake devices 7, 7 are attached to the shafts of the upper and lower pinch rolls 4. The braking force of the brake devices 7, 7 is adjusted by air supplied from a compressor (not shown).
【００１６】演算制御装置１０では、ライン張力Ｔが
（１）式によって演算される。 Ｔ＝Ｕ×Ｗ×Ｇ ・・・・（１） ここで、Ｔ：ライン張力（ｋｇｆ） Ｕ：薄鋳片の張力（ユニットテンション）（ｋｇｆ／ｍ
ｍ2 ） Ｗ：薄鋳片幅（ｍｍ） Ｇ：薄鋳片厚（ｍｍ）In the arithmetic and control unit 10, the line tension T is calculated by the equation (1). T = U × W × G (1) where T: Line tension (kgf) U: Tension of thin slab (unit tension) (kgf / m
m 2 ) W: Thin slab width (mm) G: Thin slab thickness (mm)
【００１７】また（１）式によって演算されたライン張
力Ｔを用いてブレーキ装置７に供給するエアー圧力Ｐが
（２）式によって演算される。 Ｐ＝（Ｔ−ｂ）／ａ＝（Ｕ×Ｗ×Ｇ−ｂ）／ａ ・・・・（２） ここで、Ｐ：エアー圧力（ｋｇｆ／ｍｍ2 ） Ｔ：ライン張力（ｋｇｆ） Ｕ：薄鋳片の張力（ユニットテンション）（ｋｇｆ／ｍ
ｍ2 ） Ｗ：薄鋳片幅（ｍｍ） Ｇ：薄鋳片厚（ｍｍ） ａ：設備固有の定数 ｂ：設備固有の定数Further, the air pressure P supplied to the brake device 7 is calculated by the equation (2) using the line tension T calculated by the equation (1). P = (T-b) / a = (U × W × G-b) / a (2) where P: air pressure (kgf / mm 2 ) T: line tension (kgf) U: Tension of thin slab (unit tension) (kgf / m
m 2 ) W: Thin slab width (mm) G: Thin slab thickness (mm) a: Equipment-specific constant b: Equipment-specific constant
【００１８】前記（２）式における設備固有の定数ａ，
ｂは、例えば次のように求める。図４において、薄鋳片
Ｓを搬送するときの圧下力でピンチロール４によって挟
み付ける。次にブレーキ装置７，７のエアーシリンダー
（図示しない）にエアーを供給しピンチロール４にブレ
ーキを駆けた状態で薄鋳片Ｓの端を荷重計（図示しな
い）を介して搬送方向へ牽引する。The equipment-specific constant a in the above equation (2),
b is obtained as follows, for example. In FIG. 4, the thin slab S is sandwiched by the pinch rolls 4 by the pressing force when the thin slab S is conveyed. Next, air is supplied to the air cylinders (not shown) of the brake devices 7, 7 and the end of the thin slab S is pulled in the transport direction via a load meter (not shown) while the pinch roll 4 is being braked. .
【００１９】このとき、薄鋳片のサイズ毎で薄鋳片が動
きだすときの荷重を計測する。計測値をプロットして図
５に示すようにエアー圧力Ｐと荷重計の値、すなわちラ
イン張力Ｔの関係を求める。この図の勾配ａと切片ｂか
ら設備固有の定数ａ，ｂを求める。実施例での定数ａ，
ｂは各々２１４，７５２であった。At this time, the load when the thin slab starts to move is measured for each size of the thin slab. The measured values are plotted to determine the relationship between the air pressure P and the load meter value, that is, the line tension T, as shown in FIG. From the slope a and the intercept b in this figure, the constants a and b peculiar to the equipment are obtained. The constant a in the embodiment,
b were 214 and 752, respectively.
【００２０】図４の演算制御装置１０によって演算され
たエアー圧力Ｐの制御信号により、圧力調整弁１１が調
整されることでブレーキ装置７のエアーシリンダー（図
示しない）に供給されるエアー圧力が調整され、ブレー
キ装置７の制動力が調整される。The pressure adjusting valve 11 is adjusted by the control signal of the air pressure P calculated by the arithmetic and control unit 10 of FIG. 4 to adjust the air pressure supplied to the air cylinder (not shown) of the brake unit 7. Then, the braking force of the brake device 7 is adjusted.
【００２１】前記実施例において、鋳造中に薄鋳片の板
厚が変わる場合は、冷却ドラム１の軸に連結されたドラ
ム駆動シリンダー８に接近させて位置検出器９を設け、
位置検出器９によるドラムギャップの信号を薄鋳片厚と
して演算制御装置１０に入力し、（１）式および（２）
式を演算してライン張力Ｔおよびエアー圧力Ｐを補正す
る。In the above embodiment, if the thickness of the thin slab changes during casting, the position detector 9 is provided close to the drum driving cylinder 8 connected to the shaft of the cooling drum 1.
The signal of the drum gap from the position detector 9 is input to the arithmetic and control unit 10 as the thin cast piece thickness, and the equations (1) and (2) are inputted.
An equation is calculated to correct the line tension T and the air pressure P.
【００２２】なお、本発明が適用される薄鋳片は、ステ
ンレス鋼、普通鋼等、その他の鋼にも適用される。ま
た、圧延機前方の薄鋳片に張力を付加する装置としてピ
ンチロールの例を示したが、ピンチロールに代えて例え
ばダンサーロールを設け、ダンサーロールに付加する荷
重を調整してもよい。The thin cast piece to which the present invention is applied is also applied to other steels such as stainless steel and ordinary steel. Further, although an example of a pinch roll is shown as a device for applying tension to the thin cast piece in front of the rolling mill, a dancer roll may be provided instead of the pinch roll and the load applied to the dancer roll may be adjusted.
【００２３】図４に示した装置を用いてＳＵＳ３０４ス
テンレス鋼を薄鋳片に連続鋳造し、鋳造に引き続いて熱
間圧延を行った実施例について説明する。表１に薄鋳片
の寸法、ピンチロール４と圧延機５の間における薄鋳片
の温度、張力および蛇行量を示している。An example in which SUS304 stainless steel is continuously cast into a thin slab using the apparatus shown in FIG. 4 and hot rolling is performed subsequent to the casting will be described. Table 1 shows the dimensions of the thin slab, the temperature, the tension and the amount of meandering of the thin slab between the pinch roll 4 and the rolling mill 5.
【００２４】[0024]
【表１】 [Table 1]
【００２５】本発明例では、圧延機前方における薄鋳片
蛇行量は２０ｍｍ以下であり、蛇行による薄鋳片端部の
疵付きもなく、安定して圧延および搬送することができ
た。これに対して比較例のＮｏ．１１，１５〜１７で
は、薄鋳片の張力Ｕが過大であるため薄鋳片に幅縮小や
幅反りが生じて目的とする形状の薄鋳片を製造できなか
った。In the example of the present invention, the meandering amount of the thin slab in the front of the rolling mill was 20 mm or less, and there was no flaw on the end of the thin slab due to the meandering, and stable rolling and conveyance were possible. On the other hand, in Comparative Example No. In Nos. 11 and 15 to 17, the tension U of the thin slab was excessive, so that the thin slab was reduced in width and warped, and the thin slab having a desired shape could not be manufactured.
【００２６】また、比較例のＮｏ．１２〜１４，１８で
は、薄鋳片の張力Ｕが過小であるため蛇行が発生し、ガ
イドとの衝突によって両端部に亀裂が発生し、また巻き
取ったコイルに最大７０ｍｍのずれが生じた。Further, in Comparative Example No. In Nos. 12 to 14 and 18, the tension U of the thin slab was too small, so that meandering occurred, cracks occurred at both ends due to collision with the guide, and a deviation of up to 70 mm occurred in the wound coil.
【００２７】[0027]
【発明の効果】本発明によれば、冷却ドラムを用いて連
続鋳造された薄鋳片を圧延機に送る際に、圧延機前方に
おける薄鋳片の張力を適切な範囲に調整することによっ
て薄鋳片の蛇行を防止することができる。この結果、薄
鋳片の蛇行による端部疵付きや亀裂さらには通板不能を
防止し、薄鋳片を安定して圧延し、整然と巻き取ること
ができる。According to the present invention, when a thin slab continuously cast using a cooling drum is fed to a rolling mill, the thin slab in front of the rolling mill is adjusted to an appropriate range by adjusting the tension of the thin slab to an appropriate range. It is possible to prevent the slab from meandering. As a result, it is possible to prevent end flaws and cracks due to meandering of the thin slab, cracks, and impossibility of passing through the thin slab, and to stably roll the thin slab and wind it in an orderly manner.
【図１】双ドラム式連続鋳造装置の概要を示す図FIG. 1 is a diagram showing an outline of a twin-drum type continuous casting device.
【図２】薄鋳片の搬送中における蛇行復元力を説明する
図FIG. 2 is a diagram for explaining a meandering restoring force during the transportation of a thin cast piece.
【図３】圧延機前方における鋳片張力と蛇行量の関係を
示す図FIG. 3 is a diagram showing a relationship between a slab tension and a meandering amount in front of a rolling mill.
【図４】本発明を実施するための制御ブロック図FIG. 4 is a control block diagram for implementing the present invention.
【図５】薄鋳片張力とブレーキ装置に供給するエアー圧
力の関係を示す図FIG. 5 is a diagram showing a relationship between a thin slab tension and an air pressure supplied to a brake device.
１ 冷却ドラム ２ サイド堰 ３ 湯溜まり部 ４ ピンチロール ５ 圧延機 ６ 巻取機 ７ ブレーキ装置 ８ ドラム駆動シリンダー ９ 位置検出器 １０ 演算制御装置 １１ 圧力調整弁 Ｓ 薄鋳片 1 Cooling Drum 2 Side Dam 3 Hot Water Pool 4 Pinch Roll 5 Rolling Machine 6 Winding Machine 7 Brake Device 8 Drum Drive Cylinder 9 Position Detector 10 Arithmetic Control Device 11 Pressure Control Valve S Thin Cast Piece
───────────────────────────────────────────────────── フロントページの続き (72)発明者 桐原 端史 山口県光市大字島田3434番地 新日本製鐵 株式会社光製鐵所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hatsumi Kirihara 3434 Shimada, Hikari City, Yamaguchi Prefecture Shin Nippon Steel Co., Ltd.
Claims (1)
片を圧延機に装入する際に、前記圧延機の前方における
薄鋳片の張力を０．３〜１．５ｋｇｆ／ｍｍ2 の範囲に
調整して圧延機に装入することを特徴とする薄鋳片の蛇
行防止方法。1. When charging a thin slab continuously cast using a cooling drum into a rolling mill, the tension of the thin slab in front of the rolling mill is 0.3 to 1.5 kgf / mm 2 . A method for preventing the meandering of thin slabs, which is adjusted to a range and charged into a rolling mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19406095A JPH0919748A (en) | 1995-07-07 | 1995-07-07 | Method for preventing meandering of cast strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19406095A JPH0919748A (en) | 1995-07-07 | 1995-07-07 | Method for preventing meandering of cast strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0919748A true JPH0919748A (en) | 1997-01-21 |
Family
ID=16318290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19406095A Pending JPH0919748A (en) | 1995-07-07 | 1995-07-07 | Method for preventing meandering of cast strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0919748A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003534915A (en) * | 2000-05-26 | 2003-11-25 | キャストリップ・リミテッド・ライアビリティ・カンパニー | Hot rolling of thin strip |
| JP2017094340A (en) * | 2015-11-18 | 2017-06-01 | 新日鐵住金株式会社 | Thin-walled casting piece manufacturing apparatus and pinch roll leveling method |
| JP2018061999A (en) * | 2016-10-14 | 2018-04-19 | 新日鐵住金株式会社 | Pre-rolling pinch roll device and pre-rolling pinch roll method |
-
1995
- 1995-07-07 JP JP19406095A patent/JPH0919748A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003534915A (en) * | 2000-05-26 | 2003-11-25 | キャストリップ・リミテッド・ライアビリティ・カンパニー | Hot rolling of thin strip |
| EP1289685A4 (en) * | 2000-05-26 | 2006-05-31 | Castrip Llc | Hot rolling thin strip |
| US7093342B2 (en) | 2000-05-26 | 2006-08-22 | Castrip Llc | Hot rolling thin strip |
| JP2017094340A (en) * | 2015-11-18 | 2017-06-01 | 新日鐵住金株式会社 | Thin-walled casting piece manufacturing apparatus and pinch roll leveling method |
| JP2018061999A (en) * | 2016-10-14 | 2018-04-19 | 新日鐵住金株式会社 | Pre-rolling pinch roll device and pre-rolling pinch roll method |
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