JPH0478361B2 - - Google Patents
Info
- Publication number
- JPH0478361B2 JPH0478361B2 JP58074945A JP7494583A JPH0478361B2 JP H0478361 B2 JPH0478361 B2 JP H0478361B2 JP 58074945 A JP58074945 A JP 58074945A JP 7494583 A JP7494583 A JP 7494583A JP H0478361 B2 JPH0478361 B2 JP H0478361B2
- Authority
- JP
- Japan
- Prior art keywords
- strip
- roll
- rolling
- crown
- mill
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 description 20
- 238000010586 diagram Methods 0.000 description 4
- 238000003801 milling Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
- B21B37/34—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by hydraulic expansion of the rolls
-
- 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
- B21B1/30—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 in a non-continuous process
- B21B1/32—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 in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
- B21B1/34—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 in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/22—Pass schedule
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2269/00—Roll bending or shifting
- B21B2269/02—Roll bending; vertical bending of rolls
- B21B2269/04—Work roll bending
-
- 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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/38—Control of flatness or profile during rolling of strip, sheets or plates using roll bending
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Control Of Metal Rolling (AREA)
Description
【発明の詳細な説明】
本発明は、ステツケルミルにおけるストリツプ
のクラウン制御方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling the crown of a strip in a Steckel mill.
ステツケルミルは４重式でミルの両側にコイラ
フアーネスを備え、正逆の運転を繰り返して仕上
圧延を行うものである。ステツケルミルでの圧延
は通常５〜９パスが行われる。 The Stetskell mill is a four-layer type, equipped with coiler furnaces on both sides of the mill, and performs finish rolling by repeating forward and reverse operations. Rolling in a Steckel mill typically takes 5 to 9 passes.
従来のステツケルミルの圧延においてはワーク
ロールクラウンを、各パス毎に変化させることが
できないため、全パス同一のクラウンで圧延を行
う必要がある。各パスの圧延条件は大きなストリ
ツプのクラウン変化を生じさせない範囲で抑える
必要があり、ミルの能力を十分に発揮させた圧延
が困難であり、ストリツプのクラウン制御も不可
能であつた。 In rolling with a conventional Steckel mill, the work roll crown cannot be changed for each pass, so it is necessary to perform rolling with the same crown for all passes. The rolling conditions for each pass must be kept within a range that does not cause large changes in the crown of the strip, making it difficult to perform rolling that takes full advantage of the mill's capabilities and making it impossible to control the crown of the strip.
一方コイラフアーネスはストリツプ巻取中の温
度降下を防ぐための設備であり、ストリツプは圧
延中に耳部が800〜1150℃の炉温で保熱されるた
め、良好なエツジのものを得ることができる。し
かしコイラフアーネスは積極的にストリツプのク
ラウン制御に寄与するものではない。 On the other hand, a coiler furnace is a device to prevent a drop in temperature during strip winding, and since the edges of the strip are kept at a furnace temperature of 800 to 1150°C during rolling, good edges can be obtained. However, the coiler furnace does not actively contribute to controlling the crown of the strip.
それ故本発明の目的は、ワークロールクラウン
のたわみ量により制約を受けていた圧下率の範囲
を広げ、ミル能力を十分に発揮させた強圧下を行
い、かつ従来より優れたストリツプのクラウン形
状を得ることができるステツケルミルにおけるス
トリツプのクラウン制御方法を提供することにあ
る。 Therefore, the purpose of the present invention is to widen the range of rolling reduction, which was limited by the amount of deflection of the work roll crown, to perform strong rolling that fully utilizes the milling ability, and to create a strip crown shape that is superior to the conventional one. An object of the present invention is to provide a method for controlling the crown of a strip in a Steckel mill.
以下添付の図面を参照して本発明の好ましい実
施例について説明する。 Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図はストリツプの形状限度およびミル能力
限度とストリツプ厚との関係を示した図である。
第１図中に示された３つの線は、圧延荷重Ｐが
Ａ、ＢおよびＣの場合についてのストリツプクラ
ウン変化率（％）とストリツプ厚（mm）との関係
を示したものである。Ａ、Ｂ、Ｃの値の大きさ
は、Ａ＞Ｂ＞Ｃの順であり、Ａはミル能力の最大
値に相当する。Ｐ＝Ａのときストリツプ厚がａ以
上ではミル能力限度となり、ストリツプ厚がａと
ｂとの間の範囲ではストリツプの形状限度とな
る。 FIG. 1 is a diagram showing the relationship between strip shape limits, mill capacity limits, and strip thickness.
The three lines shown in Fig. 1 show the relationship between the strip crown change rate (%) and the strip thickness (mm) when the rolling loads P are A, B, and C. . The values of A, B, and C are in the order of A>B>C, and A corresponds to the maximum mill capacity. When P=A, if the strip thickness is greater than a, the milling capacity will be limited, and if the strip thickness is between a and b, the strip shape will be limited.
ストリツプクラウン変化率は同一の圧延荷重の
場合、ストリツプ厚が薄い程大きくなる。ストリ
ツプクラウン変化率が大きくなるとストリツプ形
状の変化が大きくなり圧延不可能となる。 For the same rolling load, the strip crown change rate increases as the strip thickness becomes thinner. When the strip crown change rate becomes large, the change in strip shape becomes large and rolling becomes impossible.
従つて一般にワークロールクラウンを変えずに
圧延を繰り返す場合、ストリツプクラウン変化率
を例えば４％以下に抑えた範囲内で圧延荷重を選
定するため、ストリツプ厚が薄くなるとミル能力
を十分に発揮した強圧下が不可能となつてしま
う。 Therefore, in general, when rolling is repeated without changing the work roll crown, the rolling load is selected within a range that suppresses the strip crown change rate to, for example, 4% or less, so as the strip thickness becomes thinner, the milling capacity is fully utilized. It becomes impossible to apply such strong pressure.
第２図は本発明の方法を実施するための機構を
概略的に示したものである。ステツケルミル１は
ワークロール２、バツクアツプロール３を有し、
ミル１の両側にはコイラフアーネス４を備えてい
る。コイラフアーネス４内にはストリツプ巻取用
のリール５が内臓されている。 FIG. 2 schematically shows a mechanism for carrying out the method of the invention. The Stetskell mill 1 has a work roll 2, a backup roll 3,
Coiler furnaces 4 are provided on both sides of the mill 1. A reel 5 for winding the strip is built into the coiler furnace 4.
本発明においてはバツクアツプロール３をVC
ロールとする。ストリツプ厚、ストリツプ温度、
コイラフアーネス温度、ワークロールベンダー圧
力、VCロール圧力、圧延荷重その他の圧延速度、
材料成分、ロールギヤツプ等の圧延条件は専用の
CPUに入力される。このCPUにおいて、最適な
パススケジユールおよびそれに必要なVCロール
圧力、ワークロールベンダー圧力、コイラフアー
ネス温度を予想計算する。この計算結果に基づき
圧延の際にVCロール圧力とワークロールベンダ
ー圧力を自動的に制御し、所望のストリツプクラ
ウン形状を得る。 In the present invention, backup roll 3 is used as VC
Roll. strip thickness, strip temperature,
Coiler furnace temperature, work roll bender pressure, VC roll pressure, rolling load and other rolling speeds,
Rolling conditions such as material composition and roll gap are determined by special
Input to CPU. This CPU predicts and calculates the optimal pass schedule and the necessary VC roll pressure, work roll bender pressure, and coiler furnace temperature. Based on this calculation result, the VC roll pressure and work roll bender pressure are automatically controlled during rolling to obtain the desired strip crown shape.
VCロール圧力を調整することによつてストリ
ツプ厚に係わらず最大荷重においてもストリツプ
クラウン変化率を一定値以下に抑えることができ
る。ちなみに第３図はＰ＝Ａの場合におけるVC
ロール圧力による調整可能範囲を示したものであ
る。 By adjusting the VC roll pressure, the strip crown change rate can be kept below a certain value, regardless of the strip thickness and even under maximum load. By the way, Figure 3 shows VC in the case of P=A.
This shows the adjustable range depending on the roll pressure.
以下に本発明の方法によつて達成される効果に
ついて説明する。 The effects achieved by the method of the present invention will be explained below.
ステツケルミルの場合同一のロールフラウンで
何パスも圧延を行うのであるが、ストリツプ形状
変化を一定量以内に抑える必要があるため、スト
リツプ厚が薄くなる仕上パスでは同一の圧延荷重
においてもストリツプ形状の変化が大きいのでミ
ル能力を十分に発揮させた強圧下が不可能であつ
た。 In the case of a Steckel mill, rolling is performed over many passes with the same roll flange, but it is necessary to suppress changes in the strip shape within a certain amount, so in the finishing pass where the strip thickness becomes thinner, the strip shape changes even under the same rolling load. Due to its large size, it was impossible to apply strong pressure to fully utilize the milling capacity.
本発明においては、ロールのたわみをVCロー
ル圧力で調整するとともにストリツプ加熱温度を
とり込むことによつて、ストリツプの変形抵抗の
予測即ち荷重によるワークロールのたわみひいて
はそれによつて生ずる形状不良を修正するのに最
適なVCロール圧力の予測計算が可能になつた。 In the present invention, by adjusting the deflection of the roll using the VC roll pressure and taking into account the strip heating temperature, it is possible to predict the deformation resistance of the strip, that is, to correct the deflection of the work roll due to the load and the defective shape caused thereby. It is now possible to predict and calculate the optimal VC roll pressure.
このようにコイラフアーネスの温度を取り込ん
だ上でワークロールのたわみを計算し、それを修
正するのに必要なVCロール圧力を出力すること
によつて、仕上げパスでも大きな荷重をかけ強圧
下することが可能になり、従来に比べて20％パス
回数を減少させることができた。 In this way, by taking in the temperature of the coiler furnace, calculating the deflection of the work roll, and outputting the VC roll pressure necessary to correct it, it is possible to apply a large load and press down even during the finishing pass. This enabled us to reduce the number of passes by 20% compared to before.
第１図は、ストリツプクラウン変化率とストリ
ツプ厚との関係を示した図、第２図は、本発明の
方法を実施するための機構を概略的に示した図、
第３図は、Ｐ＝Ａの場合におけるVCロール圧力
による調整可能範囲を示した図である。
（主な参照番号）、１……ステツケルミル、２
……ワークロール、３……バツクアツプロール、
４……コイラフアーネス、５……リール。
FIG. 1 is a diagram showing the relationship between strip crown change rate and strip thickness; FIG. 2 is a diagram schematically showing a mechanism for carrying out the method of the present invention;
FIG. 3 is a diagram showing the adjustable range by the VC roll pressure in the case of P=A. (main reference number), 1...Stetskelmil, 2
...Work roll, 3... Backup roll,
4... Coil Furness, 5... Reel.
Claims (1)
有するステツケルミのバツクアツプロールとして
VCロールを設置し、前記コイラフアーネスの温
度および前記VCロールの内圧を制御することに
よりストリツプのクラウン形状制御をおこなうこ
とを特徴とする、ステツケルミルにおけるストリ
ツプのクラウン制御方法。1. As a back-up roll of Stetskelmi with coiler furnaces on the inlet and outlet sides of the mill.
A method for controlling the crown of a strip in a Steckel mill, characterized in that the crown shape of the strip is controlled by installing a VC roll and controlling the temperature of the coiler furnace and the internal pressure of the VC roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58074945A JPS59202110A (en) | 1983-04-30 | 1983-04-30 | Control method of crown in steckel mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58074945A JPS59202110A (en) | 1983-04-30 | 1983-04-30 | Control method of crown in steckel mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59202110A JPS59202110A (en) | 1984-11-15 |
| JPH0478361B2 true JPH0478361B2 (en) | 1992-12-11 |
Family
ID=13561973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58074945A Granted JPS59202110A (en) | 1983-04-30 | 1983-04-30 | Control method of crown in steckel mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59202110A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111957751B (en) * | 2020-07-10 | 2022-04-08 | 北京科技大学设计研究院有限公司 | Method for controlling head and tail thinning wedge in reversible rolling process of steckel mill |
-
1983
- 1983-04-30 JP JP58074945A patent/JPS59202110A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59202110A (en) | 1984-11-15 |
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