JPH0618654B2 - Automatic width control method - Google Patents

Automatic width control method

Info

Publication number
JPH0618654B2
JPH0618654B2 JP60037109A JP3710985A JPH0618654B2 JP H0618654 B2 JPH0618654 B2 JP H0618654B2 JP 60037109 A JP60037109 A JP 60037109A JP 3710985 A JP3710985 A JP 3710985A JP H0618654 B2 JPH0618654 B2 JP H0618654B2
Authority
JP
Japan
Prior art keywords
width
variation
strip
control method
rolling
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
Application number
JP60037109A
Other languages
Japanese (ja)
Other versions
JPS61195705A (en
Inventor
信夫 福井
正則 西本
正一 西本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP60037109A priority Critical patent/JPH0618654B2/en
Publication of JPS61195705A publication Critical patent/JPS61195705A/en
Publication of JPH0618654B2 publication Critical patent/JPH0618654B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16Control of thickness, width, diameter or other transverse dimensions
    • B21B37/22Lateral spread control; Width control, e.g. by edge rolling

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、竪ロール及び水平ロールを備える圧延スタン
ドによる熱間圧延における自動板幅制御方法に関する。
Description: TECHNICAL FIELD The present invention relates to an automatic strip width control method in hot rolling by a rolling stand provided with vertical rolls and horizontal rolls.

〔従来の技術〕[Conventional technology]

ホットストリップの幅は、需要家あるいは後工程から要
求される板幅に余裕代を加えたものであり、余裕代は歩
留りに影響するので可及的に小さいのが望ましく、この
ためホッストリップの幅変動は極力少なくしなければな
らない。
The width of the hot strip is the width of the board required by the customer or the post-process plus a margin margin. Since the margin margin affects the yield, it is desirable that it be as small as possible. Fluctuations should be minimized.

ホッストリップの幅変動の原因には、圧延前素材(スラ
ブ)の幅及び端面形状、温度及び温度むら、仕上圧延機
における張力などがある。従来行なわれている幅変動減
少方法としては、スラブの幅変動量及び疵手入れ量の許
容値を定め、スキッドマークや焼上げ温度の差に制限を
設け、応答性が良いルーパーの採用およびミル速度制御
の改善等により仕上圧延張力の一定化を図る、等があ
り、最近では積極的に圧延中に竪ロール開度の変更を行
なう。仕上圧延機張力を幅変動に応じて圧延中に変更す
る、ことが考えられている。
The causes of the width variation of the hoslip include the width and end face shape of the raw material (slab) before rolling, temperature and temperature unevenness, and tension in the finishing rolling mill. As a conventional method for reducing the width fluctuation, the allowable values for the width fluctuation of the slab and the amount of flaw maintenance are set, the skid mark and the difference in the baking temperature are limited, and the responsive looper is adopted and the mill speed is set. For example, the finish rolling tension can be made constant by improving the control. Recently, the vertical roll opening is actively changed during rolling. It is considered to change the tension of the finish rolling mill during rolling in accordance with the width variation.

圧延中に竪ロール開度の変更を行なう板幅制御について
は、例えば特開昭54−101744がある。これは竪
ロールの負荷反力と板温を入力情報とし、これをトラッ
キングしてフィードフォワード方式で竪ロールの開度変
更を行ない、板幅変動の減少を図るものであり、竪ロー
ルおよび水平ロールを備える熱間粗圧延機群における上
流の竪ロールの負荷反力と同位置に於ける圧延材料表面
温度を該材料長手方向の各位置について連続的に求め、
それらの値を記憶演算装置にて処理して該材料各位置に
おける負荷反力偏差および温度偏差を求め、それらの偏
差による圧延材料の幅変動を予測し、予測された幅変動
を消去するに必要な下流の1つ以上の竪ロールの開度変
更量を決定し、該材料の圧延時に該各位置に対する竪ロ
ール開度変更量に基き該竪ロールの開度変更を行って、
該材料の長手方向幅変動を除去することを特徴とする。
Regarding the strip width control for changing the vertical roll opening during rolling, there is, for example, JP-A-54-101744. This uses the load reaction force of the vertical rolls and the plate temperature as input information, and tracks this to change the opening of the vertical rolls by a feedforward method to reduce the fluctuation of the plate width. Continuously determine the rolling material surface temperature at the same position as the load reaction force of the upstream vertical rolls in the hot rough rolling mill group equipped with, for each position in the material longitudinal direction,
It is necessary to process those values with a storage computing device to obtain the load reaction force deviation and temperature deviation at each position of the material, predict the width fluctuation of the rolled material due to these deviations, and eliminate the predicted width fluctuation. The amount of change in the opening of one or more vertical rolls downstream, and when changing the opening of the vertical roll based on the amount of change in the vertical roll opening for each position during rolling of the material,
It is characterized in that the variation in width in the longitudinal direction of the material is eliminated.

この既提案方法では板幅変動を竪ロールの負荷反力偏差
及び温度偏差により推定しているが、現在では板幅計を
備える圧延機が多く、この場合幅変動は板幅計で直接測
定すればよい。
In this proposed method, the strip width fluctuation is estimated by the load reaction force deviation and the temperature deviation of the vertical rolls, but at present, many rolling mills are equipped with a strip width gauge.In this case, the width variation can be measured directly by the strip width gauge. Good.

板幅計で幅変動を高精度に測定し、これにより後段圧延
機の竪ロールの開度を調整して幅一定化を行なったとし
ても、この方式ではまだ次のような問題がある。即ち幅
変動が温度むらにより生じたとすると、竪ロールに作用
して幅変動を生じさせた該温度むらは水平ロールに作用
して厚み変動を生じさせるはずで、従って幅変動と厚み
変動は同期して発生する。最終製品になるまでにストリ
ップはAGCにより厚み変動を除かれ、平坦になるが、
この水平ロールによる厚みは変動除去の際幅拡がりが生
じ、幅変動を生じる。従って単純に板幅計で幅測定を行
ない、その測定結果に従って竪ロール開度調整をしただ
けでは幅変動を充分に除去したとは言えない。
Even if the width variation is measured with high precision by the strip width meter and the opening of the vertical roll of the subsequent rolling mill is adjusted to make the width constant, this method still has the following problems. That is, if the width variation is caused by the temperature unevenness, the temperature variation that acts on the vertical roll and causes the width variation should act on the horizontal roll to cause the thickness variation. Therefore, the width variation and the thickness variation are synchronized. Occurs. By the end of the final product, the strip will be flattened by AGC after eliminating thickness fluctuations.
The thickness of the horizontal roll widens when the fluctuation is removed, and the width fluctuates. Therefore, it cannot be said that the width variation is sufficiently removed by simply measuring the width with a plate width meter and adjusting the vertical roll opening according to the measurement result.

本発明はかゝる点に着目するものであっって、一層高精
度な幅変動除去を行なおうとするものである。
The present invention focuses on these points and intends to perform more highly accurate width variation removal.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は、竪ロール及び水平ロールを有する圧延スタン
ドを縦続配置してなる圧延設備における自動板幅制御方
法において、被圧延材の長手方向各点における板幅変動
と板厚変動を検出し、該板厚変動を除いて平坦にしたと
き生じる幅拡がりを該板幅変動に加えて総板幅変動を除
くに必要な竪ロール修正量を求め、各板幅板厚検出点が
後段圧延スタンドの竪ロールに到来するとき、当該検出
点に対する前記修正量により該竪ロールの開度を修正す
ることを特徴とするものである。
The present invention, in the automatic strip width control method in the rolling equipment in which rolling stands having vertical rolls and horizontal rolls are cascaded, the strip width variation and strip thickness variation at each point in the longitudinal direction of the material to be rolled are detected, The width expansion that occurs when flattening except strip thickness variation is added to the strip width variation to obtain the vertical roll correction amount required to eliminate the total strip width variation, and each strip width strip thickness detection point is the vertical strip of the subsequent rolling stand. When it reaches a roll, the opening degree of the vertical roll is corrected by the correction amount for the detection point.

〔実施例〕〔Example〕

第1図は熱間粗圧延設備の一部を示し、10,11は圧
延スタンド1,2はその水平ロール、3,4は竪ロール
である。これらの水平ロール及び竪ロールにより、板厚
圧延および板幅圧延を行なう。5は圧延スタンド10の
出側に設けられた幅検出器で、被圧延材であるフラット
バー6の板幅を連続的に測定する。第5図の曲線C1は
幅検出器5の出力を示す。スキッドマークその他の影響
で、圧延後の材料の長さ方向各位置における板幅は図示
のように変動しているのが普通である。この被圧延材6
の圧延後の板厚を、やはり材料長さ方向の各位置におい
て求めると第6図の曲線C3の如くなり、変動してい
る。板厚は厚み計で実測することにより、あるいは水平
ロール1の圧延荷重と被圧延材温度を用いて算出するこ
とにより求めることができる。板幅変動がスキッドマー
クなどの温度むらにより生じる場合は、図示のように曲
線C1と曲線C3は同期している。即ち板幅が大になる
部位では板厚も大になり、板幅が小になる部位では板厚
も小になる。これは、温度が低く被圧延材の剛性が大で
ある部位では、同じロール間隙の板厚及び板幅圧延では
板厚、板幅が共に大、温度が低い部位ではこの逆になる
ことによる。勿論常にこのように同期している訳ではな
く、例えば走間スケジュール変更で板幅を変え、板厚は
そのまゝとすればこの変更部では両者は非対応となる。
しかしその後は再び曲線C1とC3の如き同期的変化を
する。スキッドマークなどによる板幅変動はAGCによ
り除去され、フラットになる。この際、板厚が大なる部
分では幅拡がりが生じる。厚み変動とそれを除いたとき
生じる幅変動とは第7図の如き関係にある。この幅拡が
りを考慮すると、実質的には板幅は第5図の点線曲線C
2の如くであった、とするのが正しい。こゝでC2はC
1に、厚み変動除去の際の幅拡がり量を加えたものであ
る。
FIG. 1 shows a part of the hot rough rolling equipment, 10 and 11 are rolling stands 1, 2 are horizontal rolls thereof, and 3 and 4 are vertical rolls. With these horizontal rolls and vertical rolls, plate thickness rolling and plate width rolling are performed. Reference numeral 5 denotes a width detector provided on the exit side of the rolling stand 10 to continuously measure the plate width of the flat bar 6 which is the material to be rolled. The curve C1 in FIG. 5 shows the output of the width detector 5. Due to the influence of skid marks and other factors, the strip width at each position in the longitudinal direction of the rolled material normally varies as shown in the figure. This rolled material 6
When the sheet thickness after rolling is determined at each position in the material length direction as well, it becomes like a curve C3 in FIG. 6 and fluctuates. The plate thickness can be obtained by actually measuring it with a thickness gauge or by using the rolling load of the horizontal roll 1 and the temperature of the material to be rolled. When the plate width variation is caused by temperature unevenness such as skid marks, the curves C1 and C3 are synchronized as shown in the figure. That is, the plate thickness also becomes large at the part where the plate width becomes large, and becomes small at the part where the plate width becomes small. This is because in a region where the temperature is low and the material to be rolled has a large rigidity, the plate thickness and plate width of the same roll gap are both large in plate thickness and plate width, and vice versa in the region where the temperature is low. Of course, it is not always synchronized in this way. For example, if the strip width is changed by changing the running schedule and the strip thickness remains as it is, the two parts are not compatible at this change part.
However, after that, the synchronous changes again occur as shown by the curves C1 and C3. The plate width variation due to skid marks and the like is removed by AGC and becomes flat. At this time, widening occurs in the portion where the plate thickness is large. The variation in thickness and the variation in width caused when the thickness is removed have the relationship shown in FIG. Considering this width expansion, the plate width is substantially the dotted line curve C in FIG.
It is correct to say that it was like 2. Here C2 is C
In addition to 1, the width expansion amount at the time of removing the variation in thickness is added.

ロードセル1aで実測した水平ロール1の圧延負荷と、
図示しないが放射温度計などにより測定した被圧延材6
の温度を用いて板厚変動を算出することができ、これと
幅検出器5で実測した板幅を用いて、実質的な板幅変動
(第5図の曲線C2)を算出し、この板幅変動を除去す
るに必要な竪ロール開度修正量を算出し、この修正量を
トラッキング装置に入力し、被圧延材6の板幅及び板厚
測定部位が後段スタンド11の竪ロール4へ移動すると
き当該部位に対する竪ロール開度修正量をトラッキング
装置より取出し、それにより該竪ロール4の開度を修正
する。第1図の7は上記の演算を行なう、即ち負荷反力
と温度から板厚変動を求め、それによる幅拡がり算出
し、それを幅検出器5が出力する板幅変動に加えて、そ
の総板厚変動を補正するに必要な竪ロール4の開度修正
量を演算する装置であり、8は被圧延材6の移動距離を
取込んでその演算結果を被圧延材の走行に対しトラッキ
ングさせる装置、9はトラッキング装置8が出力をする
修正量に従って竪ロール4の開度修正を行なうエッジャ
ー制御装置である。第2図は上記処理要領を示すフロー
チャートである。厚み変動を除くことにより生じる長さ
方向各位置における幅変動と長手方向各位置における幅
検出器の出力値との和Aは図示のように変動するが、そ
の平均値からの差Δbより、後続スタンドのエッジャー
開度変更量を計算し、当該スタンドのエッジャー開度を
変更する。
The rolling load of the horizontal roll 1 measured by the load cell 1a,
Although not shown, the rolled material 6 measured by a radiation thermometer or the like
It is possible to calculate the plate thickness variation using the temperature of, and the plate width actually measured by the width detector 5 is used to calculate the substantial plate width variation (curve C2 in FIG. 5). The vertical roll opening correction amount necessary for removing the width variation is calculated, and this correction amount is input to the tracking device, and the strip width and strip thickness measurement site of the rolled material 6 moves to the vertical roll 4 of the rear stand 11. At this time, the vertical roll opening correction amount for the relevant portion is taken out from the tracking device, and the opening of the vertical roll 4 is corrected accordingly. In FIG. 1 at 7, the above calculation is performed, that is, the plate thickness variation is obtained from the load reaction force and the temperature, the width expansion is calculated, and the total width is calculated in addition to the plate width variation output by the width detector 5. A device for calculating the opening correction amount of the vertical roll 4 necessary to correct the plate thickness variation, and 8 takes in the moving distance of the material 6 to be rolled and tracks the calculation result with respect to the running of the material to be rolled. The device 9 is an edger control device that adjusts the opening of the vertical roll 4 in accordance with the correction amount output by the tracking device 8. FIG. 2 is a flow chart showing the above processing procedure. The sum A of the width variation at each position in the length direction caused by excluding the thickness variation and the output value of the width detector at each position in the longitudinal direction fluctuates as shown in the figure, but from the difference Δb from the average value, The amount of edger opening change of the stand is calculated, and the edger opening of the stand is changed.

板幅は竪ロールの負荷反力及び板温等から計算により求
めることも可能で、その実施例を第3図に、処理要領を
第4図に示す。3a,4aはエッジャー(竪ロール)の
ロードセル、12は10,11と同様な圧延スタンドで
ある。このようにすれば後段スタンド11で、又は更に
その任意の後段スタンドで板厚変動除去が行なわれ、幅
拡がりが生じても、それを見込んだ板幅補正がしてある
から、均一な板幅が得られる。
The strip width can also be calculated from the load reaction force of the vertical rolls, the strip temperature, etc. An example of the strip width is shown in FIG. 3 and a processing procedure is shown in FIG. 3a and 4a are load cells of an edger (vertical roll), and 12 is a rolling stand similar to 10 and 11. By doing so, even if the plate width variation is removed by the rear stage stand 11 or by any of the rear stage stands and the width is widened, the plate width correction is performed in consideration of it, so that the uniform plate width is obtained. Is obtained.

〔発明の効果〕〔The invention's effect〕

以上説明したように板厚変動を考慮した、竪ロールによ
る板幅制御を行なうので最終製品の板幅を高精度に均一
化することができ、歩留り向上などを図ることができ
る。
As described above, since the plate width is controlled by the vertical roll in consideration of the plate thickness variation, the plate width of the final product can be made uniform with high accuracy, and the yield can be improved.

【図面の簡単な説明】[Brief description of drawings]

第1図〜第4図は本発明の実施例を示す説明図、第5図
〜第7図は板幅、板厚のグラフである。 図面で10,11は圧延スタンド、1,2はその水平ロ
ール、3,4は竪ロール、5は幅検出器、6は被圧延材
である。
1 to 4 are explanatory views showing an embodiment of the present invention, and FIGS. 5 to 7 are graphs of plate width and plate thickness. In the drawing, 10 and 11 are rolling stands, 1 and 2 are horizontal rolls thereof, 3 and 4 are vertical rolls, 5 is a width detector, and 6 is a material to be rolled.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】竪ロール及び水平ロールを有する圧延スタ
ンドを縦続配置してなる圧延設備における自動板幅制御
方法において、 被圧延材の長手方向各点における板幅変動と板厚変動を
検出し、該板厚変動を除いて平坦にしたとき生じる幅拡
がりを該板幅変動に加えて総板幅変動を除くに必要な竪
ロール修正量を求め、各板幅板厚検出点が後段圧延スタ
ンドの竪ロールに到来するとき、当該検出点に対する前
記修正量により該竪ロールの開度を修正することを特徴
とする自動板幅制御方法。
1. An automatic strip width control method in a rolling mill in which rolling stands having vertical rolls and horizontal rolls are cascaded, and a strip width variation and a strip thickness variation at each longitudinal point of a material to be rolled are detected, The width expansion that occurs when flattening the strip thickness variation is added to the strip width variation to obtain the vertical roll correction amount necessary to eliminate the total strip width variation, and each strip width strip thickness detection point is When reaching a vertical roll, the opening amount of the vertical roll is corrected by the correction amount for the detection point, which is an automatic plate width control method.
【請求項2】板幅変動は、幅検出器により実測すること
を特徴とする特許請求の範囲第1項記載の自動板幅制御
方法。
2. The automatic plate width control method according to claim 1, wherein the plate width variation is measured by a width detector.
【請求項3】板厚変動は、圧延スタンド水平ロールの負
荷反力測定値と該ロールにより圧延される被圧延材部位
の温度の測定値を用いて算出することを特徴とする特許
請求の範囲第1項記載の自動板幅制御方法。
3. The plate thickness variation is calculated using a load reaction force measured value of a horizontal roll of a rolling stand and a measured value of a temperature of a material to be rolled rolled by the roll. The automatic plate width control method according to item 1.
JP60037109A 1985-02-26 1985-02-26 Automatic width control method Expired - Lifetime JPH0618654B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60037109A JPH0618654B2 (en) 1985-02-26 1985-02-26 Automatic width control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60037109A JPH0618654B2 (en) 1985-02-26 1985-02-26 Automatic width control method

Publications (2)

Publication Number Publication Date
JPS61195705A JPS61195705A (en) 1986-08-30
JPH0618654B2 true JPH0618654B2 (en) 1994-03-16

Family

ID=12488431

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60037109A Expired - Lifetime JPH0618654B2 (en) 1985-02-26 1985-02-26 Automatic width control method

Country Status (1)

Country Link
JP (1) JPH0618654B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111922090B (en) * 2020-07-09 2022-07-15 首钢京唐钢铁联合有限责任公司 Automatic setting method and system for horizontal value of finishing mill after work roll replacement

Also Published As

Publication number Publication date
JPS61195705A (en) 1986-08-30

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