JPS61195705A - Automatic controlling method for sheet width - Google Patents
Automatic controlling method for sheet widthInfo
- Publication number
- JPS61195705A JPS61195705A JP60037109A JP3710985A JPS61195705A JP S61195705 A JPS61195705 A JP S61195705A JP 60037109 A JP60037109 A JP 60037109A JP 3710985 A JP3710985 A JP 3710985A JP S61195705 A JPS61195705 A JP S61195705A
- Authority
- JP
- Japan
- Prior art keywords
- width
- roll
- fluctuation
- thickness
- 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.)
- Granted
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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は1.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
。[Detailed Description of the Invention] [Industrial Application Field] The present invention comprises 1. The present invention relates to an automatic strip width control method in hot rolling using a rolling stand equipped with vertical rolls and horizontal rolls.
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
ためホット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 board width required by the customer or the subsequent process plus a margin.Since the margin affects yield, it is desirable to keep it as small as possible. Fluctuations must be minimized as much as possible.
ホットストリップの幅変動の原因には、圧延能素材(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 hot strip include the width and end face shape of the rollable material (slab), temperature and temperature unevenness, and tension in the finishing mill. Conventional methods for reducing width fluctuations include setting tolerances for slab width fluctuations and the amount of flaw cleaning, setting limits on skid marks and baking temperature differences, employing loopers with good responsiveness, and reducing mill speed. There are efforts to stabilize finishing rolling tension by improving control, etc., and recently, the vertical roll opening degree is actively changed during rolling, and finishing rolling mill tension is changed during rolling according to width fluctuations. , is considered.
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 strip width control by changing the opening degree of vertical rolls during rolling, there is, for example, Japanese Patent Application Laid-Open No. 101744/1983. This uses the load reaction force and sheet temperature of the vertical rolls as input information, tracks this and changes the opening of the vertical rolls using a feedforward method to reduce fluctuations in sheet width. Continuously determine the surface temperature of the rolled material at each position in the longitudinal direction of the material at the same position as the load reaction force of the upstream vertical roll in a group of hot rough rolling mills equipped with
These values are processed by a storage/arithmetic device to determine the load reaction force deviation and temperature deviation at each position of the material, and necessary to predict the width fluctuation of the rolled material due to these deviations and eliminate the predicted width fluctuation. determining the opening change amount of one or more downstream vertical rolls, and changing the opening degree of the vertical roll based on the vertical roll opening change amount for each position during rolling of the material,
It is characterized by eliminating longitudinal width fluctuations of the material.
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, strip width fluctuations are estimated from the load reaction force deviation and temperature deviation of the vertical rolls, but many rolling mills are now equipped with strip width gauges, and in this case, width fluctuations cannot be measured directly with strip width gauges. Bye.
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−走化を行なったとし
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変動除去の際幅広がりが生じ
、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 accuracy using a plate width gauge and the opening degree of the vertical rolls of the rear rolling mill is adjusted accordingly, this method still has the following problems. In other words, if the width variation is caused by temperature unevenness, then the temperature variation that acts on the vertical rolls and causes the width variation should also act on the horizontal rolls and cause the thickness variation, so the width variation and the thickness variation are synchronized. occurs. By the time the strip becomes the final product, thickness variations are removed by AGC and the strip becomes flat.
When this horizontal roll removes the thickness variation, the width spreads, resulting in width variation. Therefore, simply measuring the width with a plate width meter and adjusting the opening of the vertical rolls according to the measurement results cannot be said to have sufficiently eliminated width fluctuations.
本発明はか\る点に着目するものであって、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 this point and attempts to remove width fluctuations with even higher precision.
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
き生じる幅広がりを杉板幅変動に加えて縁板幅変動を除
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 is an automatic strip width control method for a rolling equipment in which rolling stands having vertical rolls and horizontal rolls are arranged in series, in which strip width fluctuations and strip thickness fluctuations are detected at each point in the longitudinal direction of a material to be rolled. In addition to the cedar plate width variation, the width expansion that occurs when flattening the plate after removing the plate thickness variation is calculated, and the vertical roll correction amount necessary to eliminate the edge plate width variation is calculated, and each plate width plate thickness detection point is When reaching the roll, the opening degree of the vertical roll is corrected by the correction amount for the detection point.
第1図は熱間粗圧延設備の一部を示し、10゜1)は圧
延スタンドで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。Figure 1 shows a part of hot rough rolling equipment, where 10°1) is a rolling stand, 1 and 2 are its horizontal rolls, and 3.4 is a vertical roll. These horizontal rolls and vertical rolls perform plate thickness rolling and plate width rolling. 5 is a rolling stand 10
A width detector provided on the exit side of the rolling stock continuously measures the width of the flat bar 6, which is the material to be rolled. Curve C1 in Figure 5
indicates 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 usually varies as shown in the figure.
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。When the plate thickness of the rolled material 6 after rolling is determined at each position in the longitudinal direction of the material, it is as shown by a curve C3 in FIG. 6, and it fluctuates. By actually measuring the plate thickness with a thickness gauge,
Alternatively, it can be determined by calculating using the rolling load of the horizontal roll 1 and the temperature of the rolled material. When the plate width fluctuation is caused by temperature irregularities such as skid marks, the curve C1 and the curve C3 are synchronized as shown. That is, in areas where the plate width is large, the plate thickness is also large, and in areas where the plate width is small, the plate thickness is also small. This is because in areas where the temperature is low and the rigidity of the rolled material is high, both the plate thickness and plate width are large when rolled with the same roll gap and plate width, and the opposite is true in areas where the temperature is low.
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\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CIと03の如き同期的変化をする。スキッ
ドマークなどによ゛る板厚変動はAGCにより除去され
、フラットになる。Of course, they are not always synchronized in this way; for example, if the width of the board is changed due to a change in the running schedule, but the thickness remains the same, the two will not correspond at this point of change. However, after that, the curve changes synchronously with the curve CI and 03 again. Variations in plate thickness due to skid marks etc. are removed by AGC and the plate becomes flat.
この際、板厚が大なる部分では幅拡がりが生じる。At this time, width expansion occurs in portions where the plate thickness is large.
厚み変動とそれを除いたとき生じる幅変動とは第4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2図の点線曲線C2の如くであった、とする
のが正しい。こ\で02はC1に、厚み変動除去の際の
幅拡がり量を加えたものである。The relationship between the thickness variation and the width variation that occurs when the thickness variation is removed is as shown in FIG. Considering this width expansion, it is correct to assume that the board width was substantially as indicated by the dotted line curve C2 in FIG. Here, 02 is the sum of C1 and the amount of width expansion when removing thickness fluctuations.
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1)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を算出
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が出力する修
正量に従って竪ロール4の開度修正を行なうエツジヤ−
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、後続スタンドのエツジヤ−開
度変更量を計算し、当該スタンドのエツジヤ−開度を変
更する。The rolling load of the horizontal roll 1 actually measured with the load cell 1a,
Although not shown, the rolled material 6 was measured using a radiation thermometer, etc.
Using this temperature and the actual plate width measured by the width detector 5, the actual plate width variation (curve C2 in FIG. Calculate the vertical roll opening correction amount necessary to remove the width fluctuation, input this correction amount into the tracking device, and move the plate width and plate thickness measurement portion of the rolled material 6 to the vertical roll 4 of the rear stand 1). When moving, the vertical roll opening degree correction amount for the relevant part is taken out from the tracking device, and the opening degree of the vertical roll 4 is corrected accordingly. 7 in FIG. 1 performs the above calculation, that is, calculates the plate thickness variation from the load reaction force and temperature, calculates the resulting width expansion, adds it to the plate width variation output by the width detector 5, and calculates the plate thickness variation from the load reaction force and temperature. This is a device that calculates the opening degree correction amount of the vertical rolls 4 necessary to correct variations in total plate thickness, and 8 takes in the moving distance of the material to be rolled 6 and tracks the calculation result with respect to the travel of the material to be rolled. 9 is an edger for correcting the opening of the vertical roll 4 according to the correction amount output by the tracking device 8;
It is a control device. FIG. 2 is a flowchart showing the above processing procedure. The sum A of the width variation at each position in the longitudinal direction caused by removing the thickness variation and the output value of the width detector at each position in the longitudinal direction varies as shown in the figure, but from the difference Δb from the average value, the subsequent The amount of change in the edger opening 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はエソジャー(竪ロール)の
ロードセル、12は10゜1)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1)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
拡がりが生しても、それを見込んだ板幅補正がしである
から、均一な板幅が得られる。The plate width can also be determined by calculation from the load reaction force of the vertical rolls, the plate temperature, etc. An example thereof is shown in FIG. 3, and a processing procedure is shown in FIG. 4. 3a and 4a are load cells for Esoger (vertical rolls), and 12 is a rolling stand similar to the 10° 1). In this way, plate thickness fluctuations are removed in the subsequent stand 1) or any subsequent stand, and even if width expansion occurs, the plate width is corrected to account for it, so that uniformity can be achieved. The board width is obtained.
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 explained above, since the plate width is controlled by vertical rolls in consideration of plate thickness fluctuations, the plate width of the final product can be made uniform with high accuracy, and the yield can be improved.
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io、il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。
第1図
第8図
第4図
第5図
第7図FIGS. 1 to 4 are explanatory diagrams showing examples of the present invention, and FIGS. 5 to 7 are graphs of plate width and plate thickness. In the drawings, io and il are rolling stands, 1.2 is a horizontal roll, 3.4 is a vertical roll, 5 is a width detector, and 6 is a material to be rolled. Figure 1 Figure 8 Figure 4 Figure 5 Figure 7
Claims (3)
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) In an automatic strip width control method in a rolling equipment in which rolling stands having vertical rolls and horizontal rolls are arranged in series, variations in strip width and thickness at each point in the longitudinal direction of a material to be rolled are detected, and Add the width expansion that occurs when flattening the strip excluding thickness variation to the width variation, calculate the vertical roll correction amount necessary to eliminate the total strip width variation, and set each strip width thickness detection point to the vertical roll of the subsequent rolling stand. An automatic board width control method characterized in that when the detection point is reached, the opening degree of the vertical roll is corrected by the correction amount for the detection point.
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 board width control method according to claim 1, wherein the board width fluctuation is actually measured by a width detector.
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 the measured value of the load reaction force of the horizontal roll of the rolling stand and the measured value of the temperature of the part of the rolled material rolled by the roll. Automatic board width control method described in Section 1.
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 true JPS61195705A (en) | 1986-08-30 |
JPH0618654B2 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) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111922090A (en) * | 2020-07-09 | 2020-11-13 | 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 |
-
1985
- 1985-02-26 JP JP60037109A patent/JPH0618654B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111922090A (en) * | 2020-07-09 | 2020-11-13 | 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 |
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 |
---|---|
JPH0618654B2 (en) | 1994-03-16 |
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