JPH02192811A - Method for controlling pickling speed of steel strip - Google Patents
Method for controlling pickling speed of steel stripInfo
- Publication number
- JPH02192811A JPH02192811A JP1119389A JP1119389A JPH02192811A JP H02192811 A JPH02192811 A JP H02192811A JP 1119389 A JP1119389 A JP 1119389A JP 1119389 A JP1119389 A JP 1119389A JP H02192811 A JPH02192811 A JP H02192811A
- Authority
- JP
- Japan
- Prior art keywords
- steel strip
- speed
- pickling
- catenary
- total
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 56
- 239000010959 steel Substances 0.000 title claims abstract description 56
- 238000005554 pickling Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims description 12
- 238000007654 immersion Methods 0.000 abstract description 32
- 239000002253 acid Substances 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、鋼帯を複数の酸洗槽内に所定の速度で順次通
過させて鋼帯表面のスケールを除去する酸洗設備におけ
る鋼帯の酸洗速度制御方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Field of Application The present invention is directed to pickling equipment for removing scale from the surface of a steel strip by sequentially passing the steel strip through a plurality of pickling tanks at a predetermined speed. The present invention relates to a method for controlling the pickling speed of a strip.
（ロ）従来技術
従来、連続酸洗ライン等の鋼帯の酸洗速度制御方法とし
ては、第１図に示すように、酸洗槽１内における鋼帯２
のカテナリ位置ｙを酸洗槽１の下部に設置したマグネッ
ト式の鋼帯検出器３によって検出し、酸洗槽１の出入側
に設けられた各プライドル・ロール４．５が鋼帯２を所
定のカテナリ位置ｙになるように制御している。(B) Prior Art Conventionally, as a method for controlling the pickling speed of steel strips in a continuous pickling line, etc., as shown in FIG.
The catenary position y is detected by a magnetic steel strip detector 3 installed at the bottom of the pickling tank 1, and each priddle roll 4.5 installed at the entrance and exit side of the pickling tank 1 moves the steel strip 2 to a specified position. It is controlled so that the catenary position is y.
なお、説明の便宜上、カテナリの寸法関係を第２図に示
す。酸洗液に浸漬されているカテナリの長さをｌ、その
最高値をｈ、酸洗槽１の底からカテナリまでの最短距離
をｙとする。Incidentally, for convenience of explanation, the dimensional relationship of the catenary is shown in FIG. The length of the catenary immersed in the pickling solution is l, its maximum value is h, and the shortest distance from the bottom of the pickling tank 1 to the catenary is y.
酸洗槽１内の鋼帯との浸漬長さΣ１ ＝１ 、＋１２＋
１３はカテナリ位置ｙを一定とすれば、一定長さとみな
し、酸濃度、酸濃度、鋼帯との熱間での巻取温度、スキ
ンバスまたはテンション・レベラ等により付与される表
面歪等によって、決定される必要酸洗時間により、酸洗
速度を求め、上位コンピュータにより速度設定回路９に
設定している。Immersion length Σ1 with steel strip in pickling tank 1 =1, +12+
13 is assumed to be a constant length if the catenary position y is constant, and depending on the acid concentration, acid concentration, hot winding temperature with the steel strip, surface strain imparted by a skin bath or tension leveler, etc. The pickling speed is determined based on the determined required pickling time and is set in the speed setting circuit 9 by the host computer.
また、鋼帯との浸漬長さΣｌは設定カテナリ位置ｙによ
って求め、必要酸洗速度を決定している。Further, the immersion length Σl with the steel strip is determined based on the set catenary position y, and the required pickling speed is determined.
しかし、薄物鋼帯を高速で酸洗するときは、設定カテナ
リ位置ｙを大幅に逸脱し、制御範囲を超える。この現象
を回避するため従来は、オペレータが鋼帯の実績カテナ
リ位置ｙを監視して制御範囲を外れるようなことがある
と、酸洗速度を低下させて、安定なカテナリを作るよう
に操作していた。However, when pickling a thin steel strip at high speed, the catenary position y greatly deviates from the set catenary position and exceeds the control range. In order to avoid this phenomenon, conventionally, an operator monitors the actual catenary position y of the steel strip, and if the actual catenary position y goes out of the control range, the operator reduces the pickling speed to create a stable catenary. was.
このように、オペレータの手動操作は、非常に煩しいと
共に、各種の浸漬深さｈを実測していないため、浸漬長
さΣｌが不正確で、ライン速度を安全をとって低めに設
定し操業していた。In this way, the operator's manual operation is very troublesome, and since the various immersion depths h are not actually measured, the immersion length Σl is inaccurate, and the line speed is set to a low value for safety. Was.
従来の酸洗速度制御方法においては、鋼帯とはスキッド
式キャブ１５の上面との滑動抵抗と、酸洗槽１の液との
粘性抵抗とにより、出側になるほど鋼帯２の張力が大き
くなり、鋼帯との浸漬高さｈは小さくなる。In the conventional pickling speed control method, the tension of the steel strip 2 increases toward the exit side due to sliding resistance between the steel strip and the top surface of the skid-type cab 15 and viscous resistance with the liquid in the pickling tank 1. Therefore, the immersion height h with respect to the steel strip becomes smaller.
この傾向は、酸洗速度が高速になるほど助長され、鋼帯
２は浮き上がる。酸洗槽１の入側槽下部に設置したマグ
ネット式鋼帯検出器３を設定カテナリ位Ｍｙになるよう
に制御しても、ライン速度が変化するごとに各種の鋼帯
との浸漬高さ（または浸漬長さ）が変化している。This tendency is promoted as the pickling speed becomes faster, and the steel strip 2 rises up. Even if the magnetic steel strip detector 3 installed at the bottom of the inlet tank of the pickling tank 1 is controlled to be at the set catenary level My, the immersion height ( or immersion length) is changing.
そのため、速度設定いかんによっては、過度の酸洗時間
となり、ライン処理能力低下、または、過少酸洗時間と
なり、安全に鋼帯との表面スケールが除去できず、スケ
ール残りを発生させるという問題があった。Therefore, depending on the speed setting, the pickling time may be too long, reducing line processing capacity, or it may be too little pickling time, making it impossible to safely remove scale from the surface of the steel strip, resulting in scale remaining. Ta.
また、鋼帯との平坦状況、溶接部く厚み、幅が異なる）
でも、各種の浸漬高さｈは、一定速度でも異なり、一方
マグネット式鋼帯検出器３も、鋼帯との成分により、出
力値が異なるという問題があった。In addition, the flatness with the steel strip, the thickness and width of the welded part are different)
However, the various immersion heights h differ even at a constant speed, and the magnetic steel strip detector 3 also has a problem in that its output value varies depending on the composition with the steel strip.
（ハ）発明が解決しようとする課題
本発明が解決しようとする課題は、鋼帯の成分、寸法、
平坦状況、ライン速度等の相違により、変化している各
酸洗槽内の各鋼帯の浸漬高さｈを求め、速度補正を行う
ことにより安定した酸洗速度を制御する方法を得ること
にある。(c) Problems to be solved by the invention The problems to be solved by the invention are the composition and dimensions of the steel strip,
We determined the immersion height h of each steel strip in each pickling tank, which changes due to differences in flatness conditions, line speeds, etc., and obtained a method to control a stable pickling speed by correcting the speed. be.
（ニ）課題を解決するための手段
本発明の鋼帯の酸洗速度制御方法は、鋼帯を複数の酸洗
槽内に所定の速度で順次通過させて鋼帯表面のスケール
を除去する酸洗設備において、各酸洗槽内に浸漬されて
いる鋼帯の各カテナリ高さ（ｈ＋、ｈ２・・・・・ｈ、
）を測定し、該各高さの合計値（Ｆ（）を求め、一方、
所定の酸洗槽内における鋼帯のカテナリ頂部と該酸洗槽
底面との間の距離（ｙｎ）を測定し、前記高さ合計値と
前記間隔距駈（ｙｎ）とにもとづいて、鋼帯の設定速度
を補正することからなる手段によって、上記課題を解決
している。(d) Means for Solving the Problems The steel strip pickling speed control method of the present invention involves passing the steel strip sequentially through a plurality of pickling tanks at a predetermined speed to remove scale from the surface of the steel strip. In the cleaning equipment, each catenary height (h+, h2... h,
), and find the total value (F()) of each height, while,
The distance (yn) between the top of the catenary of the steel strip and the bottom surface of the pickling tank in a predetermined pickling tank is measured, and based on the total height value and the spacing distance (yn), the steel strip is The above problem is solved by means of correcting the set speed of the motor.
（ホ）実施例
本発明の鋼帯の酸洗速度制御方法の実施例について、第
１図から第３図までを参照して説明する。(E) Example An example of the method for controlling the pickling rate of steel strip according to the present invention will be described with reference to FIGS. 1 to 3.
本発明の鋼帯の酸洗速度制御方法は、鋼帯２を複数の酸
洗槽１内に所定の速度で順次通過させて鋼帯表面のスケ
ールを除去する酸洗設備に適用される。本発明の方法で
は、各酸洗槽１内に浸漬されている鋼帯２の各カテナリ
高さ（ｈｔ＋ｈｚ・・・・・ｈ、）を後述する検出器１
０によってそれぞれ測定し、各高さの合計値（Ｈ）を求
め、一方、所定の酸洗槽内における鋼帯のカテナリ頂部
と酸洗槽底面との間の距離（ｙｎ）を前述した検出器３
によって測定し、高さ合計値Ｈと間隔距離（ｙｎ）とに
もとづいて、鋼帯の設定速度を補正する。The steel strip pickling speed control method of the present invention is applied to pickling equipment that removes scale from the steel strip surface by sequentially passing the steel strip 2 through a plurality of pickling tanks 1 at a predetermined speed. In the method of the present invention, a detector 1 (described later) measures each catenary height (ht+hz...h,) of the steel strip 2 immersed in each pickling tank 1.
0 respectively to obtain the total value (H) of each height, and on the other hand, measure the distance (yn) between the catenary top of the steel strip and the bottom of the pickling tank in a given pickling tank using the above-mentioned detector. 3
The set speed of the steel strip is corrected based on the total height value H and the interval distance (yn).
第１図において、マグネット式鋼帯検出器３で初期のカ
テナリ位置ｙを設定する。各種の浸漬高さ検出器１０で
各種の浸漬高さｈ＋、ｈ２．ｈ３を検出することにより
２合計浸漬長さ演算回路１３で粗段階の浸漬長さを演算
する。速度設定回路９では、浸漬長さは一定とみなして
いる。速度設定回路９において、一定とみなしている浸
漬長さを設定回路１４で設定する。合計浸漬長さ演算回
路１３によって演算した浸漬長さと、合計浸漬長さ設定
回路１４の偏差長さを速度補正演算回路９１で速度演算
し、速度補正を行う。In FIG. 1, an initial catenary position y is set using a magnetic steel strip detector 3. Various immersion heights h+, h2 . By detecting h3, the two total immersion length calculation circuit 13 calculates the immersion length in the rough stage. The speed setting circuit 9 assumes that the immersion length is constant. In the speed setting circuit 9, the immersion length, which is regarded as constant, is set in the setting circuit 14. The speed correction calculation circuit 91 calculates the speed of the immersion length calculated by the total immersion length calculation circuit 13 and the deviation length of the total immersion length setting circuit 14, and performs speed correction.
速度設定回路って設定された速度は、カテナリ位置設定
回路６で設定されたカテナリ位置ｙになるように速度指
令値が出され、入側および出側駆動電動機４１．５１を
かいして入側および出側のプライドル・ロール４．５が
駆動される。The speed set by the speed setting circuit outputs a speed command value so that the catenary position y is set by the catenary position setting circuit 6. And the exit side priddle roll 4.5 is driven.
酸洗槽１の各種の鋼帯との浸漬高さｈｌ、ｈｚ。Immersion height hl, hz of various steel strips in pickling tank 1.
ｈ３・・・・は浸漬高さ検出１０によって検出され、合
計浸漬長さ演算回路１３により浸漬長さに演算される。h3... is detected by the immersion height detection 10, and is calculated by the total immersion length calculation circuit 13 into the immersion length.
速度設定回路９は合計浸漬長さを一定長さとみなし、酸
濃度、酸濃度、鋼帯との熱間での巻取温度、スキンパス
またはテンション・レベラ等により付与される表面歪等
によって決定される必要酸洗時間により、酸洗速度を求
め、上位コンピュータにより設定する。速度設定回路９
により一定値とみなしている合計浸漬長さが合計浸漬長
さ設定回路１４に設定される。合計浸漬長さ演算回路１
３と合計浸漬長さ設定回路１４の偏差が速度補正演算回
路９１で速度換算され、速度設定回路って設定された速
度指令値を補正する。The speed setting circuit 9 regards the total immersion length as a constant length, and is determined by the acid concentration, the hot winding temperature with the steel strip, the surface strain imparted by a skin pass or tension leveler, etc. The pickling speed is calculated based on the required pickling time and set by the host computer. Speed setting circuit 9
The total immersion length, which is regarded as a constant value, is set in the total immersion length setting circuit 14. Total immersion length calculation circuit 1
3 and the total immersion length setting circuit 14 are converted into speed by a speed correction calculation circuit 91, and the speed setting circuit corrects the set speed command value.
通常の鋼帯の送り速度制御は、第１図に示すように、出
入側プライドル・ロール４．５とも同一の制御方式をと
っている。すなわち、プライドル・ロール４．５を駆動
するモータ４１．５１は速度設定回路９からの設定値と
モータに直結した速度計４４．５４からの実測値を比較
し、その偏差にもとづいて自動速度制御器４３．５３お
よびモータ駆動回路４２．５２をかいして、速度制御さ
れている。As shown in FIG. 1, normal steel strip feed rate control uses the same control method for the inlet and outlet pridle rolls 4.5. That is, the motor 41.51 that drives the priddle roll 4.5 compares the set value from the speed setting circuit 9 with the actual value from the speedometer 44.54 directly connected to the motor, and performs automatic speed control based on the deviation. The speed is controlled through a motor drive circuit 43.53 and a motor drive circuit 42.52.
浸漬高さ検出器１０の一例を第３図に示す。本実施例で
は、ガイド・ロッド１０１の先端にタッチ・ロール１０
２を回転自在に取り付け、ガイドロッド１０１の上下動
をポテンショメータ１０３で計測する。An example of the immersion height detector 10 is shown in FIG. In this embodiment, a touch roll 10 is attached to the tip of the guide rod 101.
2 is rotatably attached, and the vertical movement of the guide rod 101 is measured with a potentiometer 103.
くべ）効果
本発明によれば、鋼帯の成分、寸法、平坦状況、ライン
速度等の相違により、変化している酸洗槽の鋼帯の浸漬
長さを正確に検出し、適正酸洗速度を制御できるため、
温度の速度設定によるライン能力低下、または過少速度
設定によるスケール残りを防止できる。Effect) According to the present invention, the immersion length of the steel strip in the pickling tank, which changes due to differences in steel strip composition, dimensions, flatness, line speed, etc., can be accurately detected, and the appropriate pickling speed can be determined. Because you can control
It is possible to prevent a decrease in line capacity due to temperature speed settings or scale remaining due to underspeed settings.
第１図は本発明の鋼帯の酸洗速度制御方法の概略説明図
。第２図は酸洗槽に浸漬された鋼帯の寸法関係を示す説
明図。第３図は鋼帯のカテナリ高さ検出器の一例の説明
図。
３：マグネット式鋼帯検出器
１０・浸漬高さ検出器
２：鋼帯 ４．５；プライドル・ロール（外４名）FIG. 1 is a schematic explanatory diagram of the method for controlling the pickling rate of steel strip according to the present invention. FIG. 2 is an explanatory diagram showing the dimensional relationship of the steel strip immersed in the pickling tank. FIG. 3 is an explanatory diagram of an example of a catenary height detector for steel strips. 3: Magnetic steel strip detector 10/Immersion height detector 2: Steel strip 4.5; Priddle roll (4 other people)
Claims (1)
帯表面のスケールを除去する酸洗設備において、各酸洗
槽内に浸漬されている鋼帯の各カテナリ高さ（ｈ＿１，
ｈ＿２……ｈ＿ｎ）を測定し、該各高さの合計値（Ｈ）
を求め、一方、所定の酸洗槽内における鋼帯のカテナリ
頂部と該酸洗槽底面との間の距離（ｙ＿ｎ）を測定し、
前記高さ合計値と前記間隔距離（ｙ＿ｎ）とにもとづい
て、鋼帯の設定速度を補正することを特徴とした鋼帯の
酸洗速度制御方法。In pickling equipment that removes scale from the surface of the steel strip by sequentially passing the steel strip through a plurality of pickling tanks at a predetermined speed, each catenary height (h_1) of the steel strip immersed in each pickling tank is ，
h_2...h_n), and the total value of each height (H)
On the other hand, measure the distance (y_n) between the top of the catenary of the steel strip and the bottom of the pickling tank in a predetermined pickling tank,
A method for controlling a pickling speed of a steel strip, comprising correcting a set speed of the steel strip based on the total height value and the interval distance (y_n).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1119389A JPH02192811A (en) | 1989-01-20 | 1989-01-20 | Method for controlling pickling speed of steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1119389A JPH02192811A (en) | 1989-01-20 | 1989-01-20 | Method for controlling pickling speed of steel strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02192811A true JPH02192811A (en) | 1990-07-30 |
Family
ID=11771219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1119389A Pending JPH02192811A (en) | 1989-01-20 | 1989-01-20 | Method for controlling pickling speed of steel strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02192811A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2883982A1 (en) * | 2013-12-10 | 2015-06-17 | VDEh-Betriebsforschungsinstitut GmbH | Device and method for detecting the progression of a removal process on the surface of a cold rolled and/or hot-rolled steel |
| JP6091680B1 (en) * | 2016-03-30 | 2017-03-08 | 株式会社淀川製鋼所 | Catenary measuring apparatus and catenary measuring method for pickling equipment |
| CN115044917A (en) * | 2022-06-21 | 2022-09-13 | 北京首钢冷轧薄板有限公司 | Method and device for determining pickling speed of hot-rolled strip steel |
-
1989
- 1989-01-20 JP JP1119389A patent/JPH02192811A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2883982A1 (en) * | 2013-12-10 | 2015-06-17 | VDEh-Betriebsforschungsinstitut GmbH | Device and method for detecting the progression of a removal process on the surface of a cold rolled and/or hot-rolled steel |
| JP6091680B1 (en) * | 2016-03-30 | 2017-03-08 | 株式会社淀川製鋼所 | Catenary measuring apparatus and catenary measuring method for pickling equipment |
| CN115044917A (en) * | 2022-06-21 | 2022-09-13 | 北京首钢冷轧薄板有限公司 | Method and device for determining pickling speed of hot-rolled strip steel |
| CN115044917B (en) * | 2022-06-21 | 2023-10-03 | 北京首钢冷轧薄板有限公司 | Method and device for determining pickling speed of hot rolled strip steel |
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