JP2003226911A - System for automatically setting acceleration/ deceleration of line speed in continuous annealing line - Google Patents
System for automatically setting acceleration/ deceleration of line speed in continuous annealing lineInfo
- Publication number
- JP2003226911A JP2003226911A JP2002026366A JP2002026366A JP2003226911A JP 2003226911 A JP2003226911 A JP 2003226911A JP 2002026366 A JP2002026366 A JP 2002026366A JP 2002026366 A JP2002026366 A JP 2002026366A JP 2003226911 A JP2003226911 A JP 2003226911A
- Authority
- JP
- Japan
- Prior art keywords
- line
- line speed
- control circuit
- acceleration
- deceleration rate
- 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.)
- Withdrawn
Links
Landscapes
- Control Of Heat Treatment Processes (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Coating With Molten Metal (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、連続溶融めっき設備，
連続焼鈍設備等、焼鈍設備を備えた連続ラインに通板さ
れる鋼帯のライン速度を変更する際、板温外れなく加減
速レートを自動的に設定するシステムに関する。
【０００２】
【従来技術及び問題点】連続溶融めっき設備では、還元
焼鈍で表面が活性化された鋼帯を溶融めっき浴に導入
し、溶融めっき金属を鋼帯表面に付着させた後、溶融め
っき浴から引き上げ、めっき付着量を調整している。こ
のとき、合金層を含めて安定した溶融めっき層を形成す
る上で、溶融めっき浴に導入される鋼帯の温度を一定に
維持することが必要である。同じ板厚の溶融めっき鋼板
を製造する場合にはライン速度を一定にしたままで操業
が継続されるため、還元焼鈍炉からスナウトを経て溶融
めっき浴に導入される鋼帯の温度条件が安定化してい
る。しかし、めっき原板の連続通板時に板厚が変更され
ると、焼鈍炉の能力の制約によりライン速度を変更する
ことがある。
【０００３】ライン速度を変更するとき、先行鋼帯に対
する加熱条件の影響を受けて後続鋼帯の温度が目標加熱
温度からずれる板温外れが生じやすい。そこで、ライン
速度変更点が焼鈍炉に入る前又は焼鈍炉を通過するタイ
ミングで板温を確認しながらライン速度を徐々に変更す
ることにより板温外れを防止している。ライン速度の変
更は、連続溶融めっき設備に限らず、他の連続焼鈍設備
においても同様に採用されている。しかしながら、オペ
レータの手動操作によりライン速度を徐々に変更する従
来の方式では、オペレータの熟練度に依存する部分が大
きく、板温外れを十分に抑制するまでには至っていな
い。しかも、ライン速度の変更時にオペレータが板温の
監視に張り付くことになり、他の作業が全くできなくな
る。仮に板温監視よりも急を要する事態が発生した場
合、板温の監視ができず、結果として板温外れが発生す
ることもある。
【０００４】
【課題を解決するための手段】本発明は、このような問
題を解消すべく案出されたものであり、板温を定期的に
測定しながら板温測定値に基づいてライン速度の加減速
レート及び加熱条件を自動設定することにより、板温外
れを防止し、高い信頼性で鋼帯を目標温度に加熱し、或
いは所期の焼鈍状態に仕上げることを目的とする。
【０００５】本発明の加減速レート自動設定システム
は、その目的を達成するため、操作パネルからライン速
度変更指令がライン速度制御機構を経由してプロセスコ
ンピュータのライン制御回路に入力され、ライン速度変
更指令に対応する操業条件変更処理指令がライン制御回
路から板温制御回路に出力され、板温制御回路において
操業条件変更処理指令に対応する加減速レートを所定周
期で設定計算し、設定計算結果を加減速レート制御信号
としてライン制御回路に戻し、ライン制御回路で加減速
レート制御信号に基づいて設定後のライン速度及び燃焼
量を演算し、ライン速度変更指令をライン速度制御機構
に、燃焼量変更指令を炉況変更制御機構に出力すること
を特徴とする。
【０００６】
【実施の形態】本発明の加減速レート自動設定システム
は、ライン全体を制御するプロセスコンピュータ１０に
ライン速度制御機構２０，炉況変更制御機構３０（図
１）を備えさせており、所定周期ごとに繰り返される演
算及び演算結果（図２）に従って鋼帯のライン速度及び
連続焼鈍炉の稼動条件を制御する。プロセスコンピュー
タ１０は、製造指令用コンピュータ（図示せず）から入
力された製造指令データに基づいて、製造指令に対応す
る製品の製造に必要なライン速度，ライン張力，長さ，
焼鈍温度，焼鈍パターン等、各種条件を設定計算する。
また、製造実績データもプロセスコンピュータ１０に収
集される。
【０００７】ライン速度制御機構２０は、ライン速度，
張力，コイル搬送，各種タイミング等、主としてライン
の電気関係を制御するコンピュータであり、基本的には
処理の高速性が要求されるため数ｍ／秒の周期で演算を
繰り返している。炉況変更制御機構３０は、炉温，板
温，薬液濃度等、主として計装関係を制御するコンピュ
ータであり、ライン速度制御機構２０ほど演算処理の高
速性が要求されないので１秒程度の周期で演算を繰り返
している。
【０００８】鋼帯のライン速度を変更するとき、操作パ
ネル２１からライン速度制御機構２０を経てプロセスコ
ンピュータ１０のライン制御回路１１にライン速度変更
指令ｓ1が出力される。ライン制御回路１１では、入力
されたライン速度変更指令ｓ1に基づいてライン速度変
更後の操業条件を演算して操業条件変更処理指令ｓ2と
して板温制御回路１２に出力する。板温制御回路１２で
は、入力された操業条件変更処理指令ｓ 2に対応する加
減速レートを所定周期（たとえば、５秒）ごとに演算
し、板温外れが生じないように焼鈍炉の能力を考慮して
ライン速度の設定を繰り返し、設定後のライン速度に対
応した連続焼鈍炉の燃焼量を計算する。
【０００９】設定後のライン速度及び燃焼量の計算結果
は、加減速レート制御信号ｓ3としてライン制御回路１
１に戻される。ライン制御回路１１では、入力された加
減速レート制御信号ｓ3に基づいて所定周期後のライン
速度を演算してライン速度変更指令ｓ4をライン速度制
御機構２０に出力し、また演算された所定周期後の燃焼
量を表す燃焼量変更指令ｓ5を炉況変更制御機構３０に
出力する。
【００１０】ライン速度制御機構２０は、加減速レート
制御信号ｓ3に基づいて演算されたライン速度を目標設
定速度と比較し、目標設定速度に等しくなるまでライン
速度の設定を繰り返す。他方、炉況変更制御機構３０で
は、設定後のライン速度に対応する燃焼量を燃焼量変更
指令ｓ5に基づいて設定，制御する。ライン速度の設定
及び燃焼量の演算は、所定周期ごとに繰り返され、常に
ライン速度に見合った燃焼量で連続焼鈍炉が稼動され
る。そのため、連続焼鈍炉に送り込まれた鋼帯は、変更
後のライン速度に見合った条件下で加熱され、板温外れ
なく所定の熱処理が施される。
【００１１】
【発明の効果】以上に説明したように、本発明において
は、操作パネルから入力されたライン速度変更指令に応
じて、鋼帯の加減速レートが演算され、演算結果に対応
するライン速度がライン速度制御機構で設定され、設定
後のライン速度に見合った燃焼条件が炉況変更制御機構
で算出される。このように、連続焼鈍炉の能力を考慮し
ながら適正な加減速レートでライン速度が所定周期で繰
返し設定されるため、板温外れ等のトラブルを発生させ
ることなくライン速度が自動的に変更される。しかも、
作業者の熟練度に依存することなくライン速度を変更で
きるため、大幅な省力化が図られる。DETAILED DESCRIPTION OF THE INVENTION
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention
Passing through continuous lines equipped with annealing equipment such as continuous annealing equipment
When changing the line speed of the steel strip to be changed,
The present invention relates to a system for automatically setting a speed rate.
[0002]
[Prior art and problems] In continuous hot-dip plating equipment, reduction
Introducing the steel strip whose surface has been activated by annealing into the hot-dip plating bath
After the hot-dip plating metal adheres to the steel strip surface,
The plating bath is lifted from the bath to adjust the coating weight. This
In this case, a stable hot-dip layer including the alloy layer is formed.
The temperature of the steel strip introduced into the hot-dip plating bath
It is necessary to maintain. Hot-dip coated steel sheet of the same thickness
Operating at a constant line speed when manufacturing
Is melted via a snout from a reduction annealing furnace
The temperature condition of the steel strip introduced into the plating bath is stable.
You. However, the sheet thickness was changed during continuous passing
Changes the line speed due to the restriction of the capacity of the annealing furnace
Sometimes.
[0003] When changing the line speed, the
Temperature of the succeeding steel strip affected by the heating conditions
It is easy for the plate temperature to deviate from the temperature. So the line
Tie before the speed change point enters or passes through the annealing furnace
Change the line speed gradually while checking the plate temperature
This prevents the temperature from falling off. Line speed variation
In addition to continuous hot-dip plating equipment, other continuous annealing equipment
Is adopted in the same way. However, the operation
The line speed is gradually changed by manual operation of the
In the conventional method, a large part depends on the skill of the operator.
It has not reached the point where it is possible to sufficiently control
No. In addition, when changing the line speed, the operator
You will stick to the surveillance and you will not be able to do any other work at all
You. If a situation that requires more urgency than plate temperature monitoring occurs
Temperature cannot be monitored, resulting in temperature loss
Sometimes.
[0004]
The present invention addresses such problems.
It was devised to solve the problem,
Acceleration / deceleration of line speed based on sheet temperature measurement while measuring
By automatically setting the rate and heating conditions,
Heating the steel strip to the target temperature with high reliability, or
The purpose is to finish to the intended annealing state.
[0005] The automatic acceleration / deceleration rate setting system of the present invention
To achieve the purpose, the line speed from the operation panel
Process change command via the line speed control mechanism.
Input to the line control circuit of the
Operating condition change processing command corresponding to the
From the road to the plate temperature control circuit,
Set the acceleration / deceleration rate corresponding to the operating condition change
Setting calculation in the period
Return to the line control circuit as
Line speed and combustion after setting based on rate control signal
Calculate the amount and send the line speed change command to the line speed control mechanism
Output the combustion amount change command to the furnace condition change control mechanism
It is characterized by.
[0006]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Automatic acceleration / deceleration rate setting system of the present invention
To the process computer 10 that controls the entire line
Line speed control mechanism 20, furnace condition change control mechanism 30 (FIG.
1), which is repeated every predetermined period
And the line speed of the steel strip according to the calculation results (FIG. 2).
Control the operating conditions of the continuous annealing furnace. Process computing
10 is input from a production instruction computer (not shown).
Based on the input manufacturing command data,
Line speed, line tension, length,
Various conditions such as annealing temperature and annealing pattern are set and calculated.
Manufacturing performance data is also stored in the process computer 10.
Gathered.
The line speed control mechanism 20 controls the line speed,
Mainly line, such as tension, coil conveyance, various timing
Is a computer that controls the electrical relationships of
Since high-speed processing is required, calculations are performed at intervals of several meters / second.
Repeat. The furnace condition change control mechanism 30 includes a furnace temperature,
Computer that mainly controls instrumentation such as temperature and chemical concentration
And the processing speed is higher as the line speed control mechanism 20 is higher.
Calculation is repeated at a cycle of about 1 second because speed is not required
are doing.
[0008] When changing the line speed of the steel strip,
Through the line speed control mechanism 20 from the
Line speed change to line control circuit 11 of computer 10
Command s1Is output. In the line control circuit 11, the input
Line speed change command s1Line speed change based on
Calculate the operating conditions after the update and change the operating conditionsTwoWhen
And outputs it to the sheet temperature control circuit 12. In the sheet temperature control circuit 12
Is the input operating condition change processing command s TwoCorresponding to
Calculate the deceleration rate every predetermined cycle (for example, every 5 seconds)
And taking into account the capacity of the annealing furnace so that
Repeat the line speed setting and adjust the line speed after setting.
Calculate the corresponding amount of burning in the continuous annealing furnace.
Calculation results of line speed and combustion amount after setting
Is the acceleration / deceleration rate control signal sThreeAs line control circuit 1
Returned to 1. The line control circuit 11
Deceleration rate control signal sThreeLine after a predetermined period based on
Calculate speed and change line speed command sFourThe line speed control
Is output to the control mechanism 20 and the combustion after a predetermined cycle calculated.
Combustion amount change command s indicating amountFiveTo the furnace condition change control mechanism 30
Output.
The line speed control mechanism 20 controls the acceleration / deceleration rate.
Control signal sThreeSet the line speed calculated based on
Compare with the constant speed, and line until it becomes equal to the target set speed.
Repeat the speed setting. On the other hand, the furnace condition change control mechanism 30
Changes the combustion amount corresponding to the set line speed
Command sFiveSet and control based on Setting line speed
And the calculation of the combustion amount are repeated at predetermined intervals, and are always
The continuous annealing furnace is operated with the combustion amount corresponding to the line speed.
You. Therefore, the steel strip sent to the continuous annealing furnace was changed
Heated under conditions suitable for the subsequent line speed, the sheet temperature deviated
And a predetermined heat treatment is performed.
[0011]
As described above, in the present invention,
Responds to the line speed change command input from the operation panel.
First, the acceleration / deceleration rate of the steel strip is calculated and corresponds to the calculation result
Line speed to be set by the line speed control mechanism
Combustion conditions corresponding to the line speed after
Is calculated. Thus, considering the capacity of the continuous annealing furnace,
The line speed repeats in a predetermined cycle at an appropriate acceleration / deceleration rate.
This will cause troubles such as temperature loss of the plate.
The line speed is automatically changed without any change. Moreover,
Line speed can be changed without depending on the skill of the operator
As a result, significant labor savings can be achieved.
【図面の簡単な説明】
【図１】 本発明に従った加減速レート自動設定システ
ムの概略図
【図２】 加減速レートを自動設定するフロー図
【符号の説明】
ｓ1：ライン速度変更指令 ｓ2：操業条件変更処理指
令 ｓ3：加減速レート制御信号 ｓ4：ライン速度
変更指令 ｓ5：燃焼量変更指令Schematic diagram of acceleration and deceleration rate automatic setting system in accordance with BRIEF DESCRIPTION OF THE DRAWINGS [Figure 1] The present invention FIG. 2 is a flow diagram for automatically setting the deceleration rate [EXPLANATION OF SYMBOLS] s 1: line speed change command s 2 : Operation condition change processing command s 3 : Acceleration / deceleration rate control signal s 4 : Line speed change command s 5 : Combustion amount change command
───────────────────────────────────────────────────── フロントページの続き (72)発明者 永田 勝顕 愛媛県東予市北条962−14 日新製鋼株式 会社東予製造所内 Ｆターム(参考） 4K027 AA02 AA22 AC12 AD25 AE12 AE18 AE33 AE37 4K034 AA01 AA09 AA19 BA04 CA01 CA04 DA06 DB04 DB05 4K038 AA01 BA01 CA01 DA03 EA01 FA03 4K043 AA01 CA00 DA05 EA02 EA04 FA03 FA04 FA12 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Katsuaki Nagata 962-14 Hojo, Toyo City, Ehime Prefecture Nisshin Steel Co., Ltd. Company Toyo Works F term (reference) 4K027 AA02 AA22 AC12 AD25 AE12 AE18 AE33 AE37 4K034 AA01 AA09 AA19 BA04 CA01 CA04 DA06 DB04 DB05 4K038 AA01 BA01 CA01 DA03 EA01 FA03 4K043 AA01 CA00 DA05 EA02 EA04 FA03 FA04 FA12
Claims (1)
イン速度制御機構を経由してプロセスコンピュータのラ
イン制御回路に入力され、ライン速度変更指令に対応す
る操業条件変更処理指令がライン制御回路から板温制御
回路に出力され、板温制御回路において操業条件変更処
理指令に対応する加減速レートを所定周期で繰返し設定
計算し、設定計算結果を加減速レート制御信号としてラ
イン制御回路へ周期的に戻し、ライン制御回路で加減速
レート制御信号に基づいて設定後のライン速度及び燃焼
量を演算し、ライン速度変更指令をライン速度制御機構
に、燃焼量変更指令を炉況変更制御機構に出力すること
を特徴とする連続焼鈍ラインにおけるライン速度の加減
速レート自動設定システム。Claims: 1. A line speed change command is input from an operation panel to a line control circuit of a process computer via a line speed control mechanism, and an operating condition change processing command corresponding to the line speed change command is issued. The line temperature is output from the line control circuit to the sheet temperature control circuit, and the sheet temperature control circuit repeatedly sets and calculates the acceleration / deceleration rate corresponding to the operation condition change processing command at a predetermined cycle, and uses the setting calculation result as an acceleration / deceleration rate control signal as a line control circuit. The line control circuit calculates the set line speed and combustion amount based on the acceleration / deceleration rate control signal.The line speed change command is sent to the line speed control mechanism, and the combustion amount change command is sent to the furnace condition change control. An automatic setting system for acceleration / deceleration rate of line speed in a continuous annealing line characterized by outputting to a mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002026366A JP2003226911A (en) | 2002-02-04 | 2002-02-04 | System for automatically setting acceleration/ deceleration of line speed in continuous annealing line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002026366A JP2003226911A (en) | 2002-02-04 | 2002-02-04 | System for automatically setting acceleration/ deceleration of line speed in continuous annealing line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003226911A true JP2003226911A (en) | 2003-08-15 |
Family
ID=27748227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002026366A Withdrawn JP2003226911A (en) | 2002-02-04 | 2002-02-04 | System for automatically setting acceleration/ deceleration of line speed in continuous annealing line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003226911A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007063641A (en) * | 2005-09-01 | 2007-03-15 | Nippon Steel Corp | Method and apparatus for controlling speed in continuous heat treatment facility, and computer program |
| JP2010090455A (en) * | 2008-10-09 | 2010-04-22 | Nippon Steel Corp | Method, apparatus and program for controlling speed in continuous heat-treatment facility |
| CN104451118A (en) * | 2014-10-27 | 2015-03-25 | 燕山大学 | Forecasting method for segmental evolution of strip steel shape in continuous annealing process |
| CN104962727A (en) * | 2015-07-29 | 2015-10-07 | 上海宝钢节能环保技术有限公司 | Continuous annealing furnace heating section furnace-temperature control system and method |
| CN105986116A (en) * | 2015-02-13 | 2016-10-05 | 鞍钢股份有限公司 | Method for controlling deviation of strip steel in continuous annealing furnace |
-
2002
- 2002-02-04 JP JP2002026366A patent/JP2003226911A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007063641A (en) * | 2005-09-01 | 2007-03-15 | Nippon Steel Corp | Method and apparatus for controlling speed in continuous heat treatment facility, and computer program |
| JP2010090455A (en) * | 2008-10-09 | 2010-04-22 | Nippon Steel Corp | Method, apparatus and program for controlling speed in continuous heat-treatment facility |
| CN104451118A (en) * | 2014-10-27 | 2015-03-25 | 燕山大学 | Forecasting method for segmental evolution of strip steel shape in continuous annealing process |
| CN105986116A (en) * | 2015-02-13 | 2016-10-05 | 鞍钢股份有限公司 | Method for controlling deviation of strip steel in continuous annealing furnace |
| CN104962727A (en) * | 2015-07-29 | 2015-10-07 | 上海宝钢节能环保技术有限公司 | Continuous annealing furnace heating section furnace-temperature control system and method |
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