JPH10102152A - Method for automatically setting temperature in continuous annealing furnace and device therefor - Google Patents
Method for automatically setting temperature in continuous annealing furnace and device thereforInfo
- Publication number
- JPH10102152A JPH10102152A JP25418996A JP25418996A JPH10102152A JP H10102152 A JPH10102152 A JP H10102152A JP 25418996 A JP25418996 A JP 25418996A JP 25418996 A JP25418996 A JP 25418996A JP H10102152 A JPH10102152 A JP H10102152A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- annealing
- temp
- furnace temperature
- line
- 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
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- Control Of Heat Treatment Processes (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、連続焼鈍炉の炉温
自動設定方法及び装置に係り、特に、ステンレス鋼板等
の製造に用いるのに好適な、ライントラブル等による急
減速時に生じる焼鈍不良を激減させることが可能な、連
続焼鈍炉の炉温自動設定方法及び装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for automatically setting a furnace temperature of a continuous annealing furnace. The present invention relates to a method and an apparatus for automatically setting a furnace temperature of a continuous annealing furnace that can be drastically reduced.
【０００２】[0002]
【従来の技術】一般に、連続焼鈍炉の炉温は、炉温とラ
イン速度によって決められた適正焼鈍範囲に入るよう、
炉温とライン速度を関連付けて設定されている。2. Description of the Related Art Generally, the furnace temperature of a continuous annealing furnace is set so as to fall within an appropriate annealing range determined by the furnace temperature and the line speed.
The furnace temperature is set in association with the line speed.
【０００３】通常は、一定の設定炉温に対して、通過体
積に相当する板厚Ｔとライン速度Ｖの積（ＴＶ値と称す
る）が一定となるようにライン速度Ｖが変更される。即
ち、板厚Ｔが厚くなればライン速度Ｖを下げ、逆に板厚
Ｔが薄くなればライン速度Ｖを上げる。Normally, the line speed V is changed so that the product of the plate thickness T corresponding to the passing volume and the line speed V (referred to as TV value) becomes constant for a fixed set furnace temperature. That is, the line speed V is decreased when the plate thickness T is increased, and the line speed V is increased when the plate thickness T is decreased.
【０００４】一方、ライントラブル等でライン速度を大
きく下げざるを得ない場合は、ライン速度だけでなく、
炉内温度も下げる必要がある。On the other hand, when the line speed has to be greatly reduced due to a line trouble or the like, not only the line speed but also
It is necessary to lower the furnace temperature.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、従来
は、ライントラブル時に、まずライン速度を下げ、次い
で、それに見合うように手作業で炉温を下げていたた
め、過焼鈍が発生してしまっていた。However, in the past, in the event of a line trouble, the line speed was first lowered, and then the furnace temperature was lowered manually to match the line speed, resulting in over-annealing.
【０００６】本発明は、前記従来の問題点を解決するべ
くなされたもので、ライン速度変更時の制御性を向上し
て、ライントラブル時等の焼鈍不良の発生を防止するこ
とを課題とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is an object of the present invention to improve the controllability at the time of changing the line speed and to prevent the occurrence of annealing failure at the time of line trouble or the like. .
【０００７】[0007]
【課題を解決するための手段】本発明は、連続焼鈍炉の
炉温設定に際して、炉温とライン速度によって決まる適
正炉温を表わした適正焼鈍領域表を予め作成しておき、
ライン速度変更時に、該適正焼鈍領域表から読み出した
炉温に基づいて、炉温を自動的に設定するようにして、
前記課題を達成したものである。According to the present invention, at the time of setting the furnace temperature of the continuous annealing furnace, an appropriate annealing area table representing an appropriate furnace temperature determined by the furnace temperature and the line speed is prepared in advance.
Upon changing the line speed, the furnace temperature is automatically set based on the furnace temperature read from the appropriate annealing area table,
The above object has been achieved.
【０００８】又、連続焼鈍炉の炉温自動設定装置を、予
め作成された、炉温とライン速度によって決まる適正炉
温を表わした適正焼鈍領域表を記憶する手段と、ライン
速度変更時に、該適正焼鈍領域表から、変更後のライン
速度に対応する炉温を読み出す手段と、読み出された炉
温に基づいて、炉温を自動的に設定する手段とを用いて
構成することにより、同じく前記課題を解決したもので
ある。[0008] In addition, the automatic furnace temperature setting device of the continuous annealing furnace is provided with means for storing an appropriate annealing area table indicating an appropriate furnace temperature determined in advance by the furnace temperature and the line speed. From the appropriate annealing area table, by using a means for reading the furnace temperature corresponding to the line speed after the change, and a means for automatically setting the furnace temperature based on the read furnace temperature, similarly, This has solved the above-mentioned problem.
【０００９】[0009]
【発明の実施の形態】以下図面を参照して、本発明の実
施形態を詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１０】本実施形態の適用対象であるステンレス鋼
板の連続焼鈍ラインには、図１に示す如く、ストリップ
１０を連続的に焼鈍するための、支持ロール２４によっ
てカテナリ状に支持されたストリップ１０を、バーナ２
６によって加熱する焼鈍炉２２が備えられている。２８
は、焼鈍されたストリップ１０を水、空気等で冷却する
冷却帯である。As shown in FIG. 1, a strip 10 supported in a catenary shape by a support roll 24 for continuously annealing the strip 10 is provided on a continuous annealing line of a stainless steel plate to which the present embodiment is applied. , Burner 2
An annealing furnace 22 for heating by 6 is provided. 28
Is a cooling zone for cooling the annealed strip 10 with water, air or the like.
【００１１】この連続焼鈍ラインには、更に、前記焼鈍
炉２２を制御する下位コンピュータである焼鈍炉ＤＤＣ
（Ｄirect Ｄigital Ｃontroller ）３０と、例えば可
変抵抗器で構成されるライン速度設定器３２によってオ
ペレータから与えられる速度指令に基づいて、ライン速
度を制御するための下位コンピュータであるラインＤＤ
Ｃ３４と、これらを統括制御するためのプロセスコンピ
ュータ（Ｐ／Ｃ）３６と、上位コンピュータであるオフ
ィスコンピュータ（Ｏ／Ｃ）３８とが備えられている。The continuous annealing line further includes an annealing furnace DDC which is a lower-level computer for controlling the annealing furnace 22.
(Direct Digital Controller) 30 and a line DD which is a lower-level computer for controlling the line speed based on a speed command given by an operator by a line speed setting device 32 constituted by, for example, a variable resistor.
A C34, a process computer (P / C) 36 for controlling them collectively, and an office computer (O / C) 38 as a host computer are provided.
【００１２】以下、本発明による処理手順について説明
する。Hereinafter, a processing procedure according to the present invention will be described.
【００１３】まず、炉温とライン速度によって決まる適
正炉温を表わした、図２に示すような適正焼鈍領域表
を、実験及び計算によって予め作成し、オフィスコンピ
ュータ３８に登録しておく。図２は、ＳＵＳ３０４に対
する適正焼鈍範囲の例を示したものであり、縦軸は板厚
Ｔとライン速度Ｖの積であるＴＶ値、横軸は、焼鈍炉２
２内の各ゾーン（１ゾーンが入側、８ゾーンが出側）、
表中の数値は適正炉温を示す。図２のような適正焼鈍領
域表を、焼鈍条件の異なる鋼種に対して全て登録してお
く。First, an appropriate annealing area table as shown in FIG. 2 showing an appropriate furnace temperature determined by the furnace temperature and the line speed is created in advance by experiments and calculations and registered in the office computer 38. FIG. 2 shows an example of a proper annealing range for SUS304, in which the vertical axis represents a TV value which is a product of the thickness T and the line speed V, and the horizontal axis represents the annealing furnace 2.
Each zone in 2 (1 zone is on the incoming side, 8 zones is on the outgoing side),
The numerical values in the table indicate the appropriate furnace temperature. The appropriate annealing region table as shown in FIG. 2 is registered for all steel types having different annealing conditions.
【００１４】例えば、図２に示したＳＵＳ３０４の板厚
４ｍｍの鋼帯を焼鈍処理する場合に、ライン速度Ｖを３
０ｍｐｍから２０ｍｐｍに変化させたとする。このとき
ＴＶ値は、１２０（＝４×３０）から８０（＝４×２
０）に変更となる。図２の適正焼鈍領域表より、この場
合適正炉温は、１ゾーン〜４ゾーンで１２００℃から１
０８０℃へ、５ゾーンと６ゾーンで１２００℃から１１
００℃へ、７ゾーンと８ゾーンで１２００℃から１１５
０℃へというように変化する。従って、この図２を用い
て求められる炉温になるように、プロセスコンピュータ
３６がオフィスコンピュータ３８に登録された適正焼鈍
領域表から最適な炉温設定を読み出して、焼鈍炉ＤＤＣ
３０に与える。ＴＶ値が端数となった場合には、近い値
から補間して炉温を決定することにより、精度の良い温
度設定を行うことができる。For example, when annealing a SUS304 steel strip having a thickness of 4 mm shown in FIG.
It is assumed that the value is changed from 0 mpm to 20 mpm. At this time, the TV value is changed from 120 (= 4 × 30) to 80 (= 4 × 2).
0). From the appropriate annealing area table in FIG. 2, the appropriate furnace temperature in this case is from 1200 ° C. to 1 in 1 to 4 zones.
To 080 ° C, 11 from 1200 ° C in 5 and 6 zones
115 ° C from 1200 ° C in 7 and 8 zones to 00 ° C
It changes to 0 ° C and so on. Therefore, the process computer 36 reads the optimum furnace temperature setting from the appropriate annealing area table registered in the office computer 38 so that the furnace temperature obtained by using FIG.
Give 30. When the TV value becomes a fraction, the temperature can be set with high accuracy by determining the furnace temperature by interpolating from a close value.
【００１５】なお、前記説明においては、本発明がＳＵ
Ｓ３０４ステンレス鋼帯に適用されていたが、他のステ
ンレス鋼帯や、ステンレス以外の金属ストリップの連続
焼鈍にも本発明が適用できることは明らかである。In the above description, the present invention relates to the SU
Although applied to the S304 stainless steel strip, it is apparent that the present invention can be applied to other stainless steel strips and continuous annealing of metal strips other than stainless steel.
【００１６】又、本発明は、ライントラブルによる急減
速時に特に有効であるが、他の理由による急減速時や急
加速時にも有効である。Although the present invention is particularly effective at the time of sudden deceleration due to line trouble, it is also effective at the time of sudden deceleration or sudden acceleration for other reasons.
【００１７】[0017]
【実施例】前記実施形態のように、ＳＵＳ３０４につい
て実験したところ、図３に示す如く、焼鈍不良の発生率
が、本発明導入前は０．９％であったのが、本発明導入
後は０．３％になり、１／３に激減することが確認でき
た。EXAMPLE When an experiment was conducted on SUS304 as in the above embodiment, as shown in FIG. 3, the rate of occurrence of annealing defects was 0.9% before the introduction of the present invention. 0.3%, which was confirmed to be drastically reduced to 1/3.
【００１８】[0018]
【発明の効果】本発明においては、ライン速度に応じて
焼鈍炉の設定炉温が自動的に変化するようにしたので、
ライントラブル等の急減速時に生じる焼鈍不良を激減す
ることができる。又、適正焼鈍領域は、外部で計算して
おき、オンラインでの計算は行わないため、上位計算機
の負荷を小さく抑えることができる。According to the present invention, the set furnace temperature of the annealing furnace is automatically changed according to the line speed.
It is possible to drastically reduce annealing defects generated at the time of sudden deceleration such as a line trouble. Further, the appropriate annealing region is calculated externally and is not calculated online, so that the load on the host computer can be reduced.
【図１】本発明の実施形態が適用される連続焼鈍ライン
の構成の一部を示すブロック線図FIG. 1 is a block diagram showing a part of a configuration of a continuous annealing line to which an embodiment of the present invention is applied;
【図２】前記実施形態で用いられている適正焼鈍領域表
の例を示す線図FIG. 2 is a diagram showing an example of a proper annealing area table used in the embodiment.
【図３】本発明導入前後の焼鈍不良発生率の変化の例を
示す線図FIG. 3 is a diagram showing an example of a change in the rate of occurrence of annealing defects before and after the introduction of the present invention.
Ｔ…板厚 Ｖ…ライン速度 １０…ストリップ ２２…焼鈍炉 ３０…焼鈍炉ＤＤＣ ３２…ライン速度設定器 ３４…ラインＤＤＣ ３６…プロセスコンピュータ（Ｐ／Ｃ） ３８…オフィスコンピュータ（Ｏ／Ｃ） T: thickness V: line speed 10: strip 22: annealing furnace 30: annealing furnace DDC 32: line speed setting unit 34: line DDC 36: process computer (P / C) 38: office computer (O / C)
Claims (2)
正焼鈍領域表を予め作成しておき、 ライン速度変更時に、該適正焼鈍領域表から読み出した
炉温に基づいて、炉温を自動的に設定することを特徴と
する連続焼鈍炉の炉温自動設定方法。When the furnace temperature of a continuous annealing furnace is set, an appropriate annealing area table indicating an appropriate furnace temperature determined by the furnace temperature and the line speed is prepared in advance, and when the line speed is changed, the table is read from the appropriate annealing area table. Automatic setting of the furnace temperature of a continuous annealing furnace, wherein the furnace temperature is automatically set based on the furnace temperature.
て決まる適正炉温を表わした適正焼鈍領域表を記憶する
手段と、 ライン速度変更時に、該適正焼鈍領域表から、変更後の
ライン速度に対応する炉温を読み出す手段と、 読み出された炉温に基づいて、炉温を自動的に設定する
手段と、を備えたことを特徴とする連続焼鈍炉の炉温自
動設定装置。2. A means for storing a table of an appropriate annealing area which indicates an appropriate furnace temperature determined by a furnace temperature and a line speed prepared in advance, and when the line speed is changed, the line speed after the change is read from the appropriate annealing area table. An automatic furnace temperature setting device for a continuous annealing furnace, comprising: means for reading a furnace temperature corresponding to the above; and means for automatically setting the furnace temperature based on the read furnace temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25418996A JPH10102152A (en) | 1996-09-26 | 1996-09-26 | Method for automatically setting temperature in continuous annealing furnace and device therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25418996A JPH10102152A (en) | 1996-09-26 | 1996-09-26 | Method for automatically setting temperature in continuous annealing furnace and device therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10102152A true JPH10102152A (en) | 1998-04-21 |
Family
ID=17261483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25418996A Pending JPH10102152A (en) | 1996-09-26 | 1996-09-26 | Method for automatically setting temperature in continuous annealing furnace and device therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10102152A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101150375B1 (en) | 2008-09-30 | 2012-06-11 | 주식회사 에스에이씨 | Bright annealin gfurnace including heating furnace and bright annealing method with the annealing furnace |
| CN108034804A (en) * | 2017-12-08 | 2018-05-15 | 中国地质大学（武汉） | A kind of method and system of continuous annealing unit stove area energy consumption modeling |
| WO2019180961A1 (en) * | 2018-03-23 | 2019-09-26 | Ｐｒｉｍｅｔａｌｓ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｊａｐａｎ株式会社 | Device and method for assisting operation of heat-treating furnace, and heat-treating facility and operation method thereof |
-
1996
- 1996-09-26 JP JP25418996A patent/JPH10102152A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101150375B1 (en) | 2008-09-30 | 2012-06-11 | 주식회사 에스에이씨 | Bright annealin gfurnace including heating furnace and bright annealing method with the annealing furnace |
| CN108034804A (en) * | 2017-12-08 | 2018-05-15 | 中国地质大学（武汉） | A kind of method and system of continuous annealing unit stove area energy consumption modeling |
| CN108034804B (en) * | 2017-12-08 | 2019-04-23 | 中国地质大学（武汉） | A kind of method and system of continuous annealing unit furnace area's energy consumption modeling |
| WO2019180961A1 (en) * | 2018-03-23 | 2019-09-26 | Ｐｒｉｍｅｔａｌｓ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｊａｐａｎ株式会社 | Device and method for assisting operation of heat-treating furnace, and heat-treating facility and operation method thereof |
| JPWO2019180961A1 (en) * | 2018-03-23 | 2021-03-11 | Ｐｒｉｍｅｔａｌｓ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｊａｐａｎ株式会社 | Heat treatment furnace operation support device and operation support method, heat treatment equipment and its operation method |
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