JPH02125852A - Heurtey process device - Google Patents

Heurtey process device

Info

Publication number
JPH02125852A
JPH02125852A JP27932488A JP27932488A JPH02125852A JP H02125852 A JPH02125852 A JP H02125852A JP 27932488 A JP27932488 A JP 27932488A JP 27932488 A JP27932488 A JP 27932488A JP H02125852 A JPH02125852 A JP H02125852A
Authority
JP
Japan
Prior art keywords
blow box
precooler
temp
radiation thermometer
sheet
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
Application number
JP27932488A
Other languages
Japanese (ja)
Inventor
Kenji Inada
賢治 稲田
Hideji Tanaka
秀二 田中
Toru Azuma
亨 東
Kazumi Mori
守 一視
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 JP27932488A priority Critical patent/JPH02125852A/en
Publication of JPH02125852A publication Critical patent/JPH02125852A/en
Pending legal-status Critical Current

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  • Coating With Molten Metal (AREA)

Abstract

PURPOSE:To reduce the load of an operator and to uniformize the surface condition of a zero-spangle material by appropriately setting the position of a blow box and controlling the air volume of a precooler and the position of the blow box so that the indication of a radiation thermometer is made constant. CONSTITUTION:In the HEURTEY process device for producing a zero-spangle material, a steel sheet 11 is passed through a plating bath 2, and the amt. of zinc deposited is adjusted by an injection nozzle 3. The sheet is then passed through the precooler 6 and the blow box 4. The movable blow box 4 for spraying zinc powder is moved by a moving device 5 to hold the sheet 11. The sheet 11 is held by the precooler 6 when the temp. of the sheet 11 is high, and cooled by a cooling blower. The temp. of the radiation thermometer 7 is transduced into a signal of DC4-20mA by a temp. transducer 8, and the signal is inputted to a sequencer 9 and a temp. controller 10. The position of the blow box 4 is controlled by the sequencer 9 through the moving device 5. The opening degree of the damper of the precooler 6 is controlled by the temp. controller 10, and the air volume is adjusted.

Description

【発明の詳細な説明】[Detailed description of the invention]

〔産業上の利用分野〕 本発明はハーティプロセス装置に関する。 ハーティプロセスは、熔融亜鉛メツキ鋼板に特有な亀甲
状の文様(スパングル)の形成を抑制して外観を美しく
したゼロスパングル材の製造を目的として開発されたプ
ロセスである。本発明はこのハーティプロセスの改良に
関するものである。 〔従来の技術〕 ハーティプロセスによるゼロスパングル材の連続製造設
備には、通常の連続溶融亜鉛メツキ鋼板の製造設備に加
えて、ゼロ装置(ハーティプロセス装置)が追加されて
いる。これは鋼板表面に付着した亜鉛が凝固する直前に
表面に亜鉛の粉体を吹き付けるもので、吹き付けられた
亜鉛の粉体が結晶核となって多数の微少スパングルが形
成されるために、良好なゼロスパングル材が製造される
。 このハーティプロセス装置においては、亜鉛の粉体を吹
き付ける時の凝固状態すなわち鋼板表面の温度により、
鋼板の外観状態が左右されるため、これが適正であるこ
とが要求される。連続して供給される鋼板の表面の溶融
亜鉛が凝固する位置は、亜鉛付着量、鋼板の厚さ、幅、
ラインスピード、メツキ浴入側鋼板表面温度、メツキ浴
温度などにより変化する。このように鋼板表面の凝固位
置は複雑に変化するので、従来はオペレータが目視によ
り凝固位置を観測し、凝固位置が適正な範囲内にくる様
に粉体の吹き付は位置を移動調節したり、ラインスピー
ドを変化させたりしていた。 〔発明が解決しようとする課題〕 このような方法で製品の表面状態を一定に制御するため
には、凝固位置の観測を常時行っていなければならず、
オペレータにとって負荷が非常に大きいという問題があ
る。 したがって本発明の目的は、ゼロスパングル材の表面状
態を一定に制御することを可能にしつつ、オペレータの
負荷を低減することが可能なハーティプロセス装置を提
供することにある。 〔課題を解決するための手段〕 以上の目的に鑑みて創出された本発明のバーチィプロセ
ス装置は、溶融亜鉛で被覆された鋼板に亜鉛粉体を吹き
付けるためのブローボックスと、該ブローボックスを移
動させる移動装置と、該鋼板の該ブローボックス付近の
表面温度を測定する放射温度計とを具備するハーティプ
ロセス装置において、該鋼板の表面温度を下げるために
該鋼板の表面に風を吹きつけるプレクーラと、該放射温
度計の指示を一定にすべく該移動装置を制御するシーケ
ンサと、該指示を一定にすべく該プレクーラの風量を制
御する温度調節計を具備することを特徴とするものであ
る。
[Industrial Field of Application] The present invention relates to a Hearty process device. The Hearty process was developed for the purpose of producing zero-spangle material with a beautiful appearance by suppressing the formation of spangles, which are characteristic of hot-dip galvanized steel sheets. The present invention relates to improvements to this Harty process. [Prior Art] Zero equipment (Hearty process equipment) is added to the continuous manufacturing equipment for zero spangle materials using the Hearty process, in addition to the usual manufacturing equipment for continuous hot-dip galvanized steel sheets. This involves spraying zinc powder onto the surface of the steel sheet just before the zinc adheres to the surface solidifies.The sprayed zinc powder becomes crystal nuclei and forms many minute spangles, resulting in a good condition. Zero spangle material is produced. In this Hearty process equipment, depending on the solidification state, that is, the temperature of the steel plate surface when zinc powder is sprayed,
This is required to be appropriate since it affects the appearance of the steel plate. The position where molten zinc solidifies on the surface of the continuously supplied steel sheet depends on the amount of zinc coating, the thickness and width of the steel sheet,
It varies depending on line speed, surface temperature of the steel plate on the plating bath side, plating bath temperature, etc. As the solidification position on the steel plate surface changes in a complicated manner, conventionally the operator visually observed the solidification position and adjusted the position of the powder spray so that the solidification position was within the appropriate range. , and changing the line speed. [Problem to be solved by the invention] In order to control the surface condition of the product to a constant level using this method, it is necessary to constantly observe the solidification position.
There is a problem in that the load on the operator is very heavy. Therefore, an object of the present invention is to provide a Hearty process device that can reduce the burden on the operator while making it possible to control the surface condition of the zero spangle material at a constant level. [Means for Solving the Problems] The Birch process device of the present invention, created in view of the above objects, includes a blow box for spraying zinc powder onto a steel plate coated with molten zinc, and a blow box for spraying zinc powder onto a steel plate coated with molten zinc. A pre-cooler that blows wind onto the surface of the steel plate in order to lower the surface temperature of the steel plate, in a Hearty process device that includes a moving device for moving the steel plate and a radiation thermometer that measures the surface temperature of the steel plate near the blow box. and a sequencer that controls the moving device to keep the indication of the radiation thermometer constant; and a temperature controller that controls the air volume of the precooler to keep the indication constant. .

【作 用】[For use]

設備の運転開始時においては、従来の方法に基づいて目
視により凝固位置を確認してブローボックスの位置を適
切に設定し、その後は放射温度計の出力の値がその時の
値になるようにプレクーラの風量とブローボックスの位
置を制御することによって、オペレータが常時観測する
必要なしに品質を一定に保つことができる。また、放射
温度計の出力を実際の温度に変換するためには、放射率
の補正が必要であり、この放射率も同様に亜鉛付着量等
の要因で変化するが、放射温度計の出力を一定に保つこ
とでこの影響は除かれる。 〔実施例〕 第1図は本発明に係るハーティプロセス装置の一実施例
を含むゼロスパングル材製造設備を表す図である。図に
おいて、焼鈍炉1で焼鈍された鋼@11はメツキ浴2内
を通過した後、噴射ノズル3にて亜鉛付着量が調整され
る。次に、鋼板11はプレクーラ6、ブローボックス4
内を通過する。 亜鉛粉末を吹きつけるためのブローボックス4は、移動
装置5によって上下方向及び鋼板幅方向に移動可能で鋼
板をはさむようにして装入される。また、プレクーラ6
は、鋼板温度が高い場合、移動し、鋼板をはさみ、冷却
プロワ−にて冷却することを目的とする。放射温度計7
はブローボックス4上部に設置され、温度変換器8で、
DC4〜20mAの信号に変換された後、シーケンサ−
9及び温度調節計10に入力される。シーケンサ9は移
動装置5を介して、ブローボックス4の位置を制御し、
温度調節計10はプレクーラ6のダンパの開度を制御し
て風量を調節する。 次に第1図の装置の運転方法を説明する。まず、手動モ
ードにおいてブローボックス4が制御範囲の中央付近に
くる様に移動装置5を設定し、ブローボックス4の最適
位置がこの位置になる様に各部の温度を調節する。この
調整が完了したら、自動運転に入るわけであるが、その
方式には3通りのモードがある。 第1のモードはシーケンサ9によるブローボックス4の
位置の制御と温度調節計10によるプレクーラ6の制御
を併用するモードである。温度調節計10は公知の制御
方式に基づいてプレクーラ10のファンダンパの開度を
調節することにより放射温度計7からの指示が設定され
た値になる様に制御を行う。一方、シーケンサ9の側は
ファンダンパの開度をモニタし、それが全開または全開
になるまではブローボックス4の位置の制御は何ら行わ
ず、全閉または全開になった時のみブローボックス上下
の制御を行う。第2図に、その制御フローチャートを示
す。図において、ダンパが全開(ステップa)でも全閉
(ステップb)でもない時、ブローボックス4に関して
は何らの制御も行わない。ダンパが全開か全閉であれば
、ブローボックス4が上限位置(ステップC)であるか
あるいは下限位置(ステップd)であるかの判定を行い
、そのいずれかであれば警報を出力して(ステップf)
、制御を停止する。上、下限のいずれでもなければ公知
の制御方式に基づいてブローボックス4の位置を上下す
ることにより放射温度計7の指示が設定値になるような
制御を行う(ステップe)。 第2のモードでは、ブローボックス4の位置は変えず温
度調節計10によるダンパ開度の制御のみで放射温度計
7の指示を一定に保つ。 第3のモードでは、ダンパ開度は変えず、シーケンサ9
によるブローボックス4の位置の制御のみで放射温度計
7の指示を一定に保つ制御を行う。 〔発明の効果〕 以上述べてきたように本発明によれば、ゼロスパングル
材製造設備において、製品の品質を低下させることなく
、オペレータの負荷を低減することが可能となる。
When the equipment starts operating, the position of the blow box is set appropriately by visually checking the solidification position based on the conventional method, and then the precooler is set so that the output value of the radiation thermometer is the value at that time. By controlling the air volume and the position of the blowbox, quality can be maintained constant without the need for constant operator observation. In addition, in order to convert the output of the radiation thermometer into the actual temperature, it is necessary to correct the emissivity, and this emissivity also changes depending on factors such as the amount of zinc deposited, but the output of the radiation thermometer is This effect can be removed by keeping it constant. [Embodiment] FIG. 1 is a diagram showing a zero spangle material manufacturing facility including an embodiment of the Hearty process apparatus according to the present invention. In the figure, steel @11 annealed in an annealing furnace 1 passes through a plating bath 2, and then the amount of zinc deposited is adjusted by an injection nozzle 3. Next, the steel plate 11 is placed in the precooler 6 and the blow box 4.
pass through the inside. A blow box 4 for spraying zinc powder is movable in the vertical direction and the width direction of the steel plate by a moving device 5, and is inserted so as to sandwich the steel plate. Also, precooler 6
The purpose of this is to move, sandwich the steel plate, and cool it with a cooling blower when the steel plate temperature is high. Radiation thermometer 7
is installed on the top of the blow box 4, and is a temperature converter 8,
After being converted to a DC4~20mA signal, the sequencer
9 and a temperature controller 10. The sequencer 9 controls the position of the blow box 4 via the moving device 5,
The temperature controller 10 controls the opening degree of the damper of the precooler 6 to adjust the air volume. Next, a method of operating the apparatus shown in FIG. 1 will be explained. First, in manual mode, the moving device 5 is set so that the blow box 4 is located near the center of the control range, and the temperature of each part is adjusted so that the optimum position of the blow box 4 is at this position. Once this adjustment is complete, the vehicle enters automatic operation, which has three modes. The first mode is a mode in which the position of the blow box 4 is controlled by the sequencer 9 and the precooler 6 is controlled by the temperature controller 10. The temperature controller 10 performs control so that the instruction from the radiation thermometer 7 reaches a set value by adjusting the opening degree of the fan damper of the precooler 10 based on a known control method. On the other hand, the sequencer 9 side monitors the opening degree of the fan damper, does not control the position of the blow box 4 at all until it is fully open or fully open, and only when it is fully closed or fully open does it move the top and bottom of the blow box. Take control. FIG. 2 shows the control flowchart. In the figure, when the damper is neither fully open (step a) nor fully closed (step b), no control is performed on the blow box 4. If the damper is fully open or fully closed, it is determined whether the blow box 4 is at the upper limit position (step C) or the lower limit position (step d), and if either is the case, an alarm is output ( Step f)
, stop control. If neither the upper limit nor the lower limit is reached, control is performed so that the indication of the radiation thermometer 7 reaches the set value by moving the position of the blow box 4 up or down based on a known control method (step e). In the second mode, the position of the blow box 4 is not changed, and the indication of the radiation thermometer 7 is kept constant only by controlling the damper opening degree using the temperature controller 10. In the third mode, the damper opening degree remains unchanged and the sequencer 9
Control is performed to keep the indication of the radiation thermometer 7 constant only by controlling the position of the blow box 4. [Effects of the Invention] As described above, according to the present invention, it is possible to reduce the burden on the operator in a zero-spangle material manufacturing facility without degrading the quality of the product.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明に係るハーティプロセス装置の一実施例
を含むゼロスパングル材製造設備を表す図。第2図はプ
レクーラの制御とブローボックス位置の制御を併用する
制御モードにおけるシーケンサの制御フローチャート。 図において、 4・・・ブローボックス、  訃・・昇降装置、6・・
・プレクーラ、     7・・・放射温度計、訃・・
温度変換器、     9・・・シーケンサ、10・・
・温度調節計。 第1の制御モー白こむけるシ 第 ケンサの制御フローチャート 図
FIG. 1 is a diagram showing a zero spangle material manufacturing facility including an embodiment of the Hearty process device according to the present invention. FIG. 2 is a control flowchart of the sequencer in a control mode that uses both precooler control and blowbox position control. In the figure, 4... Blow box, Lifting device, 6...
・Pre-cooler, 7... Radiation thermometer, Death...
Temperature converter, 9...Sequencer, 10...
·Temperature Controller. Control flowchart of the first control mode and the first controller

Claims (1)

【特許請求の範囲】 1、溶融亜鉛で被覆された鋼板(11)に亜鉛粉体を吹
き付けるためのブローボックス(4)と、該ブローボッ
クス(4)を移動させる移動装置(5)と、該鋼板(1
1)の該ブローボックス(4)付近の表面温度を測定す
る放射温度計(7)とを具備するハーティプロセス装置
において、 該鋼板(11)の表面温度を下げるために該鋼板(11
)の表面に風を吹きつけるプレクーラ(6)と、該放射
温度計(7)の指示を一定にすべく該移動装置(5)を
制御するシーケンサ(9)と、該指示を一定にすべく該
プレクーラ(6)の風量を制御する温度調節計(10)
とを具備することを特徴とするハーティプロセス装置。
[Claims] 1. A blow box (4) for spraying zinc powder onto a steel plate (11) coated with molten zinc, a moving device (5) for moving the blow box (4), and a moving device (5) for moving the blow box (4). Steel plate (1
In the Hearty process equipment equipped with a radiation thermometer (7) for measuring the surface temperature near the blow box (4) of 1), the steel plate (11) is used to lower the surface temperature of the steel plate (11).
); a pre-cooler (6) that blows air onto the surface of the radiation thermometer (7); a sequencer (9) that controls the moving device (5) to keep the indication of the radiation thermometer (7) constant; A temperature controller (10) that controls the air volume of the precooler (6)
A Hearty process device comprising:
JP27932488A 1988-11-07 1988-11-07 Heurtey process device Pending JPH02125852A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27932488A JPH02125852A (en) 1988-11-07 1988-11-07 Heurtey process device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27932488A JPH02125852A (en) 1988-11-07 1988-11-07 Heurtey process device

Publications (1)

Publication Number Publication Date
JPH02125852A true JPH02125852A (en) 1990-05-14

Family

ID=17609588

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27932488A Pending JPH02125852A (en) 1988-11-07 1988-11-07 Heurtey process device

Country Status (1)

Country Link
JP (1) JPH02125852A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100370558B1 (en) * 2000-11-25 2003-01-30 주식회사 포스코 Cooling method of pre-cooler for automatic cooling strip and thereof apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6115956A (en) * 1984-06-22 1986-01-24 ユニオン・シリデユルジク・デユ・ノール・エ・ド・レス・ド・ラ・フランス・パル・アブルビエーシヨン・“ユジノル” Method and apparatus for diminishing crystal size of zinc-plated steel sheet

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6115956A (en) * 1984-06-22 1986-01-24 ユニオン・シリデユルジク・デユ・ノール・エ・ド・レス・ド・ラ・フランス・パル・アブルビエーシヨン・“ユジノル” Method and apparatus for diminishing crystal size of zinc-plated steel sheet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100370558B1 (en) * 2000-11-25 2003-01-30 주식회사 포스코 Cooling method of pre-cooler for automatic cooling strip and thereof apparatus

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