JPH1046309A - Method for controlling plating weight and device therefor - Google Patents

Method for controlling plating weight and device therefor

Info

Publication number
JPH1046309A
JPH1046309A JP21656396A JP21656396A JPH1046309A JP H1046309 A JPH1046309 A JP H1046309A JP 21656396 A JP21656396 A JP 21656396A JP 21656396 A JP21656396 A JP 21656396A JP H1046309 A JPH1046309 A JP H1046309A
Authority
JP
Japan
Prior art keywords
steel strip
arc shape
electromagnet
restraining means
plating
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Withdrawn
Application number
JP21656396A
Other languages
Japanese (ja)
Inventor
Atsushi Kurobe
淳 黒部
Tatsuhiro Den
達博 傳
Shigeo Matsubara
茂雄 松原
Kazunari Nakamoto
一成 中本
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 Nisshin Co Ltd
Original Assignee
Nisshin Steel Co Ltd
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 Nisshin Steel Co Ltd filed Critical Nisshin Steel Co Ltd
Priority to JP21656396A priority Critical patent/JPH1046309A/en
Publication of JPH1046309A publication Critical patent/JPH1046309A/en
Withdrawn legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To suppress vibration and camber in the width direction of a running steel strip by bending the steel strip right after adjusting coating weight thereon in a circular-arc shape and an inverted circular-arc shape by electromagnetic force and thereby to obtain a plated steel strip having uniform plating weight in the width direction and in a longitudinal direction. SOLUTION: Excess hot-dip coating metal on a steel strip surface is flowed down by a wiping device (moving magnetic field generating coils 4R, 4L) arranged at both sides of the travelling track of the steel strip 3 pulled up from a plating bath 2. After the steel strip is elastically deformed in the circular-arc shape by lower magnetic binding means 5R, 5L arranged above the wiping device, the steel strip 3 is elastically deformed in the inverted circular-arc shape by upper magnetic binding means 6R, 6L. Position of the running steel strip 3 is detected by a position sensor and currents supplied to the magnetic binding means 5R, 5L, 6R, 6L are controlled corresponding to deviation between a reference position and a detected position.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、めっき付着量を制御す
る際に鋼帯の走行状態を制御してめっき付着量を均一化
する方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the running state of a steel strip when controlling the amount of plating to make the amount of plating uniform.

【0002】[0002]

【従来の技術】溶融めっき浴から引き上げられた鋼帯に
付着している過剰な溶融めっき金属を除去し、めっき付
着量を調整する手段としてガスワイピングが汎用されて
いる。ガスワイピングでは、鋼帯の幅方向に沿って配列
されるガスノズルを多段に配置し、めっき浴から引き上
げられた直後の鋼帯表面に高圧ガスを吹き付け、ガスの
噴射圧によってめっき付着量を調整している。めっき浴
から引き上げられた鋼帯は、走行中に振動しているの
で、ガスノズルと鋼帯表面との間隔が不規則的に変化す
る。そのため、ガス衝突圧の変動が避けられず、結果と
して鋼帯の長手方向に関してめっき付着量が不均一にな
り易い。また、めっき浴から引き上げられた鋼帯は幅方
向に湾曲した形状になっている。この幅反りは、ガスノ
ズルと鋼帯表面との距離を変動させ、鋼帯の幅方向に関
してめっき付着量を不均一化する原因となる。
2. Description of the Related Art Gas wiping is widely used as a means for removing excess hot-dip metal deposited on a steel strip pulled up from a hot-dip plating bath and adjusting the amount of coating. In gas wiping, gas nozzles arranged along the width direction of the steel strip are arranged in multiple stages, high-pressure gas is sprayed on the steel strip surface immediately after being lifted from the plating bath, and the amount of plating applied is adjusted by the gas injection pressure. ing. Since the steel strip pulled up from the plating bath vibrates during traveling, the distance between the gas nozzle and the steel strip surface changes irregularly. Therefore, the fluctuation of the gas collision pressure is unavoidable, and as a result, the coating amount tends to be uneven in the longitudinal direction of the steel strip. Further, the steel strip pulled up from the plating bath has a shape curved in the width direction. This warpage causes the distance between the gas nozzle and the surface of the steel strip to fluctuate, causing unevenness in the amount of plating applied in the width direction of the steel strip.

【0003】そこで、特開平7−102354号公報で
は、鋼帯の走行ラインを円弧状に曲げるように、鋼帯の
両側に設けた静圧パッドの気体噴射ノズルから高圧ガス
を吹き付けている。この方法では、高圧ガスによって鋼
帯が所定走行ラインに沿って保持されるため鋼帯の振動
が抑制され、また円弧状に曲がっていることから幅方向
の剛性が増して幅反りが矯正され、結果として長手方向
及び幅方向に関するめっき付着量の不均一化が解消され
るとしている。しかし、鋼帯を円弧状に曲げるために
は、非常に高圧のガス圧が必要とされる。鋼帯表面に高
圧ガスが衝突すると、大きな衝撃音が発生し、騒音によ
り作業に支障がきたされる環境となる。
Therefore, in Japanese Patent Application Laid-Open No. 7-102354, high-pressure gas is blown from gas injection nozzles of static pressure pads provided on both sides of the steel strip so as to bend the running line of the steel strip in an arc shape. In this method, the steel strip is held along the predetermined traveling line by the high-pressure gas, so that the vibration of the steel strip is suppressed, and since the steel strip is bent in an arc shape, the rigidity in the width direction is increased and the width warpage is corrected, As a result, the nonuniformity of the plating amount in the longitudinal direction and the width direction is eliminated. However, in order to bend the steel strip into an arc shape, a very high gas pressure is required. When the high-pressure gas collides with the steel strip surface, a loud impact sound is generated, and an environment is created in which the work is hindered by the noise.

【0004】[0004]

【発明が解決しようとする課題】騒音の大きなガスワイ
ピングに代わるめっき付着量制御手段として、電磁力を
使用した方法が特開昭51−63322号公報で提案さ
れている。この方法では、めっき浴から引き上げられる
鋼帯の走行ラインの両側に電磁コイルを配置し、発生し
た移動磁界で鋼帯に下向きの電磁力を付与する。鋼帯表
面にある過剰のめっき金属は、この電磁力によって搾り
取られて下方に流動し、めっき浴に返送される。過剰の
溶融めっき金属を鋼帯表面から除去するためには、電磁
コイルと鋼帯表面に可能な限り近接配置し、大きな電磁
力を発生させることが必要となる。
A method using an electromagnetic force has been proposed in Japanese Patent Application Laid-Open No. Sho 63-63222 as a means for controlling the amount of coating applied instead of gas wiping which produces a large amount of noise. In this method, electromagnetic coils are arranged on both sides of a running line of a steel strip pulled up from a plating bath, and a downward electromagnetic force is applied to the steel strip by the generated moving magnetic field. Excess plating metal on the surface of the steel strip is squeezed out by this electromagnetic force, flows downward, and is returned to the plating bath. In order to remove excess hot-dip galvanized metal from the steel strip surface, it is necessary to arrange the electromagnetic coil and the steel strip surface as close as possible to generate a large electromagnetic force.

【0005】しかし、電磁力でめっき付着量を制御する
場合、鋼帯に磁気吸引力が作用し、近い方の電磁石に鋼
帯が吸引され易い。その結果、正規の走行ラインからず
れた鋼帯が周辺機器に接触し、めっき層に表面疵を発生
させる原因となる。また、めっき浴から引き上げられた
鋼帯に幅反りがあると、鋼帯に作用する電磁力が板幅方
向に関して異なり、めっき付着量が板幅方向に変動する
原因となる。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、めっき付着量を制御する際に鋼帯
の走行軌跡を電磁力で拘束することにより、鋼帯の振動
及び幅反りを抑制し、鋼帯の長手方向及び幅方向に関し
てめっき付着量が均一なめっき鋼板を静かな作業環境で
製造することを目的とする。
However, when the amount of plating is controlled by an electromagnetic force, a magnetic attraction force acts on the steel strip, and the steel strip is easily attracted to the closer electromagnet. As a result, the steel strip deviated from the regular traveling line comes into contact with peripheral equipment, which causes a surface flaw on the plating layer. Also, if the steel strip pulled up from the plating bath has a width warp, the electromagnetic force acting on the steel strip differs in the plate width direction, which causes the plating amount to fluctuate in the plate width direction. The present invention has been devised to solve such a problem. When controlling the amount of plating, the traveling trajectory of the steel strip is restrained by an electromagnetic force, so that the vibration and the warpage of the steel strip can be reduced. An object of the present invention is to produce a plated steel sheet having a uniform coating weight in a longitudinal direction and a width direction of a steel strip in a quiet working environment.

【0006】[0006]

【課題を解決するための手段】本発明のめっき付着量制
御方法は、その目的を達成するため、めっき浴から引き
上げられた鋼帯の走行軌跡の両側に配置されたワイピン
グ装置で鋼帯表面にある過剰の溶融めっき金属を流下さ
せ、ワイピング装置の上方に配置された下側磁気拘束手
段で鋼帯を一面側に円弧状に弾性変形させた後、上側磁
気拘束手段で鋼帯を他面側に円弧状に弾性変形させるこ
とを特徴とする。磁気拘束手段に供給する電流は、走行
している鋼帯の位置を位置センサーで検出し、基準位置
から測定位置のズレに応じて制御されることが好まし
い。
According to the present invention, there is provided a method for controlling a coating weight of a coated steel sheet, in order to achieve the object, by applying a wiping device disposed on both sides of a traveling locus of a steel strip pulled up from a plating bath to a surface of the steel strip. After a certain excess hot-dip metal is flowed down, the steel strip is elastically deformed in an arc shape on one side by a lower magnetic restraining means arranged above the wiping device, and then the steel strip is deformed on the other side by an upper magnetic restraining means. And elastically deformed in an arc shape. It is preferable that the current supplied to the magnetic restraining means be controlled in accordance with the deviation of the measurement position from the reference position by detecting the position of the running steel strip with a position sensor.

【0007】また、めっき付着量制御装置は、めっき浴
から引き上げられた鋼帯の走行軌跡の両側に配置された
一対のワイピング装置と、ワイピング装置の上方に配置
され、鋼帯を一面側に円弧状に弾性変形させる円筒状電
磁石と凹面状電磁石をもつ下側磁気拘束手段と、ワイピ
ング装置の上方に配置され、鋼帯を他面側に円弧状に弾
性変形させる円筒状電磁石と凹面状電磁石をもつ上側磁
気拘束手段とを備えている。拘束用電磁石に供給する電
流を調整する手段としては、走行している鋼帯の位置を
検出する位置センサーを鋼帯の両側に配置し、位置セン
サーで検出された鋼帯の測定位置が入力される制御機構
を介して位置センサーを磁気拘束手段に接続する方式が
採用される。
[0007] The coating weight control device includes a pair of wiping devices disposed on both sides of a traveling locus of the steel strip pulled up from the plating bath, and a wiping device disposed above the wiping device. A lower magnetic restraining means having a cylindrical electromagnet and a concave electromagnet for elastic deformation in an arc shape, and a cylindrical electromagnet and a concave electromagnet disposed above the wiping device and elastically deforming the steel strip to the other surface in an arc shape. And upper magnetic restraint means. As means for adjusting the current supplied to the restraining electromagnet, position sensors for detecting the position of the running steel strip are arranged on both sides of the steel strip, and the measurement position of the steel strip detected by the position sensor is input. In this case, a position sensor is connected to the magnetic restraining means via a control mechanism.

【0008】[0008]

【実施の形態】本発明に従っためっき付着量制御装置
は、図1に示すように、シンクロール1を周回してめっ
き浴2から引き上げられる鋼帯3の両側に一対の移動磁
場発生コイル4R,4Lを配置している。図1ではワイ
ピング装置として移動磁場発生コイルを採用している
が、本発明はこれに拘束されるものではなく、ガスワイ
ピング装置を使用することもできる。移動磁場発生コイ
ル4R,4Lは、鋼帯3に渦電流を発生させ、鋼帯3の
表面にある溶融状態のめっき金属に下向きの電磁力を加
える。これにより、鋼帯3の表面から過剰のめっき金属
が除去され、めっき付着量が制御される。移動磁場発生
コイル4R,4Lの上方には、一対の電磁石5R,5L
をもつ下側磁気拘束手段が配置されている。各電磁石5
R,5Lは、鋼帯3の板幅方向に沿って複数個配置する
ことが好ましい。電磁石5Lは円筒状で、電磁石5Rは
電磁石5Lの円筒面と等距離になる凹面をもっている。
鋼帯3は、電磁石5Rと5Lとの間を通過するとき、磁
力によって電磁石5Lの円筒面に対応する形状に湾曲す
る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a coating weight control apparatus according to the present invention comprises a pair of moving magnetic field generating coils 4R on both sides of a steel strip 3 which is pulled up from a plating bath 2 around a sink roll 1. , 4L. Although a moving magnetic field generating coil is employed as the wiping device in FIG. 1, the present invention is not limited to this, and a gas wiping device may be used. The moving magnetic field generating coils 4R and 4L generate an eddy current in the steel strip 3 and apply a downward electromagnetic force to the molten plated metal on the surface of the steel strip 3. This removes excess plating metal from the surface of the steel strip 3 and controls the amount of plating applied. A pair of electromagnets 5R, 5L are provided above the moving magnetic field generating coils 4R, 4L.
Is disposed. Each electromagnet 5
It is preferable that a plurality of R and 5L are arranged along the width direction of the steel strip 3. The electromagnet 5L has a cylindrical shape, and the electromagnet 5R has a concave surface that is equidistant from the cylindrical surface of the electromagnet 5L.
When the steel strip 3 passes between the electromagnets 5R and 5L, it is bent by a magnetic force into a shape corresponding to the cylindrical surface of the electromagnet 5L.

【0009】電磁石5R,5Lの上方には、一対の電磁
石6R,6Lをもつ上側磁気拘束手段が配置されてい
る。各電磁石6R,6Lも、鋼帯3の板幅方向に沿って
複数個配置することが好ましい。電磁石6Rは円筒状
で、電磁石6Lは電磁石6Rの円筒面と等距離になる凹
面をもっている。鋼帯3は、電磁石6Rと6Lとの間を
通過するとき、磁力によって電磁石6Rの円筒面に対応
する形状に湾曲する。このように鋼帯3を円弧状に曲げ
た後、逆円弧状に曲げるとき、磁力による鋼帯3の拘束
が確実になる。そのため、シンクロール1との間で所定
の張力を鋼帯3に加えることができ、鋼帯3の走行状態
が安定化する。また、下側磁気拘束手段5R,5Lで
は、コイルの吸着を防止すると共に、幅反りを矯正す
る。上側磁気拘束手段6R,6Lでは、鋼帯3を正規の
走行ラインに戻す。
Above the electromagnets 5R, 5L, an upper magnetic restraining means having a pair of electromagnets 6R, 6L is arranged. Preferably, a plurality of electromagnets 6R and 6L are also arranged along the width direction of the steel strip 3. The electromagnet 6R has a cylindrical shape, and the electromagnet 6L has a concave surface equidistant from the cylindrical surface of the electromagnet 6R. When the steel strip 3 passes between the electromagnets 6R and 6L, the steel strip 3 is bent by a magnetic force into a shape corresponding to the cylindrical surface of the electromagnet 6R. When the steel strip 3 is bent in an arc shape after being bent in an arc shape in this manner, the steel band 3 is reliably restrained by magnetic force. Therefore, a predetermined tension can be applied to the steel strip 3 with the sink roll 1, and the running state of the steel strip 3 is stabilized. Further, the lower magnetic restraining means 5R and 5L prevent the coil from being attracted and correct the width warpage. In the upper magnetic restraining means 6R, 6L, the steel strip 3 is returned to the normal running line.

【0010】電磁力を効率よく作用させるためには、磁
気拘束手段を鋼帯3の表面に可能な限り接近させる。こ
の場合、鋼帯3が正規の走行ラインからずれると、近い
方の電磁石による電磁力が大きく作用するため、その電
磁石に鋼帯3が吸引される虞れがある。この吸引は、正
規の走行ラインからずれた鋼帯3の変位量に応じて電磁
力を調整することにより防止される。具体的には、図2
に示すように位置センサー7を電磁石5Rに組み込む。
なお、図2では、下側磁気拘束手段の片方の電磁石5R
だけを示しているが、他方の電磁石5L及び上側電磁石
6R,6Lにも同様な位置センサー7を組み込むことが
できる。位置センサー7は、図2のように電磁石5Rと
一体化することなく電磁石5Rと5Lとの間を通過する
鋼帯3の位置を検出できる限り、電磁石5Rから独立し
て設けることができる。
In order to make the electromagnetic force act efficiently, the magnetic restraining means is brought as close as possible to the surface of the steel strip 3. In this case, if the steel strip 3 deviates from the regular traveling line, the electromagnetic force of the closer electromagnet acts greatly, and the steel strip 3 may be attracted to the electromagnet. This suction is prevented by adjusting the electromagnetic force according to the amount of displacement of the steel strip 3 deviating from the normal traveling line. Specifically, FIG.
The position sensor 7 is incorporated in the electromagnet 5R as shown in FIG.
In FIG. 2, one electromagnet 5R of the lower magnetic restraining means is used.
However, a similar position sensor 7 can be incorporated in the other electromagnet 5L and the upper electromagnets 6R and 6L. The position sensor 7 can be provided independently of the electromagnet 5R as long as the position sensor 7 can detect the position of the steel strip 3 passing between the electromagnets 5R and 5L without being integrated with the electromagnet 5R as shown in FIG.

【0011】走行している鋼帯3の位置を位置センサー
7で検出し、測定位置を示す信号8として制御機構9に
入力する。制御機構9には、鋼帯3の基準位置を示す信
号10が予め入力されており、測定位置信号8と基準位
置信号10とを比較して、正規の走行ラインからずれて
いる鋼帯3の変位量を演算する。演算結果は、鋼帯3が
接近した側の電磁力が弱くなるように、制御信号11と
して電磁石5Rに出力される。これにより、他方の電磁
石5Lで発生する電磁力が相対的に大きくなり、鋼帯3
は正規の走行ラインに引き戻される。このように電磁力
で鋼帯3を2段階で円弧状及び逆円弧状に湾曲させなが
ら通板するとき、従来の設備構成を大幅に替えることな
く、磁気拘束手段を組み込むだけで、鋼帯の長手方向及
び板幅方向に関してめっき付着量が均一化されためっき
鋼帯を製造することができる。また、高圧ガスを使用し
ないことから、騒音によって作業環境が悪化することも
ない。
The position of the running steel strip 3 is detected by a position sensor 7 and input to a control mechanism 9 as a signal 8 indicating a measured position. A signal 10 indicating the reference position of the steel strip 3 is input to the control mechanism 9 in advance, and the measured position signal 8 and the reference position signal 10 are compared with each other. Calculate the amount of displacement. The calculation result is output to the electromagnet 5R as the control signal 11 so that the electromagnetic force on the side closer to the steel strip 3 becomes weaker. Thereby, the electromagnetic force generated by the other electromagnet 5L becomes relatively large, and the steel strip 3
Is returned to the regular running line. In this way, when the steel strip 3 is passed by bending the steel strip 3 in two steps in an arc shape and an inverted arc shape by the electromagnetic force, the magnetic strip means can be installed simply by incorporating the magnetic restraining means without largely changing the conventional equipment configuration. It is possible to manufacture a plated steel strip in which the coating amount is uniform in the longitudinal direction and the plate width direction. Further, since no high-pressure gas is used, the working environment does not deteriorate due to noise.

【0012】[0012]

【実施例】高さ1000mm,幅1500mmの移動磁
場発生コイル4R,4Lを、めっき浴2から引き上げら
れる鋼帯3の走行ラインの両側に相互間距離10mmで
対向配置した。移動磁場発生コイル4R,4Lの上方
に、直径100mm,高さ300mmで2000ターン
の円柱状電磁石5Lと、曲率半径50mmの半円状凹面
をもつ2000ターンの電磁石5Rを鋼帯3の板幅方向
に沿ってそれぞれ3個配置し、下側磁気拘束手段とし
た。電磁石5Rの内部には、ヘッドに磁気シールドを施
した渦流式センサーを位置センサー7として挿入した。
また、下側磁気拘束手段の上方に、同様な円筒状の電磁
石6R及び半円状凹面をもつ電磁石6Lを配置し、上側
磁気拘束手段とした。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Moving magnetic field generating coils 4R and 4L having a height of 1000 mm and a width of 1500 mm were opposed to each other on both sides of a running line of a steel strip 3 pulled up from a plating bath 2 with a mutual distance of 10 mm. Above the moving magnetic field generating coils 4R and 4L, a cylindrical electromagnet 5L having a diameter of 100 mm, a height of 300 mm, and 2,000 turns, and a 2,000-turn electromagnet 5R having a semicircular concave surface with a radius of curvature of 50 mm are arranged in the width direction of the steel strip 3. And three of them are arranged along the line, thereby forming a lower magnetic restraining means. An eddy current sensor having a magnetic shield on the head was inserted as a position sensor 7 inside the electromagnet 5R.
In addition, a similar cylindrical electromagnet 6R and an electromagnet 6L having a semicircular concave surface are arranged above the lower magnetic restraining means, and used as upper magnetic restraining means.

【0013】板厚0.8mm,板幅1200mmの鋼帯
3を通板速度100m/分で溶融めっき浴2に送り込
み、めっき浴2から上方に引き上げた。一相当りの電流
値1500Aで1000Hzの三相交流を移動磁場発生
コイル4R,4Lに供給し、引上げ直後の鋼帯に下向き
の電磁力を作用させ、鋼帯表面に付着している過剰な溶
融状態のめっき金属を除去した。電磁石5R,5L及び
6R,6Lに供給する直流電流は、鋼帯3の振動及び機
械的特性に応じて50〜200Aの範囲で調整した。こ
の条件下で溶融めっきしたとき、走行している鋼帯3の
振動が大幅に抑制され、静かな環境で溶融めっきするこ
とが可能になった。得られた溶融めっき鋼板のめっき付
着量を測定し、めっき付着量の板幅方向に沿ったバラツ
キを求めた。調査結果を、電磁石5R,5L及び6R,
6Lで磁気拘束しない場合と比較して図3に示す。
A steel strip 3 having a thickness of 0.8 mm and a width of 1200 mm was fed into the hot dipping bath 2 at a feeding speed of 100 m / min, and was pulled upward from the plating bath 2. A three-phase alternating current of 1000 Hz at a current value of 1500 A is supplied to the moving magnetic field generating coils 4R and 4L to cause a downward electromagnetic force to act on the steel strip immediately after being pulled up, thereby causing excessive melting attached to the steel strip surface. The plated metal in the state was removed. The DC current supplied to the electromagnets 5R, 5L and 6R, 6L was adjusted in the range of 50 to 200A according to the vibration and mechanical properties of the steel strip 3. When hot-dip plating was performed under these conditions, the vibration of the running steel strip 3 was greatly suppressed, and hot-dip coating could be performed in a quiet environment. The coating weight of the obtained hot-dip coated steel sheet was measured, and the variation in the coating weight along the sheet width direction was determined. The survey results were obtained by using electromagnets 5R, 5L and 6R,
FIG. 3 shows a comparison with the case of 6L without magnetic constraint.

【0014】図3から明らかなように、本発明に従って
鋼帯3を磁気拘束しながら溶融めっきしたものでは、板
幅方向に関するめっき付着量のバラツキが±10g/m
2 以下に抑えられていた。これに対し、磁気拘束しない
場合、板幅方向に関するめっき付着量のバラツキは±2
0g/m2 と大きくなっていた。これは、鋼帯3を円弧
状及び逆円弧状に湾曲することにより幅反りを解消し、
移動磁場発生コイル4R,4Lの電磁力が板幅方向に関
して均一化された結果であると推察される。磁気拘束
は、鋼帯3の長手方向に関するめっき付着量のバラツキ
の抑制にも効果があった。これは、電磁石5R,5L及
び6R,6Lに供給される電流を制御して鋼帯3を基準
位置に確保することにより、走行している鋼帯3の振動
が抑制された結果であるとみられる。
As is apparent from FIG. 3, when the steel strip 3 is hot-dipped while being magnetically constrained according to the present invention, the variation in the amount of coating in the sheet width direction is ± 10 g / m.
It was kept below 2 . On the other hand, when there is no magnetic constraint, the variation in the amount of plating in the width direction of the sheet is ± 2.
It was as large as 0 g / m 2 . This eliminates width warpage by bending the steel strip 3 into an arc shape and an inverted arc shape,
It is assumed that the result is that the electromagnetic forces of the moving magnetic field generating coils 4R and 4L are made uniform in the plate width direction. The magnetic constraint was also effective in suppressing the variation in the amount of plating applied in the longitudinal direction of the steel strip 3. This is considered to be the result of suppressing the vibration of the running steel strip 3 by controlling the current supplied to the electromagnets 5R, 5L and 6R, 6L to secure the steel strip 3 at the reference position. .

【0015】[0015]

【発明の効果】以上に説明したように、本発明において
は、鋼帯表面に付着している過剰の溶融めっき金属を搾
り取る際、ワイピング装置の上方に2段配置した磁気拘
束手段で鋼帯を円弧状及び逆円弧状に湾曲させ、走行し
ている鋼帯の振動や幅反りを抑制している。そのため、
鋼帯表面のめっき金属が均等に除去され、幅方向及び長
手方向に関してめっき付着量が均一化される。このよう
にして、本発明によるとき、騒音のない静かな環境で均
質なめっき層が形成されためっき鋼帯が製造される。
As described above, in the present invention, when squeezing out excess hot-dip galvanized metal adhering to the surface of a steel strip, the steel strip is squeezed by magnetic restraining means arranged in two stages above the wiping device. It is curved in an arc shape and an inverted arc shape to suppress vibration and warpage of the running steel strip. for that reason,
The plating metal on the surface of the steel strip is evenly removed, and the amount of plating applied is uniform in the width direction and the longitudinal direction. Thus, according to the present invention, a plated steel strip having a homogeneous plated layer formed in a quiet environment without noise is manufactured.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明に従って移動磁場発生コイル及び磁場
拘束手段を設けためっき付着量制御装置
FIG. 1 is a plating adhesion amount control apparatus provided with a moving magnetic field generating coil and a magnetic field restraining means according to the present invention.

【図2】 位置センサーを組み込んだ電磁石Fig. 2 Electromagnet incorporating a position sensor

【図3】 磁場拘束手段がめっき付着量の均一化に及ぼ
す影響を表したグラフ
FIG. 3 is a graph showing the effect of the magnetic field restraining means on the uniformity of the coating weight.

【符号の説明】[Explanation of symbols]

1:シンクロール 2:溶融めっき浴 3:鋼帯
4R,4L:移動磁場発生コイル 5R,5L:下
側磁場拘束手段の電磁コイル 6R,6L:上側磁場
拘束手段の電磁コイル 7:位置センサー 8:鋼
帯の測定位置信号 9:制御機構 10:鋼帯の基準位置信号 11:
電磁石に供給する電流を制御する制御信号
1: sink roll 2: hot-dip plating bath 3: steel strip
4R, 4L: Moving magnetic field generating coil 5R, 5L: Electromagnetic coil of lower magnetic field restraining means 6R, 6L: Electromagnetic coil of upper magnetic field restraining means 7: Position sensor 8: Steel strip measurement position signal 9: Control mechanism 10: Steel Band reference position signal 11:
Control signal for controlling the current supplied to the electromagnet

───────────────────────────────────────────────────── フロントページの続き (72)発明者 中本 一成 兵庫県尼崎市鶴町1番地 日新製鋼株式会 社技術研究所内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazunari Nakamoto 1 Tsurumachi, Amagasaki-shi, Hyogo Prefecture Nisshin Steel Co., Ltd.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 めっき浴から引き上げられた鋼帯の走行
軌跡の両側に配置された一対のワイピング装置で鋼帯表
面にある過剰の溶融めっき金属を流下させ、ワイピング
装置の上方に配置された下側磁気拘束手段で鋼帯を一面
側に円弧状に弾性変形させた後、上側磁気拘束手段で鋼
帯を他面側に円弧状に弾性変形させることを特徴とする
めっき付着量の制御方法。
1. A pair of wiping devices disposed on both sides of a traveling locus of a steel strip pulled up from a plating bath causes excess hot-plated metal on the surface of the steel strip to flow down, and a lower portion disposed above the wiping device. A method for controlling the amount of plating applied, wherein the steel strip is elastically deformed in an arc shape on one side by a side magnetic restraining means, and then the steel strip is elastically deformed in an arc shape on the other side by an upper magnetic restraining means.
【請求項2】 走行している鋼帯の位置を位置センサー
で検出し、基準位置から測定位置のズレに応じて磁気拘
束手段に供給する電流を調整する請求項1記載のめっき
付着量の制御方法。
2. The plating amount control according to claim 1, wherein the position of the running steel strip is detected by a position sensor, and the current supplied to the magnetic restraining means is adjusted according to the deviation of the measuring position from the reference position. Method.
【請求項3】 めっき浴から引き上げられた鋼帯の走行
軌跡の両側に配置された一対のワイピング装置と、ワイ
ピング装置の上方に配置され、鋼帯を一面側に円弧状に
弾性変形させる円筒状電磁石と凹面状電磁石をもつ下側
磁気拘束手段と、ワイピング装置の上方に配置され、鋼
帯を他面側に円弧状に弾性変形させる円筒状電磁石と凹
面状電磁石をもつ上側磁気拘束手段とを備えているめっ
き付着量の制御装置。
3. A pair of wiping devices disposed on both sides of a traveling locus of a steel strip pulled up from a plating bath, and a cylindrical shape disposed above the wiping device and elastically deforming the steel strip to one surface side in an arc shape. A lower magnetic restraining means having an electromagnet and a concave electromagnet, and an upper magnetic restraining means having a cylindrical electromagnet and a concave electromagnet disposed above the wiping device and elastically deforming the steel strip to the other side in an arc shape. Equipped with a plating weight control device.
【請求項4】 走行している鋼帯の位置を検出する位置
センサーを鋼帯の両側に配置し、位置センサーで検出さ
れた鋼帯の測定位置が入力される制御機構を介して位置
センサーを磁気拘束手段に接続している請求項3記載の
めっき量付着の制御装置。
4. A position sensor for detecting a position of a running steel strip is disposed on both sides of the steel strip, and the position sensor is controlled via a control mechanism to which a measurement position of the steel strip detected by the position sensor is input. 4. The apparatus according to claim 3, wherein the apparatus is connected to a magnetic restraining means.
JP21656396A 1996-07-30 1996-07-30 Method for controlling plating weight and device therefor Withdrawn JPH1046309A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21656396A JPH1046309A (en) 1996-07-30 1996-07-30 Method for controlling plating weight and device therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21656396A JPH1046309A (en) 1996-07-30 1996-07-30 Method for controlling plating weight and device therefor

Publications (1)

Publication Number Publication Date
JPH1046309A true JPH1046309A (en) 1998-02-17

Family

ID=16690394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21656396A Withdrawn JPH1046309A (en) 1996-07-30 1996-07-30 Method for controlling plating weight and device therefor

Country Status (1)

Country Link
JP (1) JPH1046309A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002014574A1 (en) * 2000-08-11 2002-02-21 Abb Ab A device and a method for controlling the thickness of a coating on a metallic object
WO2002014572A1 (en) * 2000-08-11 2002-02-21 Pohang Iron And Steel Company Ltd A method for controlling the thickness of a galvanising coating on a metallic object
KR20020052114A (en) * 2000-12-23 2002-07-02 이구택 A method for controlling the thickness of a galvanizing coating on a metallic object

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002014574A1 (en) * 2000-08-11 2002-02-21 Abb Ab A device and a method for controlling the thickness of a coating on a metallic object
WO2002014572A1 (en) * 2000-08-11 2002-02-21 Pohang Iron And Steel Company Ltd A method for controlling the thickness of a galvanising coating on a metallic object
KR20020052114A (en) * 2000-12-23 2002-07-02 이구택 A method for controlling the thickness of a galvanizing coating on a metallic object

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Effective date: 20031007