JPH08325695A - Precision correction method for position detector of hot dipped steel sheet - Google Patents
Precision correction method for position detector of hot dipped steel sheetInfo
- Publication number
- JPH08325695A JPH08325695A JP12677595A JP12677595A JPH08325695A JP H08325695 A JPH08325695 A JP H08325695A JP 12677595 A JP12677595 A JP 12677595A JP 12677595 A JP12677595 A JP 12677595A JP H08325695 A JPH08325695 A JP H08325695A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- position detector
- gas wiping
- wiping nozzle
- equation
- 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.)
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- Coating With Molten Metal (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鋼板さらにはＮｉなど
の下地めっき金属を施した鋼板が圧延、鉛−錫、アルミ
ニウムなどの耐蝕性金属の溶融めっき浴を通過して走行
する、溶融めっき鋼板の長手・幅方向付着量制御におい
て使用されている鋼板位置検出器の精度補正方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-dip galvanizing method in which a steel sheet or a steel sheet coated with a base plating metal such as Ni runs through a hot-dip galvanizing bath of a corrosion-resistant metal such as lead-tin or aluminum. The present invention relates to a method of correcting the accuracy of a steel plate position detector used in controlling the amount of adhered steel plates in the longitudinal and width directions.
【０００２】[0002]
【従来の技術】溶融めっき鋼板は比較的融点の低い亜
鉛、錫、アルミニウムなどその種類は多く、中でも亜鉛
めっき鋼板あるいはその合金化亜鉛めっき鋼板は、耐蝕
性や溶接性に優れている特性から、自動車や家電の素材
として多く使用されている。こうした溶融めっき鋼板
は、一般に熱間圧延さらには冷間圧延された鋼板が、予
備酸化炉次いで還元焼鈍炉さらには冷却炉を通り、溶融
めっき浴を通過して、表面に付着した溶融状態のめっき
金属をガスワイピングノズルで払拭しながら所定の目付
量に制御し、必要によっては、さらに合金化加熱炉を通
って製造されている。2. Description of the Related Art Hot-dip galvanized steel sheets are of many types such as zinc, tin, and aluminum, which have relatively low melting points. It is often used as a material for automobiles and home appliances. Such hot-dip galvanized steel sheet is generally a hot-rolled or cold-rolled steel sheet that passes through a preliminary oxidation furnace, then a reduction annealing furnace, and then a cooling furnace, passes through a hot-dip galvanizing bath, and is in a molten state on the surface. The metal is wiped with a gas wiping nozzle while being controlled to have a predetermined basis weight, and if necessary, it is further manufactured by passing through an alloying heating furnace.
【０００３】しかしながら、製造された溶融めっき鋼板
のめっき金属の目付量は、長手・幅方向で大きなばらつ
きを生じ、溶接性あるいは密着塗装性に支障を来す問題
があった。こうした問題は、鋼板とガスワイピングノズ
ルとの間隔に依存し、その間隔を常に一定に図ることで
解決できるが、鋼板の振動や各種の形状に変化して走行
するため解決するに至っていない。However, there is a problem that the basis weight of the plated metal of the manufactured hot dip plated steel sheet varies greatly in the longitudinal and width directions, and the weldability or the close coatability is impaired. Such a problem depends on the distance between the steel plate and the gas wiping nozzle and can be solved by always keeping the distance constant, but it has not been solved because the steel plate vibrates and changes in various shapes to travel.
【０００４】所定の目付にする手段として、（ａ）ガス
ワイピングノズル直上に鋼板位置検出器を設置し、鋼板
とノズル間距離を検出し、その数値よりオペレータが経
験的に適切なガスワイピングノズル位置やガスワイピン
グノズル圧力を調整する方法、（ｂ）特開平６−３２２
５０４号公報のようにガスワイピングノズル直上に鋼板
位置検出器を設置し、鋼板とノズル間距離の検出値を用
いてプロコンにて所定の目付になるように自動制御を実
施する方法がある。As means for making a predetermined basis weight, (a) a steel plate position detector is installed directly above the gas wiping nozzle, the distance between the steel plate and the nozzle is detected, and the operator empirically finds the gas wiping nozzle position appropriate from the numerical value. And a method for adjusting gas wiping nozzle pressure, (b) JP-A-6-322
As disclosed in Japanese Patent No. 504, there is a method in which a steel plate position detector is installed directly above a gas wiping nozzle and automatic control is performed by a process controller using a detected value of the distance between the steel plate and the nozzle so that a predetermined basis weight is obtained.
【０００５】しかしながら、上記の（ａ）や（ｂ）のよ
うに鋼板とノズル間距離を検出する鋼板位置検出器を用
いて、所定の目付になるように設備をコントロールする
場合、鋼板位置検出器の精度が必要となるが、既存のセ
ンサーでは精度を出すために頻繁にセンサー精度の補正
を実施したり、センサーを交換したりと品質を保証する
ためにセンサー精度維持の多大な手間を必要とした。However, when the equipment is controlled so as to obtain a predetermined basis weight by using the steel plate position detector for detecting the distance between the steel plate and the nozzle as in the above (a) and (b), the steel plate position detector is used. However, the existing sensor requires a lot of time and effort to maintain the sensor accuracy in order to guarantee the quality by frequently correcting the sensor accuracy in order to obtain the accuracy and replacing the sensor. did.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、このような
従来技術の難点を克服し、溶融めっき浴からガスワイピ
ングノズル域を通って走行するめっき鋼板の測定付着量
から鋼板とノズル間の推定距離を算出し、鋼板位置検出
器出力値を用いて、関数近似を実施し、精度補正を実施
することを目的とする。SUMMARY OF THE INVENTION The present invention overcomes the drawbacks of the prior art, and estimates between the steel plate and the nozzle from the measured adhesion amount of the plated steel plate traveling from the hot dip bath through the gas wiping nozzle region. The purpose is to calculate the distance, perform function approximation using the steel plate position detector output value, and perform accuracy correction.
【０００７】[0007]
【課題を解決するための手段】即ち、本発明は、溶融め
っき浴からガスワイピングノズル域を通って走行するめ
っき鋼板にγ線又はＸ線を照射して受光する蛍光Ｘ線強
度を検出し、表裏のめっき付着量を測定するめっき付着
量測定装置と鋼板位置検出器及び、めっき付着量測定装
置から検出された付着量とその付着量と対応するガスワ
イピングノズル圧力、通板速度より第（１）式を用いて
算出された推定距離と、付着量と対応し、鋼板位置検出
器より検出された測定距離を第（２）式のように関数近
似を実施し、その逆関数を第（３）式のように求め、第
（４）式を用いて精度特性を考慮した鋼板位置検出器の
補正後の出力を求める補正演算装置を用い、鋼板位置検
出器の精度補正を実施することを特徴とする溶融めっき
鋼板位置検出器の精度補正方法である。 Ｄ＝〔lnＷ−（Ｋ0 ＋Ｋ1 ×Ｐ＋Ｋ2 ×Ｖ）〕／Ｋ3 （１） 但し、Ｄ：鋼板からガスワイピングノズルとの距離（m
m） Ｗ：付着量値（kg/m2 ） Ｐ：ガスワイピングノズル圧力 (kg/cm2 ) Ｖ：通板速度（ｍ／分） Ｋ0 〜Ｋ3 ：鋼種別の定数 ｙ＝Ｑ（ｘ） （２） ｙ＝Ｑ-1（ｘ） （３） 補正後出力値＝Ｑ-1（Ｑ（ｘ）） （４）Means for Solving the Problems That is, the present invention detects the fluorescent X-ray intensity received by irradiating γ-rays or X-rays to a plated steel sheet traveling from a hot dip bath through a gas wiping nozzle region, The plating adhesion amount measuring device and the steel plate position detector for measuring the plating adhesion amount on the front and back sides, and the adhesion amount detected from the plating adhesion amount measuring device and the corresponding gas wiping nozzle pressure and plate passing speed ) The estimated distance calculated by using the equation) and the measured distance detected by the steel plate position detector corresponding to the adhesion amount are subjected to function approximation as in equation (2), and the inverse function thereof is calculated as (3) ), And the accuracy of the steel plate position detector is corrected using a correction calculation device that obtains the corrected output of the steel plate position detector in consideration of the accuracy characteristics using the formula (4). Of hot-dip steel sheet position detector In degrees correction method. D = [lnW- (K 0 + K 1 × P + K 2 × V) ] / K 3 (1) where, D: distance between the gas wiping nozzle from the steel plate (m
m) W: Adhesion amount value (kg / m 2 ) P: Gas wiping nozzle pressure (kg / cm 2 ) V: Plate passing speed (m / min) K 0 to K 3 : Constant of steel type y = Q (x ) (2) y = Q -1 (x) (3) Corrected output value = Q -1 (Q (x)) (4)
【０００８】[0008]
【作用】図１は、本発明の鋼板位置検出器の精度補正方
法を実施するための装置例を示す。１は、亜鉛、鉛−錫
などの耐蝕性金属がめっきされ、走行する鋼板である。
鋼板は、溶融めっき浴中のシンクロール２を周回してめ
っきされ、下方サポートロール３、上方サポートロール
４で形状矯正されながら上昇し、ガスワイピングノズル
５さらには必要に応じて設置される電磁ワイピングノズ
ルで所定のめっき付着量に制御した後上昇し、トップロ
ール８に至る。FIG. 1 shows an example of an apparatus for implementing the accuracy correction method for a steel plate position detector according to the present invention. Reference numeral 1 is a steel plate on which a corrosion-resistant metal such as zinc or lead-tin is plated and which runs.
The steel sheet is plated around the sink roll 2 in the hot dip plating bath and rises while the shape is corrected by the lower support roll 3 and the upper support roll 4, and the gas wiping nozzle 5 and electromagnetic wiping installed as needed. After controlling to a predetermined amount of plating by a nozzle, it rises and reaches the top roll 8.
【０００９】ガスワイピングノズル５の直上には鋼板位
置検出器６が設置され、鋼板１とガスワイピングノズル
５との距離を測定している。７は鋼板１のめっき付着量
測定装置で、ガスワイピングノズル５の上方に設置され
る。このめっき付着量測定装置７は、走行するめっき鋼
板１にγ線またはＸ線を照射して蛍光Ｘ線強度を検出
し、表裏面のめっき付着量を測定する。A steel plate position detector 6 is installed immediately above the gas wiping nozzle 5 to measure the distance between the steel plate 1 and the gas wiping nozzle 5. Reference numeral 7 denotes a plating adhesion amount measuring device for the steel plate 1, which is installed above the gas wiping nozzle 5. This plating adhesion amount measuring device 7 irradiates the traveling plated steel sheet 1 with γ-rays or X-rays to detect the fluorescent X-ray intensity and measures the plating adhesion amount on the front and back surfaces.
【００１０】９は補正演算装置であり、めっき付着量測
定装置７から送信された鋼板の表裏面のめっき付着量か
ら以下の式に基づき、鋼板１とガスワイピングノズル５
との推定距離を算出する。Reference numeral 9 denotes a correction calculation device, which is based on the following equation based on the amount of plating on the front and back surfaces of the steel sheet transmitted from the amount of plating deposition measuring device 7 and the steel plate 1 and the gas wiping nozzle 5:
And calculate an estimated distance between and.
【００１１】付着量を決定する要因としては通板速度Ｖ
（ｍ／分）、鋼板１からガスワイピングノズル５との距
離Ｄ（mm）、ガスワイピング圧力Ｐ(kg/cm2 ) 、鋼板表
面性状、鋼中成分、めっき浴進入直前板温、めっき成
分、めっき浴温度、鋼板サイズなどがあるが、ガスワイ
ピング圧力Ｐ(kg/cm2 ) 、通板速度Ｖ（ｍ／分）、鋼板
１からガスワイピングノズル５との距離Ｄ（mm) 以外の
要因においては、鋼種によってできるか、又は変動に対
する付着量影響が小さいため、Ｐ、Ｖ、Ｄで付着量を精
度よく算出でき、第（５）式なる関係が成立する。 Ｗ＝Ｆ（Ｐ、Ｖ、Ｄ） （５）The passing speed V is a factor that determines the adhesion amount.
(M / min), distance D (mm) from the steel plate 1 to the gas wiping nozzle 5, gas wiping pressure P (kg / cm 2 ), steel plate surface properties, steel medium components, plate temperature immediately before entering the plating bath, plating components, Although there are plating bath temperature, steel plate size, etc., in factors other than gas wiping pressure P (kg / cm 2 ), plate passing speed V (m / min), and distance D (mm) from steel plate 1 to gas wiping nozzle 5. Can be done depending on the steel type, or has a small influence on the variation in the amount of adhesion, so the amount of adhesion can be calculated accurately with P, V, and D, and the relationship expressed by equation (5) is established. W = F (P, V, D) (5)
【００１２】Ｆはガスワイピングノズル形状、めっき成
分、鋼板の成分に依存する関数であるので、同一設備及
びめっき成分を限定することによって決定できる。溶融
亜鉛めっきで、付着量３０〜２００ g/m2 の場合には第
（６）式のような付着量回帰モデル式を得ることができ
て、Ｋ0 〜Ｋ3 は定数を示し、鋼板１の種類によって異
なる。 Ｗ＝ exp（Ｋ0 ＋Ｋ1 Ｐ＋Ｋ2 Ｖ＋Ｋ3 Ｄ） （６）Since F is a function that depends on the shape of the gas wiping nozzle, the plating composition, and the composition of the steel sheet, it can be determined by limiting the same equipment and plating composition. In the case of hot-dip galvanizing and the amount of adhesion is 30 to 200 g / m 2 , it is possible to obtain an adhesion amount regression model formula such as the formula (6), and K 0 to K 3 indicate constants. It depends on the type. W = exp (K 0 + K 1 P + K 2 V + K 3 D) (6)
【００１３】第（６）式より、鋼板１とガスワイピング
ノズル５との推定距離は第（１）式のように算出でき
る。 Ｄ＝〔lnＷ−（Ｋ0 ＋Ｋ1 ×Ｐ＋Ｋ2 ×Ｖ）〕／Ｋ3 （１）From the equation (6), the estimated distance between the steel plate 1 and the gas wiping nozzle 5 can be calculated by the equation (1). D = [lnW- (K 0 + K 1 × P + K 2 × V) ] / K 3 (1)
【００１４】第（１）式より算出された鋼板１とガスワ
イピングノズル５との推定距離をｘ、さらにそれに対応
する鋼板位置検出器６より測定された鋼板１とガスワイ
ピングノズル５との測定距離をｙとしてプロットする
と、図２のようになり、これらのデータを用いて逐次型
最小二乗法により関数近似すると第（２）式のように表
すことができる。 ｙ＝Ｑ（ｘ） （２） 第（２）式が鋼板位置検出器６の精度特性を表す。第
（２）式の逆関数は、第（３）式のように表すことがで
きる。 ｙ＝Ｑ-1（ｘ） （３）The estimated distance between the steel plate 1 and the gas wiping nozzle 5 calculated by the equation (1) is x, and the corresponding measured distance between the steel plate 1 and the gas wiping nozzle 5 is measured by the steel plate position detector 6. Is plotted as y, the result is as shown in FIG. 2, and when these data are used to approximate the function by the recursive least squares method, it can be expressed as the equation (2). y = Q (x) (2) Formula (2) represents the accuracy characteristic of the steel plate position detector 6. The inverse function of the equation (2) can be expressed as the equation (3). y = Q -1 (x) (3)
【００１５】したがって、精度特性を考慮した鋼板位置
検出器の補正後の出力値は、第（４）式のように算出で
きる。 補正後出力値＝Ｑ-1（Ｑ（ｘ）） （４）Therefore, the corrected output value of the steel plate position detector in consideration of the accuracy characteristic can be calculated by the equation (4). Output value after correction = Q -1 (Q (x)) (4)
【００１６】上記の方法により、付着量値と圧力、通板
速度から推定された鋼板１とガスワイピングノズル５と
の距離と、鋼板位置検出器６より測定された鋼板１とガ
スワイピングノズル５との測定距離を関数近似し、出力
補正をすることで、精度特性の直線性を保持することが
可能となる。According to the above method, the distance between the steel plate 1 and the gas wiping nozzle 5 estimated from the adhesion amount value, the pressure, and the sheet passing speed, and the steel plate 1 and the gas wiping nozzle 5 measured by the steel plate position detector 6. It is possible to maintain the linearity of the accuracy characteristics by approximating the measured distance of (1) by a function and correcting the output.
【００１７】[0017]
【実施例】ガスワイピングノズル直上に鋼板位置検出器
を設置し、付着量値から推定した鋼板とガスワイピング
ノズル間推定距離と鋼板位置検出器の出力値による鋼板
とガスワイピングノズル間距離を逐次型最小二乗法によ
り、関数近似し、補正をおこなった結果を図３に示す。[Example] A steel plate position detector was installed directly above the gas wiping nozzle, and the estimated distance between the steel plate and the gas wiping nozzle estimated from the adhesion amount value and the distance between the steel plate and the gas wiping nozzle based on the output value of the steel plate position detector were sequentially calculated. FIG. 3 shows the result of performing the function approximation and the correction by the least square method.
【００１８】図３の□印は、めっき付着量測定装置から
検出された付着量とその付着量と対応するガスワイピン
グノズル圧力、通板速度より第（１）式を用いて算出さ
れた推定距離と付着量と対応し、鋼板位置検出器より検
出された測定距離の実測値である。The mark □ in FIG. 3 indicates the estimated amount calculated by using the formula (1) from the amount of adhesion detected by the plating amount measuring device, the gas wiping nozzle pressure corresponding to the amount of adhesion, and the plate passing speed. Is a measured value of the measured distance detected by the steel plate position detector in correspondence with the adhered amount.
【００１９】図３の線は、□印の実測値を最小二乗法
より関数近似された結果であり、ｙ＝２．６６＋０．３
８×ｘ＋０．０２×ｘ2 で表すことができる。但し、ｘ
はめっき付着量測定装置から検出された付着量とその付
着量と対応するガスワイピングノズル圧力、通板速度よ
り第（１）式を用いて算出された推定距離、ｙは付着量
と対応し、鋼板位置検出器より検出された測定距離の実
測値である。The line in FIG. 3 is the result of function approximation of the actual measurement value of □ by the method of least squares, and y = 2.66 + 0.3.
It can be represented by 8 × x + 0.02 × x 2 . However, x
Is an estimated distance calculated using the formula (1) from the coating amount detected by the plating coating amount measuring device, the gas wiping nozzle pressure corresponding to the coating amount and the plate passing speed, and y corresponds to the coating amount, It is the actual measurement value of the measurement distance detected by the steel plate position detector.
【００２０】の関数の逆関数はで、ｙ＝６．５×
（ｘ）1/2 −０．８５と表すことができる。この結果を
用いて、精度補正を実施した結果、線のような直線性
が得られ、これは理想直線となる。The inverse function of the function of is: y = 6.5 ×
It can be expressed as (x) 1/2 -0.85. As a result of performing accuracy correction using this result, linearity like a line is obtained, which is an ideal straight line.
【００２１】このように、補正を実施することにより、
付着量値から推定した距離と鋼板位置検出器による測定
値の直線性が保持され、精度補正が可能となる。By performing the correction in this way,
The linearity between the distance estimated from the adhesion amount value and the measured value by the steel plate position detector is maintained, and the accuracy can be corrected.
【００２２】[0022]
【発明の効果】以上説明した本発明の精度補正方法は、
使用する鋼板位置検出器の精度維持が簡単であり、ばら
つきのない良好な鋼板の目付量制御に際して非常に有効
なものである。The accuracy correction method of the present invention described above is
It is easy to maintain the accuracy of the steel plate position detector used, and it is very effective for good control of the basis weight of the steel plate without variations.
【図１】鋼板位置検出器の精度補正装置の構成を示す。FIG. 1 shows the configuration of an accuracy correction device for a steel plate position detector.
【図２】鋼板位置検出器より測定された鋼板とガスワイ
ピングノズル間の測定距離と付着量値より推定された鋼
板とガスワイピングノズル間の推定距離の関係を示す。FIG. 2 shows a relationship between a measured distance between a steel plate and a gas wiping nozzle measured by a steel plate position detector and an estimated distance between the steel plate and the gas wiping nozzle estimated from an adhesion amount value.
【図３】鋼板位置検出器の精度補正方法により、校正さ
れる前と後の鋼板位置検出器より測定された鋼板とガス
ワイピングノズル間の測定距離と付着量値より推定され
た鋼板とガスワイピングノズル間の推定距離の関係を示
す。 曲線：□印の実績値を関数近似したもの。ｙ＝Ｑ
（Ｘ） 曲線：曲線の逆関数。ｙ＝Ｑ-1（ｘ） 曲線：補正後出力値＝Ｑ-1（Ｑ（ｘ））の関係から、
算出された補正後出力値の関係FIG. 3 is a steel plate and gas wiping estimated from a measurement distance between a steel plate position detector and a gas wiping nozzle measured by the steel plate position detector before and after calibration by the accuracy correction method of the steel plate position detector and an adhesion amount value. The relationship of the estimated distance between nozzles is shown. Curve: □ is a function approximation of the actual value. y = Q
(X) Curve: Inverse function of curve. y = Q −1 (x) curve: From the relationship of corrected output value = Q −1 (Q (x)),
Relationship between calculated corrected output values
１ 鋼板 ２ シンクロール ３ 下方サポートロール ４ 上方サポートロール ５ ガスワイピングノズル ６ 鋼板位置検出器 ７ 付着量測定装置 ８ トップロール ９ 補正演算装置 1 Steel Plate 2 Sink Roll 3 Lower Support Roll 4 Upper Support Roll 5 Gas Wiping Nozzle 6 Steel Plate Position Detector 7 Adhesion Measurement Device 8 Top Roll 9 Correction Calculation Device
フロントページの続き (72)発明者 緒方 光男 福岡県北九州市戸畑区飛幡町１番１号 新 日本製鐵株式会社八幡製鐵所内Front page continuation (72) Inventor Mitsuo Ogata 1-1 Hibahata-cho, Tobata-ku, Kitakyushu-shi, Fukuoka Shin Nippon Steel Corporation Yawata Works
Claims (1)
域を通って走行するめっき鋼板にγ線又はＸ線を照射し
て受光する蛍光Ｘ線強度を検出し、表裏のめっき付着量
を測定するめっき付着量測定装置と鋼板位置検出器及び
めっき付着量測定装置から検出された付着量とその付着
量と対応するガスワイピングノズル圧力、通板速度よ
り、第（１）式を用いて算出された推定距離と、付着量
と対応し、鋼板位置検出器より検出された測定距離を第
（２）式のように関数近似を実施し、その逆関数を第
（３）式のように求め、第（４）式を用いて精度特性を
考慮した鋼板位置検出器の補正後の出力を求める補正演
算装置を用い、鋼板位置検出器の精度補正を実施するこ
とを特徴とする溶融めっき鋼板位置検出器の精度補正方
法。 Ｄ＝〔lnＷ−（Ｋ0 ＋Ｋ1 ×Ｐ＋Ｋ2 ×Ｖ）〕／Ｋ3 （１） 但し、Ｄ：鋼板からガスワイピングノズルとの距離（m
m） Ｗ：付着量値（kg/m2 ） Ｐ：ガスワイピングノズル圧力(kg/cm2 ) Ｖ：通板速度（ｍ／分） Ｋ0 〜Ｋ3 ：鋼種別の定数 ｙ＝Ｑ（ｘ） （２） ｙ＝Ｑ-1（ｘ） （３） 補正後出力値＝Ｑ-1（Ｑ（ｘ）） （４）Claim: What is claimed is: 1. Adhesion of plating for measuring the adhesion amount of plating on the front and back sides by detecting the intensity of fluorescent X-rays received by irradiating the plated steel sheet running from the hot dip plating bath through the gas wiping nozzle region with γ-rays or X-rays. Estimated distance calculated using equation (1) from the amount of adhesion detected from the amount measuring device, the steel plate position detector, and the plating adhesion amount measuring device, the gas wiping nozzle pressure corresponding to the adhesion amount, and the plate passing speed. And the measured distance detected by the steel plate position detector corresponding to the adhered amount is subjected to a function approximation as in the equation (2), and its inverse function is obtained as in the equation (3). The accuracy of the hot-dip galvanized steel sheet position detector is characterized by performing the accuracy correction of the steel sheet position detector using a correction arithmetic unit that obtains the corrected output of the steel sheet position detector that takes into account the accuracy characteristics using Correction method. D = [lnW- (K 0 + K 1 × P + K 2 × V) ] / K 3 (1) where, D: distance between the gas wiping nozzle from the steel plate (m
m) W: Adhesion amount value (kg / m 2 ) P: Gas wiping nozzle pressure (kg / cm 2 ) V: Stripping speed (m / min) K 0 to K 3 : Constant of steel type y = Q (x ) (2) y = Q -1 (x) (3) Corrected output value = Q -1 (Q (x)) (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12677595A JPH08325695A (en) | 1995-05-25 | 1995-05-25 | Precision correction method for position detector of hot dipped steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12677595A JPH08325695A (en) | 1995-05-25 | 1995-05-25 | Precision correction method for position detector of hot dipped steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08325695A true JPH08325695A (en) | 1996-12-10 |
Family
ID=14943631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12677595A Pending JPH08325695A (en) | 1995-05-25 | 1995-05-25 | Precision correction method for position detector of hot dipped steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08325695A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100530054B1 (en) * | 2001-08-24 | 2005-11-22 | 주식회사 포스코 | Apparatus for controlling distance of an air knife in continuous galvanizing line |
-
1995
- 1995-05-25 JP JP12677595A patent/JPH08325695A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100530054B1 (en) * | 2001-08-24 | 2005-11-22 | 주식회사 포스코 | Apparatus for controlling distance of an air knife in continuous galvanizing line |
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