JP2605521B2 - Vibration prevention method for hot-dip galvanized steel strip - Google Patents
Vibration prevention method for hot-dip galvanized steel stripInfo
- Publication number
- JP2605521B2 JP2605521B2 JP3245718A JP24571891A JP2605521B2 JP 2605521 B2 JP2605521 B2 JP 2605521B2 JP 3245718 A JP3245718 A JP 3245718A JP 24571891 A JP24571891 A JP 24571891A JP 2605521 B2 JP2605521 B2 JP 2605521B2
- Authority
- JP
- Japan
- Prior art keywords
- steel strip
- hot
- galvanized steel
- dip galvanized
- compressed air
- 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.)
- Expired - Fee Related
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- Coating With Molten Metal (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、溶融亜鉛めっき鋼帯
を加熱して合金化溶融亜鉛めっき鋼帯を製造するに際し
ての溶融亜鉛めっき鋼帯の振動防止方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing a hot-dip galvanized steel strip from vibrating when the hot-dip galvanized steel strip is heated to produce an alloyed hot-dip galvanized steel strip.
【０００２】[0002]
【従来の技術】合金化溶融亜鉛めっき鋼帯は、溶融亜鉛
めっきしたままの溶融亜鉛めっき鋼帯に比較して、塗装
性および溶接性に優れているため、高度な耐食性が要求
されかつ高い溶接作業性が要求される自動車用鋼板等に
使用される。2. Description of the Related Art An alloyed hot-dip galvanized steel strip is more excellent in paintability and weldability than a hot-dip galvanized steel strip, so that a high corrosion resistance is required and a high welding strength is required. It is used for steel plates for automobiles that require workability.
【０００３】上述した合金化溶融亜鉛めっき鋼帯は、図
５に示す工程により製造される。すなわち、溶融亜鉛２
１を満たした溶融亜鉛めっき槽２２に浸漬された鋼帯２
３は、シンクロール２４により進行方向が変えられ垂直
上方に引き上げられる。鋼帯２３の表裏面に付着する亜
鉛の付着量は、溶融亜鉛めっき槽２２からの引き上げ速
度におよそ比例して多くなるので、一般的には過剰な亜
鉛が付着しがちであり、この過剰な亜鉛は、溶融亜鉛め
っき槽２２の上方に設けたワイピングノズル２５によ
り、空気、窒素ガス等の高圧ガスを吹き付けて、絞り取
るようにしている。[0003] The alloyed hot-dip galvanized steel strip described above is manufactured by the process shown in FIG. That is, molten zinc 2
Steel strip 2 immersed in hot-dip galvanizing tank 22 filled with 1
3 is moved vertically by the sink roll 24 and pulled up vertically. The amount of zinc adhering to the front and back surfaces of the steel strip 23 increases almost in proportion to the pulling speed from the hot-dip galvanizing tank 22, so that in general, excess zinc tends to adhere. Zinc is squeezed out by blowing high-pressure gas such as air or nitrogen gas by a wiping nozzle 25 provided above the hot-dip galvanizing tank 22.
【０００４】このようにして所定の付着量の亜鉛が付着
した溶融亜鉛めっき鋼帯２６は、タッチロール２７を通
り、垂直に合金化炉２８に導き入れられ、５００〜６０
０℃程度に加熱される。さらに、合金化炉２８出口上方
に設けられた保熱帯２９で一定時間一定温度に保持され
た後、保熱帯２９上方に設けられた冷却帯３０で冷却さ
れ、合金化溶融亜鉛めっき鋼帯３１になるとともに、冷
却帯３０上方に配置したトップロール３２により進行方
向を垂直方向から水平方向に変更され、次の工程に入っ
て行く。[0004] The hot-dip galvanized steel strip 26 to which a predetermined amount of zinc has adhered passes through the touch roll 27 and is guided vertically into the alloying furnace 28, where it is 500 to 60.
Heated to about 0 ° C. Further, after being kept at a constant temperature for a certain period of time in a preserving zone 29 provided above the outlet of the alloying furnace 28, it is cooled in a cooling zone 30 provided above the preserving zone 29, and is formed into a galvannealed steel strip 31. At the same time, the traveling direction is changed from the vertical direction to the horizontal direction by the top roll 32 disposed above the cooling zone 30, and the process proceeds to the next step.
【０００５】上述した合金化溶融亜鉛めっき鋼帯の製造
工程においては、シンクロール２４とトップロール３２
間で、溶融亜鉛めっき鋼帯２６および合金化溶融亜鉛め
っき鋼帯３１に張力が付与されているとはいえ、最近の
高速ラインにおいてはシンクロール２４とトップロール
３２間の距離が４０ｍ以上にもなるので、溶融亜鉛めっ
き鋼帯２６および合金化溶融亜鉛めっき鋼帯３１が板厚
の方向に振動し、めっきの付着量がばらつくという問題
がある。In the manufacturing process of the galvannealed steel strip described above, the sink roll 24 and the top roll 32
Although the tension is applied to the hot-dip galvanized steel strip 26 and the alloyed hot-dip galvanized steel strip 31, the distance between the sink roll 24 and the top roll 32 is 40 m or more in a recent high-speed line. Therefore, there is a problem that the hot-dip galvanized steel strip 26 and the alloyed hot-dip galvanized steel strip 31 vibrate in the direction of the plate thickness, and the adhesion amount of plating varies.
【０００６】このような振動を防止する技術としては、
「溶融亜鉛めっき鋼板製造技術の進歩」（第１０６回、
第１０７回西山記念講座、ｐ９）に記載されているよう
な静圧パッドがある。この静圧パッドは、図６に示すよ
うに、冷却帯３０を通過中の溶融亜鉛めっき鋼帯２６の
両側に設けた１対の圧縮空気吹付装置４１の圧縮空気供
給室４２から、スリットノズル４３を通して圧縮空気を
溶融亜鉛めっき鋼帯２６の両面に吹き付けて、溶融亜鉛
めっき鋼帯２６の表面に静圧領域４４を生成させたもの
である。そして、この静圧領域４４のダンパー効果を利
用して、溶融亜鉛めっき鋼帯２６が振動によりいずれか
の静圧領域４４にずれようとしても、すばやくもとの位
置に押し戻してやるのである。Techniques for preventing such vibrations include:
"Advances in hot-dip galvanized steel sheet manufacturing technology" (106th,
107th Nishiyama Memorial Lecture, there is static pressure pad as described in p9). As shown in FIG. 6, the static pressure pad is supplied from a compressed air supply chamber 42 of a pair of compressed air blowing devices 41 provided on both sides of the hot-dip galvanized steel strip 26 passing through the cooling zone 30 to a slit nozzle 43. Compressed air is blown onto both sides of the hot-dip galvanized steel strip 26 to generate a static pressure region 44 on the surface of the hot-dip galvanized steel strip 26. Then, by utilizing the damper effect of the static pressure region 44, even if the hot-dip galvanized steel strip 26 shifts to one of the static pressure regions 44 due to vibration, it is quickly pushed back to the original position.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、上述し
たような従来の溶融亜鉛めっき鋼帯の振動を防止する方
法においては、両側の静圧領域の静圧が等しくなるよう
に設定するようにしているので、静圧パッドに圧縮空気
を送るブロワに圧力の変動があると、この影響を受けて
両側の静圧領域の静圧のバランスが崩れやすく、したが
ってこのような状態になると、振動が発生するという問
題点があった。However, in the above-described conventional method for preventing the vibration of a hot-dip galvanized steel strip, the static pressure in both static pressure regions is set to be equal. Therefore, if the pressure of the blower that sends compressed air to the static pressure pad fluctuates, the balance of the static pressure in the static pressure regions on both sides is easily affected by the fluctuation, and, in such a state, vibration occurs. There was a problem.
【０００８】この発明は、従来技術の上述のような問題
点を解消し、圧縮空気を送るブロワに圧力の変動があっ
ても、溶融亜鉛めっき鋼帯に振動が発生しない溶融亜鉛
めっき鋼帯の振動防止方法を提供することを目的として
いる。The present invention solves the above-mentioned problems of the prior art, and provides a hot-dip galvanized steel strip in which vibration does not occur in the hot-dip galvanized steel strip even when the pressure of the blower for sending compressed air fluctuates. It is intended to provide a method for preventing vibration.
【０００９】[0009]
【課題を解決するための手段】この発明に係る溶融亜鉛
めっき鋼帯の振動防止方法は、溶融亜鉛めっき鋼帯の両
面にスリットノズル装置により圧縮空気を吹き付けて、
溶融亜鉛めっき槽のシンクロールからトップロールまで
の間を通過する溶融亜鉛めっき鋼帯の振動を防止する溶
融亜鉛めっき鋼帯の振動防止方法において、溶融亜鉛め
っき鋼帯を挟んで対向する複数対のスリットノズル装置
を溶融亜鉛めっき鋼帯の進行方向に配列して設け、各々
の対向するスリットノズル装置間においては、溶融亜鉛
めっき鋼帯に吹き付ける圧縮空気の圧力に差を設けると
ともに、溶融亜鉛めっき鋼帯の一方の面側の複数のスリ
ットノズル装置から溶融亜鉛めっき鋼帯に吹き付けられ
る圧縮空気の圧力の平均値が、他方の面側の複数のスリ
ットノズル装置から溶融亜鉛めっき鋼帯に吹き付けられ
る圧縮空気の圧力の平均値と、略等しいようにすること
を特徴とするものである。スリットノズル装置は、複数
のスリットノズルを一体化して圧縮空気を吹き付けるも
のであってもよいし、個々に独立したスリットノズルか
ら圧縮空気を吹き付けるものであってもよい。 The method for preventing vibration of a hot-dip galvanized steel strip according to the present invention comprises blowing compressed air to both sides of a hot-dip galvanized steel strip by a slit nozzle device .
In vibration control method of galvanized steel strip to prevent vibration of the galvanized steel strip passing until the top roll from the sink roll in the molten zinc plating bath, molten zinc Me
Pair of slit nozzle devices facing each other across a steel strip
Are arranged in the traveling direction of the hot-dip galvanized steel strip.
Between the opposed slit nozzle devices
If there is a difference in the pressure of the compressed air blown to the plated steel strip
In both cases, multiple slots on one side of the hot-dip galvanized steel strip
Sprayed on hot-dip galvanized steel strip
The average value of the compressed air pressure
Sprayed on hot-dip galvanized steel strip
Should be approximately equal to the average value of the compressed air pressure
It is characterized by the following. Multiple slit nozzle devices
The compressed air is blown by integrating the slit nozzle of
Or an independent slit nozzle
The compressed air may be blown from the compressed air.
【００１０】[0010]
【作用】この発明は、前記のように構成されているの
で、圧縮空気を送るブロワに圧力の変動があっても、溶
融亜鉛めっき鋼帯の振動を低減できる。圧縮空気の圧力
差をブロワの圧力変動を上回る圧力差にすると振動防止
効果がより大きい。The present invention is configured as described above.
In, even in the event of a change in pressure in the blower sending the compressed air, soluble
Vibration of the galvanized steel strip can be reduced. Compressed air pressure
Vibration is prevented if the pressure difference exceeds the pressure fluctuation of the blower
Effect is larger heard.
【００１１】[0011]
【実施例】本発明の１実施例の溶融亜鉛めっき鋼帯の振
動防止方法を、図１〜図３により説明する。本発明の１
実施例の溶融亜鉛めっき鋼帯の振動防止方法は、スリッ
トノズル装置として、図１に示すように、垂直に上昇す
る溶融亜鉛めっき鋼帯２６の両側に吹き付け方向が上下
方向の中心を向くように設けられた上下２本のスリット
ノズル１を有する１対の静圧パッド２を、図２に示す冷
却帯３０の冷却ノズル３の間に複数対設けている。図３
は上述した複数対の静圧パッド２の相対する静圧パッド
２ａおよび２ｂに、圧力差を設けて圧縮空気を送るため
の配管系統図を示すものである。トップロール３２直下
の冷却帯に、Ａ〜Ｄで示す静圧パッド４対を溶融亜鉛め
っき鋼帯２６を挟んで配置しているケースであり、ブロ
ワ４により送り出された圧縮空気は、ダンパ５を通った
ものは溶融亜鉛めっき鋼帯２６の表側（符号Ｓ）の静圧
パッド２ａに供給され、ダンパ６を通ったものは溶融亜
鉛めっき鋼帯２６の裏側（符号Ｒ）の静圧パッド２ｂに
供給されるようになっている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for preventing vibration of a galvanized steel strip according to one embodiment of the present invention will be described with reference to FIGS. 1 of the present invention
Vibration prevention method of galvanized steel strip embodiment, slit
As shown in FIG. 1, a pair of upper and lower slit nozzles 1 are provided on both sides of a vertically ascending hot-dip galvanized steel strip 26 so that the spray direction is directed to the center in the vertical direction. A plurality of pairs of the static pressure pads 2 are provided between the cooling nozzles 3 of the cooling zone 30 shown in FIG. FIG.
FIG. 3 shows a piping diagram for sending compressed air by providing a pressure difference to the opposing static pressure pads 2a and 2b of the plurality of pairs of static pressure pads 2 described above. This is a case in which four pairs of static pressure pads indicated by A to D are placed in the cooling zone immediately below the top roll 32 with the hot-dip galvanized steel strip 26 interposed therebetween, and the compressed air sent out by the blower 4 causes the damper 5 to pass through. What passed through is supplied to the static pressure pad 2a on the front side (reference S) of the galvanized steel strip 26, and what passed through the damper 6 is supplied to the static pressure pad 2b on the back side (reference R) of the hot dip galvanized steel strip 26. It is being supplied.
【００１２】上述のように配置された静圧パッドに、ダ
ンパ５および６の開度を変化させて裏表に種々の圧力差
を与えた圧縮空気を供給するとともに、静圧パッドの溶
融亜鉛めっき鋼帯２６からの距離を種々変えたときの、
溶融亜鉛めっき鋼帯２６の振動の振幅の大きさと、振幅
の中心と本来のパスラインの中心とのズレ量とを測定
し、どのように圧力差を設けたときが振動を防止できる
かを評価した。[0012] To the static pressure pad arranged as described above, while supplying the compressed air having various pressure differences between the front and back by changing the opening of the dampers 5 and 6, the hot-dip galvanized steel of the static pressure pad is supplied. When changing the distance from the obi 26 variously,
The amplitude of the vibration of the hot-dip galvanized steel strip 26 and the amount of deviation between the center of the amplitude and the center of the original pass line were measured to evaluate how the pressure difference can prevent vibration. did.
【００１３】このときの操業条件、測定条件は次のとお
りである。 （１）ブロワ能力 １）風 量 ３０，０００Ｎｍ3／Ｈｒ ２）吐出圧 ４００ｍｍＨ2Ｏ （２）静圧パッド形状 図４に示すように、スリットギャップ（Ｇ）２５ｍｍ、
スリット幅（Ｗ）２，０００ｍｍ、スリット本数２本、
スリット間隔（Ｌ）２００ｍｍ （３）静圧パッドＡ，Ｂ，Ｃ，Ｄ各間の距離 ５ｍ （４）振動測定位置 静圧パッドＢとＣの中間点 （５）測定方法 レーザー式距離センサーThe operating conditions and measuring conditions at this time are as follows. (1) Blower capacity 1) Air volume 30,000 Nm 3 / Hr 2) Discharge pressure 400 mmH 2 O (2) Static pressure pad shape As shown in FIG. 4, slit gap (G) 25 mm,
Slit width (W) 2,000 mm, number of slits 2,
Slit interval (L) 200mm (3) Distance between each of the static pressure pads A, B, C and D 5m (4) Vibration measurement position Midpoint between static pressure pads B and C (5) Measurement method Laser distance sensor
【００１４】静圧パッド位置、ダンパー開度と、振幅お
よび振幅の中心と本来のパスラインの中心とのズレの関
係を表１に示す。表中評価の項の×は設定不良、〇はや
や良、◎は設定良好を示す。また、ズレの＋は表側への
ズレ、−は裏側へのズレを表す。Table 1 shows the relationship between the position of the static pressure pad, the degree of opening of the damper, the amplitude and the deviation between the center of the amplitude and the center of the original pass line. In the evaluation section in the table, x indicates poor setting, Δ indicates slightly good, and ◎ indicates good setting. In addition, + of the shift indicates a shift to the front side, and-indicates a shift to the back side.
【００１５】[0015]
【表１】 [Table 1]
【００１６】表１から明らかなように、溶融亜鉛めっき
鋼帯を挟んで対向する複数対のスリットノズル装置を溶
融亜鉛めっき鋼帯の進行方向に配列して設け、各々の対
向するスリットノズル装置間においては、溶融亜鉛めっ
き鋼帯に吹き付ける圧縮空気の圧力に差を設けるととも
に、溶融亜鉛めっき鋼帯の一方の面側の複数のスリット
ノズル装置から溶融亜鉛めっき鋼帯に吹き付けられる圧
縮空気の圧力の平均値が、他方の面側の複数のスリット
ノズル装置から溶融亜鉛めっき鋼帯に吹き付けられる圧
縮空気の圧力の平均値と、略等しいようにすることによ
り、溶融亜鉛めっき鋼帯の振幅が小さくかつパスライン
からのズレが小さくなり、溶融亜鉛めっき鋼帯の振動を
小さく抑えることができることがわかる。なお、実施例
ではスリットノズル装置として上下２本のスリットノズ
ルを設けた静圧パッドを使用する例で説明したが、スリ
ットノズル装置は、各々個別に圧力調整できるスリット
ノズルを用いて圧力差のある圧縮空気を直接溶融亜鉛め
っき鋼帯の両面に吹き付ける動圧を使用するものであっ
てもよい。As is clear from Table 1, hot-dip galvanizing
Fusing multiple pairs of slit nozzle devices facing each other across the steel strip
Arranged in the traveling direction of the galvanized steel strip.
Between the opposite slit nozzle devices
The pressure of the compressed air blown to the steel strip
The multiple slits on one side of the hot-dip galvanized steel strip
Pressure sprayed on hot-dip galvanized steel strip from nozzle device
When the average value of the compressed air pressure is
Pressure sprayed on hot-dip galvanized steel strip from nozzle device
By making it approximately equal to the average value of the compressed air pressure
The amplitude of the hot-dip galvanized steel strip is small and the pass line
Deviation from decreases, mow I to be able to suppress the vibration of the hot-dip galvanized steel strip. In the embodiment, two upper and lower slit nozzles are used as slit nozzle devices.
It has been described in example using a static pressure pad provided Le, Sri
Slit nozzles can be individually adjusted in pressure
Directly melts compressed air with a pressure difference using a nozzle
It is those that use the dynamic pressure spraying on both sides of the Kki steel strip
It may be.
【００１７】[0017]
【発明の効果】この発明により、溶融亜鉛めっき槽のシ
ンクロールからトップロール間を通過中の溶融亜鉛めっ
き鋼帯の振動を抑えることができる。According to the present invention, the vibration of the hot-dip galvanized steel strip passing between the sink roll and the top roll of the hot-dip galvanizing tank can be suppressed.
【図１】本発明の１実施例の溶融亜鉛めっき鋼帯の振動
防止方法に使用する静圧パッドの説明図である。FIG. 1 is an explanatory view of a hydrostatic pad used in a method for preventing vibration of a galvanized steel strip according to one embodiment of the present invention.
【図２】静圧パッドの配置位置を示す説明図である。FIG. 2 is an explanatory diagram showing an arrangement position of a static pressure pad.
【図３】本発明の１実施例の溶融亜鉛めっき鋼帯の振動
防止方法に使用する静圧パッドの配管系統図である。FIG. 3 is a piping system diagram of a hydrostatic pad used in the method for preventing vibration of a galvanized steel strip according to one embodiment of the present invention.
【図４】静圧パッドの寸法諸元を示す説明図である。FIG. 4 is an explanatory diagram showing dimensions of a static pressure pad.
【図５】合金化溶融亜鉛めっき鋼帯の製造工程を示す工
程図である。FIG. 5 is a process chart showing a manufacturing process of a galvannealed steel strip.
【図６】従来の静圧パッドを示す説明図である。FIG. 6 is an explanatory view showing a conventional static pressure pad.
１ スリットノズル ２ 静圧パッド（スリットノズル装置） ３ 冷却ノズル ４ ブロワ ５ ダンパ ６ ダンパDESCRIPTION OF SYMBOLS 1 Slit nozzle 2 Static pressure pad (slit nozzle device) 3 Cooling nozzle 4 Blower 5 Damper 6 Damper
フロントページの続き (56)参考文献 特開 昭57−79164（ＪＰ，Ａ) 特開 昭61−213363（ＪＰ，Ａ) 特開 平３−10055（ＪＰ，Ａ) 特開 昭56−84452（ＪＰ，Ａ)Continuation of front page (56) References JP-A-57-79164 (JP, A) JP-A-61-213363 (JP, A) JP-A-3-10055 (JP, A) JP-A-56-84452 (JP, A) , A)
Claims (1)
ル装置により圧縮空気を吹き付けて、溶融亜鉛めっき槽
のシンクロールからトップロールまでの間を通過する溶
融亜鉛めっき鋼帯の振動を防止する溶融亜鉛めっき鋼帯
の振動防止方法において、溶融亜鉛めっき鋼帯を挟んで
対向する複数対のスリットノズル装置を溶融亜鉛めっき
鋼帯の進行方向に配列して設け、各々の対向するスリッ
トノズル装置間においては、溶融亜鉛めっき鋼帯に吹き
付ける圧縮空気の圧力に差を設けるとともに、溶融亜鉛
めっき鋼帯の一方の面側の複数のスリットノズル装置か
ら溶融亜鉛めっき鋼帯に吹き付けられる圧縮空気の圧力
の平均値が、他方の面側の複数のスリットノズル装置か
ら溶融亜鉛めっき鋼帯に吹き付けられる圧縮空気の圧力
の平均値と、略等しいようにすることを特徴とする溶融
亜鉛めっき鋼帯の振動防止方法。1. A hot-dip galvanized steel strip is blown with compressed air to both sides by a slit nozzle device to prevent vibration of the hot-dip galvanized steel strip passing from a sink roll to a top roll of a hot-dip galvanized steel strip. In the method of preventing vibration of galvanized steel strip,
Hot dip galvanizing of multiple pairs of slit nozzle devices facing each other
They are arranged in the direction of travel of the steel strip, and
Between hot-dip galvanized steel strips
In addition to providing a difference in the pressure of the compressed air
Multiple slit nozzle devices on one side of plated steel strip?
Of compressed air blown on hot-dip galvanized steel strip
Is the average value of multiple slit nozzle devices on the other surface side?
Of compressed air blown on hot-dip galvanized steel strip
A method for preventing vibration of a hot-dip galvanized steel strip, wherein the method is substantially equal to the average value of
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3245718A JP2605521B2 (en) | 1991-09-25 | 1991-09-25 | Vibration prevention method for hot-dip galvanized steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3245718A JP2605521B2 (en) | 1991-09-25 | 1991-09-25 | Vibration prevention method for hot-dip galvanized steel strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0578806A JPH0578806A (en) | 1993-03-30 |
| JP2605521B2 true JP2605521B2 (en) | 1997-04-30 |
Family
ID=17137771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3245718A Expired - Fee Related JP2605521B2 (en) | 1991-09-25 | 1991-09-25 | Vibration prevention method for hot-dip galvanized steel strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2605521B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2796139B1 (en) * | 1999-07-06 | 2001-11-09 | Stein Heurtey | METHOD AND DEVICE FOR SUPPRESSING THE VIBRATION OF STRIPS IN GAS BLOWING ZONES, ESPECIALLY COOLING ZONES |
| JP4574040B2 (en) * | 2001-03-07 | 2010-11-04 | 新日本製鐵株式会社 | Vertical alloying furnace and operating method thereof |
| KR100802040B1 (en) * | 2001-08-27 | 2008-02-12 | 재단법인 포항산업과학연구원 | An apparatus for preventing a strip-vibration |
| KR101374348B1 (en) * | 2012-06-25 | 2014-03-14 | 주식회사 포스코 | Apparatus for keeping flatness of strip |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5779164A (en) * | 1980-10-06 | 1982-05-18 | Nippon Steel Corp | Polygonal nozzle type fluid pressure pad |
-
1991
- 1991-09-25 JP JP3245718A patent/JP2605521B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0578806A (en) | 1993-03-30 |
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