JPS6247086B2 - - Google Patents

Info

Publication number
JPS6247086B2
JPS6247086B2 JP10896780A JP10896780A JPS6247086B2 JP S6247086 B2 JPS6247086 B2 JP S6247086B2 JP 10896780 A JP10896780 A JP 10896780A JP 10896780 A JP10896780 A JP 10896780A JP S6247086 B2 JPS6247086 B2 JP S6247086B2
Authority
JP
Japan
Prior art keywords
rolled steel
hot
steel sheet
steel plate
spray pattern
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
Application number
JP10896780A
Other languages
Japanese (ja)
Other versions
JPS5732820A (en
Inventor
Takao Ikenaga
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.)
JFE Steel Corp
Original Assignee
Kawasaki 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP10896780A priority Critical patent/JPS5732820A/en
Publication of JPS5732820A publication Critical patent/JPS5732820A/en
Publication of JPS6247086B2 publication Critical patent/JPS6247086B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)

Description

【発明の詳細な説明】 本発明は熱間圧延鋼板（以下熱延鋼板と記す）
のスケール除去方法に関する。[Detailed Description of the Invention] The present invention relates to a hot-rolled steel plate (hereinafter referred to as a hot-rolled steel plate).
This invention relates to a method for removing scales.

熱延鋼板、特に熱延鋼帯を製造するラインにお
いては、熱延鋼帯の表面に生成するスケールを剥
離した後、圧延機にて圧延を行なう。この圧延に
おける仕上圧延機の入口側に設置されるスケール
除去装置の性能が悪い場合、製品に種々の弊害を
生ずる。この弊害の一つに熱延鋼板のビルトアツ
プがある。 In a line for manufacturing hot-rolled steel sheets, particularly hot-rolled steel strips, scale generated on the surface of the hot-rolled steel strip is peeled off, and then the hot-rolled steel strip is rolled in a rolling mill. If the performance of the scale removing device installed on the inlet side of the finishing mill during this rolling is poor, various problems will occur in the product. One of the disadvantages of this is the built-up of hot-rolled steel sheets.

熱延鋼板がデスケーリング中に、板幅方向に不
均一に冷却を受けると、それにもとづく板幅方向
の変形抵抗の不均一性が生じ、このような熱延鋼
板を圧延機にて圧延すると圧延機のロールが胴長
方向に不均一に摩耗する。 If a hot-rolled steel sheet is cooled unevenly in the width direction during descaling, the deformation resistance in the width direction will be non-uniform. Machine rolls wear unevenly along the length of the body.

このロール銅長方向の不均一の摩耗は以後の圧
延において板に転写され板長さ方向に沿つた縦筋
（この縦の部分は板厚が厚い）が発生し、後の工
程において種々の弊害をもたらす。スケール除去
装置による不均一冷却の原因としては、冷却水の
噴射ノズル配置に基づくものが多い。 This uneven wear in the lengthwise direction of the copper roll is transferred to the plate during subsequent rolling, resulting in vertical stripes along the length of the plate (the thickness of the plate is thicker in this vertical part), which can cause various problems in later processes. bring about. The cause of non-uniform cooling caused by the scale removal device is often due to the arrangement of the cooling water injection nozzles.

従来のスケール除去装置は第１図に示す如く構
成されていた。熱延鋼板１は搬送用ローラ２にて
矢印Ａ方向に搬送されながら、熱延鋼板１の上部
および下部に設置されたスケール除去用のヘツダ
（以下単にヘツダと記す）３，３′に設けたノズル
４，４′から噴射される冷却水によつてスケール
の除去が行なわれ、同時に冷却される。 A conventional scale removing device was constructed as shown in FIG. While the hot-rolled steel sheet 1 was being conveyed in the direction of arrow A by conveying rollers 2, the hot-rolled steel sheet 1 was placed in headers (hereinafter simply referred to as headers) 3 and 3' for scale removal installed at the upper and lower portions of the hot-rolled steel sheet 1. Scale is removed by the cooling water injected from the nozzles 4, 4', and cooling is performed at the same time.

５，５′は冷却水の噴射方向を示している。 5 and 5' indicate the cooling water injection direction.

ノズル４，４′から噴射される冷却水により熱
延鋼板上にできるスプレーパターンは、熱延鋼板
１を均一に冷却するために、第２図に示す如きス
プレーパターンにすることが多い。このためにノ
ズル４，４′はフラツトスプレー型のノズルを用
い、ノズル４，４′によるスプレーパターンを第
２図の如くにしている。いま、ノズル４のそれぞ
れのノズルをN1……NnとしてときノズルNiによ
るスプレーパターンCi−biはノズルNi−１のスプ
レーパターンbi−１〜ai−１と熱延鋼板１の搬送
方向Ａに沿つて熱延鋼板１の幅方向からみてラツ
プしている。そこで熱延鋼板１は幅方向にみて、
区間PiにおいてノズルNiによるスプレーパターン
bi−aiと、ノズルNiによるスプレーパターンCi＋
１〜bi＋１の２つのスプレーパターンによりデス
ケーリングおよび冷却されることになる。 The spray pattern formed on the hot-rolled steel sheet by the cooling water injected from the nozzles 4, 4' is often a spray pattern as shown in FIG. 2 in order to uniformly cool the hot-rolled steel sheet 1. For this purpose, flat spray type nozzles are used as the nozzles 4 and 4', and the spray pattern of the nozzles 4 and 4' is as shown in FIG. Now, assuming that each nozzle of the nozzle 4 is N1 ...Nn, the spray pattern Ci-bi by the nozzle Ni is the same as the spray pattern bi-1 to ai-1 of the nozzle Ni-1 along the conveying direction A of the hot rolled steel plate 1. When viewed from the width direction of the hot rolled steel sheet 1, the hot rolled steel sheet 1 is wrapped. Therefore, when looking at the hot rolled steel sheet 1 in the width direction,
Spray pattern by nozzle Ni in section Pi
Spray pattern Ci+ with bi-ai and nozzle Ni
It will be descaled and cooled by two spray patterns from 1 to bi+1.

また、熱延鋼板１の下部に配置されているノズ
ル４′を有するヘツダ３′と熱延鋼板１の下表面と
の間の距離は、テーブルローラ２により常に一定
値H1′に保たれているが、熱延鋼板１の上部に配
置されているヘツダ３と熱延鋼板１の上表面との
間の距離は、熱延鋼板１の板厚ｈによりH1−ｈ
となる。ここではH1はテーブルローラ２の上面
包絡線とヘツダ３の中心との間の距離であり、常
に一定である。 Further, the distance between the header 3' having the nozzle 4' disposed at the bottom of the hot-rolled steel plate 1 and the lower surface of the hot-rolled steel plate 1 is always maintained at a constant value H1' by the table roller 2. However, the distance between the header 3 placed on the top of the hot-rolled steel plate 1 and the upper surface of the hot-rolled steel plate 1 is H1-h due to the thickness h of the hot-rolled steel plate 1.
becomes. Here, H1 is the distance between the upper surface envelope of the table roller 2 and the center of the header 3, and is always constant.

このため熱延鋼板１の上表面とヘツダ３との間
の距離は熱延鋼板の板厚ｈにより変動することに
なる。そこで熱延鋼板１の上表面とヘツダ３との
間の距離が変化すると、ある板厚h0に対して第
２図に示すスプレーパターンが取れていても、厚
板ｈの変動により第３図に示す如くスプレーパタ
ーンが変化してしまう。第３図において、第３図
ａはｈ＜h0の場合の、第３図ｂはｈ＞h0の場合
のスプレーパターンを示している。 Therefore, the distance between the upper surface of the hot rolled steel plate 1 and the header 3 varies depending on the thickness h of the hot rolled steel plate. Therefore, if the distance between the upper surface of the hot-rolled steel plate 1 and the header 3 changes, even if the spray pattern shown in Fig. 2 is obtained for a certain plate thickness h0, the spray pattern shown in Fig. 3 will change due to variations in the thickness h0. As shown, the spray pattern changes. In FIG. 3, FIG. 3a shows the spray pattern when h<ho, and FIG. 3b shows the spray pattern when h>ho.

そこで熱延鋼板１の上表面のスプレーパターン
が熱延鋼板１の板厚により変化し、熱延鋼板１は
不均一な冷却を受けることになる。すなわち、第
３ａ図に示す如くｈ＜h0の場合には熱延鋼板１
の板幅方向からみて板幅方向にスプレーパターン
が三重にオーバーラツプするαの部分が生じ、二
重にオーバーラツプするβの部分と三重にオーバ
ーラツプする部分αとが交互に存在することにな
り、板幅方向に不均一な冷却の原因となる。 Therefore, the spray pattern on the upper surface of the hot-rolled steel sheet 1 changes depending on the thickness of the hot-rolled steel sheet 1, and the hot-rolled steel sheet 1 is subjected to non-uniform cooling. That is, as shown in Fig. 3a, when h<h0, the hot rolled steel plate 1
When viewed from the board width direction, there will be a part α where the spray pattern overlaps three times in the board width direction, and a part β where the spray pattern will overlap twice and a part α where there will be a triple overlap will exist alternately. This causes uneven cooling in the direction.

また、ｈ＞h0の場合はスプレーパターンのオ
ーバーラツプしないαの部分が生じ、２重にオー
バーラツプする部分βとオーバーラツプのない部
分αとが交互に存在することになり、板幅方向に
不均一な冷却の原因となる。 In addition, when h > h0, there will be a portion α in the spray pattern that does not overlap, and a portion β with double overlap and a portion α with no overlap will exist alternately, resulting in non-uniform cooling in the width direction of the sheet. It causes.

本発明は上記にかんがみなされたもので、熱延
鋼板の板厚の変化にかかわらず、常に均一な冷却
をともなう熱延鋼板のスケール除去方法を提供す
ることを目的とするものである。 The present invention has been conceived in view of the above, and an object of the present invention is to provide a method for removing scale from a hot-rolled steel sheet that always accompanies uniform cooling regardless of changes in the thickness of the hot-rolled steel sheet.

本発明方法は熱延鋼板１の板厚ｈに対応してヘ
ツダ４の位置を上下方向に熱延鋼板１の表面とヘ
ツダ４の間の距離が一定となるように移動させ
る。 In the method of the present invention, the position of the header 4 is moved in the vertical direction in accordance with the thickness h of the hot-rolled steel sheet 1 so that the distance between the surface of the hot-rolled steel sheet 1 and the header 4 is constant.

そこでヘツダ４の熱延鋼板１の上表面からの垂
直距離H1−ｈが常に一定になり、熱延鋼板１の
上下表面のスプレーパターンは第２図に示す如く
常に二重にオーバーラツプすることになり、不均
一な冷却は行なわれることはなくなり、熱延鋼板
１のビルトアツプは生じない。 Therefore, the vertical distance H1-h of the header 4 from the upper surface of the hot-rolled steel sheet 1 is always constant, and the spray patterns on the upper and lower surfaces of the hot-rolled steel sheet 1 always double overlap as shown in FIG. , nonuniform cooling is no longer performed, and no build-up of the hot-rolled steel sheet 1 occurs.

すなわち、いま、ノズルNiによるスプレーパ
ターンを第４図ａとすれば、ノズルNiによる単
独の冷却能力はスプレーパターン内の位置を横軸
にとつて示せば第４図ｂに示す如くになる。そこ
で第２図に示す如く総てのノズルからのスプレー
パターンが２重にオーバーラツプするときの冷却
能力は第４図ｃに示す如くになり、全体としての
トータル冷却能力は第４図ｃの破線に示す如く均
一となり、熱延鋼板のビルトアツプは生ずること
がない。 That is, if the spray pattern by the nozzle Ni is shown in FIG. 4a, the individual cooling capacity by the nozzle Ni is shown in FIG. 4b, with the position within the spray pattern taken as the horizontal axis. Therefore, when the spray patterns from all the nozzles double overlap as shown in Figure 2, the cooling capacity becomes as shown in Figure 4c, and the total cooling capacity as a whole is shown by the broken line in Figure 4c. As shown, it becomes uniform and no build-up of the hot rolled steel sheet occurs.

特は仕上圧延機の入口側における熱延鋼板１の
厚さが厚くなる現在の傾向にあつて、熱延鋼板１
の厚さの差は益々拡大しており、例えば板厚が25
mmから50mmまで変動すれば、噴射角60度のノズル
Niでは噴射パターンの長径は約29mm変動する。
この様な場合本発明方法は特に有効である。 In particular, with the current trend of increasing the thickness of the hot rolled steel sheet 1 on the inlet side of the finishing mill,
The difference in the thickness of
If it varies from mm to 50mm, a nozzle with a spray angle of 60 degrees
For Ni, the major axis of the injection pattern varies by approximately 29 mm.
In such cases, the method of the present invention is particularly effective.

以上説明した如く本発明によれば、熱延鋼板の
板厚が変つても熱延鋼板は不均一に冷却され、圧
延機のロール胴長方向の不均一摩耗はなくなり、
熱延鋼板の板長さ方向の縦筋の発生もなくなる。 As explained above, according to the present invention, even if the thickness of the hot rolled steel sheet changes, the hot rolled steel sheet is cooled unevenly, and uneven wear in the longitudinal direction of the roll body of the rolling mill is eliminated.
The occurrence of vertical stripes in the longitudinal direction of the hot-rolled steel sheet is also eliminated.

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

第１図は熱延鋼板のスケール除去装置の概要
図。第２図は熱延鋼板の表面のスプレーパターン
の一例を示す図。第３図は熱延鋼板の表面のスプ
レーパターンの他の例を示す図。第４図はノズル
の冷却能力の説明図。 １……熱延鋼板、２……テーブルローラ、３お
よび３′……ヘツダー、４および４′……ノズル。 Figure 1 is a schematic diagram of a scale removal device for hot-rolled steel sheets. FIG. 2 is a diagram showing an example of a spray pattern on the surface of a hot-rolled steel sheet. FIG. 3 is a diagram showing another example of a spray pattern on the surface of a hot-rolled steel sheet. FIG. 4 is an explanatory diagram of the cooling capacity of the nozzle. 1... Hot rolled steel plate, 2... Table roller, 3 and 3'... Header, 4 and 4'... Nozzle.

Claims (1)

【特許請求の範囲】[Claims] １ 複数のノズルを有するヘツダから熱間圧延鋼
板の表面に水を噴射して熱間圧延鋼板のスケール
を除去する熱間圧延鋼板のスケール除去方法にお
いて、熱延鋼板の表面から上ヘツダまでの距離を
熱間圧延鋼板の厚さにかかわらず常に一定となる
ようにヘツダを上下方向に移動させて鋼板表面の
噴射水パターンを一定に維持することを特徴とす
る熱間圧延鋼板のスケール除去方法。1 In a method for removing scale from a hot rolled steel plate by spraying water onto the surface of the hot rolled steel plate from a header having multiple nozzles, the distance from the surface of the hot rolled steel plate to the upper header A method for removing scale from a hot-rolled steel plate, characterized in that the water jet pattern on the surface of the steel plate is maintained constant by moving a header in the vertical direction so that the pattern is always constant regardless of the thickness of the hot-rolled steel plate.
JP10896780A 1980-08-08 1980-08-08 Scale removing method for hot rolled steel plate Granted JPS5732820A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10896780A JPS5732820A (en) 1980-08-08 1980-08-08 Scale removing method for hot rolled steel plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10896780A JPS5732820A (en) 1980-08-08 1980-08-08 Scale removing method for hot rolled steel plate

Publications (2)

Publication Number Publication Date
JPS5732820A JPS5732820A (en) 1982-02-22
JPS6247086B2 true JPS6247086B2 (en) 1987-10-06

Family

ID=14498196

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10896780A Granted JPS5732820A (en) 1980-08-08 1980-08-08 Scale removing method for hot rolled steel plate

Country Status (1)

Country Link
JP (1) JPS5732820A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19535789C2 (en) * 1995-09-26 1997-09-11 Hermetik Hydraulik Ab Device for descaling semi-finished products
KR100562639B1 (en) * 2001-11-20 2006-03-20 주식회사 포스코 hot rolling method of the stainless steels for descaling
TWI511809B (en) * 2011-02-25 2015-12-11 China Steel Corp Method and apparatus for deruring hot - rolled high - pressure fluid

Also Published As

Publication number Publication date
JPS5732820A (en) 1982-02-22

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