JPH01254302A - Thin sheet hot rolling equipment and rolling method - Google Patents
Thin sheet hot rolling equipment and rolling methodInfo
- Publication number
- JPH01254302A JPH01254302A JP31637788A JP31637788A JPH01254302A JP H01254302 A JPH01254302 A JP H01254302A JP 31637788 A JP31637788 A JP 31637788A JP 31637788 A JP31637788 A JP 31637788A JP H01254302 A JPH01254302 A JP H01254302A
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- rough rolling
- rolling mill
- mill
- rolled material
- 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.)
- Granted
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 327
- 238000000034 method Methods 0.000 title claims description 13
- 238000005098 hot rolling Methods 0.000 title claims description 10
- 230000002441 reversible effect Effects 0.000 claims abstract description 89
- 238000004804 winding Methods 0.000 claims abstract description 60
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 131
- 229910000975 Carbon steel Inorganic materials 0.000 claims 2
- 239000010962 carbon steel Substances 0.000 claims 2
- 239000000047 product Substances 0.000 description 24
- 230000005855 radiation Effects 0.000 description 9
- 238000005452 bending Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000271460 Crotalus cerastes Species 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B1/06—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing in a non-continuous process, e.g. triplet mill, reversing mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
- B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
- B21B1/34—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B2001/028—Slabs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
-
- 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
- B21B45/004—Heating the product
-
- 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
- B21B45/06—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 of strip material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、熱間スラブ材を減厚圧延して薄板製品を製造
する熱間薄板圧延設備、及び圧延方法に係わり、より詳
しくは、薄板製品を安価な設備費で製造する熱間薄板圧
延設備及び圧延方法に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a hot thin plate rolling equipment and a rolling method for producing thin plate products by rolling a hot slab material to a reduced thickness. The present invention relates to hot thin plate rolling equipment and a rolling method for manufacturing products at low equipment costs.
従来の熱間薄板製造設備は、スラブ材を粗圧延する数台
の粗圧延機よりなる粗圧延設備、及びこれに接続された
６〜７台の仕上圧延機により構成されていた。このよう
な設備は巨大な生産量向きの設備としては好適であるが
、設（ｉｉｆ費も膨大なものとなっている。Conventional hot thin plate production equipment has been comprised of a rough rolling equipment consisting of several rough rolling mills for rough rolling a slab material, and 6 to 7 finishing rolling mills connected to the rough rolling equipment. Although such equipment is suitable for large production volumes, the installation (IIF) costs are also enormous.
しかるに、最近では、生産量が大きくなり、小回りが効
き、かつ経済変動の影響を受は難い小規模設備の熱間圧
延設備、すなわちミニミルと呼称される設備を求める要
望が大となっている。However, recently, as the production volume increases, there is a growing demand for small-scale hot rolling equipment that is flexible and less susceptible to economic fluctuations, that is, equipment called a mini-mill.
その様なミニミル設備の代表的な例は、例えば特開昭５
８−２０２９０６号公報に開示されている。この熱間圧
延設備では、粗圧延設備が１台の可逆粗圧延機で構成さ
れ、仕上圧延設備が２台の仕上圧延機と、この２台の仕
上圧延機の前後に設けられた巻取機とで構成されており
、仕上圧延の段階では、これらの巻取機で圧延材を巻き
取り、且つ該巻取機から巻き戻しながら薄板製品が製造
される。この圧延設備は、配置される圧延機の総台数が
、従来の圧延設備に比較して１／３〜１／４となってお
り、経済的な設備である。A typical example of such mini-mill equipment is, for example, the JP-A-5
It is disclosed in the publication No. 8-202906. In this hot rolling equipment, the rough rolling equipment consists of one reversible rough rolling mill, and the finishing rolling equipment consists of two finishing rolling mills and winding machines installed before and after these two finishing rolling mills. In the finishing rolling stage, the rolled material is wound up by these winding machines and unrolled from the winding machines to produce a thin plate product. This rolling equipment is an economical equipment because the total number of rolling mills installed is 1/3 to 1/4 compared to conventional rolling equipment.
いかしながら、この設備では、圧延材を支持するテーブ
ル設備が長大であること、及びテーブル長が長いことに
起因してテーブル設備上での熱間圧延材からの放熱によ
る該圧延材の温度低下が無視できないことなどの欠点が
ある。However, in this equipment, the table equipment that supports the rolled material is long, and due to the long table length, the temperature of the rolled material may decrease due to heat dissipation from the hot rolled material on the table equipment. There are drawbacks that cannot be ignored.
また、この特開昭５８−２０２９０６号公報に開示の圧
延設備では、次のような欠点がある。Furthermore, the rolling equipment disclosed in JP-A-58-202906 has the following drawbacks.
すなわち、最も生産量が多い低炭素鋼材の熱間圧延では
、一般に、圧延材の温度が９００℃以上の高温に保たれ
る必要があるので、酸化スケールが発生しやすい、仮に
、低炭素鋼の熱間圧延に特開昭５８−２０２９０６号公
報に開示の熱間圧延設備を用いようとすると５通常、仕
上圧延段階での圧延材の長さが約３００〜９００ｍ、仕
上圧延速度が約３００〜６００ｍ／ｍｉｎであるので、
前記の巻き取り・巻き戻しの１パス当りの圧延時間は約
６０〜１８０秒とかなり長くなる。従って、巻き取り・
巻き戻しつつ行われる仕上圧延段階においても、ストリ
ップ表面に厚い酸化スケールが発生するのを避は難い。In other words, in hot rolling of low carbon steel, which is the most produced material, it is generally necessary to maintain the temperature of the rolled material at a high temperature of 900°C or higher, so oxidation scale is likely to occur. When trying to use the hot rolling equipment disclosed in JP-A-58-202906 for hot rolling, the length of the rolled material at the finish rolling stage is usually about 300 to 900 m, and the finish rolling speed is about 300 to 300 m. Since it is 600m/min,
The rolling time per pass of the above-mentioned winding and unwinding is approximately 60 to 180 seconds, which is quite long. Therefore, winding and
Even in the finish rolling stage, which is performed while unwinding, it is difficult to avoid the formation of thick oxide scale on the surface of the strip.
この酸化スケールを取り除いて圧延しない場合、スケー
ルが母材に喰い込むので、板表面品質が悪化し、商品価
値が低下してしまう虞れがある。If this oxidized scale is not removed and rolled, the scale will dig into the base material, resulting in deterioration of the plate surface quality and a risk of lowering the commercial value.
これを防止するには、１５０ ｋｇ／ｃｄ程度の高圧の
冷却水をストリップの表面に噴射して、スケールを破砕
させて吹き飛ばすデスケリーングと呼ばれる作業を行う
必要がある。しかしながら、仕上圧延段階では圧延材の
板厚が数ｍ以下程度の薄い板厚となっているので、上記
のようなデスケリーング作業を仕上圧延パス毎に繰り返
して行うと、圧延材の温度が低炭素鋼材の熱間圧延に要
求される温度よりも極端に低下してしまい、所定の品質
の製品が得られない虞れがある。To prevent this, it is necessary to perform an operation called descaling, in which high-pressure cooling water of about 150 kg/cd is injected onto the surface of the strip to crush and blow away the scale. However, in the finish rolling stage, the thickness of the rolled material is as thin as several meters or less, so if the above descaling work is repeated for each finish rolling pass, the temperature of the rolled material will decrease to a low carbon level. The temperature is extremely lower than that required for hot rolling of steel materials, and there is a risk that a product of predetermined quality may not be obtained.
何故ならば、Ａｒａ変態点く圧延鋼材中の炭素の含有率
により異なるが、約９００’Ｃ程度）以下の温度では、
オーステナイト和からα相への変態が生じ、適正な仕上
圧延を行い難くなるので正常な製品を製造することがで
きないからである。This is because at temperatures below the Ara transformation point (which varies depending on the carbon content in the rolled steel material, but is about 900'C),
This is because transformation from austenite sum to α phase occurs, making it difficult to perform proper finish rolling, making it impossible to manufacture a normal product.
以上のように、従来の圧延方式では２つの欠点があった
。As mentioned above, the conventional rolling method has two drawbacks.
以上の理由の詳細に付いて代表的な製品板厚２．５ｍ程
度の薄板製品を製造する場合について説明する。ミニミ
ルに於ける圧延素材としてのスラブ材の厚みは通常８０
〜２２ｏＩＩＩＩＩ内に分布し、各製造所により任意の
ものが選ばれる。Regarding the details of the above reasons, a case where a typical thin plate product having a thickness of about 2.5 m is manufactured will be explained. The thickness of slab material used as rolled material in mini mill is usually 80mm.
~22oIII, and any one is selected by each manufacturer.
しかしながら、スラブ材の板厚がどのように選定されよ
うとも、粗圧延機で可逆圧延されることにより、この圧
延機での最終３パスは概路次のように行われる。However, no matter how the thickness of the slab material is selected, it is reversibly rolled in a rough rolling mill, and the final three passes in this rolling mill are performed roughly as follows.
すなわち２２０１ＩＩ１１の通常の厚みのスラブが使用
される場合、始めは１パス当り約３０１１Ｉ１１程度ず
つ減厚量で圧延が行われるが、終段パスでは圧下量を始
めは減しながら、圧延材の板厚が、例えば、最終パスの
２パス前の正パス圧延では８０ｒｒＩ＠→５２ａａ、次
の逆パスでは５２１ｍ→２５膣、最終圧パスでは２５ｍ
ｍ→１２１ｍとなるように、圧延材が減厚圧延され、後
続する仕上圧延機に送られる。In other words, when a slab with a normal thickness of 2201II11 is used, rolling is performed with a thickness reduction of about 3011I11 per pass at the beginning, but in the final pass, the thickness of the rolled material is reduced while reducing the thickness at the beginning. For example, the thickness is 80rrI@→52aa in the forward pass rolling two passes before the final pass, 521m→25mm in the next reverse pass, and 25mm in the final pressure pass.
The rolled material is rolled to reduce its thickness so that the thickness becomes 121 m → 121 m, and then sent to the subsequent finishing mill.
一方、通常製品コイルのｌｌｍ１１１当りの製品重量は
１５ｋｇ／ｗ＋程度のものが要求されるから、最終パス
の２パス前の圧延では、すなわち前述の板厚５２ｍｍに
減厚する正パス圧延では、圧延材長は、３６．７ ｍ、
次の逆パス圧延では板厚が２５ ｎｎで圧延材長が７６
．４ｎｎになる。On the other hand, the product weight per 111 mm of the product coil is usually required to be about 15 kg/w+, so in the rolling two passes before the final pass, that is, in the positive pass rolling to reduce the plate thickness to 52 mm, the rolling The length of the material is 36.7 m.
In the next reverse pass rolling, the plate thickness is 25 nn and the rolled material length is 76 mm.
．． It will be 4nn.
そして、最終パスでは板厚が１２ｎｎで圧延材長は１５
９ＩｌＩ１１となる。In the final pass, the plate thickness was 12 nn and the rolled material length was 15 nn.
9IlI11.
この中、最終パスの２パス前の板厚５２ｍｍの正パス圧
延では板厚も厚く、かつ圧延材長も短いので圧延材の温
度が低下する度合いはあまり問題とならない。Among these, in the normal pass rolling with a thickness of 52 mm two passes before the final pass, the thickness of the plate is thick and the length of the rolled material is short, so the degree to which the temperature of the rolled material decreases does not matter much.
しかしながら、次の逆パス圧延では板厚が２５ｍと薄く
、且つ圧延材長も大である。すなわちこのパスでは前記
圧延材長７６．４ｎｎの圧延材を支持し得る長大なテー
ブル設備が必要である。且つ板厚が２５ｎｎと薄く冷え
易くなっているにも拘らず、当該逆パス圧延時は勿論、
次の最終パス時にも、この長いテーブル上の圧延材表面
から、最終圧延が終了するまで放冷され、圧延材の温度
が低下する問題がある。However, in the next reverse pass rolling, the plate thickness is as thin as 25 m, and the length of the rolled material is also large. That is, this pass requires a long table facility capable of supporting the rolled material having a length of 76.4 nn. In addition, although the plate thickness is as thin as 25 nn and easily cools, of course during the reverse pass rolling,
During the next final pass, the surface of the rolled material on this long table is allowed to cool until the final rolling is completed, causing a problem in which the temperature of the rolled material decreases.
次の仕上圧延では、第１回の圧延で１２ｍから２スタン
ドの圧延で６ｍ程度に減厚され、出側の巻取機に巻き取
られる。In the next finish rolling, the thickness is reduced from 12 m in the first rolling to about 6 m in two stands of rolling, and the material is wound up on a winder on the exit side.
更に１次の段階では、出側の巻取機の圧延材を巻き戻し
、入側巻取機で巻き取りなから２スタンドの圧延で３．
８ｍｎ程度に減厚圧延を行う。最終圧延では入側巻取機
に巻き取られた圧延材を巻き戻しながら２台の仕上圧延
スタンドで連続圧延を行イ、２．５ａａ程度或いはこれ
以下の厚みに圧延して製品を得る。Furthermore, in the first stage, the rolled material from the exit winder is unwound, and then rolled up by the input winder.
Rolling is performed to reduce the thickness to about 8 mm. In the final rolling, the rolled material taken up by the entry winder is continuously rolled on two finishing rolling stands while being unwound, and rolled to a thickness of about 2.5 aa or less to obtain a product.
このような場合に、巻取機で巻き取り、且つ巻き戻し圧
延するまでの時間は前述のように６０〜１８０秒の長い
時間に及ぶので、ストリップ表側にスケールが生じるの
は、さけ難い。従って１巻き戻し圧延をする度毎に高圧
の冷却水を噴射してデスケリーングを行う必要がある。In such a case, it takes a long time from 60 to 180 seconds to wind the strip in the winder and unwind and roll it, so it is difficult to avoid scale formation on the front side of the strip. Therefore, it is necessary to perform descaling by injecting high-pressure cooling water every time one unwinding and rolling is performed.
このデスケリーングのために、ストリップの温度が９０
０ｍ程度。For this descaling, the temperature of the strip is 90°C.
About 0m.
又はその以下に低下してしまうと、適正な圧延製品が得
られなくなる。If it falls below that level, a proper rolled product cannot be obtained.
尚、タンデム式仕上げ圧延機の２つの隣接スタンド間で
は、通常、被圧延材の大気中への暴露時間が短いので、
発生する酸化膜は薄く、デスケリーングの必要はない。In addition, since the exposure time of the rolled material to the atmosphere between two adjacent stands of a tandem finishing rolling mill is usually short,
The oxide film generated is thin and does not require descaling.
尚、従来、ホットタンデム圧延機と呼ばれる圧延設備も
知られている。Note that rolling equipment called a hot tandem rolling mill is also conventionally known.
ホットタンデム圧延機の最も簡単な例は、−台の粗圧延
機とその下流側にタンデム状に配置された６〜７台のタ
ンデム式仕上圧縮機とからなる。The simplest example of a hot tandem rolling mill consists of a rough rolling mill and six to seven tandem finishing compressors arranged in tandem on the downstream side thereof.
このホットタンデム圧延機では、圧延材は、２２０ｍの
厚さから３０ｎｎ＋程度の厚さまで一台の粗圧延機で可
逆的に繰り返し圧延された後、タンデム式仕上圧延機で
一気に最終製品厚さに圧延される。In this hot tandem rolling mill, the rolled material is reversibly rolled repeatedly in one rough rolling mill from a thickness of 220 m to a thickness of about 30 nn+, and then rolled all at once to the final product thickness in a tandem finishing mill. be done.
この場合も、粗圧延の各パスと仕上タンデムミルの入側
でデスケリーングがなされるがこれらの段階では板厚が
大きく圧延材の温度低下は少ない。In this case as well, descaling is performed at each pass of rough rolling and at the entry side of the finishing tandem mill, but at these stages the plate thickness is large and the temperature drop of the rolled material is small.
そしてタンデムミルの板厚の薄くなったスタンド間では
デスケリーングが不要で圧延材の温度低下を防ぎつつ薄
い製品を製造し得る。Furthermore, descaling is not required between the stands where the plate thickness of the tandem mill is reduced, and thin products can be manufactured while preventing the temperature of the rolled material from decreasing.
しかし、この種のホットタンデム圧延機では。But in this kind of hot tandem rolling machine.
正方向の最終粗圧延が行われる直前に逆方向の粗圧延パ
スで得られる圧延材が極端に長くなり粗圧延機入側に長
大なテーブル設備を設ける必要が生じるのを避けるべく
当該圧延材の厚みを３０ｍ＋程度以上の相当大きい厚み
に選択するので、この３０ｎＩ１１１程度の厚みを所望
製品厚みまで減厚するために要する仕上圧延機の台数が
多くなり、経済的でない。Immediately before the final rough rolling in the forward direction, the rolled material obtained in the rough rolling pass in the reverse direction becomes extremely long, and in order to avoid the need to install a long table facility at the entrance of the rough rolling mill, the rolled material is Since the thickness is selected to be quite large, about 30 m+ or more, the number of finishing mills required to reduce the thickness of about 30 nI111 to the desired product thickness increases, which is not economical.
本発明は前記諸点に鑑み成されたものであり、その目的
とするところは、上記の可逆粗圧延に於ける最終パス前
の逆圧延のために長大なテーブル設備を設ける必要がな
いコンパクトな熱間薄板圧延設備、及び比較的低コスト
で製造熱間圧延を行い得る熱間薄板圧延方法を提供する
にある。The present invention has been made in view of the above points, and its purpose is to provide a compact heat treatment system that eliminates the need for a long table facility for reverse rolling before the final pass in the above-mentioned reversible rough rolling. It is an object of the present invention to provide an intermediate thin plate rolling equipment and a hot thin plate rolling method capable of performing manufacturing hot rolling at relatively low cost.
前記した目的は、スラブ材を順次減厚圧延して。 The above purpose is to sequentially reduce the thickness of the slab material.
熱間薄板を製造すべく、粗圧延設備と該粗圧延設備の下
流側に設けられた仕上圧延設備とを有する熱間薄板圧延
設備において、粗圧延！２ｆｉ！の圧延機が正逆パスの
圧延が可能な可逆圧延機からなり。In order to manufacture hot thin plates, a hot thin plate rolling facility having a rough rolling facility and a finishing rolling facility provided downstream of the rough rolling facility performs rough rolling! 2fi! The rolling mill consists of a reversible rolling mill that is capable of rolling in forward and reverse passes.
当該可逆粗圧延機の入側に圧延材の巻き取り、及び巻き
戻しを行うための巻取手段が配置されている熱間薄板製
造設備、並びに圧延材に対して可逆粗圧延機で正逆パス
の粗圧延を少なくとも一回行った後、該可逆粗圧延機か
ら逆パス圧延されて出て来る圧延材を該可逆粗圧延機の
入側に設けた巻取手段でコイル状に巻き取り、その後該
巻き取り手段からコイルを巻き戻しつつ当該可逆粗圧延
機で最終の正パス粗圧延を行うと共に、該最終の正パス
粗圧延機からでてくる圧延材を仕上圧延機で減厚圧延を
行い熱間薄板製品を製造する熱間薄板圧延方法によって
達成される。A hot thin plate production facility in which a winding means for winding and unwinding the rolled material is arranged on the entry side of the reversible rough rolling mill, and a forward and reverse pass for the rolled material in the reversible rough rolling mill. After performing rough rolling at least once, the rolled material that is reverse pass rolled and comes out of the reversible rough rolling mill is wound into a coil shape by a winding means provided on the entry side of the reversible rough rolling mill, and then While unwinding the coil from the winding means, a final positive pass rough rolling is performed in the reversible rough rolling mill, and the rolled material coming out of the final positive pass rough rolling mill is subjected to thickness reduction rolling in a finishing rolling mill. This is accomplished by a hot sheet rolling method to produce hot sheet products.
又、前記仕上圧延設備は複数台のスタンドをタンデム状
に配置してなり、１パスで仕上圧延するように構成され
た仕上圧延機からなる熱間薄板圧延設値、及び該設備を
用いる方法によって上記目的に加えて、更に、熱間圧延
されるべき圧延材が適正温度以下に低下する虞れが少な
く、且つコンパクトな熱間薄板圧延設備、及び比較的低
コストで製造熱間圧延を行い得る熱間薄板圧延方法が得
られる。仕上圧延機は、好ましくは出側に近接して配置
された例えば２〜４台の圧延スタンドより構成されるタ
ンデムミルからなる。Further, the finishing rolling equipment has a plurality of stands arranged in tandem, and has a finishing rolling machine configured to perform finishing rolling in one pass, and a method of using the equipment. In addition to the above objects, there is less risk that the temperature of the rolled material to be hot rolled will drop below the appropriate temperature, and compact hot sheet rolling equipment and production hot rolling can be carried out at relatively low cost. A hot sheet rolling method is obtained. The finishing mill preferably consists of a tandem mill comprising, for example, 2 to 4 rolling stands arranged close to the exit side.
そして、本発明の効果を更に拡大する場合には、粗圧延
機の出側にも巻取手段が設けられる。In order to further expand the effects of the present invention, a winding means is also provided on the outlet side of the rough rolling mill.
また、この巻取及び巻き戻し可能な巻取手段には、必要
に応じ、コイル状圧延材の温度低下を抑制するための保
温手段が設けられてもよい。この保温手段は、コイルか
らの放熱を防止するための防熱カバー、あるいはコイル
に熱量を供給する加熱装置からなる。Further, the winding means capable of winding and unwinding may be provided with a heat retaining means for suppressing a temperature drop of the coiled rolled material, if necessary. This heat retaining means consists of a heat insulating cover for preventing heat radiation from the coil, or a heating device that supplies heat to the coil.
本発明では、初めは巻取手段を利用せずに、粗圧延機で
スラブ材を所定の厚みに圧延する。最も普通の２２０ｍ
厚のスラブ材が用いられる場合、正逆圧延を数パス行い
、圧延材を約３０ａｍ以下の厚みにした後、粗圧延機の
入側に（そして場合によっては出側にも）設置された巻
取手段で圧延材を巻き取りながら圧延を行い、次いで該
巻取手段から巻き戻しながら継続パスの圧延を行う。In the present invention, the slab material is initially rolled to a predetermined thickness using a rough rolling mill without using a winding means. The most common 220m
When a thick slab material is used, several passes of forward and reverse rolling are performed to reduce the thickness of the rolled material to approximately 30 am or less. Rolling is performed while winding up the rolled material with the take-up means, and then continuous pass rolling is performed while unwinding from the take-up means.
粗圧延機の入側のみに巻取手段が設けられている場合に
は、粗圧延の最終パスの直前の逆パス粗圧延時のみに巻
き取られる。そして最終パスでは、上記巻取手段から圧
延材を巻き戻しながら仕上圧延機の方向に圧延材を送る
ように正パス圧延を行う。If the winding means is provided only on the entry side of the rough rolling mill, the winding is performed only during reverse pass rough rolling immediately before the final pass of rough rolling. In the final pass, forward pass rolling is performed in such a way that the rolled material is sent in the direction of the finishing mill while being unwound from the winding means.
前述の可逆圧延機での逆パス圧延時の圧延材をコイル状
に巻取るため、圧延材を展開する長大なテーブルは不要
になると共に、圧延材が圧延中コイル状に巻き取られる
ので放熱が少なく、結局圧延材の温度低下を少なくする
ことができる。Since the rolled material during reverse pass rolling in the reversible rolling mill described above is wound into a coil, a long table for rolling out the rolled material is not required, and heat dissipation is improved because the rolled material is wound into a coil during rolling. As a result, the temperature drop of the rolled material can be reduced.
また１巻き取りコイルからの放熱を少なくするための保
温手段として、例えばコイル放熱防止用断熱カバーを設
けることにより、放熱防止効果を尚−層増大させること
ができる。Further, by providing a heat insulating cover for preventing heat radiation from the coil as a heat retaining means for reducing heat radiation from the one-turn coil, the heat radiation prevention effect can be further increased.
尚、繰り返して圧延を行う粗圧延段階では、圧延材表面
にスケールが発生するので、前述のデスケリーングを行
う。このデスケリーングの際板状圧延材の温度が大巾に
低下するのを避けるべく、板状圧延材の粗圧延機での減
厚には限度がある。In the rough rolling stage where rolling is repeated, scale is generated on the surface of the rolled material, so the above-described descaling is performed. In order to avoid a large drop in the temperature of the plate-shaped rolled material during descaling, there is a limit to the thickness reduction of the plate-shaped rolled material in the rough rolling mill.
従って、可逆粗圧延機による粗圧延は、最終の粗圧延の
１パス前の圧延の後で該圧延を終えた直後に入側巻取手
段によって巻き取られる圧延材の厚みが、好ましくは、
薄くとも約６画描度以上になるように選択乃至設定され
る。Therefore, in rough rolling by a reversible rough rolling mill, the thickness of the rolled material that is wound up by the entrance winding means immediately after the rolling one pass before the final rough rolling is preferably as follows:
It is selected or set to have at least about 6 degrees of drawing.
最終粗圧延以前の粗圧延作業が全て完了した後に、最終
の粗圧延用圧パスと、仕上圧延パスとを直結して一気に
行う。この場合、仕上圧延パスは、粗圧延機の出側に直
列に設けられた２〜４台の仕上タンデムミルで行われる
。After all the rough rolling operations before the final rough rolling are completed, the final rough rolling rolling pass and the finishing rolling pass are directly connected and performed at once. In this case, the finishing rolling pass is performed by two to four finishing tandem mills installed in series on the exit side of the rough rolling mill.
この最終圧延パス作業では通常のタンデムミルのように
速い速度で圧延が行われるので、スタンド間でのデスケ
リーングは不要である。すなわち、本発明の場合、デス
ケリーングによって過度に冷却される虞れのある圧延材
が薄くなった後の段階で、デスケリーングが不要である
ので、圧延材の温度が極端に低下する虞れがない。In this final rolling pass operation, rolling is performed at a high speed like in a normal tandem mill, so descaling between stands is not necessary. That is, in the case of the present invention, there is no need for descaling at a stage after the rolled material becomes thinner, which would otherwise be excessively cooled by descaling, so there is no risk of the temperature of the rolled material becoming extremely low.
以上のように、本発明では、粗圧延機の入側のみ、或い
は入側と出側との両方に巻取手段を設けて、粗圧延機で
圧延材の温度低下を効果的に防ぎつつ圧延材をより薄い
製品厚みにするように減厚を行うので、従来のホットタ
ンデム圧延機と比較して、仕上タンデムミルのスタンド
数を約半分又は半分以下にし得る。As described above, in the present invention, a winding means is provided only on the input side of the rough rolling mill, or on both the input side and the output side, so that the rough rolling mill can effectively prevent the temperature of the rolled material from decreasing while rolling it. Since the thickness is reduced so that the material has a thinner product thickness, the number of stands of the finishing tandem mill can be reduced by about half or less than that of a conventional hot tandem rolling mill.
本発明の第１の実施例を第１図から第３図を参照しつつ
説明する。第１図において例えば低炭素鋼からなる素材
は連鋳機により製造される。A first embodiment of the present invention will be described with reference to FIGS. 1 to 3. In FIG. 1, a material made of, for example, low carbon steel is manufactured by a continuous casting machine.
即ち、タンデイツシュ１からの溶湯をノズル２を経て、
鋳型３に注湯し、注湯された溶湯４を冷却することによ
り、連続的に鋳片５が製造される。That is, the molten metal from the tundish 1 passes through the nozzle 2,
By pouring molten metal into a mold 3 and cooling the poured molten metal 4, slabs 5 are continuously manufactured.
このような連鋳機では各種の寸法の鋳片５が’ｉｔ！２
造されるが１代表的な例として比較的薄い８０ｍｎ厚の
鋳片５が製造される場合について述べる。鋳片５の幅は
７００〜１３００ｎｎ８度、鋳造速度は２〜５ｍ／ｌｌ
１ｉｎである。In such a continuous casting machine, slabs 5 of various sizes can be cast! 2
As a typical example, a case where a relatively thin slab 5 of 80 mm in thickness is manufactured will be described. The width of the slab 5 is 700~1300nn8 degrees, and the casting speed is 2~5m/ll.
It is 1 inch.
次に、この連鋳片５は剪断機６により所定の長さに切断
される。単位幅当り製品重量１５ｋｇ／ｒＭｎ程度のも
のでは２０〜３０ｍ間の長さに切断される。Next, this continuous cast piece 5 is cut into a predetermined length by a shearing machine 6. A product with a product weight of about 15 kg/rMn per unit width is cut into lengths of 20 to 30 m.
剪断機６には、上下刃１１ａ、ｌｌｂが刃物台９．１ｏ
に設けられている。上刃１１ａがシリンダ８の圧力下で
下降させられ鋳片５を切断することにより、スラブ７が
得られる。尚、鋳片５の切断中、剪断機６はピン６ａを
支点として、シリンダ１３により鋳造鋳片５の速度と同
期して鋳片進行方向に送られ切断作業が行われる。In the shearing machine 6, the upper and lower blades 11a and llb are mounted on a tool rest 9.1o.
It is set in. The slab 7 is obtained by lowering the upper blade 11a under the pressure of the cylinder 8 and cutting the slab 5. During the cutting of the slab 5, the shearing machine 6 is sent by the cylinder 13 in the advancing direction of the cast slab 5 in synchronization with the speed of the cast slab 5, with the pin 6a as a fulcrum, and the cutting operation is performed.
剪断されたスラブ７は炉１４内のテーブルローラ１５に
より搬送される。炉１４では、スラブ７からの放熱を防
止するほかに、必要に応じて加熱エネルギーを供給して
スラブ７の加熱を行ってもよい。The sheared slab 7 is conveyed by table rollers 15 within the furnace 14. In the furnace 14, in addition to preventing heat radiation from the slab 7, heating energy may be supplied to heat the slab 7 as necessary.
上記スラブ７は次に可逆粗圧延機２４により正逆圧延が
行われる。本図ではこの可逆圧延機に１対の作業ロール
及び１対の補強ロールを有する４段圧延機を用いている
が、勿論、目的により２段圧延機あるいは６段圧延機を
使用してもよい。The slab 7 is then subjected to forward and reverse rolling by a reversible rough rolling mill 24. In this figure, a 4-high rolling mill with a pair of work rolls and a pair of reinforcing rolls is used as the reversible rolling mill, but of course, a 2-high rolling mill or a 6-high rolling mill may be used depending on the purpose. .
本実施例では、この可逆粗圧延機２４の入側に２本の下
ベンディングローラ１９、及び１本の上ベンディングロ
ーラ２１の合計３本のローラ寄りなる圧延材曲げローラ
装置とコイル支持ローラ２２より構成される巻き取り手
段としての巻取装置６５が何えられている。In this embodiment, a rolled material bending roller device consisting of two lower bending rollers 19 and one upper bending roller 21 on the entrance side of the reversible rough rolling mill 24 and a coil support roller 22 are installed. A winding device 65 as a winding means is changed.
尚、第１パスの正パス時には、下ベンディングローラ１
９は、これらのローラ１９を支持するフレーム６１及び
ガイド板２ｏと共に、ブラケット１７に設けられた支点
６ｏを中心にして、シリンダ１８により回転されて、第
１図に示さる待機位置に下降せしめられており、圧延材
２７の通過を案内する。Note that during the first pass, the lower bending roller 1
9 is rotated by a cylinder 18 about a fulcrum 6o provided on the bracket 17 together with a frame 61 and a guide plate 2o that support these rollers 19, and is lowered to the standby position shown in FIG. and guides the passage of the rolled material 27.
尚、第１パスの正パス圧延中、圧延材が放熱により冷え
るのを防止するために、粗圧延機２４の出側に放熱防止
炉２５が設けられている。この炉２５内にもテーブルロ
ーラ２６が設けられ、圧延材２７の搬送を行う、第１正
パス圧延により板厚は５２ｍｍ程度に減厚される。この
正パス圧延の間、粗圧延機２４の入側（正パスの際の入
側の意味）及び出側（正パスの際の出側の意味）で且つ
圧延材移動経路の上下に設けられた１組のノズル９１゜
９０から１５０ｋｇ／ａＪ程度の高圧の水が圧延材２７
の両面に吹き付けられ、圧延材２７の表面のスケールを
吹き飛ばすデスケリーングが行われる。A heat radiation prevention furnace 25 is provided on the outlet side of the rough rolling mill 24 in order to prevent the rolled material from cooling down due to heat radiation during the first pass of normal pass rolling. Table rollers 26 are also provided within this furnace 25, and the rolled material 27 is conveyed through first positive pass rolling to reduce the plate thickness to approximately 52 mm. During this normal pass rolling, rollers are provided at the entry side (input side during normal pass) and exit side (meaning exit side during normal pass) of the rough rolling mill 24 and above and below the rolling material movement path. A set of nozzles 91°90 to 150 kg/aJ high pressure water is applied to the rolled material 27.
Descaling is performed to blow off scale on the surface of the rolled material 27.
第１正パスが終了した後、逆パス圧延が第２図に従って
行われる。このパスでは、圧延材２７は、その厚さが５
２ｎｎ＋から２５膿程度になるように減厚圧延される。After the first normal pass is completed, reverse pass rolling is performed according to FIG. 2. In this pass, the rolled material 27 has a thickness of 5
The thickness is reduced to about 2nn+ to 25mm.
第２図の逆パス圧延において、下ベンディングローラ１
９及びガイド板２０は第２図に示されるようにシリンダ
１８により上方に、即ち逆パス圧延後の圧延材２７を巻
き取るための位ｎにリフトアップされる。In the reverse pass rolling shown in Fig. 2, the lower bending roller 1
9 and the guide plate 20 are lifted upward by the cylinder 18, that is, to a position n for winding up the rolled material 27 after reverse pass rolling, as shown in FIG.
そして、圧延材２７を逆方向に送り粗圧延機２４で圧延
し、圧延した後の板２７は、下ベンディングローラ１９
と、上ベンディングローラ２１により円弧状乃至コイル
状に曲げられながら矢印Ｂ方向に送られてコイル２３が
形成される。このコイル２３はコイル支持ローラ２２に
より支持される。この逆パス圧延の際にも、ノズル９０
゜９１を介してデスケリーングが行われる。Then, the rolled material 27 is sent in the opposite direction and rolled by the rough rolling mill 24, and the plate 27 after rolling is rolled by the lower bending roller 19.
Then, the coil 23 is bent by the upper bending roller 21 into an arc shape or a coil shape and sent in the direction of the arrow B, thereby forming the coil 23. This coil 23 is supported by a coil support roller 22. During this reverse pass rolling, the nozzle 90
Descaling is performed via .degree.91.
以上の逆パス圧延が終了した後、最終パスの正パス圧延
が第３図に示すように行われる。After the above reverse pass rolling is completed, the final pass of normal pass rolling is performed as shown in FIG. 3.
コイル２３は粗圧延機２４が巻き戻され、圧延後薄くな
った材料３１に対しては最終組圧延と同時に仕上げ圧延
機２８により仕上圧延が行われ、熱間薄板製品３２が得
られる。かつ矢印方向に送られガイドローラ２９により
ガイドされ巻取胴４６に巻かれ、製品コイルが得られる
。この段階では、ノズル９０．９１のみならずノズル９
２がらの高圧水によってデスケリーングが行われる。The coil 23 is unwound by a rough rolling mill 24, and the material 31 that has become thinner after rolling is subjected to finish rolling by a finishing mill 28 at the same time as final set rolling, to obtain a hot sheet product 32. The coil is sent in the direction of the arrow, guided by guide rollers 29, and wound around a winding drum 46 to obtain a product coil. At this stage, not only the nozzles 90 and 91 but also the nozzles 9
Descaling is performed using two sets of high-pressure water.
尚、仕上圧延機２８の３つの圧延スタンド間では圧延材
が短時間で通過するのでデスケリーングは必要ない。Note that descaling is not necessary because the rolled material passes between the three rolling stands of the finishing rolling mill 28 in a short time.
本発明の熱間薄板圧延設備でのデスケリーングは、粗圧
延及び仕上圧延共に板厚が１．大きい状態でデスケリー
ングを行うので、前記特開昭５８−２０２９０６号公報
に開示の設備を用いる場合と比較して、圧延材の温度低
下を大巾に抑制し得る。In the descaling in the hot thin plate rolling equipment of the present invention, the plate thickness is 1.5 mm in both rough rolling and finish rolling. Since descaling is performed in a large state, the temperature drop in the rolled material can be greatly suppressed compared to the case of using the equipment disclosed in JP-A-58-202906.
第３図において、仕上圧延機は３台配置されているが、
この台数は、勿論、製品板厚の大小に応じて増減しても
よい。In Figure 3, three finishing mills are arranged.
Of course, this number may be increased or decreased depending on the thickness of the product board.
例えば、粗圧延機２４の最終パスでの圧延後に得られる
板３１の厚みが１２１１Ｉ１１程度で、この圧延材３１
から仕上圧延により２．５ｍｍの代表的な板厚の圧延板
製品３２を得る場合には３台の仕上圧延機を配置すれば
よい。For example, if the thickness of the plate 31 obtained after rolling in the final pass of the rough rolling mill 24 is about 1211I11, this rolled material 31
In order to obtain a rolled plate product 32 having a typical plate thickness of 2.5 mm by finish rolling, three finish rolling mills may be arranged.
圧延速度は粗圧延機で７５ｍ／ｗｉｎ、最終仕上用圧延
機で３６Ｑｍ／ｗｉｎ程度である。The rolling speed is about 75 m/win in the rough rolling mill and 36 Qm/win in the final finishing mill.
尚、以上においては、可逆圧延機２４によって素材スラ
ブ厚８０ｎｏのものを圧延する例について説明したが、
勿論８０ｍｍより厚いスラブ７を用いて、３パスより多
い圧延パスで粗圧延を行ってもよい。In the above, an example has been described in which a material slab having a thickness of 80 mm is rolled by the reversible rolling mill 24.
Of course, rough rolling may be performed using more than three rolling passes using a slab 7 thicker than 80 mm.
例えば、スラブ７の厚みが１２０ｍとすれば。For example, if the thickness of the slab 7 is 120 m.
第１の正パスで１００ｎｎ、第２の逆パスで８０調まで
圧延してもよい。It may be rolled to 100 nn in the first forward pass and to 80 nn in the second reverse pass.
しかしく板厚が１００ｍｍから８０ｍへの）！＆初の逆
パス圧延では圧延後に得られる圧延材の板厚が厚く、か
つ板長も短いので、放熱量も無視できるため、巻取機６
５による巻取は行わない。通常、単位幅当りの重量は、
スラブ素材厚みにかかわらず同じなので、スラブ厚が大
である程、板長が短いからである。However, the plate thickness increased from 100mm to 80m)! & In the first reverse pass rolling, the thickness of the rolled material obtained after rolling is thick and the length is short, so the amount of heat dissipation can be ignored, so the winder 6
Winding according to step 5 is not performed. Usually, the weight per unit width is
This is the same regardless of the thickness of the slab material, so the greater the slab thickness, the shorter the board length.
以上の圧延後、板厚が１２０ｎｎから８０ｍｍになった
後は前述したのと同じプロセスで圧延を行えばよい。After the above-mentioned rolling, after the plate thickness is changed from 120 nn to 80 mm, rolling may be performed in the same process as described above.
スラブ７の板厚が更に大きい場合でも、板厚が３０ｍｍ
程度になるまでは、巻取は行われず、単に減厚のための
可逆圧延が行われる。そして、板厚が３０ｍｍ程度にな
ったところで入側巻取機６５で巻き取られ、その後前述
と同様にして圧延される。Even if the plate thickness of slab 7 is larger, the plate thickness is 30 mm.
Until the thickness is reached, no winding is performed, and reversible rolling is simply performed to reduce the thickness. Then, when the plate thickness reaches about 30 mm, it is wound up by the entry side winder 65, and then rolled in the same manner as described above.
尚１以上の説明図で示した粗圧延機の入側の巻取機６５
は、下方から上方に巻き取るアップ・コイラー（ｕ ｐ
−ｃｏｉｌｅｒ）方式の巻取機の例であった。しかし、
巻取機６５としては、ドラムを用いるもの、あるいはス
テレコ（Ｓｔｅｌｅｃｏ ：登録商標）方式のように上
方から下方に巻き取るものなど各種の他のものでもよい
。Note that the winder 65 on the entry side of the rough rolling mill shown in the above explanatory drawings
is an up coiler (u p
-coiler) type winder. but,
The winding machine 65 may be of various types, such as one using a drum or one that winds up from the top to the bottom like a Stereco (registered trademark) system.
第４図には、スラブの厚みが、８０ｎｍより厚い場合、
例えば１１０〜２２０Ｉｆｆ１等の場合に使用される別
の実施例を示す。すなわち、この第４図の圧延設備は、
２台の可逆粗圧延機３５．３６ （勿論２台以上の設置
可能）を有しており、正方向。FIG. 4 shows that when the thickness of the slab is thicker than 80 nm,
Another example used in the case of, for example, 110-220Iff1 will be shown. In other words, the rolling equipment shown in Fig. 4 is
It has two reversible rough rolling mills 35, 36 (of course more than two can be installed), and the rolling mill is forward facing.
逆方向および最終の正方向の、合計３方向の圧延により
、より大きな圧下量を得ようとする場合に使用される。It is used when attempting to obtain a larger reduction amount by rolling in a total of three directions, the reverse direction and the final forward direction.
この正逆圧の圧延により合計６パスの圧延が行われる。A total of 6 passes of rolling are performed by this forward and reverse rolling.
スラブ７の厚みが１２０ｎｎであれば、この６パスの圧
延により、６〜１０１１Ｉ１１程度の板厚の圧延材に減
厚できる。そして、最終粗圧延パスは仕上圧延２８と連
続して行われ、板厚１．７〜２．５閣の製品が製造され
得る。If the thickness of the slab 7 is 120 nn, the thickness can be reduced to a rolled material having a thickness of about 6 to 1011I11 by rolling these six passes. Then, the final rough rolling pass is performed continuously with the finish rolling 28, and a product having a plate thickness of 1.7 to 2.5 mm can be manufactured.
尚、第４図に使用されている粗圧延機３５゜３６の入側
に配置された巻取機６５のコイル２３は保温手段として
の保温ボックス７０によりカバーされコイルからの熱放
散防止が図られている。Incidentally, the coil 23 of the winder 65 disposed on the inlet side of the rough rolling mill 35° 36 used in FIG. ing.
尚、第４図では、下ベンディングローラ１９の昇降機構
は図示されていないが、第１図に示すものと同じものが
使用される。Although the elevating mechanism for the lower bending roller 19 is not shown in FIG. 4, the same mechanism as shown in FIG. 1 is used.
第５図には、本発明による好ましい別の実施例の熱間薄
板圧延設備を示す。すなわちこの場合には、可逆粗圧延
機３５の入側および出側の各々に巻き戻し兼用巻取機７
１．７２を備え、正パス時も巻取機７２で巻き取りを行
い、圧延材からの放熱を防止するようにしている。そし
て、所定の板厚に粗圧延後の板は、次に仕上圧延機３８
により一点鎖線で示すように圧延されて、熱間薄板製品
が製造される。FIG. 5 shows another preferred embodiment of hot sheet rolling equipment according to the present invention. In other words, in this case, there are unwinding and winding machines 7 on each of the inlet side and the outlet side of the reversible rough rolling mill 35.
1.72, and winding is performed by the winder 72 even during the normal pass to prevent heat radiation from the rolled material. The plate after rough rolling to a predetermined thickness is then passed through a finishing mill 38.
The sheet is rolled as shown by the dashed line to produce a hot sheet product.
尚、第５図に示されるように粗圧延機３５の入側及び出
側の両方に巻取機７１．７２を設ける場合、粗圧延機３
５での板厚を更に薄くし得る。その圧延例を次に示す。In addition, as shown in FIG.
The plate thickness at No. 5 can be made even thinner. An example of the rolling is shown below.
板厚の大きいスラブから粗圧延ロール３５により繰返し
圧延されて約３０ｍｍの板厚になった際、板（圧延材）
が初めて入側の巻取機７１で巻き取られるようにする。When a thick slab is repeatedly rolled by the rough rolling roll 35 to a thickness of about 30 mm, the plate (rolled material)
is wound up by the winding machine 71 on the entry side for the first time.
そして、圧延材は１次の正パスで１７ｎｎ程度に圧延さ
れ、粗圧延ロール３５の出側の巻取機７２で巻き取られ
る。Then, the rolled material is rolled to about 17 nn in the first normal pass, and wound up by the winder 72 on the exit side of the rough rolling roll 35.
更に、圧延材は、次の逆圧延パスでは９ｍに圧延され入
側の巻取機７１に巻き取られ、最終組パスでは巻取ｆｉ
７１から巻き戻されながら６．５ｎｎ程度に圧延される
。このとき、粗圧延機３５は仕上圧延機２８と連動され
、粗圧延機３５から出た圧延材は直ちに仕上圧延機２８
に送られ仕上圧延機２８で圧延されて、厚さ２．０ｍｍ
程度の製品が得られる。Furthermore, in the next reverse rolling pass, the rolled material is rolled to 9 m and wound on the winder 71 on the entry side, and in the final set pass, the rolled material is rolled to a length of 9 m.
While unwinding from 71, it is rolled to about 6.5 nn. At this time, the rough rolling mill 35 is linked with the finishing rolling mill 28, and the rolled material coming out of the rough rolling mill 35 is immediately moved to the finishing rolling mill 28.
It is sent to the finishing mill 28 and rolled to a thickness of 2.0 mm.
A product of about 100% can be obtained.
この圧延設備では、粗圧延ｆｉ３５と仕上圧延機２８と
の間を圧延材が走行する際の圧延材からの放熱を少なく
抑えるべく粗圧延機３５と仕上圧延機２８とが近接して
配置されている。In this rolling equipment, the rough rolling mill 35 and the finishing rolling mill 28 are arranged close to each other in order to suppress heat radiation from the rolled material when the rolled material runs between the roughing rolling fi 35 and the finishing rolling mill 28. There is.
そして、巻取機７２で巻き取ることなく粗圧延を行う場
合には、仕上圧延機２８の中まで圧延材が到達すること
もあるが、このときは、仕上圧延機２８の上下ロール間
の間隙を大きく開いて圧延材が該間隙を自由に出入され
得るようにする。従って、設備の全長は更に短くされ得
る。When rough rolling is performed without winding with the winder 72, the rolled material may reach the inside of the finishing rolling mill 28, but in this case, there is a gap between the upper and lower rolls of the finishing rolling mill 28. The gap is wide open so that the rolled material can freely move in and out of the gap. Therefore, the overall length of the installation can be further reduced.
第６図には、熱間薄板圧延設備に用いられる仕上圧延設
備の別の例を示す。本図において仕上圧延機３７は１台
配置され、これは可逆的に運転される。勿論この圧延機
の台数は複数台、あるいはそれ以上でもよい。FIG. 6 shows another example of finishing rolling equipment used in hot thin plate rolling equipment. In this figure, one finishing mill 37 is arranged, and this is operated reversibly. Of course, the number of rolling mills may be plural or more.
仕上圧延機３７の前後にはコイル巻き戻し兼用巻取機８
０．８１が備えられている。粗圧延後の圧延材２７は初
めに仕上圧延機３７によって正パス圧延されてピンチロ
ーラ４２より巻取ドラム４５にコイル４４状に巻き取ら
れる。次に、逆パスの圧延が行われ、圧延された材料は
ピンチローラ４１によりドラム４０にコイル３９として
巻き取られる。このようにして所定の板厚になるまで繰
り返し圧延された後、最後は正パス圧延されつつ一点鎖
線で示すようにガイドローラ２９側に送出され、ドラム
４６に製品コイル３０のように巻き取られる。Before and after the finishing rolling mill 37, there is a winding machine 8 for coil unwinding.
0.81 is provided. The rolled material 27 after rough rolling is first subjected to normal pass rolling by a finishing mill 37 and then wound into a coil 44 by a pinch roller 42 on a winding drum 45 . Next, reverse pass rolling is performed, and the rolled material is wound around drum 40 as coil 39 by pinch rollers 41. After being repeatedly rolled in this way until a predetermined thickness is achieved, the plate is finally rolled in a normal pass and sent out to the guide roller 29 side as shown by the dashed line, where it is wound around a drum 46 like a product coil 30. .
なお、仕上圧延機３７の前後に設けられる巻取機のコイ
ル３９．４４は保温の面からボックス３８．４３により
カバーされる。Incidentally, the coils 39.44 of the winding machine provided before and after the finishing rolling mill 37 are covered by boxes 38.43 from the standpoint of heat retention.
このような本実施例では、粗圧延機の入側に圧延材を巻
き取り且つ巻き戻す事が可能な巻取機を配置することに
より以下に示す効果が得られた。In this example, the following effects were obtained by disposing a winder capable of winding and unwinding the rolled material on the entry side of the rough rolling mill.
１、ｆｆｌ圧延機での逆パス後の板材を巻き取ることに
より、逆パス後の圧延材を展開するための粗圧延機入側
への長大なテーブル設備が不要となり、スペース及び設
備費の節約が可能となった。1. By winding up the plate material after the reverse pass in the ffl rolling mill, there is no need for a long table facility on the entry side of the roughing mill to unroll the rolled material after the reverse pass, saving space and equipment costs. became possible.
２、粗圧延機での逆パス後の圧延材は、逆パス中の圧延
、及び次の正パス中の圧延期間中、（従来技術の場合）
圧延材表面からの放熱が行われるが、本発明のようにコ
イル状に巻き取ることにより放熱を低減し、圧延材の温
度低下を防止できた。従来技術の場合、通常テーブルロ
ーラに圧延材を展開すると１秒間に２度低下する。2. The rolled material after the reverse pass in the rough rolling mill is rolled during the reverse pass and during the rolling period during the next forward pass (in the case of conventional technology)
Heat is dissipated from the surface of the rolled material, but by winding the material into a coil as in the present invention, heat dissipation can be reduced and a drop in temperature of the rolled material can be prevented. In the case of the conventional technology, when a rolled material is normally spread on a table roller, the temperature decreases by 2 degrees per second.
そして逆パス圧延と次の正パス圧延が終了するまでには
約６０秒必要なので合計では１２０度程変温度が低下す
る。したがって従来技術ではこの温度低下分だけ素材ス
ラブの初期温度を高めておく必要があった。Since it takes about 60 seconds to complete the reverse pass rolling and the next forward pass rolling, the variable temperature decreases by about 120 degrees in total. Therefore, in the prior art, it was necessary to increase the initial temperature of the material slab by the amount of this temperature drop.
これに対して、本発明の場合、圧延材がコイル材に巻き
取られるので、１秒間当たりの温度低下は０．２度以下
となり、圧延材の温度低下は無視できるものとなり、多
大の省エネルギー効果が得られた。In contrast, in the case of the present invention, since the rolled material is wound up into a coiled material, the temperature drop per second is 0.2 degrees or less, and the temperature drop in the rolled material is negligible, resulting in a large energy-saving effect. was gotten.
３、更に、粗圧延機の入側及び出側の両方に巻取機を配
置することにより、粗圧延機で圧延されて得られる板（
圧延材）の厚さがより薄くされ得、この粗圧延機に後続
して設けられるスタンド数を従来の約半分以下にし得る
。3. Furthermore, by arranging winders on both the entry and exit sides of the rough rolling mill, the plate obtained by rolling with the rough rolling mill (
The thickness of the rolled material (rolled material) can be made thinner, and the number of stands provided subsequent to this rough rolling mill can be reduced to about half or less than the conventional number.
以上のように１本発明では、粗圧延機の少なくとも入側
に巻取機が設けられ圧延材が巻き取られるようになって
いるので、テーブル長を短くし、圧延材の冷却を抑制し
得、前記粗圧延設備の特徴（効果）のために粗圧延機の
出側に配置されるタンデム式仕上げ圧延機の圧延スタン
ドの台数が少なくされてもタンデム式仕上げ圧延機の圧
延スタンド間でのデスケリーングが不要となり、圧延材
の温度低下が避けられ得、表面品質の優れた熱間圧延薄
板が製造され得る。As described above, in the present invention, a winder is provided at least on the entry side of the rough rolling mill to wind up the rolled material, so the table length can be shortened and cooling of the rolled material can be suppressed. , Due to the features (effects) of the rough rolling equipment, even if the number of rolling stands of the tandem finishing mill placed on the exit side of the rough rolling mill is reduced, descaling between the rolling stands of the tandem finishing rolling mill is still possible. is not necessary, a drop in the temperature of the rolled material can be avoided, and a hot rolled thin plate with excellent surface quality can be produced.
第１図は本発明の好ましい第１実施例の熱間薄板圧延設
備により正パス圧延状況を示す断面説明図、第２図は第
１図の設備で逆パス圧延実施状況を示す断面説明図、第
３図は第１図の設備で最終圧パス圧延状況を示す断面説
明図、第４図は粗圧延機を２台使用する本発明による好
ましい他の実施例の熱間薄板圧延設備による圧延状況を
示す断面説明図、第５図は粗圧延機の入側及び出側に各
各巻数機を配置する場合の本発明による好ましい別の実
施例の熱間薄板圧延設備の断面説明図、第６図は仕上げ
圧延に可逆圧延機を使用する場合の本発明による別の実
施例の熱間薄板圧延設備の断面説明図である。FIG. 1 is a cross-sectional explanatory diagram showing a forward pass rolling situation using the hot thin plate rolling equipment according to the first preferred embodiment of the present invention, and FIG. 2 is a cross-sectional explanatory diagram showing a reverse pass rolling situation using the equipment shown in FIG. 1. Fig. 3 is a cross-sectional explanatory diagram showing the final pass rolling situation in the equipment shown in Fig. 1, and Fig. 4 is the rolling situation in a hot thin plate rolling equipment according to another preferred embodiment of the present invention using two rough rolling mills. FIG. 5 is a cross-sectional explanatory view of a hot thin plate rolling equipment according to another preferred embodiment of the present invention in which each winding machine is arranged on the inlet and outlet sides of a rough rolling mill. The figure is a cross-sectional explanatory view of another embodiment of hot thin plate rolling equipment according to the present invention when a reversible rolling mill is used for finish rolling.
Claims (1)
く、粗圧延設備と該粗圧延設備の下流側に設けられた仕
上圧延設備とを備えた熱間薄板圧延設備において、前記
粗圧延設備の圧延機が正逆パスの圧延が可能な可逆圧延
機からなり、当該可逆粗圧延機の入側に圧延材の巻き取
り、及び巻き戻しを行う巻取手段が配置されていること
を特徴とする熱間薄板圧延設備。 ２、前記仕上圧延設備は複数台のスタンドをタンデム状
に配置してなり、１パスで仕上圧延するように構成され
た仕上圧延機からなることを特徴とする請求項１記載の
熱間薄板製造設備。 ３、前記巻取手段に巻き取られた圧延材の温度低下を抑
えるべく、保温手段が巻取機に設けられていることを特
徴とする請求項１記載の熱間薄板圧延設備。 ４、炭素鋼からなるスラブ材を順次減厚圧延して、熱間
薄板を製造すべく、粗圧延設備と該粗圧延設備の下流側
に設けられた仕上圧延設備とを備えた熱間薄板圧延設備
において、前記粗圧延設備の圧延機が正逆パスの圧延が
可能な可逆圧延機からなり、当該可逆粗圧延機の入側に
圧延材の巻き取り及び巻き戻しを行う巻取手段が配置さ
れていると共に、前記仕上圧延設備が複数台のスタンド
をタンデム状に配置されており、かつ、１パスで仕上圧
延するように構成された仕上圧延機からなることを特徴
とする熱間薄板圧延設備。 ５、前記粗圧延機で正パス圧延された圧延材を巻き取り
、且つ逆パス圧延のために圧延材の巻き戻しを行う巻取
手段を可逆粗圧延機の出側に設置したことを特徴とする
請求項４記載の熱間薄板圧延設備。 ６、スラブ材を順次減厚圧延して、熱間薄板を製造すべ
く、粗圧延設備と該粗圧延設備の下流側に設けられた仕
上圧延設備とを備えた熱間薄板圧延設備において、前記
粗圧延設備の圧延機が正逆パスの圧延が可能な可逆圧延
機からなり、当該可逆粗圧延機の入側、及び出側のそれ
ぞれに圧延材の巻き取り、及び巻き戻しを行う巻取手段
が配置されていることを特徴とする熱間薄板圧延設備。 ７、前記仕上圧延設備は複数台のスタンドをタンデム状
に配置してなり、１パスで仕上圧延するよう構成された
仕上圧延機からなることを特徴とする請求項６記載の熱
間薄板圧延設備。 ８、前記巻取機に巻き取られた圧延材の温度低下を抑え
るべく、保温手段が巻取機に設けられていることを特徴
とする請求項６記載の熱間薄板圧延設備。 ９、前記粗圧延機に対して導入・送出される圧延材のス
ケールを取り除くためのデスケリーング手段が該粗圧延
機の入側、及び出側に設けられていることを特徴とする
請求項６記載の熱間薄板圧延設備。 １０、圧延材に対して可逆粗圧延機で正逆パスの粗圧延
を少なくとも一回行つた後、該可逆粗圧延機から逆パス
圧延されて出て来る圧延材を該可逆粗圧延機の入側に設
けた巻取手段でコイル状に巻き取り、その後該巻き取り
手段からコイルを巻き戻しつつ当該可逆粗圧延機で最終
の正パス粗圧延を行うと共に、該最終の正パス粗圧延機
からでてくる圧延材を仕上圧延機で減厚圧延を行い熱間
薄板製品を製造することを特徴とする熱間薄板圧延方法
。 １１、前記可逆粗圧延機で正逆パスの粗圧延を複数回行
つた後、該可逆粗圧延機で逆パス圧延された圧延材を該
可逆粗圧延機の入側に設けた巻取手段でコイル状に巻き
取ることを特徴とする請求項１０記載の熱間薄板圧延方
法。 １２、炭素鋼製の圧延材に対して可逆粗圧延機で正逆パ
スの粗圧延を少なくとも一回行つた後、該可逆粗圧延機
から逆パス圧延されて出て来る圧延材を該可逆粗圧延機
の入側に設けた巻取手段でコイル状に巻き取り、その後
該巻取手段からコイルを巻き戻しつつ当該可逆粗圧延機
で最終の正パス粗圧延を行うと共に、該最終の正パス粗
圧延機から出て来る圧延材を仕上圧延機で減厚圧延を行
い熱間薄板製品を製造することを特徴とする熱間薄板圧
延方法。 １３、圧延材に対して可逆粗圧延機で正逆パスの粗圧延
を少なくとも一回行つた後、該可逆粗圧延機から正パス
圧延されて出て来る圧延材を該可逆粗圧延機の出側に設
けた出側巻取手段でコイル状に巻き取り、次に該出側巻
き取り手段からコイルを巻き戻しつつ当該可逆粗圧延機
で逆パス粗圧延を行いながら該逆パス圧延された出て来
る圧延材を可逆粗圧延機の入側に設けた入側巻取手段で
コイル状に巻き取り、その後該入側巻取手段からコイル
を巻き戻しつつ当該可逆圧延機で最終の正パス粗圧延を
行うと共に、該最終の正パス粗圧延機からでてくる圧延
材を仕上圧延機で減厚圧延し熱間薄板製品を製造するこ
とを特徴とする熱間薄板圧延方法。[Claims] 1. A hot rolling mill equipped with a rough rolling facility and a finish rolling facility provided downstream of the rough rolling facility, in order to manufacture hot thin plates by sequentially rolling slab materials to reduce their thickness. In the thin plate rolling equipment, the rolling mill of the rough rolling equipment comprises a reversible rolling mill capable of rolling in forward and reverse passes, and a winding means for winding and unwinding the rolled material on the entry side of the reversible rough rolling mill. A hot thin plate rolling facility characterized in that: 2. The hot thin plate manufacturing according to claim 1, wherein the finishing rolling equipment is a finishing rolling mill configured to have a plurality of stands arranged in tandem and finish rolling in one pass. Facility. 3. The hot thin plate rolling equipment according to claim 1, wherein the winder is provided with a heat retaining means to suppress a temperature drop of the rolled material taken up by the winding means. 4. Hot thin plate rolling equipped with a rough rolling facility and a finishing rolling facility installed downstream of the rough rolling facility, in order to manufacture hot thin plates by sequentially rolling slabs made of carbon steel to reduce their thickness. In the equipment, the rolling mill of the rough rolling equipment is a reversible rolling mill capable of rolling in forward and reverse passes, and a winding means for winding and unwinding the rolled material is disposed on the entry side of the reversible rough rolling mill. and the finishing rolling equipment comprises a finishing mill having a plurality of stands arranged in tandem and configured to carry out finish rolling in one pass. . 5. A winding means for winding up the rolled material subjected to forward pass rolling in the rough rolling mill and unwinding the rolled material for reverse pass rolling is installed on the exit side of the reversible rough rolling mill. The hot thin plate rolling equipment according to claim 4. 6. In a hot thin plate rolling facility equipped with a rough rolling facility and a finish rolling facility provided downstream of the rough rolling facility, in order to manufacture a hot thin plate by sequentially rolling a slab material to a reduced thickness, the above-mentioned The rolling mill of the rough rolling equipment consists of a reversible rolling mill capable of rolling in forward and reverse passes, and a winding means for winding and unwinding the rolled material at the entrance and exit sides of the reversible rough rolling mill, respectively. A hot thin plate rolling facility characterized in that: 7. The hot thin plate rolling equipment according to claim 6, wherein the finishing rolling equipment is a finishing rolling mill configured to have a plurality of stands arranged in tandem and finish rolling in one pass. . 8. The hot thin plate rolling equipment according to claim 6, wherein the winder is provided with a heat retaining means to suppress a drop in the temperature of the rolled material taken up by the winder. 9. Claim 6, characterized in that descaling means for removing scale from the rolled material introduced into and delivered to the rough rolling mill are provided on the entry side and exit side of the rough rolling mill. hot thin plate rolling equipment. 10. After rough rolling the rolled material in forward and reverse passes at least once in a reversible rough rolling mill, the rolled material that has been reverse pass rolled and comes out of the reversible rough rolling mill is input into the reversible rough rolling mill. The coil is wound into a coil with a winding means provided on the side, and then the final normal pass rough rolling is performed on the reversible rough rolling mill while unwinding the coil from the winding means. A hot thin plate rolling method characterized in that the resulting rolled material is rolled to reduce its thickness in a finishing mill to produce a hot thin plate product. 11. After performing rough rolling in forward and reverse passes a plurality of times in the reversible rough rolling mill, the rolled material subjected to reverse pass rolling in the reversible rough rolling mill is rolled with a winding means provided on the entry side of the reversible rough rolling mill. 11. The hot thin plate rolling method according to claim 10, wherein the hot sheet rolling method comprises winding the sheet into a coil. 12. After rough rolling a rolled material made of carbon steel at least once in a forward and reverse pass in a reversible rough rolling mill, the rolled material that has been reverse pass rolled and comes out of the reversible rough rolling mill is subjected to the reversible rough rolling. The coil is wound into a coil by a winding means provided on the entry side of the rolling mill, and then the coil is unwound from the winding means and the final normal pass rough rolling is performed in the reversible rough rolling mill. A hot thin plate rolling method characterized in that a rolled material coming out of a rough rolling mill is rolled to reduce its thickness in a finishing rolling mill to produce a hot thin plate product. 13. After rough rolling the rolled material in forward and reverse passes at least once in a reversible rough rolling mill, the rolled material that has been rolled in the forward pass and comes out of the reversible rough rolling mill is rolled. The coil is wound into a coil by an exit winding means provided on the side, and then the reverse pass rolled product is rolled while being unwinded from the exit winding means and subjected to reverse pass rough rolling in the reversible rough rolling mill. The rolled material to be rolled is wound into a coil shape by an inlet winding means provided on the inlet side of the reversible rough rolling mill, and then, while unwinding the coil from the inlet winding means, the material is subjected to a final normal pass roughing in the reversible rolling mill. 1. A method for hot thin plate rolling, characterized in that while rolling, the rolled material coming out of the final positive pass rough rolling mill is rolled to reduce its thickness in a finishing mill to produce a hot thin plate product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63316377A JP2735258B2 (en) | 1987-12-18 | 1988-12-16 | Hot strip rolling equipment and rolling method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-318888 | 1987-12-18 | ||
| JP31888887 | 1987-12-18 | ||
| JP63316377A JP2735258B2 (en) | 1987-12-18 | 1988-12-16 | Hot strip rolling equipment and rolling method |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7304060A Division JP2798024B2 (en) | 1995-11-22 | 1995-11-22 | Hot rolling equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01254302A true JPH01254302A (en) | 1989-10-11 |
| JP2735258B2 JP2735258B2 (en) | 1998-04-02 |
Family
ID=26568635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63316377A Expired - Lifetime JP2735258B2 (en) | 1987-12-18 | 1988-12-16 | Hot strip rolling equipment and rolling method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2735258B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0523728A (en) * | 1991-07-12 | 1993-02-02 | Kawasaki Steel Corp | Method for hot rolling |
| US6280542B1 (en) | 1996-06-07 | 2001-08-28 | Corus Technology Bv | Method and apparatus for the manufacture of a steel strip |
| US6533876B1 (en) | 1996-12-19 | 2003-03-18 | Corus Staal | Process and device for producing a steel strip or sheet |
| CN111804729A (en) * | 2020-07-06 | 2020-10-23 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for producing medium and extra-thick plates through steel plate blanks under high-performance prepressing |
| CN114669606A (en) * | 2020-12-24 | 2022-06-28 | 宝山钢铁股份有限公司 | Internally cooled steel plate interruption prevention control method and rolling line |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59137107A (en) * | 1983-01-25 | 1984-08-07 | ティッピンズ・インコ−ポレ−テッド | Rolling method and apparatus using reversal rolling machinesconnected in close vicinity to each other and double stand finishing rolling machine lines |
| JPS61283411A (en) * | 1985-06-07 | 1986-12-13 | Nippon Kokan Kk <Nkk> | Descaling method for hot rolling |
-
1988
- 1988-12-16 JP JP63316377A patent/JP2735258B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59137107A (en) * | 1983-01-25 | 1984-08-07 | ティッピンズ・インコ−ポレ−テッド | Rolling method and apparatus using reversal rolling machinesconnected in close vicinity to each other and double stand finishing rolling machine lines |
| JPS61283411A (en) * | 1985-06-07 | 1986-12-13 | Nippon Kokan Kk <Nkk> | Descaling method for hot rolling |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0523728A (en) * | 1991-07-12 | 1993-02-02 | Kawasaki Steel Corp | Method for hot rolling |
| US6280542B1 (en) | 1996-06-07 | 2001-08-28 | Corus Technology Bv | Method and apparatus for the manufacture of a steel strip |
| US6533876B1 (en) | 1996-12-19 | 2003-03-18 | Corus Staal | Process and device for producing a steel strip or sheet |
| CN111804729A (en) * | 2020-07-06 | 2020-10-23 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for producing medium and extra-thick plates through steel plate blanks under high-performance prepressing |
| CN114669606A (en) * | 2020-12-24 | 2022-06-28 | 宝山钢铁股份有限公司 | Internally cooled steel plate interruption prevention control method and rolling line |
| CN114669606B (en) * | 2020-12-24 | 2024-03-08 | 宝山钢铁股份有限公司 | Method for preventing interruption of intermediate cooling steel plate and rolling line |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2735258B2 (en) | 1998-04-02 |
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