JPH04105701A - Method and equipment for continuous hot rolling of thin sheet - Google Patents

Method and equipment for continuous hot rolling of thin sheet

Info

Publication number
JPH04105701A
JPH04105701A JP22481790A JP22481790A JPH04105701A JP H04105701 A JPH04105701 A JP H04105701A JP 22481790 A JP22481790 A JP 22481790A JP 22481790 A JP22481790 A JP 22481790A JP H04105701 A JPH04105701 A JP H04105701A
Authority
JP
Japan
Prior art keywords
rolling
thin plate
rolled
continuous hot
slab
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.)
Pending
Application number
JP22481790A
Other languages
Japanese (ja)
Inventor
Tomoaki Kimura
智明 木村
Teruo Sekiya
関谷 輝男
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP22481790A priority Critical patent/JPH04105701A/en
Publication of JPH04105701A publication Critical patent/JPH04105701A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/46Metal-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
    • B21B1/466Metal-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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/22Metal-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
    • B21B1/24Metal-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
    • B21B1/26Metal-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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B15/00Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0085Joining ends of material to continuous strip, bar or sheet
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/02Metal-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
    • B21B1/024Forging or pressing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B15/00Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007Cutting or shearing the product

Abstract

PURPOSE:To perform continuous rolling with a smaller number of rough rolling mills by selecting whether joining is conducted in the state of a slab before rough rolling or in the state of a bar material after rough rolling in accordance with the kind of steel of rolled stock and then rolling the material. CONSTITUTION:Since joining machines 4, 8 are mounted on the respective inlet sides of a group 5 of rough rolling mills and a group 10 of finish rolling mills, joining can be conducted in the state of a bar material after the rough rolling and joining is conducted in the state of a slab before the rough rolling in case of special steel centering SUS. Consequently, the rough rolling can be conducted by using one rolling mill R1 reversibly, special steel can be rolled by three common rolling mills R1-R3 and the finish rolling can be conducted continuously. In other words, continuous rolling can be conducted by less number of mills in the rough rolling.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は連続熱間薄板圧延方法及び設備に係わり、特に
、圧延材を順次接合して連続的に熱間圧延を行ない、薄
板製品を製造する圧延方法及び設備に関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method and equipment for continuous hot rolling of thin sheets, and in particular, to manufacturing thin sheet products by sequentially joining rolled materials and continuously hot rolling them. The present invention relates to a rolling method and equipment for rolling.

〔従来の技術〕[Conventional technology]

熱間圧延では板厚が薄くなると、薄板の先後端の曲りか
大きくなったり、絞り込む事故が生じ易くなる。これを
防止するには圧延材をエンドレスにして連続的に圧延す
ることが望まれる。圧延材を連続的に熱間圧延するため
には、圧延材を順次接合する必要がある。圧延材の接合
法としては、粗圧延前のスラブの状態で接合する方法が
特開昭57−106403号公報に、粗圧延後のバー材
の状態で接合する方法が特開昭58−112601号公
報に開示されている。前者では、接合したスラブの連続
的な粗圧延を可能にするため、粗圧延機として2台のプ
ラネタリミルを配置している。
In hot rolling, when the sheet thickness becomes thinner, the leading and trailing edges of the thin sheet become more curved, and accidents at narrowing become more likely to occur. To prevent this, it is desirable to roll the rolled material endlessly and continuously. In order to continuously hot-roll rolled materials, it is necessary to sequentially join the rolled materials. Regarding joining methods of rolled materials, a method of joining in the state of slabs before rough rolling is disclosed in JP-A-57-106403, and a method of joining in the state of bar materials after rough-rolling is described in JP-A-58-112601. Disclosed in the official gazette. In the former, two planetary mills are arranged as rough rolling mills to enable continuous rough rolling of the joined slabs.

後者では、粗圧延したバー材をコイルに巻取った後、巻
戻し、先行圧延材と接合する方法がとられる。
In the latter method, a roughly rolled bar material is wound into a coil, then unwound and joined to the previously rolled material.

一方、1つの熱間圧延ラインで普通鋼とステンレス等の
特殊鋼の両方を処理することは設備の経済性の観点から
好ましく、例えば特開昭57−149007号公報及び
特開昭57−149008号公報では、ローラガイド式
連続鋳造設備と回転ベルト式連続鋳造設備とを同一熱間
圧延ラインに並設し、特殊鋼はローラガイド式連続鋳造
設備で、普通鋼は回転ベルト式連続鋳造設備で製造し、
それぞれ下流の圧延ラインに供給するようにしている。
On the other hand, it is preferable to process both ordinary steel and special steel such as stainless steel in one hot rolling line from the economical point of view of the equipment. The publication states that roller guide type continuous casting equipment and rotating belt type continuous casting equipment are installed side by side on the same hot rolling line, and special steel is manufactured using the roller guide type continuous casting equipment and ordinary steel is manufactured using the rotating belt type continuous casting equipment. death,
Each is supplied to a downstream rolling line.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

圧延材の接合による連続薄板熱間圧延は、特開昭57−
106403号公報に示されるように、粗圧延前のスラ
ブの状態で圧延材を順次接合して行う方法が、粗圧延機
及び仕上げ圧延機の全ての圧延機に対して圧延材を連続
して送れるという点で、最も理想的なやり方である。し
かし、粗圧延は低速で、しかも板厚250W前後から3
0mm程度までの大きな量の圧延を行なわねばならない
Continuous hot rolling of thin sheets by joining rolled materials is described in Japanese Patent Application Laid-Open No. 57-
As shown in Publication No. 106403, the method of sequentially joining the rolled material in the state of the slab before rough rolling allows the rolled material to be continuously sent to all the rolling mills, including the rough rolling mill and the finishing rolling mill. In that sense, this is the most ideal method. However, rough rolling is done at a low speed, and from a plate thickness of around 250W,
A large amount of rolling, down to about 0 mm, must be carried out.

この圧延は圧延材が普通鋼の場合は比較的容易に行える
が、圧延材がステンレス鋼を中心とした特殊鋼である場
合、変形抵抗及び焼付は性が大きいため普通の粗圧延機
での圧延は困難である。このため、特開昭57−106
403号公報に記載のように、粗圧延機として、大きい
圧下量の圧延が可能な特殊で複雑な圧延機、即ち、2台
のプラネタリミルを配置しなければならないという問題
がある。
This rolling can be done relatively easily when the material to be rolled is ordinary steel, but when the material to be rolled is special steel, mainly stainless steel, the deformation resistance and seizure are large, so rolling with an ordinary roughing mill is not possible. It is difficult. For this reason, JP-A-57-106
As described in Japanese Patent No. 403, there is a problem in that a special and complicated rolling mill capable of rolling with a large reduction amount, that is, two planetary mills, must be installed as a rough rolling mill.

一方、粗圧延後のバー材の状態で接合する方法は、特開
昭58〜112601号公報に記載のように、粗圧延は
従来と同様に通常の粗圧延機で圧延を行なうので上述の
問題は生じない。しかし、スラブ材の圧延では一般的に
スラブ先後端にフィシュテールやタング状の不良部が生
じるが、特開昭58−112601号公報では、鋼種に
応じて圧延材の接合位置を変える点の配慮がされておら
ず、圧延材が普通鋼の場合も粗圧延後のバー材の状態で
の接合となるので、粗圧延は従来通りのスラブ材の圧延
となって上述の不良部が生じ、歩留低下を生じるという
問題がある。また、普通鋼ではスケールが発生しやすい
ので、粗圧延後のバー材をコイルに巻き取ると表面に発
生したスケールが巻取り、巻戻し作業中に母材に食い込
み、圧延後の製品の表面品質を悪化させるという問題が
ある。
On the other hand, the method of joining the bar materials after rough rolling, as described in JP-A No. 58-112601, involves the above-mentioned problems because the rough rolling is carried out in a normal rough rolling mill as in the past. does not occur. However, when rolling slab materials, fishtail or tongue-shaped defects generally occur at the front and rear ends of the slab, but in JP-A-58-112601, consideration is given to changing the joining position of the rolled materials depending on the steel type. Even if the rolled material is ordinary steel, it will be joined in the state of the bar material after rough rolling, so the rough rolling will be the conventional rolling of slab material, resulting in the above-mentioned defective parts and slow progress. There is a problem in that it causes a drop in retention. In addition, scale is easily generated in ordinary steel, so when the bar material after rough rolling is wound into a coil, the scale generated on the surface is wound and eaten into the base material during the unwinding operation, resulting in poor surface quality of the rolled product. The problem is that it worsens the

更に、特開昭57−149007号公報及び特開昭57
−149008号公報では、連続鋳造設備は普通鋼と特
殊鋼のいずれかに適した方式を選択し、製造したスラブ
を下流の圧延ラインに供給するようにしているが、圧延
ラインにおいて圧延材を順次接合することは行っておら
ず、連続的に熱間圧延を行うことはできないという問題
がある。
Furthermore, JP-A-57-149007 and JP-A-57
- In Publication No. 149008, continuous casting equipment is designed to select a method suitable for either ordinary steel or special steel, and supply the manufactured slabs to the downstream rolling line. There is a problem that no bonding is performed and continuous hot rolling cannot be performed.

本発明の目的は、鋼種に応じて圧延材の接合位置を変え
ることにより、特殊で複雑な圧延機を必要とせず、粗圧
延における歩留まり低下を最少限にとどめ、かつ各種鋼
種に対して良質な薄板製品を製造できる連続熱間薄板圧
延方法及び設備を提供することである。
The purpose of the present invention is to minimize the decrease in yield during rough rolling by changing the joining position of rolled materials depending on the steel type, without requiring a special and complicated rolling mill, and to achieve high quality for various steel types. An object of the present invention is to provide a continuous hot thin plate rolling method and equipment capable of manufacturing thin plate products.

〔課題を解決するための手段〕[Means to solve the problem]

上記目的を達成するため、本発明は、圧延材を順次接合
して連続的に熱間圧延を行い、薄板製品を製造する連続
熱間薄板圧延方法において、圧延材の鋼種に応じて、粗
圧延前のスラブの状態あるいは粗圧延後のバー材の状態
のいずれで圧延材の接合を行うかを選択し、その選択に
応じて圧延材を接合し、連続的に熱間圧延を行うもので
ある。
In order to achieve the above object, the present invention provides a continuous hot thin plate rolling method for manufacturing thin plate products by sequentially joining rolled materials and continuously hot rolling the rough rolling according to the steel type of the rolled material. Select whether to join the rolled materials in the state of the previous slab or the state of the bar material after rough rolling, join the rolled materials according to the selection, and perform hot rolling continuously. .

例えば、前記圧延材が普通鋼のときはスラブの状態で接
合を行い、ステンレス鋼を中心とした特殊鋼のときはバ
ー材の状態で接合を行う。
For example, when the rolled material is ordinary steel, it is joined in the form of a slab, and when it is made of special steel, mainly stainless steel, it is joined in the state of a bar material.

ここで、好ましくは、バー材の状態で圧延材の接合を行
うときは、粗圧延後のバー材を−Hコイルに巻取り、そ
の後これを巻戻して前記接合を行つ0 また好ましくは、バー材の状態で圧延材の接合を行うと
きのスラブの粗圧延は、少なくとも1台の圧延機で可逆
圧延を行う工程を含む。
Here, preferably, when joining the rolled materials in the state of a bar material, the roughly rolled bar material is wound into a -H coil, and then this is unwound to perform the joining. Rough rolling of the slab when joining the rolled material in the state of a bar material includes a step of performing reversible rolling with at least one rolling mill.

更に好ましくは、前記圧延材の接合は、先行圧延材の後
端と後続圧延材の先端を隙間を設けた突き合わせ、この
状態で両者の突き合わせ面を切断ガスで溶剤した後、当
該溶剤部を圧着することにより行う。
More preferably, the joining of the rolled materials is performed by butting the rear end of the preceding rolled material and the leading end of the subsequent rolling material with a gap, applying a solvent to the abutting surfaces of the two in this state with cutting gas, and then crimping the solvent part. Do by doing.

また好ましくは、前記スラブを連続鋳造ラインにて製造
し、その製造過程でスラブの先後端を凹ます予成形を施
す。
Preferably, the slab is manufactured on a continuous casting line, and preforming is performed to concave the front and rear ends of the slab during the manufacturing process.

また、上記目的を達成するため、本発明は、圧延材を順
次接合して連続的に熱間圧延を行い、薄板製品を製造す
る連続熱間薄板圧延設備において、粗圧延設備及び仕上
げ圧延設備と、粗圧延設備の入側及び仕上げ圧延設備の
入側のそれぞれに配置された圧延材の接合装置とを備え
るものである。
In addition, in order to achieve the above object, the present invention provides a continuous hot sheet rolling facility for manufacturing thin sheet products by sequentially joining rolled materials and continuously hot rolling them, with a rough rolling facility and a finishing rolling facility. , and a rolling material joining device disposed on the entry side of the rough rolling equipment and on the entry side of the finish rolling equipment, respectively.

好ましくは、前記粗圧延設備の出側に粗圧延後のバー材
をコイルに巻取りかつこれを巻戻すコイル巻取り巻戻し
装置が設置される。
Preferably, a coil winding and unwinding device for winding and unwinding the roughly rolled bar material into a coil is installed on the outlet side of the rough rolling equipment.

また好ましくは、前記粗圧延設備は複数台の粗圧延機を
含み、その内の少なくとも1台を可逆圧延可能な圧延機
とする。
Preferably, the rough rolling equipment includes a plurality of rough rolling mills, at least one of which is a rolling mill capable of reversible rolling.

〔作用〕[Effect]

本発明は、圧延材の鋼種に応じて、粗圧延前のスラブの
状態あるいは粗圧延後のバー材の状態のいずれで圧延材
の接合を行うかを選択する。例えば、圧延材が普通鋼の
ときはスラブの状態で接合し、ステンレス鋼を中心とし
た特殊鋼のときはバー材の状態で接合する。
In the present invention, depending on the steel type of the rolled materials, it is selected whether to join the rolled materials in the slab state before rough rolling or in the bar material state after rough rolling. For example, when the rolled material is ordinary steel, it is joined in the form of a slab, and when it is made of special steel, mainly stainless steel, it is joined in the state of bar material.

普通鋼とステンレス鋼間には第7図の表に示すような物
性値の差がある。即ち、ステンレス鋼(SUSと略す)
は普通鋼に比較し、変形抵抗が大で、ロールとの燻材は
性が大の欠点があるが、スケールは発生し難い特徴があ
る。
There are differences in physical properties between ordinary steel and stainless steel, as shown in the table in Figure 7. That is, stainless steel (abbreviated as SUS)
Compared to ordinary steel, steel has the disadvantages of greater resistance to deformation, and greater resistance to smoked wood with rolls, but it has the characteristic that scale does not easily form.

SUSの変形抵抗は普通鋼に比較して約1.5倍程度大
である。また、SUS材では5US304と呼ばれるN
iを含むSUSが多いが、このような材料を高圧下する
と、SUS材のNi成分による圧延ロールとの焼付きが
生じる。このため、普通鋼の粗圧延では、例えばスラブ
厚220mmから第1パス目にスリップ限界に近い12
0謳程度圧下してもロールとの焼付きは生じないが、S
US材は40mm程度の圧下量に制限される。結局、板
厚220胚のスラブから板厚30mm前後のバー材まで
の粗圧延に、普通鋼は3パス程度で良いが、SUS材は
5パス程度必要である(第6図参照)。
The deformation resistance of SUS is approximately 1.5 times greater than that of ordinary steel. In addition, in SUS material, N is called 5US304.
Many SUS materials contain i, but when such materials are subjected to high pressure reduction, the Ni component of the SUS material causes seizure with the rolling rolls. For this reason, in rough rolling of ordinary steel, for example, from a slab thickness of 220 mm, in the first pass, 12 mm is close to the slip limit.
Seizure with the roll does not occur even if the pressure is reduced to about 0.
For US materials, the reduction amount is limited to about 40 mm. In the end, for rough rolling from a slab with a thickness of 220mm to a bar material with a thickness of around 30mm, about 3 passes are sufficient for ordinary steel, but about 5 passes are required for SUS material (see Figure 6).

このため、SUS材をスラブの状態で接合すると、上記
の例では粗圧延には5台の圧延機が必要となり、経済的
に不利である。即ち、一般にSUS材の生産量は普通鋼
に対し5〜10%であり、このように少ない圧延材の粗
圧延のために多数の圧延機を配置するのは経済的でない
Therefore, if the SUS materials are joined in the form of slabs, five rolling mills are required for rough rolling in the above example, which is economically disadvantageous. That is, the production amount of SUS material is generally 5 to 10% of that of ordinary steel, and it is not economical to arrange a large number of rolling mills for rough rolling of such a small number of rolled materials.

本発明では、ステンレス鋼を中心とした特殊鋼のときは
バー材の状態で接合するので、粗圧延は従来通りのスラ
ブの状態で行え、粗圧延は少なくとも1台の圧延機で可
逆圧延を行うことが可能である。このため、粗圧延機の
台数を普通鋼の圧延に必要な台数としても、特殊な圧延
機を用いることなく粗圧延が行え、かつその後の仕上げ
圧延を連続的に行える。即ち、粗圧延機の台数を減少し
た連続圧延が可能である。
In the present invention, since special steels such as stainless steel are joined in the form of bar materials, rough rolling can be performed in the conventional slab state, and rough rolling is performed by reversible rolling using at least one rolling mill. Is possible. Therefore, even if the number of rough rolling mills is the same as that required for rolling ordinary steel, rough rolling can be performed without using a special rolling mill, and subsequent finish rolling can be performed continuously. That is, continuous rolling is possible with a reduced number of rough rolling mills.

また、バー材の接合において、接合には30秒程度の時
間が必要なので、その間にバー材が冷える問題がある。
Further, in joining the bar materials, since joining requires about 30 seconds, there is a problem that the bar materials cool down during that time.

しかし、SUS材はスケールが生じ難いので、保温のた
めコイルに巻取り、その先端を巻戻して先行するバー材
の尾端と接合することができ、これにより熱の放散を防
止しながらのバー材の接合が可能である。即ち、SUS
材はバー材の接合を温度低下を少なくしてかつ表面品質
を悪化させずに実施することができる。また、コイルに
一旦巻き取ることにより、粗圧延と仕上げ圧延間の距離
を減少した連続圧延が可能となる。
However, since SUS material does not easily form scale, it is possible to wind it into a coil for heat retention, and then unwind the tip and join it to the tail end of the preceding bar material. It is possible to join materials. That is, SUS
The material allows joining of bar materials with less temperature drop and without deteriorating surface quality. In addition, by once winding it into a coil, continuous rolling with a reduced distance between rough rolling and finishing rolling becomes possible.

これに対し、普通鋼は1回の圧延量を大きくとれるので
、圧延機台数を減少してもスラブの状態で接合を行った
連続的な粗圧延か可能である。また、このような連続的
な粗圧延を行うことにより、従来のスラブの圧延で見ら
れたスラブ先後端でのフィシュテールやタング状の不良
部の発生が防止され、粗圧延における歩留まり低下を最
少限にとどめることができる。
On the other hand, ordinary steel can be rolled in a large amount at one time, so even if the number of rolling mills is reduced, it is possible to perform continuous rough rolling with joining in the form of slabs. In addition, by performing such continuous rough rolling, the occurrence of fishtails and tongue-shaped defects at the front and rear ends of the slab, which are seen in conventional slab rolling, is prevented, and the yield loss during rough rolling is minimized. can be kept to a limit.

また、普通鋼はSUS材に比ベスケールが発生し易い欠
点があるので、バー材のコイル巻取りによる保熱はスケ
ールの母材への食い込みの面から好ましくない。本発明
では、普通鋼は粗圧延でバー材に圧延した後、連続的に
仕上げ圧延されるので、スケールの発生を最少限にし、
表面品質の良好な薄板製品が得られる。
Further, since ordinary steel has the disadvantage that scale is more likely to occur than SUS material, heat retention by winding the bar material into a coil is not preferable in terms of scale digging into the base material. In the present invention, ordinary steel is rough-rolled into bar material and then continuously finish-rolled, so that the occurrence of scale is minimized.
A thin plate product with good surface quality can be obtained.

〔実施例〕〔Example〕

以下、本発明の一実施例を第1図〜第6図により説明す
る。
An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

第1図において、本実施例の連続熱間薄板圧延圧延設備
は、連続鋳造機1、鋳片プレス及び切断装置2、均熱炉
3、第1の接合装置、即ち、スラブ接合機4、粗圧延機
群5、コイル巻取り巻戻し装置6、第1の剪断機7、第
2の接合装置、即ち、バー材接合機8、第1のルーパ装
置9、仕上げ圧延機群10、冷却装置11、第2のルー
パ装置12、第2の剪断機13、巻取り機14.15と
からなっている。
In FIG. 1, the continuous hot thin plate rolling equipment of this embodiment includes a continuous casting machine 1, a slab press and cutting device 2, a soaking furnace 3, a first joining device, that is, a slab joining machine 4, a rough Rolling mill group 5, coil winding and unwinding device 6, first shearing machine 7, second joining device, that is, bar material joining machine 8, first looper device 9, finishing rolling mill group 10, cooling device 11 , a second looper device 12, a second shearer 13, and a winder 14.15.

連続鋳造機1では、タンデイツシュ11からの注湯をノ
ズル12により鋳型13に注湯し、連続的に冷却、造形
することにより連続鋳片14が得られる。この連続鋳片
14はプレス及び切断装置2で、スラブ状態での接合を
容易にするため(圧延材が普通鋼の場合)、あるいは粗
圧延での噛込みを良くするため(圧延材が特殊鋼、例え
ばステンレス鋼の場合)にスラブ材端部に凹みを形成す
るため、凹部を成形してスラブ15に切断される。
In the continuous casting machine 1, the continuous slab 14 is obtained by pouring the molten metal from the tundish 11 into the mold 13 through the nozzle 12, and continuously cooling and shaping the molten metal. This continuous slab 14 is used in a press and cutting device 2 to facilitate joining in the slab state (if the rolled material is made of ordinary steel) or to improve engagement during rough rolling (if the rolled material is made of special steel). In order to form a recess at the end of the slab material (for example, in the case of stainless steel), the recess is formed and the slab 15 is cut.

プレス及び切断装置2の詳細を第2図に示す。Details of the press and cutting device 2 are shown in FIG.

第2図において、プレス作業はプレス装置16でプレス
工具17をシリンダ18により鋳片14の両側より押厚
することにより行う。このとき、鋳片14の移動と同調
してプレス作業が行えるようにするため、プレス装置1
6はシリンダ19により鋳片速度に同期して移動させる
。このようにして凹部20を形成した後、第2図の凹部
20の点線21で示す中心部をガス切断機22の酸素バ
ーナ23で切断する。この切断も切断機22をシリンダ
24で鋳片速度に同期して移動させて行なう。切断され
た鋳片は圧延のためのスラブ15になる。このようにし
て製造されたスラブ15の先後端には予成形された凹み
25が形成される。この予成形量は鋳片厚みが220m
mの場合、120薗程度とするのが次の粗圧延に有利で
ある。
In FIG. 2, the pressing operation is performed by pressing a press tool 17 with a cylinder 18 from both sides of the slab 14 using a press device 16. At this time, in order to perform pressing work in synchronization with the movement of the slab 14, the press device
6 is moved by a cylinder 19 in synchronization with the slab speed. After forming the recess 20 in this manner, the center portion of the recess 20 shown by the dotted line 21 in FIG. 2 is cut with the oxygen burner 23 of the gas cutting machine 22. This cutting is also performed by moving the cutting machine 22 using the cylinder 24 in synchronization with the slab speed. The cut slab becomes a slab 15 for rolling. Preformed recesses 25 are formed at the front and rear ends of the slab 15 manufactured in this manner. This preforming amount is 220m thick
In the case of m, it is advantageous for the next rough rolling to be approximately 120 mm.

このスラブ1−5は均熱炉3に送られ、均熱されたスラ
ブは、普通鋼の場合は、スラブ接合機4で先行するスラ
ブの後端と後続するスラブの先端が接合される。接合機
4の詳細を第3図及び第4図に示す。
This slab 1-5 is sent to a soaking furnace 3, and in the case of common steel, the soaked slab is joined by a slab joining machine 4 at the rear end of the preceding slab and the tip of the succeeding slab. Details of the joining machine 4 are shown in FIGS. 3 and 4.

第3図において、接合機4のフレーム30内で先行する
スラブ31と後続するスラブ32が隙間gを設けて突き
合せられる。この隙間gはスラブの厚みによるが、5〜
15mm程度に設定される。
In FIG. 3, a preceding slab 31 and a succeeding slab 32 are butted together with a gap g provided within a frame 30 of a joining machine 4. This gap g depends on the thickness of the slab, but is between 5 and
It is set to about 15 mm.

この設定は上下ローラ34a、35b及び34b。This setting is for the upper and lower rollers 34a, 35b, and 34b.

35bを有する2段のピンチローラにより行われる。即
ち、前段のピンチローラ34b、35bを駆動して先行
するスラブ31の位置を設定し、この先行するスラブ3
1に対して、後段のピンチローラ34a、35aを駆動
して後続するスラブ32を送り込み、隙間gの設定を行
う。このピンチローラの上ローラ34a、34bはアー
ム35をアクチエータ36により上下することにより昇
降される。
This is done using two stages of pinch rollers having 35b. That is, the position of the preceding slab 31 is set by driving the preceding pinch rollers 34b and 35b, and the position of the preceding slab 31 is set.
1, the succeeding slab 32 is sent in by driving the pinch rollers 34a and 35a at the latter stage, and the gap g is set. The upper rollers 34a and 34b of the pinch roller are raised and lowered by moving the arm 35 up and down by an actuator 36.

このように隙間gを設定された2つのスラブ31.32
は次のようにして接合される。まず、溶剤バーナ37よ
り、隙間gより大きな噴出径dの切断ガス噴流を噴出し
、雨音の突き合わせ面を溶剤する。この溶剤により突き
合わせ面は清浄かつ高温になる。次いで、この状態でピ
ンチローラ34a、35aを駆動してスラブ32をスラ
ブ31に押圧して溶剤部を圧着し、接合を完了する。な
お、このとき、スラブ端部には前述したように凹み25
が形成されているので、接合面積が小さくなり、短時間
で良好な接合が可能になる。
Two slabs 31.32 with gap g set in this way
are joined as follows. First, a cutting gas jet having a diameter d larger than the gap g is ejected from the solvent burner 37 to solvent the abutting surfaces of the rain sounds. This solvent makes the abutting surfaces clean and hot. Next, in this state, the pinch rollers 34a and 35a are driven to press the slab 32 against the slab 31 to press the solvent portion and complete the joining. In addition, at this time, the recess 25 is formed at the end of the slab as described above.
is formed, the bonding area becomes small and good bonding can be achieved in a short time.

上記の接合中、接合機4はシリンダ38により先行する
スラブ31の速度に同期してレール39上を駆動させら
れる。
During the above joining, the joining machine 4 is driven by the cylinder 38 on the rail 39 in synchronization with the speed of the preceding slab 31.

溶剤バーナ部の詳細を第4図に示す。溶剤バーナ37に
はホース40より酸素が、ホース41からは予熱ガスか
送られる。また、必要に応じてホース42よりFeパウ
ダか供給される。ホース40.41はそれぞれ酸素ポン
ベ43及び予熱ガスボンベ44に接続されている。ホー
ス42はFeパウダボンベ45に接続され、ボンベ45
は加圧ガスポンベ46に接続されている。
Figure 4 shows details of the solvent burner section. Oxygen is sent to the solvent burner 37 from a hose 40, and preheated gas is sent from a hose 41. Further, Fe powder is supplied from the hose 42 as needed. Hoses 40, 41 are connected to an oxygen pump 43 and a preheating gas cylinder 44, respectively. The hose 42 is connected to the Fe powder cylinder 45, and the cylinder 45
is connected to a pressurized gas pump 46.

バーナ37は、第4図に示すように、スラブの幅方向に
多数配置し、これらをスラブの突き合わせ面に沿って横
行させるのが好ましい。この目的のためモータ47が設
けられ、モータ47を駆動することによりクランク48
を回し、コネクチングロッド49を出し入れする。クラ
ンク48は軸受50により支持されている。一方、多数
のバーナ37はビーム51に取り付けられ、ビーム51
は押引きバー52に結合され、押引きバー52がコネク
チングロッド49に連結されている。また、押引きバー
52は、第3図に示すようにガイドバー53に接合され
、このガイドバー53がフレーム30上を案内される。
As shown in FIG. 4, it is preferable that a large number of burners 37 be arranged in the width direction of the slab, and that these burners be arranged laterally along the abutting surfaces of the slabs. A motor 47 is provided for this purpose, and by driving the motor 47 a crank 48
Turn the connecting rod 49 in and out. The crank 48 is supported by a bearing 50. On the other hand, a large number of burners 37 are attached to the beam 51.
is coupled to a push/pull bar 52, which in turn is connected to the connecting rod 49. Further, the push/pull bar 52 is joined to a guide bar 53 as shown in FIG. 3, and this guide bar 53 is guided on the frame 30.

第1図に戻り、接合機4て接合されたスラブ31は粗圧
延機群5により圧延され、バー材60か製造される。粗
圧延機群5は3台の粗圧延機R1゜R2,R3からなっ
ている。圧延材が普通鋼の場合は、引き続き、コイル巻
取り巻戻し装置6及び第2の接合装置8を通過し、ルー
パ装置9を経由して仕上げ圧延機群10に送り込まれる
。仕上げ圧延機群10は3台の4段圧延機Fl、F2.
F3及び3台の6段圧延機F4.F5.F6をタンデム
に配置してなっている。
Returning to FIG. 1, the slab 31 joined by the joining machine 4 is rolled by the rough rolling mill group 5 to produce a bar material 60. The rough rolling mill group 5 consists of three rough rolling mills R1, R2, and R3. If the rolled material is ordinary steel, it subsequently passes through a coil winding and unwinding device 6 and a second joining device 8, and is sent to a finishing mill group 10 via a looper device 9. The finishing rolling mill group 10 includes three four-high rolling mills Fl, F2.
F3 and three 6-high rolling mills F4. F5. F6 is arranged in tandem.

仕上げ圧延機群10で圧延された薄板61は冷却装置1
1により所定の温度に冷却した後、ルーパ装置12を経
由して巻取機14に巻き取り、コイル62が製造される
。コイル62の径が所定量に達すると、剪断機13によ
り薄板61が切断され、後続する薄板は巻取機15に巻
取られる。このとき、薄板61の切断及び巻取機の変更
は、薄板の速度を少し低下させて行うのが好ましく、こ
の場合、仕上げ圧延機群10の圧延速度との差を吸収す
るため、ルーパ装置12において、ピンチローラ63の
速度を調節してルーパ64を放出するように作業が行わ
れる。
The thin plate 61 rolled by the finish rolling mill group 10 is cooled by the cooling device 1.
1 to a predetermined temperature, the coil 62 is wound up by the winder 14 via the looper device 12, and the coil 62 is manufactured. When the diameter of the coil 62 reaches a predetermined value, the thin plate 61 is cut by the shearing machine 13, and the subsequent thin plate is wound up by the winding machine 15. At this time, it is preferable to cut the thin plate 61 and change the winding machine by slightly lowering the speed of the thin plate. In this case, in order to absorb the difference in rolling speed from the finishing rolling mill group 10, At this point, the speed of the pinch roller 63 is adjusted to release the looper 64.

以上は普通鋼の場合であるが、圧延材がステンレス鋼、
即ち、SUSを中心とした特殊鋼の場合は、スラブ材は
スラブ圧延機4で接合されることなく第5図に示すよう
に熱間圧延が行われる。
The above is for ordinary steel, but if the rolled material is stainless steel,
That is, in the case of special steel, mainly SUS, the slab material is hot rolled as shown in FIG. 5 without being joined by the slab rolling mill 4.

即ち、均熱炉3で均熱されたスラブ70はスラブ接合機
4を通過し、直接粗圧延設備5に送り込まれる。このと
き、スラブ端部には前述したように凹み25が形成され
ているので、噛込み性が改善される。粗圧延設備5では
、第1段の粗圧延機R1で所定パス、例えば3パスの可
逆圧延を行い、次いで粗圧延機R2,R3で圧延を行い
、バー材71を製造する。このバー材71はコイル巻取
り巻戻し装置6でコイル72に巻取る。巻取られたコイ
ル72は巻戻し側に送られて巻戻しコイル73となり、
巻戻される。
That is, the slab 70 soaked in the soaking furnace 3 passes through the slab joining machine 4 and is directly sent to the rough rolling equipment 5. At this time, since the recess 25 is formed at the end of the slab as described above, the biting property is improved. In the rough rolling equipment 5, the first stage rough rolling mill R1 performs reversible rolling for a predetermined pass, for example, three passes, and then the rough rolling mills R2 and R3 perform rolling to produce the bar material 71. This bar material 71 is wound into a coil 72 by a coil winding and unwinding device 6. The wound coil 72 is sent to the unwinding side and becomes an unwinding coil 73,
It is rewound.

コイル巻取り巻戻し装置6てのコイル72の巻取りは、
バー材71を3本ベンゾングローラフ4で上方に曲げ、
クレードルローラ75上に巻取ることにより行う。クレ
ードルローラ75はシリンダ76により上下方向の位置
調整が可能である。
Winding of the coil 72 by the coil winding and unwinding device 6 is as follows:
Bend the three bar materials 71 upward with the benzone glow rough 4,
This is done by winding it up on a cradle roller 75. The position of the cradle roller 75 can be adjusted in the vertical direction by a cylinder 76.

同様に巻戻し側のコイル73もシリンダ76で昇降する
クレードルローラ77で巻戻される。
Similarly, the coil 73 on the unwinding side is also rewound by a cradle roller 77 that is raised and lowered by a cylinder 76.

コイル73を巻戻して得たバー材78の先端79は剪断
機7で切断され、先行するバー材80の剪断機7で切断
された後端81とバー材接合機8で接合される。バー材
接合機8は前述のスラブ接合機4と同様の構成を有し、
シリンダ38によりバー材83と同調移動させながら接
合を行う。なお、この場合、圧延材の先後端に凹みはな
い。
The tip end 79 of the bar material 78 obtained by unwinding the coil 73 is cut by the shearing machine 7, and is joined to the rear end 81 of the preceding bar material 80, which was cut by the shearing machine 7, by the bar material joining machine 8. The bar material joining machine 8 has the same configuration as the above-mentioned slab joining machine 4,
Joining is performed while moving in synchronization with the bar material 83 by the cylinder 38. In this case, there are no depressions at the front and rear ends of the rolled material.

接合されたバー材はルーパ装置9を経て仕上げ圧延機群
10で圧延される。このとき、仕上げ圧延機群10での
圧延速度に対し接合機8の移動速度は遅いので、その速
度差はルーパ装置9でピンチローラ82を調整してルー
プ83を放出して吸収し、作業が行われる。
The joined bar material passes through a looper device 9 and is rolled by a finishing mill group 10. At this time, since the moving speed of the welding machine 8 is slower than the rolling speed of the finishing rolling mill group 10, the speed difference is absorbed by adjusting the pinch roller 82 with the looper device 9 and releasing the loop 83, thereby making the work easier. It will be done.

仕上げ圧延機群10で圧延された後の処理は上述した普
通鋼の場合と同じである。
The treatment after rolling in the finish rolling mill group 10 is the same as that for ordinary steel described above.

なお、接合機4,8において、これらが使用されていな
いときは第3図及び第4図に示す上部ピンチローラ34
a、34bは上方に移動してオープンし、下部ピンチロ
ーラ35a、35bはスラブ又はバー材の通板するテー
ブルローラとして機能する。コイル巻取り巻戻し装置6
も同様に、使用されていないとき、即ち、普通鋼を圧延
する第1図に示す状態では、バー材60を通板するテー
ブルローラとして機能するように水平に支持される。
In addition, in the bonding machines 4 and 8, when these are not used, the upper pinch roller 34 shown in FIGS. 3 and 4
a, 34b move upward and open, and lower pinch rollers 35a, 35b function as table rollers for passing slabs or bar materials. Coil winding and unwinding device 6
Similarly, when not in use, that is, in the state shown in FIG. 1 in which ordinary steel is rolled, the bar material 60 is supported horizontally so as to function as a table roller for passing the bar material 60 through it.

以上の説明した本実施例の配置による普通鋼とSUS材
の代表的圧延スケジュールを第6図に示す。この例では
、普通鋼の場合、粗圧延前のスラブを接合機4で接合し
、板厚220Mのスラブから板厚30mm前後のバー材
までの粗圧延をR1−R3の3パスで行う。特に、スラ
ブ厚220mmから第1パス目にスリップ限界に近い1
20−程度圧下する。これに対し、SUSの場合、粗圧
延はスラブの接合を行わず、圧延機R1で3パスの可逆
圧延を行い、圧延機R2,R3で2パスの圧延を行い、
合計5パスで板厚220mmのスラブから板厚30w前
後のバー材までの粗圧延を行っている。特に、各パスで
の圧下量は40−以下に制限している。これは、前述し
たように、SUSは普通鋼に比べ変形抵抗及びロールへ
の焼付は性が大きいからである。SUSの場合、粗圧延
後バー材を接合して、仕上げ圧延を連続的に行う。
FIG. 6 shows a typical rolling schedule for ordinary steel and SUS material according to the arrangement of this embodiment described above. In this example, in the case of ordinary steel, the slabs before rough rolling are joined by the joining machine 4, and rough rolling is performed from a slab with a thickness of 220 mm to a bar material with a thickness of about 30 mm in three passes R1 to R3. In particular, from a slab thickness of 220 mm, the slip limit is close to 1 on the first pass.
Reduce the pressure by about 20 degrees. On the other hand, in the case of SUS, the rough rolling does not involve joining the slabs, but performs 3 passes of reversible rolling in rolling mill R1, and 2 passes of rolling in rolling mills R2 and R3.
Rough rolling is performed from a slab with a thickness of 220 mm to a bar material with a thickness of about 30 W in a total of 5 passes. In particular, the amount of reduction in each pass is limited to 40- or less. This is because, as mentioned above, SUS has greater deformation resistance and seizure resistance than ordinary steel. In the case of SUS, after rough rolling, the bar material is joined and finish rolling is performed continuously.

以上のような接合連続圧延により、普通鋼では板厚1.
6■、SUS材では2.0mのような薄板が製造される
Through the above-described joint continuous rolling, ordinary steel can be rolled to a thickness of 1.
6) Thin plates of 2.0 m are manufactured using SUS material.

以上のように、本実施例によれば、粗圧延機群5と仕上
げ圧延機群10のそれぞれの入側に接合機4,8を設置
したので、SUSを中心とした特殊鋼の場合は粗圧延後
のバー材の状態で接合することができ、粗圧延は従来逆
りのスラブの状態で行える。このため、粗圧延は1台の
圧延機R1を可逆式にして行うことができ、普通鋼の粗
圧延に必要な普通の3台の圧延機R1〜R3で特殊鋼の
圧延もでき、しかも仕上げ圧延は連続的に行える。
As described above, according to this embodiment, since the welding machines 4 and 8 are installed on the entry side of each of the rough rolling mill group 5 and the finishing rolling mill group 10, in the case of special steel mainly made of SUS, Bonding can be performed in the rolled bar state, and rough rolling can be performed in the slab state, which is the reverse of the conventional method. For this reason, rough rolling can be performed using one rolling mill R1 in a reversible manner, and special steel can also be rolled with the three ordinary rolling mills R1 to R3 required for rough rolling of ordinary steel. Rolling can be performed continuously.

即ち、粗圧延機の台数を減少した連続圧延が可能となる
That is, continuous rolling can be performed with a reduced number of rough rolling mills.

また、SUS材はスケールが生じ難いので、粗圧延後の
バー材を保温のためコイル72に巻取り、その先端を巻
戻して先行するバー材の尾端と接合することができ、こ
れによりバー材の接合を温度低下を少なくしてかつ表面
品質を悪化させずに実施することができる。また、コイ
ルに一旦巻き取ることにより、粗圧延と仕上げ圧延間の
距離を減少した連続圧延が可能となる。
In addition, since SUS material is difficult to form scale, the roughly rolled bar material can be wound around a coil 72 for heat retention, and its tip can be unwound and joined to the tail end of the preceding bar material. Bonding of materials can be carried out with less temperature drop and without deteriorating surface quality. In addition, by once winding it into a coil, continuous rolling with a reduced distance between rough rolling and finishing rolling becomes possible.

一方、普通鋼は1回の圧延量を大きくとれるので、粗圧
延機R1〜R3が3台であっても、粗圧延前にスラブを
接合し、連続的に粗圧延することが可能である。また、
連続的な粗圧延を行うことにより、従来のスラブの圧延
で見られたスラブ先後端でのフィシュテールやタング状
の不良部の発生が防止され、粗圧延における歩留まり低
下を最少限にとどめることができる。
On the other hand, ordinary steel can be rolled in a large amount at one time, so even if there are three rough rolling mills R1 to R3, it is possible to join the slabs before rough rolling and perform continuous rough rolling. Also,
Continuous rough rolling prevents the occurrence of fishtails and tongue-shaped defects at the front and rear ends of the slab that are seen in conventional slab rolling, and minimizes the yield loss during rough rolling. can.

また、普通鋼はSUS材に比ベスケールが発生し易い欠
点があるが、粗圧延後のバー材はコイルに巻き取ること
なく連続的に仕上げ圧延される。
Furthermore, although common steel has the disadvantage that scaling is more likely to occur than SUS material, the bar material after rough rolling is continuously finish rolled without being wound into a coil.

このため、バー材のコイル巻取り時に見られるスケール
の母材への食い込みは起こらず、表面品質の良好な薄板
製品が得られる。
For this reason, the scale digging into the base material that occurs when coiling the bar material does not occur, and a thin plate product with good surface quality can be obtained.

以上の実施例設備において、製造される主な製品の仕様
は下記の通りである。
In the above example equipment, the specifications of the main products manufactured are as follows.

普通鋼としては低炭鋼、中炭鋼等が圧延でき、特殊鋼と
してはSUS材、高炭素鋼、高張力鋼、Si鋼等が適用
可能である。スラブの厚みは通常300〜120mm間
で適度に選ぶことができ、板幅は700〜2000■以
内である。
As ordinary steel, low carbon steel, medium carbon steel, etc. can be rolled, and as special steel, SUS material, high carbon steel, high tensile strength steel, Si steel, etc. can be applied. The thickness of the slab can be selected appropriately, usually between 300 and 120 mm, and the width of the slab is between 700 and 2000 mm.

スラブの均熱炉を出た後の温度は1200°C前後、バ
ー材で1100〜1000°C1仕上げ圧延後は800
〜920°C程度であり、巻取りは550〜780°C
程度で行われる。薄板製品の板厚は1.0〜12.5m
mであり、仕上げ圧延直後の最大圧延速度は約1200
 m /minである。
The temperature of the slab after leaving the soaking furnace is around 1200°C, 1100-1000°C for bar material, 800°C after finishing rolling.
~920°C, and winding is 550~780°C
It is done to a certain degree. The thickness of thin plate products is 1.0 to 12.5m.
m, and the maximum rolling speed immediately after finish rolling is approximately 1200 m.
m/min.

なお、以上の実施例では、スラブ15の先後端に凹み2
5を予成形したが、勿論、スラブの厚みの条件によって
凹み予成形のプレス処理を行わなくてよい。ただし、上
述したようにこの予成形を行う場合は、スラブの接合面
積が減少して接合を容易にするという効果、又は粗圧延
機への噛込み性を良好にするという効果がある。
In addition, in the above embodiment, a recess 2 is formed at the front and rear ends of the slab 15.
5 was preformed, but of course, depending on the condition of the thickness of the slab, it may not be necessary to perform the press treatment for concave preforming. However, when this preforming is performed as described above, there is an effect that the joining area of the slab is reduced and joining is facilitated, or that the biting property in the rough rolling mill is improved.

また、以上の実施例では、粗圧延機は3台、仕上圧延機
は6台としたが、これらに各々1〜2台の増減を行って
もよい。
Further, in the above embodiment, the number of rough rolling mills is three and the number of finishing rolling mills is six, but each of these may be increased or decreased by one or two.

また、以上の実施例では、SUS材は粗圧延後コイルに
巻取って接合したが、巻取らずに直接接合機に送り込み
、粗圧延機より出たバー材の先端と先行するバー材の尾
端とを接合してもよい。ただし、コイルに巻き取る場合
は、上述したようにバー材が接合時間中に冷えることを
防止でき、また粗圧延機と仕上げ圧延機間の距離を短縮
できるという効果がある。
In addition, in the above examples, the SUS material was roughly rolled and then wound around a coil and joined together, but the SUS material was directly fed into a joining machine without being wound up, and the end of the bar material coming out of the rough rolling machine and the tail of the preceding bar material were used. The ends may be joined. However, when winding into a coil, the bar material can be prevented from cooling during the joining time as described above, and the distance between the rough rolling mill and the finishing mill can be shortened.

更に、上記実施例では、接合法については、突き合わせ
面のガス噴流による溶剤後圧着による接合について述べ
たが、勿論よく知られているフラッシュバット、抵抗溶
接等、その他各種の方法が適用できる。
Further, in the above embodiments, the joining method was described as joining by pressure bonding after a solvent using a gas jet on the abutting surfaces, but of course, various other methods such as well-known flash butt, resistance welding, etc. can be applied.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、圧延材の鋼種に応じて、粗圧延前のス
ラブの状態あるいは粗圧延後のバー材の状態のいずれで
圧延材の接合を行うかを選択して圧延するので、特殊で
複雑な粗圧延機を用いることなく、粗圧延機の台数を減
少した連続圧延が可能となる。
According to the present invention, rolling is performed by selecting whether to join the rolled material in the slab state before rough rolling or in the bar state after rough rolling, depending on the steel type of the rolled material. Continuous rolling with a reduced number of rough rolling mills is possible without using a complicated rough rolling mill.

また、スラブの状態で接合するときは連続的な粗圧延が
行えるので、スラブ先後端でのフィシュテールやタング
状の不良部の発生が防止され、粗圧延における歩留まり
低下を最少限にとどめることができる。
In addition, since continuous rough rolling can be performed when joining slabs, the occurrence of fishtails and tongue-shaped defects at the front and rear ends of the slabs is prevented, and the decrease in yield during rough rolling can be kept to a minimum. can.

また、スラブの状態で接合するときは粗圧延から仕上げ
圧延まで連続圧延するので、スケールが発生し易い普通
鋼をスラブの状態で接合して、スケールによる傷付きの
ない連続圧延が行え、バー材の状態で接合を行うときは
、粗圧延後のバー材を一旦コイルに巻取れるので、SU
S材を主にした特殊鋼の接合をバー材で接合して、温度
低下を少なくした連続圧延が可能であり、両者とも、表
面品質の良好な薄板製品を製造することができる。
In addition, when joining in the form of slabs, continuous rolling is performed from rough rolling to finish rolling, so ordinary steel, which is prone to scale, can be joined in the form of slabs and continuous rolling can be performed without damage caused by scale. When joining in this state, the bar material after rough rolling can be wound into a coil, so SU
By joining special steels mainly made of S material with bar materials, continuous rolling with less temperature drop is possible, and in both cases, thin plate products with good surface quality can be manufactured.

更に、バー材の状態で接合を行うときは、粗圧延後のバ
ー材を一旦コイルに巻取るので、粗圧延機と仕上圧延機
間の距離を減少した連続圧延が可能である。
Furthermore, when joining the bar material, the bar material after rough rolling is once wound up into a coil, so continuous rolling can be performed with a reduced distance between the rough rolling mill and the finishing rolling mill.

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

第1図は本発明の一実施例による連続熱間薄板圧延設備
のスラブ接合時の全体構成を示す概略図であり、第2図
は鋳片プレス及び切断装置のそくめ断面図であり、第3
図は接合装置の側面断面図であり、第4図は接合装置の
溶剤バーナ部の詳細図であり、第5図は本実施例設備の
バー材接合時の全体構成を示す概略図であり、第6図は
本実施例設備の代表的圧延スケジュールを示す図であり
、第7図は普通鋼とステンレス鋼の物性値の比較図であ
る。 符号の説明 1・・・連続鋳造機 2・・・鋳片プレス及び切断装置 4・・・スラブ接合機(接合装置) 5・・・粗圧延機群 6・・・コイル巻取り巻戻し装置 計・・バー材接合機(接合装置) R1・・・可逆圧延可能な粗圧延機
FIG. 1 is a schematic diagram showing the overall configuration of a continuous hot thin plate rolling equipment during slab joining according to an embodiment of the present invention, FIG. 2 is a final sectional view of a slab press and cutting device, and FIG. 3
4 is a detailed view of the solvent burner section of the welding device, and FIG. 5 is a schematic diagram showing the overall configuration of the equipment of this embodiment when joining bar materials, FIG. 6 is a diagram showing a typical rolling schedule of the equipment of this embodiment, and FIG. 7 is a diagram comparing the physical property values of common steel and stainless steel. Explanation of symbols 1... Continuous casting machine 2... Slab pressing and cutting device 4... Slab joining machine (joining device) 5... Rough rolling mill group 6... Coil winding and unwinding device total ... Bar material joining machine (joining device) R1 ... Rough rolling machine capable of reversible rolling

Claims (9)

【特許請求の範囲】[Claims] (1)圧延材を順次接合して連続的に熱間圧延を行い、
薄板製品を製造する連続熱間薄板圧延方法において、圧
延材の鋼種に応じて、粗圧延前のスラブの状態あるいは
粗圧延後のバー材の状態のいずれで圧延材の接合を行う
かを選択し、その選択した状態で圧延材を接合し、連続
的に熱間圧延を行うことを特徴とする連続熱間薄板圧延
方法。
(1) Rolled materials are sequentially joined and hot rolled continuously,
In the continuous hot sheet rolling method for producing thin sheet products, it is selected whether to join the rolled materials in the slab state before rough rolling or in the bar state after rough rolling, depending on the steel type of the rolled material. , a continuous hot thin plate rolling method characterized in that the rolled materials are joined in the selected state and hot rolling is performed continuously.
(2)請求項1記載の連続熱間薄板圧延方法において、
前記圧延材が普通鋼のときはスラブの状態で接合を行い
、ステンレス鋼を中心とした特殊鋼のときはバー材の状
態で接合を行うことを特徴とする連続熱間薄板圧延方法
(2) In the continuous hot thin plate rolling method according to claim 1,
A continuous hot thin plate rolling method characterized in that when the rolled material is ordinary steel, the joining is performed in a slab state, and when the rolled material is special steel, mainly stainless steel, it is joined in the state of a bar material.
(3)請求項1記載の連続熱間薄板圧延方法において、
バー材の状態で圧延材の接合を行うときは、粗圧延後の
バー材を一旦コイルに巻取り、その後これを巻戻して前
記接合を行うことを特徴とする連続熱間薄板圧延方法。
(3) In the continuous hot thin plate rolling method according to claim 1,
A continuous hot thin plate rolling method characterized in that when joining rolled materials in the state of bar materials, the roughly rolled bar material is once wound into a coil, and then the coil is unwound to perform the joining.
(4)請求項1記載の連続熱間薄板圧延方法において、
バー材の状態で圧延材の接合を行うときのスラブの粗圧
延は、少なくとも1台の圧延機で可逆圧延を行う工程を
含むことを特徴とする連続熱間薄板圧延方法。
(4) In the continuous hot thin plate rolling method according to claim 1,
A continuous hot thin plate rolling method characterized in that rough rolling of a slab when joining rolled materials in the state of a bar material includes a step of performing reversible rolling in at least one rolling mill.
(5)請求項1記載の連続熱間薄板圧延方法において、
前記圧延材の接合は、先行圧延材の後端と後続圧延材の
先端を隙間を設けた突き合わせ、この状態で両者の突き
合わせ面を切断ガスで溶剤した後、当該溶剤部を圧着す
ることにより行うことを特徴とする連続熱間薄板圧延方
法。
(5) In the continuous hot thin plate rolling method according to claim 1,
The above-mentioned rolled materials are joined by butting the rear end of the preceding rolled material and the leading end of the subsequent rolling material with a gap, applying a solvent to the abutting surfaces of both in this state with cutting gas, and then crimping the solvent part. A continuous hot thin plate rolling method characterized by:
(6)請求項1記載の連続熱間薄板圧延方法において、
前記スラブを連続鋳造ラインにて製造し、その製造過程
でスラブの先後端を凹ます予成形を施すことを特徴とす
る連続熱間薄板圧延方法。
(6) In the continuous hot thin plate rolling method according to claim 1,
A method for continuous hot thin plate rolling, characterized in that the slab is manufactured in a continuous casting line, and preforming is performed to concave the leading and trailing ends of the slab during the manufacturing process.
(7)圧延材を順次接合して連続的に熱間圧延を行い、
薄板製品を製造する連続熱間薄板圧延設備において、粗
圧延設備及び仕上げ圧延設備と、粗圧延設備の入側及び
仕上げ圧延設備の入側のそれぞれに配置された圧延材の
接合装置とを備えることを特徴とする連続熱間薄板圧延
設備。
(7) The rolled materials are sequentially joined and hot rolled continuously,
A continuous hot thin plate rolling facility for manufacturing thin plate products, comprising a rough rolling facility, a finishing rolling facility, and a joining device for rolled materials disposed at the entry side of the rough rolling facility and at the entry side of the finishing rolling facility, respectively. Continuous hot thin plate rolling equipment featuring:
(8)請求項7記載の連続熱間薄板圧延設備において、
前記粗圧延設備の出側に粗圧延後のバー材をコイルに巻
取りかつこれを巻戻すコイル巻取り巻戻し装置を設置し
たことを特徴とする連続熱間薄板圧延設備。
(8) In the continuous hot thin plate rolling equipment according to claim 7,
A continuous hot thin plate rolling facility characterized in that a coil winding and unwinding device for winding and unwinding the bar material after rough rolling into a coil is installed on the exit side of the rough rolling facility.
(9)請求項7記載の連続熱間薄板圧延設備において、
前記粗圧延設備は複数台の粗圧延機を含み、その内の少
なくとも1台を可逆圧延可能な圧延機としたことを特徴
とする連続熱間薄板圧延設備。
(9) In the continuous hot thin plate rolling equipment according to claim 7,
The continuous hot thin plate rolling equipment is characterized in that the rough rolling equipment includes a plurality of rough rolling mills, at least one of which is a rolling mill capable of reversible rolling.
JP22481790A 1990-08-27 1990-08-27 Method and equipment for continuous hot rolling of thin sheet Pending JPH04105701A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22481790A JPH04105701A (en) 1990-08-27 1990-08-27 Method and equipment for continuous hot rolling of thin sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22481790A JPH04105701A (en) 1990-08-27 1990-08-27 Method and equipment for continuous hot rolling of thin sheet

Publications (1)

Publication Number Publication Date
JPH04105701A true JPH04105701A (en) 1992-04-07

Family

ID=16819666

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22481790A Pending JPH04105701A (en) 1990-08-27 1990-08-27 Method and equipment for continuous hot rolling of thin sheet

Country Status (1)

Country Link
JP (1) JPH04105701A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0795361A1 (en) * 1996-03-15 1997-09-17 DANIELI & C. OFFICINE MECCANICHE S.p.A. Method for the continuous rolling of plate and/or strip and the relative continuous rolling line
EP0806254A1 (en) * 1996-05-07 1997-11-12 Nkk Corporation Continuous rolling method of billet and apparatus therefor
EP0842714A2 (en) * 1996-11-13 1998-05-20 Ishikawajima-Harima Heavy Industries Co., Ltd. Rolled plate joining apparatus and continuous hot rolling apparatus equipped with the same
EP0845308A1 (en) * 1996-11-28 1998-06-03 Sms Schloemann-Siemag Aktiengesellschaft Hot rolling plant
JP2007175766A (en) * 2005-12-26 2007-07-12 Mitsubishi-Hitachi Metals Machinery Inc Method for shear-joining continuously hot-rolled high-carbon steel material, and continuous hot-rolling apparatus
JP2007175767A (en) * 2005-12-26 2007-07-12 Mitsubishi-Hitachi Metals Machinery Inc Method for shear-joining continuously hot-rolled low-carbon steel material, and continuous hot-rolling apparatus
CN102728611A (en) * 2011-10-07 2012-10-17 庞廷 Method and apparatus for producing cut to length bars in a steel mill
US11883897B1 (en) 2022-09-08 2024-01-30 David Teng Pong Flash welding for billets with down cut billet ends

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5924184A (en) * 1996-03-15 1999-07-20 Danieli & C. Officine Meccaniche Spa Method for the continuous rolling of plate and/or strip and the relative continuous rolling line
EP0795361A1 (en) * 1996-03-15 1997-09-17 DANIELI & C. OFFICINE MECCANICHE S.p.A. Method for the continuous rolling of plate and/or strip and the relative continuous rolling line
EP0806254A1 (en) * 1996-05-07 1997-11-12 Nkk Corporation Continuous rolling method of billet and apparatus therefor
US5957367A (en) * 1996-05-07 1999-09-28 Nkk Corporation Continuous rolling method of billet and apparatus therefor
US6406413B2 (en) 1996-11-13 2002-06-18 Ishikawajima-Harima Heavy Industries Co., Ltd. Rolled plate joining apparatus and continuous hot rolling apparatus equipped with the same
EP0842714A3 (en) * 1996-11-13 1998-09-30 Ishikawajima-Harima Heavy Industries Co., Ltd. Rolled plate joining apparatus and continuous hot rolling apparatus equipped with the same
EP1160022A2 (en) * 1996-11-13 2001-12-05 Ishikawajima-Harima Heavy Industries Co., Ltd. Continuous hot rolling apparatus
EP1160022A3 (en) * 1996-11-13 2001-12-19 Ishikawajima-Harima Heavy Industries Co., Ltd. Continuous hot rolling apparatus
EP0842714A2 (en) * 1996-11-13 1998-05-20 Ishikawajima-Harima Heavy Industries Co., Ltd. Rolled plate joining apparatus and continuous hot rolling apparatus equipped with the same
EP0845308A1 (en) * 1996-11-28 1998-06-03 Sms Schloemann-Siemag Aktiengesellschaft Hot rolling plant
JP2007175766A (en) * 2005-12-26 2007-07-12 Mitsubishi-Hitachi Metals Machinery Inc Method for shear-joining continuously hot-rolled high-carbon steel material, and continuous hot-rolling apparatus
JP2007175767A (en) * 2005-12-26 2007-07-12 Mitsubishi-Hitachi Metals Machinery Inc Method for shear-joining continuously hot-rolled low-carbon steel material, and continuous hot-rolling apparatus
CN102728611A (en) * 2011-10-07 2012-10-17 庞廷 Method and apparatus for producing cut to length bars in a steel mill
US11883897B1 (en) 2022-09-08 2024-01-30 David Teng Pong Flash welding for billets with down cut billet ends

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