JP3377924B2 - Apparatus and method for joining billets - Google Patents

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】この発明は、鋼片の接合装置
および接合方法に関し、とくに熱間で粗圧延後に先行材
の後端部と後行材の先端部とが切断・加熱・圧接され、
連続仕上圧延に供される鋼片の接合装置および接合方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining apparatus and joining method for steel slabs, and in particular, after the hot rolling, the trailing edge of the preceding material and the leading edge of the following material are cut, heated and pressure welded.
TECHNICAL FIELD The present invention relates to a joining device and joining method for a steel slab used for continuous finish rolling.

【０００２】[0002]

【従来の技術】従来、鋼片の熱間圧延操業では、加熱炉
から抽出された鋼片を一本ずつ圧延していたために、と
くに仕上圧延工程において、鋼片先端の仕上圧延機への
噛込み不良およびランナウトテーブル上での走行突っか
かり、鋼片後端の絞り込み、鋼片先端・後端の寸法不良
など種々のトラブルが生じていた。かかるトラブルの抜
本的打開策として、仕上圧延機入側の搬送ライン上で、
鋼片の先行材後端部と後行材先端部を順次互いに突き合
わせ接合して仕上圧延に供する連続圧延法（エンドレス
圧延法）が提案され、これに伴い、鋼片のオンライン接
合技術に関しても種々の方法・装置が開発されている。2. Description of the Related Art Conventionally, in the hot rolling operation of billets, the billets extracted from the heating furnace are rolled one by one. Therefore, especially in the finish rolling process, the tip of the billet is caught in the finish rolling machine. Various problems such as improper insertion, run-on-run on the runout table, narrowing of the rear end of the steel piece, and defective dimension of the front and rear end of the steel piece occurred. As a drastic measure against such troubles, on the transfer line on the entry side of the finishing rolling mill,
A continuous rolling method (endless rolling method) has been proposed in which the trailing edge of the leading material and the leading edge of the trailing material of the steel slab are butt-joined to each other and used for finish rolling. Methods and devices have been developed.

【０００３】中でも、特開昭60-244401 号公報に開示さ
れる誘導加熱圧接法は、短時間で接合を終了できる方法
として知られている。この方法は、加熱手段にソレノイ
ド型コイルを用い、接合されるべき先行材後端部と後行
材先端部を急速加熱し、互いに突き合わせて圧接（アッ
プセット）することにより接合するものである。これに
使用される接合装置は、特開平7-241601号公報などにみ
られるように、鋼片の先行材後端部と後行材先端部を加
熱・圧接する接合機と、その上流にあって当該後端部・
先端部を切りそろえる切断機（クロップシヤー）とから
なり、切断機入側、接合機入側出側には鋼片の所定外の
動きを拘束するガイドが備えられている。Among them, the induction heating pressure welding method disclosed in Japanese Patent Laid-Open No. 60-244401 is known as a method capable of completing the joining in a short time. In this method, a solenoid type coil is used as a heating means, and the rear end portion of the preceding material and the front end portion of the following material to be joined are rapidly heated, and they are brought into contact with each other and pressed (upset) to join them. The joining device used for this is, as seen in Japanese Patent Laid-Open No. 7-241601, a joining machine for heating and pressure welding the trailing end of the preceding material and the leading end of the following material of the steel slab, and the upstream of the joining machine. The rear end
A cutting machine (crop shear) for trimming the tips is provided, and guides are provided on the cutting machine entrance side and the joining machine entrance side and the exit side for restraining irregular movements of the steel pieces.

【０００４】[0004]

【発明が解決しようとする課題】誘導加熱圧接法により
鋼片を接合するとき、前記特開平7-241601号公報などに
開示される従来のガイドでは拘束力が不十分なためであ
ろうか、以下のような被接合部突き合わせ不良が生じて
接合トラブルを招くことがある。 (1) 図３（ａ）に示すように、接合前に隙間13を挟んで
端面を突き合わされた鋼片（シートバー）の先行材12と
後行材11の板幅中心線14が、ミル幅中心線15と一致しな
い状態（センターずれという）が生じることがある。図
示しない誘導加熱用のインダクタの中心はミル幅中心線
15に合わせてあるので、かかるセンターずれが生じる
と、ミル幅中心線15に対し広幅側の被加熱端部では誘導
電流密度が過大となってここが昇温過剰域17となり、狭
幅側の被加熱端部では逆に誘導電流密度が過小となって
ここが昇温不足域18となるというように、加熱での昇温
レベルが板幅方向に不均一となって接合に失敗する。 (2) 切断機のところで板幅中心線がミル幅中心線に対し
て傾斜したまま先端・後端がカットされたためと思われ
るが、図３（ｂ）に示すように、接合機のところで板幅
中心線をミル幅中心線15に首尾よく一致させて被加熱端
面を突き合わせたときに、先行材12と後行材11の突き合
わされた端面同士の隙間13が平面視で一方の側にハの字
形状に開いたいわゆる口開き状態となってしまうことが
ある。この場合には上記(1) のような板幅方向の加熱不
均一は生じず、両端部は板幅方向で均一に各鋼種の融点
によって決まる適正昇温域19に収まるのであるが、アッ
プセット量は当然ながら隙間13の最も広いハの字の開き
側に対して決められるので、その目標値が設定可能範囲
を超えて大きくなり、さらに、ハの字の閉じ側では適正
昇温域19の背後の未昇温域16（低温のため変形抵抗大）
までも含めてアップセットせねばならず、所要アップセ
ット力が不足する等々から、接合部に未接合部分が残
り、仕上圧延中に接合部破断を起こす。When joining steel pieces by the induction heating pressure welding method, it may be because the conventional guides disclosed in the above-mentioned JP-A-7-241601 and the like have insufficient binding force. As described above, there may be a case where a joint failure occurs in the jointed portions and a joining trouble is caused. (1) As shown in FIG. 3 (a), the plate width center line 14 of the preceding material 12 and the following material 11 of the steel pieces (sheet bars) whose end surfaces are butted against each other with the gap 13 in between is joined by the mill. A state that does not coincide with the width center line 15 (called center deviation) may occur. The center of the inductor for induction heating (not shown) is the mill width center line
Since the center deviation occurs, the induced current density becomes excessive at the heated end on the wide side with respect to the mill width center line 15, and this becomes the excessive temperature rise region 17 and the narrow side On the contrary, at the heated end, the induced current density becomes excessively small and this becomes the insufficient temperature rise region 18, so that the temperature rise level during heating becomes non-uniform in the plate width direction and the joining fails. (2) It seems that the front and rear edges were cut at the cutting machine while the plate width centerline was tilted with respect to the mill width centerline. When the width center line is successfully aligned with the mill width center line 15 and the heated end faces are abutted, a gap 13 between the abutted end faces of the preceding material 12 and the following material 11 is seen on one side in plan view. There may be a so-called open state in which it is opened in a V shape. In this case, heating non-uniformity in the plate width direction as in (1) above does not occur and both ends are uniformly set in the plate width direction within the proper temperature rising region 19 determined by the melting point of each steel type. Since the amount is naturally determined for the wide side of the opening of the C-shape of the gap 13, the target value exceeds the settable range and becomes large. Unheated area 16 behind (large deformation resistance due to low temperature)
Including the above, up-setting must be performed, and the required up-setting force is insufficient, etc., so that the unbonded part remains in the bonded part and the bonded part is broken during finish rolling.

【０００５】これらのトラブルを防止するには、接合機
のインダクタ中心をセンターずれした板幅中心線に追従
させるように位置制御する、および、接合機のアップセ
ット力を高めるといったことが考えられる。しかし、そ
のような対策は、設備の複雑化・大規模化が避けられ
ず、経済・スペース両面の制約から自ずと限界がある。
この発明の目的は、上記従来技術の問題点を解決すべ
く、連続仕上圧延に供される熱間鋼片の接合（切断・加
熱・圧接）時に、該鋼片の先行材と後行材を幅方向に正
確にセンタリングできる鋼片の接合装置および接合方法
を提案することにある。In order to prevent these troubles, it is conceivable to control the position of the inductor center of the joining machine so as to follow the plate width center line deviated from the center and to increase the upsetting force of the joining machine. However, such measures are inevitably complicated and large-scaled, and are naturally limited due to economic and space constraints.
An object of the present invention is to solve the above-mentioned problems of the prior art by joining a preceding material and a following material of a steel slab at the time of joining (cutting / heating / pressure welding) of a hot slab to be subjected to continuous finish rolling. It is an object to propose a joining device and joining method for steel pieces that can be accurately centered in the width direction.

【０００６】[0006]

【課題を解決するための手段】この発明は、熱間圧延ラ
イン上で粗圧延機と仕上圧延機との間に配設され、粗圧
延後の鋼片の先行材後端部と後行材先端部を切断する切
断機と、切断後の前記後端部と前記先端部を加熱・圧接
する接合機とからなる鋼片の接合装置において、鋼片を
両側から挟持してセンタリングするサイドガイドを、切
断機入側５ｍを超えない近接箇所と切断機入側５ｍを超
え30ｍを超えない遠隔箇所に少なくとも各一対、切断機
出側５ｍを超えない近接箇所と接合機入側５ｍを超えな
い近接箇所に少なくとも各一対、接合機出側５ｍを超え
ない近接箇所と接合機出側５ｍを超え30ｍを超えない遠
隔箇所に少なくとも各一対の、少なくとも計六対備えた
ことを特徴とする鋼片の接合装置である。SUMMARY OF THE INVENTION The present invention is arranged on a hot rolling line between a rough rolling mill and a finish rolling mill, and the leading end and the trailing end of a preceding material of a steel slab after rough rolling are provided. In a steel piece joining device comprising a cutting machine for cutting the tip portion and a joining machine for heating and press-welding the rear end portion and the tip portion after cutting, a side guide for sandwiching and centering the steel piece from both sides is provided. , 5m above the cutting machine entrance side and 5m above the cutting machine entrance side
At least each pair of far 隔箇 plants not exceeding example 30 m, Do exceeds the bonding machine entry side 5m and the proximity portion not exceeding cutter exit side 5m
At least one pair at each adjacent location, exceeding the joining machine exit side of 5 m
No close location and the joining machine exit side is more than 5 m and far not more than 30 m
It is a joining device for steel slabs, characterized in that at least one pair, at least six pairs in total, are provided at separate locations.

【０００７】また、この発明は、粗圧延後の鋼片の先行
材後端部と後行材先端部を請求項１記載の接合装置によ
り切断・加熱・圧接する際に前記サイドガイドを用いて
鋼片を両側から挟持してセンタリングするにあたり、先
行材・後行材をそれぞれ後端部・先端部付近を含む長手
方向の少なくとも二箇所で挟持することを特徴とする鋼
片の接合方法である。Further, according to the present invention, the side guide is used when cutting, heating, and pressure-welding the trailing end portion of the preceding material and the leading end portion of the following material of the rough-rolled steel slab by the joining device according to claim 1. When sandwiching and centering a steel slab from both sides, a joining method of steel slabs is characterized in that a preceding material and a following material are respectively sandwiched at at least two positions in the longitudinal direction including the vicinity of the rear end portion and the front end portion. .

【０００８】[0008]

【発明の実施の形態】この発明では、熱間圧延ライン上
で粗圧延機と仕上圧延機との間に配設され、粗圧延後の
鋼片の先行材後端部と後行材先端部を切断する切断機
と、切断後の前記後端部と前記先端部を加熱・圧接する
接合機とからなる鋼片の接合装置において、鋼片を両側
から挟持してセンタリングするサイドガイドを、切断機
入側の近接・遠隔各箇所に少なくとも各一対、切断機出
側と接合機入側の各近接箇所に少なくとも各一対、接合
機出側の近接・遠隔各箇所に少なくとも各一対の、少な
くとも計六対備えることとし、この接合装置により粗圧
延後の鋼片の先行材後端部と後行材先端部を切断・加熱
・圧接する際に前記サイドガイドを用いて鋼片を両側か
ら挟持してセンタリングするにあたり、先行材・後行材
をそれぞれ後端部・先端部付近を含む長手方向の少なく
とも二箇所で挟持することとした。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the leading end and trailing end of the preceding material and the trailing material of the steel strip after the rough rolling are arranged on the hot rolling line between the rough rolling mill and the finish rolling mill. In a joining device for a steel piece, which comprises a cutting machine for cutting the steel sheet, and a joining machine for heating and pressing the rear end portion and the front end portion after cutting, a side guide for sandwiching and centering the steel piece from both sides is cut. At least one pair at each near / remote location on the machine entry side, at least one pair at each near location on the cutter exit side and joining machine entry side, at least one pair at each near / remote location on the joining machine exit side Six pairs are to be provided, and this joining device clamps the steel pieces from both sides using the side guides when cutting, heating, and pressure-welding the trailing edge of the preceding material and the leading edge of the trailing material of the rough rolled steel piece. Centering, the leading and trailing materials are It decided to nip in the longitudinal direction of the at least two positions including the vicinity of the end portion.

【０００９】なお、サイドガイドとは周知のように、そ
の対をなす一方と他方がミル幅中心線を挟んで向き合
い、かつ該ミル幅中心線からの距離を両者で等しく保ち
ながら幅方向に移動できる機能を持たせて設けられるも
のであるから、鋼片を二対以上のサイドガイドで挟持し
てセンタリングするには、それぞれの対で同時に同じ要
領で、対をなす一方と他方の間隔（開度という）を、鋼
片の到着前には鋼片幅に余裕代を加算した量だけ開いて
おき、鋼片到着時に開度を閉めて鋼片を挟持してやれば
よい。As is well known, the side guides face each other with the mill width center line sandwiched between one and the other of the pair, and move in the width direction while maintaining the same distance from the mill width center line. Since it is provided with a function that enables it, in order to sandwich and center a steel slab with two or more pairs of side guides, the spacing (opening) between one and the other of the pair (open The degree) is opened by an amount obtained by adding a margin allowance to the width of the billet before arrival of the billet, and the opening is closed when the billet arrives to clamp the billet.

【００１０】この発明によれば、鋼片は長手方向の少な
くとも二箇所で幅方向から挟持されるから、鋼片に対し
て大きなセンタリング力を及ぼすことが可能となり、一
連の接合工程（先行材後端カット、後行材先端カット、
該両カット部加熱・圧接）でのセンタリング確度が向上
する。したがって、従来の問題点である、接合機のとこ
ろでの突き合わせ面のセンターずれ、および切断機での
端部斜めカットによる突き合わせ面の口開きといった突
き合わせ不良に起因する接合失敗を確実に防止すること
ができる。According to the present invention, since the steel piece is sandwiched from at least two positions in the longitudinal direction from the width direction, a large centering force can be exerted on the steel piece, and a series of joining steps (preceding material Edge cut, trailing material tip cut,
The centering accuracy in both heating / press contact of both cut portions is improved. Therefore, it is possible to surely prevent the conventional failure, that is, the joint failure due to the misalignment of the abutting surfaces at the joining machine and the opening of the abutting surfaces due to the oblique cutting of the ends of the cutting machine. it can.

【００１１】なお、最少限計六対のサイドガイドのうち
少なくとも四対を切断機および接合機の入側・出側の近
接箇所にそれぞれ配置し、センタリングにあたり先行材
・後行材をそれぞれ後端部・先端部付近を含む長手方向
の少なくとも二箇所で挟持するとしたのは、先行材後端
部または後行材先端部にキャンバ（曲がり）がある場合
でも正確にセンタリングが行えるようにするためであ
る。It should be noted that at least four pairs of the minimum six pairs of side guides are arranged at the adjoining positions of the entrance side and the exit side of the cutting machine and the joining machine respectively, and the leading material and the trailing material are respectively arranged at the rear end for centering. The reason for sandwiching at least two places in the longitudinal direction including the part and the tip is to enable accurate centering even when there is a camber (bend) at the trailing edge of the preceding material or the leading edge of the following material. is there.

【００１２】[0012]

【実施例】図１は、この発明が実施される熱間圧延ライ
ンの要部設備レイアウト例の、（ａ）は概略側面図、
（ｂ）は概略平面図である。同図において、１は図示し
ない粗圧延機により粗圧延された鋼片（シートバー）を
巻き取るシートバー巻取機、２はシートバー巻取機から
巻きだされるシートバーの端部（クロップ）を切断する
クロップシヤー（切断機）、３はクロップシヤー２で切
断されたシートバーの先行材12後端部と後行材11先端部
を突き合わせて誘導加熱しアップセットする誘導加熱・
圧接型の接合機であり、これらクロップシヤー２と接合
機３とで接合装置が構成されている。この接合装置によ
って接合されたシートバーは、タンデム式仕上圧延機の
第１段目をなす仕上ミル第１スタンド４に連続的に送り
込まれて仕上圧延される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic side view of an example of an essential equipment layout of a hot rolling line according to the present invention,
(B) is a schematic plan view. In the figure, 1 is a sheet bar winder that winds a steel strip (sheet bar) roughly rolled by a rough rolling machine (not shown), and 2 is an end portion (crops) of a sheet bar that is unwound from the sheet bar winder. ) Is cut by a shearing machine (cutting machine), 3 is induction heating for upsetting by inducing the rear end of the leading member 12 and the leading end of the trailing member 11 of the sheet bar cut by the crop shear 2 by inductive heating.
It is a pressure welding type joining machine, and the crop shear 2 and the joining machine 3 constitute a joining device. The sheet bar joined by this joining apparatus is continuously fed to the finishing mill first stand 4 which is the first stage of the tandem finishing mill to finish rolling.

【００１３】この接合装置は、この発明に従い、シート
バーの後行材11、先行材12を両側から挟持して幅方向に
センタリングするサイドガイド５〜10を、切断機２入側
の近接・遠隔各箇所に各一対（６，５）、切断機２出側
と接合機３入側の各近接箇所に各一対（７，８）、接合
機３出側の近接・遠隔各箇所に各一対（９，10）の、計
六対備えたものである。なお、サイドガイド５〜10の添
付符号ａ，ｂは鋼片両側で対をなす一方と他方を意味
し、上記各箇所のサイドガイドは必要に応じて二対以上
であってもよい。According to the present invention, this joining device includes side guides 5 to 10 for sandwiching the trailing member 11 and the leading member 12 of the seat bar from both sides and centering them in the width direction. A pair (6, 5) at each location, a pair (7, 8) at each proximity location of the cutting machine 2 exit side and a joining machine 3 entry side, and a pair at each proximity / remote location of the welding machine 3 exit side ( It has a total of 6 pairs (9, 10). Note that the attached symbols a and b of the side guides 5 to 10 mean one and the other that make a pair on both sides of the steel piece, and the number of side guides at each of the above locations may be two or more as required.

【００１４】この実施例のサイドガイドには、縦ロール
式のものを用いたが、この発明はサイドガイドの型式に
限定されるものではなく、縦ロール式以外にガイドプレ
ート式のものも使用できる。また、この実施例でのシー
トバーの寸法範囲は、厚さ20〜40mm、幅 700〜2000mm、
長さ30〜 130ｍであり、この場合には、近接箇所のサイ
ドガイド６〜９および遠隔箇所のサイドガイド５，10の
設置位置は表１に示す好適設置範囲から選択するのが好
ましい。近接箇所としての好適設置範囲の下限は特には
なく、シャー刃物等機械と干渉しない範囲でなるべく近
くがよいことから０ｍとし、上限は接合面の許容口開き
量とキャンバ量とを考慮して５ｍとした。一方、遠隔箇
所としての好適設置範囲の下限は、キャンバが影響する
長さより外にするために５ｍとし、上限はシートバー最
短長を考慮して30ｍとした。なお、この発明は、表１に
開示する好適設置範囲にない位置に、別段の必要に応じ
てサイドガイドを余計に追加設置することを妨げるもの
ではない。A vertical roll type is used as the side guide of this embodiment, but the present invention is not limited to the side guide type, and a guide plate type other than the vertical roll type can be used. . Further, the size range of the seat bar in this example is 20 to 40 mm in thickness, 700 to 2000 mm in width,
The length is 30 to 130 m, and in this case, it is preferable to select the installation positions of the side guides 6 to 9 at the adjacent places and the side guides 5 and 10 at the remote places from the suitable installation range shown in Table 1. There is no particular lower limit of the suitable installation range as a close location, and it is set to 0 m because it is as close as possible within the range where it does not interfere with machinery such as shear blades, and the upper limit is 5 m considering the allowable opening amount of the joint surface and the camber amount. And On the other hand, the lower limit of the suitable installation range as a remote location is set to 5 m in order to be outside the length affected by the camber, and the upper limit is set to 30 m in consideration of the shortest length of the seat bar. It should be noted that the present invention does not prevent an additional side guide from being additionally installed at a position not in the preferred installation range disclosed in Table 1 as needed.

【００１５】[0015]

【表１】 [Table 1]

【００１６】図２は、実施例のサイドガイドの用法説明
図であり、（ａ）は先行材後端部の切断時、（ｂ）は後
行材先端部の切断時、（ｃ）は先行材後端部と後行材先
端部の加熱・圧接時をそれぞれ示す。同図において、2
1、22は切断線であり、図１と同一または相当部分には
これと同じ符号を付し、説明を省略する。まず、先行材
12後端部の切断時には図２（ａ）に示すように、切断機
２出側と接合機３入側の各近接箇所のサイドガイド７，
８の開度を閉める。これにより先行材12は長手方向の少
なくとも二箇所（うち一箇所は後端部付近）で挟持され
るので確実にセンタリングされる。このとき、必要に応
じてさらに下流側の接合機３出側の近接・遠隔各箇所の
サイドガイド９，10の開度も閉めればセンタリングの確
実性が増すので好ましい。なお、切断機２入側の近接・
遠隔各箇所のサイドガイド６，５については、先行材12
通過後それぞれの開度を開いて後行材を待ち受ける。2A and 2B are views for explaining the usage of the side guide of the embodiment. FIG. 2A is for cutting the trailing edge of the preceding material, FIG. 2B is for cutting the leading edge of the trailing material, and FIG. The heating and pressure welding of the trailing edge of the material and the leading edge of the following material are shown respectively. In the figure, 2
Reference numerals 1 and 22 denote cutting lines, and the same or corresponding portions as those in FIG. 1 are denoted by the same reference numerals and description thereof will be omitted. First, the preceding material
12 When cutting the rear end, as shown in FIG. 2 (a), the side guides 7 at the adjacent positions on the outlet side of the cutting machine 2 and the inlet side of the welding machine 3,
Close the opening of 8. As a result, the preceding material 12 is sandwiched at least at two positions in the longitudinal direction (one of which is near the rear end), so that the preceding material 12 is reliably centered. At this time, it is preferable to close the opening degree of the side guides 9 and 10 at each of the near and remote points on the exit side of the welding machine 3 on the downstream side, if necessary, because the centering reliability increases. In addition, the proximity of the cutting machine 2 input side
For the side guides 6 and 5 at each remote location, the preceding material 12
After passing, open each opening and wait for the trailing material.

【００１７】次いで、後行材11先端部の切断時には図２
（ｂ）に示すように、切断機２入側の近接・遠隔各箇所
のサイドガイド６，５の開度を閉める。これにより後行
材11は長手方向の少なくとも二箇所（うち一箇所は先端
部付近）で挟持されるので確実にセンタリングされる。
このとき、先行材12後端部は接合機３内にあり、先行材
12はこれをその後端部より下流側の接合機３出側の近接
・遠隔各箇所のサイドガイド９，10によって挟持する。
ここでも先行材12は長手方向の少なくとも二箇所で挟持
されるので確実にセンタリングされる。なお、切断機２
出側と接合機３入側の各近接箇所のサイドガイド７，８
の開度は、先行材12の通過後、後行材11が到着するまで
開いておく。Next, at the time of cutting the leading end of the trailing member 11, FIG.
As shown in (b), the opening of the side guides 6 and 5 at each of the proximity and remote locations on the entrance side of the cutting machine 2 is closed. As a result, the trailing member 11 is sandwiched at least at two locations in the longitudinal direction (one of which is near the tip), so that the trailing member 11 is reliably centered.
At this time, the trailing edge of the preceding material 12 is inside the joining machine 3,
12 is sandwiched by the side guides 9 and 10 at each of the near and remote locations on the delivery side of the welding machine 3 downstream of the rear end.
In this case as well, the preceding material 12 is sandwiched at least at two points in the longitudinal direction, so that it is reliably centered. The cutting machine 2
Side guides 7 and 8 near each of the outlet side and the inlet side of the welding machine 3
The opening of is opened after the preceding material 12 has passed and until the following material 11 arrives.

【００１８】そして、先行材12後端部と後行材11先端部
の加熱・圧接時には図２（ｃ）に示すように、先行材12
に対しては接合機３出側の近接・遠隔各箇所のサイドガ
イド９，10の開度を閉めるとともに、後行材11に対して
は切断機２出側と接合機３入側の各近接箇所のサイドガ
イド７，８の開度を閉める。なお、切断機２入側の近接
・遠隔各箇所のサイドガイド６，５については、後行材
11のセンタリング確度をさらによくするために図示のよ
うに開度を閉めたままにしておくのがよい。これによ
り、先行材12、後行材11はそれぞれ長手方向の少なくと
も二箇所（うち一箇所は先行材12にあっては後端部付
近、後行材11にあっては先端部付近）で挟持されるので
確実にセンタリングされる。When the rear end of the preceding material 12 and the leading end of the following material 11 are heated and pressed, as shown in FIG.
For the following, the opening of the side guides 9 and 10 at each of the proximity / remote locations of the joining machine 3 is closed, and for the trailing material 11, the proximity of the cutting machine 2 exit and the joining machine 3 entry side Close the opening of the side guides 7 and 8 at the location. The side guides 6 and 5 near and remote to the cutting machine 2 entry side are the trailing materials.
In order to further improve the centering accuracy of 11, it is preferable to keep the opening closed as shown. As a result, the leading material 12 and the trailing material 11 are sandwiched at least at two positions in the longitudinal direction (one of them is near the rear end of the leading material 12 and near the leading end of the trailing material 11). As a result, it is surely centered.

【００１９】なお、この実施例における熱間圧延ライン
はシートバー巻取機１を備えたものであるが、この発明
の適用範囲はかかるラインのみに限定されるものではな
く、この発明を他の例えば粗圧延後にシートバーを巻き
取らずテーブルローラで直接下流に搬送する形式のライ
ンに適用したときにも、この実施例と同等の作用効果が
得られることはいうまでもない。[0019] Although hot rolling line in this embodiment are those with a sheet bar coiler 1, the scope of the invention is not limited only to those lines, the present invention other Needless to say, even when the sheet bar is applied to a line in which the sheet bar is conveyed directly downstream by the table roller without being wound after rough rolling, the same operational effects as those of this embodiment can be obtained.

【００２０】この発明を図１に示した熱間圧延ラインに
適用した結果、適用前には約30％であった鋼片接合時の
被接合部端面のセンターずれや口開きに起因する接合失
敗の発生率が約０％に激減した。As a result of applying the present invention to the hot rolling line shown in FIG. 1, it was about 30% before the application. The rate of occurrence of was drastically reduced to about 0%.

【００２１】[0021]

【発明の効果】以上に述べたようにこの発明によれば、
連続仕上圧延に供される熱間鋼片の接合（切断・加熱・
圧接）時に、該鋼片の先行材と後行材を幅方向に正確に
センタリングすることができるので、鋼片接合時の被接
合部端面のセンターずれや口開きといった突き合わせ不
良に起因する接合失敗を未然に確実に防止することがで
きるという効果を奏する。As described above, according to the present invention,
Joining of hot steel slabs for continuous finish rolling (cutting, heating,
At the time of pressure welding, the preceding and following materials of the steel slab can be accurately centered in the width direction, so that when the steel slab is joined, joining failure due to butt misalignment such as center misalignment of the end faces of the welded parts or mouth opening There is an effect that it can be surely prevented.

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

【図１】この発明が実施される熱間圧延ラインの要部設
備レイアウト例の、（ａ）は概略側面図、（ｂ）は概略
平面図である。FIG. 1A is a schematic side view and FIG. 1B is a schematic plan view of an example of an essential equipment layout of a hot rolling line in which the present invention is implemented.

【図２】実施例のサイドガイドの用法説明図であり、
（ａ）は先行材後端部の切断時、（ｂ）は後行材先端部
の切断時、（ｃ）は加熱・圧接時をそれぞれ示す。FIG. 2 is an explanatory view of how to use the side guide of the embodiment,
(A) shows the cutting of the trailing edge of the preceding material, (b) shows the cutting of the leading edge of the following material, and (c) shows the heating and pressure welding.

【図３】従来生じていた被接合部突き合わせ不良の説明
図であり、（ａ）はセンターずれ、（ｂ）は口開きをそ
れぞれ示す。FIGS. 3A and 3B are explanatory views of a joint defect in a joint portion that has conventionally occurred, where FIG. 3A shows a center shift and FIG. 3B shows an opening.

【符号の説明】 １ シートバー巻取機 ２ クロップシヤー（切断機） ３ 接合機 ４ 仕上ミル第１スタンド ５〜10 サイドガイド 11 後行材 12 先行材 13 隙間 14 板幅中心線 15 ミル幅中心線 16 未昇温域 17 昇温過剰域 18 昇温不足域 19 適正昇温域 21、22 切断線[Explanation of symbols] 1 Sheet bar winder 2 Crop shear (cutting machine) 3 joining machine 4 Finishing Mill 1st Stand 5-10 side guide 11 Subsequent materials 12 Leading material 13 gap 14 Board width center line 15 mil width centerline 16 Unheated area 17 Excess temperature range 18 Area of insufficient temperature rise 19 Proper heating range 21, 22 cutting line

───────────────────────────────────────────────────── フロントページの続き (72)発明者 二階堂 英幸 千葉県千葉市中央区川崎町１番地 川崎 製鉄株式会社 千葉製鉄所内 (72)発明者 上村 浩一 千葉県千葉市中央区川崎町１番地 川崎 製鉄株式会社 千葉製鉄所内 (72)発明者 清水 益人 千葉県千葉市中央区川崎町１番地 川崎 製鉄株式会社 千葉製鉄所内 (72)発明者 宮本 邦雄 広島県広島市西区観音新町四丁目６番22 号 三菱重工業株式会社 広島製作所内 (72)発明者 黒田 彰夫 広島県広島市西区観音新町四丁目６番22 号 三菱重工業株式会社 広島製作所内 (56)参考文献 特開 平10−128410（ＪＰ，Ａ) (58)調査した分野(Int.Cl.⁷，ＤＢ名) B21B 39/14 B21B 15/00 B21B 1/26 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideyuki Nikaido 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Co., Ltd. Chiba Works (72) Inventor Koichi Uemura 1- Kawasaki-cho, Chuo-ku, Chiba Prefecture Kawasaki Steel Inside the Chiba Works (72) Inventor Masuhito Shimizu 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Co., Ltd. Inside the Chiba Works (72) Kunio Miyamoto 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima Mitsubishi Heavy Industries, Ltd. in Hiroshima Works (72) Inventor Akio Kuroda 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd. in Hiroshima Works (56) Reference JP-A-10-128410 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21B 39/14 B21B 15/00 B21B 1/26

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 熱間圧延ライン上で粗圧延機と仕上圧延
機との間に配設され、粗圧延後の鋼片の先行材後端部と
後行材先端部を切断する切断機と、切断後の前記後端部
と前記先端部を加熱・圧接する接合機とからなる鋼片の
接合装置において、鋼片を両側から挟持してセンタリン
グするサイドガイドを、切断機入側５ｍを超えない近接
箇所と切断機入側５ｍを超え30ｍを超えない遠隔箇所に
少なくとも各一対、切断機出側５ｍを超えない近接箇所
と接合機入側５ｍを超えない近接箇所に少なくとも各一
対、接合機出側５ｍを超えない近接箇所と接合機出側５
ｍを超え30ｍを超えない遠隔箇所に少なくとも各一対
の、少なくとも計六対備えたことを特徴とする鋼片の接
合装置。1. A cutting machine disposed on a hot rolling line between a rough rolling machine and a finishing rolling machine, for cutting the trailing end and the leading end of a preceding material of a steel slab after rough rolling. In a steel slab joining device including a joining machine for heating and press-contacting the rear end portion and the tip end after cutting, a side guide for sandwiching and centering the steel piece from both sides exceeds a cutting machine entry side 5 m. No proximity
At least each pair of far 隔箇 plants not exceeding 30m beyond the point the cutter entry side 5m, at least each of the adjacent locations cutter exit side 5m not exceed proximity portion <br/> does not exceed the bonding machine entry side 5m A pair, a proximity part not exceeding 5 m on the joining machine outlet side and a joining machine outlet side 5
at least each pair of far 隔箇 plants not exceeding 30m exceed m, the bonding apparatus of the steel strip, characterized in that it comprises at least a total of six pairs. 【請求項２】 粗圧延後の鋼片の先行材後端部と後行材
先端部を請求項１記載の接合装置により切断・加熱・圧
接する際に前記サイドガイドを用いて鋼片を両側から挟
持してセンタリングするにあたり、先行材・後行材をそ
れぞれ後端部・先端部付近を含む長手方向の少なくとも
二箇所で挟持することを特徴とする鋼片の接合方法。2. The steel strip after rough rolling is subjected to cutting, heating and pressure welding of the trailing end portion and the leading end portion of the trailing material of the billet by the joining device according to claim 1 by using the side guides. A method of joining steel pieces, characterized in that, when sandwiching and centering from above, the preceding material and the following material are respectively sandwiched at at least two positions in the longitudinal direction including the vicinity of the rear end portion and the front end portion.