JPH09216007A - Press mechanism of hot steel joining machine - Google Patents
Press mechanism of hot steel joining machineInfo
- Publication number
- JPH09216007A JPH09216007A JP2031496A JP2031496A JPH09216007A JP H09216007 A JPH09216007 A JP H09216007A JP 2031496 A JP2031496 A JP 2031496A JP 2031496 A JP2031496 A JP 2031496A JP H09216007 A JPH09216007 A JP H09216007A
- Authority
- JP
- Japan
- Prior art keywords
- steel material
- joining
- press
- rolling
- die
- 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
Landscapes
- Metal Rolling (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は熱間鋼材接合機のプ
レス機構の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a pressing mechanism of a hot steel joining machine.
【０００２】[0002]
【従来の技術】従来の熱間圧延において、スラブを一枚
ずつ粗圧延機並びに仕上圧延機に供給して、間欠的に圧
延を行なっていた。このような間欠圧延では、それ自体
が非能率的なだけでなく特に被圧延材の板厚が薄い圧延
の場合には、被圧延材の先端部が変形してガイドロール
に突っかかる虞れ、また、後端部が圧延機を抜けるとき
に絞り込まれて圧延ロールを傷める虞れがある。これら
の不都合が発生すると、損傷箇所を修理するために圧延
ラインを止めなければならない。そこで、従来は、先・
後端部の圧延速度を遅くするという対策を講じている
が、これでは圧延能率が低下する。2. Description of the Related Art In conventional hot rolling, slabs are supplied one by one to a rough rolling machine and a finishing rolling machine to perform rolling intermittently. In such intermittent rolling, not only inefficiency itself, but especially in the case of rolling in which the plate thickness of the material to be rolled is thin, there is a risk that the tip end portion of the material to be rolled may be deformed and hit the guide roll. However, there is a risk that the trailing end may be narrowed when it exits the rolling mill and damage the rolling roll. When these inconveniences occur, the rolling line must be stopped to repair the damage. Therefore, conventionally,
Although measures are taken to reduce the rolling speed at the trailing edge, this reduces rolling efficiency.
【０００３】また、熱延鋼板の先・後端部は、中央部に
比べて圧延速度のバランスが崩れ、従って、適正な圧延
温度範囲から外れるため、寸法外れが発生し易い。これ
は、熱延鋼板の先端が巻取り機に巻取られるまではテー
ブルローラ上を低速の無張力で通板し、巻取り開始直後
に急激な張力が作用して板幅が狭くなる。その後、一定
速度・一定張力で巻取られる。さらに、鋼板が圧延機を
抜けた後、低速にして無張力で巻取られるためである。
このように、仕上圧延後の鋼板の先・後端部は、圧延速
度、張力の影響によって板幅及び鋼材の冷却が変動し、
寸法が外れたり温度が外れ、その部分を切り捨て及び格
落として処理しなければならず、生産歩留りの低下が大
きくなる。Further, the front and rear ends of the hot-rolled steel sheet are out of balance with respect to the rolling speed as compared with the central portion, and therefore are out of the proper rolling temperature range, so that the dimension is likely to be out of order. This is because the tip of the hot-rolled steel sheet is passed through the table roller at low speed without tension until it is wound up by the winder, and a sharp tension acts immediately after the start of winding to narrow the width of the sheet. After that, it is wound at a constant speed and a constant tension. Furthermore, after the steel sheet has passed through the rolling mill, it is wound at low speed and without tension.
In this way, at the front and rear ends of the steel sheet after finish rolling, the strip width and the cooling of the steel material change due to the influence of the rolling speed and tension,
If the size is out of order or the temperature is out of the range, the part must be cut off and treated as a downgrade, resulting in a large decrease in production yield.
【０００４】上記のような問題を解決するために、近
年、粗圧延機と仕上圧延機の間で、先行する粗圧延済み
鋼板（以下「先行鋼材」という）と、後続する粗圧延済
み鋼板（以下「後行鋼材」という）とを互いに接合し、
仕上圧延を連続して実施すると云う技術が提案され、実
用に供されつつある。このときに重要なことは、先・後
鋼材の接合技術であり、圧延の際にデスケーリング装置
でスケールを除去するが、接合場所に至る間に新たにス
ケールが生成し、このスケールが接合の妨げになる。そ
こで、接合の直前にこの新スケールを除去しつつ接合面
を形成し、プレス機構で圧接する。この種の技術の一例
を次に示す。In order to solve the above problems, in recent years, between a rough rolling mill and a finish rolling mill, a preceding rough rolled steel sheet (hereinafter referred to as "preceding steel material") and a following rough rolled steel sheet ( (Hereinafter referred to as "following steel material") and
A technique of continuously performing finish rolling has been proposed and is being put to practical use. At this time, what is important is the joining technology of the front and rear steel materials, and the scale is removed by the descaling device during rolling, but new scale is generated before reaching the joining place, and this scale Interfere. Therefore, just before the joining, the joining surface is formed while removing the new scale, and pressure welding is performed by the pressing mechanism. An example of this type of technology is shown below.
【０００５】図１２は従来の熱間鋼材の接合方法説明図
であり、先行鋼材１０１をロール１０２で一定距離持上
げ、この先行鋼材１０１の後端下方に後行鋼材１０３を
臨ませ、バーナ１０４で発生した還元性ガス中で、ロー
タリカッタ１０５にて、先行鋼材１０１の後端１０１ａ
下面及び後行鋼材１０３の先端１０３ａ上面を斜めにカ
ットして接合面を形成し、パンチ１０７ａ，ダイ１０７
ｂにて先行鋼材１０１の後端と後行鋼材１０３の先端と
を圧接すると云うものである。FIG. 12 is an explanatory view of a conventional hot steel joining method, in which a preceding steel material 101 is lifted by a roll 102 for a certain distance, a trailing steel material 103 is made to face below the rear end of the preceding steel material 101, and a burner 104 is used. In the reducing gas generated, the rear cutter 101a of the preceding steel material 101 is moved by the rotary cutter 105.
The lower surface and the top surface 103a of the trailing steel material 103 are obliquely cut to form a joint surface, and the punch 107a and the die 107 are formed.
In b, the rear end of the preceding steel material 101 and the front end of the following steel material 103 are pressed together.
【０００６】図１３（ａ），（ｂ）は従来の圧接工程説
明図であり、（ａ）はプレス開始時の先・後行鋼材の断
面を示し、（ｂ）はプレス完了時の先・後行鋼材の断面
を示す。（ａ）にて、先行鋼材１０１の後端と後行鋼材
１０３の先端とを初期重ね代Ｌ１だけ重ね、幅Ｌ０のパ
ンチ１０７ａ及びダイ１０７ｂにて圧接を開始する。
（ｂ）は、先行鋼材１０１と後行鋼材１０３とが同レベ
ルになるまで圧接した状態を示し、接合部の幅はＬ２に
増大する。FIGS. 13 (a) and 13 (b) are explanatory views of the conventional pressure welding process. FIG. 13 (a) shows a cross section of the leading and trailing steel materials at the start of pressing, and FIG. A cross section of the trailing steel material is shown. In (a), the trailing edge of the preceding steel material 101 and the leading edge of the following steel material 103 are overlapped by the initial overlap margin L1, and press contact is started by the punch 107a and the die 107b having the width L0.
(B) shows a state in which the preceding steel material 101 and the following steel material 103 are pressed against each other until they reach the same level, and the width of the joint increases to L2.
【０００７】[0007]
【発明が解決しようとする課題】図１３から明らかな如
く、接合面を含む幅Ｌ０を、パンチ１０７ａで強圧する
必要があり、そのための数百トン級プレス機が必要とな
る。後述の走間接合機（図２参照）に、プレス機構を組
込むことから、このプレス機構のプレス力が大きいと、
走間接合機は大型になる。走間接合機は文字通り、走行
台車に各種の機構を搭載したものであるから、プレス機
構が大きいことは好ましいことではない。As is apparent from FIG. 13, it is necessary to strongly press the width L0 including the bonding surface with the punch 107a, and a press machine of several hundred tons class is required for that purpose. Since the press mechanism is incorporated in the running joint machine (see FIG. 2) described later, if the pressing force of this press mechanism is large,
The running joint machine becomes large. Since the running joint machine is literally a traveling carriage equipped with various mechanisms, it is not preferable that the pressing mechanism is large.
【０００８】[0008]
【課題を解決するための手段】本発明者等は、走間接合
機の小型化を図る研究を進めるなかで、仕上圧延機の特
性を巧みに利用することにより、走間接合機での接合作
用を軽減することに成功した。具体的には、請求項１
は、先行鋼材の端部と後行鋼材の端部とを還元性又は無
酸化雰囲気下で脱スケールをし、重ね合わせて接合する
プレス機構において、プレス機構の押圧面に、先行鋼材
・後行鋼材同士の接合面積より小面積で且つ接合面の端
部を押圧する突起部を備えたことを特徴とする。[Means for Solving the Problems] The inventors of the present invention, while advancing research to reduce the size of a running joint machine, make good use of the characteristics of a finish rolling machine to join the joints in the running joint machine. Succeeded in reducing the effect. Specifically, claim 1
Is the descaling of the edge of the preceding steel material and the edge of the following steel material in a reducing or non-oxidizing atmosphere, and in the press mechanism that overlaps and joins, the pressing surface of the press mechanism is It is characterized in that it is provided with a projecting portion having a smaller area than the joining area of steel materials and pressing the end portion of the joining surface.
【０００９】タンデム仕上圧延機では、第１段圧延機と
第２圧延機との間の張力をそれ程大きくする必要はな
い。その理由を詳しく述べる。In the tandem finish rolling mill, it is not necessary to increase the tension between the first rolling mill and the second rolling mill so much. The reason will be described in detail.
【００１０】図１４は初期重ね代と接合面圧の関係を示
すグラフ（実験値）であり、横軸は初期重ね代、縦軸は
接合面圧であり、パラメータは圧下率である。初期重ね
代を同一にして、圧下率ｒを変えると、圧下率ｒが大き
いほど接合面圧が大きくなることが分かる。図１５は接
合面圧と接合強度の関係を示すグラフ（実験値）であ
り、横軸は接合面圧、縦軸は接合強度である。接合面圧
が大きいほど、接合強度は大きくなる。FIG. 14 is a graph (experimental value) showing the relationship between the initial lap margin and the joint surface pressure. The horizontal axis represents the initial lap margin, the vertical axis represents the joint surface pressure, and the parameter is the rolling reduction. It can be seen that when the reduction ratio r is changed with the initial overlap margin being the same, the joint surface pressure increases as the reduction ratio r increases. FIG. 15 is a graph (experimental value) showing the relationship between the bonding surface pressure and the bonding strength, where the horizontal axis represents the bonding surface pressure and the vertical axis represents the bonding strength. The greater the joint surface pressure, the greater the joint strength.
【００１１】圧延では、圧延機で圧下される毎に圧下率
が大きくなる上に、接合部が延ばされて接合面積も増
え、相乗的に接合強度が高まり、対破断性が増す。そこ
で、第１段圧延機に噛み込んで破断しない程度に弱めた
接合強度を、走間接合機で付与すればよいことになる。[0011] In rolling, the rolling ratio increases each time it is rolled by a rolling mill, the joint portion is extended and the joint area increases, and the joint strength increases synergistically and the fracture resistance increases. Therefore, it is only necessary to impart the joining strength weakened to the extent that it is not broken by being caught in the first-stage rolling mill by the running joint machine.
【００１２】接合面を、局部的に圧接するだけであるか
ら、所要プレス力が大幅に減り、プレス機構の能力を大
幅に下げることができる。その結果、プレス機構の小型
化と、走間接合機の軽量化並びに小型化とが図れる。Since the joining surfaces are only locally pressed, the required pressing force is greatly reduced and the ability of the pressing mechanism can be greatly reduced. As a result, the press mechanism can be downsized, and the running joint machine can be reduced in weight and size.
【００１３】請求項２は、突起部を帯状突起としたこと
を特徴とする。請求項１の作用に加えて、プレス機構の
パンチ、ダイの形状が単純であるから、設備費の高騰を
抑えることができる。According to a second aspect of the present invention, the protrusion is a band-shaped protrusion. In addition to the effect of the first aspect, since the punch and die of the pressing mechanism are simple in shape, it is possible to suppress an increase in equipment cost.
【００１４】請求項３は、突起部を角柱若しくは円柱を
所定ピッチで一列に配置したものであることを特徴とす
る。角柱若しくは円柱で母材を押圧するだけで局部プレ
スが可能となり、所要プレス力が大幅に減り、プレス機
構の能力を大幅に下げることができる。According to a third aspect of the present invention, the projections are formed by arranging prisms or cylinders in a line at a predetermined pitch. Local pressing is possible by simply pressing the base material with a prism or cylinder, the required pressing force is greatly reduced, and the ability of the pressing mechanism can be greatly reduced.
【００１５】[0015]
【発明の実施の形態】本発明の実施の形態を添付図に基
づいて以下に説明する。なお、図面は符号の向きに見る
ものとする。図１は本発明に係る熱間圧延ラインのレイ
アウト図であり、熱間圧延ラインは、粗圧延機１、圧延
材を巻取って保温しつつ巻戻すコイルボックス２、レベ
ラ３、圧延材をクロス方向に切断するクロップシャー
４、本発明に係る走間接合機１０、仕上圧延機６、高速
シャー７、巻取り機８をこの順に配列してなる。Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a layout diagram of a hot rolling line according to the present invention. The hot rolling line includes a rough rolling mill 1, a coil box 2 that winds a rolled material and rewinds it while keeping it warm, a leveler 3, and a rolled material. A crop shear 4, which cuts in the direction, a running joining machine 10 according to the present invention, a finish rolling machine 6, a high speed shear 7, and a winding machine 8 are arranged in this order.
【００１６】粗圧延機１でスラブ９から圧延した鋼材は
コイルボックス２に巻取られたのちに巻き戻されて、レ
ベラ３で先後端部の巻き癖を直す。接合する面を確保す
るために鋼材の先後端をクロップシャー４で切断する。
その後、走間接合機１０で先行鋼材の後端と後行鋼材の
先端とを接合し、仕上圧延機６にて仕上圧延をしたのち
巻取り機８で巻き取り、巻取り量が一定量に達したら高
速シャー７で切断して熱延コイルにする。The steel material rolled from the slab 9 by the rough rolling mill 1 is wound on the coil box 2 and then rewound, and the leveler 3 corrects the winding tendency of the front and rear ends. The front and rear ends of the steel material are cut by the crop shear 4 in order to secure the surfaces to be joined.
Then, the running steel joining machine 10 joins the trailing end of the preceding steel material and the leading end of the following steel material, finish rolling is performed by the finishing rolling machine 6, and then the winding is performed by the winding machine 8 so that the winding amount becomes constant. When it reaches, it is cut with a high speed shear 7 to form a hot rolled coil.
【００１７】図２は本発明に係る走間接合機の側面図で
あり、走間接合機の一例を示す。走間接合機１０は走行
台車１１と、プレスのためのプレスシリンダ１２，パン
チ１３及びダイ１４と、このダイ１４の出側（図右側）
に配置した第１クランパ１５、ピンチロール１６、ロー
ル１７，１７及びバーナ２１と、これらを一括して上下
動させるための昇降フレーム１８及び昇降シリンダ１
９，１９と、ダイ１４の入側に配置した第２クランパ２
２、ピンチロール２３及びロール２４，２４と、バーナ
２５と、ロータリカッタ２６からなる。２７は第１クラ
ンパ作動シリンダ、２８は第２クランパ作動シリンダで
ある。FIG. 2 is a side view of the running joint machine according to the present invention, showing an example of the running joint machine. The running joint machine 10 includes a traveling carriage 11, a press cylinder 12 for pressing, a punch 13 and a die 14, and an exit side of the die 14 (on the right side in the drawing).
The first clamper 15, the pinch rolls 16, the rolls 17 and 17 and the burner 21, which are arranged in a vertical direction, and the lifting frame 18 and the lifting cylinder 1 for collectively moving them up and down.
9, 19 and the second clamper 2 arranged on the entrance side of the die 14.
2, a pinch roll 23, rolls 24 and 24, a burner 25, and a rotary cutter 26. Reference numeral 27 is a first clamper working cylinder, and 28 is a second clamper working cylinder.
【００１８】以上の構成からなる走間接合機１０の作用
を次に述べる。図３（ａ），（ｂ）〜図５（ａ），
（ｂ）は走間接合機の作用説明図である。図３（ａ）に
おいて、先行鋼材３１が所定位置に達したら、第１クラ
ンパ作動シリンダ２７を作動して、第１クランパ１５を
下げ、この第１クランパ１５で先行鋼材３１を固定す
る。図３（ｂ）において、矢印の如く昇降シリンダ１
９，１９を作動して、第１クランパ１５などを所定高さ
持上げる。次に、矢印の如く後行鋼材３２の先端を所
定位置まで進め、第２クランパ２２で固定する。図４
（ａ）において、バーナ２１，２５を作動して還元性火
炎で先行鋼材３１の後端及び後行鋼材３２の先端を包
む。図４（ｂ）において、図時計方向に回動したロータ
リカッタ２６を、矢印の如く平行四辺形を描くように
移動して、後行鋼材３２の先端及び先行鋼材３１の後端
を斜めにカットする。この工程は後に詳しく説明する。The operation of the running joint machine 10 having the above structure will be described below. 3 (a), (b) to FIG. 5 (a),
(B) is an operation explanatory view of the running joint machine. In FIG. 3A, when the preceding steel material 31 reaches a predetermined position, the first clamper operating cylinder 27 is operated to lower the first clamper 15, and the first clamper 15 fixes the preceding steel material 31. In FIG. 3B, the lifting cylinder 1 is indicated by the arrow.
9 and 19 are operated to lift the first clamper 15 and the like to a predetermined height. Next, as shown by the arrow, the tip of the trailing steel material 32 is advanced to a predetermined position and fixed by the second clamper 22. FIG.
In (a), the burners 21 and 25 are operated to wrap the trailing end of the preceding steel material 31 and the leading end of the following steel material 32 with reducing flame. In FIG. 4 (b), the rotary cutter 26 rotated clockwise in the drawing is moved so as to draw a parallelogram as shown by the arrow, and the tip of the trailing steel 32 and the trailing end of the preceding steel 31 are cut diagonally. To do. This step will be described in detail later.
【００１９】図５（ａ）において、矢印の如く先行鋼
材３１を下げて、その後端を後行鋼材３２の先端に重ね
る。つづいて矢印の如くパンチ１３を下降して、先・
後行鋼材３１，３２同士を圧接する。なお、矢印と矢
印とを同時に実行して、先・後行鋼材３１，３２同士
を圧接しても良い。図５（ｂ）において、パンチ１３並
びに第１・第２クランパ１５，２２を開放して、繋がっ
た状態の先・後行鋼材３１，３２を前進させる。３３は
接合部である。以上の工程は、走行台車１１を適宜走行
させながら実施する。先行鋼材３１及び後行鋼材３２を
停止する必要がないので、圧延作業が継続できる。In FIG. 5 (a), the preceding steel material 31 is lowered as shown by the arrow, and the rear end thereof is superposed on the leading end of the following steel material 32. Then lower the punch 13 as shown by the arrow,
The trailing steel members 31 and 32 are pressed against each other. The arrow and the arrow may be executed at the same time to press the leading and trailing steel materials 31 and 32 into pressure contact with each other. In FIG. 5B, the punch 13 and the first and second clampers 15 and 22 are opened to advance the connected leading and trailing steel materials 31 and 32. 33 is a joint. The above steps are carried out while the traveling carriage 11 is traveling appropriately. Since it is not necessary to stop the preceding steel material 31 and the following steel material 32, the rolling operation can be continued.
【００２０】図６は本発明に係るプレス機構のダイの斜
視図（第１実施例）であり、ダイ１４は、平坦面１４ａ
の端部（鋼材の流れ方向における端部）に矩形断面の帯
状突起部１４ｂを備えたことを特徴とする。パンチ１３
も同様である。FIG. 6 is a perspective view of the die of the press mechanism according to the present invention (first embodiment). The die 14 has a flat surface 14a.
Is provided with a strip-shaped protrusion 14b having a rectangular cross section at the end (end in the flow direction of the steel material). Punch 13
The same is true for
【００２１】以上の構成のプレス機構の作用を次に述べ
る。図７（ａ），（ｂ）は第１実施例の第１作用説明図
であり、（ａ）は圧接前、（ｂ）は圧接後の状態を示
す。（ａ）において、先行鋼材３１の後端下面の接合面
３０と、後行鋼材３２の先端上面の接合面３０とを重
ね、パンチ１３の帯状突起部１３ｂとダイ１４の帯状突
起部１４ｂとをセットする。詳しくは、帯状突起部１３
ｂ，１４ｂは接合部３０の図の左・右端部を各々臨む。
この状態からパンチ１３を下げる。（ｂ）は圧接後の接
合面の状態を示し、接合面３０の端部３０ａ，３０ｂは
良好に圧接されたが、中央部３０ｃは未圧接部である。
従来と比較して圧接面積が小さいので、その分だけプレ
ス力は小さくなる。The operation of the press mechanism having the above structure will be described below. 7A and 7B are explanatory views of the first operation of the first embodiment, where FIG. 7A shows a state before pressure welding and FIG. 7B shows a state after pressure welding. In (a), the joining surface 30 on the lower surface of the trailing end of the preceding steel material 31 and the joining surface 30 on the upper surface of the leading end of the trailing steel material 32 are overlapped, and the strip-shaped protrusion 13b of the punch 13 and the strip-shaped protrusion 14b of the die 14 are separated. set. Specifically, the strip-shaped protrusion 13
b and 14b respectively face the left and right ends of the joining portion 30 in the drawing.
From this state, the punch 13 is lowered. (B) shows the state of the joint surface after the pressure contact, and although the ends 30a and 30b of the joint surface 30 are pressed well, the central portion 30c is an unpressed portion.
Since the press contact area is smaller than in the conventional case, the pressing force is correspondingly reduced.
【００２２】図８（ａ），（ｂ）は第１実施例の第２作
用説明図であり、（ａ）は圧接前、（ｂ）は圧接後の状
態を示す。（ａ）において、斜めにカッタして形成した
先行鋼材３１の接合面３０と、斜めにカッタして形成し
た後行鋼材３２の接合面３０とを重ね、パンチ１３の帯
状突起部１３ｂとダイ１４の帯状突起部１４ｂとをセッ
トする。詳しくは、帯状突起部１３ｂ，１４ｂは接合部
３０の図の左・右端部を各々臨む。この状態からパンチ
１３を下げる。（ｂ）は圧接後の接合面の状態を示し、
接合面３０の端部３０ａ，３０ｂは良好に圧接された
が、中央部３０ｃは未圧接部である。従来と比較して圧
接面積が小さいので、その分だけプレス力は小さくな
る。FIGS. 8 (a) and 8 (b) are views for explaining the second operation of the first embodiment, where FIG. 8 (a) shows the state before pressure welding and FIG. 8 (b) shows the state after pressure welding. In (a), the joining surface 30 of the preceding steel material 31 formed by diagonally cutting and the joining surface 30 of the trailing steel material 32 formed by diagonally cutting are overlapped, and the strip-shaped protrusion 13 b of the punch 13 and the die 14 are overlapped. And the band-shaped protrusion 14b of Specifically, the strip-shaped protrusions 13b and 14b face the left and right ends of the joining portion 30 in the drawing, respectively. From this state, the punch 13 is lowered. (B) shows the state of the joint surface after pressure welding,
The ends 30a and 30b of the joint surface 30 were pressed well, but the central portion 30c was an unpressed portion. Since the press contact area is smaller than in the conventional case, the pressing force is correspondingly reduced.
【００２３】図９（ａ），（ｂ）は第１実施例の第３作
用説明図であり、（ａ）は圧接前、（ｂ）は圧接後の状
態を示す。（ａ）において、斜めにカッタして形成した
先行鋼材３１の接合面３０と、斜めにカッタして形成し
た後行鋼材３２の接合面３０とを重ね、パンチ１３の帯
状突起部１３ｂとダイ１４の帯状突起部１４ｂとをセッ
トする。詳しくは、帯状突起部１３ｂ，１４ｂは接合部
３０の図の左・右端部を各々臨む。この状態からパンチ
１３を下げる。（ｂ）は圧接後の接合面の状態を示し、
接合面３０の端部３０ａ，３０ｂは良好に圧接された
が、中央部３０ｃは未圧接部である。従来と比較して圧
接面積が小さいので、その分だけプレス力は小さくな
る。FIGS. 9 (a) and 9 (b) are views for explaining the third operation of the first embodiment. FIG. 9 (a) shows the state before pressure welding and FIG. 9 (b) shows the state after pressure welding. In (a), the joining surface 30 of the preceding steel material 31 formed by diagonally cutting and the joining surface 30 of the trailing steel material 32 formed by diagonally cutting are overlapped, and the strip-shaped protrusion 13 b of the punch 13 and the die 14 are stacked. And the band-shaped protrusion 14b of Specifically, the strip-shaped protrusions 13b and 14b face the left and right ends of the joining portion 30 in the drawing, respectively. From this state, the punch 13 is lowered. (B) shows the state of the joint surface after pressure welding,
The ends 30a and 30b of the joint surface 30 were pressed well, but the central portion 30c was an unpressed portion. Since the press contact area is smaller than in the conventional case, the pressing force is correspondingly reduced.
【００２４】図１０は本発明に係るプレス機構のダイの
斜視図（第２実施例）であり、ダイ１４Ｂは、平坦面１
４ａの端部（鋼材の流れ方向における端部）に角柱を所
定ピッチで且つ一列に並べた角柱断続突起部１４ｃを備
えたことを特徴とする。パンチ１３も同様である。な
お、角柱は角錐台であってもよい。FIG. 10 is a perspective view (second embodiment) of the die of the press mechanism according to the present invention, in which the die 14B has a flat surface 1.
It is characterized in that the end portion of 4a (end portion in the flow direction of the steel material) is provided with prismatic intermittent projections 14c in which prisms are arranged in a row at a predetermined pitch. The punch 13 is also the same. The prism may be a truncated pyramid.
【００２５】図１１は本発明に係るプレス機構のダイの
斜視図（第３実施例）であり、ダイ１４Ｄは、平坦面１
４ａの端部（鋼材の流れ方向における端部）に円柱を所
定ピッチで且つ一列に並べた円柱断続突起部１４ｄを備
えたことを特徴とする。パンチ１３も同様である。な
お、円柱は円錐台であってもよい。FIG. 11 is a perspective view of the die of the pressing mechanism according to the present invention (third embodiment), in which the die 14D is a flat surface 1.
4a is provided with a columnar intermittent protrusion 14d in which columns are arranged in a line at a predetermined pitch at the end (the end in the flow direction of the steel material). The punch 13 is also the same. The column may be a truncated cone.
【００２６】なお、前記バーナ２１，２５で還元性火炎
を先行鋼材３１の後端及び後行鋼材３２の先端に吹き付
けたのは、先行鋼材３１の後端及び後行鋼材３２の先端
の再酸化防止と温度低下防止を図るものである。従っ
て、熱した窒素ガスなどの不活性ガスを切削の間吹き付
けるものであってもよい。In the burners 21 and 25, the reducing flame was sprayed on the trailing end of the preceding steel material 31 and the leading end of the trailing steel material 32 because the reoxidation of the trailing end of the leading steel material 31 and the leading end of the trailing steel material 32. It is intended to prevent the temperature drop. Therefore, a heated inert gas such as nitrogen gas may be blown during cutting.
【００２７】[0027]
【実施例】以下に、本発明の実施例を説明する。しか
し、本発明は実施例に限るものではない。 実施例１〜実施例９； （１）供試材； 炭素鋼板（Ｃ：０．１％、Ｓｉ：０．５％、Ｍｎ：１．
２％） 板厚３０ｍｍ、板幅３００ｍｍ、長さ１，０００ｍｍ 温度１，２５０℃Embodiments of the present invention will be described below. However, the present invention is not limited to the embodiment. Examples 1 to 9; (1) Test material; Carbon steel plate (C: 0.1%, Si: 0.5%, Mn: 1.
2%) Plate thickness 30 mm, plate width 300 mm, length 1,000 mm Temperature 1,250 ° C
【００２８】（２）直火還元炎条件； バーナの形式；ノズル内混合方式 燃料；ＬＰＧ ６Ｎｍ3／ｈｒ／１バーナ 酸素富加率；６０％ 空気比ｍ；０．６ バーナ配列；鋼材の幅方向に複数本配列。 なお、バーナはリング状スリットノズルから混合気を吹
き出して還元炎を発生するものである。(2) Direct flame reducing flame condition; Burner type; Mixing method in nozzle Fuel: LPG 6Nm 3 / hr / 1 burner Oxygen enrichment rate; 60% Air ratio m; 0.6 burner arrangement; Steel width direction Multiple arrays in. The burner blows the air-fuel mixture from a ring-shaped slit nozzle to generate a reducing flame.
【００２９】（３）切削条件； カッタの種類；円筒ロータリカッタ（最大外径３００ｍ
ｍ） チップの配列；千鳥配置 回転数；１，５００ｒｐｍ 送り速度；６，０００ｍｍ／ｍｉｎ 切削面の幅；３０ｍｍ なお、切削はバーナ点火１秒後に開始した。(3) Cutting conditions; type of cutter; cylindrical rotary cutter (maximum outer diameter 300 m
m) Chip arrangement; zigzag arrangement Rotation speed; 1,500 rpm Feed rate; 6,000 mm / min Cutting surface width; 30 mm In addition, cutting was started 1 second after burner ignition.
【００３０】（４）圧接条件； 圧接温度；１，０５０℃ 重ね合せ量（幅）；２５ｍｍ 使用プレス機構；３００トンプレス 雰囲気；還元炎噴射 なお、切削を終えて切削装置を退避させた後、１秒後に
圧接を開始した。(4) Pressure welding condition; pressure welding temperature; 1,050 ° C. overlapping amount (width); 25 mm press mechanism used; 300 ton press atmosphere; reducing flame injection After finishing cutting and evacuating the cutting device, Pressing was started after 1 second.
【００３１】（５）仕上圧延条件； 圧延機数；３段（４０％，３５％，３０％の圧下率） 張力：第１段〜第２段間 約２．０ｋｇｆ／ｍｍ2 張力：第２段〜第３段間 約４．０ｋｇｆ／ｍｍ2 鋼材温度；１，０００℃ 仕上り厚さ；８．２ｍｍ(5) Finish rolling conditions: Number of rolling mills: 3 stages (40%, 35%, 30% reduction ratio) Tension: 1st to 2nd stage Approx. 2.0 kgf / mm 2 Tension: 2nd Stage-third stage About 4.0 kgf / mm 2 Steel material temperature; 1,000 ° C Finished thickness; 8.2 mm
【００３２】[0032]
【表１】 [Table 1]
【００３３】実施例１；プレス機構に図６に示す帯状突
起部（幅８ｍｍ、高さ２０ｍｍ）を備えたダイ及びプレ
スを使用し、重ね合せ形状を図７に示す単純重ねとし
て、１７５トンで接合したところ、以降の圧延での破断
が無く、評価は○である。 実施例２；プレス機構に図１０に示す角柱断続突起部
（角柱の幅８ｍｍ、高さ２０ｍｍ、長さ２０ｍｍ、ピッ
チ２０ｍｍ）を備えたダイ及びプレスを使用し、重ね合
せ形状を図７に示す単純重ねとして、１００トンで接合
したところ、以降の圧延での破断が無く、評価は○であ
る。Example 1 A die and a press having a band-shaped projection (width 8 mm, height 20 mm) shown in FIG. 6 were used in a press mechanism, and the stacking shape was a simple stack shown in FIG. After joining, there was no breakage in the subsequent rolling, and the evaluation was ◯. Example 2; A die and a press having a prismatic intermittent projection (square prism width 8 mm, height 20 mm, length 20 mm, pitch 20 mm) shown in FIG. 10 were used for a press mechanism, and a superposed shape is shown in FIG. When they were joined by 100 tons as a simple stack, there was no breakage in the subsequent rolling and the evaluation was ◯.
【００３４】実施例３；プレス機構に図１１に示す円柱
断続突起部（円柱の直径８ｍｍ、高さ２０ｍｍ、ピッチ
２０ｍｍ）を備えたダイ及びプレスを使用し、重ね合せ
形状を図７に示す単純重ねとして、９０トンで接合した
ところ、以降の圧延での破断が無く、評価は○である。 比較例１；プレス機構に図１３に示す平坦なダイ及びプ
レスを使用し、重ね合せ形状を図７に示す単純重ねとし
て、２５０トンで接合した。以降の圧延での破断は無か
ったが、プレス力が大きいので評価は△とした。EXAMPLE 3 A die and a press having a columnar intermittent projection (cylinder diameter 8 mm, height 20 mm, pitch 20 mm) shown in FIG. 11 was used for the press mechanism, and the overlapping shape was as shown in FIG. When they were joined together at 90 tons as a stack, there was no breakage in the subsequent rolling and the evaluation was ◯. Comparative Example 1 The flat die and press shown in FIG. 13 were used for the press mechanism, and the overlapping shape was a simple overlap shown in FIG. Although there was no breakage in the subsequent rolling, since the pressing force was large, the evaluation was Δ.
【００３５】[0035]
【表２】 [Table 2]
【００３６】実施例４；プレス機構に図６に示す帯状突
起部（幅８ｍｍ、高さ１５ｍｍ）を備えたダイ及びプレ
スを使用し、重ね合せ形状を図８に示す斜めにカットし
た接合面同士を重ねて、１７０トンで接合したところ、
以降の圧延での破断が無く、評価は○である。 実施例５；プレス機構に図１０に示す角柱断続突起部
（角柱の幅８ｍｍ、高さ２０ｍｍ、長さ２０ｍｍ、ピッ
チ２０ｍｍ）を備えたダイ及びプレスを使用し、重ね合
せ形状を図８に示す斜めにカットした接合面同士を重ね
て、９５トンで接合したところ、以降の圧延での破断が
無く、評価は○である。EXAMPLE 4 A die and a press having a band-like projection (width 8 mm, height 15 mm) shown in FIG. 6 were used in a press mechanism, and the joining surfaces of the overlapping shape shown in FIG. When they were stacked and joined at 170 tons,
There is no breakage in the subsequent rolling and the evaluation is ◯. Example 5: A die and a press having a prismatic intermittent projection (square prism width 8 mm, height 20 mm, length 20 mm, pitch 20 mm) shown in FIG. 10 were used for a press mechanism, and the overlapping shape is shown in FIG. When the obliquely cut joining surfaces were overlapped and joined at 95 tons, there was no breakage in subsequent rolling, and the evaluation was ◯.
【００３７】実施例６；プレス機構に図１１に示す円柱
断続突起部（円柱の直径８ｍｍ、高さ２０ｍｍ、ピッチ
２０ｍｍ）を備えたダイ及びプレスを使用し、重ね合せ
形状を図８に示す斜めにカットした接合面同士を重ね
て、８５トンで接合したところ、以降の圧延での破断が
無く、評価は○である。 比較例２；プレス機構に図１３に示す平坦なダイ及びプ
レスを使用し、重ね合せ形状を図８に示す斜めにカット
した接合面同士を重ねて、２４０トンで接合した。以降
の圧延での破断は無かったが、プレス力が大きいので評
価は△とした。Example 6; A die and a press having a columnar intermittent projection (column diameter 8 mm, height 20 mm, pitch 20 mm) shown in FIG. 11 was used as a pressing mechanism, and the overlapping shape was diagonal as shown in FIG. When the joint surfaces cut into pieces were overlapped and joined at 85 tons, there was no breakage in subsequent rolling, and the evaluation was ◯. Comparative Example 2; The flat die and press shown in FIG. 13 were used for the press mechanism, and the joining surfaces of which the overlapping shape was cut obliquely as shown in FIG. 8 were overlapped and joined at 240 tons. Although there was no breakage in the subsequent rolling, since the pressing force was large, the evaluation was Δ.
【００３８】[0038]
【表３】 [Table 3]
【００３９】実施例７；プレス機構に図６に示す帯状突
起部（幅８ｍｍ、高さ１０ｍｍ）を備えたダイ及びプレ
スを使用し、重ね合せ形状を図９に示す斜めにカットし
た接合面同士を重ねて、１００トンで接合したところ、
以降の圧延での破断が無く、評価は○である。 実施例８；プレス機構に図１０に示す角柱断続突起部
（角柱の幅８ｍｍ、高さ２０ｍｍ、長さ２０ｍｍ、ピッ
チ２０ｍｍ）を備えたダイ及びプレスを使用し、重ね合
せ形状を図９に示す斜めにカットした接合面同士を重ね
て、５０トンで接合したところ、以降の圧延での破断が
無く、評価は○である。Example 7: A die having a strip-shaped projection (width 8 mm, height 10 mm) shown in FIG. 6 and a press were used in a pressing mechanism, and the joining surfaces of the overlapping shape shown in FIG. 9 were cut obliquely. When they were stacked and joined with 100 tons,
There is no breakage in the subsequent rolling and the evaluation is ◯. Example 8; A die having a prismatic intermittent projection (width of prism 8 mm, height 20 mm, length 20 mm, pitch 20 mm) shown in FIG. When the diagonally cut joining surfaces were overlapped and joined at 50 tons, there was no breakage in subsequent rolling, and the evaluation was ◯.
【００４０】実施例９；プレス機構に図１１に示す円柱
断続突起部（円柱の直径８ｍｍ、高さ２０ｍｍ、ピッチ
２０ｍｍ）を備えたダイ及びプレスを使用し、重ね合せ
形状を図９に示す斜めにカットした接合面同士を重ね
て、４０トンで接合したところ、以降の圧延での破断が
無く、評価は○である。 比較例３；プレス機構に図１３に示す平坦なダイ及びプ
レスを使用し、重ね合せ形状を図９に示す斜めにカット
した接合面同士を重ねるだけとしたが、接合しなかっ
た。従って、評価は×である。Embodiment 9: A die and a press having a columnar intermittent projection (cylinder diameter 8 mm, height 20 mm, pitch 20 mm) shown in FIG. 11 was used as a pressing mechanism, and the overlapping shape was diagonal as shown in FIG. When the joint surfaces cut into pieces were overlapped and joined at 40 tons, there was no breakage in subsequent rolling, and the evaluation was ◯. Comparative Example 3; The flat die and the press shown in FIG. 13 were used for the pressing mechanism, and the joining surfaces with the overlapping shape cut obliquely as shown in FIG. 9 were simply overlaid, but they were not joined. Therefore, the evaluation is x.
【００４１】[0041]
【発明の効果】本発明は上記構成により次の効果を発揮
する。請求項１は、先行鋼材の端部と後行鋼材の端部と
を還元性又は無酸化雰囲気下で脱スケールをし、重ね合
わせて接合するプレス機構において、プレス機構の押圧
面に、先行鋼材・後行鋼材同士の接合面積より小面積で
且つ接合面の端部を押圧する突起部を備えたことを特徴
とする。接合面を、局部的に圧接するだけであるから、
所要プレス力が大幅に減り、プレス機構の能力を大幅に
下げることができる。その結果、プレス機構の小型化
と、走間接合機の軽量化並びに小型化とが図れる。The present invention has the following effects due to the above configuration. According to a first aspect of the present invention, in a press mechanism in which an end portion of a preceding steel material and an end portion of a following steel material are descaled in a reducing or non-oxidizing atmosphere and are superposed and joined, the pressing steel surface of the pressing mechanism is attached to the pressing steel surface of the preceding steel material. -It is characterized in that it is provided with a projecting portion that has a smaller area than the joining area between the following steel materials and that presses the end portion of the joining surface. Since the joint surface is only pressed locally,
The required pressing force is greatly reduced, and the ability of the pressing mechanism can be greatly reduced. As a result, the press mechanism can be downsized, and the running joint machine can be reduced in weight and size.
【００４２】請求項２は、突起部を帯状突起としたこと
を特徴とする。請求項１の作用に加えて、プレス機構の
パンチ、ダイの形状が単純であるから、設備費の高騰を
抑えることができる。According to a second aspect of the present invention, the protrusion is a band-shaped protrusion. In addition to the effect of the first aspect, since the punch and die of the pressing mechanism are simple in shape, it is possible to suppress an increase in equipment cost.
【００４３】請求項３は、突起部を角柱若しくは円柱を
所定ピッチで一列に配置したものであることを特徴とす
る。角柱若しくは円柱で母材を押圧するだけで局部プレ
スが可能となり、所要プレス力が大幅に減り、プレス機
構の能力を大幅に下げることができる。A third aspect of the invention is characterized in that the protrusions are formed by arranging prisms or cylinders in a line at a predetermined pitch. Local pressing is possible by simply pressing the base material with a prism or cylinder, the required pressing force is greatly reduced, and the ability of the pressing mechanism can be greatly reduced.
【図１】本発明に係る熱間圧延ラインのレイアウト図FIG. 1 is a layout diagram of a hot rolling line according to the present invention.
【図２】本発明に係る走間接合機の側面図FIG. 2 is a side view of the running joint machine according to the present invention.
【図３】走間接合機の作用説明図[Fig. 3] Operation explanatory diagram of the running joint machine
【図４】走間接合機の作用説明図FIG. 4 is an explanatory view of the action of the running joint machine.
【図５】走間接合機の作用説明図FIG. 5 is an explanatory view of the action of the running joint machine.
【図６】本発明に係るプレス機構のダイの斜視図（第１
実施例）FIG. 6 is a perspective view of a die of a press mechanism according to the present invention (first
Example)
【図７】第１実施例の第１作用説明図FIG. 7 is a first operation explanatory view of the first embodiment.
【図８】第１実施例の第２作用説明図FIG. 8 is a second operation explanatory view of the first embodiment.
【図９】第１実施例の第３作用説明図FIG. 9 is a third operation explanatory view of the first embodiment.
【図１０】本発明に係るプレス機構のダイの斜視図（第
２実施例）FIG. 10 is a perspective view of a die of a pressing mechanism according to the present invention (second embodiment).
【図１１】本発明に係るプレス機構のダイの斜視図（第
３実施例）FIG. 11 is a perspective view of a die of a pressing mechanism according to the present invention (third embodiment).
【図１２】従来の熱間鋼材の接合方法説明図FIG. 12 is an explanatory view of a conventional hot steel joining method.
【図１３】従来の圧接工程説明図FIG. 13 is an explanatory view of a conventional pressure welding process.
【図１４】初期重ね代と接合面圧の関係を示すグラフ
（実験値）FIG. 14 is a graph (experimental value) showing the relationship between the initial lap margin and the bonding surface pressure.
【図１５】接合面圧と接合強度の関係を示すグラフ（実
験値）FIG. 15 is a graph showing the relationship between the bonding surface pressure and the bonding strength (experimental value).
１…粗圧延機、６…仕上圧延機、１０…走間接合機、１
３…パンチ、１３ｂ…帯状突起部、１３ｃ…角柱断続突
起部、１３ｄ…円柱断続突起部、１４，１４Ｂ，１４Ｄ
…ダイ、１４ｂ…帯状突起部、１４ｃ…角柱断続突起
部、１４ｄ…円柱断続突起部、２６…ロータリカッタ、
３０…接合面、３０ｃ…未接合部、３１…先行鋼材、３
２…後行鋼材、Ｌ１…初期重ね代、Ｌ２…プレス後の接
合面長さ。1 ... Rough rolling mill, 6 ... Finishing rolling mill, 10 ... Running joining machine, 1
3 ... Punch, 13b ... Belt-shaped projection, 13c ... Square column intermittent projection, 13d ... Cylindrical intermittent projection, 14, 14B, 14D
... die, 14b ... band-shaped projection, 14c ... prismatic intermittent projection, 14d ... cylindrical intermittent projection, 26 ... rotary cutter,
30 ... Joined surface, 30c ... Unjoined portion, 31 ... Leading steel material, 3
2 ... Trailing steel material, L1 ... initial overlap margin, L2 ... joining surface length after pressing.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 森 俊博 大阪府大阪市中央区北浜４丁目５番33号 住友金属工業株式会社内 (72)発明者 岩波 紀夫 神奈川県横浜市磯子区新中原町１番地 石 川島播磨重工業株式会社横浜エンジニアリ ングセンター内 (72)発明者 田添 信広 神奈川県横浜市磯子区新中原町１番地 石 川島播磨重工業株式会社横浜エンジニアリ ングセンター内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshihiro Mori 4-53-3 Kitahama, Chuo-ku, Osaka City, Osaka Prefecture Sumitomo Metal Industries, Ltd. (72) Inventor Norio Iwanami 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Address Ishi Kawashima Harima Heavy Industries Co., Ltd. Yokohama Engineering Center (72) Inventor Nobuhiro Tazoe 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishi Kawashima Harima Heavy Industries Co., Ltd. Yokohama Engineering Center
Claims (3)
元性又は無酸化雰囲気下で脱スケールをし、重ね合わせ
て接合するプレス機構において、前記プレス機構の押圧
面は、先行鋼材・後行鋼材同士の接合面積より小面積で
且つ前記接合面の端部を押圧する突起部を備えたことを
特徴とする熱間鋼材接合機のプレス機構。1. In a press mechanism for descaling an end of a preceding steel material and an end of a following steel material in a reducing or non-oxidizing atmosphere and superposing and joining, the pressing surface of the pressing mechanism is A pressing mechanism for a hot steel material joining machine, characterized in that the area is smaller than the joining area between the steel materials and the trailing steel materials and that a projection portion for pressing the end portion of the joining surface is provided.
徴とする請求項１記載の熱間鋼材接合機のプレス機構。2. The pressing mechanism for a hot steel material joining machine according to claim 1, wherein the projection is a strip projection.
ピッチで一列に配置したものであることを特徴とする請
求項１記載の熱間鋼材接合機のプレス機構。3. The press mechanism for a hot steel material joining machine according to claim 1, wherein the protrusions are formed by arranging prisms or cylinders in a line at a predetermined pitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02031496A JP3688788B2 (en) | 1996-02-06 | 1996-02-06 | Press mechanism of hot steel joining machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02031496A JP3688788B2 (en) | 1996-02-06 | 1996-02-06 | Press mechanism of hot steel joining machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09216007A true JPH09216007A (en) | 1997-08-19 |
| JP3688788B2 JP3688788B2 (en) | 2005-08-31 |
Family
ID=12023680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02031496A Expired - Lifetime JP3688788B2 (en) | 1996-02-06 | 1996-02-06 | Press mechanism of hot steel joining machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3688788B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020012353A (en) * | 2000-08-07 | 2002-02-16 | 이구택 | device for suppling oil and preventing the jammed strip in joiner |
| CN104815907A (en) * | 2015-05-05 | 2015-08-05 | 北京科技大学 | Quick connection die and method for hot rolled strip intermediate billets |
| CN110560485A (en) * | 2019-09-04 | 2019-12-13 | 中冶赛迪工程技术股份有限公司 | Hot-rolled strip steel endless rolling intermediate billet connecting system and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6643279B2 (en) * | 2016-08-10 | 2020-02-12 | ポスコＰｏｓｃｏ | High-grade steel continuous hot rolling method |
-
1996
- 1996-02-06 JP JP02031496A patent/JP3688788B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020012353A (en) * | 2000-08-07 | 2002-02-16 | 이구택 | device for suppling oil and preventing the jammed strip in joiner |
| CN104815907A (en) * | 2015-05-05 | 2015-08-05 | 北京科技大学 | Quick connection die and method for hot rolled strip intermediate billets |
| CN104815907B (en) * | 2015-05-05 | 2017-01-25 | 北京科技大学 | Quick connection die and method for hot rolled strip intermediate billets |
| CN110560485A (en) * | 2019-09-04 | 2019-12-13 | 中冶赛迪工程技术股份有限公司 | Hot-rolled strip steel endless rolling intermediate billet connecting system and method |
| CN110560485B (en) * | 2019-09-04 | 2024-02-23 | 中冶赛迪工程技术股份有限公司 | System and method for connecting endless rolling intermediate billets of hot rolled strip steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3688788B2 (en) | 2005-08-31 |
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