EP0743108B1 - Procédé et dispositif pour le transfert de barres laminées à un refroidisseur - Google Patents

Procédé et dispositif pour le transfert de barres laminées à un refroidisseur Download PDF

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Publication number
EP0743108B1
EP0743108B1 EP95106982A EP95106982A EP0743108B1 EP 0743108 B1 EP0743108 B1 EP 0743108B1 EP 95106982 A EP95106982 A EP 95106982A EP 95106982 A EP95106982 A EP 95106982A EP 0743108 B1 EP0743108 B1 EP 0743108B1
Authority
EP
European Patent Office
Prior art keywords
rod
rollers
run
rolled rod
rolled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95106982A
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German (de)
English (en)
Other versions
EP0743108A1 (fr
Inventor
David Teng Pong
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT95106982T priority Critical patent/ATE194303T1/de
Priority to ES95106982T priority patent/ES2149905T3/es
Priority to PT95106982T priority patent/PT743108E/pt
Priority to EP95106982A priority patent/EP0743108B1/fr
Priority to DE69517798T priority patent/DE69517798T2/de
Publication of EP0743108A1 publication Critical patent/EP0743108A1/fr
Application granted granted Critical
Publication of EP0743108B1 publication Critical patent/EP0743108B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B43/00—Cooling beds, whether stationary or moving; Means specially associated with cooling beds, e.g. for braking work or for transferring it to or from the bed
    • B21B43/003—Transfer to bed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/008—Rollers for roller conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/08—Braking or tensioning arrangements

Definitions

  • the invention relates to a method and apparatus for delivering longitudinally advancing straight lengths of rolled rod to a cooling bed and particularly to a method and apparatus which avoids the production of cobbles in the rolled rod.
  • the invention relates particularly to such method and apparatus for handling longitudinally advancing straight lengths of rolled rod produced in a rolling mill at high speed.
  • patent 5,027,632 there is disclosed a method and apparatus for rolling a bar and feeding the rolled bar to a splitter without twisting the bar (the so-called NTA system).
  • the NTA system substantially increases the finishing speeds, but other problems still exist when a smaller diameter bar is fed to the cooling bed at a high speed.
  • a run-in table receives the bars at high speed and the run-in table should theoretically be as smooth as possible to avoid contact of the front end of the bar with any protruding parts causing a cobble.
  • the run-in table has to perform and a smooth uninterrupted surface is not possible.
  • a steel bar entering the run-in table of the cooling bed at a high speed would require a very long distance for the bar to slow down before it can be discharged onto the cooling bed for cooling purposes. Such long distances require much space and unnecessary expense in the construction of a building to accommodate the extra space.
  • the braking distance is proportional to the square of the finishing speed in the case of natural braking. In order to reduce this braking distance, external brakes are employed.
  • EP-A-0031 105 shows apparatus, similar to that in Fig. 2 herein, in which rolled rod is supplied onto a run-in table for transport towards a cooling bed and wherein electromagnetic means are positioned between longitudinally spaced, transverse rollers of the run-in table to provide braking force on the rolled rod over the length of the rod.
  • DD 226 208 A1 shows a similar arrangement of transport rollers and braking means are in the form of electromagnets located above the rolled rod.
  • the electromagnets are energized to produce braking force on the rolled rod based on various parameters related to the rolled rod and its velocity and acceleration.
  • An object of the invention is to provide a method and apparatus which minimizes the "bouncing effect" on the bars.
  • a further object of the invention is to achieve the above without the use of pinch rollers.
  • a first magnetic means is operatively associated with the lifting apron for applying braking force to a tail end of the rolled rod to reduce the speed of advance of the rolled rod and a second magnetic means is operatively associated with the run-in table in spaced downstream location from the first magnetic means for applying a pulling force to a leading end of the rolled rod to maintain the leading end of the rod in contact with the run-in table as the rod is advanced thereon.
  • a plurality of longitudinally spaced rollers extend transversely of the run-in table and the lifting apron in an arrangement in which the rolled rod advanced to the run-in table rides on said rollers and said rod is transferred on said rollers to said lifting apron, said second magnetic means being disposed in at least some of said rollers.
  • a control means is operatively connected to the first and second magnetic means for activating the first magnetic means when braking action is to be applied to the advancing rolled rod and for activating the second magnetic means when the rolled rod is on the run-in table.
  • Each roller with the included second magnetic means therein comprises a hollow roller member, a hollow rotatable outer shaft supporting the hollow roller member for rotation therewith, a fixed inner shaft rotatably supported within the rotatable outer shaft and an electromagnetic coil fixed to said inner shaft and disposed in said hollow roller member.
  • the inner shaft is hollow and the second magnetic means further comprises electrical leads in the inner shaft connected to the electromagnetic coil.
  • the hollow inner shaft may include means for conveying a cooling fluid to the electromagnetic coil.
  • the hollow roller member may include a detachable portion for exposing the electromagnetic coil.
  • Fig. 1 is a diagrammatic longitudinal view of a conventional arrangement of a run-in table.
  • Fig. 2 is a diagrammatic longitudinal view of another conventional arrangement of a run-in table.
  • Fig. 3 is a diagrammatic longitudinal view of a run-in table, including one embodiment of the present invention.
  • Fig. 4 is an enlarged sectional view of a detail of a roller of the run-in table in Fig. 3.
  • Fig. 5 is an end view of the roller of Fig. 4.
  • Fig. 6 is a diagrammatic transverse view of the run-in table of Fig. 3 with a lifting apron and cooling bed.
  • a continuous length of steel rod is fed to flying shears 3 at relatively high speed from a rolling apparatus incorporating, for example, the NTA method as disclosed in my U. S. patent 5,027,632.
  • the flying shears 3 cut the continuous length of rod into sections 1 which are fed to a run-in table 6 shown in Fig. 6.
  • the run-in table is of double lift apron type and it operates to deliver rod sections 1 to the rakes of a cooling bed 60.
  • the run-in table 6 comprises a plurality of longitudinally spaced rollers 5 rotatably supported by a fixed frame 7 at an inlet end 8 of the run-in table and at a downstream end 9 thereof.
  • the rod sections 1 coming from the flying shears 3 enter the run-in table by riding on the surfaces of the rollers 5.
  • Between the rollers 5 are arms 10 integral with frame 7.
  • the upper surfaces of the rollers 5 are disposed slightly higher than arms 10 to insure that the rod sections 1 ride on the rollers 5.
  • a lifting apron 20 is laterally adjacent to the arms 10 of the run-in table 6.
  • the lifting apron 20 includes a plurality of fingers 21 which can be displaced vertically by a suitable drive mechanism (not shown) between a lowered position shown in dotted outline in Fig.
  • Electromagnetic coils 22 are disposed beneath fingers 21 and form the electromagnetic pads 4.
  • rollers 5 Disposed at the downstream end 9 of the run-in table 6 are the rollers 5, arms 10 and fingers 21 of the lifting apron. No electromagnetic coils 22 are provided at the downstream end. Between the upstream and downstream ends of the table 6 is an intermediate section where rollers 5 are present.
  • the length of the run-in table and the number of rollers 5 is generally a function of the size of the rod sections and their speed of travel as is well known in the art.
  • the rollers 5 at the downstream end 9 of the run-in table 6 include electromagnetic coils 11 therein.
  • the rollers 5 comprise hollow cylindrical bodies 12 fixed to a hollow rotatable shaft 13 mounted in bearings 14.
  • a smaller hollow shaft 15 is concentrically mounted in shaft 13 through the intermediary of bearings 16 between shafts 13 and 15.
  • the inner shaft 15 and coil 11 are stationary.
  • Electrical cables 17 pass through the interior of shaft 15 and are connected to coil 11.
  • a source of cooling liquid 18 is also connected to the interior of shaft 15 to cool the electromagnetic 11.
  • the cylindrical body 12 of the roller 5 includes a flange 12a fixed to shaft 13 and a detachable cylindrical portion 12b connected to flange 12a by bolts 19.
  • the electromagnetic coils 11 and 22 and the lifting apron 20 are connected to a control means 23 in the form of a CPU for activating and deactivating the coils 11 and 22 and raising and lowering the lifting apron 20 in sequence to carry out the following operation.
  • the continuous rod is supplied at relatively high speed to the flying shears 3.
  • the apron 20 is in its raised position as shown in Fig. 6 and the rod rides on the surfaces of rollers 5 at the inlet end 8 of the run-in table.
  • the raised apron 20 keeps the rod in alignment in the rolls of the flying shears approximately at the middle of the rollers 5.
  • the electromagnetic coils 11 are activated to apply a pulling force on the rod to keep the head end of the rod on the rollers 5 and prevent bouncing of the head end of the rod on the rollers 5.
  • the flying shears 3 then cut the rod to separate rod section 1 from the rest of the rod stock.
  • the rollers 5 are then driven in rotation by a drive means 24 to accelerate the separated rod section 1 to space the cut end of the rod section from the adjacent end of the rod stock.
  • the lifting apron 20 is then lowered, electromagnetic coils 11 are deenergized, the drive of rollers 5 is halted and the rod section 1 rolls downwardly by gravity on rollers 5 until the rod section contacts a fixed flange 30 extending lengthwise along the frame 7 of the run-in table.
  • the electromagnetic coils 22 of the electromagnetic pads are energized to apply braking force to the tail end of the rod section 1.
  • the lifting apron 20 When the rod section has slowed sufficiently, the lifting apron 20 is raised to its initial position and the rod section 1 is transferred onto the top of flange 30 where the rod rolls laterally downwards thereon to a second lifting apron 40 which is in a raised position to retain the rod section 1 on flange 30. Lifting apron 40 is subsequently lowered and the rod section 1 rolls laterally downwards thereon to abut against the rakes of the cooling bed 60. When the lifting apron 40 is subsequently raised, the rod section 1 is transferred to the top of the rakes of the cooling bed 60 and the rod is advanced stepwise on the rakes of the bed while undergoing cooling.
  • the run-in table has been disclosed with reference to a two stage lifting apron which assists in slowing down the advancing rod section before it is transferred to the cooling bed.
  • the invention is equally applicable to a one stage lifting apron.
  • the control means 23 activates the electromagnetic coils 11 when the leading end of the rod section 1 enters the downstream section 9 to apply the pulling force on the free leading end of the rod section.
  • the coils 11 are deactivated when lifting apron 20 is lowered so as not to impede the downward rolling travel of the rod section 1 on the fingers 21 of the lifting apron 20.
  • the electromagnetic coils 22 are activated to apply braking force to the trailing end of the rod section, the leading end of the rod section will have been stabilized against bouncing.
  • the coils 22 are deenergized so as not to impede the lifting of the rod section 1 from the rollers 5.
  • the rollers 5 at the downstream section 9 are present in a number which is a function of the length of the cooling bed, the spacing of the rollers being about 1.5 meters.
  • the downward pulling force exerted by the electromagnetic coils 11 in rollers 5 is relatively low and is intended to stabilize the front end of the rod section 1 without applying too great a force which would lift the trailing end of the rod section off the rollers 5.
  • the braking force exerted by the electromagnetic coils 11 is much greater as the leading end of the advancing rod section tends to move downwards against the rollers when the braking force is applied. Hence, the rod remains stable on the rollers 5 without bouncing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Metal Rolling (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)

Claims (10)

  1. Appareil de laminage pour la production à grande vitesse de barre roulée dans lequel la barre roulée (1) est avancée jusqu'à une extrémité d'entrée d'une table d'entrée (6) et après avance de la barre roulée sur la table d'entrée, la barre est déplacée sur un tablier de levage (20) pour un transport consécutif vers un bâti de refroidissement (60), la table d'entrée ayant des rouleaux transversaux (5) espacés longitudinalement dans la direction d'avance de la barre roulée, le tablier de levage (20) ayant des doigts (21) entre les rouleaux qui peuvent être déplacés verticalement entre une position abaissée dans laquelle la barre se déplace sur lesdits rouleaux et une position soulevée dans laquelle la barre est soulevée à l'écart des rouleaux afin d'être amenée sur le bâti de refroidissement, caractérisé en ce que des premiers moyens magnétiques (22) sont associés de manière opérationnelle au tablier de levage afin d'appliquer une force de freinage sur une extrémité arrière de la barre roulée (8) au niveau d'un emplacement amont de la table d'entrée de façon à réduire la vitesse d'avance de la barre roulée et des deuxièmes moyens magnétiques (11) sont associés de manière opérationnelle aux rouleaux (5) de la table d'entrée dans un emplacement en aval espacé (9) par rapport aux premiers moyens magnétiques afin d'appliquer une force de traction sur une extrémité avant de la barre roulée de façon à maintenir l'extrémité avant de la barre en contact avec la table d'entrée lorsque la barre est avancée dessus et des moyens de commande (23) sont prévus pour activer en premier les deuxièmes moyens magnétiques (11) de façon à maintenir l'extrémité avant de la barre roulée contre les rouleaux (5) et activer ensuite les premiers moyens magnétiques (22) lorsque la barre doit être transférée sur le tablier de levage (20).
  2. Appareil selon la revendication 1, caractérisé en ce que lesdits deuxièmes moyens magnétiques (11) sont disposés dans au moins certains desdits rouleaux (5).
  3. Appareil selon la revendication 2, caractérisé en ce que lesdits premiers moyens magnétiques comportent des patins magnétiques (4) disposés sous le tablier de levage entre des rouleaux successifs dans ledit emplacement en amont (8) de la table d'entrée.
  4. Appareil selon la revendication 3, caractérisé en ce que lesdits rouleaux sont inclinés vers le bas depuis la table d'entrée jusqu'au tablier de levage, la barre roulée se déplaçant vers le bas sur les rouleaux lorsque le tablier de levage est dans ladite position abaissée et se déplaçant vers le bas sur lesdits doigts lorsque ledit tablier de levage est dans ladite position soulevée, lesdits moyens de commande (23) désactivant lesdits premier et deuxième moyens magnétiques lorsque le tablier de levage est déplacé de la position abaissée vers la position soulevée.
  5. Appareil selon la revendication 2, caractérisé en ce que lesdits rouleaux dans lesquels sont disposés lesdits deuxièmes moyens magnétiques comportent chacun un élément de rouleau creux (12), un arbre extérieur rotatif creux (13) supportant ledit élément de rouleau creux pour rotation avec celui-ci, un arbre intérieur fixe (15) supporté de façon rotative à l'intérieur de l'arbre extérieur rotatif et une bobine électromagnétique (11) fixée sur ledit arbre intérieur et disposée dans ledit élément de rouleau creux.
  6. Appareil selon la revendication 5, caractérisé en ce que ledit arbre intérieur est creux, lesdits deuxièmes moyens magnétiques comportant en outre des fils électriques (17) dans ledit arbre intérieur reliés à ladite bobine électromagnétique, ledit arbre intérieur creux contenant des moyens (18) destinés à transporter un fluide de refroidissement vers ladite bobine électromagnétique, ledit élément de rouleau creux comprenant une partie détachable (12a) destinée à exposer ladite bobine magnétique dans l'élément de rouleau creux.
  7. Procédé destiné à délivrer des longueurs qui avancent longitudinalement de barre roulée sur un bâti de refroidissement dans lequel la barre roulée est avancée longitudinalement à travers des moyens de cisaillement (3) jusqu'à une table d'entrée (6) où la barre se déplace sur les surfaces de rouleaux espacés longitudinalement (5), caractérisé en ce que :
    une force de traction vers le bas est appliquée par l'intermédiaire de rouleaux choisis desdits rouleaux au niveau d'un emplacement en aval (9) de la table d'entrée de façon à pousser une partie avant de la barre roulée qui avance longitudinalement contre les rouleaux choisis;
    ladite barre roulée étant déplacée latéralement le long desdits rouleaux, depuis ladite table d'entrée sur un tablier de levage (20), alors que ladite barre roulée avance longitudinalement,
    une force de freinage est appliquée sur une partie d'extrémité arrière de ladite longueur d'avance longitudinale de la barre roulée sur ledit tablier de levage; et
    le tablier de levage (20) est ensuite soulevé afin de lever la barre roulée à l'écart des rouleaux pour transport vers le bâti de refroidissement (60).
  8. Procédé selon la revendication 7, caractérisé en ce que la force de traction et la force de freinage sont désactivées lorsque la barre roulée est soulevée à l'écart des rouleaux.
  9. Procédé selon la revendication 7, caractérisé en ce que ladite force de traction vers le bas est appliquée sur la partie avant de ladite barre roulée grâce aux dits rouleaux choisis desdits rouleaux avant que la force de freinage soit appliquée sur la partie arrière de la barre roulée et l'application de la force de traction vers le bas sur la barre est arrêtée avant que la barre soit déplacée latéralement sur le tablier de levage.
  10. Procédé selon la revendication 7, caractérisé en ce que la barre est découpée par les moyens de cisaillement lorsque l'extrémité avant de la barre roulée est sur les rouleaux et est tirée vers le bas sur les rouleaux, et l'avance longitudinale de la longueur de barre roulée est accélérée lorsqu'elle est découpée par les moyens de cisaillement afin d'espacer une extrémité arrière coupée de la barre roulée d'une extrémité avant du reste de la barre.
EP95106982A 1995-05-09 1995-05-09 Procédé et dispositif pour le transfert de barres laminées à un refroidisseur Expired - Lifetime EP0743108B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT95106982T ATE194303T1 (de) 1995-05-09 1995-05-09 Verfahren und vorrichtung zur übergabe gewalzter stäbe an ein kühlbett
ES95106982T ES2149905T3 (es) 1995-05-09 1995-05-09 Procedimiento y dispositivo para conducir barras laminadas a un lecho de enfriamiento.
PT95106982T PT743108E (pt) 1995-05-09 1995-05-09 Metodo e aparelho para fornecer varao laminado a uma cama de arrefecimento
EP95106982A EP0743108B1 (fr) 1995-05-09 1995-05-09 Procédé et dispositif pour le transfert de barres laminées à un refroidisseur
DE69517798T DE69517798T2 (de) 1995-05-09 1995-05-09 Verfahren und Vorrichtung zur Übergabe gewalzter Stäbe an ein Kühlbett

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95106982A EP0743108B1 (fr) 1995-05-09 1995-05-09 Procédé et dispositif pour le transfert de barres laminées à un refroidisseur

Publications (2)

Publication Number Publication Date
EP0743108A1 EP0743108A1 (fr) 1996-11-20
EP0743108B1 true EP0743108B1 (fr) 2000-07-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95106982A Expired - Lifetime EP0743108B1 (fr) 1995-05-09 1995-05-09 Procédé et dispositif pour le transfert de barres laminées à un refroidisseur

Country Status (5)

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EP (1) EP0743108B1 (fr)
AT (1) ATE194303T1 (fr)
DE (1) DE69517798T2 (fr)
ES (1) ES2149905T3 (fr)
PT (1) PT743108E (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110102582A (zh) * 2019-05-16 2019-08-09 中冶南方工程技术有限公司 一种短尺棒材自动分离装置
CN113909312B (zh) * 2020-07-10 2024-04-26 北京京诚瑞信长材工程技术有限公司 一种多切分冷床上钢系统
CN111804742A (zh) * 2020-07-12 2020-10-23 铜陵市富鑫钢铁有限公司 一种棒材上冷床尾部制动装置
CN112718886A (zh) * 2020-12-11 2021-04-30 陕西龙门钢铁有限责任公司 一种在轧钢生产中对高温螺纹钢输送和转移至冷床的装置
CN114602975A (zh) * 2022-03-11 2022-06-10 山东钢铁集团永锋临港有限公司 一种解决控轧控冷棒材精轧堆钢无法碎断的飞剪设备
CN117000790A (zh) * 2023-10-07 2023-11-07 陕西钢铁集团有限公司 轧钢短距离上冷床的头尾分离装置及分离方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE474336C (de) * 1927-09-17 1929-03-30 Schloemann Akt Ges Rolle zum Foerdern magnetisierbarer Gegenstaende
EP0031105B1 (fr) * 1979-12-24 1983-07-06 Sms Schloemann-Siemag Aktiengesellschaft Dispositif pour varier la vitesse des produits chauds à laminer sur des tables à rouleaux de lits de refroidissement par des champs magnétiques
DD228391B1 (de) * 1984-07-25 1987-08-26 Thaelmann Schwermaschbau Veb Magnetbremsschieber fuer einen auflaufrollgang vor dem kuehlbett
DD226208A1 (de) * 1984-07-25 1985-08-21 Thaelmann Schwermaschbau Veb Verfahren und schaltungsanordnung zum abbremsen von walzgut
US5027632A (en) * 1990-02-02 1991-07-02 Pong David T No-twist slit-rolling approach ("NTA") apparatus and method for manufacturing steel reinforcing rod

Also Published As

Publication number Publication date
DE69517798T2 (de) 2001-02-01
EP0743108A1 (fr) 1996-11-20
PT743108E (pt) 2000-12-29
DE69517798D1 (de) 2000-08-10
ES2149905T3 (es) 2000-11-16
ATE194303T1 (de) 2000-07-15

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