EP0037752B1 - Vorrichtung zum Führen von Bahnen und ihre Anwendungen - Google Patents

Vorrichtung zum Führen von Bahnen und ihre Anwendungen Download PDF

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Publication number
EP0037752B1
EP0037752B1 EP81400380A EP81400380A EP0037752B1 EP 0037752 B1 EP0037752 B1 EP 0037752B1 EP 81400380 A EP81400380 A EP 81400380A EP 81400380 A EP81400380 A EP 81400380A EP 0037752 B1 EP0037752 B1 EP 0037752B1
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EP
European Patent Office
Prior art keywords
rollers
series
roller
strip
axes
Prior art date
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Expired
Application number
EP81400380A
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English (en)
French (fr)
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EP0037752A1 (de
Inventor
Charles Brun
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.)
USINOR SA
Original Assignee
Union Siderurgique du Nord et de lEst de France SA USINOR
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.)
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Publication date
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Publication of EP0037752A1 publication Critical patent/EP0037752A1/de
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Publication of EP0037752B1 publication Critical patent/EP0037752B1/de
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/24—Advancing webs by looping or like devices
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/562—Details
    • C21D9/563—Rolls; Drums; Roll arrangements

Definitions

  • the present invention relates to devices for guiding a strip material, of the type comprising at least two series of rollers situated in different horizontal planes, and in which the strip passes alternately from a roll of a series to a roll of 'another series.
  • Such devices are used in particular in vertical accumulators of the type described in patent FR-A-1248731 the accumulators are interposed in continuous strip processing lines, so as to constitute a reserve of strip making it possible to slow down or stop the line upstream of the accumulator while maintaining the downstream operating speed, or vice versa, slowing down or stopping the line downstream of the accumulator while maintaining the normal upstream running speed.
  • a similar arrangement is also used in continuous treatment ovens and in particular in annealing ovens in which to obtain a sufficient treatment time, the strip follows a winding path alternately passing from a roll of a series to a roller from another series.
  • the distance between lower and upper rollers is constant.
  • a biconical or domed shape is chosen for the latter, of generally parabolic section, the maximum diameter of which is situated in the median plane of the roller.
  • the strip brought to relatively high temperatures can only withstand very low tensile forces.
  • the rolls are brought to a high temperature and the strip is significantly cooler than the roll. It follows that the expansion of the roller, stronger outside the strip than in the zone cooled by contact with this strip, produces an unfavorable thermal profile for the holding of the strip. Taking into account the temperature of the strip and the curved shape of the rollers, as well as the tensile force necessary to apply the strip against the rollers, it is possible to generate permanent deformation in the latter, in particular for very thin and wide strips. .
  • the problem to be solved therefore consists in perfecting a guiding device of the type defined above, in order to allow satisfactory guiding and self-centering of the strip for traction levels lower than those which are necessary in known devices.
  • the subject of the invention is a device for guiding a strip material, characterized in that at least the rollers of each serue, which are arranged between the inlet and outlet rollers, have their parallel axes between them, and that seen in projection on a horizontal plane, the axes of the rollers of one series form with the axes of the rollers of the other series, an acute angle whose bisector is perpendicular to the mean direction of travel of the strip .
  • a device for guiding a strip material B which can, for example, be used in a vertical accumulator inserted in a continuous processing line.
  • Such an accumulator comprises a tower, a fixed lower frame in which the rollers of a first series are journalled, and an upper frame movable vertically and on which the rollers of a second series are journalled.
  • these various components and devices being perfectly known and conventional have not been shown in the drawing, a simple diagram sufficient to highlight the characteristics of the invention.
  • the device comprises an input roller 1 an output roller 2 of the accumulator, these two rollers with axes perpendicular to the direction XX of travel of the strip being situated at the same level as a series of lower rollers 3.
  • the guide device is completed by a series of upper rollers 4.
  • the axes U-U and V-V of the lower and upper rollers form acute angles between them, the bisector Y-Y of which is perpendicular to the direction X-X of travel of the strip.
  • the axes of the lower rollers and the axes of the upper rollers form, with respect to the normal to this direction, acute angles equal to and opposite, preferably less than 45 °.
  • the rollers have a convex shape and according to the invention, a relationship is established between the angle a and the value of this convex which can be characterized by the difference between the maximum diameter and the minimum diameter of the roller.
  • the roll has a parabolic profile.
  • the relationship between the angle a and the convex value is intended to obtain compensation for the variation in length of the generatrices of the strip, between two consecutive rollers, which results from the convex shape of these rollers.
  • the upper rollers and the lower rollers may not have the same convex characteristics, the upper rollers having a more marked profile than their lower counterparts. Indeed, under the effect of its own powders, the strip is applied more effectively on the upper rolls which can therefore have a greater variation in section than the lower rollers. This results in good contact of the strip with the rollers and perfect guidance for the entire useful travel of the accumulator.
  • a roller accumulator is produced, the series of lower and upper rollers of which are inclined more or less 20 ° respectively from the normal to the line of displacement.
  • the input and output rollers located as in the drawing roughly at the level of the fixed rollers are perpendicular to this line of travel.
  • the angle of twist of the input and output strands being smaller than in the normal part current of the accumulator, we adopt for these input and output rollers a significantly lower convex value.
  • the minimum input tension is 3000 newtons and for an accumulator 80 m high, having a useful stroke of 60 m, the maximum tension at the level of the upper rollers is approximately 32,000 newtons.
  • the minimum voltage at the output of such an 8-strand accumulator is approximately 15,000 newtons.
  • the lengths of all the generators of the strip between two consecutive rollers are approximately equal so that satisfactory contact strip with the roller can be obtained with a lower pull, just sufficient to bend the strip in contact with the roller.
  • the different characteristics chosen for the input rollers, the lower rollers and the upper rollers make it possible to further improve this result.
  • the invention can be implemented under similar conditions in the case of a pit accumulator whose upper rollers are fixed and whose lower rollers are carried by a frame which can be moved vertically.
  • the input and output rollers are located in the vicinity of the fixed upper rollers.
  • a device according to the invention is used in a heat treatment oven 10 and in particular in an oven for continuous annealing of a strip material.
  • the inlet 11 and outlet 12 rollers, the axes of which are normal to the line of travel of the sheet are located approximately halfway up the furnace and the guide device.
  • the rollers 13 of the lower series are inclined at an angle + a relative to the normal to the line of travel, while the rollers 14 of the upper series are inclined at an angle -a compared to this same normal.
  • This arrangement is particularly well suited to this application, since the distance between the upper and lower rollers is invariable, so that the relationship between the angle a and the convex value of the lower and upper rollers can be chosen so as to obtain a approximately constant generator length over the entire width of the strip in its path in the guide device.
  • the rollers having a diameter of 700 mm and a length of 1600 mm are spaced 18 m apart.
  • the angles a are 15 °, which makes it possible to compensate for a bulge representing a difference in diameter of 3 mm.
  • the convex machining at room temperature is between 4 and 8 mm for the rollers of the furnace heating zone and can be 2 to 4 mm for the rollers of the holding zone and cooling zones.
  • the inlet and outlet rollers of each chamber are, as in the example shown, placed halfway up in the oven and are normal to the line of travel.
  • the curved value of these input and output rolls is between 1 and 2 mm.
  • the heating devices which are incorporated in the oven and which in general extend from the side walls of the latter must be arranged taking account of the helical path of the strips inside the oven.
  • the position and orientation of these heating elements is determined by the shape of the intervals delimited between two adjacent strands of the strip.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Tunnel Furnaces (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (9)

1. Vorrichtung zur Führung von Bandmaterial, mit wenigstens zwei in unterschiedlichen horizontalen Ebenen liegenden Sätzen von Walzen (1, 2, 3, 4, 11, 12, 13, 14), in welchen das Band abwechselnd von einer Walze des einen Satzes zu einer Walze des anderen Satzes verläuft, dadurch gekennzeichnet, daß wenigstens die Walzen (3, 4, 13, 14) eines jeden Satzes, die zwischen den Eingangswalzen (1, 11) und den Ausgangswalzen (2, 12) liegen, unterinander parallele Achsen haben, und daß, gesehen in Projektion auf eine horizontale Ebene, die Achsen der Walzen eines Satzes mit den Achsen der Walzen des anderen Satzes einen spitzen Winkel (a) bilden, dessen Winkelhalbierende (Y-Y) senkrecht zur mittleren Ablaufrichtung (X-X) des Bandes liegt.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Achsen eines Walzensatzes mit der Normalen zur Ablaufrichtung (X-X) des Bandes einen Winkel a von weniger als 45° bilden.
3. Vorrichtung nach irgendeinem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß die Eingangswalzen (1, 11) und die Ausgangswalzen (2, 12) senkrecht zur Ablaufrichtung (X-X) des Bandes liegen.
4. Vorrichtung nach irgendeinem der Ansprüche 1 bis 3, wobei sie bombierte Walzen aufweist, dadurch gekennzeichnet, daß man die Werte des erwähnten Winkels a und der Bombierung der Walzen so wählt, daß die forgende Beziehung im wesentlichen erfüllt sit:
Figure imgb0003
wobei ist: b die Differenz zwischen Maximaldurchmesser und Minimaldurchmesser einer Walze,
I die Länge einer Walze
d der Abstand zwischen den Horizontalebenen, welche die Achsen der oberen und unteren Walzen enthalten.
5. Vorrichtung nach Anspruch 4, bei welcher der Abstand zwischen den beiden Sätzen von Walzen (3, 4) veränderbar ist, dadurch gekennzeichnet, daß man die Werte des erwähnten Winkels a und der Bombierung der Walzen (3, 4) so wählt, daß die vorstehende Beziehung im wesentlichen für einen mittleren Abstand der beiden Walzensätze verifiziert ist.
6. Vorrichtung nach irgendeinem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die oberen Walzen (4) stärker bombiert sind als die unteren Walzen (3).
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Eingangswalzen (1) und die Ausgangswalzen (2) weniger bombiert sind als die unteren Walzen (3) und die oberen Walzen (4).
8. Vorrichtung nach irgendeinem der Ansprüche 4 bis 7, dadurch gekennzeichnet, daß man, bei Arbeiten der Vorrichtung bei einer gewissen Temperatur, den Winkel a so wählt, daß die der Restbombierung nach thermischer Verformung entsprechenden Längenunterschiede der Erzeugenden kompensiert werden.
9. Bandbehandlungsanlage mit einer Vorrichtung nach irgendeinem der vorstehenden Ansprüche, mit Heizeinrichtungen, dadurch gekennzeichnet, daß die Heizeinrichtungen so angeordnet und ausgerichtet sind, daß sie sich in die benachbarte Stränge des Bandes trennenden Zwischenräume erstrecken.
EP81400380A 1980-03-26 1981-03-12 Vorrichtung zum Führen von Bahnen und ihre Anwendungen Expired EP0037752B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8006670A FR2479164A1 (fr) 1980-03-26 1980-03-26 Dispositif de guidage de materiau en bande et ses applications
FR8006670 1980-03-26

Publications (2)

Publication Number Publication Date
EP0037752A1 EP0037752A1 (de) 1981-10-14
EP0037752B1 true EP0037752B1 (de) 1983-04-27

Family

ID=9240106

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400380A Expired EP0037752B1 (de) 1980-03-26 1981-03-12 Vorrichtung zum Führen von Bahnen und ihre Anwendungen

Country Status (5)

Country Link
US (1) US4358267A (de)
EP (1) EP0037752B1 (de)
JP (1) JPS56149577A (de)
DE (1) DE3160201D1 (de)
FR (1) FR2479164A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59118653A (ja) * 1982-12-25 1984-07-09 Sumitomo Metal Ind Ltd ストリツプの蛇行防止方法
JPS6036626A (ja) * 1983-08-06 1985-02-25 Kawasaki Steel Corp 連続焼鈍装置
US5410389A (en) * 1993-08-30 1995-04-25 Xerox Corporation Neutral side force belt support system
FR3063737B1 (fr) * 2017-03-13 2020-06-26 Fives Stein Ligne continue de recuit ou de galvanisation comprenant un bloc tensionneur entre deux fours consecutifs
FR3063738B1 (fr) * 2017-03-13 2023-01-20 Fives Stein Ligne continue comprenant au moins une chambre dans laquelle la longueur de bande est ajustable
CN110331269B (zh) * 2019-08-07 2020-11-13 沈阳飞机工业（集团）有限公司 一种机加框零件热处理控形夹具及装夹方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2232391A (en) * 1939-06-20 1941-02-18 John D Keller Method and apparatus for annealing strip
GB775552A (en) * 1953-12-04 1957-05-29 United States Steel Corp Apparatus for accumulating strip during feeding
US3032248A (en) * 1959-01-28 1962-05-01 United States Steel Corp Apparatus for continuously centering a moving strip
US3188063A (en) * 1963-07-18 1965-06-08 Nat Steel Corp Method and apparatus for controlling the position of strip material in furnaces
US3306594A (en) * 1965-02-24 1967-02-28 Crompton & Knowles Corp Closed heat treating chamber having a seal roll oscillating mechanism
US3401860A (en) * 1966-04-13 1968-09-17 Buckbee Mears Co Compensator stand
US3871816A (en) * 1973-08-03 1975-03-18 Gen Tire & Rubber Co Drive mechanism for passing continuous strip through an oven

Also Published As

Publication number Publication date
JPS56149577A (en) 1981-11-19
FR2479164B1 (de) 1984-10-26
EP0037752A1 (de) 1981-10-14
US4358267A (en) 1982-11-09
FR2479164A1 (fr) 1981-10-02
DE3160201D1 (en) 1983-06-01

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