EP0442645B1 - Verfahren und Vorrichtung zur Korrektur einer Biegung in Breitenrichtung im Endbereich eines warmgewalzten, plattenförmigen Produktes - Google Patents

Verfahren und Vorrichtung zur Korrektur einer Biegung in Breitenrichtung im Endbereich eines warmgewalzten, plattenförmigen Produktes Download PDF

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Publication number
EP0442645B1
EP0442645B1 EP19910300920 EP91300920A EP0442645B1 EP 0442645 B1 EP0442645 B1 EP 0442645B1 EP 19910300920 EP19910300920 EP 19910300920 EP 91300920 A EP91300920 A EP 91300920A EP 0442645 B1 EP0442645 B1 EP 0442645B1
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EP
European Patent Office
Prior art keywords
product
rollers
hot
bend
pushing
Prior art date
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Expired - Lifetime
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EP19910300920
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English (en)
French (fr)
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EP0442645A3 (en
EP0442645A2 (de
Inventor
Yoshio Takakura
Tomoaki Kimura
Toshiyuki Kajiwara
Teruo Sekiya
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Hitachi Ltd
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Hitachi Ltd
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Publication date
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Publication of EP0442645A3 publication Critical patent/EP0442645A3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering
    • 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
    • B21B39/14—Guiding, positioning or aligning work

Definitions

  • This invention relates to a method for correcting a widthwise bend in an end portion of a hot-rolled elongate sheet-shaped metal product, the correction being performed while the product is still hot from the hot-rolling or after reheating of the product.
  • the invention further relates to a hot strip mill including straightening apparatus for correcting such a bend.
  • the invention is particularly applicable to hot-rolled products of steel and aluminium.
  • the products may be intermediate products or final products.
  • a hot ingot is first passed several times through a roughing mill which forms it into a so-called bar, which is an elongate sheet-shaped product.
  • bar which is an elongate sheet-shaped product.
  • this bar has a width of 900 to 1500mm, a thickness of 20 to 80mm and a length of for example, 50m.
  • This bar when intended for further rolling into a strip, is fed into a finishing mill comprising a number of roll sets and is coiled as a strip having a thickness of, for example, 2 to 6mm, while still hot.
  • the product from the roughing mill may take the finished form of a so-called sheet or plate.
  • All of these products from the roughing mill may suffer from the defect of a lateral bend in their head end portion or their tail end portion.
  • the bend in the head end portion is usually larger, and causes greater difficulties, particularly if the product is a bar which is subjected to finishing rolling as described above.
  • the bent head end causes problems during threading into the finishing train, which can lead to non-uniform thickness of the rolling in the finishing train and also a problem of folding of the leading end, as well as possible difficulties in coiling.
  • edger rollers which engage the edges of the bar during a rolling pass through the roughing mill.
  • edger rollers have vertical axes which are adjustable laterally of the bar and remain fixed during a rolling operation.
  • a problem particularly caused here is that the edger roller presses with high force against the bar, causing thickening of the bar at that side, with consequent further problems during rolling.
  • fixed side guides are disposed at several locations on the conveyor table for the hot-rolled bar, e.g. as illustrated in the Japanese-language Iron & Steel Handbook, page 416, for example.
  • These side guides are fixed during rolling, but may effect some straightening of a bar having a widthwise bend simply by pressing upon the bar.
  • the amount of straightening is small, because such guides are designed with a clearance between them and the edges of the bar. Typically this clearance is about 50mm and is necessary because the edge of the strip is not straight. Accordingly, such a side guide cannot effect correction of a bend except perhaps over a very long length of the bar.
  • DE-A-1 527964 describes apparatus for cold-bending and cold-straightening of metal strip, having two pairs of centering rollers upstream of a flattening roll mill, and pushing rollers for bending or straightening downstream of the roll mill.
  • the object of the present invention is to provide a method and apparatus for correcting a bend in a hot-rolled product, in order to avoid at least partly the problems discussed above.
  • the present invention is based on the realization that it is possible successfully to remove, at least partly, a widthwise bend in a hot-rolled product, while it is hot, by pushing the end portion laterally relative to an adjacent portion which is maintained along an axis so as to resist the pushing force. This can be done at a location spaced from any roll set. A laterally moving member is required to provide the lateral movement of the end portion. Fixed guides are not sufficient. In order to achieve the removal of the bend, at least partially, it is necessary to effect plastic deformation. It has now been found that this can be done without loss of planarity of the sheet-shaped product, i.e. buckling, and without deformation of the edge of the product by the forces applied to it.
  • the material of the product must be sufficiently plastically deformable; practical limits are discussed below, and depend on at least temperature, thickness and width of the product.
  • the product In applying the appropriate forces to the hot-rolled product, various factors must be taken into consideration, depending on each case. Such factors are the temperature of the product, and width and thickness of the product. If it is too thin or too wide, there may be a risk of buckling or of deformation of the edges. Thus, the product should have the appropriate deformability, based on its Young's modulus and yield stress at the temperature in question.
  • the invention can be applied to a hot-rolled product which is temporarily held stationary for the bending operation to take place, this is not preferred, because the stopping of the hot product is liable to cause non-uniform cooling of parts thereof, leading to problems during subsequent rolling. Therefore, the invention is preferably performed upon a product which is moving continuously.
  • the product is sufficiently held against lateral movement caused by the pushing force, this restraint occurring over a holding portion having a predetermined length adjacent the bend portion. It is sufficient to support the product at only the opposite ends of this holding portion, and at least for reasons of simplicity this is preferred in the invention. Alternatively, further supports may be provided between the ends of this holding portion.
  • the distance l1 between the pushing member which effects the correction of the bending and the nearer end of the holding portion is not larger than the length l2 of the holding portion, and more preferably l2 is not less than 1.5 l1.
  • the distance of lateral pushing effected by the pushing member is more than that required merely to straighten the bend, that is to say an excess or overpush is performed.
  • the end portion When the end portion is released by retraction of the pushing member, it will spring back to a certain extent. If correctly calculated, this springback will bring the end portion back to the straight position, so that the bend is completely removed. Since, at least approximately, the amount of springback is independent of the plastic deformation which has taken place, the amount of the overpush required is independent of the amount of the initial bend.
  • the pushing member so that, for each of a series of similar products which are subjected to straightening, it pushes the bent end portion to the same position, giving a predetermined amount of overpush, regardless of the initial pushing position.
  • This predetermined amount of overpush is selected in accordance with the dimensions, temperature and nature of the material of the product.
  • the invention lies in a method of correcting a widthwise bend of an end portion of a hot-rolled elongate sheet-shaped metal product while it is hot, comprising applying a lateral pushing force to said end portion by means of a laterally moving member so as at least partly to eliminate the bend while holding a longitudinally extending portion of the product adjacent the end portion at both edges so as to resist the pushing force.
  • the pushing force is sufficient to cause non-elastic deformation, while maintaining planarity of said product and substantially avoiding deformation of the edges of said product.
  • the invention provides a hot strip mill having a straightener, as set out in claim 6.
  • the edge engaging means of the straightener comprise longitudinally spaced pairs of opposed rollers and means for moving the rollers laterally into engagement with the edges of the product.
  • the means for moving the rollers may comprise a pair of side frames positioned respectively at the two sides of the elongate zone and supporting the rollers so that the roller axes on each side of the elongate zone are in a common plane, the common planes being parallel.
  • Means are provided for moving the side frames towards and away from the elongate zone while maintaining the common planes parallel.
  • the pushing member of the pushing means may be mounted on one of the side frames.
  • the straightener has a pair of the pushing members, mounted on opposite sides of the elongate zone, the drive means being arranged to cause the pushing member to push the bent end portion laterally from one of the opposite sides, in dependence on the direction of the bend.
  • the edge engaging means has, at a first one of the two longitudinally spaced positions which is closer to the pushing member, roller means for contacting an edge of said product, said roller means comprising a plurality of rollers rotatable about vertical axes which, as seen in plan view, lie on a curve, so that the spacing of the axes from the elongate zone increases with decrease of the distance of the axes from the pushing member.
  • the two longitudinally spaced positions at which the edge engaging means engages said edges of said product are spaced apart longitudinally by a distance greater than the longitudinal distance along said zone between the pushing member and the closer of the two longitudinally spaced positions thereto.
  • the length of the bent end portion at the leading end of a so-called bar product emerging from the roughing mill is about 4m.
  • the distance l1 mentioned above is preferably in the range 3.5 to 5.5m, and the length l2 mentioned above is correspondingly at least equal to this distance or larger.
  • the thickness of such a product is typically in the range 20 to 80mm and its width in the range 900 to 1500mm, although narrower products, e.g. down to 600mm or wider products, e.g. up to 2m, may also be suitable in the invention.
  • the thickness is preferably in the range 20 to 40mm, in order for the invention to apply satisfactorily, and when the width is in the range 900 to 1500mm, the thickness may be in the range 40 to 80mm.
  • the products in question are normally mild steel, silicon steel or stainless steel, and the temperature of the product during the straightening operation in a hot strip mill is generally over 700°C, preferably at least 900°C.
  • Such a product is typically moving at a speed of about 2 m/s on the roller table, so that pushing means must operate in preferably a time of 1 s or even less.
  • the relevant temperature is lower, for example in the region of 400 to 500°C.
  • the invention is in principle applicable to both the head end and the tail end, it is more effective when applied to the head end.
  • the correcting apparatus of the present embodiment is equipped with a pinch roller 2 for feeding forward a hot-rolled sheet 1 having a bend A at its leading end.
  • This pinch roller 2 is driven by a drive motor 5 through a bearing 3 and a reduction gear mechanism 4.
  • Downstream of the pinch roller 2 there are arranged at the two sides of the path of the hot-rolled sheet 1 a pair of side guide frames 6, which are driven to open or close by a drive motor 11 through racks 7 and 8, pinions 9 and a reduction gear machanism 10, as also shown in Fig. 2.
  • a pair of opposed vertical rollers i.e.
  • first rollers 12 and second rollers 13 which are moved away from or towards each other by opening or closing the side guide frames 6. Downstream of these first and second rollers 12 and 13, there are arranged another opposed pair of vertical pushing rollers, i.e. third rollers 14. These rollers 14 are attached to movable frames 15, which in turn are hinged by means of vertical pins 16 to the front end portions of the side guide frames 6. When the movable frames 14 are driven by means of cylinders 17, the third rollers 14 are pushed widthwise of the hot-rolled sheet 1.
  • the hot-rolled sheet 1 when and after the leading end of the hot-rolled sheet 1, which is still in hot condition, passes the first and second rollers 12 and 13, the hot-rolled sheet 1 has its leading end given a sufficient counter bend and corrected by holding the hot-rolled sheet 1 centrally of its path line by means of the first and second rollers 12 and 13 and by pushing the third rollers 14 widthwise. At this time, the feeding force necessary for moving the bar during correcting of the bend of the leading end is given the pinch roller 2.
  • the first, second and third rollers 12, 13, and 14 are held on standby while in the open state, as shown at (a) in Fig. 3, until the leading end of the hot-rolled sheet 1 having the bend A passes the second rollers 13.
  • the first and second rollers 12 and 13 are moved widthwise, as shown at (b) in Fig. 3, to hold or restrain the hot-rolled sheet 1 centrally of the path line.
  • the third rollers 14 are not yet in contact with the sides of the hot-rolled sheet 1.
  • the third rollers 14 As the leading end of the hot-rolled sheet 1 passes the third rollers 14, one of these rollers 14 gradually starts to push.
  • This lateral push of the third rollers 14 is performed by forcing widthwise the roller 14 located in the bend direction of the leading end, i.e., the lower roller in the case as shown.
  • the remaining opposite or upper roller, as shown is either caused to follow the lower one or held in its open position.
  • the push of the third roller 14 is performed to a position over the sheet width beyond the position corresponding to the straight sheet, i.e. there is an over-push. This is because a relatively large bend is left after the push unless the push is excessive, since the hot-rolled sheet is elastic and springs back when released.
  • Fig. 4 plots the experimental results concerning the relation of necessary depths of over-push ⁇ (equal to the amount of the spring back) to the width B of the hot-rolled sheet 1 for different values of the parameter of span l1 between the second and third rollers 13 and 14 and for material of Young's modulus 1.2 x 104kg/mm2and yield stress of 6 kg/mm2. It is understood from the graph that the necessary depth of push ⁇ becomes more for the smaller sheet width B and for the longer span l1.
  • the residual bend is reduced to one quarter or less of the initial bend of the leading end.
  • the bend of the leading end of the hot-rolled sheet 1 is usually 30 to 40mm or less.
  • the residual bend after the correction is 10mm or less.
  • the bend of the leading end of the hot-rolled sheet can be positively corrected to improve the passage through the finish rolling machine thereby to prevent reduction and offset at the take-up machine and to improve the production yield.
  • the push of the hot-rolled sheet is accomplished by means of the rollers 12, 13 and 14, the correction of the bend of the leading end can be accomplished while the hot-rolled sheet is being continuously fed. With this correction during the movement of the hot-rolled sheet 1, it is possible to prevent the temperature of the hot-rolled sheet 1 from dropping and the sheet from being cooled down at the feed rollers.
  • the first to third rollers 12, 13 and 14 have to be opened or closed at high speeds. Preferably the actual pushing is accomplished in 1 s or less.
  • the first and second rollers 12 and 13 and the third rollers 14 have to be operated at predetermined timings. These timings can be realized, for example, by arranging a sensor upstream of the pinch roller 2 to detect the passage of the leading end of the hot-rolled sheet, and by driving the motor 11 and by driving the cylinders 16 at predetermined times after detection.
  • the bend of the leading end of the hot-rolled sheet 1 is usually 30 to 40mm or less and is frequently located at a distance of about 5m from the leading end.
  • the distance between the second rollers 13 and the third rollers 14 is desirably 5m or less, e.g. about 4m.
  • the direction of pushing of the bent end depends upon the direction of the bend being corrected. Since, as explained above, the end position to which the pushing member pushes the bent end can be chosen independently of the initial amount of bend, the control of the apparatus in dependence upon the particular product can be limited to control of the direction of pushing. This can be done manually, following inspection of the next product to be treated. Alternatively, a sensor may be arranged to detect the direction of the bend and control the direction of pushing accordingly.
  • the side guide frames 20 are constructed to carry the first and second rollers 12 and 13 only and are opened or closed by means of the mechanism of the racks 7 and 8 and the pinions 9.
  • the third rollers 14 are carried by chocks 21 which can be reciprocated in a stand 22.
  • the third rollers 14 are opened or closed by driving push means 23, which are connected to the chocks 21, by means of motors 25 through gear mechanisms (not shown) which are built in the stand 22 and reduction gear mechanisms 24.
  • Fig. 8 differs only at the second rollers.
  • the second rollers are not constructed as a single pair of rollers but are each composed of a number of vertical small-diameter basket rollers 30 having a large virtual roller diameter.
  • the axes of these rollers 30 lie on a curve, so that they are increasingly spaced from the centre line of the path of the moving hot-rolled sheet in the downstream direction. This structure is made to avoid the local deformation of the hot-rolled sheet.
  • what is given most intense force for the correction in the foregoing embodiments is the second rollers 13.
  • the load can be dispersed by using the numerous basket rollers 30 having a large virtual roller diameter so that the tendency to width reduction can be decreased.
  • Fig. 9 shows diagrammatically a hot strip mill to which the invention is applied.
  • a hot ingot 40 e.g. from a soaking furnace passes through a scale breaker 42 to a roughing mill 44 where it is rolled in many passes into a bar of sheet shape. Then it is straightened by straightening apparatus 46 of the invention as illustrated above before being rolled in a single pass through finishing train roll stands 48 and being coiled at coiler 50.
  • a mild steel bar of dimensions 40mm thick, 1000mm wide and 60m long at 1000°C (Young's modulus 1.1 x 104 kg/mm2, yield stress 6.0 kg/mm2) is moved at 1.2 m/s. It had an initial bend of 40mm at its leading end.
  • the span l1 (see Fig. 4) between second rollers 13 and the pushing rollers 14 is 4500mm, and the span l2 between the first and second rollers is 6750mm. Straightening of the bend to a residual bend of less than 10mm was achieved in the manner described above.
  • the maximum bending force at the second roller 13 was 23000 kg.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)

Claims (10)

  1. Verfahren zum Korrigieren einer Biegung in Breitenrichtung im Endbereich eines warmgewalzten, langen, bandförmigen Metallerzeugnisses (1), während es warm ist, das folgende Schritte gleichzeitiger Bearbeitung aufweist:
    (i) Festhalten der Enden des Erzeugnisses (1) an mindestens zwei Positionen (12,13), die in Längsrichtung entlang des Erzeugnisses voneinander beabstandet sind, um dadurch zumindest in Querrichtung einen Teil des Erzeugnisses zu halten, der vom genannten Ende beabstandet ist; und
    (ii) Drücken auf diesen Endbereich in Querrichtung durch ein sich in Querrichtung bewegendes Teil (14), um die Biegung zumindest teilweise zu korrigieren.
  2. Verfahren nach Anspruch 1, bei dem die Schritte (i) und (ii) ausgeführt werden, während das Erzeugnis kontinuierlich entlang eines Pfades läuft.
  3. Verfahren nach Anspruch 2, bei dem die Schritte (i) und (ii) durch Walzen ausgeführt werden, die sich um vertikale Achsen drehen können.
  4. Verfahren nach Anspruch 3, bei dem der Schritt (i) durch zumindest zwei in Längsrichtung voneinander beabstandeten Paaren von Walzen (12, 13) ausgeführt wird, wobei jedes Paar einander gegenüberstehende Walzen aufweist, die jeweils an entgegengesetzten Kanten des Erzeugnisses angreifen, wobei die Achsen der Walzen in zwei parallelen Ebenen an entgegengesetzten Seiten des Erzeugnisses liegen, und wobei die Walzen so verstellt werden, daß sie in Eingriff mit den Kanten des Erzeugnisses gelangen, während diese Ebenen parallel gehalten werden.
  5. Verfahren nach einem der Ansprüche 1 bis 4, bei dem der Schritt (ii) ein Drücken auf den genannten Endbereich in Querrichtung mit einem Betrag aufweist, der größer als der Betrag der Biegung ist, wobei es zugelassen ist, daß der Endbereich nach dem Drückvorgang zurückfedern kann.
  6. Band-Heißwalzwerk mit:
    (a) einem Aufrauhwerk (44);
    (b) einem Endbearbeitungswerk (48);
    (c) einer Fördereinrichtung zum Fördern eines langgestreckten, aufgerauhten Stangenerzeugnisses vom Aufrauhwerk zum Endbearbeitungswerk; und
    (d) einer Geraderichteinrichtung (46), die so ausgebildet ist, daß sie eine Endbiegung des aufgerauhten Stangenerzeugnisses korrigiert, während diese noch heiß ist und sich auf der Fördereinrichtung befindet, wobei die Geraderichteinrichtung folgendes aufweist:
    (i) eine langgestreckte Zone zum Aufnehmen des Erzeugnisses (1);
    (ii) eine Einrichtung (12, 13) zum Angreifen an den Kanten des Erzeugnisses an zumindest zwei in Längsrichtung entlang dieser Zone voneinander beabstandeten Positionen, um das Erzeugnis zumindest gegen Querbewegung in dieser Zone festzuhalten; und
    (iii) eine Drückeinrichtung mit mindestens einem Drückteil (14), das in Längsrichtung entlang der Zone ausgehend von der Angriffseinrichtung beabstandet ist, um mit dem Endbereich in Berührung zu stehen, und mit einer Antriebseinrichtung (17), die dafür sorgt, daß das Drückteil in Querrichtung auf den Endbereich drückt.
  7. Band-Heißwalzwerk nach Anspruch 6, bei dem die Kantenangriffseinrichtung in Längsrichtung voneinander beabstandete Paare einander gegenüberstehender Walzen (12, 13) und eine Einrichtung (6-11) zum Verstellen der Walzen in Querrichtung so, daß diese in Eingriff mit den Kanten des Erzeugnisses gelangen, aufweist.
  8. Band-Heißwalzwerk nach Anspruch 7, bei dem die Einrichtung zum Verstellen der Walzen folgendes aufweist: (a) ein Paar Seitenrahmen (6) an den zwei Seiten der langgestreckten Zone, die die Walzen (12, 13) so halten, daß sich die Walzenachsen an den zwei Seiten in parallelen Ebenen befinden, und (b) eine Einrichtung (7-11) zum Verstellen der Seitenrahmen (6) zur langgestreckten Zone hin und von dieser weg, während die Ebenen parallel gehalten werden.
  9. Band-Heißwalzwerk nach einem der Ansprüche 6 bis 8, bei dem die Angriffseinrichtung (12, 13) an ihrem dem Drückteil (14) näherliegenden Ende eine Walzeneinrichtung zum Herstellen einer Berührung zu einer Kante des Erzeugnisses aufweist, wobei die Walzeneinrichtung mehrere Walzen (30) aufweist, die um Vertikalachsen drehbar sind, die, in Draufsicht gesehen, auf solche Weise in einer Kurve liegen, daß der Abstand zwischen den Achsen von der langgestreckten Zone mit einer Abnahme des Abstandes der Achsen vom Drückteil (14) zunimmt.
  10. Band-Heißwalzwerk nach einem der Ansprüche 6 bis 9, bei dem die zwei in Längsrichtung voneinander beabstandeten Positionen, an denen die Angriffseinrichtung (12, 13) an den Kanten des Erzeugnisses angreift, in Längsrichtung um einen Abstand voneinander beabstandet sind, der größer als der Längsabstand entlang der genannten Zone zwischen dem Drückteil (14) und der daran näherliegenden (13) der zwei in Längsrichtung voneinander beabstandeten Positionen ist.
EP19910300920 1990-02-13 1991-02-05 Verfahren und Vorrichtung zur Korrektur einer Biegung in Breitenrichtung im Endbereich eines warmgewalzten, plattenförmigen Produktes Expired - Lifetime EP0442645B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3179490A JPH03234318A (ja) 1990-02-13 1990-02-13 熱延板先端曲がりの矯正方法および装置
JP31794/90 1990-02-13

Publications (3)

Publication Number Publication Date
EP0442645A2 EP0442645A2 (de) 1991-08-21
EP0442645A3 EP0442645A3 (en) 1992-02-05
EP0442645B1 true EP0442645B1 (de) 1994-11-30

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EP (1) EP0442645B1 (de)
JP (1) JPH03234318A (de)
DE (1) DE69105291T2 (de)

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Publication number Priority date Publication date Assignee Title
DE4227842C2 (de) * 1992-08-20 1997-01-23 Mannesmann Ag Walzgutführung
CN104289520B (zh) * 2014-09-30 2017-05-03 巢湖广丰金属制品有限公司 一种带钢表面形变整形设备
CN108971238B (zh) * 2018-09-25 2024-03-22 湖州永兴特种不锈钢有限公司 一种轧机导槽
DE102020206297A1 (de) * 2019-09-19 2021-03-25 Sms Group Gmbh Zwischengerüstführung an einem Vertikalwalzgerüst einer Walzstraße sowie Verfahren zur Führung des Walzgutes unter Verwendung der Zwischengerüstführung
CN111744959B (zh) * 2020-07-08 2022-06-21 马鞍山钢铁股份有限公司 一种冷轧带钢卷曲溢出边自动控制装置及方法
CN112207153B (zh) * 2020-10-23 2022-11-29 济南森峰激光科技股份有限公司 一种校平装置及校平方法

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DE1527964A1 (de) * 1966-08-31 1970-03-05 Eisenbau Kraemer Mbh Verfahren und Vorrichtung zum Kaltbiegen bzw. Kaltrichten von metallischen Baendern
US3854315A (en) * 1973-12-28 1974-12-17 Interlake Inc Variable width strip conditioner
DD211293A1 (de) * 1982-11-08 1984-07-11 Bautzen Waggonbau Veb Vorrichtung zum richten von blechstreifen

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DE69105291D1 (de) 1995-01-12
EP0442645A3 (en) 1992-02-05
EP0442645A2 (de) 1991-08-21
DE69105291T2 (de) 1995-04-06
JPH03234318A (ja) 1991-10-18

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