EP2585236A1 - Installation de dressage par traction et flexion - Google Patents

Installation de dressage par traction et flexion

Info

Publication number
EP2585236A1
EP2585236A1 EP11729095.7A EP11729095A EP2585236A1 EP 2585236 A1 EP2585236 A1 EP 2585236A1 EP 11729095 A EP11729095 A EP 11729095A EP 2585236 A1 EP2585236 A1 EP 2585236A1
Authority
EP
European Patent Office
Prior art keywords
roller
straightening
rollers
tape
deflection
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
Application number
EP11729095.7A
Other languages
German (de)
English (en)
Other versions
EP2585236B1 (fr
Inventor
Andreas Noé
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.)
Redex SA
Original Assignee
BWG Bergwerk und Walzwerk Maschinenbau GmbH
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
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Application filed by BWG Bergwerk und Walzwerk Maschinenbau GmbH filed Critical BWG Bergwerk und Walzwerk Maschinenbau GmbH
Publication of EP2585236A1 publication Critical patent/EP2585236A1/fr
Application granted granted Critical
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Active legal-status Critical Current
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Links

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
    • B21D1/05—Stretching combined with rolling
    • 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
    • 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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging
    • B21D41/026—Enlarging by means of mandrels
    • 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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging
    • B21D41/026—Enlarging by means of mandrels
    • B21D41/028—Enlarging by means of mandrels expandable mandrels

Definitions

  • the invention relates to a method and a system for stretch bending of metal strips, with a plurality of (horizontal or wesentl Ien horizontal) tape passage direction arranged one behind the other and spaced in the tape passage direction straightening rollers, which is under a tensile stress below the elastic limit band around the straightening rollers alternately bent and thereby undergoes a plastic stretching, wherein one or more adjustable relative to the belt straightening rollers each precedes a deflection roller, which has a larger diameter than the respective downstream straightening roller.
  • the band is usually under a tensile stress below the elastic limit or yield strength and the band is alternately bent around the straightening rollers in the plastic or elastic-plastic region.
  • the plastically or elastically-plastically acting straightening rollers are also referred to as stretch rollers.
  • the extent to which the tape is stretched plastically (in total) and thus elongated is called the degree of stretching.
  • Unplanarity means, for example, waviness and / or banding due to length differences of the band fibers in the band plane.
  • unevenness also means strip curvatures in the longitudinal and / or transverse direction, which arise as a result of bending moments in the strip, for example if the strip has been elastically plastically bent around deflection rollers or by elastic-plastic deformations during winding of the strip. Longitudinal bends are also possible.
  • the unplane band is bent around rollers of sufficiently small diameter (mutual side) under a tensile stress which lies below the elastic limit RE or the technical elastic limit R p o, oi of the band material, so that the Overlaying the tensile stress with the bend produces an elastic / plastic deformation in the band.
  • the strip is elongated plastically, the height of the plastic elongation being called the degree of stretching.
  • the originally short ribbon fibers are elongated relatively more strongly.
  • all strapping fibers have the same length after straightening, so that basically an ideal strapping should be free of undulations or bandsaw.
  • EP 0 298 852 B1 (or DE 38 85 019 T2) discloses a device for straightening a metallic strip, in which a plurality between a run-in tensioning roller set and a run-out tensioning roller set
  • Stretch bending rollers are arranged. At various points of the system pulleys can be provided, which serve primarily to guide the band in its passage through the system over a certain way.
  • the invention is therefore based on the technical problem of providing a method for stretch bending and a stretch bending device of the type described above, with which or with which unevenness can be eliminated particularly reliably and efficiently.
  • the invention teaches in a generic method for stretch bending of metal bands of the type described above, that the straightening roller is employed for varying the depth of immersion so relative to the associated guide roller, that the free tape length between the discharge point of the belt from the guide roller to the Run-up point of the band on the straightening roller does not exceed a predetermined maximum value, above which the longitudinal undulations of the band form.
  • the straightening roller for varying the depth of immersion is adjusted relative to the deflection roller such that the free belt length does not exceed a maximum value of 8% of the (maximum) bandwidth, preferably 4% of the (maximum) bandwidth.
  • the free tape length does not exceed a maximum value of 150 mm, preferably 100 mm, particularly preferably 70 mm.
  • the invention is initially based on the knowledge that in a conventional stretch bending stage in a first plant section with multiple straightening rolls primarily the degree of stretching is generated and that in a second plant section with other straightening rollers substantially the residual bending moments are eliminated. Furthermore, the invention is based on the recognition that it is expedient, at least in the first plant section with the straightening rollers, with which the degree of stretching is generated in the first place, to assign deflection rollers to the straightening rollers. Practical investigations as well as theoretical calculations according to the finite element method (FEM) have shown that the straightening result for a given band depends on the number and geometrical arrangement of straightening rollers among themselves and between straightening rollers and deflection rollers.
  • FEM finite element method
  • this long-wave-strength is impressed plastically in the band, so that the directional result is negatively influenced.
  • Such an effect occurs mainly on straightening rollers on which the belt is still noticeably elongated plastically.
  • this elastic longitudinal ripple plays no or only a minor role.
  • the straightening roller is preferably set at different insertion depths or wrap angles in such a way
  • the stretch bending machine is designed so that the formation of longitudinal corrugations is avoided over the entire setting range.
  • This succeeds in conventional employment of the straightening roll vertically or approximately vertically to the tape passage direction when the distance of the straightening roller to the guide roller is low, and so small that the free tape length over the entire adjustment always remains below the maximum value or the maximum value not below. It may therefore be expedient to arrange the straightening roller relatively close behind the deflection roller or to arrange the deflection roller relatively close in front of the straightening roller, so that the free belt lengths are minimized even with conventional employment.
  • the available adjustment range for the wrap angle or the immersion depth is relatively low in this approach.
  • the invention therefore proposes that the straightening roller can be moved substantially along the circumferential direction of the deflection rollers or tangentially to the deflection roller in the course of the variations of the immersion depth.
  • the free tape length is kept to a minimum, even if a relatively large distance between the guide roller and the straightening roller is established.
  • Such a large distance ensures that the immersion depth or the wrap angle can be varied over a wide range.
  • the free tape length is always minimized due to the particularly preferred Anstellart so that longitudinal undulations can be avoided.
  • Anstellbahn is moved, preferably relative to a fixedly arranged deflection roller.
  • the employment on an oblique Anstellbahn has over the conventional "vertical" employment the advantage that the straightening roller moves in the course of employment as it were tangential along the surface of the guide roller, so that the free length of tape remains relatively small, even with relatively large variations the immersion depth.
  • the straightening roller in the sense of a pivoting position on an arcuate, for example, circular positioning track, this arcuate or circular positioning track surrounding the outer circumference of the deflection roller.
  • the deflection roller can also be arranged stationary in this case.
  • Such a pivoting position on an arcuate trajectory surrounding the deflection roller also leads to only slight differences in the free belt length occurring at different angles of wrap and the free belt length always remains below the desired limit above which longitudinal ripples between deflection roller and straightening roller would occur.
  • the free tape lengths can also be minimized by not only the straightening roller being moved relative to the deflection roller, but also by the straightening roller and the associated deflection roller being moved in a suitable manner.
  • the pulleys have a much larger diameter than the straightening rollers, because the pulleys should only have an elastic effect. It is therefore expedient if the diameter of the deflection rollers is greater than the diameter of the respective associated straightening roller by at least a factor of 5, preferably at least a factor of 8. Thus, it may be expedient if the diameter of the deflection roller is about a factor 10 greater than the diameter of the respective associated straightening roller.
  • the diameter of the straightening roller (s) is preferably up to 70 mm, for example up to 50 mm.
  • the diameter of the straightening roller or the straightening rollers for example, 15 mm to 70 mm, preferably 25 mm to 50 mm.
  • the diameter of the deflection roller or the deflection rollers is preferably at least 150 mm, more preferably at least 250 mm. So kan n the diameter of a pulley or more pulleys or all pulleys, for example, 150 mm to 700 mm, preferably 250 mm to 600 mm.
  • the wrap angle of the band around one or more straightening rollers or around the straightening rollers is usually 2 ° to 45 °, preferably 3 ° to 30 °.
  • roller combinations each having a guide roller and an associated straightening roller.
  • two such roller combinations are provided, more preferably three roller combinations.
  • each Richtrol le actually l I also assigned a vorge Neten U mlen kroll.
  • the described roller combinations are provided from each guide roller and straightening roller in a first Anlagenabschn ity, in which at least 75%, preferably at least 95% of the total plastic elongation of the belt are generated.
  • roller combinations are preferably arranged in the (front) first plant section, in which at least 75%, preferably at least 95%, of the plastic elongation of the belt is generated.
  • a (rear) second plant section in which the residual curvatures in the strip are minimized after straightening or adjusted to desired values, and as a rule only up to 25%, preferably only Up to 5% of the plastic elongation are generated, only one or more straightening rollers are provided, which can be dispensed with assigned pulleys in this area.
  • the first plant section has two or three roller combinations of each straightening roller and upstream deflection roller with the described Anstellux.
  • the second plant section for the residual curvature correction then has at least two individually position-controlled leveling rolls, wherein
  • this area can be dispensed with pulleys.
  • pulleys are provided in the region of this second section of the plant.
  • the described roller combinations with short free tape length can also be followed by a multiroll set.
  • the invention also relates to a stretch bending apparatus for stretch bending of metal strips with a method of the type described. Reference is made to the claims and also to the description of the figures.
  • Fig. 3 shows a third embodiment of the invention
  • Fig. 4 shows a fourth embodiment of the invention.
  • a stretch bending machine for stretch bending of metal strips 1 is shown in each case.
  • Such a stretch bending apparatus has in its basic structure an inlet tensioning roller set 2 and a outlet tensioning roller set 3 and between these tensioning roller sets 2, 3
  • the inlet tensioning roller set 2 with the tensioning rollers 4 can be designed as a brake roller set, while the outlet tensioning roller set 3 can be designed with the tensioning rollers 4 as a tensioning roller set.
  • the tape passage direction D is horizontal or substantially horizontally horizontal.
  • each straightening roller 5a, 6a, 7a, 8a can in principle be supported in a manner known per se by at least two support rollers. These are not shown in the figures.
  • the individual straightening rollers 5a, 6a, 7a and 8a can be adjusted relative to the belt in order to adapt the process control to a wide variety of conditions, so that the immersion depth of the straightening roller 5a, 6a, 7a, 8a and thus also the wrap angle of the belt around the straightening roller can be varied. It can also be seen in the figures that deflecting rollers 5b, 6b, 7b are assigned to some of the straightening rollers.
  • Fig. 1 shows in a schematically simplified manner a stretch bending plant in a first embodiment. It is first of all recognizable that stretch bending jigs with a plurality of straightening rollers 5a-8a generally consist of a first section A1 and a second section A2, wherein a plurality of straightening rollers 5a, 6a are provided in the first section A1, which essentially produces the degree of stretching becomes. In the second plant section A2 a plurality of straightening rollers 7a, 8a are also provided, with which the
  • the deflection rollers 5b and 6b are now associated with the straightening rollers 5a and 6a, wherein each straightening roller 5a, 6a is respectively preceded by a deflection roller 5b, 6b.
  • the deflection rollers 5b, 6b have a substantially larger diameter than the straightening rollers 5a, 6a, so that the deflection rollers 5b, 6b essentially act only elastically.
  • Fig. 1 can be seen that varies in the course of the variation of the immersion depth, the free tape length F between the run-off point 9 of the tape from the guide roller to the casserole point 10 of the tape on the straightening roller.
  • the free length of tape F can now be minimized even in this conventional employment, namely, if the straightening roller 5a and 6a is arranged relatively close behind the associated guide roller 5b and 6b and therefore if the distance A relative to the tape passage direction D is kept relatively small. Then, even with conventional employment of the straightening rollers 5a and 6a shown in FIG. 1, the free path F is very small, so that the formation of longitudinal corrugations is avoided.
  • FIGS. 2, 3 and 4 show a preferred embodiment in which the free length of tape can also be varied over a large adjustment range of the wrap angle.
  • the straightening rollers 5a, 6a and 7a are now employed for varying the immersion depth relative to the associated deflection roller, that the free tape length F between the discharge point 9 of the band from the deflection roller to the casserole point 10 of the band remains as small as possible on the associated straightening roller and does not exceed a predetermined maximum value.
  • the straightening rollers or some of the straightening rollers in the course of the variation of the immersion depth substantially along the circumferential direction of the deflection rollers or tangentially to the deflection rollers can be moved. This can be realized constructively in various ways.
  • FIGS. 2, 3, 4 show three different possibilities. Run-off point 9, run-up point 10 and free tape length F are not explicitly shown in FIGS. 2, 3 and 4, but the definition results from FIG. 1 and the corresponding explanations.
  • Fig. 2 shows an example of the three different possibilities of employment for the individual straightening rollers.
  • the possibility is shown of moving the straightening roller 5a in the sense of a pivoting position on an arcuate and in the exemplary embodiment circular setting path 12.
  • the Anstellbahn 12 surrounds in the embodiment according to the invention shown in FIG. 2, the outer periphery of the guide roller 5b, which may be arranged stationary in the embodiment.
  • the straightening roller 5a is moved in the course of the variation of the immersion depth over a relatively wide setting path so that always a minimum free belt length F is maintained.
  • this straightening roller 6a is linearly movable in the sense of a linear adjustment.
  • the straightening roller 6a is linearly movable on an inclined to the tape passage direction D Anstellbahn 1 1.
  • the deflection roller 6b can in turn be arranged stationary.
  • FIG. 2 shows that in this way a substantially tangential positioning track 11 is realized, so that a minimization of the free belt length F remains intact over relatively wide positioning paths.
  • both the straightening roller 7a and the guide roller 7b are movable, in different directions.
  • the straightening roller 7a is movable transversely to the tape passage direction D in the sense of a vertical adjustment
  • the associated deflection roller 7b is movable horizontally along the tape passage direction D and consequently horizontally. By combined movement, the free tape lengths F can also be minimized.
  • Fig.2 is intended to illustrate in particular the various Anstellilia, so that there the employment according to the invention for all straightening rollers 5a, 6a and 7a is shown.
  • FIG. 3 again shows a stretch bending machine with four straightening rollers 5a, 6a, 7a and 8a. At least the first two straightening rollers 5a, 6a are each assigned a deflection roller 5b or 6b, which is provided with the employment according to the invention. In the embodiment of FIG. 3, the Schräganwolf described is realized. In contrast, for the two straightening rollers 7a, 8a in
  • second plant section A2 provided a conventional vertical adjustment. Because as already explained, the problem of long-wave before the straightening roll occurs primarily on the straightening rollers on which the belt is still noticeably elongated plastic. For the last straightening rollers, with which essentially only a partially plastic residual curvature correction is operated, the elastic longitudinal ripple only plays a subordinate role. In this respect, in the region of the straightening rollers 7a, 8a, the deflection rollers according to the invention or the adjustment of the straightening rollers according to the invention relative to the deflection rollers can be dispensed with. The residual curvature correction is thus carried out by at least the two straightening rollers 7a and 8a, which are carried out individually position-controlled.
  • Fig. 4 shows an alternative embodiment of the invention, in which the two straightening rollers 5a and 6a, which are associated with respective guide rollers 5b and 6b, a total multi-roll night unit 15 is arranged downstream. With this multi-roll unit, the remaining curvature corrections can be carried out.
  • This Dahlrollennchtiata 15 may have stationary lower rollers and adjustable upper rollers. This is merely indicated in FIG. 4.
  • FIGS. 3 and 4 show embodiments in which corresponding deflection rollers 5b, 6b are arranged upstream of only the first two straightening rollers 5a, 6a.
  • This embodiment is not shown in Figs. 3 and 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Moulding By Coating Moulds (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé et une installation pour le dressage par traction et flexion de bandes métalliques (1), comportant plusieurs galets de dressage (5a, 6a, 7a, 8a) disposés les uns derrière les autres dans le sens de défilement de la bande (D) et à distance les uns des autres dans le sens de défilement de la bande (D). La la bande (1), soumise à une tension de traction inférieure à la limite d'élasticité, est cintrée alternativement autour des galets de dressage (5a, 6a, 7a, 8a) et subit à cette occasion un étirage plastique. Une poulie de guidage (5b, 6b, 7b) est montée respectivement en amont d'un ou de plusieurs galets de dressage (5a, 6a, 7a), réglables par rapport à la bande (1), chaque poulie de guidage ayant un diamètre supérieur à celui du galet de dressage situé respectivement en aval. Ledit procédé et ladite installation sont caractérisés par le fait que, pour faire varier la profondeur de pénétration, le galet de dressage (5a, 6a, 7a) est réglable par rapport à la poulie de guidage (5b, 6b, 7b) associée, de telle sorte que la longueur de bande (F) libre entre le point de sortie (9) de la bande (1) de la poulie de guidage jusqu'au point d'entrée (10) de la bande (1) sur le galet de dressage associé ne dépasse pas une valeur maximale prédéfinie au-delà de laquelle des ondulations longitudinales se forment dans la bande. De plus, l'installation est configurée de préférence de telle sorte que pendant la variation de la profondeur de pénétration ou de l'angle d'enroulement, la longueur de bande libre ne dépasse jamais la valeur maximale sur la totalité de la zone de réglage.
EP11729095.7A 2010-06-23 2011-06-22 Procédé de dressage par traction et flexion Active EP2585236B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010024714.6A DE102010024714C5 (de) 2010-06-23 2010-06-23 Verfahren zum Streckbiegerichten von Metallbändern und Streckbiegerichtanlage
PCT/EP2011/060394 WO2011161134A1 (fr) 2010-06-23 2011-06-22 Installation de dressage par traction et flexion

Publications (2)

Publication Number Publication Date
EP2585236A1 true EP2585236A1 (fr) 2013-05-01
EP2585236B1 EP2585236B1 (fr) 2022-07-20

Family

ID=44627820

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11729095.7A Active EP2585236B1 (fr) 2010-06-23 2011-06-22 Procédé de dressage par traction et flexion

Country Status (7)

Country Link
US (1) US9174257B2 (fr)
EP (1) EP2585236B1 (fr)
KR (1) KR101851028B1 (fr)
CN (1) CN102971096B (fr)
DE (1) DE102010024714C5 (fr)
RU (1) RU2528528C2 (fr)
WO (1) WO2011161134A1 (fr)

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DE102013106243C5 (de) * 2013-06-14 2018-10-04 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Verfahren und Vorrichtung zum Streckbiegerichten von Metallbändern
US11076664B1 (en) 2014-09-22 2021-08-03 Apple Inc. Fabric cases for electronic devices
CN105290110B (zh) * 2015-12-04 2018-03-13 中冶南方工程技术有限公司 冷硬带钢复合矫直机
DE102016106208A1 (de) * 2016-04-05 2017-10-05 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Verfahren zum Streckbiegerichten eines Bandes
DE102016121448B4 (de) * 2016-11-09 2018-08-30 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Verfahren und Vorrichtung zum Streckbiegerichten eines Metallbandes
CN112496088B (zh) * 2020-11-18 2022-04-12 山东钢铁集团日照有限公司 一种零延伸率拉矫改善镀锌板c翘板形的控制方法
CN115365326B (zh) * 2022-09-21 2025-04-08 中冶南方工程技术有限公司 一种用于矫直金属板带的拉矫机

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Also Published As

Publication number Publication date
DE102010024714A1 (de) 2011-12-29
EP2585236B1 (fr) 2022-07-20
CN102971096A (zh) 2013-03-13
KR101851028B1 (ko) 2018-04-20
US9174257B2 (en) 2015-11-03
KR20130041132A (ko) 2013-04-24
DE102010024714C5 (de) 2018-10-18
US20130111962A1 (en) 2013-05-09
WO2011161134A1 (fr) 2011-12-29
DE102010024714B4 (de) 2014-09-25
CN102971096B (zh) 2015-02-04
RU2528528C2 (ru) 2014-09-20
RU2013102863A (ru) 2014-07-27

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