EP2119514B1 - Verfahren Richten eines Metallbandes - Google Patents

Verfahren Richten eines Metallbandes Download PDF

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Publication number
EP2119514B1
EP2119514B1 EP09006260.5A EP09006260A EP2119514B1 EP 2119514 B1 EP2119514 B1 EP 2119514B1 EP 09006260 A EP09006260 A EP 09006260A EP 2119514 B1 EP2119514 B1 EP 2119514B1
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EP
European Patent Office
Prior art keywords
levelling
strip
straightening
roll
diameter
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Active
Application number
EP09006260.5A
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German (de)
English (en)
French (fr)
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EP2119514A1 (de
Inventor
Andreas Dipl. -Ing. 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.)
BWG Bergwerk und Walzwerk Maschinenbau GmbH
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BWG Bergwerk und Walzwerk Maschinenbau GmbH
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Application filed by BWG Bergwerk und Walzwerk Maschinenbau GmbH filed Critical BWG Bergwerk und Walzwerk Maschinenbau GmbH
Publication of EP2119514A1 publication Critical patent/EP2119514A1/de
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    • 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
    • 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

Definitions

  • the invention relates to a method for straightening a metal strip, in particular a thin metal strip having a thickness up to 1 mm, wherein in the metal strip between a brake roller set and a Werrollensatz a tensile stress of at least 70% of the yield strength is generated, and wherein the band between the brake roller set and the Werrollensatz is directed in a straightening roller group with multiple straightening rollers.
  • - Metal strip means in the context of the invention, in particular a thin metal strip having a thickness of 0.02 mm to 1.0 mm, preferably 0.05 mm to 0.5 mm.
  • the aim of straightening a metal band is to produce a band that is as flat as possible.
  • band ripples and banding which are due to differences in length across the band, band bends often occur, with a distinction being made between longitudinal bends (coil set) and cross bends.
  • the straightening of ribbons is often done using strip tension, e.g. B. when drafting or stretch bending.
  • the diameter of the access rollers is 1500 times greater than the maximum strip thickness (see. DE 39 12 676 C2 ).
  • the vibrations can be sufficiently damped by the use of a spray liquid, but then the spray liquid is to be removed again by way of a belt cleaning, which is associated with increased equipment and operating costs. Furthermore, the position of the correction roller must be readjusted for each band thickness / band material combination.
  • tapes are often planed in practice by means of stretch bending.
  • the tape is bent around a number of straightening rollers with a small diameter and lengthened by overlapping of bending and strip tension plastically by the degree of stretching, so that ripples (approximately) are eliminated.
  • the last straightening rollers are mainly used for the curvature correction.
  • the strip assumes the roll diameter at the first straightening rollers or not.
  • the roll diameters are not accepted, since optimum ribbons of curvature must be set over the wrap angles for different ribbons. For this reason, at least the last straightening rollers are employed differently for different bands. This often results in high commissioning effort in practice. Incidentally, the disadvantage is again the use of relatively small roll diameter.
  • EP 1 311 354 B1 a method and an apparatus for stretch straightening a metal strip, wherein the metal strip passes through a brake roller and a Werrollensatz and is subjected to a stretch between the two sets of rollers in the course of its stretching and arranged in a between the brake roller and the Werrollensatz further set of rollers to increase the degree of stretching of a bend Train is subjected. With this further set of rollers while the main part of the stretch train is generated.
  • the traction rollers of the intermediate roller set can have a different diameter than the rollers of the brake roller set and the Werrollensatzes.
  • the inner traction rollers of this central roller set can have a smaller diameter compared to the rollers of the brake roller set and the Werrollensatzes.
  • the invention has for its object to provide a method for straightening a metal strip and in particular a thin metal strip, which can produce low-residual bands high flatness and beyond lesser longitudinal curvatures in an economical manner.
  • the invention teaches a method for straightening a metal strip, in particular a thin metal strip according to claim 1.
  • the longitudinal curvatures are corrected in the intermediate straightening roller group preferably by alternating bending of the belt exclusively around straightening rollers of sufficiently large diameter and with sufficiently large wrap, so that the band assumes the curvature of the rollers. Since the strip follows the curvature of the rolls, a variation of the depth of immersion has no influence on the directional result. It is in the context of the invention therefore particularly important that the position of the straightening rollers and consequently the immersion depth of a straightening roller between two adjacent straightening rollers of the straightening roller group is fixed and is not changed during the straightening of a band and / or straightening bands of different thickness.
  • All straightening rollers according to the invention have a diameter which is at least 500 times, z. B. is at least 1000 times the thickness of the band to be straightened and preferably also the maximum thickness of a straightening in such a system band.
  • the tension between the brake roller set and Werrollensatz is set according to the invention to at least 75%, more preferably at least 85% of the yield strength.
  • the tension may be adjusted to a value of 90% of the yield strength or more.
  • the tensile stress may be below the yield strength, but also in the range of the yield strength or above the yield strength.
  • Yield strength means in the context of the invention, the yield strength or plastic yield strength R p 0.2 , that is the stress in the pure tensile test, in which the plastic strain is 0.2%. It is therefore within the scope of the invention that between the brake roller set and Werrollensatz straightening the band by plastic strain, z. B. by stretching and / or stretch bending takes place, but the curvature correction is done by alternating bending around the straightening rollers of the straightening roller group.
  • the diameter of the straightening rollers of the straightening roller group increases from roll to roll, preferably by a factor of 1.05 to 1.5, more preferably by a factor of 1.15 to 1.3. You can work with a fixed factor or a variable factor within a straightening roller group.
  • the number of straightening rolls or curvature correction rolls and their diameter graduation is particularly preferably calculated according to a mathematical model which uses as input parameters the strip thickness, the modulus of elasticity, the transverse contraction number, the stress-strain curves, the required degree of stretch to eliminate the waviness, which increases expected variations in strip tension, the expected variations in strength (within a product), the expected band thickness variations (within a product) and / or the amount of the maximum allowable longitudinal residual curvature.
  • the mathematical model then calculates the necessary for different bands starting from a role configuration Strip tensile stresses and the resulting longitudinal residual curvatures.
  • the required number of curvature correction rollers and the optimum gradation of the roller diameters are based on the smallest strip thickness at which a certain longitudinal residual curvature still has to lie within the tolerance.
  • the invention proposes that the position of the straightening rollers and consequently the immersion depth of the straightening rollers between two adjacent straightening rollers within the straightening roller group in the system is fixed and especially during straightening, but also when changing the strip material and / or the strip thickness is not changed ,
  • the position of the straightening rollers and consequently the immersion depth of the straightening rollers between two adjacent straightening rollers within the straightening roller group in the system is fixed and especially during straightening, but also when changing the strip material and / or the strip thickness is not changed .
  • a diameter is chosen which also corresponds to at least 500 times (minimum) strip thickness in these additional straightening rollers.
  • These upstream additional straightening rollers are also arranged between brake roller set and Werrollensatz.
  • the invention also includes preferred embodiments in which a strip treatment in several treatment zones, for. B. several Werreckzonen, takes place, which consequently several sets of clamping rollers to form a plurality of treatment zones, for. B. Switzerlandreckzonen, are connected in series.
  • the straightening roller group according to the invention for eliminating longitudinal curvatures is then always in the last treatment zone, z. B. last Switzerlandreckzone arranged. After the correction of curvature by the straightening rollers, plastic deformation no longer takes place, so that the final result of the straightened and, in addition, longitudinally curvature-free band is maintained.
  • all straightening rollers of the straightening roller group are not driven.
  • the invention also includes embodiments in which one, several or all straightening rollers of the straightening roller group are driven. Such a possibility is, for example, then, when (very) large straightening rollers with large moments of inertia are used. By driving one or more straightening rollers, it is then possible in particular to avoid slippage when starting up the installation.
  • the inventive method can be carried out with a system for straightening a metal strip, in particular a thin metal strip having a thickness ⁇ 1 mm.
  • a system for straightening a metal strip in particular a thin metal strip having a thickness ⁇ 1 mm.
  • a system has at least one brake roller set and a Werner-on-assisted to build the desired tension and at least one arranged between the brake roller set and Werrollensatz straightening roller group with multiple straightening rollers.
  • the diameter of the straightening rollers within the straightening roller group increases in the direction of belt travel from roll to roll.
  • such a straightening roller group has at least four rollers, preferably at least five rollers.
  • the diameter of the straightening rolls is at least 500 times the (minimum) strip thickness and preferably at least 1000 times the (minimum) strip thickness.
  • the diameter of the straightening roller group increases from roll to roll by a factor of 1.05 to 1.5, preferably 1.15 to 1.3.
  • the straightening rollers in the straightening roller group have a diameter of 100 mm to 2000 mm, z. B. 200 mm to 1600 mm, preferably 300 mm to 1500 mm.
  • a system for straightening a metal strip in particular a thin metal strip 1 with a thickness d ⁇ 1 mm is shown.
  • a system has in its basic structure a brake roller set 2 and a Switzerlandrollensatz 3.
  • the brake roller set 2 only a pair of rollers and consequently two brake rollers 2.1 and 2.2
  • the Switzerlandrollensatz 3 also has only one pair of rollers and consequently two tension rollers 3.1 and 3.2.
  • the invention also includes embodiments with pulley sets with more roles, eg. B. four roles or six roles.
  • a strip tension or a tensile stress is generated in the metal strip 1 which is at least 75% of the yield strength, preferably at least 90% of the yield strength.
  • a straightening roller group 4 with a plurality of straightening rollers 4.1, 4.2, 4.3, 4.4, 4.5, 4.6 and 4.7 is arranged within the scope of the invention.
  • longitudinal curvatures of the band are eliminated by means of alternating bending.
  • the diameter D1 - D7 of the rollers of this straightening roller group 4 is relatively large and indeed so large that the band 1 follows the curvature of all of these straightening rollers within the straightening roller group 4 in the selected strip tension. It is in Fig. 1 recognizable that the diameter D1, D2, D3, D4, D5, D6, D7 of the straightening rollers 4.1 to 4.7 of the straightening roller group 4 increases in the direction of tape R from roll to roll and thus becomes larger.
  • the straightening roller group 4 has seven straightening rollers, wherein the roller diameter D1 to D7 increases from roller to roller by a factor of about 1.25. The position of the straightening rollers 4.1 to 4.7 is fixed within the system.
  • Fig. 1 a first embodiment shows, in which between the brake roller set 2 and the Buchrollensatz 3 only the straightening roller group 4 is arranged, shows Fig. 2 a modified embodiment in which the straightening roller group 4 with the straightening rollers 4.1 to 4.6 further auxiliary rollers 5.1, 5.2 and 5.3 are arranged upstream.
  • the diameter D 'of these additional rollers 5.1 to 5.3 corresponds to the diameter D1 of the first straightening roller of the straightening roller group 4th
  • Fig. 3 shows an embodiment in which the straightening rollers 4.1 to 4.7 of the straightening roller group 4 four more additional straightening rollers 5.1 to 5.4 are arranged upstream. These additional straightening rollers 5.1 to 5.4 have a relatively small diameter D 'and form as it were stretch bends. For this reason, each of these straightening rollers 5.1 to 5.4 is supported by support rollers 6. In this embodiment, the straightening roller group according to the invention is therefore preceded by a stretch bender roller group 5.1 to 5.4. Brake roller set and pull roller set are in Fig. 3 not shown.
  • the wrap angles can be made substantially larger in practice than indicated in the figures. There are wrap angles of up to 180 ° or even more conceivable.
  • the first roller 3.1 of the Buchrollensatzes 3 (at the same time) be part of the straightening roller group 4 and consequently also contribute to the plastic deformation of the belt by bending.
EP09006260.5A 2008-05-16 2009-05-08 Verfahren Richten eines Metallbandes Active EP2119514B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008024013A DE102008024013B3 (de) 2008-05-16 2008-05-16 Verfahren und Vorrichtung zum Richten eines Metallbandes

Publications (2)

Publication Number Publication Date
EP2119514A1 EP2119514A1 (de) 2009-11-18
EP2119514B1 true EP2119514B1 (de) 2013-09-04

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ID=40874269

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09006260.5A Active EP2119514B1 (de) 2008-05-16 2009-05-08 Verfahren Richten eines Metallbandes

Country Status (9)

Country Link
US (1) US8291738B2 (zh)
EP (1) EP2119514B1 (zh)
KR (1) KR101537419B1 (zh)
CN (1) CN101579707B (zh)
CA (1) CA2666007A1 (zh)
DE (1) DE102008024013B3 (zh)
ES (1) ES2434225T3 (zh)
RU (1) RU2486023C2 (zh)
ZA (1) ZA200903402B (zh)

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BR112014004180A2 (pt) * 2011-08-22 2017-03-01 Zimco Group (Proprietary) Ltd aparelho de retificação
US9486850B2 (en) * 2012-12-07 2016-11-08 Butech Bliss Roller leveler
CN103252533B (zh) * 2013-05-10 2015-04-01 成都尚明工业有限公司 金属带侧弯校直机
DE102013106243C5 (de) * 2013-06-14 2018-10-04 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Verfahren und Vorrichtung zum Streckbiegerichten von Metallbändern
CN103316964A (zh) * 2013-06-26 2013-09-25 江苏亨特宏业重工有限公司 铝带加工设备的拉弯矫直机组控制系统
CN105195559B (zh) * 2014-06-25 2017-02-22 宝山钢铁股份有限公司 厚板横向板形冷矫直方法
AT516028B1 (de) * 2014-10-20 2016-02-15 Berndorf Band Gmbh Verfahren und Vorrichtung zum Richten eines Metallbandes
US10363590B2 (en) 2015-03-19 2019-07-30 Machine Concepts, Inc. Shape correction leveler drive systems
CN105344750B (zh) * 2015-12-10 2017-10-31 北京科技大学 一种铝钢复合板异辊径矫直辊辊系结构及其辊径确定方法
CN105947749A (zh) * 2016-06-23 2016-09-21 湖南众满轮胎科技有限公司 防扎穿安全轮胎的环形链板带链块冲压的薄钢带输送机
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CN107234496B (zh) * 2017-07-26 2023-06-13 马鞍山俊强精密机械设备有限公司 一种钢带出卷装置及其使用方法和研磨机
EP3437749A1 (fr) * 2017-08-04 2019-02-06 Primetals Technologies France SAS Planeuse multi-rouleaux de bande métallique
US11904369B2 (en) * 2019-07-02 2024-02-20 Nv Bekaert Sa Apparatus and methods using the apparatus for treating metal wire
CN110378053B (zh) * 2019-07-25 2020-10-30 东北大学 管材二斜辊矫直工艺圆弧辊型最优矫直曲率的确定方法

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Also Published As

Publication number Publication date
KR20090119725A (ko) 2009-11-19
DE102008024013B3 (de) 2009-08-20
ES2434225T3 (es) 2013-12-16
CN101579707A (zh) 2009-11-18
RU2486023C2 (ru) 2013-06-27
CN101579707B (zh) 2012-02-01
US8291738B2 (en) 2012-10-23
KR101537419B1 (ko) 2015-07-16
CA2666007A1 (en) 2009-11-16
EP2119514A1 (de) 2009-11-18
RU2009118475A (ru) 2010-11-20
US20090282883A1 (en) 2009-11-19
ZA200903402B (en) 2010-05-26

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