EP0470512B1 - Procédé pour dresser des rubans métalliques en courant - Google Patents

Procédé pour dresser des rubans métalliques en courant Download PDF

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Publication number
EP0470512B1
EP0470512B1 EP91112996A EP91112996A EP0470512B1 EP 0470512 B1 EP0470512 B1 EP 0470512B1 EP 91112996 A EP91112996 A EP 91112996A EP 91112996 A EP91112996 A EP 91112996A EP 0470512 B1 EP0470512 B1 EP 0470512B1
Authority
EP
European Patent Office
Prior art keywords
tensile
strip
bending
stressing
stretching
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.)
Revoked
Application number
EP91112996A
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German (de)
English (en)
Other versions
EP0470512A3 (en
EP0470512A2 (fr
Inventor
Karl Lefor
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.)
Sundwiger Eisenhuette Maschinenfabrik GmbH and Co
Original Assignee
Sundwiger Eisenhuette Maschinenfabrik GmbH and Co
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 Sundwiger Eisenhuette Maschinenfabrik GmbH and Co filed Critical Sundwiger Eisenhuette Maschinenfabrik GmbH and Co
Publication of EP0470512A2 publication Critical patent/EP0470512A2/fr
Publication of EP0470512A3 publication Critical patent/EP0470512A3/de
Application granted granted Critical
Publication of EP0470512B1 publication Critical patent/EP0470512B1/fr
Anticipated expiration legal-status Critical
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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
    • B21D1/05—Stretching combined with rolling

Definitions

  • Metal strips the thickness of which has been reduced to less than 5 mm by repeated rolling, are not flat. They are wavy and have bumps. For this reason, they are often not suitable for further processing. Therefore, such tapes are subjected to a straightening process.
  • straightening and stretch-bending straightening.
  • the strip is subjected to a tensile stress at which its yield strength is exceeded, so that the strip is plastically deformed, namely elongated.
  • stretch bending straightening the strip is subjected to tensile stress and bent several times in opposite directions under tension. The yield stress in the area of the mutual bending is also exceeded and the strip is permanently elongated.
  • the desired lengthening of the tape thus takes place on the contact sheet of the tensioning rollers, namely immediately before the point of deceleration of the braking roller or immediately after the point of impact of the pulling roller, because the tension introduced into the tape is higher at these points than in the actual train path, since here the a tensile stress generated by the tensioning rollers is superimposed on a bending tension which is dependent on the roller diameter, that is to say is added to this.
  • tensioning rollers of this type practically always have a rubber coating, a defect that does not correspond to the internal tension of the strip to be straightened is generated by imperfections in the rubber coating, different layer thicknesses and uneven wear of the coating and changing rubber coating properties in the strip. The result is a tape that has significant residual stresses and thus flatness errors due to the large number of imponderables shown.
  • the object of the invention is to develop a method which avoids the disadvantages mentioned above and with which not only a flat belt can be produced, but also a permanent flatness is achieved due to the treatment of the belt.
  • This object is achieved procedurally in that the metal strip is subjected to tensile bending twice in one pass with different tensile stress, in that the bending deformation in the first tensile bending process is greater than in the second tensile bending process and in that the tensile stress in the second tensile bending process is at least 50% of the stretching limit stress of the strip and is substantially larger than the tensile stress during the first stretch bending process.
  • the invention involves two tensile bending under different conditions. It has been shown that under the different tensile bending conditions during the first and second tensile bending processes, the band leaving the second tensile bending section is absolutely flat and not because of it the curvature awarded in the prior art has tensile bending treatment. This effect is due to the fact that in the second tension bending process the desired plastic deformation of the strip using the usual means for bending, such as roller straighteners with small radii of curvature of the straightening rollers, can be carried out much more precisely than in a pure stretching stretch. It is surprising that in this way not only the desired flatness of the tape is maintained, but this flatness is also maintained permanently.
  • the strip should preferably be lengthened differently in the two tension bending sections, in particular in the first tension bending section being stretched more than in the second tension bending section.
  • the device has two tensile bending sections 2-5 arranged one behind the other in the direction of travel of a strip B to be straightened.
  • the belt B arrives via a pair of S-rollers 1, 1 'in the first tension bending section 2 and via a further driven S-pair of rollers 4.4' in the second tension bending section 5 and from here via a third driven S-roller pair 7,7 'to a reel, not shown.
  • the drives of the S-roller pairs 1.1 ', 4.4', 7.7 ' are tension-controlled or degree of stretch-regulated.
  • a roller straightening apparatus 3, 6, whose straightening rollers, which have a small radius of curvature, bend the continuous strip B several times in the opposite direction, is arranged in each train bending section 2, 5.
  • the band B is subjected to a strong bending deformation and a weak tensile stress in the first tensile bending section 2 and a strong tensile stress and a weak bending deformation in the second tensile bending section 5.
  • the tensile stress is 20 to 50% and in the second tensile bending section 5, 50 to 90% of the yield stress of the strip B.
  • a bending stress is superimposed on the tension by adjusting the straightening rollers of the bending straighteners 3.6 , which leads to the desired elongation of the band. So that the tension can be set independently of one another in both tension bending sections 2.5, the pair of S-rollers 4, 4 'is driven and therefore has a decoupling effect on both tension bending sections 2.5.

Landscapes

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

Claims (5)

  1. Procédé pour le dressage de bandes de métal exclusivement par dressage par traction et flexion de la bande (B) de métal, en appliquant à celle-ci des efforts de traction différents, en une passe, où la déformation par flexion, créée lors de la première opération de traction et de flexion, est supérieure à celle de la deuxième opération de traction et de flexion, et où l'effort de traction mis en oeuvre à la deuxième opération de traction-flexion représente au moins 50 % de la tension limite d'étirage de la bande et est supérieur à l'effort de traction mis en oeuvre à la première opération de traction-flexion.
  2. Procédé selon la revendication 1, caractérisé en ce que l'effort de traction mis en oeuvre lors de la première opération de traction-flexion représente 20 à 50 % de la tension limite d'étirage de la bande.
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que l'effort de traction mis en oeuvre lors de la deuxième opération de traction-flexion est inférieur à 90% de la tension limite d'étirage de la bande.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la bande (B) est pliée dans le même sens à l'entrée et à la sortie d'un train de traction-flexion.
  5. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la bande (B) est pliée en sens inverse à l'entrée et à la sortie d'un train de traction-flexion, notamment à l'entrée et à la sortie du deuxième train de traction-flexion.
EP91112996A 1990-08-04 1991-08-02 Procédé pour dresser des rubans métalliques en courant Revoked EP0470512B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4024794A DE4024794C2 (de) 1990-08-04 1990-08-04 Verfahren zum Richten von Metallbändern
DE4024794 1990-08-04

Publications (3)

Publication Number Publication Date
EP0470512A2 EP0470512A2 (fr) 1992-02-12
EP0470512A3 EP0470512A3 (en) 1992-04-08
EP0470512B1 true EP0470512B1 (fr) 1993-12-15

Family

ID=6411656

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91112996A Revoked EP0470512B1 (fr) 1990-08-04 1991-08-02 Procédé pour dresser des rubans métalliques en courant

Country Status (4)

Country Link
US (1) US5161400A (fr)
EP (1) EP0470512B1 (fr)
JP (1) JPH04262823A (fr)
DE (2) DE4024794C2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124800C2 (de) * 1991-07-26 1994-06-23 Bwg Bergwerk Walzwerk Verfahren zum Behandeln von Metallbändern
EP0826437A4 (fr) * 1996-03-18 2001-04-11 Nippon Steel Corp Procede de laminage en tandem a froid et laminoir en tandem a froid
JP3590288B2 (ja) * 1999-02-15 2004-11-17 住友重機械工業株式会社 帯板のレベリング方法およびレベリング装置
JP2001347318A (ja) * 2000-06-08 2001-12-18 Mitsubishi Heavy Ind Ltd 板幅調整装置及び板幅調整方法
JP4562152B2 (ja) * 2000-07-11 2010-10-13 キヤノン株式会社 基板処理方法
DE102016121448B4 (de) 2016-11-09 2018-08-30 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Verfahren und Vorrichtung zum Streckbiegerichten eines Metallbandes
CN116921498B (zh) * 2023-09-18 2024-01-09 新乡巴山航空材料有限公司 一种适用于平整高目数金属丝编织网径向打卷的装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1219967A (en) * 1968-04-30 1971-01-20 Head Wrightson & Co Ltd Improvements in the processing of strip metal
DE2350503B1 (de) * 1973-10-08 1975-01-23 Bwg Bergwerk Walzwerk Verfahren und Vorrichtung zum Entzundern und Planieren von Blechbaendern
GB2174027B (en) * 1985-04-20 1988-07-13 Bwg Bergwerk Walzwerk Process and equipment for continuous flattening of particularly thin metal strip
DE3525343C1 (de) * 1985-04-20 1986-12-11 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh, 4100 Duisburg Verfahren und Vorrichtung zum Kontinuierlichen Richten von Metallbändern
FR2617744B1 (fr) * 1987-07-08 1994-05-20 Clecim Procede et installation de planage d'une bande metallique

Also Published As

Publication number Publication date
US5161400A (en) 1992-11-10
EP0470512A3 (en) 1992-04-08
EP0470512A2 (fr) 1992-02-12
DE4024794C2 (de) 1993-11-25
JPH04262823A (ja) 1992-09-18
DE59100726D1 (de) 1994-01-27
DE4024794A1 (de) 1992-02-06

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