EP2125261B1 - Apparatus and method for bending of sheets for the manufacture of tubes - Google Patents

Apparatus and method for bending of sheets for the manufacture of tubes Download PDF

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Publication number
EP2125261B1
EP2125261B1 EP08716691A EP08716691A EP2125261B1 EP 2125261 B1 EP2125261 B1 EP 2125261B1 EP 08716691 A EP08716691 A EP 08716691A EP 08716691 A EP08716691 A EP 08716691A EP 2125261 B1 EP2125261 B1 EP 2125261B1
Authority
EP
European Patent Office
Prior art keywords
forming
forming tool
roller
bending
metal sheet
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.)
Active
Application number
EP08716691A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2125261A1 (en
Inventor
Pierangelo Pasquettin
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.)
Ttengineering Srl
Original Assignee
Ttengineering Srl
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
Application filed by Ttengineering Srl filed Critical Ttengineering Srl
Priority to PL08716691T priority Critical patent/PL2125261T3/pl
Publication of EP2125261A1 publication Critical patent/EP2125261A1/en
Application granted granted Critical
Publication of EP2125261B1 publication Critical patent/EP2125261B1/en
Active legal-status Critical Current
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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers
    • B21D5/146—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers one roll being covered with deformable material
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
    • B21D5/12—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers

Definitions

  • the present invention relates to a machine and the relative procedure for bending metal sheets in a substantially cylindrical way, called ferrules, with high precision in terms of the cylindricity.
  • a machine according to the preamble of claim 1 is e.g. known from JP-A-60145223 .
  • Machines for bending metal sheets in a substantially cylindrical way, called ferrules, using two-roller benders.
  • Such benders consist of a mechanical forming tool, also called forming roller, preferably made of metal and a second urethane roller which is able to deform the metal sheet through pressure against the forming tool.
  • the ends of the forming tool are supported and clamped at one end with a fixed end made with bearings and at the other end with devices, such as pivotinghinge supports, which, in any case, support the forming tool in just one point or in a very reduced area.
  • Said known machines have the drawback that the forming tool is subjected to pressure due to the roller levelling process which bends said forming tool in a non-symmetrical way with quite high bending values. Such bending of the forming tool is necessarily taken over in an unfavourable way by the ferrule, resulting in tubes that are not perfectly cylindrical.
  • the present invention favourably solves the drawbacks of the machines of the known art as it can obtain ferrules with a higher degree of cylindricity than those made by the machines available in the marketplace and, also, bend metal sheets so as to obtain ferrules of a variable radius without replacing the forming tool, also processing materials of different thicknesses and resistances.
  • the bending of the metal sheet is carried out by the first 180°.
  • the forming tool 2 is rotated in relation to the central axis of the forming roller 6. With said rotation, one of the auxiliary forming rollers (8) is engaged with the bending of the metal sheet, i.e., the forming roller 6, based on the bending radius of the metal sheet to be realized according to the predetermined processing programme.
  • Said first stage is depicted statically in Figure 5 , showing the forming tool 2, comprising a forming roller (6) incorporated in a shell (7) and auxiliary forming rollers (8), rotated to engage with an auxiliary roller (8) in the bending of the metal sheet.
  • the metal sheet to be bent is hence subjected to bending as a consequence of the pressure exerted by the elastomeric roller 1 against the rotated forming tool 2.
  • the bending process is interrupted once the first 180° of metal sheet bending have been reached.
  • the bending of the metal sheet through a further 180° takes place in a third stage, rotating the forming tool 2, in relation to the central axis of the forming roller 6, in a symmetrically opposite position to that taken on during the first stage of the procedure.
  • the bending of the metal sheet is carried out by a further 180° in the same way as the procedure described for the aforementioned stage two, obtaining a complete ferrule of the required radius.
  • the manufacturing machine object of the present invention also carries out a bending procedure of at least the first and last centimetre of the metal sheet to be bent, with no auxiliary roller (8) or forming tool (6) intervening in the bending of said portion of said metal sheet.
  • the bending procedure for said portions of the metal sheet, carried out by said machine, is carried out through the control, preferably electronic, of the amount of pressure exerted on the metal sheet and on the tool 2 by the elastomeric roller (1) according to the mechanical resistance of the metal sheet to be bent and the size of the bending radius to be realized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Adornments (AREA)
  • Laminated Bodies (AREA)
EP08716691A 2007-03-27 2008-03-26 Apparatus and method for bending of sheets for the manufacture of tubes Active EP2125261B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08716691T PL2125261T3 (pl) 2007-03-27 2008-03-26 Urządzenie oraz sposób gięcia arkuszy blachy do wytwarzania rur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000608A ITMI20070608A1 (it) 2007-03-27 2007-03-27 Macchina e procedimento per la curvatura di lamiere per la fabbricazione ditubi
PCT/EP2008/002369 WO2008116634A1 (en) 2007-03-27 2008-03-26 Apparatus and method for bending of sheets for the manufacture of tubes

Publications (2)

Publication Number Publication Date
EP2125261A1 EP2125261A1 (en) 2009-12-02
EP2125261B1 true EP2125261B1 (en) 2011-08-31

Family

ID=39580467

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08716691A Active EP2125261B1 (en) 2007-03-27 2008-03-26 Apparatus and method for bending of sheets for the manufacture of tubes

Country Status (5)

Country Link
EP (1) EP2125261B1 (pl)
AT (1) ATE522294T1 (pl)
IT (1) ITMI20070608A1 (pl)
PL (1) PL2125261T3 (pl)
WO (1) WO2008116634A1 (pl)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3205689A (en) * 1962-10-08 1965-09-14 Union Carbide Corp Apparatus for forming metal
US3371513A (en) * 1965-12-09 1968-03-05 Kaufmann Tool & Engineering Co Open end rolling machine
US3478555A (en) * 1966-12-15 1969-11-18 Kaufmann Tool & Eng Corp Two-roll machine for rolling sheet metal
JPS60145223A (ja) * 1984-01-07 1985-07-31 Masanori Mochizuki ロ−ル曲げ方法及びロ−ル曲げ装置
CH665572A5 (de) * 1984-11-30 1988-05-31 Kz Aviatsion Inst Tupoleva Zweiwalzen-blechbiegemaschine.
JP3325037B2 (ja) * 1991-09-20 2002-09-17 アイセル株式会社 ロール曲げ装置
DE9305070U1 (de) * 1993-04-02 1994-08-04 Fasti-Werk Carl Aug. Fastenrath GmbH & Co KG, 5632 Wermelskirchen Maschine zur Herstellung eines Rohrstutzens
JP3770683B2 (ja) * 1997-02-13 2006-04-26 アイセル株式会社 ロール曲げ装置

Also Published As

Publication number Publication date
ATE522294T1 (de) 2011-09-15
PL2125261T3 (pl) 2012-01-31
ITMI20070608A1 (it) 2008-09-28
WO2008116634A1 (en) 2008-10-02
EP2125261A1 (en) 2009-12-02

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