EP1393830B1 - Machine pour le cintrage continu de tôle - Google Patents

Machine pour le cintrage continu de tôle Download PDF

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Publication number
EP1393830B1
EP1393830B1 EP03017934A EP03017934A EP1393830B1 EP 1393830 B1 EP1393830 B1 EP 1393830B1 EP 03017934 A EP03017934 A EP 03017934A EP 03017934 A EP03017934 A EP 03017934A EP 1393830 B1 EP1393830 B1 EP 1393830B1
Authority
EP
European Patent Office
Prior art keywords
rotating elements
station
sheet metal
varying
rotating
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.)
Expired - Lifetime
Application number
EP03017934A
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German (de)
English (en)
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EP1393830A1 (fr
Inventor
Livio Travini
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.)
Olimpia 80 SRL
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Olimpia 80 SRL
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Publication date
Application filed by Olimpia 80 SRL filed Critical Olimpia 80 SRL
Publication of EP1393830A1 publication Critical patent/EP1393830A1/fr
Application granted granted Critical
Publication of EP1393830B1 publication Critical patent/EP1393830B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D5/06—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
    • 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
    • B21D5/08—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 making use of forming-rollers

Definitions

  • the present invention concerns a machine for continuous sheet metal bending, and in particular a bending machine used in the manufacture of pipes or open profiles.
  • the bending machines used in pipe manufacturing are those bending machines provided with a series of stations placed in series and suitably spaced apart, wherein each station has a pair of opposed driven forming rollers through which the sheet metal to be processed passes.
  • the rollers of each pair have a complementary profile and in particular, whilst the bottom roller has a concave profile, the top roller has a convex profile which reproduces exactly the curvature of the bottom roller.
  • Each pair of opposed rollers has a radius of curvature smaller than the radius of curvature of the station situated directly upstream. Therefore, the sheet metal which is in the flat condition at the first station will progressively change its profile as it travels through the machine, taking on a substantially tubular shape at the last station and will thus be ready to be welded.
  • US-A-5 704 243 in accordance with the preamble of claim 1, discloses a station for a sheet metal bending machine, said station being provided with two opposed forming rollers to define the bending profile of the sheet metal, whereby each forming roller is defined by a pair of rotating elements coaxial and facing each other and means for varying the distance between the rotating elements of each pair are provided.
  • JP-A-2000 117330 and JP-A-09239448 show bending stations provided with two opposed forming rollers to define the bending profile of the sheet metal.
  • the object of the present invention is to solve the problems of the prior art, providing a machine that allows a reduction in set up times for passing from production of a pipe with a certain diameter to a pipe with a different diameter.
  • Another object of the present invention is to provide a bending machine that allows the production waste due to setting up of the machine to be eliminated.
  • Another object of the present invention is to simplify production of sheet metal pipes, reducing down time of the bending machine with a consequent improvement in investment and running costs of the machine.
  • the bending machine has two or more bending stations disposed in series, each station being provided with two opposed forming rollers to define the bending profile of the sheet metal, and is characterised in that each forming roller is defined by a pair of rotating elements, coaxial and facing each other, and in that means to vary the distance between the rotating elements of each pair are provided.
  • the machine further comprises means for varying the inclination of the axis of rotation of each rotating element.
  • the means for varying the distance comprise a movable support for the rotating element.
  • the movable support comprises sliding means slidably engageable on guides of the station to vary the reciprocal distance along the axis of rotation of the facing rotating elements.
  • Each movable support advantageously comprises sliding means slidably engageable on vertical guides of the station to vary the vertical position of said rotating elements.
  • the means for varying the inclination of said rotating elements comprise a cylinder-piston assembly.
  • the means for varying the inclination of the two rotating elements advantageously comprise at least two points of hinging.
  • the bending machine 1 comprises a plurality of stations 2 disposed in series.
  • Each station 2 as can be seen better in Figure 2, is provided with two opposed rollers (3, 4) through which the sheet metal to be processed passes, able to define the bending profile of the sheet metal, that is to say the shape taken on by the sheet metal after passing in the station.
  • Each roller (3, 4) is defined by a pair of coaxial rotating elements (3a, 3b; 4a, 4b), facing each other and appropriately spaced apart from each other.
  • the top roller 3 is defined by the two rotating elements 3a and 3b
  • the bottom roller 4 is defined by the two rotating elements 4a and 4b.
  • top rotating element 3a cooperates with the rotating element 4a to which it is opposed and together with which defines the outer left bending profile of the sheet metal
  • top rotating element 3b cooperates with the rotating element 4b to which it is opposed to define the outer right bending profile of the sheet metal.
  • the station 2 is provided with means for varying the reciprocal distance of the two facing rotating elements.
  • means are present for horizontally translating along the common axis of rotation the position of the two rotating elements which define the same roller.
  • Each station is also provided with means, described in greater detail further on, for varying the inclination of each rotating element (3a, 3b; 4a, 4b) and in particular the inclination of the axis of rotation of each rotating element.
  • each rotating element (3a, 3b; 4a, 4b) is advantageously supported by a mobile support (5a, 5b; 6a, 6b) provided with sliding means 8 able to engage a guide (not shown) disposed level with the base 30 or with the top 31 of the station 2, parallel to the axes of rotation of the rotating elements.
  • a mobile support (5a, 5b; 6a, 6b) provided with sliding means 8 able to engage a guide (not shown) disposed level with the base 30 or with the top 31 of the station 2, parallel to the axes of rotation of the rotating elements.
  • supports 5a and 5b of the bottom rotating elements slide on slides 32 disposed on the base 30 of the station 2
  • the top supports 6a and 6b slide on slides 33 disposed at the top 31 of the station 2.
  • each rotating element (3a, 3b; 4a, 4b), as can be seen better in Figure 3, are formed by an upright 9 hinged at 16 to an L-shaped crosspiece 10 fixed to a supporting metal tube 23 of the rotating element.
  • the upright 9 in turn consists of a cylinder-piston assembly formed by a cylinder 11 provided with an inner chamber wherein a piston, not shown directly, slides.
  • the latter is provided with a stem 12 which extends outside the cylinder 11 and is hinged at 16 to the crosspiece 10.
  • the cross piece 10, at the end not constrained to the upright 9, has a point 14 of hinging with the movable support (5a, 5b; 6a, 6b).
  • Each supporting metal tube 23, and thus the rotating element (3a, 3b; 4a, 4b) associated therewith, is fixed rotatably to the mobile support (5a, 5b; 6a, 6b) through a pin provided in the hinging point 14 which in this manner forms the pivot around which the rotating element (3a, 3b; 4a, 4b) rotates to vary its inclination.
  • the upright 9 has, level with its base, a further hinging point 15.
  • Positioning relative to the rotating elements (3a, 3b; 4a, 4b) is adjusted by suitable automation means.
  • suitable automation means there are present hydraulic operating means of the cylinder piston assemblies, four electric motors 17 each of which is dedicated to sliding a support (5a, 5b; 6a, 6b) and two motors 18, disposed at the top of the station 2, for vertical movement of the rollers 3 and 4.
  • each support (5a, 5b; 6a, 6b) has, for horizontal translation thereof, a nut screw type engagement 7 with a motor 17.
  • top supports 6a and 6b are slidably engaged in vertical guides 21 which allow, under the guidance of the motors 18, vertical translation of said top supports 6a and 6b. Vertical translation of the supports 6a and 6b leads to vertical translation of the rotating elements 3a and 3b.
  • the bottom supports 5a and 5b are mounted, for their vertical movements, on slides 32 vertically slidable in the guides 21.
  • the slides 32 also are guided in their vertical movements by motors 18 which thus allow the position of the bottom rotating elements 4a and 4b to be varied vertically.
  • each supporting element (5a, 5b; 6a, 6b) vertically in a separate manner makes it possible to carry out both so-called fixed centre pipe processing - where the axis of symmetry of the pipe remains fixed and thus the sheet metal is bent around said axis as it travels through the successive stations 2 of the machine - and fixed throat processing where the central portion of the metal sheet which will form the bottom end of the pipe remains fixed.
  • All the motors 17 and 18 and the cylinder-piston assemblies are adjusted by an electronic processor, not shown, per se known in the art and normally used for this purpose, able to memorize the relative positions of the rotating elements according to the type of pipe or of open section being produced and operate the motors 17, 18 and/or the cylinder-piston assemblies to vary the position of the rotating elements according to the pipe or to the profile processed.
  • the processor is able to respond to messages sent by suitable position control instruments, such as optical rulers or incremental encoders, not directly shown, to vary the relative position of the rotating elements (3a, 3b; 4a, 4b) so that the latter match each other perfectly in the pre-set radiuses of curvature.
  • suitable position control instruments such as optical rulers or incremental encoders, not directly shown
  • the rotating elements of the stations 2 are all idle, but it would nevertheless be possible to motorise them without departing from the scope of the present invention.
  • intermediate stations 20 provided with driven rotating members are present between two adjacent stations, as shown in Figure 1.
  • the rotating elements have a cylindrical shape provided with curved surfaces.
  • the top rotating elements have a convex curved side profile and the bottom rotating elements have a concave curved side profile corresponding to that of the top rotating elements to define together therewith the outer bending shape of the sheet metal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Claims (12)

  1. Poste (2) pour machine de cintrage de feuillards métalliques, équipé de deux rouleaux de formage opposés (3, 4) servant à définir le profil de cintrage du feuillard métallique, chaque rouleau de formage (3, 4) étant défini par une paire d'éléments en rotation (3a, 3b ; 4a, 4b) coaxiaux et se faisant face, et où sont prévus des moyens permettant de varier la distance entre les éléments en rotation de chaque paire (3a, 3b ; 4a, 4b), des moyens permettant de varier l'inclinaison de l'axe de rotation desdits éléments en rotation (3a, 3b ; 4a, 4b) et des moyens permettant de déplacer verticalement au moins une desdites paires d'éléments en rotation (3a, 3b ; 4a, 4b), lesdits moyens permettant de varier la distance comprenant un support mobile (5a, 5b ; 6a, 6b) pour chaque élément en rotation (3a, 3b ; 4a, 4b),
    caractérisé en ce que chaque support (5a, 5b; 6a, 6b) est mobile et inclinable indépendamment et comprend des moyens coulissants pouvant s'engager en glissant sur des guides verticaux (21) dudit poste (2) afin de varier sa position verticale.
  2. Poste (2) selon la revendication 1, caractérisé en ce que chaque support mobile et inclinable indépendamment (5a, 5b; 6a, 6b) comprend des moyens coulissants (8) pouvant s'engager en glissant sur des guides (21) dudit poste (2) afin de varier la distance entre lesdits éléments en rotation se faisant face (3a, 3b ; 4a, 4b).
  3. Poste (2) selon la revendication 1, caractérisé en ce que lesdits moyens permettant de varier l'inclinaison desdits éléments en rotation (3a, 3b ; 4a, 4b) comprennent un assemblage vérin-piston agissant sur un tube métallique porteur (23) de l'élément en rotation, chaque tube métallique porteur étant fixe en rotation sur un support mobile (5a, 5b ; 6a, 6b).
  4. Poste (2) selon la revendication 3, caractérisé en ce que lesdits moyens permettant de varier l'inclinaison desdits éléments en rotation (3a, 3b ; 4a, 4b) comprennent au moins deux points de pivotement.
  5. Poste (2) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte en outre des moyens d'automation permettant de varier la position desdits éléments en rotation (3a, 3b ; 4a, 4b).
  6. Poste (2) selon la revendication 5, caractérisé en ce que lesdits moyens d'automation comprennent au moins un moteur électrique, au moins un processeur et des moyens fonctionnant de manière hydraulique pour ledit assemblage vérin-piston.
  7. Poste (2) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte des moyens de contrôle de la position réciproque desdits éléments en rotation (3a, 3b ; 4a, 4b).
  8. Poste (2) selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits éléments en rotation (3a, 3b ; 4a, 4b) ont une forme de profil incurvée.
  9. Poste (2) selon la revendication 5, caractérisé en ce que les éléments en rotation du haut (3a, 3b) ont une forme de profil incurvée convexe et que les moyens de rotation du fond (4a, 4b) ont une forme de profil incurvée concave correspondant à celle desdits éléments en rotation du haut (3a, 3b).
  10. Poste (2) selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits éléments en rotation (3a, 3b ; 4a, 4b) sont passifs.
  11. Machine de cintrage de feuillards métalliques (1) comprenant au moins deux postes (2) suivant au moins une des revendications précédentes, disposés en série.
  12. Machine selon la revendication 11, caractérisée en ce qu'elle comprend en outre des postes intermédiaires (20) équipés de rouleaux menés afin de déplacer les feuillards métalliques entre les divers postes (2) de la machine (1).
EP03017934A 2002-08-27 2003-08-06 Machine pour le cintrage continu de tôle Expired - Lifetime EP1393830B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT001855A ITMI20021855A1 (it) 2002-08-27 2002-08-27 Macchina di piegatura di lamiera in continuo.
ITMI20021855 2002-08-27

Publications (2)

Publication Number Publication Date
EP1393830A1 EP1393830A1 (fr) 2004-03-03
EP1393830B1 true EP1393830B1 (fr) 2005-11-02

Family

ID=31198622

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03017934A Expired - Lifetime EP1393830B1 (fr) 2002-08-27 2003-08-06 Machine pour le cintrage continu de tôle

Country Status (5)

Country Link
EP (1) EP1393830B1 (fr)
AT (1) ATE308391T1 (fr)
DE (1) DE60302119T2 (fr)
ES (1) ES2252597T3 (fr)
IT (1) ITMI20021855A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2498872C2 (ru) * 2008-09-18 2013-11-20 Олимпия 80 С.Р.Л. Станок с переменной линейной структурой для формирования труб

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1394852B1 (it) * 2009-07-21 2012-07-20 Olimpia 80 Srl Macchina a geometria lineare variabile per formare in continua tubi quadri
US8522589B2 (en) 2010-12-28 2013-09-03 Olimpia 80 S.R.L. Machine of variable linear structure for the formation of tubes
CN103028601B (zh) * 2011-10-09 2015-10-14 北方工业大学 连轧连辊成形方法及其装置
CN104226762B (zh) * 2014-09-03 2017-03-29 兰州兰洛炼化设备有限公司 螺旋板翻边装置
ITUB20159476A1 (it) * 2015-12-23 2017-06-23 Olimpia 80 Srl Stazione di finitura di una macchina per la produzione di tubi quadri
CN105478550B (zh) * 2016-01-14 2017-06-16 大连三高集团有限公司 带角度旋转可调的内壁辊装置及使用该装置的予弯成型机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR930011517B1 (ko) * 1989-12-04 1993-12-10 가와사끼 세이데쓰 가부시끼가이샤 용접강관의 제조장치
JPH0441021A (ja) * 1990-06-06 1992-02-12 Sumitomo Metal Ind Ltd 溶接管の製造装置
US5704243A (en) * 1992-09-25 1998-01-06 Nippon Steel Corporation Forming method and forming stand for welded pipes
JPH09239448A (ja) * 1996-03-06 1997-09-16 Hitachi Metals Ltd 電縫管成形ロールスタンド
JP2000117330A (ja) * 1998-10-15 2000-04-25 Aida Engineering Co Ltd ロール成形機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2498872C2 (ru) * 2008-09-18 2013-11-20 Олимпия 80 С.Р.Л. Станок с переменной линейной структурой для формирования труб

Also Published As

Publication number Publication date
ITMI20021855A1 (it) 2004-02-28
ATE308391T1 (de) 2005-11-15
DE60302119D1 (de) 2005-12-08
ES2252597T3 (es) 2006-05-16
DE60302119T2 (de) 2006-07-20
EP1393830A1 (fr) 2004-03-03

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