EP2165779B1 - Machine à structure linéaire variable pour la formation de tuyaux - Google Patents

Machine à structure linéaire variable pour la formation de tuyaux Download PDF

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Publication number
EP2165779B1
EP2165779B1 EP20090169379 EP09169379A EP2165779B1 EP 2165779 B1 EP2165779 B1 EP 2165779B1 EP 20090169379 EP20090169379 EP 20090169379 EP 09169379 A EP09169379 A EP 09169379A EP 2165779 B1 EP2165779 B1 EP 2165779B1
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EP
European Patent Office
Prior art keywords
forming
rollers
station
machine
sheet metal
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Active
Application number
EP20090169379
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German (de)
English (en)
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EP2165779A1 (fr
Inventor
Vittorio Travini
Riccardo Bosoni
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Olimpia 80 SRL
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Olimpia 80 SRL
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Publication of EP2165779A1 publication Critical patent/EP2165779A1/fr
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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
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams

Definitions

  • the present invention refers to a machine for the formation of tubes, called “of variable linear structure", which comprises a plurality of forming stations, placed in series with each other, which progressively bend a strip of sheet metal to form a tube, followed by at least one finishing station which further brings together the edges of the bent strip of sheet metal in view of the final welding.
  • Machines for forming tubes by means of continuous bending of sheet metal are well known to the art and comprise, in series with each other, a plurality of stations in which the strip of sheet metal is progressively deformed by pairs of rollers having matching profiles.
  • Object of the present invention is to realise a machine "of variable linear structure" for the formation of tubes, which improves the performance of machines of the type described, for example, by the aforementioned European patent since it allows the range of values of the diameter of the tubes to be widened without having to replace the pairs of rollers.
  • a machine for continuous formation of tubes realised according to the invention comprises, in series with each other, forming stations which progressively bend a strip of sheet metal and at least one finishing station which further brings together the edges of the bent strip of sheet metal in view of the final welding.
  • Each forming station comprises two pairs of idle forming rollers which make rototranslational movements of the same amplitude but in opposite directions and the at least one finishing station comprises four idle forming rollers able to make movements of the same amplitude and direction according to 90° axes.
  • the profile of the lower rollers of each forming station is elliptical with a decreasing curvature from the outer edge to the inner edge of said roller, that of the upper rollers of the first forming station is elliptical with an increasing curvature from the outer edge to the inner edge of said roller, that of the upper rollers of the forming stations subsequent to the first one (hereafter called "second forming stations") is circular and that of the forming rollers of the at least one finishing station is concave with a constant curvature.
  • the radius of the circular profile of the upper rollers of each second forming station preferably corresponds to the minimum radius of curvature of the bent strip of sheet metal in correspondence of said second forming station and the curvature of the concave profile of the forming rollers of the at least one finishing station corresponds to the maximum curvature of the bent strip of sheet metal in correspondence of said finishing station.
  • a machine according to the invention is called "of variable linear structure" since (as indicated very diagrammatically in Figures 5 and 7 ) makes it possible to produce tubes of different diameters by changing the reciprocal positions of the two pairs of rollers and those of each of the rollers of each pair.
  • Figure 1 shows diagrammatically a perspective view of a machine 1 according to the invention for the formation of tubes 2 which comprises, in series with each other, traction means 13 for the strip of sheet metal 4 (which enters the machine 1 in the direction of the arrow I), a first forming station 3, second forming stations 3', containment stations 12 (each of which is situated downstream of a forming station), at least one finishing station 5 and at least one welding station (per se known and omitted in Figures 1 and 2 ), from which the tube 2 exits in the direction of the arrow U.
  • the machine 1 comprises five second forming stations 3', six containment stations 12 (visible in the side view of Figure 2 ) situated downstream of the forming stations (3 3') and two finishing stations 5 but, without departing from the scope of the invention, the number of second forming stations 3' (and, consequently, that of containment stations 12) and finishing stations 5 can vary to meet the particular requirements of a specific machine 1.
  • the traction means 13 will not be described because they are per se known.
  • the first forming station 3 will be described with reference to Figures 3-5
  • a second forming station 3' will be described with reference to Figures 6-7
  • a containment station 12 will be described with reference to Figure 8
  • a finishing station 5 will be described with reference to Figure 9 .
  • Figure 2 shows diagrammatically a side view of the machine 1 of Figure 1 , which makes it possible to see more clearly the containment stations 12 situated downstream of a forming station (3, 3').
  • Figure 3 shows diagrammatically a front view of the first forming station 3 of the machine 1, symmetrical with respect to the midline, which comprises two vertical uprights 31 which support two horizontal traverses 32, sliding along the uprights 31; along each traverse 32 slide two shoes 33, on each of which is present a pivot 34 which acts as a fulcrum for rotation of a unit 35 that carries one of the forming rollers (8, 8').
  • This supporting structure (32, 33, 34) allows the axes of the forming rollers (8, 8') to perform a rototranslational movement, in the vertical plane, inside the forming station 3 that allows a considerable freedom in positioning and orienting the rollers (8, 8') of each pair, whilst always keeping them in contact with each other, to adapt them to the diameter of the tube to be produced, as schematically indicated in Figure 5 , which shows the position assumed by the two pairs in rollers (8, 8') for three diameters of the tube 2 coming within the tubes 2 that can be produced without replacing the forming rollers (8, 8').
  • Figure 3A shows diagrammatically, enlarged, the area of the first forming station 3 comprising the two pairs of rollers (8, 8'), supported by the units 35, which deform the outermost area of the strip of sheet metal 4.
  • Figure 4 shows diagrammatically, enlarged, a pair of forming rollers (8, 8'), realised according to the invention, belonging to the first forming station 3; from Figure 4 it can be seen that the profile of the lower rollers 8' is elliptical with a curvature decreasing from the outer edge to the inner edge of the roller 8', whereas the profile of the upper rollers 8 is elliptical with a curvature increasing from the outer edge to the inner edge of the roller 8.
  • Figure 5 shows diagrammatically, enlarged, the position assumed by the two pairs of forming rollers (8, 8') of the first forming station 3 to produce three tubes 2 of different diameter coming within the tubes 2 that can be produced without replacing the forming rollers (8, 8'): the elliptical profiles of the rollers 8 and 8' allow the radius of curvature of the outermost areas of the strip of sheet metal 4 to be modified by modifying only the position and orientation of the rollers (8, 8').
  • Figure 6 shows diagrammatically a front view of one of the second forming stations 3' of the machine 1, situated downstream of the first forming station 3, from which it differs essentially in that the upper rollers 8" have a circular profile whose radius corresponds to the minimum radius of curvature (within the range of tubes 2 that can be produced without replacing the forming rollers 8' and 8") of the bent strip of sheet metal 4 in correspondence of said second forming station 3' and in that the pairs of forming rollers (8', 8") belonging to the second forming stations 3' deform the inner part of the strip of the sheet metal 4.
  • Figure 6a shows diagrammatically, enlarged, a pair of forming rollers (8", 8'), realised according to the invention, belonging to a second forming station 3'; from Figure 6a it can be seen that the profile of the lower rollers 8' is elliptical with a curvature decreasing from the outer edge to the inner edge of the roller 8', whereas the profile of the upper rollers 8" is circular.
  • Figure 7 shows diagrammatically, enlarged, the position assumed by the two pairs of forming rollers (8', 8") of the second forming station 3' of Figure 6 to produce the three tubes of different diameter of Figure 5 : the elliptical profile of the lower rollers 8' allows the radius of curvature of the inner part of the strip of sheet metal 4 to be modified by modifying only the position and orientation of the forming rollers 8' and 8".
  • the amplitude of the rototranslational movements permitted to the forming rollers (8, 8', 8") by the supporting structure (32, 33, 34) and the particular profiles of the forming rollers (8, 8', 8") allow the range of values of the diameter of the tubes which can be produced without having to replace the forming (8, 8', 8") to be increased with respect to machines of the prior art.
  • Figure 8 shows diagrammatically a front view of one of the containment stations 12 situated downstream of the forming stations 3 and 3'.
  • This station 12 symmetrical with respect to the midline, consists of two guides 81, fixed to uprights 31, each of which allows translation along an inclined axis of a shoe 82 which supports an idle roller 83, having a concave profile, which guides and supports the strip of sheet metal 4 between two adjacent forming stations (3, 3').
  • the containment stations 12 can be omitted without departing from the scope of the invention.
  • each rollers 83 presents a protruding disc element 84 (seen better in Figure 8a , which shows diagrammatically an enlarged detail of the containment station 12), which protrudes with respect to the body of the roller 83 to contain the edge 6 of the strip of sheet metal 4.
  • Figure 9a shows diagrammatically a front view ( Figure 9a ) and a side view sectioned along the plane F-F of Figure 9a ( Figure 9b ) of a finishing station 5 belonging to the machine 1, which differs from the forming stations (3, 3') previously described essentially in that each of the units 35 carries a forming roller 91 acting on the outer surface of the strip of sheet metal 4 bent to form the tube 2 and in that it further comprises a roller 92, the position of which between the edges 6 of the strip of sheet metal 4 forming the tube 2 is adjustable by means of a lever 93 operated in a per se known manner.
  • the forming rollers 91 have a concave profile, with a constant curvature equal to the maximum value of the curvature presented by the strip of bent sheet metal 4 in correspondence to the finishing station 5 during production of one of the tubes 2 that can be produced without replacing the forming rollers (8, 8', 8") of the forming stations (3, 3'); the roller 92 has a convex V-shaped profile.
  • Figure 9c shows diagrammatically an enlarged detail of the finishing station 5 of Figure 9a , where the forming rollers 91 acting on the outer surface of the strip of sheet metal 4 bent to form the tube 2 and the roller 92 situated between the edges 6 of the strip of sheet metal 4 can be seen better.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Soil Working Implements (AREA)
  • Control Of Metal Rolling (AREA)
  • Endoscopes (AREA)

Claims (10)

  1. Machine (1) pour la formation continue de tuyaux (2) comprenant, en série les unes entre les autres, des stations de formation (3, 3') aptes à cintrer progressivement une bande de feuillard métallique (4) et au moins une station de finissage (5) apte à rassembler plus les bords (6) de la bande cintrée de feuillard métallique (4) en vue du soudage final, chaque station de formation (3, 3') incluant deux paires de rouleaux de formation stationnaires (8, 8', 8") aptes à exécuter des mouvements roto-translationnels de même amplitude mais dans des sens opposés, caractérisée en ce que :
    - le profil des rouleaux inférieurs (8') de chaque station de formation (3, 3') est elliptique avec une courbure décroissante du bord extérieur vers le bord intérieur dudit rouleau (8') ;
    - le profil des rouleaux supérieurs (8) de la première station de formation (3) est elliptique avec une courbure croissante du bord extérieur vers le bord intérieur dudit rouleau (8) ;
    - le profil des rouleaux supérieurs (8") des stations de formation (3') suivant la première (3) est circulaire.
  2. Machine (1) selon la revendication 1, caractérisée en ce que l'au moins une station de finissage (5) inclut quatre rouleaux de formage stationnaires (91) ayant un profil concave à courbure constante et aptes à exécuter des mouvements de même amplitude et sens en fonction d'axes à 90°.
  3. Machine (1) selon la revendication 1, caractérisée en ce que le rayon du profil circulaire des rouleaux supérieurs (8") de chaque station de formation (3') suivant la première (3) correspond au rayon minimal de courbure de la bande cintrée de feuillard métallique (4) en correspondance avec ladite station de formation (3') suivant la première (3).
  4. Machine (1) selon la revendication 1, caractérisée en ce que chaque station de formation (3, 3') et au moins une station de finissage (5) incluent deux montants verticaux (31) qui supportent deux traverses horizontales (32) glissant le long des montants (31), sachant que le long de chacune desdites traverses (32) glissent deux patins (33) dont chacun présente un pivot (34) qui fait office d'axe de pivotement pour la rotation d'une unité (34) qui porte un des rouleaux de formation (8, 8', 8" ; 91).
  5. Machine (1) selon la revendication 1, caractérisée en ce que les paires de rouleaux de formation (8, 8', 8") appartenant à la première station de formation (3) déforment les zones situées le plus à l'extérieur de la bande de feuillard métallique (4) et que la paire de rouleaux de formation (8, 8") appartenant aux stations de formation (3') suivant la première (3) déforme la partie intérieure de la bande de feuillard métallique (4).
  6. Machine (1) selon la revendication 1, caractérisée en ce qu'elle comprend aussi des stations de rétention (12) dont chacune est située après une station de formation (3, 3').
  7. Machine (1) selon la revendication 6, caractérisée en ce que chaque station de rétention (12) inclut deux guides (81) fixés aux montants (31) et dont chacun permet la translation suivant un axe incliné d'un patin (82) qui porte un rouleau (83) ayant un profil concave apte à guider la bande de feuillard métallique (4) entre deux stations de formation adjacentes (3, 3').
  8. Machine (1) selon la revendication 7, caractérisée en ce que la partie supérieure de chaque rouleau (83) présente un élément en forme de disque (84) dépassant du corps du rouleau (83) et apte à contenir le bord (6) de la bande de feuillard métallique (4).
  9. Machine (1) selon la revendication 4, caractérisée en ce que chacune des unités (35) d'au moins une station de finissage (5) porte un rouleau de formation (91) agissant sur la surface extérieure de la bande de feuillard métallique (4) cintrée pour former le tuyau (2) et en ce qu'elle inclut aussi un rouleau (92) et un levier (93) apte à ajuster la position du rouleau (92) entre les bords (6) de la bande de feuillard métallique (4) formant le tuyau (2).
  10. Machine (1) selon la revendication 9, caractérisée en ce que les rouleaux de formation (91) ont un profil concave avec une courbure constante et égale à la valeur maximale de la courbure présentée par la bande cintrée de feuillard métallique (4) en correspondance avec la station de finissage (5) pendant la production d'un des tuyaux (2) qui peuvent produits sans remplacer les rouleaux de formation (8, 8', 8") des stations de formation (3, 3') et en ce que la rouleau (92) a un profil convexe en forme de V.
EP20090169379 2008-09-18 2009-09-03 Machine à structure linéaire variable pour la formation de tuyaux Active EP2165779B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI2008A001662A IT1392055B1 (it) 2008-09-18 2008-09-18 Macchina a geometria lineare variabile per la formazione di tubi

Publications (2)

Publication Number Publication Date
EP2165779A1 EP2165779A1 (fr) 2010-03-24
EP2165779B1 true EP2165779B1 (fr) 2014-12-31

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Application Number Title Priority Date Filing Date
EP20090169379 Active EP2165779B1 (fr) 2008-09-18 2009-09-03 Machine à structure linéaire variable pour la formation de tuyaux

Country Status (6)

Country Link
EP (1) EP2165779B1 (fr)
CN (1) CN101676043B (fr)
BR (1) BRPI0903482A2 (fr)
ES (1) ES2533660T3 (fr)
IT (1) IT1392055B1 (fr)
RU (1) RU2498872C2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5523579B2 (ja) * 2010-11-04 2014-06-18 株式会社中田製作所 成形方法と成形装置
CN103302145B (zh) * 2013-06-14 2015-04-22 娄底市高盛板业有限公司 一种用于室内排水管的90°角板成型设备

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT329948B (de) * 1974-07-31 1976-06-10 Krems Huette Gmbh Verfahren und vorrichtung zum herstellen von geschweissten rohren verschiedener dimensionen
FI74414C (fi) * 1980-08-18 1988-02-08 Sl Tuotanto Oy Anordning foer framstaellning av ett metallroer.
RU2042445C1 (ru) * 1993-03-29 1995-08-27 Новолипецкий металлургический комбинат Трубоформовочный стан
JP3369483B2 (ja) * 1998-08-24 2003-01-20 日下部電機株式会社 電縫溶接管の製造装置
JP2001259733A (ja) * 2000-03-16 2001-09-25 Mitsubishi Shindoh Co Ltd 電縫管の製造装置および製造方法
CN2471445Y (zh) * 2001-03-08 2002-01-16 刘玲 双头卷耳机
CN2491148Y (zh) * 2001-07-09 2002-05-15 吴友国 箍筋弯曲成型机
RU2218224C1 (ru) * 2002-06-21 2003-12-10 ОАО Верхнесалдинское металлургическое производственное объединение Валковые калибры асимметричной формовки трубной заготовки из труднодеформируемых сплавов
ITMI20021855A1 (it) * 2002-08-27 2004-02-28 Olimpia 80 Srl Macchina di piegatura di lamiera in continuo.
RU2232655C1 (ru) * 2002-12-27 2004-07-20 Открытое акционерное общество "Северсталь" Способ изготовления электросварных прямошовных труб

Also Published As

Publication number Publication date
CN101676043B (zh) 2014-07-16
RU2009134904A (ru) 2011-03-27
BRPI0903482A2 (pt) 2010-07-20
EP2165779A1 (fr) 2010-03-24
ES2533660T3 (es) 2015-04-13
ITMI20081662A1 (it) 2010-03-19
IT1392055B1 (it) 2012-02-09
RU2498872C2 (ru) 2013-11-20
CN101676043A (zh) 2010-03-24

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