EP1149641B1 - Dispositif de pliage pour tuyaux métalliques à paroi mince - Google Patents

Dispositif de pliage pour tuyaux métalliques à paroi mince Download PDF

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Publication number
EP1149641B1
EP1149641B1 EP01108673A EP01108673A EP1149641B1 EP 1149641 B1 EP1149641 B1 EP 1149641B1 EP 01108673 A EP01108673 A EP 01108673A EP 01108673 A EP01108673 A EP 01108673A EP 1149641 B1 EP1149641 B1 EP 1149641B1
Authority
EP
European Patent Office
Prior art keywords
mandrel
pipe
bending device
bent
bending
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
EP01108673A
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German (de)
English (en)
Other versions
EP1149641A2 (fr
EP1149641A3 (fr
Inventor
Thomas Dr.-Ing. Flehmig
Uwe Dipl.-Ing. Kneiphoff
Dieter Scheuvens
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.)
ThyssenKrupp Steel Europe AG
Original Assignee
ThyssenKrupp Stahl AG
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 ThyssenKrupp Stahl AG filed Critical ThyssenKrupp Stahl AG
Publication of EP1149641A2 publication Critical patent/EP1149641A2/fr
Publication of EP1149641A3 publication Critical patent/EP1149641A3/fr
Application granted granted Critical
Publication of EP1149641B1 publication Critical patent/EP1149641B1/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
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
    • 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
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/05—Bending tubes using mandrels or the like co-operating with forming members
    • B21D9/07—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only

Definitions

  • the invention relates to a bending device for thin-walled metal pipes from a straight pipe guide, one adjoining and opposite the Pipe guide swiveling core template with terminal strip and a mandrel with one in the area of the core template curved, the outer arc of the pipe to be bent adapted, rigid mandrel tip and one on it subsequent, axially fixed in the pipe guide Spine shaft (see e.g. US-A-3 155 139).
  • Bending devices of this and similar types are known (Journal “Werkstatt und strig 104 (1971) 4, pages 271 to 274 "," Prevention of Wrinkles and Bending of thin-walled tubes when bending "by Prof. Dr.-Ing. G. ⁇ hler, Bad Dürkheim). Under "thin-walled” in this context one understands pipes, their Wall thickness based on the diameter and the Bending radius is small, e.g. B. pipes with a wall thickness of approximately 0.8 mm with a diameter of approximately 80 mm and a bending radius of approx. 120 mm.
  • the invention has for its object a To create a bending device of the type mentioned at the outset, compared to conventional spoon mandrels Metal pipe is supported on the inside for a greater length.
  • the clamping head can be made from a slotted Outer ring and an inner support and clamping cone consist of the self-tensioning on the bending process Outer ring works. This alternative is based on the Pulling force exerted on the tube during the bending process Tension ring and the tension cone transferred and in the sense a spread of the outer ring and thus a firmer Clamping effect exploited, while that of the traction device when Return the clamping head exerted force in the sense of solution acts.
  • the clamping head can also be made from consist of several, in particular two spherical links, which form a rigid structural unit.
  • the spring plate pack should be displaceable on the mandrel shaft by means of a thrust piece.
  • a tension cable is preferably suitable as a pulling means when the tensioning head is pulled back through the bent tube.
  • the invention is based on two Drawing illustrating embodiments explained.
  • the drawing shows the bending device after the bending process in the axial half-cut.
  • a fixed straight pipe guide 1 consists of a fixed straight pipe guide 1, one itself subsequent, pivotable core template 2 with a Terminal strip 3 and a mandrel with one in the area of Core template 2 arranged, curved, rigid Dornspitze 4 and an adjoining, in Area of the pipe guide 1 located mandrel shaft 5.
  • Die Mandrel tip 4 and the mandrel shaft 5 are during the Bending process axially fixed.
  • a traction device 6 Through the mandrel shaft 5 and the mandrel tip 4 is a traction device 6, the a chuck 7 from at least one, in Embodiment connected two spherical links is that form a rigid structural unit. That to bend Tube R is between this clamping head 7, the core template 2 and clamp 3 clamped.
  • the mandrel tip 4 is to be bent on the outer arc of the Tube R curved and the shape of the tube R in this adjusted the first section where the curvature takes place.
  • a curved one flat support surface 8 is provided, which in a straight flat support surface 9 in the region of the mandrel shaft 5 transforms.
  • the two support surfaces 8.9 form one Slideway for an axially displaceable spring plate package 10 by a push piece 11 with a push rod 11a is worn and the cross-section of the shape of the bending pipe R is adapted.
  • the individual slats of the spring plate pack 10 are dependent on its position with respect to the curved support surface 8 shifted more or less far against each other, whereby they also correspond to the curvature of the support surface 8 are bent.
  • the result is for that to be bent Pipe R is a bend that matches the desired inner bend equivalent.
  • the operation of the bending device according to the invention is the following:
  • the Terminal block 3 released and the spring plate pack 10 withdrawn. Then the chuck 7 on the Traction means 6 together with the mandrel back and forth bent tube R pulled.
  • the spherical clamping head 7 acts smoothing and, if necessary, re-profiling. To jamming in the pipe bend, it can despite the rigid Assembly of spherical limbs because of their good axial guidance at axially offset locations and their Shape does not come. Their rounds and their center Constrictions give enough space for that bent tube R and on the other hand act when retrieving re-profiling on the pipe R. It goes without saying that with more than two spherical links, for. B three Structure the middle link at least with its contour must jump back on the inner arch.
  • the clamping head 14 consists of a slotted, spherical outer ring 14a and a support and clamping cone 14b, on which the spring-loaded head piece 6a of the inner Tensioning rope 6 acts.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Claims (6)

  1. Dispositif de cintrage pour des tubes métalliques à paroi mince comprenant un guide de tube droit (1), un gabarit à noyau (2) se raccordant à celui-ci et pouvant être amené à pivoter par rapport au guide de tube (1), ayant une barre de serrage (3) et un mandrin présentant une tête de mandrin rigide (4), courbée dans la zone du gabarit à noyau (2) et adaptée à l'arc extérieur du tube à cintrer, et une tige de mandrin (5) qui est raccordée à celle-ci et qui est fixée axialement dans le guide de tube (1),
       caractérisé en ce qu'un ensemble de lames-ressorts (10) pouvant être disposé sur l'arc intérieur du tube à cintrer, s'étendant axialement et pouvant être cintré, repose à l'arrière de la tête de mandrin rigide (4) et peut se déplacer axialement sur la tête du mandrin (4), et en ce que, dans la zone du gabarit à noyau (2) et de sa barre de serrage (3) est prévue une noix de serrage (7, 14) sphérique pouvant être insérée dans le tube métallique, laquelle noix de serrage est raccordée à un moyen de traction (6) intérieur guidé par la tige de mandrin (5).
  2. Dispositif de cintrage selon la revendication 1, caractérisé en ce que la noix de serrage (7) est constituée de plusieurs éléments sphériques, qui forment une unité de construction rigide.
  3. Dispositif de cintrage selon la revendication 1, caractérisé en ce que la noix de serrage (14) est constituée d'une bague extérieure sphérique fendue (14a) et d'un cône inférieur de serrage et de support (14b), qui, lors du processus de cintrage, agit sur la bague extérieure avec un serrage automatique.
  4. Dispositif de cintrage selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la tête de mandrin (4) présente, dans la zone de l'arc intérieur, une légère courbe correspondant à l'arc intérieur du tube à cintrer.
  5. Dispositif de cintrage selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'ensemble de lames-ressorts (10) peut être déplacé sur la tige du mandrin (5) par l'intermédiaire d'une pièce coulissante (11).
  6. Dispositif de cintrage selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le moyen de traction (6) est un câble tendeur.
EP01108673A 2000-04-27 2001-04-06 Dispositif de pliage pour tuyaux métalliques à paroi mince Expired - Lifetime EP1149641B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10020728A DE10020728C2 (de) 2000-04-27 2000-04-27 Biegevorrichtung für dünnwandige Metallrohre
DE10020728 2000-04-27

Publications (3)

Publication Number Publication Date
EP1149641A2 EP1149641A2 (fr) 2001-10-31
EP1149641A3 EP1149641A3 (fr) 2002-10-09
EP1149641B1 true EP1149641B1 (fr) 2004-02-25

Family

ID=7640153

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01108673A Expired - Lifetime EP1149641B1 (fr) 2000-04-27 2001-04-06 Dispositif de pliage pour tuyaux métalliques à paroi mince

Country Status (2)

Country Link
EP (1) EP1149641B1 (fr)
DE (2) DE10020728C2 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE620631C (de) * 1931-12-15 1935-10-24 Alois Pyrzak Verfahren zum Biegen kantiger, insbesondere vierkantiger Rohre
US3155139A (en) * 1961-09-25 1964-11-03 Baldwin Lima Hamilton Corp Mandrel apparatus for tube bending
DD243441A1 (de) * 1985-12-18 1987-03-04 Tech Hochschule Verfahren und einrichtung zum biegen von hohlprofilen, vorzugsweise manometerfedern
DE19616048A1 (de) * 1996-04-23 1997-10-30 Epi Ag Spaeth Engineering Verfahren zum Kern-Wickel-Roll-Biegen von Hohlprofilen
DE19707228A1 (de) * 1997-02-24 1998-08-27 Rudi Maas Biegedorn

Also Published As

Publication number Publication date
EP1149641A2 (fr) 2001-10-31
DE50101528D1 (de) 2004-04-01
EP1149641A3 (fr) 2002-10-09
DE10020728C2 (de) 2002-06-27
DE10020728A1 (de) 2001-11-08

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