EP1149641A2 - 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
EP1149641A2
EP1149641A2 EP01108673A EP01108673A EP1149641A2 EP 1149641 A2 EP1149641 A2 EP 1149641A2 EP 01108673 A EP01108673 A EP 01108673A EP 01108673 A EP01108673 A EP 01108673A EP 1149641 A2 EP1149641 A2 EP 1149641A2
Authority
EP
European Patent Office
Prior art keywords
mandrel
bending device
tube
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.)
Granted
Application number
EP01108673A
Other languages
German (de)
English (en)
Other versions
EP1149641B1 (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
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
    • 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 Thorn shaft.
  • 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 whose Wall thickness based on the diameter and the Bending radius is small, e.g. B. Pipes with a wall thickness of approx. 0.8 mm with a diameter of approx. 80 mm and a bending radius of approx. 120 mm.
  • a spoon mandrel which has a bent tip, the is at least adapted to the shape of the outer curve, is one
  • the pipe can only be supported over a short arc length, otherwise the spoon arbor after the bend is complete cannot be withdrawn.
  • the essential Difference between jointed thorns and thorns Coil springs on one side and spoon pins on the other side is that the first mentioned thorns during the bending process the tube together with the flexible part of the mandrel being moved while it is in the case of a spoon mandrel, axially in the pipe guide fixed mandrel is pulled.
  • the disadvantage with Spoon mandrels consist in the fact that they are in the bending area relatively short supporting the tube inside Have length because otherwise after completing the bend the spoon arbor because of its rigid, curved Thorn tip no longer comes out of the bent tube can be pulled out.
  • the invention has for its object a To create bending device of the type mentioned in the introduction, which in comparison to conventional spoon mandrels Supported metal tube on a longer length inside.
  • Bending device of the type mentioned in the introduction solved that one on the inner bend of the pipe to be bent arranged, axially extending, flexible Spring plate pack on the back of the rigid mandrel tip supported and axially displaceable on the mandrel tip and that in the area of the core template and its Clamping strip is a spherical one that can be inserted into the metal tube Clamping head is provided on a through the mandrel shaft guided inner traction device is connected.
  • the Immovable mandrel tip adapted to the outer arch and the supported spring plate pack is supported the pipe to be bent is supported over a greater length, than is possible with conventional spoon pins. Since that Spring plate pack is axially displaceable, it can after Making the bend be withdrawn so that Space is created around the rigid mandrel tip without Collision on the inner arch from the curved part of the Withdraw the metal pipe.
  • the axial entrainment of the Tube when bending through the core template is secure guaranteed by the spherical clamping head, which over the Traction means also easily through the curved tube can be withdrawn and possibly still Smoothing and / or profiling tasks on the curved Rohr takes over.
  • 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 an expansion of the outer ring and thus a firmer Clamping effect exploited, while that of the traction device Return the clamping head exerted force in the sense of solution works.
  • 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 tensioning rope is preferably suitable as a traction means when the tensioning head is pulled back through the bent tube.
  • 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 which 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 curved and the shape of the tube in this first Adjusted section where the curvature takes place.
  • a curved flat Support surface 8 provided in a straight flat Support surface 9 passes in the region of the mandrel shaft 5.
  • the two support surfaces 8.9 form a slideway for one axially displaceable spring plate pack 10, the one Push piece 11 is carried with push rod 11a and that in Cross-section adapted to the shape of the pipe to be bent is.
  • the individual plates of the spring plate pack 10 are dependent on his position in relation to the curved support surface 8 more or less far shifted against each other, according to the Curvature of the support surface 8 are also bent. in the The result is one for the pipe to be bent Bend that corresponds to the desired inner curve.
  • the operation of the bending device according to the invention is the following:
  • Position swung back core template 2 align the Pipe guide 1 and the core template 2 with each other.
  • the Spring plate pack 10 is by means of the thrust piece 11 the push rod 11a into the straight area of the Pipe guide 1 withdrawn.
  • With the terminal strip 3 and on the front side of the mandrel tip 4 by the Traction device 6 held chuck 7 is to be bent Tube R inserted.
  • the pipe can also be used inserted mandrel removed from the pipe guide and the Then insert the mandrel. Then that will front end of the pipe R to be bent by means of the Terminal strip 3 between this, the straight outlet part the core template 2 and the inner clamping head 7 clamped.
  • the terminal block 3 released and the spring plate pack 10 withdrawn can be. Then the clamping head 7 over the traction means 6 back together with the mandrel and out of the bent Pulled tube R.
  • the spherical clamping head 7 acts smoothing and re-profiling if necessary. To a It can jam in the pipe bend 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 pipe and act on the other hand 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
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
DE10020728 2000-04-27
DE10020728A DE10020728C2 (de) 2000-04-27 2000-04-27 Biegevorrichtung für dünnwandige Metallrohre

Publications (3)

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

Citations (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
DE3641895A1 (de) * 1985-12-18 1987-06-19 Karl Marx Stadt Tech Hochschul 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

Patent Citations (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
DE3641895A1 (de) * 1985-12-18 1987-06-19 Karl Marx Stadt Tech Hochschul 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
DE50101528D1 (de) 2004-04-01
EP1149641B1 (fr) 2004-02-25
EP1149641A3 (fr) 2002-10-09
DE10020728A1 (de) 2001-11-08
DE10020728C2 (de) 2002-06-27

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