EP1276573B1 - Dispositif de cintrage de tubes metalliques a parois minces - Google Patents

Dispositif de cintrage de tubes metalliques a parois minces Download PDF

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Publication number
EP1276573B1
EP1276573B1 EP01929341A EP01929341A EP1276573B1 EP 1276573 B1 EP1276573 B1 EP 1276573B1 EP 01929341 A EP01929341 A EP 01929341A EP 01929341 A EP01929341 A EP 01929341A EP 1276573 B1 EP1276573 B1 EP 1276573B1
Authority
EP
European Patent Office
Prior art keywords
mandrel
bending
bending device
clamping head
mandrel tip
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
EP01929341A
Other languages
German (de)
English (en)
Other versions
EP1276573A1 (fr
Inventor
Thomas Flehmig
Uwe Kneiphoff
Thomas Neuhausmann
Martin Kibben
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 EP1276573A1 publication Critical patent/EP1276573A1/fr
Application granted granted Critical
Publication of EP1276573B1 publication Critical patent/EP1276573B1/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
    • B21D9/073—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only with one swinging forming member

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 flexible mandrel tip and one on the mandrel tip subsequent and firmly connected to it as well as in the Pipe guide axially fixed mandrel shaft (see e.g. US-A-4 481 803).
  • Bending devices of this and similar kind for thin-walled tubes are known (magazine “Werkstatt and operation 104 (1971) 4, pages 271 to 274 ", "Prevention of wrinkles and buckling thin-walled tubes during bending "by Prof. Dr.-Ing. G. ⁇ hler, Bad Dürkheim).
  • "Thin-walled” means in this connection pipes, the wall thickness of which referred to the diameter and the bending radius is small, e.g. B. Pipes with a wall thickness of approx. 0.8 mm at one Diameter of approx. 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, the one with a short clamping length of the pipe start gets along and the making a curvature with over the entire length allows circular cross-section.
  • An optimal inside support with Slices can be set with a specifically adjustable Achieve flexibility when using elastomer washers different modulus of elasticity can be used.
  • in the further area to the Dornspitze can be certain radial compressibility quite advantageous for be the result of the bend, because it usually means one better flexibility is connected.
  • the clamping head can be made from a slotted, spherical outer ring and an inner support and Clamping cone exist, which is self-tightening during the bending process acts on the outer ring.
  • the pulling force exerted on the tube during the bending process transfer the clamping ring and the clamping cone 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. because of the middle Constriction and rounding also occurs in this If there is no jamming in the elbow when Withdraw the clamping head. This solution stands out with a simple construction, especially by a optimal guidance and particularly good Post-profiling properties.
  • the bending device according to Figure 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 mandrel tip 4 and one itself then firmly on the mandrel tip 4 attached, located in the area of the pipe guide 1 Mandrel shaft 5.
  • the mandrel tip 4 and the mandrel shaft 5 are axially fixed during the bending process.
  • the thorn tip 4 consists of a solid cylinder made of elastomer flexible but with regard to the deformability of the Pipe material is radially practically incompressible. In the In practice, hardships of the order of 95 Shore A are likely up to 50 Shore D for steel pipes. to The full cylinder can improve flexibility bendable section above its neutral fiber F must be slotted towards the outer arch, namely axially Slits S1 (Fig. 1) or radial slots S2 (Fig. 2) exhibit.
  • Towards the core template 2 and thus towards the inner arch eccentrically offset runs through the mandrel tip 4 and the mandrel shaft 5 as a traction means 6 a rope.
  • the traction device 6 is axially fixed in the mandrel shaft 5 and sits with little play in the mandrel tip 4, what for the radial Incompressibility of the mandrel tip 4 is cheap, it is because that a certain compressibility in favor of one increased flexibility especially towards the Dornspitze 4 located area possibly even with further axial Bores of different cross sections and of different depths and radially far enough away from the outside circumference is consciously accepted, which at inherently very incompressible elastomer could be practical.
  • a thrust washer 8 in a groove on the Traction device 6 is axially fixed and axial evasion of the elastomer material of the full cylinder with the consequence a decrease in diameter.
  • the traction device 6 extends further through a clamping head 7. Between the clamping head 7 and a stop 6a sits on the Traction means 6 a compression spring 9.
  • the clamping head 7 is made from a slotted, spherical outer ring 7a and one inner support and clamping cone 7b. Between the outer ring 7a and the straight outlet of the core template 2 and the Terminal strip 3, the pipe R to be bent can be short Clamp length.
  • the core template 2 turns counterclockwise pivoted, then the core template 2 and the clamp 3 held tube R carried over pulled the axially fixed mandrel 4 away. Because of the conical seat of the clamping head 7 ensure that acting self-tensioning on the outer ring 7a Tractive forces that the clamping force is increased.
  • the Tube R reaches the bent area of the core template 2 and the initially straight mandrel tip 4 is becoming more and more bent, the tube R on its inner wall at Bending process in the active bending area is supported without gaps is so that no wrinkles or constrictions form can.
  • Figure 2 differs of that of Figure 1 only in the clamping head and in the traction. As far as there are similarities, they are the same Reference symbols for the individual parts as in FIG. 1 used.
  • the clamping head 17 consists of several, in particular two rigidly connected, spherical limbs attached to the a rope is connected as a traction means 16.
  • the clamping head 17 could also consist of a one-piece, rigid, short body with a bellows-like Outer contour exist.
  • the traction means 16 is movable passed through the mandrel tip 4 and the mandrel shaft 5. At the Swiveling it can be eased. For the Retrieve engages the return force on the outside guided traction means 16. First, the Retractable head 17 withdrawn through the tube until it on the End of the mandrel tip. Then the Clamping head 17 together with the mandrel tip 4 and the Spine shaft 5 withdrawn.
  • the pipe bend can spherical links because of their good axial guidance axially offset places and their shape does not come. Their roundings and their central constriction give on the one hand enough space for the bent tube and on the other hand, have a profiling effect when retrieving the tube R. It is understood that with more than two spherical limbs, e.g. B three links the middle link spring back with its contour at least on the inner arch got to. The same applies to a bellows-like one Chuck.

Landscapes

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

Claims (11)

  1. Dispositif de cintrage de tubes métalliques ( R ) à parois minces à partir d'un élément de guidage de tube droit (1), d'un gabarit à noyau (2) pourvu d'une réglette de bornier (3), le gabarit se raccordant à celui-ci et pouvant basculer par rapport à l'élément de guidage (1), et d'une broche munie d'une pointe de broche (4) flexible dans la zone du gabarit à noyau (2), et d'une tige de broche (5) se raccordant à la pointe (4) de broche et fermement reliée à celle-ci et également fixée axialement dans l'élément de guidage de tube (1), caractérisé en ce que la pointe (4) de broche est formée d'un cylindre plein en un élastomère, pratiquement incompressible radialement, adapté dans son contour extérieur au contour intérieur du tube métallique ( R ) à cintrer, lequel cylindre s'étend seulement sur le segment de début de l'arc de cintrage, et en ce que dans la zone du gabarit à noyau (2) et de sa réglette à bornier (3) il est prévu une tête de tension sphérique (7,17) pouvant être insérée dans le tube métallique ( R ), qui est mobile dans la zone de basculement du gabarit à noyau (2) par rapport à la pointe (4) de broche, et est raccordée à un moyen de traction (6, 16) conformé comme un élément de rappel.
  2. Dispositif de cintrage selon la revendication 1, caractérisé en ce que la pointe (4) de broche conformée en cylindre plein est fendue radialement dans la zone de l'arc de cintrage, ou axialement autour de l'arc de cintrage à la façon d'une broche à lamelles.
  3. Dispositif de cintrage selon la revendication 2, caractérisé en ce que la pointe (4) de broche conformée en cylindre plein est formée, dans la zone de face frontale, par des plaques d'élastomère maintenues l'une sur l'autre par pré-contrainte axiale.
  4. Dispositif de cintrage selon la revendication 3, caractérisé en ce que les plaques d'élastomère présentent des modules d'élasticité différents.
  5. Dispositif de cintrage selon l'une des revendications 1 à 4, caractérisé en ce que sur son côté frontal la pointe (4) de la broche est pourvue d'une plaque de compression (8).
  6. Dispositif de cintrage selon l'une des revendications 1 à 5, caractérisé en ce que, d'une part le moyen de traction (6) est flexible au moins dans l'arc de cintrage, s'étend par la pointe (4) de broche et est fixé pratiquement sans jeu dans la pointe (4) de broche et/ou à la tige (5) de la broche, et d'autre part est mobile jusqu'à une butée (6a) en étant guidé par la tête de tension (7).
  7. Dispositif de cintrage selon la revendication 6, caractérisé en ce qu'un ressort de compression (9) est inséré entre la tête de tension (7) et la butée (6a).
  8. Dispositif de cintrage selon l'une quelconque des revendications 1 à 5, caractérisé en ce que, d'une part le moyen de traction (16) est flexible au moins dans l'arc de cintrage et mobile par la pointe (4) de la broche et par la tige (5) de la broche, et d'autre part est raccordé à la tête de tension (17).
  9. Dispositif de cintrage selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la tête de tension (7) est constituée d'une bague extérieure (7a) fendue et d'un cône intérieur (7b) d'appui et de tension, qui lors du processus de cintrage agit par détente automatique sur la bague extérieure (7a).
  10. Dispositif de cintrage selon l'une des revendications 1 à 9, caractérisé en ce que la tête de tension (17) est constituée de plusieurs éléments sphériques qui forment une unité constructive rigide.
  11. Dispositif de cintrage selon l'une quelconque des revendications 1 à 10, caractérisé en ce que le moyen de traction (6) s'étend sur l'arc de cintrage de façon excentrée par le tube métallique ( R ).
EP01929341A 2000-04-27 2001-02-10 Dispositif de cintrage de tubes metalliques a parois minces Expired - Lifetime EP1276573B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10020725A DE10020725B4 (de) 2000-04-27 2000-04-27 Biegevorrichtung für dünnwandige Metallrohre
DE10020725 2000-04-27
PCT/EP2001/001479 WO2001083130A1 (fr) 2000-04-27 2001-02-10 Dispositif de cintrage de tubes metalliques a parois minces

Publications (2)

Publication Number Publication Date
EP1276573A1 EP1276573A1 (fr) 2003-01-22
EP1276573B1 true EP1276573B1 (fr) 2004-01-14

Family

ID=7640151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01929341A Expired - Lifetime EP1276573B1 (fr) 2000-04-27 2001-02-10 Dispositif de cintrage de tubes metalliques a parois minces

Country Status (11)

Country Link
US (1) US6941787B2 (fr)
EP (1) EP1276573B1 (fr)
JP (1) JP3636444B2 (fr)
AT (1) ATE257751T1 (fr)
AU (1) AU2001256152A1 (fr)
BR (1) BR0110320A (fr)
CA (1) CA2405681C (fr)
CZ (1) CZ296545B6 (fr)
DE (2) DE10020725B4 (fr)
ES (1) ES2213694T3 (fr)
WO (1) WO2001083130A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4031827B2 (ja) * 2002-10-10 2008-01-09 三桜工業株式会社 二重管の曲げ方法
KR200461968Y1 (ko) 2010-01-14 2012-08-17 김상인 프레싱 타입 파이프 밴딩장치
CN102886406B (zh) * 2012-10-09 2015-06-10 沈阳黎明航空发动机(集团)有限责任公司 一种导管成形用软芯棒
CN103341536B (zh) * 2013-06-17 2015-04-01 中国航空工业集团公司北京航空制造工程研究所 一种管材绕弯内支撑装置及管材绕弯方法
CN108273889B (zh) * 2018-01-22 2023-06-23 南昌航空大学 一种小弯曲半径管差温推弯成形的方法及装置
CN111822559B (zh) * 2020-06-30 2024-06-21 宁波敏实汽车零部件技术研发有限公司 一种饰条仿锥体旋转弯曲机构
CN112207164A (zh) * 2020-10-20 2021-01-12 中建五局安装工程有限公司 一种给水铜管热弯弯管装置
CN113020355B (zh) * 2021-04-07 2023-06-16 苏州帝航防护设施有限公司 一种薄壁金属管折弯内衬装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1401394A (en) * 1920-08-17 1921-12-27 Plains Iron Works Company Pipe-bending machine
DE715297C (de) * 1938-07-02 1941-12-18 Hilgers Maschinen Und App Baua Vorrichtung zum Einfuehren der Rohre, insbesondere solcher grosser Abmessungen, in Biegemaschinen mit Dornkopf und Dornstange
US2996100A (en) * 1957-04-08 1961-08-15 Dravo Corp Method and apparatus for bending pipe to short radh with minimum thinning of the outer wall thickness at the bend
US3279237A (en) 1963-05-20 1966-10-18 Mueller Brass Co Mandrel for bending tubing
DE1552934C3 (de) * 1966-07-27 1974-01-17 Mueller Brass Co., Port Huron, Mich. (V.St.A.) Dorn zum Biegen eines Rohres
US3580044A (en) * 1969-03-24 1971-05-25 Edwin A De Voss Tube bending mandrel
US4493203A (en) 1983-01-26 1985-01-15 Crutcher Resources Corporation Resilient internal mandrel
US4481803A (en) * 1983-03-18 1984-11-13 Teledyne Industries, Inc. Method for eliminating distortion at the end of a tube bend

Also Published As

Publication number Publication date
BR0110320A (pt) 2003-12-30
JP3636444B2 (ja) 2005-04-06
DE10020725A1 (de) 2001-11-08
WO2001083130A1 (fr) 2001-11-08
ES2213694T3 (es) 2004-09-01
JP2003531725A (ja) 2003-10-28
CZ20023541A3 (cs) 2003-11-12
AU2001256152A1 (en) 2001-11-12
CZ296545B6 (cs) 2006-04-12
US6941787B2 (en) 2005-09-13
DE50101331D1 (de) 2004-02-19
DE10020725B4 (de) 2005-06-30
ATE257751T1 (de) 2004-01-15
EP1276573A1 (fr) 2003-01-22
CA2405681C (fr) 2006-08-15
US20030154756A1 (en) 2003-08-21
CA2405681A1 (fr) 2001-11-08

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