EP1149640B1 - 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
EP1149640B1
EP1149640B1 EP01108674A EP01108674A EP1149640B1 EP 1149640 B1 EP1149640 B1 EP 1149640B1 EP 01108674 A EP01108674 A EP 01108674A EP 01108674 A EP01108674 A EP 01108674A EP 1149640 B1 EP1149640 B1 EP 1149640B1
Authority
EP
European Patent Office
Prior art keywords
mandrel
tensioning
bending device
bending
core template
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
EP01108674A
Other languages
German (de)
English (en)
Other versions
EP1149640A3 (fr
EP1149640A2 (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 EP1149640A2 publication Critical patent/EP1149640A2/fr
Publication of EP1149640A3 publication Critical patent/EP1149640A3/fr
Application granted granted Critical
Publication of EP1149640B1 publication Critical patent/EP1149640B1/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

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 with swiveling core template Terminal block, and a mandrel that has a mandrel shaft and a mandrel part that is flexible in the area of the core template which, by means of an inner tension cable with the Mandrel shaft is spring-loaded.
  • 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).
  • Thin-walled means in this context pipes, their wall thickness based on the diameter and the bending radius small is, e.g. B. pipes with a wall thickness of about 0.8 mm a diameter of approx. 80 mm and a bending radius of approx. 120 mm.
  • a bending device of the type mentioned Art known (DE 197 07 228 A1), but not for thin-walled pipes in the sense described above, but for Pipes with very small diameters is determined.
  • This bending device consists of the flexible mandrel part several spherical joint members, which together with the Mandrel shaft resilient by means of the inner tension rope are tense. With this bending device that becomes bending pipe in the not to be bent before the flexible section of the mandrel lying only from the outside between the core template and the terminal block clamped. During the bending process, the mandrel is not taken, but is axially fixed. You would try thin-walled with such a bending device To bend pipes, then the pipe would be due to the necessary large radial clamping forces radially be pushed in.
  • 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.
  • the mandrel as flexible mandrel part has a coil spring that axially between a spherical clamping head and the Mandrel shaft is arranged, the tube to be bent between the clamping head and the core template with their Terminal block can be clamped in a force-locking manner.
  • the Clamping head firmly clamps the beginning of the pipe relatively short length because of the spherical shape of the clamping head has a high clamping force can be easily applied. Because in the area of If there is no bend at the beginning of the pipe, this plays here Constriction problem as in the prior art with spherical inserts used in the bending area Joint members, occurs, no role.
  • the spherical shape the chuck allows the chuck retracted over the curved tube without clamping become and thereby a smoothing effect and Post-profiling, in particular on the outer arch of the can exercise curved area, where because of the Bending process easily opening the coil spring Small constrictions develop between the open ones Naturally, turns cannot be completely prevented can. Overall, therefore, can be with the invention Bending device with a short clamping length of the Bend a thin-walled tube at the beginning of the tube without End product deviating from the circular cross section Cross sections are available.
  • the coil spring should unbent condition at least on the outside a smooth form cylindrical support surface.
  • the axial preload of the coil spring can be adjust that the pressure piece on a Compression spring is supported, which in turn on a Tensioning rope is supported.
  • 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. 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.
  • this runs Tension rope eccentrically through the tube on the inner arch along. This ensures that the section of the pipe to be bent firmly against the Inside of the inner coil of the coil spring pressed becomes.
  • 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.
  • the bending device consists of a fixed one straight pipe guide 1, an adjoining pivotable core template 2 with a terminal strip 3 and one arranged in the area of the core template 2 Mandrel 4 with it in the area of Pipe guide 1 located mandrel shaft 5.
  • the mandrel 4 consists of a flexible mandrel part 4a in the form of a Coil spring and a spherical clamping head 4b preferably two spherical limbs that are rigid Form unit.
  • the flexible part 4a of the mandrel 4 Clamping head 4b and the mandrel shaft 5 are axially over one Tensioning rope 6 biased with head piece 6a.
  • the operation of the bending device according to the invention is the following:
  • Figure 2 differs of that of Figure 1 only in the clamping head. So far Correspondences exist, are the same reference numerals used for the individual parts as in Figure 1.
  • the tensioning head 14 consists of a slotted, spherical outer ring 14a and a support and tensioning cone 14b, on which the spring-loaded head piece 6a of the inner tensioning cable 6 acts.
  • the operation of the bending device of the embodiment of FIG. 2 largely corresponds to that of the embodiment of FIG. 1, so that only the different effects of the clamping head are discussed:

Landscapes

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

Claims (6)

  1. Appareil à cintrer pour tubes métalliques à paroi mince (R), constitué d'un guide-tube droit (1), d'un gabarit à noyau (2) qui s'y raccorde et peut pivoter par rapport au guide-tube (1) avec une éclisse de serrage (3), et d'un mandrin (4) qui présente un arbre de mandrin (5) et une partie de mandrin (4a) souple dans la zone du gabarit à noyau (2), ladite partie étant serrée de manière élastique au moyen d'un câble tendeur interne (6) avec l'arbre de mandrin (5), caractérisé en ce que le mandrin (4) présente comme partie de mandrin souple (4a) un ressort hélicoïdal, qui est agencé axialement entre une tête de serrage sphérique (4b, 14) et l'arbre de mandrin (5), le tube à cintrer (R) pouvant être bloqué à force entre la tête de serrage (4b, 14) et le gabarit à noyau (2) avec son éclisse de serrage (3).
  2. Appareil à cintrer selon la revendication 1, caractérisé en ce que le ressort hélicoïdal (4a) forme au moins extérieurement à l'état non cintré une surface d'appui cylindrique lisse.
  3. Appareil à cintrer selon la revendication 1 ou 2, caractérisé en ce que l'arbre de mandrin (5) agissant en pièce de pression est en appui sur un ressort hélicoïdal (8) qui s'appuie, pour sa part, sur une vis de serrage (7) aboutée sur le câble de serrage (6).
  4. Appareil à cintrer selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la tête de serrage (14) est constituée d'une bague externe fendue (14a) et d'un cône d'appui et de serrage interne (14b), qui opère par auto-serrage sur la bague externe (14a) lors de l'opération de cintrage.
  5. Appareil à cintrer selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la tête de serrage (4b) est constituée de plusieurs éléments sphériques qui forment une structure rigide.
  6. Appareil à cintrer selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le câble de serrage (6) s'étend de manière excentrique à travers le tube (R) le long de l'arc interne du tube.
EP01108674A 2000-04-27 2001-04-06 Dispositif de pliage pour tuyaux métalliques à paroi mince Expired - Lifetime EP1149640B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10020727 2000-04-27
DE10020727A DE10020727C1 (de) 2000-04-27 2000-04-27 Biegevorrichtung für dünnwandige Metallrohre

Publications (3)

Publication Number Publication Date
EP1149640A2 EP1149640A2 (fr) 2001-10-31
EP1149640A3 EP1149640A3 (fr) 2002-10-09
EP1149640B1 true EP1149640B1 (fr) 2004-06-23

Family

ID=7640152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01108674A Expired - Lifetime EP1149640B1 (fr) 2000-04-27 2001-04-06 Dispositif de pliage pour tuyaux métalliques à paroi mince

Country Status (3)

Country Link
EP (1) EP1149640B1 (fr)
AT (1) ATE269763T1 (fr)
DE (2) DE10020727C1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10246977B4 (de) 2002-10-09 2007-06-28 Thyssenkrupp Steel Ag Vorrichtung zum 3D-Freiformbiegen von Profilen
US11577048B2 (en) 2019-03-01 2023-02-14 Argon Medical Devices, Inc. Medical device bending tool
CN110893427B (zh) * 2019-12-23 2024-04-26 江苏金鑫电器有限公司 一种螺旋焊管的弯曲工装

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1675574A (en) * 1927-04-25 1928-07-03 William K Mykins Plumber's lead-pipe-bending spring
US2760545A (en) * 1952-06-23 1956-08-28 Solemslie Sverre Pipe bending tool
DE3824312A1 (de) * 1988-07-18 1990-01-25 Rolf Dipl Ing Euler Vorrichtung zur formung von werkstuecken und betaetigungsvorrichtung
DE19707228A1 (de) * 1997-02-24 1998-08-27 Rudi Maas Biegedorn

Also Published As

Publication number Publication date
ATE269763T1 (de) 2004-07-15
EP1149640A3 (fr) 2002-10-09
DE10020727C1 (de) 2001-10-04
EP1149640A2 (fr) 2001-10-31
DE50102653D1 (de) 2004-07-29

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