EP2189229B1 - Procédé destiné à fermer l'extrémité de tuyaux dotés d'une section transversale rectangulaire - Google Patents

Procédé destiné à fermer l'extrémité de tuyaux dotés d'une section transversale rectangulaire Download PDF

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Publication number
EP2189229B1
EP2189229B1 EP20080105854 EP08105854A EP2189229B1 EP 2189229 B1 EP2189229 B1 EP 2189229B1 EP 20080105854 EP20080105854 EP 20080105854 EP 08105854 A EP08105854 A EP 08105854A EP 2189229 B1 EP2189229 B1 EP 2189229B1
Authority
EP
European Patent Office
Prior art keywords
pipe
flanging
gap
section
rollers
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.)
Not-in-force
Application number
EP20080105854
Other languages
German (de)
English (en)
Other versions
EP2189229A1 (fr
Inventor
Vincent Dipl. Ing. ETHZ Cordey
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.)
Neotech-Holding AG
NEOTECH HOLDING AG
Original Assignee
Neotech-Holding AG
NEOTECH HOLDING 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 Neotech-Holding AG, NEOTECH HOLDING AG filed Critical Neotech-Holding AG
Priority to EP20080105854 priority Critical patent/EP2189229B1/fr
Publication of EP2189229A1 publication Critical patent/EP2189229A1/fr
Application granted granted Critical
Publication of EP2189229B1 publication Critical patent/EP2189229B1/fr
Not-in-force legal-status Critical Current
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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/04—Reducing; Closing
    • B21D41/045—Closing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/04—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2220/00—Closure means, e.g. end caps on header boxes or plugs on conduits

Definitions

  • the present invention relates to a method for closing ends of pipes having a substantially rectangular cross-section by rolling the edge portions at the pipe end by at least one roll with central portion by the edges of the pipe end are folded against the inside, after which the remaining gap is welded.
  • the tubes to which the method according to the invention refers are those of rectangular cross-section.
  • these tubes are referred to herein as “rectangular tubes”.
  • the rectangular section has two wider sides and two narrower sides (the wider sides are generally at least five times wider than the narrower sides). These ratios are applied to the associated surfaces, and so in this document the two opposing surfaces, which in cross-section are the longer (ie wider) sides, are referred to as “long side surfaces” and the other two surfaces, ie the shorter (ie narrower) surfaces, referred to as "short-side surfaces".
  • the front ends of flat tubes are closed.
  • the front and the back each form a flat surface
  • the top and the bottom are formed as curved surfaces.
  • the gap a curved surface is formed, which corresponds to the curved surface of the top and bottom of the tube.
  • the corner areas are also formed with the appropriate curvature. If instead of these flat tubes rectangular tubes are used, in which in addition to the front and rear side and the upper and lower sides are formed by flat surfaces, the previously described method for closing the front ends of these tubes can not be used, as here a curved end face as the conclusion of the tube in aesthetic terms is not accepted.
  • the object of the present invention is accordingly to provide a method which causes the closure of a substantially rectangular tube by a flat end face, without an additional workpiece, i. a cover or similar element is required.
  • inventive method which is defined in independent claim 1, solves the task in an elegant way.
  • Particular or preferred embodiments of the method are the subject of dependent claims.
  • the inventive method provides on the front side of the substantially rectangular tubes a flat closure, which must be reworked usually only for smoothing the weld or solder seam. Only with difficult deformable material, such as relatively thick-walled pipes, it may be necessary to rework the end face and possibly also the subsequent end portions of the four pipe surfaces by upsetting to obtain exactly flat and aligned surfaces or restore.
  • Fig. 1 a plan view or a side view, depending on whether the tube 10 is clamped for processing horizontally or vertically.
  • the edge regions of the long sides 13 and the short sides 12 of the pipe end 11 are processed by two flanging rollers 14 and 16.
  • the rollers 14 and 16 are respectively applied to the narrow side of the tube 10.
  • the roller 14 which is rotatably mounted in a yoke 18, moved to the contact against the tube 10 and thereafter passes along the long-side edge portions 13A, as shown by the arrow X. During this traverse, the respective edge portions 13A of the long sides and those (12A) of the short sides are machined, as will be described later.
  • the crimping roller 14 has reached the end point of the stick X, it is retracted, and the operations just described are repeated, but now the roller 16 comes into action and performs the processing path Y.
  • the two rollers 14 and 16 may be arranged in the same yoke 18. But it is also possible that they have separate bearings and drives.
  • this machining could also be done with a roller that could run the entire path (X + Y) for machining.
  • Fig. 2 the roller 14 is shown during the machining process.
  • the roller 16 is formed in an identical manner.
  • the roller 14 has centrally a circumferential groove 20, which is named in this document as a groove.
  • the cross-section of the groove 20 is substantially semicircular, with the semicircle 20A, as shown, being arranged basically at an entrance with initially parallel walls 20B.
  • FIGS. 3A and 3B show the machined with the rollers pipe end 13 of the tube 10.
  • Fig. 3A It can be seen that the short-side edge regions 17 are folded against the inside.
  • Fig. 3B the folded long side edge regions 13A and the folded short side edge regions 17 can be seen, whereby the gap 22 is formed. Both the long-side edge regions 13A and the short-side edge regions 17 have been folded over at an angle of approximately 90 °.
  • FIGS. 7 and 8 a further embodiment of the first stage of the inventive method is shown. This embodiment differs from the previously described only in the processing path of the crimping rollers 14 and 16.
  • flanging rollers 14 and 16 are at the beginning of processing in contact with the end portions 12A and 12B, and at a distance Z from the straight-cut tube end, which corresponds approximately to the width of the narrow sides of the tube.
  • These paths are in Fig. 7 denoted by X "and Y", respectively;
  • the ends of the two opposite paths X "and Y" intersect. It seems that with this variant of the method better shaping is achieved when folding over the narrow sides of the pipe end.
  • the gap 22 ( Fig. 2, 3B . 7, 8 ), which has remained after one of the described first stages of the method, is now closed, and the round surface areas 13A and 17 are leveled.
  • the first processing step is repeated, but this time with other flanging rollers.
  • This is on the Fig. 4, Fig. 5 and the FIGS. 6A and 6B referenced in their presentation the Fig. 1 to 3B correspond.
  • the Fig. 4 to 6B For the same parts or elements the same reference numbers as in FIG Fig. 1 to 3B and for similar parts or elements also the same reference numerals, but with an apostrophe (') used.
  • the tube 10 ' which is partially closed with rounded end faces 11', is then subjected to the action of the two flanging rollers 14 'and 16' along the machining paths X 'and Y'.
  • the still remaining gap 22 represents only a leakage line, which in the third step of the inventive method by soldering (eg brazing) or, as is preferred, is sealed by welding.
  • soldering eg brazing
  • the welding or soldering seam is finally, if desired, smoothed by sanding. But this is only necessary if the welding or soldering has created a visible, applying and uneven seam.
  • FIG Figs. 9A and 9B This optionally carried out process step is shown schematically in FIG Figs. 9A and 9B shown. It can be seen in the tube 10 ', which was clamped between the mold blocks 24; In the process, these mold blocks, which are provided on one side with a U-shaped central cutout, have moved over the narrow sides 12 of the tube 10 'in the direction of the arrows C.
  • the rectangular tubes, which are closed according to the invention are steel tubes with a relatively small wall thickness, as used, for example, for radiators.
  • the method according to the invention can also be applied to other tubes made of deformable materials, for example to tubes made of thermoplastic materials.
  • the inventive method thus allows the production of a dense, aesthetically pleasing closure of a tube having a substantially rectangular cross-section in a simple manner, without additional workpieces such as covers are required whose attachment and attachment still require at least two additional steps.
  • the pipe closure can therefore only be generated quickly and very inexpensively.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)

Claims (9)

  1. Procédé pour fermer l'extrémité (11) d'un tuyau (10) ayant une section transversale sensiblement rectangulaire par roulage des régions de bord du côté long (13A) et des régions de bord du côté court (12A) de ladite extrémité de tuyau en utilisant des rouleaux de pliage (14, 16; 14', 16'), dans lequel lesdites régions de bord (12A, 13A) sont rabattues vers le côté intérieur dudit tuyau et, à la fin, la fente restante (22) est fermée par soudage,
    caractérisé en ce que le procédé consiste à:
    rouler ladite extrémité de tuyau (11) vers l'intérieur en utilisant au moins un rouleau de pliage (14, 16) muni d'un creux arrondi (20) et former une fermeture de tuyau avec un profil extérieur arrondi (17; 13A),
    ensuite, rouler ladite fermeture formée en utilisant au moins un rouleau de pliage (14', 16') ayant une section transversale sensiblement rectangulaire et former une fermeture de tuyau avec une face d'extrémité plane (13A'), et
    fermer ladite fente restante (22) entre lesdites régions de bord rabattues dudit tuyau.
  2. Procédé selon la revendication 1, caractérisé en ce que deux rouleaux de pliage (14, 16; 14', 16') sont utilisés, chacun attaquant depuis les côtés étroits (12) dudit tuyau, et en ce que les parcours de travail (X, Y; X', Y') desdits rouleaux de pliage (14, 16; 14', 16') se terminent au-delà de l'axe central dudit tuyau (10; 10'), ce par quoi ils se chevauchent, lesdits deux rouleaux de pliage (14, 16; 14', 16') étant utilisés l'un après l'autre.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le traitement lors de la première étape s'effectue en ce que lesdits rouleaux de pliage (14, 16) ayant un creux (20) arrondi (20A) au fond sont d'abord placés sur les côtés étroits dudit tuyau (12) au niveau de l'extrémité de tuyau (11) et sont ensuite déplacés dans un quart de cercle vers le centre de ladite extrémité de tuyau, afin que le courbage, vers l'intérieur, des extrémités des côtés étroits (12) dudit tuyau soit guidé par lesdits rouleaux de pliage (14; 16).
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que ladite fente restante (22) sur la face de fermeture plane (13A') produite lors de la seconde étape est fermée par soudage.
  5. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que ladite fente restante (22) sur la face de fermeture plane (13A') produite lors de la seconde étape est fermée par brasage.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que le cordon de soudure ou de brasage sur ladite face de fermeture (13A') formée est rendue lisse par polissage.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que la section transversale arrondie (20A) au fond du creux (20) desdits rouleaux de pliage (14, 16) utilisés lors de la première étape est sensiblement semi-circulaire.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que la section transversale rectangulaire (20A') au fond du creux (20') desdits rouleaux de pliage (14', 16') utilisés lors de la seconde étape est sensiblement quadratique.
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce que la région d'extrémité dudit tuyau fermé est soumise à un façonnage par pressage par le biais de blocs de façonnage (24) en vue du calibrage et de l'égalisation de cette-dernière.
EP20080105854 2008-11-24 2008-11-24 Procédé destiné à fermer l'extrémité de tuyaux dotés d'une section transversale rectangulaire Not-in-force EP2189229B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20080105854 EP2189229B1 (fr) 2008-11-24 2008-11-24 Procédé destiné à fermer l'extrémité de tuyaux dotés d'une section transversale rectangulaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20080105854 EP2189229B1 (fr) 2008-11-24 2008-11-24 Procédé destiné à fermer l'extrémité de tuyaux dotés d'une section transversale rectangulaire

Publications (2)

Publication Number Publication Date
EP2189229A1 EP2189229A1 (fr) 2010-05-26
EP2189229B1 true EP2189229B1 (fr) 2012-08-01

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ID=42034565

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Application Number Title Priority Date Filing Date
EP20080105854 Not-in-force EP2189229B1 (fr) 2008-11-24 2008-11-24 Procédé destiné à fermer l'extrémité de tuyaux dotés d'une section transversale rectangulaire

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EP (1) EP2189229B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102688925A (zh) * 2012-06-04 2012-09-26 扬州诚德钢管有限公司 高压无缝大口径钢瓶旋压收口机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104511543B (zh) * 2013-09-30 2017-03-15 珠海格力电器股份有限公司 用于管件的封口装置
CN105149466B (zh) * 2015-08-21 2017-08-04 浙江宏倍斯智能科技股份有限公司 一种扁形圆管的封口设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH657081A5 (de) * 1982-12-17 1986-08-15 Neotech Holding Ag Verfahren und vorrichtung zur herstellung eines wasserdichten radiatorenelementes.
CH669918A5 (en) 1986-04-15 1989-04-28 Neotech Holding Ag Radiator element made from flat tube - has open ends closed by rollers to provide rounded end wall
CH685984A5 (de) * 1993-10-06 1995-11-30 Runtal Holding Co Sa Vorrichtung zum Verschliessen der Rohrenden von Flachrohren.
DE502005005557D1 (de) * 2005-10-19 2008-11-13 Neotech Holding Ag Verfahren zum Verschliessen von Stirnenden von im wesentlichen rechteckförmigen Rohren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102688925A (zh) * 2012-06-04 2012-09-26 扬州诚德钢管有限公司 高压无缝大口径钢瓶旋压收口机

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