EP1777019A1 - Méthode pour fermer les extrémités de tubes ayant une section transversale essentiellement rectangulaire - Google Patents

Méthode pour fermer les extrémités de tubes ayant une section transversale essentiellement rectangulaire Download PDF

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Publication number
EP1777019A1
EP1777019A1 EP05109749A EP05109749A EP1777019A1 EP 1777019 A1 EP1777019 A1 EP 1777019A1 EP 05109749 A EP05109749 A EP 05109749A EP 05109749 A EP05109749 A EP 05109749A EP 1777019 A1 EP1777019 A1 EP 1777019A1
Authority
EP
European Patent Office
Prior art keywords
gap
edge regions
tool
short
pipe end
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
EP05109749A
Other languages
German (de)
English (en)
Other versions
EP1777019B1 (fr
Inventor
Hans Schalch
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 DE502005005557T priority Critical patent/DE502005005557D1/de
Priority to AT05109749T priority patent/ATE409532T1/de
Priority to EP05109749A priority patent/EP1777019B1/fr
Publication of EP1777019A1 publication Critical patent/EP1777019A1/fr
Application granted granted Critical
Publication of EP1777019B1 publication Critical patent/EP1777019B1/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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/04—Reducing; Closing
    • B21D41/045—Closing

Definitions

  • the present invention relates to a method for closing ends of substantially rectangular tubes by rolling the longitudinal edge portions and the short-side edge portions of the tube end by at least one roller, after which the remaining gap is sealed.
  • the front ends of flat tubes are closed.
  • the front and the rear each form a flat surface
  • the top and bottom are formed as curved surfaces.
  • the object of the present invention is therefore to provide a method for closing front ends of substantially To create rectangular tubes, with which the tube end faces are obtained, which are also formed as flat surfaces.
  • the solution of this object is achieved in that with at least one roller, the two longitudinal edge portions of the pipe end and the short-side edge portions of the pipe end are folded against the inside, that in the resulting gap a cover is inserted and with the edges of the longitudinal edge portions and the short-side edge areas is welded.
  • the so closed front end of the tube if desired, be ground flat.
  • the longitudinal edge regions and the short-side edge regions are folded over by approximately 90 degrees.
  • the desired edges are formed, which form the boundary of the flat frontal surface and on which the cover can be inserted in a simple manner and welded to these edge regions.
  • a further advantageous embodiment of the invention is achieved in that in the gap formed by rolling a tool is introduced, with which the edges of the inserted longitudinal edge regions of the pipe end are calibrated, after which the tool is pulled out again.
  • the advantage is achieved that the width of the gap for all thus machined with the roller pipe ends has an identical size, whereby a pre-fabricated to measure cover can be used.
  • the tool is spread in the gap formed by rolling in a direction parallel to the longitudinal calibrated edges and becomes one each projecting part of the two short-side inlaid edge portions punched out when pulling out the tool.
  • a gap of precisely defined size in both the longitudinal and in the transverse direction is obtained, the prefabricated covers can thus be inserted optimally fitting in this gap.
  • a die prior to pulling the tool out of the gap from the outside to the surface of the pipe end, a die is placed with an opening corresponding to the punch, whereby the punching can be performed in an optimal and accurate manner.
  • a further advantageous embodiment of the invention is that the cover, which is inserted into the gap, has an outer shape corresponding to this gap, which outer shape is still provided with a peripheral edge.
  • this cover can be inserted exactly fitting in the gap, wherein the peripheral edge is supported on the edge regions of the pipe end.
  • the front end of the tube closed with this cover can advantageously be welded by means of resistance welding, which process can be carried out in a simple manner.
  • Figs. 1a and 1b the pipe end 1 of a cut rectangular tube 2 is shown, whose end is not yet processed.
  • the longitudinal edge regions 5 and 6 and the short-side edge regions 7 and 8 of the tube end are processed by two rollers 3 and 4.
  • the rollers 3 and 4 are respectively applied to the narrow side of the tube, initially moved along the tube 2 until they have reached the respective short-side edge region 7 and 8 are guided around these two edge regions 7 and 8 and run thereafter along the longitudinal edge portions 5 and 6, as shown by the arrows 9 and 10.
  • the corresponding edge regions 7 and 8 or 5 and 6 are processed, as will be described below. It is clear that the one roller 3, after the other roller 4 has moved back again, is moved even further along the longitudinal edge regions 5 and 6, so that the entire length of these edge regions can be processed thereby.
  • this machining could also be done with a roller that could run the entire path for machining.
  • the roller 3 is shown during the machining process.
  • the roller 4 is formed in an identical manner.
  • the roller 3 has centrally a circumferential groove 11, which circumferential groove 11 is provided at the bottom of the groove 11 with rounded portions 12 which have a radius which corresponds approximately to the thickness of the wall of the pipe 2 to be machined.
  • FIG. 3a and 3b show the processed with the rollers pipe end 1 of the tube 2.
  • the short-side edge portions 7 and 8 are folded against the inside.
  • the folded-over longitudinal edge regions 5 and 6 and the folded short-side edge regions 7 and 8 can be seen, whereby the gap 13 is formed. Both the longitudinal edge regions 5 and 6 as well as the short-side edge regions 7 and 8 have been folded by an angle of approximately 90 °.
  • a tool 14 is introduced into the gap 13 formed thereby.
  • This tool 14 has on its longitudinal sides 15 and 16 on a calibration 17, with which the longitudinal side Edge areas that are folded, are calibrated so that the gap 13 receives a predetermined width.
  • the tool 14 which is inserted into the gap 13, spreads before pulling out, in parallel to the longitudinal calibrated edges 5 and 6.
  • the ends of the spread tool 14 are as a punch 18 formed, which pass under a respective protruding part 19 of the two short-side inserted edge regions 7 and 8, as can be seen from Fig. 5a.
  • a die tool 20 is placed on the pipe end 1 of the tube 2 in an advantageous manner.
  • This die tool 20 comprises an opening 21 which is designed to correspond to the shape of the punching tools 18.
  • the tool 14 can be pulled out of the gap 13 of the pipe end 1 of the tube 2. During this extraction, the projecting portions 19 of the short-side edge portions 7 and 8 are punched, the punched portions are removed from the tube 2 by the tool. Thereafter, the tool 14 and the die 20 can be removed from the pipe end 1 of the tube 2.
  • a precisely defined gap 13 is obtained at the pipe end 1 of the pipe 2, as shown in FIG. 5b.
  • the longitudinal edge regions 5 and 6 have been calibrated to a predetermined width over a length which is represented by the arrow 21; the short-side edge regions 7 and 8 have likewise been brought to a predetermined dimension by the punching process, in each case by the double arrows 22 is shown.
  • the gap 13 thus has a precisely predetermined shape, which is required for further processing.
  • a cover 22 can be inserted.
  • This cover 22 has an outer mold 23, which corresponds to the outer shape of the gap 13, as can be seen in FIG. 5b.
  • This outer shape 23 of the cover 22 is still provided with a peripheral edge 24.
  • the cover 22 is then inserted into the gap 13 so that the outer mold 23 comes to lie in the gap 13, while the peripheral edge 24 is supported on the inserted longitudinal edge regions 5, 6 and the short-side edge regions 7, 8.
  • cover 22 tube 2 is then placed in a resistance welding system, in which the cover 22 is welded to the pipe end 1 of the tube 2.
  • a resistance welding system in which the cover 22 is welded to the pipe end 1 of the tube 2.
  • another suitable welding method could be used instead of the resistance welding process.
  • the thus welded end face of the tube 2 can then, if desired, be flattened, thereby obtaining the desired closed front end of a rectangular tube 2, as shown schematically in Fig. 6b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat Treatment Of Articles (AREA)
  • Piles And Underground Anchors (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
EP05109749A 2005-10-19 2005-10-19 Méthode pour fermer les extrémités de tubes ayant une section transversale essentiellement rectangulaire Expired - Lifetime EP1777019B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE502005005557T DE502005005557D1 (de) 2005-10-19 2005-10-19 Verfahren zum Verschliessen von Stirnenden von im wesentlichen rechteckförmigen Rohren
AT05109749T ATE409532T1 (de) 2005-10-19 2005-10-19 Verfahren zum verschliessen von stirnenden von im wesentlichen rechteckförmigen rohren
EP05109749A EP1777019B1 (fr) 2005-10-19 2005-10-19 Méthode pour fermer les extrémités de tubes ayant une section transversale essentiellement rectangulaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05109749A EP1777019B1 (fr) 2005-10-19 2005-10-19 Méthode pour fermer les extrémités de tubes ayant une section transversale essentiellement rectangulaire

Publications (2)

Publication Number Publication Date
EP1777019A1 true EP1777019A1 (fr) 2007-04-25
EP1777019B1 EP1777019B1 (fr) 2008-10-01

Family

ID=35517573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05109749A Expired - Lifetime EP1777019B1 (fr) 2005-10-19 2005-10-19 Méthode pour fermer les extrémités de tubes ayant une section transversale essentiellement rectangulaire

Country Status (3)

Country Link
EP (1) EP1777019B1 (fr)
AT (1) ATE409532T1 (fr)
DE (1) DE502005005557D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2189229A1 (fr) * 2008-11-24 2010-05-26 Neotech-Holding AG Procédé destiné à fermer l'extrémité de tuyaux dotés d'une section transversale rectangulaire
CN105057479A (zh) * 2015-08-25 2015-11-18 嘉兴永发电子有限公司 金属管类的封口方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2691818A (en) * 1952-03-31 1954-10-19 Jr Dean M Rockwell Method and apparatus for use in making valve protector caps for compressed gas cylinders
JPS59120328A (ja) * 1982-12-27 1984-07-11 Honda Motor Co Ltd 角パイプ端部の成形装置
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.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2691818A (en) * 1952-03-31 1954-10-19 Jr Dean M Rockwell Method and apparatus for use in making valve protector caps for compressed gas cylinders
JPS59120328A (ja) * 1982-12-27 1984-07-11 Honda Motor Co Ltd 角パイプ端部の成形装置
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.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 240 (M - 336) 6 November 1984 (1984-11-06) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2189229A1 (fr) * 2008-11-24 2010-05-26 Neotech-Holding AG Procédé destiné à fermer l'extrémité de tuyaux dotés d'une section transversale rectangulaire
CN105057479A (zh) * 2015-08-25 2015-11-18 嘉兴永发电子有限公司 金属管类的封口方法

Also Published As

Publication number Publication date
EP1777019B1 (fr) 2008-10-01
ATE409532T1 (de) 2008-10-15
DE502005005557D1 (de) 2008-11-13

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