EP0589099A1 - Procédé de transformation de tubes ronds en tubes de section polygonale ou autre section non-circulaire - Google Patents

Procédé de transformation de tubes ronds en tubes de section polygonale ou autre section non-circulaire Download PDF

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Publication number
EP0589099A1
EP0589099A1 EP92250272A EP92250272A EP0589099A1 EP 0589099 A1 EP0589099 A1 EP 0589099A1 EP 92250272 A EP92250272 A EP 92250272A EP 92250272 A EP92250272 A EP 92250272A EP 0589099 A1 EP0589099 A1 EP 0589099A1
Authority
EP
European Patent Office
Prior art keywords
tubes
tube
forming
polygonal
radial force
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.)
Withdrawn
Application number
EP92250272A
Other languages
German (de)
English (en)
Inventor
Hans-Günter Schiffers
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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 Mannesmann AG filed Critical Mannesmann AG
Priority to EP92250272A priority Critical patent/EP0589099A1/fr
Publication of EP0589099A1 publication Critical patent/EP0589099A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/155—Making tubes with non circular section
    • 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
    • B21D41/02—Enlarging

Definitions

  • the invention relates to a method and a device for carrying out the method for forming round, in particular longitudinally welded tubes into profile tubes with polygonal or other cross sections deviating from the circular shape.
  • Pipes with a polygonal cross-section in larger dimensions were previously created exclusively by folding processes, whereby a flat strip was welded together in complex and specially designed machines to the finished profile tube after appropriate folding.
  • the present invention has for its object to find a method and an apparatus for performing the method for forming round tubes into profile tubes with polygonal or other cross-sections deviating from the circular shape, which allows the production of these profile tubes in a simple and reliable manner without a large investment in equipment is required. Rather, known plants and plant parts should be able to be used.
  • a method is proposed according to the invention, characterized in that the radius of the tube wall changes in these areas by stepwise radial force acting on regions of the tube inner wall spaced from one another in the circumferential direction, and the tube wall at least between the areas by simultaneously enlarging the inner circumference of the tube the radial force is stretched.
  • an inward radial force acts on the tube wall between the areas of radial force during stretching.
  • a force for example by means of a roller, to the flank areas of the finished profile tube.
  • the shaping of the tubes can take place both in the cold and in the warm state, in a special development of the invention it is also conceivable that the tubes are heated differently in some areas before and / or during the shaping. So it is conceivable that through targeted Heating the edges or the flanks of the profile tube to be created supports or hinders the forming of individual areas.
  • the profiled tubes be subjected to a heat treatment after they have been formed and then subjected to the forming process a second time.
  • the heat-treated tubes can be straightened, calibrated, or their material characteristics can be improved. It is also conceivable within the scope of the invention to deform only the end region of the otherwise circular tubes.
  • a device for carrying out the method according to the invention is characterized by a known expander for pipes with a tool designed according to the inner cross section of the profile pipe.
  • the great advantage of the method according to the invention is that it can be carried out on a conventional system for expanding pipes, as is usually followed by pipe welding systems, in order to straighten and calibrate the welded pipes. It is only necessary to replace the tools with those with a corresponding surface, and the existing system can be used to form round tubes, for example square tubes.
  • the tool is provided with expansion segments, the effective working surface of which, over their length running in the axial direction of the tube, form a transition from the round inside diameter of the tube to the finished polygonal inside diameter of the profile tube. Since, as is known, the expansion of the tubes takes place step by step by moving the tube over the expander tool, it must be formed from round to, for example Square be provided for a transition that allows the expander to be inserted into the round tube and eliminates damage to the inner tube in the transition area.
  • 4 denotes the tube into which the expander 5 can be inserted on one side.
  • the spreading segments 3 By spreading the spreading segments 3 on corresponding surfaces of the wedges 2 by actuating a pull rod 1, they are placed against the inside of the pipe 4 to be formed and carry out the method according to the invention.
  • the expansion segments 3 By spreading the expansion segments 3, the wall of the tube 4 is stretched and overstretched, so that the tube wall follows the circumferential profile of the expanded expander 5.
  • the desired cross-sections can be set, it being advisable to carry out an oval pre-deformation of the tube in the case of tubes to be rectangularly shaped, in order to be able to insert the tool into the tube.
  • the deformation of the tube can also be limited to the end regions.
  • FIG. 2 shows schematically how a round tube 4 can be shaped into a square tube
  • FIG. 3 shows the shaping of an oval preformed tube into a tube with a rectangular cross section
  • FIG. 4 shows the deformation of the round tube 4 into a profile tube with a hexagonal cross section.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
EP92250272A 1992-09-24 1992-09-24 Procédé de transformation de tubes ronds en tubes de section polygonale ou autre section non-circulaire Withdrawn EP0589099A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92250272A EP0589099A1 (fr) 1992-09-24 1992-09-24 Procédé de transformation de tubes ronds en tubes de section polygonale ou autre section non-circulaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92250272A EP0589099A1 (fr) 1992-09-24 1992-09-24 Procédé de transformation de tubes ronds en tubes de section polygonale ou autre section non-circulaire

Publications (1)

Publication Number Publication Date
EP0589099A1 true EP0589099A1 (fr) 1994-03-30

Family

ID=8211205

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92250272A Withdrawn EP0589099A1 (fr) 1992-09-24 1992-09-24 Procédé de transformation de tubes ronds en tubes de section polygonale ou autre section non-circulaire

Country Status (1)

Country Link
EP (1) EP0589099A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012066268A (ja) * 2010-09-22 2012-04-05 Yutaka Giken Co Ltd 異形筒体の成形方法及び成形装置
WO2013075628A1 (fr) * 2011-11-24 2013-05-30 贵州安大航空锻造有限责任公司 Méthode de déformation à chaud d'une pièce rectangulaire en alliage haute température forgée par laminage circulaire en une pièce annulaire de forme irrégulière
CN114273458A (zh) * 2021-12-24 2022-04-05 武汉市博钛新材料科技有限公司 一种高频感应无缝异型钛焊管及生产方法
DE102020213223A1 (de) 2020-10-20 2022-04-21 Sms Group Gmbh Einrichtung zur Schmierung eines Formwerkzeugs sowie Verfahren zur Schmierung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH407926A (fr) * 1962-01-26 1966-02-28 Spiro Investment Sa Procédé et appareil pour la fabrication d'un tube
DE1267647B (de) * 1964-10-21 1968-05-09 John Edvin Hjalmarsson Vorrichtung zur fortlaufenden Verformung von runden Rohren in Rohre eckigen Querschnitts
DE2363629A1 (de) * 1973-12-20 1975-06-26 Nokia Oy Ab Formungsvorrichtung zur formung eines runden rohrs zu einer rechteckform
DE2837184A1 (de) * 1978-08-25 1980-03-06 Kabel Metallwerke Ghh Verfahren und vorrichtung zur herstellung von rohren fuer waermetauscher
DE3030978A1 (de) * 1980-08-16 1982-04-01 B.S.L. (Bignier Schmid-Laurent), Ivry-sur-Seine Verfahren und vorrichtung zur herstellung von rohren mit polygonalem querschnitt

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH407926A (fr) * 1962-01-26 1966-02-28 Spiro Investment Sa Procédé et appareil pour la fabrication d'un tube
DE1267647B (de) * 1964-10-21 1968-05-09 John Edvin Hjalmarsson Vorrichtung zur fortlaufenden Verformung von runden Rohren in Rohre eckigen Querschnitts
DE2363629A1 (de) * 1973-12-20 1975-06-26 Nokia Oy Ab Formungsvorrichtung zur formung eines runden rohrs zu einer rechteckform
DE2837184A1 (de) * 1978-08-25 1980-03-06 Kabel Metallwerke Ghh Verfahren und vorrichtung zur herstellung von rohren fuer waermetauscher
DE3030978A1 (de) * 1980-08-16 1982-04-01 B.S.L. (Bignier Schmid-Laurent), Ivry-sur-Seine Verfahren und vorrichtung zur herstellung von rohren mit polygonalem querschnitt

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012066268A (ja) * 2010-09-22 2012-04-05 Yutaka Giken Co Ltd 異形筒体の成形方法及び成形装置
WO2013075628A1 (fr) * 2011-11-24 2013-05-30 贵州安大航空锻造有限责任公司 Méthode de déformation à chaud d'une pièce rectangulaire en alliage haute température forgée par laminage circulaire en une pièce annulaire de forme irrégulière
DE102020213223A1 (de) 2020-10-20 2022-04-21 Sms Group Gmbh Einrichtung zur Schmierung eines Formwerkzeugs sowie Verfahren zur Schmierung
WO2022084113A1 (fr) 2020-10-20 2022-04-28 Sms Group Gmbh Dispositif pour lubrifier un outil de formage et procédé de lubrification
CN114273458A (zh) * 2021-12-24 2022-04-05 武汉市博钛新材料科技有限公司 一种高频感应无缝异型钛焊管及生产方法

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