EP0343973B1 - Tubes à joint hélicoidal - Google Patents

Tubes à joint hélicoidal Download PDF

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Publication number
EP0343973B1
EP0343973B1 EP19890305279 EP89305279A EP0343973B1 EP 0343973 B1 EP0343973 B1 EP 0343973B1 EP 19890305279 EP19890305279 EP 19890305279 EP 89305279 A EP89305279 A EP 89305279A EP 0343973 B1 EP0343973 B1 EP 0343973B1
Authority
EP
European Patent Office
Prior art keywords
roller
clinching
tubing
strip
external
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
Application number
EP19890305279
Other languages
German (de)
English (en)
Other versions
EP0343973A1 (fr
Inventor
Tor Anders Jensen
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.)
Spiro Machines SA
Original Assignee
Spiro Machines SA
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 Spiro Machines SA filed Critical Spiro Machines SA
Publication of EP0343973A1 publication Critical patent/EP0343973A1/fr
Application granted granted Critical
Publication of EP0343973B1 publication Critical patent/EP0343973B1/fr
Expired 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, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/121—Making tubes or metal hoses with helically arranged seams with seams being neither welded nor soldered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/124—Making tubes or metal hoses with helically arranged seams the tubes having a special shape, e.g. with corrugated wall, flexible tubes

Definitions

  • This invention concerns improvements in and relating to helically formed tubing.
  • Such helically formed lock-seam tubing has a variety of uses.
  • the tubing is usually of generally cylindrical configuration, although for some purposes it is desired that the tubing be corrugated. Corrugation of lock-seam tubing requires additional manufacturing steps that correspondingly increase the cost of the tubing.
  • an object of the invention is to provide a simple means of forming corrugated, helically wound tubing.
  • this object is achieved by providing the external clinching roller with a further groove into which the other roller extends, whereby the rollers are effective simultaneously to form the locked seam and to displace the seam radially away from the plane of the metal strip in an outward direction, thereby forming an outwardly projecting helical corrugation in the finished tube.
  • the single figure of the accompanying drawing is a sectional elevation of the forming head of a machine for the production of helically wound lock-seam tubing, shown in the process of forming such tubing.
  • the reference numeral 1 illustrates the forming head of a machine for the production of helical lock-seam tubing.
  • the machine is of generally known type including means for feeding a metal strip into the forming head 1, and means for forming on the longitudinal edges of the metal strip flanges that are interlocked with one another in the finished tubing.
  • Such features of the machine will be familiar to one skilled in the art of the production of helically wound lock-seam tubing, and will therefore not be further described in detail.
  • the machine is provided with a pair of clinching rollers 2 and 3, of which the roller 2 is supported for rotation within the tubing at the point of formation of a closed helix of the metal strip, via a bracket 4 secured to the forming head 1.
  • the roller 3 is mounted externally of the tubing via a further bracket 5 secured to the frame of the machine in a manner not shown.
  • the external roller 3 has a circumferential groove 6 which, in cooperation with the circumference of roller 2 serves to effect closure and compression of the lock-seam of the tubing substantially in the manner of known machines.
  • the groove 6 of roller 3 is located within a recess defined by a further groove 7 of the clinching roller 3.
  • the roller 2 is of correspondingly larger diameter, or is displaced radially relatively to the axis of the formed tubing, so that it extends into the groove 7 of the clinching roller 3.
  • the invention provides for the production of helically corrugated lock-seam tubing wherein the lock-seam and the corrugation are formed simultaneously in a simple manner without the requirement of additional post-forming steps as needed in hitherto known processes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Exhaust Silencers (AREA)
  • Gasket Seals (AREA)

Claims (2)

1. Procédé pour former un tube à jonction hélicoïdale sertie, comprenant les stades suivants : former des rebords marginaux sur une bande de tôle métallique allongée, amener cette bande dans le sens de sa longueur à une tête de formage, grâce à laquelle la bande est enroulée en hélice pour amener en coopération étroite les bords opposés de la bande et les rebords associés, et sertir ensemble les rebords conjugués de la bande pour former une jonction agrafée sertie au moyen de galets de sertissage, qui comprennent un galet de sertissage extérieur (3) ayant une gorge (6) dont la section transversale correspond au profil de la jonction agrafée sertie à former sur le côté extérieur de la paroi du tube et un galet de support intérieur (2), ayant une surface d'appui cylindrique en vis-à-vis de cette gorge (6) du galet de sertissage (3), caractérisé en ce que le galet extérieur (3) a une autre gorge (7) dans laquelle pénètre l'autre galet (2), d'où il résulte que les galets (2,3) coopèrent ensemble pour, simultanément, former la jonction agrafée sertie et déplacer cette jonction radialement vers l'extérieur en l'éloignant de la bande métallique, formant ainsi une ondulation hélicoïdale saillant vers l'extérieur dans le tube terminé.
2. Machine pour former un tube à jonction hélicoïdale sertie, comprenant une tête de formage (1) associée à des moyens pour lui amener une bande métallique allongée ayant des rebords marginaux, tête grâce à laquelle la bande est enroulée en hélice pour amener en coopération étroite lesdits rebords, et des galets de sertissage (2,3) pour sertir ensemble ces rebords et former une jonction agrafée sertie, ces galets de sertissage (2,3) comprenant un galet de sertissage extérieur (3) ayant une gorge (6) dont la section transversale correspond au profil de la jonction agrafée sertie à former sur le côté extérieur de la paroi du tube et un galet support intérieur (2), ayant une surface d'appui cylindrique en vis-à-vis de cette gorge (6) du galet de sertissage (3), caractérisée en ce que le galet extérieur (3) a une autre gorge (7) dans laquelle pénètre l'autre galet (2), d'où il résulte que la jonction agrafée sertie est déplacée radialement vers l'extérieur pendant le sertissage pour former une ondulation hélicoïdale extérieure dans le tube.
EP19890305279 1988-05-25 1989-05-24 Tubes à joint hélicoidal Expired EP0343973B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8812370 1988-05-25
GB888812370A GB8812370D0 (en) 1988-05-25 1988-05-25 Improvements in helically formed tubing

Publications (2)

Publication Number Publication Date
EP0343973A1 EP0343973A1 (fr) 1989-11-29
EP0343973B1 true EP0343973B1 (fr) 1992-08-12

Family

ID=10637508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890305279 Expired EP0343973B1 (fr) 1988-05-25 1989-05-24 Tubes à joint hélicoidal

Country Status (7)

Country Link
EP (1) EP0343973B1 (fr)
AU (1) AU3685189A (fr)
CA (1) CA1337963C (fr)
DE (1) DE68902423T2 (fr)
ES (1) ES2034630T3 (fr)
GB (1) GB8812370D0 (fr)
WO (1) WO1989011351A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6003220A (en) * 1995-03-08 1999-12-21 Protol A. G. Method and apparatus for producing helically wound lock-seam tubing
SE507901C2 (sv) * 1995-03-08 1998-07-27 Protol Ag Sätt och anordning för framställning av spiralfalsade rör, samt sådant spiralfalsat rör

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE57341C (de) * E. zimmermann in Berlin N., Uferstr. 6a 1 Tr Vorrichtung zur Herstellung von Röhren aus einem glatten Blechstreifen, durch schraubenförmige Zusammenwickelung desselben
GB1599379A (en) * 1978-05-31 1981-09-30 Spiro Investment Sa Tube-forming machines
US4763830A (en) * 1986-12-22 1988-08-16 Pacific Roller Die Co., Inc. Method for welding ribbed pipe

Also Published As

Publication number Publication date
DE68902423T2 (de) 1993-02-04
ES2034630T3 (es) 1993-04-01
CA1337963C (fr) 1996-01-23
DE68902423D1 (de) 1992-09-17
EP0343973A1 (fr) 1989-11-29
WO1989011351A1 (fr) 1989-11-30
GB8812370D0 (en) 1988-06-29
AU3685189A (en) 1989-12-12

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