EP0343973A1 - Schraubennahtrohre - Google Patents

Schraubennahtrohre Download PDF

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Publication number
EP0343973A1
EP0343973A1 EP89305279A EP89305279A EP0343973A1 EP 0343973 A1 EP0343973 A1 EP 0343973A1 EP 89305279 A EP89305279 A EP 89305279A EP 89305279 A EP89305279 A EP 89305279A EP 0343973 A1 EP0343973 A1 EP 0343973A1
Authority
EP
European Patent Office
Prior art keywords
clinching
seam
strip
tubing
roller
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
EP89305279A
Other languages
English (en)
French (fr)
Other versions
EP0343973B1 (de
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/de
Application granted granted Critical
Publication of EP0343973B1 publication Critical patent/EP0343973B1/de
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 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
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/121—Making tubes or metal hoses with helically arranged seams with non-welded and non-soldered seams
    • 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
    • B21C37/12—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 that a pair of rollers arranged to engage internal and external surfaces of the tubing during forming thereof, in order to effect finishing of the seam in the tubing,are further so shaped and arranged that they serve the additional function of forming a helical corrugation in the wall of the tubing, in the region of the finished seam.
  • the invention accordingly provides a novel tube forming process, a machine for carrying out such process, and an improved corrugated tube helically formed by such a process.
  • 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)
EP19890305279 1988-05-25 1989-05-24 Schraubennahtrohre Expired EP0343973B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=10637508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890305279 Expired EP0343973B1 (de) 1988-05-25 1989-05-24 Schraubennahtrohre

Country Status (7)

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

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

Citations (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
EP0273312A2 (de) * 1986-12-22 1988-07-06 Pacific Roller Die Co., Inc. Verfahren zum Schweissen von gerippten Rohren

Patent Citations (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
EP0273312A2 (de) * 1986-12-22 1988-07-06 Pacific Roller Die Co., Inc. Verfahren zum Schweissen von gerippten Rohren

Also Published As

Publication number Publication date
GB8812370D0 (en) 1988-06-29
WO1989011351A1 (en) 1989-11-30
AU3685189A (en) 1989-12-12
EP0343973B1 (de) 1992-08-12
DE68902423D1 (de) 1992-09-17
DE68902423T2 (de) 1993-02-04
CA1337963C (en) 1996-01-23
ES2034630T3 (es) 1993-04-01

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