US3868840A - Tube made of metal strip by means of spiral seaming and a device intended for a spiral seaming tube machine for the production of such a tube - Google Patents

Tube made of metal strip by means of spiral seaming and a device intended for a spiral seaming tube machine for the production of such a tube Download PDF

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Publication number
US3868840A
US3868840A US443036A US44303674A US3868840A US 3868840 A US3868840 A US 3868840A US 443036 A US443036 A US 443036A US 44303674 A US44303674 A US 44303674A US 3868840 A US3868840 A US 3868840A
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US
United States
Prior art keywords
metal strip
ridge
tube
rollers
machine
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 - Lifetime
Application number
US443036A
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English (en)
Inventor
Arne Olavi Ekroos
Matti Kaarlo Merikoski
Bernhard Erik Oswald Levander
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.)
Nokia Oyj
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Nokia Oyj
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 Nokia Oyj filed Critical Nokia Oyj
Application granted granted Critical
Publication of US3868840A publication Critical patent/US3868840A/en
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
    • 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
    • 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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/04—Forming single grooves in sheet metal or tubular or hollow articles by rolling

Definitions

  • ABSTRACT A machine for forming a spirally seamed tube from a continuous metal strip formed with at least one integral stiffening ridge between the spiral seams formed at the longitudinal edges of said metal strips.
  • the machine comprises prebending rollers for forming a longitudinal ridge in said metal strip and a guiding unit for bending the strip to form a spiral tube having an axis extending transversely with respect to the longitudinal direction of the metal strip.
  • the machine further comprises seaming rollers for joining together adjacent edges of the spiral tube.
  • a pair of ridge flattening rollers are provided between said prebending rollers and said guiding unit for flattening of the foot of the ridge to form in cross-section a loop forming a space between the walls of said ridge inside said loop.
  • the present invention relates to a machine for forming a spirally seamed tube from a continuous metal strip formed with at least one integral stiffening ridge between the spiral seams formed at the longitudinal edges of said metal strip.
  • the purpose of the present invention is to obtain a machine by which it is possible to provide also a spirally seamed tube with a stiffening ridge in which tube the inner surface thereof is essentially smooth. Owing to the fact that the ridge is flattened only at the foot of said ridge and the fact that the flattening is carried out by means of a pair of rollers instead of by means of a die the friction forces caused by the flattening operation are considerably decreased. Therefore, the rollers used for prebending the metal strip and for rolling the spirally extending seam of the tube formed provide alone a sufficient driving force for advancing the metal strip through the flattening rollers.
  • FIG. 1 is an axial sectional view of a tube manufactured by means of a machine according to the present invention
  • FIG. 2 is a front view of an embodiment of the machine according to the present invention.
  • FIG. 3 is a top view of the machine according to FIG.
  • FIG. 4 is a sectional view along line 44 in FIG. 2, and
  • FIG. 5 is a sectional view along line 5-5 in FIG. 2.
  • the tube illustrated in FIG. 1 is made of a spirally wound metal strip 1.
  • the adjacent spiral edges of the metal strip are fastened to each other by means of folded seams 2.
  • the metal strip is provided with a longitudinally extending ridge 3 extending in parallel with the folded seams 2 between each pair of seams in the tube formed.
  • the ridge 3 extends along the outer mantle surface of the tube and it is flattened at the foot 3a of the ridge to form in cross-section a loop, a space 3b being formed between the walls of the ridge inside said loop.
  • the ridge 3 also gives the tube a high radial rigidity.
  • the machine illustrated in FIGS. 2 and 3 comprises a machine frame 4, three pairs of pre-bending rollers 5, 6 and 7, 8 and 9, 10 respectively which are rotatably mounted in the frame to be positioned with their pressure gaps in the same horizontal plane.
  • the prebending rollers are provided with ribs ll, 12 and 13 respectively and corresponding grooves 14 (FIG. 4) for forming a pre-bent ridge of an open cross-section in the metal strip 1 when the strip is passed between the driven pairs of rollers.
  • the pre-bending rollers also prebend the opposite longitudinal edges of said metal strip.
  • the machine further comprises a flattening unit 15 comprising two vertical flattening rollers 16 and 17 and a horisontal pressure roller 18.
  • the flattening unit is described more in detail in connection with FIG. 5.
  • the machine finally comprises a guiding unit 19 including a spirally extending guide rail 20 forcing the metal strip fed by the rollers to a spiral form and provided with means for mating the opposite pre-bent edges of adjacent-spiral loops into each other.
  • a pair of seaming rollers 21 and 22 are rotatably mounted in the frame 4 for carrying out the final seaming of the mating opposite edges of the metal strip to form the above mentioned seams 2 of the ridge tube.
  • the guiding unit and the seaming rollers may be of the type described in US. Pat. No. 3,155,063.
  • FIG. 5 illustrates the flattening unit 15.
  • the flattening rollers 16 and 17 are rotatably mounted on shafts 23 and 24 fastened in a support 25 fastened in the machine frame.
  • the shaft 23 is excentric whereby the distance between the rollers is adjustable.
  • the rollers form an enlarged circumferential edge 16a and 17a respectively and the gap between said edges is positioned essentially on the same level as the gaps of the pre-bending rollers 5-10 and aligned with said ribs and grooves of the prebending rollers so that the ridge 3 is flattened at the foot by said edges when the metal strip is passed above said rollers 16 and 17.
  • the pressure roller 18 which is rotatably supported by a shaft 26 presses the metal strip against the rollers 16 and 17 whereby the inner mantle surface of the ridge becomes smooth.
  • Air pressure loss measurements have been carried out with spiral tubes manufactured with a machine according to the present invention.
  • the air pressure loss has proved to be essentially the same as the air pressure loss in a ridgeless spiral seam tube.
  • the ridge flattened at the foot provides for a smooth inner mantle surface of the spiral tube as well as for an increased rigidity of the tube.
  • the metal strip may be provided with more than one ridge between the longitudinal edges of the strip. In such a case the machine is provided with a separate flattening unit for each ridge.
  • the tube may be made with a welded seam.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
US443036A 1971-02-09 1974-02-15 Tube made of metal strip by means of spiral seaming and a device intended for a spiral seaming tube machine for the production of such a tube Expired - Lifetime US3868840A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI344/71A FI57221C (fi) 1971-02-09 1971-02-09 Foerstyvat med falssoem foersett av ett metallband tillverkat spiralsoemmat roer och maskin foer tillverkning av dylikt roer

Publications (1)

Publication Number Publication Date
US3868840A true US3868840A (en) 1975-03-04

Family

ID=8503970

Family Applications (1)

Application Number Title Priority Date Filing Date
US443036A Expired - Lifetime US3868840A (en) 1971-02-09 1974-02-15 Tube made of metal strip by means of spiral seaming and a device intended for a spiral seaming tube machine for the production of such a tube

Country Status (6)

Country Link
US (1) US3868840A (enrdf_load_stackoverflow)
DE (1) DE2205247C2 (enrdf_load_stackoverflow)
FI (1) FI57221C (enrdf_load_stackoverflow)
FR (1) FR2124587B1 (enrdf_load_stackoverflow)
NO (1) NO135166C (enrdf_load_stackoverflow)
SE (1) SE388368B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060016063A1 (en) * 2004-07-26 2006-01-26 Gharib Mohamed T Lockseaming process and apparatus for the same
US7669448B1 (en) 2005-07-20 2010-03-02 Mohamed Gharib Lockseaming process and apparatus for same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013013735B4 (de) * 2013-08-21 2018-12-27 Fritz Hahn Gmbh & Co. Kg Vorrichtung und Verfahren zur Herstellung eines Wickelfalzrohres sowie ein mit der Vorrichtung und nach dem Verfahren aus einem profilierten Metallband hergestelltes Wickelfalzrohr

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1761980A (en) * 1927-07-05 1930-06-03 Bundy Tubing Co Method of making finned tubing
US2841183A (en) * 1955-06-09 1958-07-01 Wiremold Co Collapsible tubing with protective rib

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE649079C (de) * 1932-01-27 1937-08-14 Friedrich Beckert Aus schraubenfoermig gewickeltem Metallband bestehendes biegsames Rohr zur Verlegung elektrischer Leitungen
CH279689A (de) * 1949-11-30 1951-12-15 Oerlikon Buehrle Ag Verfahren und Vorrichtung zur Herstellung biegsamer Rohre und nach dem Verfahren hergestelltes Rohr.
DE2020547A1 (de) * 1969-05-12 1970-11-26 Vulcan Australia Wendelrohr

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1761980A (en) * 1927-07-05 1930-06-03 Bundy Tubing Co Method of making finned tubing
US2841183A (en) * 1955-06-09 1958-07-01 Wiremold Co Collapsible tubing with protective rib

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060016063A1 (en) * 2004-07-26 2006-01-26 Gharib Mohamed T Lockseaming process and apparatus for the same
US7669448B1 (en) 2005-07-20 2010-03-02 Mohamed Gharib Lockseaming process and apparatus for same

Also Published As

Publication number Publication date
DE2205247C2 (de) 1985-05-15
SE388368B (sv) 1976-10-04
DE2205247A1 (enrdf_load_stackoverflow) 1972-09-07
FR2124587B1 (enrdf_load_stackoverflow) 1975-03-21
FR2124587A1 (enrdf_load_stackoverflow) 1972-09-22
FI57221B (fi) 1980-03-31
NO135166B (enrdf_load_stackoverflow) 1976-11-15
FI57221C (fi) 1980-07-10
NO135166C (no) 1977-08-30

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