EP0677341A1 - Formkopf für die Herstellung von spiralig gewickelten Rohren - Google Patents

Formkopf für die Herstellung von spiralig gewickelten Rohren Download PDF

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Publication number
EP0677341A1
EP0677341A1 EP94302644A EP94302644A EP0677341A1 EP 0677341 A1 EP0677341 A1 EP 0677341A1 EP 94302644 A EP94302644 A EP 94302644A EP 94302644 A EP94302644 A EP 94302644A EP 0677341 A1 EP0677341 A1 EP 0677341A1
Authority
EP
European Patent Office
Prior art keywords
forming head
rollers
strip
metal strip
guide
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Withdrawn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
EP94302644A
Other languages
English (en)
French (fr)
Inventor
Michel Vandenbroucke
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
Priority to EP94302644A priority Critical patent/EP0677341A1/de
Priority to AU23782/95A priority patent/AU2378295A/en
Priority to PCT/SE1995/000412 priority patent/WO1995028240A1/en
Publication of EP0677341A1 publication Critical patent/EP0677341A1/de
Withdrawn legal-status Critical Current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
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/126—Supply, or operations combined with supply, of strip material
    • 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

Definitions

  • This invention concerns a forming head for use in the production of helically wound tubing, and more especially to an improved forming head for incorporation in a machine of the kind used for the production of helically wound lock-seam tubing.
  • the invention also provides a tube forming machine incorporating such a forming head.
  • a known forming head of this kind comprises a generally cylindrical shell adapted to receive and guide a flanged metal strip fed thereto, in such a manner that the strip is constrained to follow a helical path whereby mating margins of the strip are brought into engagement with one another for seaming together by clinching rollers associated with the forming head and engaging the mating margins of the strip.
  • Such a forming head in use, forms part of a complete machine for the manufacture of helically wound lock-seam tubing, such a machine being illustrated diagrammatically in Fig.1, wherein the reference numeral 1 illustrates a strip of flat sheet metal fed from a coil, not shown, the reference numeral 2 illustrates pairs of cooperating forming rollers that serve to form flanges on the opposite margins of the strip 1, and the reference numerals 3 indicate drive rollers that serve to draw the strip 1 through the forming rollers 2 and to advance the flanged strip through the forming head, which is illustrated diagrammatically at 4.
  • the longitudinal axis of the strip 1 is at an oblique angle to the central axis of the forming head 4, and thus as the strip 1 is advanced by the rollers 3 it is guided by the forming head 4 into a helically wound form, finished tubing issuing from the forming head 4 in the direction of the arrow A, as shown in broken lines.
  • the forming head 4 is associated with internal and external clinching rollers that engage mating flanges of the strip 1 to form the lock-seam and the strip 1 is guided from the rollers 3 to the forming head 4 by means of upper and lower guide plates 5 that support the strip against buckling.
  • Machines of the general type illustrated in Fig.1 have been used for many years in the production of helically wound lock-seam tubing for use, for example, in ducting for ventilation and central heating systems.
  • a forming head that can be used as a direct replacement for the forming head 4 of a known machine of the kind already described above with reference to Fig. 1.
  • the forming head comprises a base 10 adapted to be secured to the frame of the machine, to which is secured a cylindrical shell 11 formed from a heavy gauge section of steel tube.
  • Fig. 2 shows an arc of only 360°, the angular positions of the rollers are indicated by numbering the rollers consecutively in a clock-wise direction with the rollers that are visible directly in Fig. 2 being numbered 13-32, and the remaining rollers being numbered 33-40. Where any one of the rollers 33-40 is not directly visible in the drawings, its relative position, or that of its axis, is indicated by reference numerals with broken leading lines.
  • each of the rollers supported within the shell 11 comprises an outer sleeve 50 that is rotatably supported on a shaft 51 by means of needle roller bearings 52 which are lubricated and sealed by shaft seals 53.
  • Ends 51A of the shaft 51 are machined flat and bored to receive machine screws 54 which engage in the outer shell 11 to clamp the shaft 51 in place against spacing tubes 55 that are radiused to match the curvature of the internal surface of the shell 11.
  • Spacing washers 56 can, if desired, be interposed between the spacers 55 and the shaft 51 to enable adjustment of the positions of the shaft 51 in order to vary the effective internal diameter of the roller guide path in accordance with, for example, the thickness of metal strip to be fed to the forming head.
  • the shell 11 has a generally L-shaped cut out with limbs 11A,11B.
  • a metal strip can be fed along an oblique axis indicated at 60 to pass through the portion 11A of the slot.
  • the rollers 13-40 can support the metal strip as it moves through a helical path which is indicated diagrammatically by the sinusoidal lines 61 and 62 in Fig. 3,and the circumference of which is indicated by the broken line 63 in Fig. 2.
  • the broken line 64 indicates a cylindrical plane within which all of the rotary axes of the rollers 13-40 are located.
  • the rollers 13 to 26 are located immediately adjacent one another and have a diameter such that the axes of adjacent rollers subtend an angle of less than 12° to the central axis of the shell 11, whereas the axes of the remaining rollers are more widely spaced such that adjacent axes subtend angles of 30° to the central axis.
  • rollers 13-40 can be seen from Figs. 4 and 5, and by comparison with Figs. 2 and 3 in which the roller mountings are indicated only diagrammatically.
  • the lower-most rollers 13, 14, 15 and 16 on the on hand and 32, 33 and 34 on the other hand are axially shortened to terminate at the edges of the portion 11B of the aforementioned cut out in the shell 11.
  • This portion 11B is intended to receive a lower clinching roller of the associated machine, not shown.
  • the rollers 32, 33 and 34 are also axially shortened so that their right hand ends as viewed in Fig.3 terminate flush with an axial cut out 11C that is provided to enable a tube cutting attachment to gain access the internal and external surfaces of the formed tube as in known machines. Only the lower portion of the cut out 11C is visible in Fig. 3, its upper edge terminates above the plane of the drawing.
  • metal strip is advanced along the axis 60, and is forced to follow the curvature of the closely spaced rollers 13-26 so that an initial bend is formed in the strip about an arc of the circumference 63.
  • the arcuate strip subsequently passes over the more widely spaced rollers 27-32 to return between clinching rollers located between the respective sets of rollers 13-16 and 32-34.
  • the clinching rollers are engaged with one another to compress and seam mating flanged edges of the strip, in well known manner that will not be further described.
  • the margins of the metal strip entering the forming head along the central axis 60 are indicated diagrammatically at 65 and 66, and the flanges on the metal strip lie outside the helical area of support indicated by the lines 61 and 62, so that the mating flanges and the formed lock-seam of the finished tubing pass between the ends of axially adjacent rollers.
  • additional guide means in the forming head to receive the flanges or the lock-seam, as in conventional forming heads such as shown in Fig. 1.
  • the rollers themselves are specially machined or shaped to provide clearance for the flanges and the lock-seam, as in other known arrangements.
  • a forming head in accordance with the invention provides a novel arrangement wherein accurate and rigid guidance is' provided over the helical path of a metal strip whilst enabling friction to be reduced to the extent that lubrication of the forming head is no longer required.
  • Fig. 7 shows a modified arrangement of guide roller wherein the single supporting shaft 51 is replaced by stub shafts 51' engaging in bearings 52' within axial recesses at the end of each roller 50.
  • This arrangement enables standard stub shafts 51' to be used for all rollers, thus reducing manufacturing costs.
  • the remaining components are as already described with reference to Fig. 4 and are indicated with the same reference numerals.
EP94302644A 1994-04-14 1994-04-14 Formkopf für die Herstellung von spiralig gewickelten Rohren Withdrawn EP0677341A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP94302644A EP0677341A1 (de) 1994-04-14 1994-04-14 Formkopf für die Herstellung von spiralig gewickelten Rohren
AU23782/95A AU2378295A (en) 1994-04-14 1995-04-13 Forming head for the production of helically-wound tubing
PCT/SE1995/000412 WO1995028240A1 (en) 1994-04-14 1995-04-13 Forming head for the production of helically-wound tubing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94302644A EP0677341A1 (de) 1994-04-14 1994-04-14 Formkopf für die Herstellung von spiralig gewickelten Rohren

Publications (1)

Publication Number Publication Date
EP0677341A1 true EP0677341A1 (de) 1995-10-18

Family

ID=8217649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94302644A Withdrawn EP0677341A1 (de) 1994-04-14 1994-04-14 Formkopf für die Herstellung von spiralig gewickelten Rohren

Country Status (3)

Country Link
EP (1) EP0677341A1 (de)
AU (1) AU2378295A (de)
WO (1) WO1995028240A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010098718A1 (en) * 2009-02-27 2010-09-02 Spiro International S.A. Forming head for forming spirally seamed tube

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE972771C (de) * 1944-06-16 1959-09-24 Phoenix Rheinrohr Ag Vereinigt Verfahren und Vorrichtung zur Herstellung von Rohren mit schraubenfoermiger Naht
AT208682B (de) * 1957-06-07 1960-04-25 Wendel Et Cie Sa Vorrichtung zur Herstellung von Rohren
GB1168179A (en) * 1966-12-21 1969-10-22 Malkki Eino Improvements in methods of and apparatus for making Helically-Seamed Tubes
WO1983004196A1 (en) * 1982-05-27 1983-12-08 Rib Loc Hong Kong Limited Helically-formed pipe winding machine
EP0222285A2 (de) * 1985-11-13 1987-05-20 Fritz Hahn GmbH & Co. KG Verfahren und Vorrichtung zum Herstellen eines Wellrohres durch schraubenlinienförmiges Wickeln eines gewellten, dünnen Bandes vorzugsweise eines Stahlbandes

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE189621C1 (de) * 1964-01-01
FR1187817A (fr) * 1956-08-30 1959-09-16 Machine à fabriquer des tubes
SE330146B (de) * 1967-05-17 1970-11-09 Protol Sa
DE2212744B2 (de) * 1972-03-13 1974-02-21 Berliner Maschinen-Actien-Gesellschaft Vormals L. Schwartzkopff, 1000 Berlin Steuereinrichtung zum Verstellen von Biegewalzen eines Schraubennahtrohrwerkes
DE2945123A1 (de) * 1979-11-08 1981-05-21 Rib Loc Hong Kong Ltd., Hongkong Verfahren und vorrichtung zur herstellung von rohren aus streifenfoermigem material
NO162265C (no) * 1982-05-27 1989-12-06 Rib Loc Int Ltd Maskin for tilforming av skrueviklede roer.
DE3324463A1 (de) * 1983-07-07 1985-01-17 Blohm + Voss Ag, 2000 Hamburg Verfahren zur herstellung von schraubennahtrohren

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE972771C (de) * 1944-06-16 1959-09-24 Phoenix Rheinrohr Ag Vereinigt Verfahren und Vorrichtung zur Herstellung von Rohren mit schraubenfoermiger Naht
AT208682B (de) * 1957-06-07 1960-04-25 Wendel Et Cie Sa Vorrichtung zur Herstellung von Rohren
GB1168179A (en) * 1966-12-21 1969-10-22 Malkki Eino Improvements in methods of and apparatus for making Helically-Seamed Tubes
WO1983004196A1 (en) * 1982-05-27 1983-12-08 Rib Loc Hong Kong Limited Helically-formed pipe winding machine
EP0222285A2 (de) * 1985-11-13 1987-05-20 Fritz Hahn GmbH & Co. KG Verfahren und Vorrichtung zum Herstellen eines Wellrohres durch schraubenlinienförmiges Wickeln eines gewellten, dünnen Bandes vorzugsweise eines Stahlbandes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010098718A1 (en) * 2009-02-27 2010-09-02 Spiro International S.A. Forming head for forming spirally seamed tube

Also Published As

Publication number Publication date
AU2378295A (en) 1995-11-10
WO1995028240A1 (en) 1995-10-26

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