EP1266704A1 - Method and apparatus for producing helically wound lock-seam tubing and helically-wound lock-seam tube - Google Patents

Method and apparatus for producing helically wound lock-seam tubing and helically-wound lock-seam tube Download PDF

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Publication number
EP1266704A1
EP1266704A1 EP02014515A EP02014515A EP1266704A1 EP 1266704 A1 EP1266704 A1 EP 1266704A1 EP 02014515 A EP02014515 A EP 02014515A EP 02014515 A EP02014515 A EP 02014515A EP 1266704 A1 EP1266704 A1 EP 1266704A1
Authority
EP
European Patent Office
Prior art keywords
seam
lock
helically
tube
clinching
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Withdrawn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
EP02014515A
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German (de)
English (en)
French (fr)
Inventor
Kenneth Lennartsson
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.)
Protol AG
Original Assignee
Protol 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
Priority claimed from SE9501750A external-priority patent/SE507901C2/sv
Application filed by Protol AG filed Critical Protol AG
Publication of EP1266704A1 publication Critical patent/EP1266704A1/en
Withdrawn legal-status Critical Current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
    • B21C37/121—Making tubes or metal hoses with helically arranged seams with non-welded and non-soldered seams

Definitions

  • the present invention relates to the production of helically wound tubing, and more specifically to a method and an apparatus for producing helically wound lock-seam tubing from a strip of sheet metal.
  • the tubing can, for example, be used in ventilation duct systems.
  • a known machine for producing helically wound lock-seam tubing is disclosed in British patent publication GB 2,213,748, which is incorporated herein by reference.
  • a metal strip is fed to a forming head by means of drive rollers, and a helically wound lock-seam tube is formed by clinching rollers associated with the forming head.
  • the operator running the machine must consider several other parameters, such as the thickness of the metal strip, the lubrication of the same, and possible wear of different machine components, for example the rollers. Thus, great demands are made on the skill and experience of the operator.
  • the fitting is not provided with a pre-mounted seal, but the joint between the outside of the fitting and the inside of the tube is filled with a mastic for sealing purposes. If the gap is too large due to an undesirably increased tube diameter, sufficient sealing may not be obtained by means of the mastic. Even if the mastic is safely fastened, problems may arise later due to increased tube diameter caused by vibrations, air pressure peaks, etc.
  • One object of the present invention is to remedy the above-mentioned drawbacks by providing a method and an apparatus for producing helically wound lock-seam tubing with no or very low risk of lock-seam slip or sliding in any direction.
  • Another object of the present invention is to provide a method and an apparatus for producing helically wound lock-seam tubes which maintain their diameter during storing, handling, transportation, delivery and mounting on the final site.
  • a specific object of the invention is to provide a method and an apparatus which are easily adapted to existing machines.
  • the invention makes it possible to avoid lock-seam slip and achieve further advantages.
  • An important advantage according to said first aspect is that the spaced deformations on the lock-seam immediately indicate that the tube in question has a securely interlocked lock-seam which in turn results in a constant diameter of the tube.
  • Another advantage is that the means for providing such interlocking deformations can either be incorporated in new machines or easily mounted on existing machines as additional equipment.
  • a clinching roller of the clinching assembly has a peripheral groove which is provided with at least one recess for forming the expanded portions of the lock seam.
  • At least one interlocking deformation is provided on each helical turn of the lock seam in order to reduce the risk of slipping in the same.
  • Fig. 1 illustrates schematically a machine for producing helically wound lock-seam tubing.
  • Fig. 2 illustrates schematically a clinching assembly incorporated in a machine according to the present invention.
  • Fig. 3 shows a helically wound lock-seam tube produced by a method and an apparatus according to the present invention.
  • Fig. 4 shows, on a larger scale, a lock-seam of the tube shown in Fig. 3.
  • Fig. 5 shows, on a larger scale, a cross-section of the lock-seam shown in Fig. 3.
  • Fig. 6 is a partial view of an embodiment of a clinching roller.
  • Fig. 7 shows a recess of the clinching roller of Fig. 6.
  • Fig. 8 shows a portion of the clinching roller of Fig. 6 from the side.
  • Fig. 9 is a sectional view of the clinching roller of Fig. 6 illustrating a lock-seam indicated by dash-dot lines.
  • Fig. 10 is a partial view of a second embodiment of a clinching roller.
  • Fig. 11 shows a ridge of the clinching roller of Fig. 10.
  • Fig. 12 shows a portion of the clinching roller of Fig. 10 from the side.
  • Fig. 13 is a sectional view of the clinching roller of Fig. 10 illustrating a lock-seam indicated by dash-dot lines.
  • Fig. 14 shows a tube produced by use of a clinching roller of Fig. 10.
  • Fig. 15 shows, on a larger scale, the lock-seam of the tube shown in Fig. 14.
  • Fig. 16 shows, on a larger scale, a cross-section of the lock-seam shown in Fig. 14.
  • Fig. 17 shows a cross-section of a lock-seam in yet another embodiment of the invention.
  • Figs 18-22 are cross-sectional views of alternative lock-seams in accordance with the invention.
  • the method and the apparatus according to the invention can in principle be applied to a machine of the type as generally shown in Fig. 1.
  • This machine bascially corresponds to the machine described in the publication GB-A-2,213,748 mentioned by way of introduction, some components 47, 48 related to one embodiment of the invention, to be described later, being added in Fig. 1.
  • a metal strip 12 is fed to a forming head 14 by drive rollers 11 (arrow A).
  • the longitudinal edge portions 16 of the strip 12 can be preformed in a known manner by rollers 13.
  • the strip 12 is formed into a helical shape, whereby the edge portions 16 are brought into engagement with each other.
  • a clinching assembly 22, 23, 24 is associated with the forming head 14 and includes clinching rollers 17, 18, 19 for clinching the engaging edge portions 16 of the strip 12 to form a helically wound lock-seam 25 on a tube generally denoted 15.
  • the tube 15 is positively fed out of the forming head 14 in a direction shown with an arrow B by the infeeding force of the strip 12.
  • the tube 15 is cut to desired lengths by a cutting device (not shown).
  • the machine shown in Fig. 1 can be improved by means of a clinching device of the type illustrated in Fig. 2.
  • This clinching device can be mounted either in or in connection with the forming head 14.
  • the clinching device according to a first embodiment comprises a clinching roller 30 having a shaft 31 which is rotatably supported by bearings 32 (schematically shown) mounted on the forming head 14 (cf. Fig. 1).
  • a counter-roller 34 having a shaft 35 which is rotatably supported by bearings 36 (schematically shown) mounted on the forming head 14 (cf. Fig. 1) is located inside a tube 33.
  • a lock-seam 37 of the tube 33 is clinched between the peripheries of the two rollers 30, 34 at a clinching point.
  • the clinching pressure is adjustable by a device 38 (schematically shown) acting on the shaft 31 in the directions of the arrows.
  • the clinching roller 30 has a peripheral groove 39 with at least one transverse recess 40 (see Figs 6-9). At the clinching point between the two rollers 30, 34, this recess 40 forms interlocking deformations 41 on the lock-seam 37. The interlocking deformations 41 are spaced on the helical lock-seam 37.
  • the device shown in Fig. 2 works as follows.
  • the engaging edge portions 16 are deformed and interlocked by the deformations 41 formed by the recess 40 of the clinching roller 30.
  • the spaced deformations 41 are in the shape of expanded portions of the lock-seam 37. In this way, the engaging edge portions 16 are fixed together in the lock-seam 37, which in turn results in a tube 33 with a constant diameter. Slip in the lock-seam 37 is prevented.
  • An important advantage relating to the feature that the interlooking deformations on the lock seam 37 are provided in the shape of expanded portions thereof is that the wear of the clinching means for forming the deformations can be kept at a very low level in relation to known equipment for the production of helically wound lock seam tubing.
  • a swollen or expanded deformation 41 is shown in more detail in Fig. 4, and the lock-seam 37 is shown in Fig. 5.
  • the recess 40 of the clinching roller 30 of the first embodiment is shown in detail in Figs 6-9.
  • the recess 40 is broader than the groove 39 with respect to the thickness of the clinching roller 30.
  • the section of Fig. 9 shows the deformation 41 of the lock-seam in the recess 40.
  • FIG. 10-12 A second embodiment of the clinching roller 30 is shown in Figs 10-12. In this embodiment, there is not a recess, but a transverse ridge 42 in the groove 39. At the clinching point between the rollers 30, 34 (cf. Fig. 2), the ridge 42 is pressed into the lock-seam 37, thereby causing an indentation in the same.
  • the ridge 42 can have the same width as the groove 39.
  • the section shown in Fig. 13 illustrates how the interlocking deformation 43 of the lock-seam is formed in the groove 39 of the clinching roller 30.
  • the ridge 42 forms an indentation in the lock-seam.
  • Fig. 14 shows a tube 33 with a lock-seam 37 with spaced indentations or deformations 43 formed by a clinching roller according to the second embodiment.
  • Fig. 15 shows such a deformation 43 in detail.
  • the indentation 43 must be so deep that sufficient interlocking between the edge portions in the lock-seam 37 is achieved.
  • each interlocking deformation 42, 43 is provided on each helical turn of the lock-seam 37.
  • several deformations 42, 43 may be formed on each helical turn.
  • the surfaces of the edge portions 16 of the strip 12 can be provided with knurls 45 which are brought into frictional engagement with each other in a clinching operation forming the lock-seam 37.
  • knurls 45 are formed on the edge portions 16 by a device 46 schematically shown in Fig. 17.
  • the knurling is preferably performed as a preforming operation, such as by using the rollers 13 in Fig. 1. Such knurling rollers (not shown) may be driven.
  • a flexible string 47 for example of rubber, is compressed in the lock-seam 37.
  • the string 47 will act as a friction-enhancing element between the hook-shaped edge portions 16 of the strip 12 and thereby provide the interlocking effect.
  • the compressed flexible string 47 can be inserted in different places between the bent edge portions 16.
  • the string 47 is wound throughout the lock-seam 37, an extremely good sealing effect can be achieved.
  • the string 47 is inserted in the lock-seam 37 in connection with the forming head 14.
  • the string 47 to be inserted is fed from a spool 48 mounted on the machine.
  • the spool 48 is schematically shown in the machine of Fig. 1.
  • the string 47 has a round cross-section before insertion and compression in the lock-seam.
  • the insertion of the string 47 can be combined with the interlocking deformations 41, 43 obtained by the clinching rollers 30 described.
  • the clinching roller is arranged outside the tube, whereas the counter-roller is arranged inside the tube. It will be appreciated, however, that the aimed-at indentations or deformations can also be achieved if the clinching roller is arranged inside the tube and the counter-roller is arranged outside the tube.
  • the means for example a recess or a ridge
  • for providing the interlocking deformations on the lock-seam can be provided on the periphery either of the clinching roller or of the counter-roller. Further, there can be more than one such recess or ridge on the clinching roller or the counter-roller. The important thing is that the aimed-at interlocking effect on the lock-seam is achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Metal Extraction Processes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Gasket Seals (AREA)
  • Forging (AREA)
  • Moulding By Coating Moulds (AREA)
  • Wire Processing (AREA)
EP02014515A 1995-03-08 1996-03-06 Method and apparatus for producing helically wound lock-seam tubing and helically-wound lock-seam tube Withdrawn EP1266704A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US40075295A 1995-03-08 1995-03-08
US400752 1995-03-08
SE9501750A SE507901C2 (sv) 1995-03-08 1995-05-12 Sätt och anordning för framställning av spiralfalsade rör, samt sådant spiralfalsat rör
SE9501750 1995-05-12
EP96906144A EP1015145B1 (en) 1995-03-08 1996-03-06 Method and apparatus for producing helically wound lock-seam tubing

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP96906144A Division EP1015145B1 (en) 1995-03-08 1996-03-06 Method and apparatus for producing helically wound lock-seam tubing

Publications (1)

Publication Number Publication Date
EP1266704A1 true EP1266704A1 (en) 2002-12-18

Family

ID=26662299

Family Applications (2)

Application Number Title Priority Date Filing Date
EP02014515A Withdrawn EP1266704A1 (en) 1995-03-08 1996-03-06 Method and apparatus for producing helically wound lock-seam tubing and helically-wound lock-seam tube
EP96906144A Expired - Lifetime EP1015145B1 (en) 1995-03-08 1996-03-06 Method and apparatus for producing helically wound lock-seam tubing

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP96906144A Expired - Lifetime EP1015145B1 (en) 1995-03-08 1996-03-06 Method and apparatus for producing helically wound lock-seam tubing

Country Status (14)

Country Link
EP (2) EP1266704A1 (ja)
JP (1) JPH11501256A (ja)
CN (1) CN1077463C (ja)
AT (1) ATE229850T1 (ja)
AU (1) AU4961296A (ja)
CA (1) CA2214493C (ja)
CZ (1) CZ293154B6 (ja)
DE (1) DE69625525T2 (ja)
DK (1) DK1015145T3 (ja)
ES (1) ES2187636T3 (ja)
HU (1) HU223347B1 (ja)
NO (1) NO312017B1 (ja)
PL (1) PL179477B1 (ja)
WO (1) WO1996027455A1 (ja)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL1945386T3 (pl) * 2005-09-20 2017-07-31 Helix International, Inc Maszyna i sposób wytwarzania rur z siatki metalowej rozciąganej ze szwem spiralnym zakładkowym z pełnej blachy zwojowej
WO2012009784A1 (en) * 2010-07-21 2012-01-26 Paul Mcmillen Flexible tube, manufacturing method and apparatus
CN102909279A (zh) * 2011-12-30 2013-02-06 中山市奥美森自动化设备有限公司 一种胀杆传送装置
CN102966811B (zh) * 2012-11-01 2015-09-30 江苏澄工机械制造有限公司 一种镀锌螺旋瓦斯抽放管及其加工方法
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
CN104190768A (zh) * 2014-09-11 2014-12-10 东莞诚兴五金制品有限公司 一种铜管的卷圆工艺及其使用的模具
IT201700086880A1 (it) * 2017-07-31 2019-01-31 Zeffiro Apparato di formatura in continuo in condotti a spirale aggraffati,processo di formatura e condotto a spirale
CN110253912B (zh) * 2019-06-27 2021-08-17 盐城工学院 一种螺旋风筒成型机
CN112439818A (zh) * 2019-08-29 2021-03-05 深圳市恒捷光通讯技术有限公司 一种快速装螺旋套管的装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE34871C (de) * E. LEVA VASSEUR und H. WITZENMANN in Paris Biegsames Metallrohr mit eingelegtem Kautschukstreifen
US1479201A (en) * 1921-11-07 1924-01-01 Naylor Robertson Company Spiral pipe
FR996496A (fr) * 1949-10-03 1951-12-19 Procédé de fabrication de tubes et tubes obtenus par ce procédé
DE1082567B (de) * 1955-07-05 1960-06-02 Grundstuecksverwaltungsgesells Verfahren zum Herstellen gefalzter Schraubennahtrohre und Vorrichtung zur Durchfuehrung des Verfahrens
DE1452446B1 (de) * 1960-02-15 1970-03-12 Emil Siegwart Wendelfalzrohr
GB2213748A (en) * 1987-12-21 1989-08-23 Spiro Machines Sa Machine for producing spirally-seamed corrugated metal tubing
EP0527413A1 (de) * 1991-08-08 1993-02-17 Witzenmann GmbH Metallschlauch-Fabrik Pforzheim Wickelschlauch aus Metall

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1718983A (en) * 1926-12-06 1929-07-02 Rome Mfg Company Lock-joint metal tubing
US2339219A (en) * 1940-08-03 1944-01-11 Crowiey Edward Chase Method and machine for making tubes
GB681337A (en) * 1948-12-03 1952-10-22 Adolf Thies Improvements in rain-water pipes, with method and device for their manufacture
FI40528B (ja) * 1966-12-21 1968-11-30 Eino Kalervo Malki
US3604464A (en) * 1968-11-04 1971-09-14 Callahan Mining Corp Bendable metal duct
US3940962A (en) * 1974-05-09 1976-03-02 Pacific Roller Die Company, Incorporated Conduit making machine with diameter control and method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE34871C (de) * E. LEVA VASSEUR und H. WITZENMANN in Paris Biegsames Metallrohr mit eingelegtem Kautschukstreifen
US1479201A (en) * 1921-11-07 1924-01-01 Naylor Robertson Company Spiral pipe
FR996496A (fr) * 1949-10-03 1951-12-19 Procédé de fabrication de tubes et tubes obtenus par ce procédé
DE1082567B (de) * 1955-07-05 1960-06-02 Grundstuecksverwaltungsgesells Verfahren zum Herstellen gefalzter Schraubennahtrohre und Vorrichtung zur Durchfuehrung des Verfahrens
DE1452446B1 (de) * 1960-02-15 1970-03-12 Emil Siegwart Wendelfalzrohr
GB2213748A (en) * 1987-12-21 1989-08-23 Spiro Machines Sa Machine for producing spirally-seamed corrugated metal tubing
EP0527413A1 (de) * 1991-08-08 1993-02-17 Witzenmann GmbH Metallschlauch-Fabrik Pforzheim Wickelschlauch aus Metall

Also Published As

Publication number Publication date
PL179477B1 (pl) 2000-09-29
PL322144A1 (en) 1998-01-05
CN1077463C (zh) 2002-01-09
EP1015145B1 (en) 2002-12-18
NO312017B1 (no) 2002-03-04
CA2214493C (en) 2006-05-02
CZ293154B6 (cs) 2004-02-18
CA2214493A1 (en) 1996-09-12
DE69625525T2 (de) 2003-09-04
NO974074D0 (no) 1997-09-04
NO974074L (no) 1997-10-27
HU223347B1 (hu) 2004-06-28
JPH11501256A (ja) 1999-02-02
AU4961296A (en) 1996-09-23
HUP9801707A3 (en) 2000-06-28
DK1015145T3 (da) 2003-04-07
EP1015145A1 (en) 2000-07-05
DE69625525D1 (de) 2003-01-30
CZ282697A3 (cs) 1999-04-14
ES2187636T3 (es) 2003-06-16
WO1996027455A1 (en) 1996-09-12
CN1177935A (zh) 1998-04-01
HUP9801707A2 (hu) 1998-11-30
ATE229850T1 (de) 2003-01-15

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