EP0078485A1 - Method of manufacturing a helix - Google Patents

Method of manufacturing a helix Download PDF

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Publication number
EP0078485A1
EP0078485A1 EP82109867A EP82109867A EP0078485A1 EP 0078485 A1 EP0078485 A1 EP 0078485A1 EP 82109867 A EP82109867 A EP 82109867A EP 82109867 A EP82109867 A EP 82109867A EP 0078485 A1 EP0078485 A1 EP 0078485A1
Authority
EP
European Patent Office
Prior art keywords
metal strip
sheet metal
corrugations
corrugated
figur
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
EP82109867A
Other languages
German (de)
French (fr)
Other versions
EP0078485B1 (en
Inventor
Reinhold Kehl
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.)
Vaillant BV
Original Assignee
Vaillant Austria GmbH
Cofrabel Nv
Joh Vaillant GmbH and Co
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
SCHONEWELLE BV
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 Vaillant Austria GmbH, Cofrabel Nv, Joh Vaillant GmbH and Co, Vaillant GmbH, Vaillant SARL, Vaillant Ltd, SCHONEWELLE BV filed Critical Vaillant Austria GmbH
Priority to AT82109867T priority Critical patent/ATE15866T1/en
Publication of EP0078485A1 publication Critical patent/EP0078485A1/en
Application granted granted Critical
Publication of EP0078485B1 publication Critical patent/EP0078485B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • 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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/14—Twisting
    • 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
    • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
    • B21D13/04—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by rolling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M9/00—Baffles or deflectors for air or combustion products; Flame shields
    • F23M9/08—Helical or twisted baffles or deflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0026—Guiding means in combustion gas channels

Definitions

  • the present invention relates to a method according to the preamble of the main claim and to a use of the helix thus produced.
  • Such metal coils are preferably used in exhaust gas flues from fuel-heated heat sources, in particular storage water heaters. They are used to swirl the hot exhaust gases of a burner sweeping along an exhaust pipe and to bring them into intimate contact with the inner wall of the exhaust pipe, which forms the inner wall of a water container on the outside.
  • Such sheet metal coils have so far been produced from a strip of tape by first cutting it to length de and was then buckled. Such a buckling creates unfavorable flow conditions.
  • the present invention has for its object to provide a method for producing a helix, which is easy to use, works almost without waste and provides perfect flow conditions.
  • the starting material for the process is assumed to be a flat sheet metal strip which is unwound from a roll as an endless material.
  • the sheet metal strip can consist of normal unalloyed steel or also of corrosion-resistant steel, in particular chrome or chrome-nickel steel. Production from copper or copper alloy would also be possible.
  • the sheet metal strip has a rectangular shape in cross section. The strip is first cut to length in a pair of scissors, so that the helix produced later results from the starting material and must have a certain length in comparison to the exhaust pipe of the operating space.
  • the sheet metal strip 1 is then passed through a gear-like tool which creates a corrugation 3 in the central region 2 of the sheet metal strip 1, the axis 4 of the corrugation being at an angle of approximately 45 ° to the longitudinal axis 5 of the sheet metal strip.
  • Two rollers can be used as tools, which are corrugated on their outer jacket, these waves underneath mentioned angles run. The two waves mesh with each other and press the sheet metal strip 1 between them in the middle.
  • the waves in the rollers in the edge region 6 can become flatter, so that there is a gradual transition from the central region 2 to the edge region 7 which has remained untreated, compare in particular FIG.
  • the sheet metal strip is gripped at both ends by a tool and one end is twisted by one or more revolutions relative to the other.
  • the sheet metal strip is thus twisted into a spiral.
  • the central area is shortened relative to the edge area, approximately by the amount by which the peripheral area is stretched relative to the central area.
  • a compression of the central area is carried out, which is considerably easier to master in terms of process technology and tools than the stretching which leads to cracks.
  • FIG. Four it is also possible not only to provide the corrugation in the central region of the metal strip, but also to allow the corrugation to take place at an angle of 90 °, that is to say transversely to the steering axis 5, and to corrugate the entire strip, that is to say also the edge region.
  • the corrugated sheet metal strip is twisted, the waves of the edge area stretch during this torsional movement, so that the waviness in the edge area almost disappears while the center area of the corrugation remains, see Figure eight.
  • the wave depth there is a continuous transition from the maximum wave depth or height in the middle region to an almost flat stretching position in the edge region. This process can also be mastered in terms of tools and production.
  • the finished coil can be seen from FIG.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Microwave Tubes (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Catalysts (AREA)
  • Exhaust Silencers (AREA)
  • Wire Processing (AREA)

Abstract

1. A process of manufacturing a helical coil, particularly a helically coiled exhaust gas duct, from a planar metal strip (1), which has corrugations (3) extending transversely to its longitudinal direction and which is twisted, characterized in that only the intermediate region of the sheet metal strip (1) is corrugated, the corrugations (3) are formed by means of a gearlike double roller tool, and the corrugations (3) extend relative to the longitudinal axis of the metal strip at an angle which differs from 90 so that the metal strip (1) follows the twist so as to dissipate the stresses applied by the formation of the corrugations (3).

Description

Die vorliegende Erfindung bezieht sich auf ein Verfahren gemäß dem Oberbegriff des Hauptanspruchs sowie auf eine Verwendung der so hergestellten Wendel.The present invention relates to a method according to the preamble of the main claim and to a use of the helix thus produced.

Solche Blechwendeln werden bevorzugt in Abgaszügen von brennstoffbeheizten Wärmequellen, insbesondere von Speicherwasserheizern, eingesetzt. Sie dienen dazu, die'in einem Abgasrohr entlangstreichenden heißen Abgase eines Brenners zu verwirbeln und in innigen Kontakt mit der Innenwandung des Abgasrohres zu bringen, das an seiner Außenseite die Innenwandung eines Wasserbehälters bildet.Such metal coils are preferably used in exhaust gas flues from fuel-heated heat sources, in particular storage water heaters. They are used to swirl the hot exhaust gases of a burner sweeping along an exhaust pipe and to bring them into intimate contact with the inner wall of the exhaust pipe, which forms the inner wall of a water container on the outside.

Solche Blechwendeln wurden bislang aus einem Bandstreifen hergestellt, indem dieser zunächst auf Länge geschnitten wurde und anschließend geknickt wurde. Bei einer solchen Knikkung entstehen ungünstige Strömungsverhältnisse.Such sheet metal coils have so far been produced from a strip of tape by first cutting it to length de and was then buckled. Such a buckling creates unfavorable flow conditions.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Herstellen einer Wendel anzugeben, das sich einfach handhaben läßt, nahezu ausschußfrei arbeitet und einwandfreie Strömungsbedingungen liefert.The present invention has for its object to provide a method for producing a helix, which is easy to use, works almost without waste and provides perfect flow conditions.

Die Lösung dieser Aufgabe liegt in den kennzeichnenden Merkmalen des Hauptanspruchs.The solution to this problem lies in the characterizing features of the main claim.

Weitere Ausgestaltungen und besonders vorteilhafte Weiterbildungen der Erfindung gehen aus den Unteransprüchen sowie der nachfolgenden Beschreibung hervor, die ein Ausführungsbeispiel der Erfindung anhand der Figuren eins bis acht der Zeichnungen näher erläutert.Further refinements and particularly advantageous developments of the invention emerge from the subclaims and the following description, which explains an exemplary embodiment of the invention with reference to FIGS. 1 to 8 of the drawings.

Es zeigen

  • Figur eins eine Ansichtsdarstellung eines Blechstreifens,
  • Figur zwei einen Schnitt entlang der Linie AB in Figur eins
  • und Figur drei einen weiteren Schnitt des Blechstreifens entlang der Linie DF in Figur eins.
  • Figur vier eine Variante zu Figur eins,
  • Figur fünf einen Schnitt entlang der Linie GH,
  • Figur sechs einen Schnitt entlang der Linie IK,
  • Figur sieben eine Ansicht der Wendel nach Figur vier und
  • Figur acht einen Schnitt entlang der Linie LM.
Show it
  • FIG. 1 shows a view of a sheet metal strip,
  • Figure two shows a section along the line AB in Figure one
  • and FIG. three shows a further section of the sheet metal strip along the line DF in FIG.
  • Figure four shows a variant of figure one,
  • FIG. 5 shows a section along the line GH,
  • FIG. 6 shows a section along the line IK,
  • Figure seven is a view of the coil of Figure four and
  • Figure eight shows a section along the line LM.

In allen acht Figuren bedeuten gleiche Bezugszeichen jeweils die gleichen Einzelheiten.In all eight figures, the same reference symbols denote the same details.

Als Ausgangsmaterial für das Verfahren wird von einem planen Blechstreifen ausgegangen, der als Endlosmaterial von einer Rolle abgewickelt wird. Der Blechstreifen kann aus normalem unlegiertem Stahl oder auch aus korrosionsfestem Stahl, insbesondere Chrom- oder Chrom-Nickel-Stahl bestehen. Auch eine Herstellung aus Kupfer oder Kupferlegierung wäre möglich. Der Blechstreifen weist im Querschnitt Rechteckform auf. Der Streifen wird zunächst in einer Schere auf Länge geschnitten, so daß sich aus dem Ausgangsmaterial die später hergestellte Wendel ergibt, die im Vergleich zu dem Abgasrohr des Einsatzraumes eine bestimmte Länge aufweisen muß. Anschließend wird der Blechstreifen 1 durch ein zahnradartiges Werkzeug gegeben, das im Mittenbereich 2 des Blechstreifens 1 eine Wellung 3 erzeugt, wobei die Achse 4 der Wellung in einem Winkel von etwa 45° zur Längsachse 5 des Blechstreifens liegt. Als Werkzeug können zwei Rollen dienen, die an ihrem Außenmantel gewellt sind, wobei diese Wellen unter dem eben erwähnten Winkel verlaufen. Die beiden Wellen kämmen ineinander und drücken den Blechstreifen 1 zwischen sich im Mittenbereich. Die Wellen können in den Rollen im Randbereich 6 flacher werden, so daß sich ein allmählicher Übergang vom Mittenbereich 2 auf den unbehandelt gebliebenen Randbereich 7 ergibt, vergleiche insbesondere Figur zwei.The starting material for the process is assumed to be a flat sheet metal strip which is unwound from a roll as an endless material. The sheet metal strip can consist of normal unalloyed steel or also of corrosion-resistant steel, in particular chrome or chrome-nickel steel. Production from copper or copper alloy would also be possible. The sheet metal strip has a rectangular shape in cross section. The strip is first cut to length in a pair of scissors, so that the helix produced later results from the starting material and must have a certain length in comparison to the exhaust pipe of the operating space. The sheet metal strip 1 is then passed through a gear-like tool which creates a corrugation 3 in the central region 2 of the sheet metal strip 1, the axis 4 of the corrugation being at an angle of approximately 45 ° to the longitudinal axis 5 of the sheet metal strip. Two rollers can be used as tools, which are corrugated on their outer jacket, these waves underneath mentioned angles run. The two waves mesh with each other and press the sheet metal strip 1 between them in the middle. The waves in the rollers in the edge region 6 can become flatter, so that there is a gradual transition from the central region 2 to the edge region 7 which has remained untreated, compare in particular FIG.

Nach dem Einbringen der Wellen im Mittelbereich wird der Blechstreifen an seinen beiden Enden von einem Werkzeug gefaßt und das eine Ende gegenüber dem anderen um eine oder mehrere Umdrehungen tordiert. Somit wird der Blechstreifen zu einer Wendel tordiert.After the introduction of the shafts in the central area, the sheet metal strip is gripped at both ends by a tool and one end is twisted by one or more revolutions relative to the other. The sheet metal strip is thus twisted into a spiral.

Durch das Einbringen der Wellen 3 in den Mittenbereich des Blechstreifens wird der Mittenbereich gegenüber dem Randbereich verkürzt, und zwar etwa um das Maß, um das der Randbereich gegenüber dem Mittenbereich gestreckt wird. Bei dem erfindungsgemäßen Verfahren wird also statt einer Streckung des Blechrandbereiches eine Stauchung des Mittelbereiches vorgenommen, die verfahrenstechnisch und werkzeugmäßig erheblich leichter zu beherrschen ist als die Streckung, die zu Rissen führt. Beim Tordieren des in der Mitte gewellten Blechstreifens gleichen sich nur noch die auf dem Blechstreifen durch die Wellung aufgebrachten Spannungen aus, so daß der Blechstreifen willig der Torsion folgt.By introducing the shafts 3 into the central area of the sheet metal strip, the central area is shortened relative to the edge area, approximately by the amount by which the peripheral area is stretched relative to the central area. In the method according to the invention, instead of stretching the sheet metal edge area, a compression of the central area is carried out, which is considerably easier to master in terms of process technology and tools than the stretching which leads to cracks. When twisting the sheet metal strip, which is corrugated in the middle, only the tensions applied to the sheet metal strip by the corrugation balance out, so that the sheet metal strip willingly follows the torsion.

Gemäß Figur vier ist es auch möglich, nicht nur den Mittenbereich des Blechstreifens mit der Wellung zu versehen, sondern die Wellung in einem Winkel von 90°, also quer zur Lenksachse 5, erfolgen zu lassen und den gesamten Streifen, also auch den Randbereich zu wellen. Wird hierbei nunmehr der gewellte Blechstreifen tordiert, so strecken sich bei dieser Torsionsbewegung die Wellen des Randbereiches, so daß die Welligkeit im Randbereich nahezu verschwindet, während der Mittenbereich der Wellung verbleibt, vergleiche Figur acht. Bezüglich der Wellentiefe ergibt sich ein fortlaufender Übergang von der maximalen Wellentiefe beziehungsweise Höhe im Mittenbereich zu einer fast ebenen Strecklage im Randbereich. Auch dieser Verfahrensgang läßt sich werkzeug- und herstellungsmäßig gut beherrschen. Aus der Figur sieben ist die fertige Wendel ersichtlich.According to FIG. Four, it is also possible not only to provide the corrugation in the central region of the metal strip, but also to allow the corrugation to take place at an angle of 90 °, that is to say transversely to the steering axis 5, and to corrugate the entire strip, that is to say also the edge region. If the corrugated sheet metal strip is twisted, the waves of the edge area stretch during this torsional movement, so that the waviness in the edge area almost disappears while the center area of the corrugation remains, see Figure eight. With regard to the wave depth, there is a continuous transition from the maximum wave depth or height in the middle region to an almost flat stretching position in the edge region. This process can also be mastered in terms of tools and production. The finished coil can be seen from FIG.

Claims (6)

1. Verfahren zum Herstellen einer Wendel aus einem planen Blechstreifen, dadurch gekennzeichnet, daß der Blechstreifen (1) in seinem Mittenbereich (2) gewellt und anschließend tordiert wird.1. A method for producing a coil from a flat sheet metal strip, characterized in that the sheet metal strip (1) is corrugated in its central region (2) and then twisted. 2. Verfahren nach Anspruch eins, dadurch gekennzeichnet, daß der Blechstreifen (1) in seiner Querrichtung gewellt wird.2. The method according to claim one, characterized in that the sheet metal strip (1) is corrugated in its transverse direction. 3. Verfahren nach Anspruch eins oder zwei, dadurch gekennzeichnet, daß der Blechstreifen über seine gesamte Breite gewellt wird.3. The method according to claim one or two, characterized in that the sheet metal strip is corrugated over its entire width. 4. Verfahren nach einem der Ansprüche eins bis drei, dadurch gekennzeichnet, daß die Richtung der Wellen (3) in einem Winkel von 45° zur Längsachse (5) des Blechstreifens (1) erfolgt.4. The method according to any one of claims one to three, characterized in that the direction of the shafts (3) is at an angle of 45 ° to the longitudinal axis (5) of the sheet metal strip (1). 5. Verfahren nach einem der Ansprüche eins bis vier, dadurch gekennzeichnet, daß die Wellung (3) mit einem zahnradartigen Doppelrollenwerkzeug hergestellt wird.5. The method according to any one of claims one to four, characterized in that the corrugation (3) is produced with a gear-like double roller tool. 6. Die Verwendung einer nach einem der Ansprüche eins bis fünf hergestellten Blechwendel als Abgaswendel im Abgasrohr einer brennstoffbeheizten Wärmequelle.6. The use of a sheet metal coil produced according to one of claims one to five as an exhaust gas coil in the exhaust pipe of a fuel-heated heat source.
EP82109867A 1981-10-31 1982-10-26 Method of manufacturing a helix Expired EP0078485B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82109867T ATE15866T1 (en) 1981-10-31 1982-10-26 METHOD OF MAKING A COIL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3143751 1981-10-31
DE3143751 1981-10-31

Publications (2)

Publication Number Publication Date
EP0078485A1 true EP0078485A1 (en) 1983-05-11
EP0078485B1 EP0078485B1 (en) 1985-10-02

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Family Applications (1)

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EP82109867A Expired EP0078485B1 (en) 1981-10-31 1982-10-26 Method of manufacturing a helix

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EP (1) EP0078485B1 (en)
AT (1) ATE15866T1 (en)
DE (1) DE3266710D1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0248629A2 (en) * 1986-06-04 1987-12-09 Ambi-Rad Limited Space heating appliance
CN103350323A (en) * 2013-06-20 2013-10-16 上海龙人建设集团有限公司 Manufacturing method of twisted metallic decorative strip
CN111036741A (en) * 2019-11-28 2020-04-21 湖南科技大学 Method for preparing multilayer metal composite material by high-temperature torsion
US10632669B2 (en) * 2016-12-07 2020-04-28 Kasei Kogyo, Co., Ltd. Helical layer structure and manufacturing method of helical layer structure

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE337027C (en) * 1916-07-01 1921-05-23 Luther Daniel Lovekin Process for the manufacture of helically wound insert plates for heat exchange devices
DE1259823B (en) * 1962-03-02 1968-02-01 Steinmueller Gmbh L & C Method and device for the production of sheet metal strips with a corrugated central zone
DE7229628U (en) * 1973-01-11 Junkers & Co Gmbh Directly heated hot water storage tank
US4137744A (en) * 1977-07-07 1979-02-06 Smick Ronald H Apparatus for forming turbulators
DE2848679A1 (en) * 1978-11-09 1980-05-22 Bayer Ag METHOD AND DEVICE FOR PRODUCING COILED STRIPS

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7229628U (en) * 1973-01-11 Junkers & Co Gmbh Directly heated hot water storage tank
DE337027C (en) * 1916-07-01 1921-05-23 Luther Daniel Lovekin Process for the manufacture of helically wound insert plates for heat exchange devices
DE1259823B (en) * 1962-03-02 1968-02-01 Steinmueller Gmbh L & C Method and device for the production of sheet metal strips with a corrugated central zone
US4137744A (en) * 1977-07-07 1979-02-06 Smick Ronald H Apparatus for forming turbulators
DE2848679A1 (en) * 1978-11-09 1980-05-22 Bayer Ag METHOD AND DEVICE FOR PRODUCING COILED STRIPS

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0248629A2 (en) * 1986-06-04 1987-12-09 Ambi-Rad Limited Space heating appliance
EP0248629B1 (en) * 1986-06-04 1992-08-12 Ambi-Rad Limited Space heating appliance
CN103350323A (en) * 2013-06-20 2013-10-16 上海龙人建设集团有限公司 Manufacturing method of twisted metallic decorative strip
CN103350323B (en) * 2013-06-20 2015-10-07 上海龙人建设集团有限公司 The manufacture method of torsional deformation metal finishing band
US10632669B2 (en) * 2016-12-07 2020-04-28 Kasei Kogyo, Co., Ltd. Helical layer structure and manufacturing method of helical layer structure
CN111036741A (en) * 2019-11-28 2020-04-21 湖南科技大学 Method for preparing multilayer metal composite material by high-temperature torsion

Also Published As

Publication number Publication date
DE3266710D1 (en) 1985-11-07
ATE15866T1 (en) 1985-10-15
EP0078485B1 (en) 1985-10-02

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