EP0851200B1 - Procédé pour la réalisation de languettes et/ou de saillies sur une tôle mince, tôle mince avec languettes et/ou saillies et tube en tôle mince à section rectangulaire - Google Patents

Procédé pour la réalisation de languettes et/ou de saillies sur une tôle mince, tôle mince avec languettes et/ou saillies et tube en tôle mince à section rectangulaire Download PDF

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Publication number
EP0851200B1
EP0851200B1 EP97120668A EP97120668A EP0851200B1 EP 0851200 B1 EP0851200 B1 EP 0851200B1 EP 97120668 A EP97120668 A EP 97120668A EP 97120668 A EP97120668 A EP 97120668A EP 0851200 B1 EP0851200 B1 EP 0851200B1
Authority
EP
European Patent Office
Prior art keywords
sheet metal
tabs
projections
shaped
sheet
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
EP97120668A
Other languages
German (de)
English (en)
Other versions
EP0851200A2 (fr
EP0851200B2 (fr
EP0851200A3 (fr
Inventor
Claus Beck
Jürgen Dipl.-Ing. Hägele (FH)
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.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7816220&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0851200(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP0851200A2 publication Critical patent/EP0851200A2/fr
Publication of EP0851200A3 publication Critical patent/EP0851200A3/fr
Publication of EP0851200B1 publication Critical patent/EP0851200B1/fr
Application granted granted Critical
Publication of EP0851200B2 publication Critical patent/EP0851200B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/04—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular
    • 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
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S138/00—Pipes and tubular conduits
    • Y10S138/04—Air conditioning
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S138/00—Pipes and tubular conduits
    • Y10S138/11—Shape

Definitions

  • the invention relates to a method for attaching tabs and / or projections on a thin sheet, in particular on a strip of sheet metal, which is substantially perpendicular to protrude from the base of the thin sheet and have a height, which is higher than the sheet thickness (see, for example, WO 95/05571) and one hereinafter produced sheet and a made of two sheets Rectangular tube for a heat exchanger.
  • the invention has for its object to provide a method of to create the type mentioned, the economically too is to realize.
  • the inventive method has the advantage that the tabs and / or protrusions not only simple and schettian a thin sheet or thin sheet strips are attached can, but that the tabs and / or projections massive Parts are those without a column or the like. connect to the sheet. As a result, they do not form susceptible to corrosion Put.
  • the thin sheet in the region of the tabs and / or projections by means Stamp and die loaded flat over its yield point is, wherein a part of the sheet material in one or several recesses of the die and / or stamp pressed is to attach the tabs as negative molds and / or projections correspond. This can be done in a simple manner while maintaining relatively tight tolerances Attach tabs and / or projections to the sheet.
  • a rectangular tube for a Heat exchanger, in particular for an exhaust gas heat exchanger is composed of two U-shaped thin sheet metal shells, with the features of claim 9.
  • the rectangular tube 10 shown in FIGS. 1 and 2, which is approximately in is drawn to four times its normal size is to Use in a heat exchanger and in particular a Exhaust heat exchanger determined.
  • a tube bundle is formed, which leads to the leadership is determined by exhaust.
  • the ends of the tube bundles are each arranged in a gas-tight tube sheet, the Tube sheets together with an outer jacket surrounding the tube bundle a housing for guiding a liquid coolant form.
  • This housing is between the two tube sheets with an inlet and an outlet for the liquid coolant Mistake.
  • Such an exhaust gas heat exchanger is not in the previously published German patent application P 195 40 683.4 disclosed.
  • the rectangular tube 10 is made of two U-shaped thin sheet metal shells 11, 12 composed, which at their webs close together are connected, in particular welded. From the floors the two sheet metal shells 11, 12 protrude to the interior of the Rectangular tube 10 out tabs 13, 14 from, which is about about a quarter to a third of the height of the rectangular tube extend.
  • the tabs 13, 14 are each symmetrical in pairs arranged to the longitudinal center of the rectangular tube 10. she run in the flow direction of the gas to be guided V-shaped apart, with their flow direction facing ends keep a distance to each other.
  • the paired arranged Tabs 13, 14 are repeated over the length of Rectangular tube 10 at regular intervals.
  • the Sheet metal shells 11, 12 offset in such a way to each other, that the tabs 13, 14 of the bottoms of the sheet metal shell 11th and the sheet metal shell 12 offset in the longitudinal direction to each other are arranged.
  • the tabs 13, 14 are from the bottoms of the sheet metal shells 11, 12 by means of massive forming and in particular by means of a Extruded molding.
  • the thin sheet strips, later transformed into thin sheet half shells 11, 12 become flat between a die and a stamp loaded with pressure such that the yield point of Sheet material is exceeded and a part of the sheet material in slots of a die (or stamp) flows in, which determine the shape of the tabs 13, 14.
  • the strips of sheet metal are made by means of a circular surface loaded, which surrounds the two tabs 13, 14. It can, however still other load areas are provided, for example square or rectangular areas or areas, adapted to the contour of the tabs to be formed 13, 14 are.
  • the thin sheet metal strips which have a sheet thickness of not more than 1.0 mm, are by means of extrusion to about 70% to about 50% of their original sheet thickness compressed, causing tabs 13, 14 from a height whose height is easily 1.5 times the original one Can be sheet thickness.
  • a device is shown schematically by means of that performs the massive forming to form the tabs according to the invention can be.
  • the device has a lower part 15, in which a die 16 is arranged.
  • the die 16 has a recess 17, in which a sheet-metal strip 18 is inserted is.
  • the thin sheet strip 18 is by means of the lower part 15 mounted guides 19 held in the recess 17.
  • In the die 16 are slot-shaped recesses 20th provided as negative forms for the tabs to be formed 13, 14 serve.
  • a stamp 22 In a lower part 15 under application of a compressive force undeliverable upper part 21, a stamp 22 is held, the between the guides 19 the sheet-metal strip 18 deliverable is, covering the area of the recesses 20 areally.
  • the punch 22 has a flat, to the thin sheet 18 parallel punch surface 23, which is the area of the recesses 20 of the die 16 in a sufficiently large area covered.
  • the stamp 22 is with its stamp face 23rd pressed into the sheet-metal strip 18 with sufficient force, so that the flow limit of the sheet material exceeded becomes. Part of the sheet material then flows into the recesses 20 and forms the tabs 13, 14, which in Fig. 1 and 2 are shown.
  • the thin sheet is in the area the stamp surface 23 to about 70% to about 50% of the original Sheet thickness compressed.
  • the impression depth depends on the height of the tabs to be formed. Conveniently, is the penetration depth of the punch surface 23 of the punch 22 limited by a depth stop.
  • the recesses 20 may be open slots or have a depth that greater than the desired height of the tabs.
  • the high of Lashing is determined by the indentation depth with which the Stamping surface 23 is pressed into the sheet 18. To mention is still that in the extrusion for extrusion usual lubricants are used to the punching time of the tool.
  • the extrusion can be carried out in a cold state. If the extrusion in a semi-warm state, for example up to 600 ° C or in the warm state, for example up to 1200 ° C, is carried out, it increases the flowability of the Sheet metal, so that smaller forming forces required are.
  • a material for the sheet-metal strips for example a steel with the number 1.4539 proved to be applicable.
  • the pairs of tabs 13, 14 intermittently form by the sheet 18 advanced intermittently and the Extrusion process by feeding the punch 22 also is performed in cycles. It is also possible, however similar extrusion by rolling the fine sheet strip perform. It can also be provided that a Median strip in which the tabs 13, 14 by massive forming be formed, constantly extruded and squeezed with it while still the tabs only in regular Distances are formed.
  • a die 16 provided with a flat bearing surface, while the recesses 20 corresponding recesses in the punch 22 in Area of the punch surface 23 are provided.
  • the recesses 20 in the die 16 has the advantage that the gas-carrying side of a formed from the sheet metal strip 18 Pipe except for the flaps 13, 14 smooth inner walls so that a deposit of solid particles or the like. is avoided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Automatic Assembly (AREA)
  • Exhaust Silencers (AREA)

Claims (10)

  1. Procédé pour la réalisation de languettes et/ou de saillies sur une tôle mince, notamment sur une bande de tôle mince, saillantes essentiellement à angle droit de la surface de la tôle fine et présentant une hauteur supérieure à l'épaisseur de tôle, caractérisé en ce que les languettes (13, 14) et/ou saillies sont formées par filage de la tôle fine (17), ladite tôle fine subissant une contrainte plane et une partie du matériau de tôle étant poinçonnée pour former un ou plusieurs évidements d'une matrice et/ou d'une estampe.
  2. Procédé selon la revendication 1, caractérisé en ce que la tôle fine est contrainte par une surface circulaire, une surface rectangulaire, notamment carrée, ou par une surface ajustée au contour des languettes et/ou saillies à former.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que les languettes (13, 14) et/ou saillies sont formées par approche cyclique de l'étampe (22) et de la matrice (16) et avance cyclique de la tôle fine, notamment de la bande de tôle fine (18).
  4. Procédé selon la revendication 1 ou 2, caractérisé en ce que le formage massif de la tôle fine et notamment de la bande de tôle fine (18) pour la réalisation de languettes et/ou de saillies est exécuté par laminage continu.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la tôle fine (18) est déformée par filage dans la zone des languettes (13, 14) et ou/saillies sur 70 % à 50 % environ de l'épaisseur initiale de tôle.
  6. Tôle fine, notamment bande de tôle fine, à la surface de laquelle font saillie des languettes et/ou saillies massives présentant une hauteur supérieure à l'épaisseur de tôle, caractérisée en ce que les languettes (13, 14) et/ou les saillies sont formées par filage à contrainte plane de la tôle fine (18).
  7. Tôle fine selon la revendication 6, caractérisée en ce que la tôle fine (18) est emboutie dans la zone des languettes (13, 14) et ou/saillies sur 70 % à 50 % environ de l'épaisseur initiale de tôle
  8. Tôle fine selon la revendication 7, caractérisée en ce que les languettes (13, 14) et/ou saillies se trouvent sur le côté de la surface de base qui n'est pas embouti.
  9. Tube à section rectangulaire pour un échangeur thermique, notamment pour un échangeur de chaleur de gaz brûlés, composé de deux coques de tôle fine en U, où des languettes massives disposées par paires, s'écartant en V l'une de l'autre dans le sens de l'écoulement, font saillie vers l'intérieur depuis la base d'une des tôles en coque fine au moins, lesdites languettes (13, 14) étant formées par filage à contrainte plane de la tôle fine sur la base d'une des coques de tôle fine (11, 12) au moins.
  10. Echangeur thermique, notamment échangeur de chaleur de gaz brûlés, avec une pluralité de tubes à section rectangulaire dont les extrémités sont disposées dans des fonds de tubes, caractérisé en ce qu'au moins un tube à section rectangulaire est formé selon la revendication 9.
EP97120668A 1996-12-24 1997-11-26 Procédé pour la réalisation de languettes et/ou de saillies sur une tôle mince, tôle mince avec languettes et/ou saillies et tube en tôle mince à section rectangulaire Expired - Lifetime EP0851200B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19654367A DE19654367A1 (de) 1996-12-24 1996-12-24 Verfahren zum Anbringen von Laschen und/oder Vorsprüngen an einem Feinblech und Feinblech mit Laschen und/oder Vorrichtungen sowie Rechteckrohr aus Feinblechen
DE19654367 1996-12-24

Publications (4)

Publication Number Publication Date
EP0851200A2 EP0851200A2 (fr) 1998-07-01
EP0851200A3 EP0851200A3 (fr) 1999-05-12
EP0851200B1 true EP0851200B1 (fr) 2005-01-26
EP0851200B2 EP0851200B2 (fr) 2010-03-17

Family

ID=7816220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97120668A Expired - Lifetime EP0851200B2 (fr) 1996-12-24 1997-11-26 Procédé pour la réalisation de languettes et/ou de saillies sur une tôle mince, tôle mince avec languettes et/ou saillies et tube en tôle mince à section rectangulaire

Country Status (4)

Country Link
US (1) US6070616A (fr)
EP (1) EP0851200B2 (fr)
JP (1) JPH10193017A (fr)
DE (2) DE19654367A1 (fr)

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DE102004045018B4 (de) * 2003-09-30 2019-08-01 Mahle International Gmbh Verfahren zur Herstellung eines flachen Rohres für einen Wärmetauscher eines Kraftfahrzeugs, flaches Rohr, Verfahren zur Herstellung eines Wärmetauschers und Wärmetauscher
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Also Published As

Publication number Publication date
EP0851200A2 (fr) 1998-07-01
DE19654367A1 (de) 1998-06-25
JPH10193017A (ja) 1998-07-28
US6070616A (en) 2000-06-06
EP0851200B2 (fr) 2010-03-17
DE59712183D1 (de) 2005-03-03
EP0851200A3 (fr) 1999-05-12

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