EP0533574B1 - Verfahren zum Stanzen einer Öffnung in einer rohrförmigen Wand und damit hergestellte rohrförmige Wand - Google Patents

Verfahren zum Stanzen einer Öffnung in einer rohrförmigen Wand und damit hergestellte rohrförmige Wand Download PDF

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Publication number
EP0533574B1
EP0533574B1 EP92402555A EP92402555A EP0533574B1 EP 0533574 B1 EP0533574 B1 EP 0533574B1 EP 92402555 A EP92402555 A EP 92402555A EP 92402555 A EP92402555 A EP 92402555A EP 0533574 B1 EP0533574 B1 EP 0533574B1
Authority
EP
European Patent Office
Prior art keywords
tubular wall
punch
cylindrical
cylindrical surface
opening
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.)
Revoked
Application number
EP92402555A
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English (en)
French (fr)
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EP0533574A1 (de
Inventor
Philippe Le Gauyer
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.)
Valeo Thermique Moteur SA
Original Assignee
Valeo Thermique Moteur 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
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Application filed by Valeo Thermique Moteur SA filed Critical Valeo Thermique Moteur SA
Publication of EP0533574A1 publication Critical patent/EP0533574A1/de
Application granted granted Critical
Publication of EP0533574B1 publication Critical patent/EP0533574B1/de
Anticipated expiration legal-status Critical
Revoked 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0243—Header boxes having a circular cross-section
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/28—Perforating, i.e. punching holes in tubes or other hollow bodies
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49389—Header or manifold making
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49391—Tube making or reforming

Definitions

  • the invention relates to the manufacture of tubular walls of fluid boxes of heat exchangers, and in particular of those used in condensers of air conditioning systems of motor vehicles. More particularly, the invention relates to the production in a tubular wall of through openings intended to receive the ends of the fluid circulation tubes of the heat exchanger.
  • a known method, in particular in the document "HERSTELLUNG LANGLOCHARTIGER AUSSCHNITTE IN ROHREN”, for producing such a through opening uses a punch having a cylindrical outer surface terminated by a cutting edge, the punch being moved in the direction of the generaters of its cylindrical surface by relative to the tubular wall so that the cutting edge comes into contact with the latter from the outside and crosses its thickness by forming the opening, the peripheral surface of the latter being fully in contact, at the end of the stroke of the punch, with the cylindrical surface thereof.
  • This method leads to a through opening, the peripheral surface of which is cylindrical and is connected to the external face of the tubular wall, in its parts furthest from the axial plane of the tubular wall parallel to the generaters of the cylindrical surface of the punch, according to a acute angle.
  • This acute connection angle defines a cutting edge which, when inserting the end of the tube into the opening, will tear a chip on it if it is not perfectly aligned with the opening, this risk being the greater the greater the number of tubes to be placed simultaneously.
  • the object of the invention is to remedy this drawback.
  • said cylindrical surface is connected, opposite the cutting edge, on at least part of its perimeter, to a surface portion of the punch inclined towards the exterior from the cylindrical surface, and, at the end of the working stroke of the punch, the inclined surface portion deforms the tubular wall so as to flare the opening. This flaring of the opening ensures centering of the end of the tube and its easy introduction without deterioration into the opening.
  • the inclined surface portion is in contact with a flared portion of the peripheral surface of the opening adjacent to the external surface of the tubular wall, while the cylindrical surface of the punch , in said part of its perimeter, is in contact with a cylindrical portion of the peripheral surface of the opening adjacent to the internal surface of the tubular wall.
  • the tube is first centered by the outer flared portion of the surface of the opening, then guided with minimal clearance by the inner cylindrical portion of this surface.
  • the invention also relates to a tubular wall for a heat exchanger fluid box as can be obtained by the method defined above, comprising through openings elongated in its circumferential direction and whose peripheral surface has, in the end regions of the openings, an outwardly flared portion characterized in that said flared portion extends from the external face of the tubular wall over a fraction of the thickness thereof and is connected to a portion of cylindrical surface extending over the remaining fraction of the thickness of the tubular wall.
  • Figure 1 shows the embodiment of a through opening in the tubular wall 1 of a heat exchanger fluid box by means of a punch 2 having a cylindrical outer surface 3 connecting at one end to a narrowed part 4 defining a cutting edge.
  • the punch is moved relative to the wall 1 in the direction of the arrow F, parallel to the generatrices of the cylindrical surface 3.
  • the edge 4 has essentially passed through the thickness of the wall 1 and formed an opening 5, the peripheral surface 6 of which, in its region adjacent to the external face 7 of the wall 1, is cylindrical and in contact with the cylindrical external surface 3 of the punch.
  • This cylindrical surface 6 is connected to the face 7, in the regions furthest from the axial plane P of the wall 1 parallel to the arrow F, at an acute angle of small value. If the advance movement of the punch was stopped at this stage, as is the case in the known method, the edge defined by this acute angle would risk damaging the tube which will subsequently be presented to enter the opening, and even prevent its introduction.
  • the cylindrical surface 3 of the punch 2 is connected, opposite the edge 4, to a surface portion 8 inclined outward from the cylindrical surface 3.
  • this inclined surface portion 8 deforms the tubular wall so as to flare the opening, which is elongated in the circumferential direction of the tubular wall, in the vicinity of its two ends.
  • the inclined surface portion 8 is then in contact with flared portions 6a of the peripheral surface of the opening adjacent to the external face 7 of the tubular wall, while the cylindrical surface 3 of the punch is in contact with cylindrical portions 6b of the peripheral surface of the opening, also in the vicinity of the ends of the latter, adjacent to the internal surface 9 of the wall 1.
  • the flared surface portions 6a provide a centering of the end of the tube 12 in the direction perpendicular to the plane P and easy introduction thereof into the opening, the cylindrical surface portions 6b and 6c now precisely maintain the final positioning of the tube.

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

Claims (4)

  1. Verfahren zur Herstellung einer durchgehenden Öffnung (6) in einer rohrförmigen Wand (1) einer Endkammer eines Wärmetauschers anhand eines Stempels (2) mit einer zylindrischen Außenfläche (3), die in einer Schneidkante (4) endet, wobei der Stempel (2) in der Richtung (F) der Erzeugenden seiner zylindrischen Fläche (3) im Verhältnis zur rohrförmigen Wand (1) bewegt wird, so daß die Schneidkante (4) mit dieser von außen in Berührung kommt und durch ihre Dicke hindurchgeht, wodurch die Öffnung (6) gebildet wird, dadurch gekennzeichnet, daß sich die zylindrische Fläche (3) auf der zur Schneidkante (4) entgegengesetzten Seite zumindest auf einem Teil ihres Umfangs an eine Teilfläche (8) des Stempels (2) anschließt, die von der zylindrischen Fläche (3) aus nach außen geneigt ist, und daß am Ende des Arbeitshubs des Stempels (2) die geneigte Teilfläche die rohrförmige Wand (1) so verformt, daß die Öffnung (6) konisch erweitert wird.
  2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß sich in der Endstellung des Stempels (2) die geneigte Teilfläche mit einem konisch erweiterten Abschnitt (6a) der Umfangsfläche der Öffnung (6) in Berührung befindet, der an die Außenseite (7) der rohrförmigen Wand (1) angrenzt, während die zylindrische Fläche (3) des Stempels in dem besagten Teil seines Umfangs mit einem zylindrischen Abschnitt (6b) der Umfangsfläche der Öffnung (6) in Berührung steht, der an die Innenseite (9) der rohrförmigen Wand (1) angrenzt.
  3. Verfahren nach Anspruch 1 und 2 , dadurch gekennzeichnet, daß die Öffnung (6) und der Querschnitt der zylindrischen Fläche (3) des Stempels (2) in der Umfangsrichtung der rohrförmigen Wand (1) länglich ausgebildet sind und daß zwei geneigte Teilflächen (8) vorgesehen sind, die jeweils an die beiden Enden des Querschnitts der zylindrischen Fläche angrenzen.
  4. Rohrförmige Wand (1) für die Endkammer eines Wärmetauschers, wie sie mit dem Verfahren nach einem der vorangehende Ansprüche hergestellt werden kann, die in ihrer Umfangsrichtung länglich ausgebildete durchgehende Öffnungen umfaßt, deren Umfangsfläche in den Endbereichen der Öffnungen einen nach außen konisch erweiterten Abschnitt (6a) aufweist , dadurch gekennzeichnet, daß sich dieser konisch erweiterte Abschnitt (6a) von der Außenseite (7) der rohrförmigen Wand (1) aus über einen Bruchteil ihrer Dicke erstreckt und daß sich dieser konisch erweiterte Abschnitt (6a) an eine zylindrische Teilfläche (6b) anschließt, die sich auf dem verbleibenden Bruchteil der Dicke der rohrförmigen Wand (1) erstreckt.
EP92402555A 1991-09-19 1992-09-17 Verfahren zum Stanzen einer Öffnung in einer rohrförmigen Wand und damit hergestellte rohrförmige Wand Revoked EP0533574B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9111571A FR2681540B1 (fr) 1991-09-19 1991-09-19 Procede de poinconnage d'une ouverture traversante dans une paroi tubulaire, et paroi tubulaire obtenue.
FR9111571 1991-09-19

Publications (2)

Publication Number Publication Date
EP0533574A1 EP0533574A1 (de) 1993-03-24
EP0533574B1 true EP0533574B1 (de) 1994-12-07

Family

ID=9417110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92402555A Revoked EP0533574B1 (de) 1991-09-19 1992-09-17 Verfahren zum Stanzen einer Öffnung in einer rohrförmigen Wand und damit hergestellte rohrförmige Wand

Country Status (8)

Country Link
US (1) US5421086A (de)
EP (1) EP0533574B1 (de)
JP (1) JPH06106255A (de)
BR (1) BR9203651A (de)
DE (1) DE69200822T2 (de)
ES (1) ES2068015T3 (de)
FR (1) FR2681540B1 (de)
MX (1) MX9205343A (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2717110B1 (fr) * 1994-03-08 1996-07-05 Alcan France Outil de poinçonnage pour profilé métallique.
EP0840083A3 (de) * 1996-10-30 1998-10-14 Ford Motor Company Zwischenwand für Wärmetauscher
FR2762242B1 (fr) * 1997-04-16 1999-07-16 Cesa Poincon pour la formation d'un trou dans une paroi metallique
GB2339871A (en) * 1998-07-03 2000-02-09 Glynwed Pipe Systems Ltd Punch and coupling
DE19911334A1 (de) 1999-03-15 2000-09-21 Behr Gmbh & Co Sammelrohr für einen Wärmeübertrager und Herstellungsverfahren hierfür
JP4438203B2 (ja) * 2000-09-12 2010-03-24 株式会社デンソー パイプの穴開け方法及び装置
DE60100617T2 (de) * 2000-10-06 2004-06-09 Visteon Global Technologies, Inc., Dearborn Herstellung eines Rohres für einen Wärmetauscher
DE10103176B4 (de) 2001-01-22 2010-06-02 Behr Gmbh & Co. Kg Verfahren zum Einbringen von Flachrohreinsteckschlitzen in ein Sammelrohr
US7017461B2 (en) * 2002-11-12 2006-03-28 Ssd Control Technology Inc. Dual position automatic notcher
CZ298876B6 (cs) * 2003-07-04 2008-03-05 Visteon Global Technologies, Inc. Zpusob derování trubek, zejména pro klimatizacní systémy
US20080060199A1 (en) * 2006-07-25 2008-03-13 Christopher Alfred Fuller Method of manufacturing a manifold
JP5633083B1 (ja) * 2013-10-07 2014-12-03 株式会社三和精機 熱交換器用のヘッダー、該ヘッダーを備えた熱交換器および当該ヘッダーの製作方法
US11931790B1 (en) 2020-08-28 2024-03-19 Charles D. Hayes Punching device making large rectangular holes in rectangular tubing and method thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2972779A (en) * 1954-06-07 1961-02-28 Baxter Don Inc Plastic tubing process
CA565056A (en) * 1956-03-30 1958-10-21 Koppy Tool And Die Company Tube piercing machine
US3108362A (en) * 1957-10-15 1963-10-29 Huet Andre Method of making tubular heat exchanger
US3158119A (en) * 1961-01-18 1964-11-24 Olin Mathieson Metal working
US5088193A (en) * 1988-09-02 1992-02-18 Sanden Corporation Method for manufacturing a heat exchanger
US5090477A (en) * 1988-10-11 1992-02-25 Brazeway, Inc. Evaporator having integrally baffled tubes
US5172762A (en) * 1989-10-20 1992-12-22 Sanden Corporation Heat exchanger

Also Published As

Publication number Publication date
EP0533574A1 (de) 1993-03-24
ES2068015T3 (es) 1995-04-01
FR2681540B1 (fr) 1993-12-03
MX9205343A (es) 1993-07-01
FR2681540A1 (fr) 1993-03-26
BR9203651A (pt) 1993-04-13
DE69200822T2 (de) 1995-04-13
DE69200822D1 (de) 1995-01-19
JPH06106255A (ja) 1994-04-19
US5421086A (en) 1995-06-06

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