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EP0533574B1 - Method of punching an opening in a tubular wall and tubular wall thus obtained - Google Patents

Method of punching an opening in a tubular wall and tubular wall thus obtained 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
Other languages
German (de)
French (fr)
Other versions
EP0533574A1 (en
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/en
Application granted granted Critical
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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)

Description

L'invention concerne la fabrication des parois tubulaires de boîtes à fluide d'échangeurs de chaleur, et notamment de celles utilisées dans les condenseurs des installations de climatisation de véhicules automobiles. Plus particulièrement, l'invention concerne la réalisation dans une paroi tubulaire des ouvertures traversantes destinées à recevoir les extrémités des tubes de circulation de fluide de l'échangeur de chaleur.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.

Un procédé connu, notamment par le document "HERSTELLUNG LANGLOCHARTIGER AUSSCHNITTE IN ROHREN", pour réaliser une telle ouverture traversante utilise un poinçon présentant une surface extérieure cylindrique terminée par une arête coupante, le poinçon étant déplacé dans la direction des génératrices de sa surface cylindrique par rapport à la paroi tubulaire de façon que l'arête coupante vienne en contact avec celle-ci par l'extérieur et traverse son épaisseur en formant l'ouverture, la surface périphérique de cette dernière étant entièrement en contact, à la fin de la course du poinçon, avec la surface cylindrique de celui-ci.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.

Ce procédé conduit à une ouverture traversante dont la surface périphérique est cylindrique et se raccorde à la face externe de la paroi tubulaire, dans ses parties les plus éloignées du plan axial de la paroi tubulaire parallèle aux génératrices de la surface cylindrique du poinçon, selon un angle aigu. Cet angle de raccordement aigu définit une arête coupante qui, lors de l'insertion de l'extrémité du tube dans l'ouverture, arrachera un copeau sur celui-ci s'il n'est pas parfaitement aligné avec l'ouverture, ce risque étant d'autant plus grand que le nombre de tubes à mettre en place simultanément est plus élevé. Selon une variante du procédé connu, il est possible de réaliser une ouverture évasée par trois opérations de poinçonnage, la paroi étant maintenue chaque fois dans une position différente.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. According to a variant of the known method, it is possible to produce a flared opening by three punching operations, the wall being maintained each time in a different position.

Le but de l'invention est de rémédier à cet inconvénient.The object of the invention is to remedy this drawback.

Selon l'invention, dans un procédé tel que défini ci-dessus, ladite surface cylindrique se raccorde, à l'opposé de l'arête coupante, sur une partie au moins de son périmètre, à une portion de surface du poinçon inclinée vers l'extérieur à partir de la surface cylindrique, et, à la fin de la course de travail du poinçon, la portion de surface inclinée vient déformer la paroi tubulaire de façon à évaser l'ouverture. Cet évasement de l'ouverture assure un centrage de l'extrémité du tube et son introduction facile et sans détérioration dans l'ouverture.According to the invention, in a method as defined above, 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.

De préférence, dans la position de fin de course du poinçon, la portion de surface inclinée est en contact avec une portion évasée de la surface périphérique de l'ouverture adjacente à la surface externe de la paroi tubulaire, tandis que la surface cylindrique du poinçon, dans ladite partie de son périmètre, est en contact avec une portion cylindrique de la surface périphérique de l'ouverture adjacente à la surface interne de la paroi tubulaire. Ainsi, le tube est d'abord centré par la portion extérieure évasée de la surface de l'ouverture, puis guidé avec un jeu minimal par la portion cylindrique intérieure de cette surface.Preferably, in the end position of the punch, 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. Thus, 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.

Dans le cas où l'ouverture et la section transversale de la surface cylindrique du poinçon sont allongées dans la direction circonférentielle de la paroi tubulaire, deux portions de surfaces inclinées sont avantageusement prévues, adjacentes respectivement aux deux extrémités de la section transversale de la surface cylindrique. C'est en effet au niveau de ces deux extrémités que l'angle de raccordement de la surface cylindrique de l'ouverture, en l'absence d'évasement, et de la face externe de la paroi tubulaire serait le plus aigu. De plus, le centrage du tube aux deux extrémités de sa section transversale allongée suffit pour assurer son positionnement complet.In the case where the opening and the cross section of the cylindrical surface of the punch are elongated in the circumferential direction of the wall tubular, two portions of inclined surfaces are advantageously provided, respectively adjacent to the two ends of the cross section of the cylindrical surface. It is indeed at these two ends that the connection angle of the cylindrical surface of the opening, in the absence of flaring, and of the external face of the tubular wall would be most acute. In addition, centering the tube at the two ends of its elongated cross section is sufficient to ensure its complete positioning.

L'invention vise également une paroi tubulaire pour boîte à fluide d'échangeur de chaleur telle qu'on peut l'obtenir par le procédé défini ci-dessus, comportant des ouvertures traversantes allongées dans sa direction circonférentielle et dont la surface périphérique présente, dans les régions d'extrémités des ouvertures, une portion évasée vers l'extérieur caractérisée en ce que ladite portion évasée s'étend à partir de la face externe de la paroi tubulaire sur une fraction de l'épaisseur de celle-ci et se raccorde à une portion de surface cylindrique s'étendant sur la fraction restante de l'épaisseur de la paroi tubulaire.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.

D'autres caractéristiques et avantages de l'invention ressortiront de la description détaillée donnée ci-après d'un exemple de réalisation, et des dessins annexés dans lesquels :

  • la figure 1 est une vue en coupe axiale d'une paroi tubulaire de boîte à fluide montrant deux phases successives du procédé selon l'invention ;
  • la figure 2 est une vue partielle de côté dans la seconde de ces phases, la paroi tubulaire étant représentée en coupe axiale ; et
  • la figure 3 est une vue partielle en élévation de cette même paroi tubulaire montrant un tube de circulation introduit dans l'ouverture terminée.
Other characteristics and advantages of the invention will emerge from the detailed description given below of an exemplary embodiment, and from the appended drawings in which:
  • Figure 1 is an axial sectional view of a tubular wall of a fluid box showing two successive phases of the method according to the invention;
  • Figure 2 is a partial side view in the second of these phases, the tubular wall being shown in axial section; and
  • Figure 3 is a partial elevational view of the same tubular wall showing a circulation tube inserted into the finished opening.

La figure 1 montre la réalisation d'une ouverture traversante dans la paroi tubulaire 1 d'une boîte à fluide d'échangeur de chaleur au moyen d'un poinçon 2 présentant une surface extérieure cylindrique 3 se raccordant à une extrémité à une partie rétrécie 4 définissant une arête coupante. Le poinçon est déplacé par rapport à la paroi 1 dans le sens de la flèche F, parallèlement aux génératrices de la surface cylindrique 3. Dans la moitié gauche de la figure 1, l'arête 4 a essentiellement traversé l'épaisseur de la paroi 1 et formé une ouverture 5 dont la surface périphérique 6, dans sa région adjacente à la face externe 7 de la paroi 1, est cylindrique et en contact avec la surface extérieure cylindrique 3 du poinçon. Cette surface cylindrique 6 se raccorde à la face 7, dans les régions les plus éloignées du plan axial P de la paroi 1 parallèle à la flèche F, selon un angle aigu de faible valeur. Si le mouvement d'avance du poinçon était arrêté à ce stade, comme c'est le cas dans le procédé connu, l'arête définie par cet angle aigu risquerait de détériorer le tube qui sera ultérieurement présenté pour pénétrer dans l'ouverture, et même d'empêcher son introduction.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. In the left half of FIG. 1, 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.

Selon l'invention, la surface cylindrique 3 du poinçon 2 se raccorde, à l'opposé de l'arête 4, à une portion de surface 8 inclinée vers l'extérieur à partir de la surface cylindrique 3. A la fin de la course de travail du poinçon, comme montré dans la moitié droite de la figure 1, cette portion de surface inclinée 8 vient déformer la paroi tubulaire de façon à évaser l'ouverture, qui est allongée dans la direction circonférentielle de la paroi tubulaire, au voisinage de ses deux extrémités. La portion de surface inclinée 8 est alors en contact avec des portions évasées 6a de la surface périphérique de l'ouverture adjacentes à la face externe 7 de la paroi tubulaire, tandis que la surface cylindrique 3 du poinçon est en contact avec des portions cylindriques 6b de la surface périphérique de l'ouverture, également au voisinage des extrémités de celle-ci, adjacentes à la surface interne 9 de la paroi 1. En revanche, comme montré à la figure 2, dans la région du plan P, où la pénétration de l'arête 4 du poinçon forme dans la paroi 1 une dépression 10 dans laquelle la face externe 7 est inclinée par rapport à l'axe longitudinal 11 de la paroi tubulaire, seule la surface cylindrique 3 vient en contact avec la surface périphérique de l'ouverture 5, définissant pour celle-ci deux portions de surface 6c qui s'étendent dans des plans perpendiculaires à l'axe de la paroi tubulaire 1, sur toute l'épaisseur de celle-ci. Ces portions de surface 6c se raccordent à la face externe 7 selon un angle obtus, de sorte que le centrage du tube dans la direction de l'axe 11 est assuré. Il n'est donc pas utile que la portion de surface inclinée 8 du poinçon s'étende sur tout le périmètre de celui-ci. Elle est donc limitée à deux portions séparées dans les régions les plus éloignées du plan P.According to the invention, 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. At the end of the stroke of the punch, as shown in the right half of FIG. 1, 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. On the other hand, as shown in FIG. 2, in the region of the plane P, where the penetration of the edge 4 of the punch forms in the wall 1 a depression 10 in which the external face 7 is inclined relative to the longitudinal axis 11 of the tubular wall, only the cylindrical surface 3 comes into contact with the peripheral surface of the 'opening 5, defining for it two surface portions 6c which extend in planes perpendicular to the axis of the tubular wall 1, over the entire thickness thereof. These surface portions 6c are connected to the external face 7 at an obtuse angle, so that the centering of the tube in the direction of the axis 11 is ensured. It is therefore not useful for the inclined surface portion 8 of the punch to extend over the entire perimeter thereof. It is therefore limited to two separate portions in the regions furthest from the plane P.

Les portions de surface évasées 6a, dont l'étendue est limitée aussi bien dans la direction de l'épaisseur de la paroi 1, comme montré à la figure 1, que dans la direction circonférentielle de l'ouverture 5, comme montré aux figures 2 et 3, assurent un centrage de l'extrémité du tube 12 dans la direction perpendiculaire au plan P et une introduction facile de celle-ci dans l'ouverture, les portions de surface cylindriques 6b et 6c maintenant avec précision le positionnement final du tube.The flared surface portions 6a, the extent of which is limited both in the direction of the thickness of the wall 1, as shown in FIG. 1, and in the circumferential direction of the opening 5, as shown in FIGS. 2 and 3, 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.

Claims (4)

  1. A method of forming a through aperture (6) in a tubular wall (1) of a heat exchanger header, by means of a punch (2) having a cylindrical outer surface (3) terminating in a cutting edge (4), the punch (2) being displaced in the direction (F) of the generatrices of the cylindrical surface (3) with respect to the tubular wall (1), in such a way that the cutting edge (4) comes into contact with the latter from the outside and passes through its thickness so as to form the aperture (6), characterized in that the said cylindrical surface (3) is joined, remotely from the cutting edge (4) and over at least part of its perimeter, to a surface portion (8) of the punch which is inclined outwardly from the cylindrical surface (3) , and in that, at the end of the working stroke of the punch (2), the inclined surface portion deforms the tubular wall (1) so as to expand the aperture (6).
  2. A method according to Claim 1, characterized in that in the position of the punch (2) at the end of its stroke, the inclined surface portion is in contact with a flared portion (6a) of the peripheral surface of the aperture (6) adjacent to the outer face (7) of the tubular wall (1), while the cylindrical surface of the punch (3), in the said portion of its perimeter, is in contact with a cylindrical portion (6b) of the peripheral surface of the aperture (6) adjacent to the inner face (9) of the tubular wall (1).
  3. A method according to Claim 1 or Claim 2, characterized in that the aperture (6) and the transverse cross section of the cylindrical surface (3) of the punch (2) are elongated in the circumferential direction of the tubular wall (1), and in that two inclined surface portions (8) are provided, being respectively adjacent to the two ends of the transverse cross section of the cylindrical surface.
  4. A tubular wall (1) for a heat exchanger header, such that it can be made by the method according to one of the preceding Claims and having through apertures which are elongated in its circumferential direction, and which have in their peripheral surface, in the end regions of the apertures, a portion (6a) which is flared outwardly, characterized in that the said flared portion (6a) extends from the outer face (7) of the tubular wall (1) over a fraction of the thickness of the latter, and in that the said flared portion (6a) is joined to a cylindrical surface portion (6b) extending over the remaining fraction of the thickness of the wall (1).
EP92402555A 1991-09-19 1992-09-17 Method of punching an opening in a tubular wall and tubular wall thus obtained Revoked EP0533574B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9111571A FR2681540B1 (en) 1991-09-19 1991-09-19 METHOD OF PUNCHING A THROUGH OPENING IN A TUBULAR WALL, AND TUBULAR WALL OBTAINED.
FR9111571 1991-09-19

Publications (2)

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

Family

ID=9417110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92402555A Revoked EP0533574B1 (en) 1991-09-19 1992-09-17 Method of punching an opening in a tubular wall and tubular wall thus obtained

Country Status (8)

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

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2717110B1 (en) * 1994-03-08 1996-07-05 Alcan France Punching tool for metal profile.
EP0840083A3 (en) * 1996-10-30 1998-10-14 Ford Motor Company A baffle for a heat exchanger
FR2762242B1 (en) * 1997-04-16 1999-07-16 Cesa PUNCH FOR FORMING A HOLE IN A METAL WALL
GB2339871A (en) * 1998-07-03 2000-02-09 Glynwed Pipe Systems Ltd Punch and coupling
DE19911334A1 (en) 1999-03-15 2000-09-21 Behr Gmbh & Co Collecting tube for a heat exchanger and manufacturing process therefor
JP4438203B2 (en) * 2000-09-12 2010-03-24 株式会社デンソー Pipe drilling method and apparatus
DE60100617T2 (en) * 2000-10-06 2004-06-09 Visteon Global Technologies, Inc., Dearborn Manufacture of a tube for a heat exchanger
DE10103176B4 (en) * 2001-01-22 2010-06-02 Behr Gmbh & Co. Kg Method for introducing Flachrohreinsteckschlitzen in a manifold
US7017461B2 (en) * 2002-11-12 2006-03-28 Ssd Control Technology Inc. Dual position automatic notcher
CZ298876B6 (en) * 2003-07-04 2008-03-05 Visteon Global Technologies, Inc. Method for punching tubes, particularly for air-conditioning systems
US20080060199A1 (en) * 2006-07-25 2008-03-13 Christopher Alfred Fuller Method of manufacturing a manifold
JP5633083B1 (en) * 2013-10-07 2014-12-03 株式会社三和精機 Header for heat exchanger, heat exchanger provided with the header, and method for manufacturing the header
US11931790B1 (en) 2020-08-28 2024-03-19 Charles D. Hayes Punching device making large rectangular holes in rectangular tubing and method thereof
JP2025092279A (en) * 2023-12-08 2025-06-19 株式会社ダイセル Perforator and gas ejector

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
BR9203651A (en) 1993-04-13
FR2681540A1 (en) 1993-03-26
ES2068015T3 (en) 1995-04-01
DE69200822D1 (en) 1995-01-19
JPH06106255A (en) 1994-04-19
MX9205343A (en) 1993-07-01
FR2681540B1 (en) 1993-12-03
EP0533574A1 (en) 1993-03-24
US5421086A (en) 1995-06-06
DE69200822T2 (en) 1995-04-13

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