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EP0533574A1 - 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
EP0533574A1
EP0533574A1 EP92402555A EP92402555A EP0533574A1 EP 0533574 A1 EP0533574 A1 EP 0533574A1 EP 92402555 A EP92402555 A EP 92402555A EP 92402555 A EP92402555 A EP 92402555A EP 0533574 A1 EP0533574 A1 EP 0533574A1
Authority
EP
European Patent Office
Prior art keywords
tubular wall
opening
punch
cylindrical
cylindrical surface
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
EP92402555A
Other languages
German (de)
French (fr)
Other versions
EP0533574B1 (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.)
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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 exchanger heat exchanger boxes, and in particular 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 for making 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 generatrices of its cylindrical surface relative to the tubular wall so that the cutting edge comes in contact with it from the outside and passes through its thickness by forming the opening, the peripheral surface of the latter being entirely in contact, at the end of the stroke of the punch, with the cylindrical surface of the latter.
  • This process 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 generatrices 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 all 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 outside from 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, a portion flared outward and extending from the external face of the tubular wall over at least a fraction of the thickness thereof.
  • the flared portion extends only over a fraction of the thickness of the wall, it can be connected, in said end regions, to a portion of cylindrical surface extending over the remaining fraction and by consequently adjacent to the internal face 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 whose peripheral surface 6, 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)

Abstract

In order to produce an opening (6) passing right through a tubular wall (1) of a fluid box of a heat exchanger, a punch (2) is used having a cylindrical external surface (3) terminating in a cutting edge (4), the punch being moved in the direction (F) of the generatrices of its cylindrical surface in relation to the tubular wall so that the cutting edge comes into contact with the latter via the outside and passes through its thickness, thereby forming the opening. According to the invention, this cylindrical surface is connected, opposite the cutting edge, on at least part of its perimeter, to a surface portion (8) of the punch, this portion being inclined outwards 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. The flaring of the opening permits alignment and easy insertion of the end of a tube into the opening. <IMAGE>

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 exchanger heat exchanger boxes, and in particular 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 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 for making 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 generatrices of its cylindrical surface relative to the tubular wall so that the cutting edge comes in contact with it from the outside and passes through its thickness by forming the opening, the peripheral surface of the latter being entirely in contact, at the end of the stroke of the punch, with the cylindrical surface of the latter.

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.This process 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 generatrices 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 all the greater the greater the number of tubes to be placed simultaneously.

Le but de l'invention est de remédier 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 outside from 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 tubular wall, two portions of inclined surfaces are advantageously provided, adjacent respectively to the two ends of the cross section of the cylindrical surface . It is in fact 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 et s'étendant à partir de la face externe de la paroi tubulaire sur une fraction au moins de l'épaisseur de celle-ci.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, a portion flared outward and extending from the external face of the tubular wall over at least a fraction of the thickness thereof.

Dans le cas où la portion évasée ne s'étend que sur une fraction de l'épaisseur de la paroi, elle peut se raccorder, dans lesdites régions d'extrémités, à une portion de surface cylindrique s'étendant sur la fraction restante et par conséquent adjacente à la face interne de la paroi tubulaire.In the case where the flared portion extends only over a fraction of the thickness of the wall, it can be connected, in said end regions, to a portion of cylindrical surface extending over the remaining fraction and by consequently adjacent to the internal face 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 repésentée 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 represented 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 whose peripheral surface 6, 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 therefor 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 (5)

Procédé de réalisation d'une ouverture traversante (6) dans une paroi tubulaire (1) de boîte à fluide d'un échangeur de chaleur au moyen d'un poinçon (2) présentant une surface extérieure cylindrique (3) terminée par une arête coupante (4), le poinçon étant déplacé dans la direction (F) 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, caractérisé en ce que 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 (8) du poinçon inclinée vers l'extérieur à partir de la surface cylindrique, et en ce que, 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.Method for producing a through opening (6) in a tubular wall (1) of a heat exchanger fluid box by means of a punch (2) having a cylindrical outer surface (3) terminated by a cutting edge (4), the punch being moved in the direction (F) of the generatrices of its cylindrical surface relative to the tubular wall so that the cutting edge comes into contact with the latter from the outside and crosses its thickness forming the opening, characterized in that said cylindrical surface is connected, opposite the cutting edge, over at least part of its perimeter, to a surface portion (8) of the punch inclined outwards from of the cylindrical surface, and in that, at the end of the working stroke of the punch, the inclined surface portion deforms the tubular wall so as to flare the opening. Procédé selon la revendication 1, caractérisé en ce que, dans la position de fin de course du poinçon, la portion de surface inclinée est en contact avec une portion évasée (6a) de la surface périphérique de l'ouverture adjacente à la face externe (7) de la paroi tubulaire, tandis que la surface cylindrique du poinçon, dans ladite partie de son périmètre, est au contact avec une portion cylindrique (6b) de la surface périphérique de l'ouverture adjacente à la face interne (9) de la paroi tubulaire.Method according to claim 1, characterized in that, in the end position of the punch, the inclined surface portion is in contact with a flared portion (6a) of the peripheral surface of the opening adjacent to the external face ( 7) of the tubular wall, while the cylindrical surface of the punch, in said part of its perimeter, is in contact with a cylindrical portion (6b) of the peripheral surface of the opening adjacent to the internal face (9) of the tubular wall. Procédé selon l'une des revendications 1 et 2, caractérisé en ce que l'ouverture et la section transversale de la surface cylindrique du poinçon sont allongées dans la direction circonférentielle de la paroi tubulaire, et que deux portions de surface inclinées (8) sont prévues, adjacentes respectivement aux deux extrémités de la section transversale de la surface cylindrique.Method according to one of claims 1 and 2, characterized in that the opening and the cross section of the cylindrical surface of the punch are elongated in the circumferential direction of the tubular wall, and that two inclined surface portions (8) are provided, adjacent respectively to the two ends of the cross section of the cylindrical surface. Paroi tubulaire (1) pour boîte à fluide d'échangeur de chaleur telle qu'on peut l'obtenir par le procédé selon l'une des revendications précédentes, comportant des ouvertures traversantes allongées dans sa direction circonférentielle et dont la surface périphérique présente, dans les régions d'extrémités des ouvertures, une portion (6a) évasée vers l'extérieur et s'étendant à partir de la face externe (7) de la paroi tubulaire sur une fraction au moins de l'épaisseur de celle-ci.Tubular wall (1) for a heat exchanger fluid box as can be obtained by the method according to one of the preceding claims, comprising through openings elongated in its circumferential direction and whose peripheral surface has, in the end regions of the openings, a portion (6a) flared outwards and extending from the external face (7) of the tubular wall on a at least a fraction of its thickness. Paroi selon la revendication 4, caractérisée en ce que ladite portion (6a) évasée se raccorde, dans lesdites régions d'extrémités, à une portion de surface cylindrique (6b) s'étendant sur la fraction restante de l'épaisseur de la paroi.Wall according to claim 4, characterized in that said flared portion (6a) is connected, in said end regions, to a cylindrical surface portion (6b) extending over the remaining fraction of the thickness of the wall.
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
FR9111571 1991-09-19
FR9111571A FR2681540B1 (en) 1991-09-19 1991-09-19 METHOD OF PUNCHING A THROUGH OPENING IN A TUBULAR WALL, AND TUBULAR WALL OBTAINED.

Publications (2)

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

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

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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)

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FR2717110A1 (en) * 1994-03-08 1995-09-15 Alcan France Punching tool for metal profiles
EP0840083A3 (en) * 1996-10-30 1998-10-14 Ford Motor Company A baffle for a heat exchanger
EP0872294A1 (en) * 1997-04-16 1998-10-21 CESA Compagnie Européenne de Sièges pour Automobiles Punch for making a hole in a metal plate
WO2000055561A1 (en) * 1999-03-15 2000-09-21 Behr Gmbh & Co. Collector tube for a heat transfer unit and method for producing same
CZ298876B6 (en) * 2003-07-04 2008-03-05 Visteon Global Technologies, Inc. Method for punching tubes, particularly for air-conditioning systems

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GB2339871A (en) * 1998-07-03 2000-02-09 Glynwed Pipe Systems Ltd Punch and coupling
JP4438203B2 (en) * 2000-09-12 2010-03-24 株式会社デンソー Pipe drilling method and apparatus
EP1195570B1 (en) * 2000-10-06 2003-08-20 Visteon Global Technologies, Inc. Method of making 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
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

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2717110A1 (en) * 1994-03-08 1995-09-15 Alcan France Punching tool for metal profiles
EP0840083A3 (en) * 1996-10-30 1998-10-14 Ford Motor Company A baffle for a heat exchanger
EP0872294A1 (en) * 1997-04-16 1998-10-21 CESA Compagnie Européenne de Sièges pour Automobiles Punch for making a hole in a metal plate
FR2762242A1 (en) * 1997-04-16 1998-10-23 Cesa PUNCH FOR FORMING A HOLE IN A METAL WALL
WO2000055561A1 (en) * 1999-03-15 2000-09-21 Behr Gmbh & Co. Collector tube for a heat transfer unit and method for producing same
US6993838B1 (en) 1999-03-15 2006-02-07 Behr Gmbh & Co. Collector tube for a heat transfer unit and method for producing same
CZ298876B6 (en) * 2003-07-04 2008-03-05 Visteon Global Technologies, Inc. Method for punching tubes, particularly for air-conditioning systems

Also Published As

Publication number Publication date
DE69200822D1 (en) 1995-01-19
US5421086A (en) 1995-06-06
JPH06106255A (en) 1994-04-19
DE69200822T2 (en) 1995-04-13
MX9205343A (en) 1993-07-01
FR2681540B1 (en) 1993-12-03
FR2681540A1 (en) 1993-03-26
ES2068015T3 (en) 1995-04-01
EP0533574B1 (en) 1994-12-07
BR9203651A (en) 1993-04-13

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