EP0309683B1 - Clamping assembly - Google Patents

Clamping assembly Download PDF

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Publication number
EP0309683B1
EP0309683B1 EP88112529A EP88112529A EP0309683B1 EP 0309683 B1 EP0309683 B1 EP 0309683B1 EP 88112529 A EP88112529 A EP 88112529A EP 88112529 A EP88112529 A EP 88112529A EP 0309683 B1 EP0309683 B1 EP 0309683B1
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EP
European Patent Office
Prior art keywords
flange
deformed
water tank
partial zones
heat exchanger
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
EP88112529A
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German (de)
French (fr)
Other versions
EP0309683A1 (en
Inventor
Herbert Dr.-Ing. Damsohn
Jürgen Höing
Reinhold Heck
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
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Publication date
Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP0309683A1 publication Critical patent/EP0309683A1/en
Application granted granted Critical
Publication of EP0309683B1 publication Critical patent/EP0309683B1/en
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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0224—Header boxes formed by sealing end plates into covers
    • F28F9/0226—Header boxes formed by sealing end plates into covers with resilient gaskets
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/49—Member deformed in situ

Definitions

  • the invention relates to a heat exchanger with at least one flange-provided plastic water tank and a tube sheet carrying a deformable edge area, between which an elastic seal is held under prestress, the deformable edge area running parallel to the flange outer contour before it is deformed and after its production of a clamp connection over the flange of the plastic water tank has approximately wave-shaped deformed first partial areas and non-deformed further partial areas running parallel to the flange outer contour and the first partial areas deformed over the flanges or the flanges of the plastic water tank form the positive connection, in each case the lower edge of the deformed first partial areas on the top or the top of the or the flanges bear under prestress and, in order to facilitate the deformation, the deformed first partial region is parallel and at a distance from an outer edge in H. height of the flange edge or Flanschoberkanten are cut free.
  • Such a heat exchanger is known from DE-OS-28 52 408.
  • the flange of the plastic water tank in particular must be manufactured with tight tolerances. Nevertheless, leaks can occur due to slight unevenness and warping of the plastic.
  • the object of the present invention is to design the heat exchanger described at the outset in such a way that a tight clamping connection is ensured even in the case of greater manufacturing tolerances.
  • the invention provides that the upper side of the flange or the flanges of the plastic water tank have an inclined surface at least partially in the region of the deformed first partial regions, that this inclined surface or inclined surfaces fall towards the flange outer contour and that the lower edge of the deformed first partial regions are deformed in each case over this inclined surface or inclined surfaces.
  • the clamp connection is closed by deforming the first partial areas, the lower edges also slide open to increase the pretension of the elastic seal, which is already pretensioned during assembly during the closing process.
  • a saving of material while at the same time keeping the wall thicknesses constant also in the area of the flange can be achieved in that the flange of the plastic water tank has shaped locking cams and that these locking cams carry the inclined surfaces. Due to the essentially identical wall thicknesses of the plastic water tank, the cooling time during production can be kept short at the same time and a more even filling is achieved during the spraying process, combined with less internal stresses, so that this also improves the dimensional accuracy due to less warpage.
  • the helix angle of the inclined surfaces of the flange is approximately 10 ° with respect to the sealing surface.
  • Figures 1 to 3 show the clamp connection of a heat exchanger, in particular a radiator for motor vehicles in finished, i.e. closed state. It is a plastic water tank 1 and a tube sheet 2 made of metal, which are connected to one another with the interposition of an elastic seal 3 in a liquid-tight and pressure-tight manner. Both parts form the collecting container of a heat exchanger, which is not shown completely, for example a radiator for motor vehicles.
  • the seal 3 is received in a U-shaped outer edge 6 of the tube sheet 2 together with a likewise circumferential flange 4 of the plastic water tank 1.
  • the outer and upper part of the outer edge 6 alternately consists of deformed first partial regions 7 and non-deformed further regions 8.
  • the deformable region 5 therefore has Outer edge 6, as can be seen in Figure 3, a waveform.
  • the deformed first section 7 of the tube sheet 2 must be cut free. In the exemplary embodiment, this takes place through elongated holes 10, the lower edges 9 of which are bent over the flange 4 and are an integral part of the clamp connection.
  • the flange 4 is provided with raised closing cams 11, the outer contours 12 of which are aligned with the flange outer contour 12 'and which have an inclined surface 13 on their upper side.
  • the helix angle 14 of these inclined surfaces with respect to the sealing surface 15 of the tube sheet 2 is approximately 10 °.
  • Plastic water tanks 1 with relatively large manufacturing tolerances, in particular also the flanges 4 with their locking cams 11, can therefore be used without disadvantages, so that significantly fewer rejects have to be sorted out and the tightness of the heat exchangers is nevertheless ensured even at higher internal pressures and higher temperatures.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Clamps And Clips (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Gasket Seals (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Description

Die Erfindung betrifft einen Wärmetauscher mit mindestens einem Flansch versehenen Kunststoffwasserkasten und einem einen verformbaren Randbereich tragenden Rohrboden eines, zwischen denen eine elastische Dichtung unter Vorspannung gehalten ist, wobei der verformbare Randbereich vor seiner Verformung parallel zur Flanschaußenkontur verläuft und nach seiner Herstellung einer Klemmverbindung über den Flansch des Kunststoffwasserkastens etwa wellenförmig verformte erste Teilbereiche und nicht verformte parallel zur Flanschaußenkontur verlaufende weitere Teilbereiche aufweist und dabei die über den oder die Flansche des Kunststoffwasserkastens verformten ersten Teilbereiche die formschlüssige Verbindung bilden, bei der jeweils die Unterkante der verformten ersten Teilbereiche auf der oder den Obersetein des oder der Flansche unter Vorspannung anliegen und bei der, zur Erleichterung der Verformung, die verformten ersten Teilbereich parallel und im Abstand von einer Außenkante in Höhe der Flanschoberkante bzw. Flanschoberkanten freigeschnitten sind.The invention relates to a heat exchanger with at least one flange-provided plastic water tank and a tube sheet carrying a deformable edge area, between which an elastic seal is held under prestress, the deformable edge area running parallel to the flange outer contour before it is deformed and after its production of a clamp connection over the flange of the plastic water tank has approximately wave-shaped deformed first partial areas and non-deformed further partial areas running parallel to the flange outer contour and the first partial areas deformed over the flanges or the flanges of the plastic water tank form the positive connection, in each case the lower edge of the deformed first partial areas on the top or the top of the or the flanges bear under prestress and, in order to facilitate the deformation, the deformed first partial region is parallel and at a distance from an outer edge in H. height of the flange edge or Flanschoberkanten are cut free.

Ein solcher Wärmetauscher ist aus der DE-OS-28 52 408 bekannt. Um ein Dichthalten der dort gezeigten Klemmverbindung auch bei höheren Drücken im Wärmetauscher zu gewährleisten, muß insobesondere der Flansch der Kunststoffwasserkastens mit engen Toleranzen gefertigt werden. Trotzem können durch geringfügige Unebenheiten und Verziehen des Kunststoffs Undichtigkeiten auftreten.Such a heat exchanger is known from DE-OS-28 52 408. In order to ensure that the clamping connection shown there remains sealed even at higher pressures in the heat exchanger, the flange of the plastic water tank in particular must be manufactured with tight tolerances. Nevertheless, leaks can occur due to slight unevenness and warping of the plastic.

In Vermeidung der geschilderten Nachteile liegt der vorliegenden Erfindung die Aufgabe zugrunde den eingangs beschriebenen Wärmetauscher so auszugestalten, daß auch bei größeren Fertigungstoleranzen eine dichte Klemmverbindung gewährleistet ist.In avoiding the disadvantages described, the object of the present invention is to design the heat exchanger described at the outset in such a way that a tight clamping connection is ensured even in the case of greater manufacturing tolerances.

Zur Lösung dieser Aufgabe sieht die Erfindung vor, daß die Oberseite des Flansches oder der Flansche des Kunststoffwasserkastens mindestens teilweise im Bereich der verformten ersten Teilbereiche eine Schrägfläche aufweisen, daß diese Schrägfläche bzw. Schrägflächen gegen die Flanschaußenkontor hin abfallen und daß die Unterkante der verformten ersten Teilbereiche jeweils über diese Schrägfläche bzw. Schrägflächen verformt sind. Beim Schließen der Klemmverbindung durch Verformung der ersten Teilbereiche erfolgt durch das Aufgleiten der Unterkanten noch eine gewisse Erhöhung der Vorspannung der elastischen Dichtung, die bei der Montage beim Schließvorgang bereits vorgespannt ist. Dadurch, daß beim Verformen der ersten Teilbereich jeweils örtlich ein Teil der Schrägfläche des Flansches des Kunststoffwasserkastens durch die Unterkante des verformten ersten Teilbereichs abgeschabt wird, können auch größere Fertigungstoleranzen ohne weiteres ausgeglichen werden, so daß auch größere Maßabweichungen keine Undichtigkeiten der Klemmverbindung verursachen können.To achieve this object, the invention provides that the upper side of the flange or the flanges of the plastic water tank have an inclined surface at least partially in the region of the deformed first partial regions, that this inclined surface or inclined surfaces fall towards the flange outer contour and that the lower edge of the deformed first partial regions are deformed in each case over this inclined surface or inclined surfaces. When the clamp connection is closed by deforming the first partial areas, the lower edges also slide open to increase the pretension of the elastic seal, which is already pretensioned during assembly during the closing process. Due to the fact that when the first partial area is deformed, part of the inclined surface of the flange of the plastic water tank is scraped off locally by the lower edge of the deformed first partial area, larger manufacturing tolerances can also be compensated for, so that even larger dimensional deviations cannot cause any leaks in the clamp connection.

Eine Materialeinsparung bei gleichzeitiger möglichster Konstanthaltung der Wanddicken auch im Bereich des Flansches kann dadurch erreicht werden, daß der Flansch des Kunststoffwasserkastens ausgeformte Schließnocken aufweist und daß diese Schließnocken die Schrägflächen tragen. Durch die im wesentlichen überall gleichen Wandstärken des Kunststoffwasserkastens kann gleichzeitig die Auskühlzeit bei der Produktion kurz gehalten werden und es wird auch ein gleichmäßigeres Füllen beim Spritzvorgang erreicht, verbunden mit weniger inneren Spannungen, so daß hierdurch auch die Maßhaltigkeit wegen geringeren Verzugs verbessert wird.A saving of material while at the same time keeping the wall thicknesses constant also in the area of the flange can be achieved in that the flange of the plastic water tank has shaped locking cams and that these locking cams carry the inclined surfaces. Due to the essentially identical wall thicknesses of the plastic water tank, the cooling time during production can be kept short at the same time and a more even filling is achieved during the spraying process, combined with less internal stresses, so that this also improves the dimensional accuracy due to less warpage.

Weiter können zwischen den Schließnocken höhere, die Schrägflächen überragende Rippenvorsprünge vorgesehen sein, deren Außenkonturen mit der Flanschaußenkontur fluchten. Durch diese fluchtende Ausrichtung der Außenkonturen wird eine Nach-innen-Verformung der durch sie abgestützten nicht verformten Teilbereiche des verformbaren Randbereichs des Rohrbodens verhindert, so daß hier gleichzeitig noch eine Vereinfachung der Montagewerkzeuge bei Erhöhung der Montagesicherheit erreicht wird.Furthermore, higher rib projections, the outer contours of which are aligned with the flange outer contour, can be provided between the locking cams. This aligned alignment of the outer contours prevents inward deformation of the non-deformed partial regions of the deformable edge region of the tube sheet supported by them, so that at the same time simplification of the assembly tools while increasing assembly safety is achieved.

Der Schrägungswinkel der Schrägflächen des Flansches beträgt gegenüber der Dichtfläche etwa 10°.The helix angle of the inclined surfaces of the flange is approximately 10 ° with respect to the sealing surface.

Die Erfindung ist nachfolgend anhand der beiliegenden Zeichnungen eines bevorzugten Ausführungsbeispiels näher erläutert. Es zeigt:

  • Figur 1 eine Teilansicht eines Wärmetauschers mit einer Klemmverbindung in einer Ansicht von vorne,
  • Figur 2 die Klemmverbindung gemäß Fig. 1 in einem Schnitt entlang der Linie 11-11, in größerem Maßstab
  • Figur 3 die Klemmverbindung in einer Ansicht von oben,
  • Figur 4 einen Querschnitt des Flansches des Kunststoffwasserkastens in größerem Maßstab und
  • Figur 5 eine Seitenansicht in Richtung des Pfeils V in Figur 4 auf einen Teilbereich des Flansches.
The invention is explained below with reference to the accompanying drawings of a preferred embodiment. It shows:
  • FIG. 1 shows a partial view of a heat exchanger with a clamp connection in a view from the front,
  • Figure 2 shows the clamp connection of FIG. 1 in a section along the line 11-11, on a larger scale
  • FIG. 3 shows the clamp connection in a view from above,
  • Figure 4 shows a cross section of the flange of the plastic water tank on a larger scale and
  • Figure 5 is a side view in the direction of arrow V in Figure 4 on a portion of the flange.

Die Figuren 1 bis 3 zeigen die Klemmverbindung eines Wärmetauschers insbesondere eines Kühlers für Kraftfahrzeuge in fertigem, d.h. geschlossenen Zustand. Es handelt sich um einen Kunststoffwasserkasten 1 und einen aus Metall bestehenden Rohrboden 2, die unter Zwischenlage einer elastischen Dichtung 3 flüssigkeits- und druckdicht miteinander verbunden sind. Beide Teile bilden den Sammelbehälter eines nicht vollständig dargestellten Wärmetauschers, bspw. eines Kühlers für Kraftfahrzeuge.Figures 1 to 3 show the clamp connection of a heat exchanger, in particular a radiator for motor vehicles in finished, i.e. closed state. It is a plastic water tank 1 and a tube sheet 2 made of metal, which are connected to one another with the interposition of an elastic seal 3 in a liquid-tight and pressure-tight manner. Both parts form the collecting container of a heat exchanger, which is not shown completely, for example a radiator for motor vehicles.

Die Dichtung 3 ist in einem U-förmigen Außenrand 6 des Rohrbodens 2 zusammen mit einem ebenfalls umlaufenden Flansch 4 des Kunststoffwasserkastens 1 aufgenommen. Der außen und oben liegende Teil des Außenrands 6 besteht abwechselnd aus verformten ersten Teilbereichen 7 und nicht verformten weiteren Bereichen 8. In geschlossenem Zustand der Klemmverbindung hat daher der verformbare Bereich 5 des Außenrands 6, wie in Figur 3 ersichtlich ist, eine Wellenform. Hierzu muß der verformte erste Teilbereich 7 des Rohrbodens 2 freigeschnitten sein. Im Ausführungsbeispiel erfolgt dies durch Langlöcher 10, deren über den Flansch 4 gebogene Unterkanten 9 wesentlichen Bestandteil der Klemmverbindung sind.The seal 3 is received in a U-shaped outer edge 6 of the tube sheet 2 together with a likewise circumferential flange 4 of the plastic water tank 1. The outer and upper part of the outer edge 6 alternately consists of deformed first partial regions 7 and non-deformed further regions 8. In the closed state of the clamp connection, the deformable region 5 therefore has Outer edge 6, as can be seen in Figure 3, a waveform. For this purpose, the deformed first section 7 of the tube sheet 2 must be cut free. In the exemplary embodiment, this takes place through elongated holes 10, the lower edges 9 of which are bent over the flange 4 and are an integral part of the clamp connection.

Zur Erzielung einer möglichst überall gleichen Wandstärke des Kunststoffwasserkastens 1 ist der Flansch 4 mit hochgezogenen Schließnocken 11 versehen, deren Außenkonturen 12 fluchtend zur Flanschaußenkontur 12' verlaufen und die auf ihrer Oberseite eine Schrägfläche 13 tragen. Der Schrägungswinkel 14 dieser Schrägflächen gegenüber der Dichtfläche 15 des Rohrbodens 2 beträgt etwa 10°.In order to achieve the same wall thickness of the plastic water tank 1 as possible, the flange 4 is provided with raised closing cams 11, the outer contours 12 of which are aligned with the flange outer contour 12 'and which have an inclined surface 13 on their upper side. The helix angle 14 of these inclined surfaces with respect to the sealing surface 15 of the tube sheet 2 is approximately 10 °.

Zwischen den einzelnen Schließnocken 11 sind höherreichende Rippenvorsprünge 16 vorgesehen, deren Außenkonturen 12" mit der Flanschaußenkontur 12' fluchten, so daß beim Einbiegen der ersten Teilbereiche 7 des verformbaren Randbereichs 5 die nicht verformten weiteren Teilbereiche 8 abgestützt werden und so eine unerwünschte Verformung verhindern.Between the individual locking cams 11, higher-reaching rib projections 16 are provided, the outer contours 12 '' of which are aligned with the flange outer contour 12 ', so that when the first partial regions 7 of the deformable edge region 5 are bent in, the undeformed further partial regions 8 are supported and thus prevent undesired deformation.

Die Herstellung der Klemmverbindung und auch deren evtl. späteres Lösen ist in der DE-OS-28 52 408 ausführlich beschrieben. Nachdem die Dichtung 3 in den Rohrboden 2 eingelegt worden ist, wird der Wasserkasten 1 gegen die Dichtung 3 gepresst, und Wasserkasten und Rohrboden werden auf ein Soll-Maß vorgespannt. Dieses Soll-Maß ist dann erreicht, wenn sich die Oberkante des Wasserkastenflansches 4 unterhalb der Oberkanten der Langlöcher 10 befindet. Danach erfolgt das Schließen der Verbindung durch ein Hereinbiegen der ersten Teilbereiche 7. Bei diesem Hereinbiegen der ersten Teilbereiche 7 erfolgt durch deren Unterkanten 9 nach einem Aufgleiten auf der Schrägfläche 13 schließlich ein gewisses Abschaben des Kunststoffs, wenn ein elastisches Nachgeben nicht mehr möglich ist. Maßabweichungen der Höhe der Schließnocken 11 gegenüber der Dichtfläche 15 bleiben daher, wenn diese nur ausreichend hoch sind, ohne Einfluß auf die Dichtheit der Klemmverbindung. Es können daher Kunststoffwasserkästen 1 mit relativ großen Fertigungstoleranzen, insbesondere auch der Flanschen 4 mit ihre Schließnocken 11, ohne Nachteile verwendet werden, so daß wesentlich weniger Ausschußteile ausgesondert werden müssen und trotzdem die Dichtheit der Wärmetauscher auch bei höherem Innendruck und höherer Temperatur gewährleistet ist.The production of the clamp connection and its possible later release is described in detail in DE-OS-28 52 408. After the seal 3 has been inserted into the tube sheet 2, the water tank 1 is pressed against the seal 3, and the water tank and tube sheet are prestressed to a desired dimension. This target dimension is achieved when the upper edge of the water tank flange 4 is below the upper edges of the elongated holes 10. The connection is then closed by bending the first partial areas 7 in. In this bending in of the first partial areas 7, the lower edges 9, after sliding on the inclined surface 13, finally scrape the plastic to a certain extent when elastic yielding is no longer possible. Dimensional deviations in the height of the closing cams 11 compared to the sealing surface 15 therefore remain, if they are only sufficiently high, without affecting the tightness of the clamping connection. Plastic water tanks 1 with relatively large manufacturing tolerances, in particular also the flanges 4 with their locking cams 11, can therefore be used without disadvantages, so that significantly fewer rejects have to be sorted out and the tightness of the heat exchangers is nevertheless ensured even at higher internal pressures and higher temperatures.

Claims (5)

1. A heat exchanger comprising a synthetic plastics water tank (1) provided with at least one flange (4) and a tube plate (2) carrying a deformable marginal zone (5), between which a resilient seal (3) is held under initial tension, the deformable marginal zone (5), prior to being deformed, extending parallel with the outer contours of the flange (12') and, after it has been made with a clamping joint via the flange (4) of the synthetic plastics water tank (1), it comprises substantially undulatingly shaped first partial zones (7) and non-deformed further partial zones (8) which extend parallel with the outer contours of the flange (12'), the first partial zones (7) deformed via the flange or flanges (4) of the synthetic plastics water tank (1) constituting a positive connection in which the bottom edge (9) of the deformed first partial zones (7) bear on the upper side or sides of the flange or flanges (4) under initial tension and in which, to facilitate deformation or shaping, the deformed first partial zones (7) are cut away parallel with and at a distance from an outer edge at the level of the top edge or edges of the flange or flanges characterised in that the upper side of the flange (4) or flanges (4) of the synthetic plastics water tank (1) have at least partially in the region of the deformed first partial zones (7) a sloping surface (13), this sloping surface or surfaces (13) falling away towards the outer contours of the flange (12'), the bottom edge (9) of the deformed first partial zones (7) being in each case deformed over this or these sloping surface (13) or surfaces.
2. A heat exchanger according to Claim 1, characterised in that during shaping of the first partial zones (7) of the deformable marginal zone (5), in each case a part of the sloping surface (13) of the flange (4) of the synthetic plastics water tank (1) has a portion shaved off by the bottom edge (9) of the deformed first partial zone (7).
3. A heat exchanger according to Claim 1 or 2, characterised in that the flange (4) of the synthetic plastics water tank (1) has shaped locking members (11) which support the sloping surfaces (13).
4. A heat exchanger according to Claim 3, characterised in that it is possible to provide between the locking members (11) higher projecting ribs (16) which protrude beyond the sloping surfaces (13), their outer contours (12") being aligned with the outer contours of the flange (12').
5. A heat exchanger according to Claim 1, characterised in that the angle of chamfer (14) of the sloping surfaces (13) is about 10° to the sealing surface (15) of the flange (4).
EP88112529A 1987-09-30 1988-08-02 Clamping assembly Expired - Lifetime EP0309683B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873732964 DE3732964A1 (en) 1987-09-30 1987-09-30 TERMINAL CONNECTION
DE3732964 1987-09-30

Publications (2)

Publication Number Publication Date
EP0309683A1 EP0309683A1 (en) 1989-04-05
EP0309683B1 true EP0309683B1 (en) 1991-01-02

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EP88112529A Expired - Lifetime EP0309683B1 (en) 1987-09-30 1988-08-02 Clamping assembly

Country Status (5)

Country Link
US (1) US4881595A (en)
EP (1) EP0309683B1 (en)
BR (1) BR8804974A (en)
DE (2) DE3732964A1 (en)
ES (1) ES2019680B3 (en)

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GB2138335B (en) * 1983-04-19 1986-05-14 Ford Motor Co An assembly of two parts
FR2556461B1 (en) * 1983-12-09 1988-08-26 Chausson Usines Sa PROCESS FOR CRIMPING A COLLECTOR PLATE OF A HEAT EXCHANGER ON A WATER BOX AND EXCHANGER OBTAINED BY THIS PROCESS
US4651815A (en) * 1985-06-19 1987-03-24 Modine Manufacturing Company Header plate-tank connection

Also Published As

Publication number Publication date
DE3861370D1 (en) 1991-02-07
US4881595A (en) 1989-11-21
EP0309683A1 (en) 1989-04-05
ES2019680B3 (en) 1991-07-01
BR8804974A (en) 1989-05-02
DE3732964A1 (en) 1989-04-13
DE3732964C2 (en) 1991-03-21

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