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DE19800191A1 - Flat radiators - Google Patents

Flat radiators

Info

Publication number
DE19800191A1
DE19800191A1 DE1998100191 DE19800191A DE19800191A1 DE 19800191 A1 DE19800191 A1 DE 19800191A1 DE 1998100191 DE1998100191 DE 1998100191 DE 19800191 A DE19800191 A DE 19800191A DE 19800191 A1 DE19800191 A1 DE 19800191A1
Authority
DE
Germany
Prior art keywords
plate
front plate
plates
welding
flat
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.)
Withdrawn
Application number
DE1998100191
Other languages
German (de)
Inventor
Jos Vaessen
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.)
BRUGMAN INTERNATIONAL B.V., TUBBERGEN, NL
Original Assignee
VASCO DILSEN NV
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
Application filed by VASCO DILSEN NV filed Critical VASCO DILSEN NV
Priority to DE1998100191 priority Critical patent/DE19800191A1/en
Priority to EP98117710A priority patent/EP0928941A3/en
Publication of DE19800191A1 publication Critical patent/DE19800191A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0308Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00Making other particular articles
    • B21D53/02Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/04Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
    • B21D53/045Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal by inflating partially united plates
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/12Elements constructed in the shape of a hollow panel, e.g. with channels
    • F28F3/14Elements constructed in the shape of a hollow panel, e.g. with channels by separating portions of a pair of joined sheets to form channels, e.g. by inflation

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Laser Beam Processing (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Die Erfindung betrifft einen Flachheizkörper aus zwei aneinanderliegenden Platten, die an den Rändern und im Abstand zum Rand an einzelnen Stellen durch Schweißen aneinander befestigt sind. Die vordere flache Platte weist eine größere Dicke auf als die hintere gewellte Platte. Die Verformung der hinteren Platte erfolgt durch Einbringen eines Fluids unter Druck zwischen beide Platten.The invention relates to a flat radiator from two adjacent plates, which are attached to one another at the edges and at a distance from the edge by welding. The front flat plate is thicker than the rear corrugated plate. The rear plate is deformed by introducing a fluid under pressure between the two plates.

Description

Die Erfindung betrifft einen Flachheizkörper aus zwei aneinanderliegenden Stahlplatten, die an den Rändern und im Abstand zum Rand an einzelnen Stellen durch Schweißen aneinander befestigt sind, wobei die vordere flache Platte eine größere Dicke aufweist als die hintere gewellte Platte.The invention relates to a flat radiator from two adjacent steel plates on the edges and at a distance from the edge at individual points by welding are attached to each other, the front flat Plate has a greater thickness than the rear one corrugated plate.

Es ist bekannt, Flachheizkörper aus zwei Platten aneinander zu schweißen, wobei beide Platten mit Wellungen vorgeformt sind. Die äußeren Ränder sind durch Rollnahtschweißung miteinander verbunden und die in der Fläche befindlichen Stellen sind punktgeschweißt. Wird für die vordere Seite eine flache Platte gewählt, so zeichnen sich die Schweißstellen besonders stark ab. Um dies zu verhindern, wurde versucht, die vordere Platte sehr dick zu wählen. Dies führt aber zu einer erheblichen Gewichtserhöhung. Ferner wurde durch Abschleifen der Vorderseite und anschließendem Lackieren versucht, die sichtbaren Spuren der Nähte zu beseitigen. Dies gelingt aber nur unvollständig. Schweißnähte und Schweißpunkte zeichnen sich nicht nur ab, ein zusätzlicher Nachteil ist, daß durch den Unterschied in Material und Form der vorderen und hinteren Platte, der Flachheizkörper dazu neigt, sich zu verziehen. Die Spannungen der Schweißnähte verhalten sich in der vorderen Platte anders als in der hinteren Platte. Ferner kann bei einer nicht ausreichend dicken Vorderplatte nicht verhindert werden, daß diese sich auch wellt.It is known flat radiators made of two plates to weld to each other, both plates with corrugations are preformed. The outer edges are through Roll seam welding joined together and that in the Spot areas are spot welded. Is for the front side chose a flat plate, so draw the welding spots become particularly sharp. To do this  To prevent it, the front plate was tried very thick to choose. But this leads to a considerable one Weight gain. Furthermore, by grinding the Front and then painting tried that remove visible traces of the seams. This succeeds but only incomplete. Welds and weld spots are not just emerging, an additional disadvantage is that the difference in material and shape of the front and rear plate, the flat radiator tends to warp. The tension of the welds behave differently in the front plate than in the rear plate. Furthermore, one may not be sufficient thick front panel cannot prevent this also curls.

Aufgabe der Erfindung ist es, einen Flachheizkörper der eingangs genannten Art so zu verbessern, daß bei nicht zu dicker Vorderplatte die Schweißungen an deren Vorderseite nicht sichtbar sind.The object of the invention is to provide a flat radiator to improve the type mentioned so that at not too thick front plate the welds on the front are not visible.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Verformung der hinteren Platte durch Einbringen eines Fluids unter Druck zwischen beide Platten erfolgt.This object is achieved in that the deformation of the rear plate by inserting a Fluids under pressure between the two plates.

Ein solcher Flachheizkörper hat eine völlig flache Vorderplatte, auf der Schweißnähte nicht zu sehen sind. Hierbei ist die Herstellung einfach und führt zu Flachheizkörpern mit verhältnismäßig geringem Gewicht.Such a flat radiator has a completely flat one Front plate on which welding seams cannot be seen. Here, the manufacture is simple and leads to Flat radiators with a relatively low weight.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen aufgeführt.Advantageous embodiments of the invention are in the Subclaims listed.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen An embodiment of the invention is in the Drawing shown and will be described in more detail below described. Show it  

Fig. 1 eine Seitenansicht eines Flachheizkörpers, Fig. 1 is a side view of a flat radiator,

Fig. 2 einen Schnitt nach A-A in Fig. 1, Fig. 2 shows a section according to AA in Fig. 1,

Fig. 3 einen Ausschnitt aus Fig. 2. Fig. 3 shows a detail from FIG. 2.

Zu Beginn sind sowohl die vordere 1 als auch die hintere Platte 2 völlig flach und werden durch Laserschweißen miteinander an allen Rändern sowie auch an Stellen über der Fläche verbunden. Die Schweißung 4 wird von der Seite der hinteren Platte 2 initiiert. Die Laserschweißung dringt völlig durch die Hinterplatte 2 und teilweise durch die Vorderplatte 1. Bei richtiger Wahl von Dicke und Material der Platten und durch Optimierung der Schweißparameter gibt es keine Abzeichnungen der Schweißungen an der Vorderseite der Platte.At the beginning, both the front 1 and the rear plate 2 are completely flat and are connected to one another at all edges as well as at locations above the surface by laser welding. The weld 4 is initiated from the rear plate 2 side. The laser welding penetrates completely through the rear plate 2 and partly through the front plate 1 . With the correct choice of the thickness and material of the plates and by optimizing the welding parameters, there are no marks on the welds on the front of the plate.

Die Wasserkanäle 5 werden durch Aufblasen des Zwischenraumes zwischen den Platten erhalten. Durch eine Anschlußöffnung wird ein Medium unter Hochdruck eingeführt und beide Platten gehen zwischen den Schweißnähten auseinander um hohle Wellen 3 zu bilden. Damit nicht die Vorderplatte 1, sondern nur die Hinterplatte 2 sich wellt, ist die Vorderplatte mindestens 1,8 mm dick und die Hinterplatte etwa 1 mm dick. Die Kanalhöhe beträgt hierbei <2 mm.The water channels 5 are obtained by inflating the space between the plates. A medium is introduced under high pressure through a connection opening and the two plates diverge between the weld seams to form hollow shafts 3 . So that not the front plate 1 , but only the rear plate 2 curls, the front plate is at least 1.8 mm thick and the rear plate is approximately 1 mm thick. The channel height is <2 mm.

Vorderplatte und Hinterplatte werden aus unterschiedlichen Materialien und/oder Materialdicke gewählt. Die Vorderplatte 1 besteht aus sehr hartem Material und die Hinterplatte 2 aus Tiefziehqualität.Front plate and rear plate are selected from different materials and / or material thickness. The front plate 1 consists of very hard material and the rear plate 2 of deep-drawing quality.

Die Vorderplatte ist sehr stabil und verformt sich nicht während des Aufblasens. Die Hinterplatte ist sehr flexibel und verformt sich während des Aufblasens leicht. Microlegierte Stahlarten sind von Vorteil. Die Vorderplatte besteht aus hochstarkem Stahl mit einer hohen Streckgrenze, die Hinterplatte aus Tiefziehqualität mit einer niedrigen Streckgrenze. Damit es keine Abzeichnung der Schweißnähte an der Vorderseite gibt, ist eine Mindestdicke der Vorderplatte erforderlich. Die Hinterplatte ist möglichst dünn, damit der Aufblasprozeß vereinfacht wird. Die Dicke der Vorderplatte ist mindestens 50% größer als die der Hinterplatte.The front plate is very stable and does not deform while inflating. The back plate is very  flexible and easily deforms during inflation. Micro-alloyed steel types are an advantage. The Front plate is made of high-strength steel with a high yield strength, the back plate out Thermoforming quality with a low yield strength. So that there is no marking of the weld seams on the Front there is a minimum thickness of the front panel required. The back plate is as thin as possible, so the inflation process is simplified. The thickness of the Front plate is at least 50% larger than that of the Backplate.

Das Verhältnis des Produkts der Streckgrenze der Vorderplatte mit der Dicke der Vorderplatte zu dem Produkt der Streckgrenze der Hinterplatte mit der Dicke der Hinterplatte ist <=3,3.The ratio of the product to the yield strength of the Front plate with the thickness of the front plate to that Product of the yield strength of the back plate with the thickness the rear plate is <= 3.3.

Es gilt somit: (Re(1)×d(1))/(Re(2)×d(2))<=3,3, wobei Re(1) und Re(2) die Streckgrenzen der Vorder- bzw. Hinterplatte und d(1) sowie d(2) die Dicken der Vorder- bzw. Hinterplatte sind.The following therefore applies: (Re (1) × d (1)) / (Re (2) × d (2)) <= 3.3, where Re (1) and Re (2) are the yield strengths of the front and Back plate and d (1) and d (2) the thicknesses of the Front or rear plate are.

An der Hinterplatte sind Rohrstutzen 6, 7 angeschweißt, durch die das Druckmedium angelegt wird und die später der Wasserführung dienen.Pipe sockets 6 , 7 are welded to the rear plate, through which the pressure medium is applied and which later serve to guide the water.

Während des Eindrückens des Fluids (insbesondere von Wasser) wird die hintere Platte 2 an den Schweißstellen 4 gegen die vordere Platte 1 gedrückt. Hierzu sind Stempel 8 vorgesehen, deren vordere Druckflächen in Größe und Form den Schweißstellen 4 entsprechen. Während dieses Arbeitsvorganges liegt die vordere Platte 1 mit ihrer Vorderseite auf einer ebenen festen Unterlage.While the fluid (in particular water) is being pressed in, the rear plate 2 is pressed against the front plate 1 at the welding points 4 . For this purpose, stamps 8 are provided, the front printing surfaces of which correspond in size and shape to the welding points 4 . During this process, the front plate 1 lies with its front side on a flat solid surface.

Claims (11)

1. Flachheizkörper aus zwei aneinanderliegenden Stahlplätten (1, 2), die an den Rändern und im Abstand zum Rand an einzelnen Stellen durch Schweißen aneinander befestigt sind, wobei die vordere flache Platte (1) eine größere Dicke aufweist als die hintere gewellte Platte (2) dadurch gekennzeichnet, daß die Verformung der hinteren Platte durch Einbringen eines Fluids unter Druck zwischen beide Platten erfolgt.1. Flat radiator made of two adjacent steel plates ( 1 , 2 ), which are attached to each other by welding at the edges and at a distance from the edge, the front flat plate ( 1 ) having a greater thickness than the rear corrugated plate ( 2 ) characterized in that the deformation of the rear plate takes place by introducing a fluid under pressure between the two plates. 2. Heizkörper nach Anspruch 1, dadurch gekennzeichnet, daß die Dicke der vorderen Platte (1) mindestens 50%, größer ist als die Dicke der hinteren Platte (2).2. Radiator according to claim 1, characterized in that the thickness of the front plate ( 1 ) is at least 50% greater than the thickness of the rear plate ( 2 ). 3. Heizkörper nach Anspruch 2, dadurch gekennzeichnet, daß die vordere Platte (1) mindestens 1,5 mm, insbesondere 1,8 bis 3 mm und die hintere Platte (2) mindestens 0,8 mm, insbesondere 1 mm dick ist.3. Radiator according to claim 2, characterized in that the front plate ( 1 ) is at least 1.5 mm, in particular 1.8 to 3 mm and the rear plate ( 2 ) is at least 0.8 mm, in particular 1 mm thick. 4. Heizkörper nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Schweißnähte und Schweißpunkte durch Laserschweißen erfolgen. 4. Radiator according to one of the previous ones Claims, characterized, that the welds and weld spots through Laser welding is done.   5. Heizkörper nach Anspruch 4, dadurch gekennzeichnet, daß das Schweißen von der hinteren Platte (2) aus erfolgt und die Schweißung die vordere Platte (1) nur teilweise durchdringt.5. Radiator according to claim 4, characterized in that the welding from the rear plate ( 2 ) takes place and the welding only partially penetrates the front plate ( 1 ). 6. Heizkörper mit einer flachen, sichtbaren Vorderplatte (1) und einer gewellten Hinterplatte (2), dadurch gekennzeichnet, daß beide Platten durch Durchschweißung (4) von der Hinterseite zu der Vorderplatte miteinander dort verbunden sind, wo die beiden Platten einander berühren und das Verhältnis des Produkts der Streckgrenze der Vorderplatte mit der Dicke der Vorderplatte zum Produkt der Streckgrenze der Hinterplatte (2) mit der Dicke der Hinterplatte <=3,3 ist.6. Radiator with a flat, visible front plate ( 1 ) and a corrugated rear plate ( 2 ), characterized in that both plates are connected by welding ( 4 ) from the rear to the front plate where the two plates touch each other and that Ratio of the product of the yield strength of the front plate with the thickness of the front plate to the product of the yield strength of the rear plate ( 2 ) with the thickness of the back plate is <= 3.3. 7. Heizkörper nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Hinterplatte mindestens 1 mm dick ist.7. Radiator according to one of the preceding claims, characterized in that the Back plate is at least 1 mm thick. 8. Heizkörper nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Vorderplatte mindestens 1,5 mm dick ist.8. Radiator according to one of the preceding claims, characterized in that the Front plate is at least 1.5 mm thick. 9. Verfahren zum Herstellen eines Flachheizkörpers nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß zwischen den Platten (1, 2) ein Fluid unter Druck eingepreßt wird und während des Eindrückens des Fluids und zumindest an den einzelnen Schweißstellen (4) die Platten (1, 2) aufeinander gedrückt werden.9. A method for producing a flat radiator according to one of the preceding claims, characterized in that a fluid is pressed in under pressure between the plates ( 1 , 2 ) and during the pressing in of the fluid and at least at the individual welding points ( 4 ), the plates ( 1 , 2 ) are pressed together. 10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß an den einzelnen Schweißstellen (4) während des Eindrückens vom Fluid die dünnere hintere Platte (2) gegen die dickere vordere Platte (1) gedrückt wird, während die Bereiche der hinteren Platte (2) zwischen den Schweißstellen (4) nach außen verformt werden.10. The method according to claim 9, characterized in that at the individual welds ( 4 ) during the impression of the fluid, the thinner rear plate ( 2 ) is pressed against the thicker front plate ( 1 ), while the areas of the rear plate ( 2 ) between the welds ( 4 ) are deformed outwards. 11. Verfahren nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß während des Eindrückens des Fluids die vordere Platte (1) auf einer ebenen Unterlage liegt.11. The method according to claim 9 or 10, characterized in that during the pressing in of the fluid, the front plate ( 1 ) lies on a flat surface.
DE1998100191 1998-01-07 1998-01-07 Flat radiators Withdrawn DE19800191A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1998100191 DE19800191A1 (en) 1998-01-07 1998-01-07 Flat radiators
EP98117710A EP0928941A3 (en) 1998-01-07 1998-09-18 Flat radiator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1998100191 DE19800191A1 (en) 1998-01-07 1998-01-07 Flat radiators

Publications (1)

Publication Number Publication Date
DE19800191A1 true DE19800191A1 (en) 1999-09-16

Family

ID=7854024

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1998100191 Withdrawn DE19800191A1 (en) 1998-01-07 1998-01-07 Flat radiators

Country Status (2)

Country Link
EP (1) EP0928941A3 (en)
DE (1) DE19800191A1 (en)

Families Citing this family (7)

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SE520673C2 (en) * 2001-12-17 2003-08-12 Alfa Laval Corp Ab Plate package, procedure for its manufacture, use of a plate package, and plate heat exchanger
DE102007055910A1 (en) * 2007-10-25 2009-04-30 Baumüller Nürnberg GmbH Cooling jacket, in particular for electrical machines, and production method therefor
DE102009025521A1 (en) 2009-06-19 2010-12-23 Kurt Preissler Tube heating element i.e. decorative bath heating element, has transverse pipes connected with collecting pipes, where connections of transverse pipes consist of sleeves that are sealed to outer side, plugged and frictionally clamped
DE102011105282A1 (en) * 2011-06-10 2012-12-13 Claas Selbstfahrende Erntemaschinen Gmbh Method and device for manufacturing multi-layered components
EP2863146A1 (en) * 2013-10-18 2015-04-22 Rodomach Speciaalmachines B.V. Method for producing an absorber for a solar collector, and a solar collector
US10727552B2 (en) * 2015-11-04 2020-07-28 Ford Global Technologies, Llc Heat exchanger plate for electrified vehicle battery packs
FR3108967B1 (en) 2020-04-02 2022-12-23 Ideal Therm Heating-cooling walls and ceilings

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US3004329A (en) * 1956-08-23 1961-10-17 Rudy Mfg Company Heat exchanger and method of construction
DE2604879A1 (en) * 1976-02-07 1977-08-11 Gerhard & Rauh Panel type cooling and heating elements - made from plates joined at edges and expanded by fluid pressure
DE3004597A1 (en) * 1980-02-08 1981-08-13 Gerhard & Rauh, 8413 Regenstauf Air-conditioning body prodn. method - uses medium under pressure to distort outer plates outwards where not welded to inner plates
DE3042602A1 (en) * 1980-11-12 1982-06-24 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Heat exchange panel mfd. from copper block - includes bores with stainless tubes inserted, then rolled out and tubes inflated
DE3926048A1 (en) * 1989-08-07 1991-02-14 Kabelmetal Ag Method of producing embedded heat exchanger panels - has panel rolled from copper block with through holes followed by inflation with compressed air
DE4426097A1 (en) * 1994-07-22 1996-01-25 Kloeckner Stahl Gmbh Process for the production of hollow body structures from sheet metal

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Publication number Priority date Publication date Assignee Title
DD59537A (en) *
US2882588A (en) * 1954-03-10 1959-04-21 Metal Specialty Company Simultaneous pressure welding and pressure forming
US3004329A (en) * 1956-08-23 1961-10-17 Rudy Mfg Company Heat exchanger and method of construction
DE2604879A1 (en) * 1976-02-07 1977-08-11 Gerhard & Rauh Panel type cooling and heating elements - made from plates joined at edges and expanded by fluid pressure
DE3004597A1 (en) * 1980-02-08 1981-08-13 Gerhard & Rauh, 8413 Regenstauf Air-conditioning body prodn. method - uses medium under pressure to distort outer plates outwards where not welded to inner plates
DE3042602A1 (en) * 1980-11-12 1982-06-24 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Heat exchange panel mfd. from copper block - includes bores with stainless tubes inserted, then rolled out and tubes inflated
DE3926048A1 (en) * 1989-08-07 1991-02-14 Kabelmetal Ag Method of producing embedded heat exchanger panels - has panel rolled from copper block with through holes followed by inflation with compressed air
DE4426097A1 (en) * 1994-07-22 1996-01-25 Kloeckner Stahl Gmbh Process for the production of hollow body structures from sheet metal

Also Published As

Publication number Publication date
EP0928941A2 (en) 1999-07-14
EP0928941A3 (en) 1999-12-29

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Owner name: BRUGMAN INTERNATIONAL B.V., TUBBERGEN, NL

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