EP2349602B1 - Procédé de formage de collecteurs d'échangeurs thermiques en aluminium - Google Patents

Procédé de formage de collecteurs d'échangeurs thermiques en aluminium Download PDF

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Publication number
EP2349602B1
EP2349602B1 EP09783331A EP09783331A EP2349602B1 EP 2349602 B1 EP2349602 B1 EP 2349602B1 EP 09783331 A EP09783331 A EP 09783331A EP 09783331 A EP09783331 A EP 09783331A EP 2349602 B1 EP2349602 B1 EP 2349602B1
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EP
European Patent Office
Prior art keywords
tube
header tank
heat exchanger
producing
forming
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Not-in-force
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EP09783331A
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German (de)
English (en)
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EP2349602A1 (fr
Inventor
Richard WESTERGÅRD
Björn OLSSON
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Granges Sweden AB
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Sapa Heat Transfer AB
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Priority to PL09783331T priority Critical patent/PL2349602T3/pl
Publication of EP2349602A1 publication Critical patent/EP2349602A1/fr
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Classifications

    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/049—Deforming bodies having a closed end
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/053—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure characterised by the material of the blanks
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/10—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes made by hydroforming
    • 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

Definitions

  • This invention relates to a method for producing a header tank, also called manifold tank, for brazed automotive or stationary aluminium heat exchangers, with almost arbitrary tank shapes.
  • Heat exchangers have, almost by default, a rectangular shape which restricts the automotive engineer concerning suitable locations for heat exchanger assembly into the car. Much of the restrictions on heat exchanger geometry are set by the economical feasibility of producing header plates and tanks to make such irregularly or custom shaped heat exchangers; such headers and tanks give too expensive heat exchangers with present production methods.
  • the increasing amount of underhood safety, comfort and performance components makes the front end of the vehicle increasingly heavier than the rear end which is undesirable.
  • heat exchangers like CAC, condensers, radiators and EGR coolers need to be positioned near the extreme front of the vehicle to facilitate sufficient heat exchange performance.
  • the present invention facilitates weight reduction of these components while reducing the cost and increasing the geometrical flexibility for packing without sacrificing performance.
  • the most commonly used production method for heat exchanger header tanks is to provide a flat rolled brazing sheet and forming it such that a header with tabs for crimping a plastic tank, slots for inserting flow tubes used for the circulation of cooling fluid and the final shape of the formed header is produced.
  • This is normally done by cutting a flat rolled sheet to the correct dimension, punching the sides to make a rectangular shaped edge of the sheet (for the tabs), deep drawing the piece of sheet to form a header plate and finally punching the slots into which the flow tube/fin package is inserted.
  • the normal brazing procedure commences. After brazing the cladding on the header surfaces has melted and flowed to the header tube joint to make a fillet with the correct size and shape. Thereafter the tank is crimped onto place.
  • the tank is commonly made of polymer materials in the case of radiators and heaters and for CAC it is usually made of aluminium.
  • Another technique previously used for forming header tanks is hydroforming.
  • EP 0 930 109 A2 discloses a hydroforming process for forming a component from an aluminium tubular blank of a deformable metal. The process comprises placing the blank in a die and sealing opposed ends of the blank, heating the blank to a deformation temperature, supplying gas at a predetermined pressure to the interior of the sealed tubular blank to cause deformation of the blank by drawing/stretching of the metal.
  • the manufacture of plastic tanks by injection moulding is a comparatively slow and costly procedure which requires large investments in machinery, tooling and control.
  • the tank is a multi-functional part of the heat exchanger and is also made with fixtures and easy-to-access assembly locations for e.g. in-tank oil coolers and sensory equipment.
  • plastic materials are considerably less stiff as compared to aluminium the wall thickness of the tank is thick, and the tank is made with integrated external stiffening frame-works to achieve sufficiently large torsional stiffness.
  • the tank thus becomes heavy despite being produced using a material with low density.
  • the tanks are nowadays usually made of aluminium. Most often such tanks are made using die casting technology which commonly restricts the tank wall thickness in the range above 1.5 mm, which adds weight to the heat exchanger. Also, cast aluminium is not easy to crimp onto the header and the usual joining method is melt welding by means of MIG or TIG. This type of tank and joining method normally gives a strong assembly. However, the welding is expensive, time consuming and adds a significant weight to the heat exchanger, particularly since the tank is made to have a very large thickness where the welding should take place and also the header plate needs to be thick to accommodate a successful weld joint.
  • the present invention fulfills this need by providing a method according to the features of claim 1.
  • header tanks which can be brazed and which can be formed in complicated shapes. According to the present invention a method is provided for the manufacture of such header tanks, by means of the steps as set out in the appended claims.
  • Elongations to fracture exceeding 20% are invariably needed for a successful high quality forming to take place.
  • the core ingot of the clad brazing sheet material is in the state of the art processes exposed to a high temperature homogenisation treatment.
  • the homogenisation treatment gives a microstructure that after hot and cold rolling and anneal, if correctly performed, increases formability of the alloy strip.
  • most of the manganese present in the alloy is precipitated to form large dispersoid particles, whereby some of the strength potential supplied by manganese in solid solution is lost.
  • the corrosion resistance of the AA3XXX alloys may also be negatively affected by the homogenisation treatment.
  • Homogenisation and anneal also incurs additional cost to the material as compared to only pre-heating before hot rolling. Therefore it is desired to avoid homogenisation and annealing for alloys which are intended for use as header tanks in heat exchangers.
  • the material is supplied in the fully soft O-temper or sometimes in the H112 temper, i.e. an annealed condition.
  • This operation also adds to the cost of the heat exchanger material.
  • the alloy of the tube need not be homogenised, which allows efficient forming of non-homogenised aluminium alloy tubes. Further, the tube blank need not be annealed before forming, which makes the method even more cost efficient.
  • the present invention provides a method for producing a heat exchanger header tank comprising the steps of providing a tube having a core made from a AA3XXX-aluminium alloy; optionally pre-heating the tube; inserting the tube into a forming tool having a forming cavity with the shape of the final header tank; plugging the ends of the tube; heating the tube to the forming temperature if the tube has not been sufficiently pre-heated and internally pressurising the tube by the use of a gas so as to make it conform to the shape of the tool cavity, thus obtaining the final header tank; removing the header tank from the tool; and cooling the header tank.
  • This method allows an efficient production of header tanks made of AA3XXX aluminium alloy.
  • a non-homogenised AA3XXX alloy header tank produced according to the method of the present invention will have higher strength and improved corrosion resistance as compared to a deep drawn header tank made from the corresponding but homogenised AA3XXX alloy.
  • the tube core may have at least one cladding made from an aluminium alloy, in order to enhance brazeability. Slots for tubes or connections may be made in the shaped header tank subsequent to forming, in order to facilitate the manufacture of a heat exchanger.
  • the gas pressure used during forming may preferably be higher than 85 bar, in order to obtain an efficient forming of the tube against the forming cavity of the tool.
  • an axial pressure can be applied to the tube ends during forming thereof, in order to feed in material into the forming cavity during forming.
  • connections, threads or anchors can be formed on the end of the tube during forming thereof, to make the assembly of the heat exchanger easier.
  • Pressures above 200 bar may be needed depending on the shape of the tank and the thickness of the aluminium blank.
  • the tube from which the header tank is formed can be made from a rolled aluminium alloy blank welded to produce the tube. Thereby, the tube can be effectively provided. It is particularly advantageous to produce the tube from a rolled braze clad aluminium blank, since this is an efficient method of obtaining a braze clad tube. Braze clad tubes is very costly and extremely difficult to extrude.
  • the tube can be made from an extruded aluminium alloy, which is advantageous in some situations, in particular when no braze clad is provided on the tube.
  • the present invention further provides a preferred method for producing a heat exchanger, where the header tank is connected to a plurality of tubes and corrugated fins inserted between the tubes, followed by brazing of the fins to the tubes.
  • the hot metal gas forming allows the construction of aluminium header tanks of almost arbitrary shape made from AA3XXX alloys for heat exchangers.
  • header tanks for such heat exchangers are of low weight and can be optimised at a low cost compared to competing technology.
  • the elimination of plastic tanks makes material recovery easier.
  • the cross-section geometry of the tank can be varied within greater limits than with competing aluminium forming techniques, e.g. hydroforming or deep drawing.
  • Tensile tests made have shown that the formability of the header tank material increases significantly when the temperature at forming is increased, which means that the elongation to rupture can increase to over 100% when the temperature is increased to 400 °C, as compared with 20-30% at room temperature.
  • header tank is not constrained to make rectangular heat exchangers - irregular shapes are equally possible.
  • non-rectangular heat exchangers can be formed with a great flexibility as concerns the shape.
  • header tanks made with the method according to the present invention give a very high material yield, which is higher than the deep drawing or hydroforming techniques that are used today.
  • the header tanks facilitate economic production of heat exchangers that allow automotive engineers to pack more efficiently in the underhood compartment and at the same time opens possibilities to optimise heat exchange performance.
  • Header tanks made with the method according to the present invention can be made using materials that have higher strengths and higher corrosion performance, and the materials can be made according to a more environmentally friendly process route with fewer thermomechanical operations compared with competing technology.
  • the header tanks are produced by the process steps: i) brazing sheet production according to standard industry practices, ii) welding and possibly bending of tubes made from the brazing sheet, iii) hot metal gas forming of the tube in a tool which interior is designed according to the header tank product, iv) making slots for flow tubes and connections to the remainder of the heat exchanger system.
  • a brazing sheet consists of a core material that may be clad on one or both sides of the sheet surfaces.
  • the core material is chosen in the AA3XXX-series with melting temperatures exceeding 610°C, e.g. AA3003 or AA3005.
  • the braze cladding is normally chosen from the low melting hypoeutectic AA4XXX alloys, e.g. AA4343 and AA4045.
  • either or both sides can be clad with more than one material, a so-called multi-clad.
  • the cladding may be made of a material that is electrochemically balanced such that it is sacrificial to the core in corrosive environments.
  • the core material can be clad on one or both sides or no side at all.
  • the claddings may be single layer or double layer on one or both sides, the cladding can consists of a low melting braze or a sacrificial cladding or a cladding that is present in between the braze and the core to reduce braze-core interaction by e.g. diffusion.
  • the claddings are applied to the core by means of hot rolling followed by cold rolling and necessary heat treatments to achieve the correct intermediate and final tempers before slitting to the correct width.
  • the products made from the brazing sheet can then be brazed either using controlled atmosphere brazing (CAB) or vacuum brazing.
  • CAB controlled atmosphere brazing
  • 6XXX or 5XXX alloys are commonly used for products that are not intended for brazing (with CAB). These alloys are used for products where high strength is desired, such as e.g. construction details. 6XXX or 5XXX alloys receive their strength through the high content of Mg. CAB-brazing of these alloys is difficult due to a reaction between magnesium and the flux.
  • AA6063 a heat treatable alloy with an Mg content of about 0.7 wt-%, is not considered brazeable in the CAB process.
  • 3XXX alloys with a maximum of about 0.4% Mg may be brazed in CAB.
  • the difficulties of forming 3XXX alloys into the desired shape are overcome.
  • the method of the present invention allows the choice of 3XXX alloys for the header tanks, which results in that the header tank can be CAB brazed in a later stage.
  • one of the intermediate products in the production of a header tank is a tube.
  • the actual welding method may be induction welding, MIG, TIG, friction stir welding or any other suitable welding method.
  • the tube may have a circular, elliptic, square, rectangular, triangular or any other suitable symmetric or asymmetric cross-section geometry.
  • the tube can be made either with a constant or varying cross-section geometry and dimension along its length, depending on customer demands. It is wise, though not always necessary, to choose a cross-section to avoid excessive deformation requirements in subsequent processing. Also, if the tube is welded such that the cross-section geometry is constant along the length the material yield is theoretically 100% in the welding operation which is followed by a cut-to length operation.
  • Heat exchangers used within the automotive industry typically have a rectangular shape. This has resulted in a limitation concerning suitable positions for the heat exchanger assembly in the car. In some situations a circular, bent or step-shaped, or even irregularly shaped heat exchanger would be the ideal for assembly into the available underhood space, or using the available underhood space in the best way to optimise heat exchange performance.
  • heat exchanger which has a shape that is adapted to the space available in the car, or is adapted to a desired flow pattern.
  • Such heat exchanger would need a tailored header tank.
  • the method of the present invention allows for forming of header tanks of any desired shape in three dimensions. Conceivable shapes are for example ring-shape, S-shape, L-shape or C-shape.
  • the header tank may be curved or bent along its length axis and/or across its length axis.
  • the flow tubes are to be attached in a line along the length of header tank, which means that the entire heat exchanger will assume a cross-sectional shape which corresponds to the shape of the header tank.
  • a non-rectangular e.g. a circular shaped heat exchanger for reasons of underhood packing, heat exchange performance or simply customising a product.
  • This need can then be satisfied by bending the welded tube made from clad brazing sheet to a form with suitable radius of curvature.
  • an S-, trapezoid- or irregularly shaped header tank may be needed.
  • the tube When a bent or curved tank is to be produced the tube may be bent to a suitable pre-shape before hot gas forming.
  • the bending of the tube may take place using any bending method that is suited for the particular shape to be produced.
  • the bending can be undertaken at ambient or elevated temperature to fit the needs for the particular shape required for the final header tank.
  • the tube is optionally heated by any suitable means, e.g. furnace, flame or induction or using a heated tool.
  • Induction and flame heating have the advantages that the thermal input can be localised to selected regions of the tube. This can be employed as a means to vary the mechanical properties on selected regions as it is known that material temperature is decisive in affecting properties like yield stress, ultimate tensile stress, elongation to fracture and formability.
  • the desired forming temperature may vary between 250°C and 550°C.
  • the tube is placed into a forming tool, made such that the internal surfaces of the tool correspond to the external geometry of the final header tank.
  • the tool can be cold (e.g. room temperature), in which case the tube must be pre-heated, but the tool is preferably heated to a suitable elevated temperature, either before or during forming.
  • the choice of tool and tube temperatures is determined by the mechanical and formability properties of the tube material and the final geometry of the header tank.
  • the tube ends are plugged and the tube is connected to a high pressure gas system.
  • a high pressure gas system During forming the tube is at a temperature of between 250°C and 550°C. This forming temperature can be achieved by pre-heating the tube to this temperature before inserting it into the forming cavity, or by having pre-heated the tool before inserting the tube into it, or by heating the tool during forming, e.g. by induction.
  • the pressure of the gas is increased inside the tube, which responds to the increasing pressure by deforming. The pressure is increased until the tube has conformed to the surfaces of the tool.
  • the actual final pressure and the gas pressure increase rate are determined by, among other things, the mechanical properties of the tube alloy at the temperature, tube wall thickness, final header tank shape and the amount of deformation needed for the tube to attain the desired shape.
  • the high pressure gas can be vented and the shaped product removed from the tool.
  • the gas can be air, nitrogen, inert gases or any other suitable gaseous substance.
  • the pressure during forming is quite low, much lower than those employed in e.g. hydroforming. An approximate upper limit of 250 bar should be sufficient to form the aluminium alloy material for heat exchanger purposes to the desired shape. Due to the limited pressure during forming of the tank, the forming tool used in the production of header tanks may be made of other materials than is used for tools used in the previously used forming methods. After the forming has been finalised, the formed product can be cooled either in air or quenched in water.
  • a release agent or high temperature lubricant may be applied either on the tube or on the tool surfaces and may be applied before each new tube to be formed or in the form of a coating that does not need to be replenished either than on rare occurrences.
  • the holes and slots may also be milled or drilled or formed by the use any other suitable techniques on the hot gas formed product. Alternatively, the holes may be punched during the later stages of the hot gas forming process, when the final shape of the tube has been attained and when the hot gas pressure can provide support from the inside of the tube to prevent a collapse as a result of the punching action.
  • Fasteners may be attached to the hot gas formed product by any suitable means, e.g. riveting, brazing, welding or gluing.
  • the choice of fastening method depends on customer needs, allowed costs, performance and whether the fastening should take place before or after brazing.
  • the header tank can be formed with indentations for facilitating the forming of slots in the header tank, an example of that is shown in Fig. 2 .
  • At least one of the plugs at the end of the tube has an opening attached to the pressure gas system.
  • the opening Before the tank is used in a heat exchanger application the opening must be closed. This can be made in several ways. Firstly, an open tube end can be plugged by attaching the inlet and outlet connections for the heat exchange medium, whether it is liquid or gaseous. Secondly, it can be closed by means of a seal that can be brazed, welded or glued in this position or attached by any other suitable means. Alternatively, the end can be squeezed shut and the remaining gaps and crevices filled with a suitable metallic or polymeric filler to ensure a leak free closure. The application of such sealants is made using any suitable method.
  • An aluminium sheet of 3 mm thickness form alloy AA3003 clad with AA4343 is welded to form a tube of 40 mm diameter.
  • the tube is pre-bent to the shape according to figure Y, and put into a tool preheated to 500 °C of a similar shape.
  • the tool has been lubricated with a solid lubricant capable of withstanding the forming temperature without decomposition.
  • the tube ends are plugged and a force applied by hydraulic cylinders to avoid the two tool parts from separating.
  • a gas with is applied to the inside of the tube through one of the plugs and the pressure increased from 0 to 200 bar. The pressure is released after a few seconds at maximum pressure and the formed tube is removed from the tool and cooled by spraying water onto it. Slots are punched where connections are required.
  • the tube now has the final form of the header tank with preformed slots and bulges.
  • Heat exchanger fins and flow tubes may now be assembled with the tank and brazed to form a heat exchanger.

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

Claims (11)

  1. Procédé pour fabriquer un réservoir collecteur d'échangeur thermique, comprenant les étapes de :
    a) fourniture d'un tube possédant une âme faite d'un alliage d'aluminium AA3XXX ;
    b) préchauffage facultatif du tube ;
    c) insertion du tube dans un outil de formage possédant une cavité de formage avec la forme du réservoir collecteur final ;
    d) obturation des extrémités du tube ;
    e) chauffage du tube jusqu'à la température de formage si le tube n'a pas été suffisamment préchauffé et mise sous pression interne du tube par l'utilisation d'un gaz pour qu'il se conforme à la forme de la cavité d'outil, obtenant ainsi le réservoir collecteur final ;
    f) dépose du réservoir collecteur à partir de l'outil ;
    g) refroidissement du réservoir collecteur.
  2. Procédé pour fabriquer un réservoir collecteur d'échangeur thermique selon la revendication 1, dans lequel le matériau utilisé pour le tube n'a pas été homogénéisé.
  3. Procédé pour fabriquer un réservoir collecteur d'échangeur thermique selon la revendication 1 ou 2, dans lequel le tube n'a pas été recuit.
  4. Procédé pour fabriquer un réservoir collecteur d'échangeur thermique selon la revendication 2, dans lequel l'âme de tube comporte au moins un gainage fait à partir d'un alliage d'aluminium.
  5. Procédé pour fabriquer un réservoir collecteur d'échangeur thermique selon une quelconque des revendications précédentes, où des fentes pour des tubes ou raccords sont réalisées dans le réservoir collecteur mis en forme, au cours du formage, ou après le formage.
  6. Procédé pour fabriquer un réservoir collecteur d'échangeur thermique selon une quelconque des revendications précédentes, dans lequel la pression de gaz utilisée est supérieure à 85 bars.
  7. Procédé pour fabriquer un réservoir collecteur d'échangeur thermique selon une quelconque des revendications précédentes, dans lequel une pression axiale est appliquée sur les extrémités du tube au cours du formage de celui-ci.
  8. Procédé pour fabriquer un réservoir collecteur d'échangeur thermique selon une quelconque des revendications précédentes, dans lequel des filets ou ancrages sont formés sur l'extrémité du tube au cours du formage de celui-ci.
  9. Procédé pour fabriquer un réservoir collecteur d'échangeur thermique selon une quelconque des revendications précédentes, dans lequel un tube fait à partir d'une ébauche soudée est fourni dans l'étape a).
  10. Procédé pour fabriquer un réservoir collecteur d'échangeur thermique selon une quelconque des revendications précédentes, l'échangeur thermique étant de forme non rectangulaire.
  11. Procédé pour fabriquer un échangeur thermique, comprenant les étapes de :
    fabrication d'un réservoir collecteur au moyen du procédé selon les revendications 1 à 10;
    fourniture d'ouvertures pour des tubes d'écoulement dans le réservoir collecteur ;
    raccordement d'une pluralité de tubes d'écoulement au réservoir collecteur aux ouvertures ;
    insertion d'ailettes entre les tubes d'écoulement ;
    brasage des ailettes aux tubes d'écoulement.
EP09783331A 2008-10-08 2009-09-23 Procédé de formage de collecteurs d'échangeurs thermiques en aluminium Not-in-force EP2349602B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09783331T PL2349602T3 (pl) 2008-10-08 2009-09-23 Sposób wytwarzania kolektorów aluminiowych wymienników ciepła

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0802120A SE533223C2 (sv) 2008-10-08 2008-10-08 Metod för formning av header-tank tillverkad i aluminium
PCT/EP2009/062326 WO2010040642A1 (fr) 2008-10-08 2009-09-23 Procédé de formage de collecteurs d’échangeurs thermiques en aluminium

Publications (2)

Publication Number Publication Date
EP2349602A1 EP2349602A1 (fr) 2011-08-03
EP2349602B1 true EP2349602B1 (fr) 2012-11-07

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JP (1) JP2012505080A (fr)
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BR (1) BRPI0920023A2 (fr)
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PL2852494T3 (pl) 2012-05-23 2022-10-17 Gränges Finspång AB Ultra odporny na ugięcie oraz topnienie materiał żeber o bardzo dużej wytrzymałości
FR3018213B1 (fr) 2014-03-06 2016-10-21 Constellium France Tole de brasage a placages multiples
DE112014006624B4 (de) * 2014-04-30 2022-02-10 Ford Global Technologies, Llc Verfahren für das formen eines fahrzeuglängsträgers aus aluminium
JP6406614B2 (ja) * 2014-09-26 2018-10-17 株式会社ノーリツ 熱交換器のヘッダおよびこれを備えた熱交換器
CN104525675B (zh) * 2014-12-08 2017-03-22 无锡朗贤汽车组件研发中心有限公司 硼钢钢管的气胀热成形工艺
CN106999999A (zh) 2014-12-22 2017-08-01 诺维尔里斯公司 用于热交换器的包覆片材
RU2616684C2 (ru) * 2015-09-16 2017-04-18 Федеральное государственное автономное образовательное учреждение высшего образования "Белгородский государственный национальный исследовательский университет" (НИУ "БелГУ") Способ получения сварных конструкций алюминиевого сплава с высокой вязкостью разрушения
JP6545364B2 (ja) * 2016-04-01 2019-07-17 三菱電機株式会社 配管及びその配管を備えた熱交換器
TWI629118B (zh) * 2016-06-02 2018-07-11 中國鋼鐵股份有限公司 鋁罐用料之製造方法
CN109689241B (zh) * 2016-07-11 2021-12-21 萨帕公司 热金属气体成型的车顶纵梁及其制造方法
CN107866458B (zh) * 2017-11-06 2020-04-10 北京航星机器制造有限公司 一种变摩擦系数实现高温胀形自补料的成形方法
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CN110560507B (zh) * 2019-10-21 2021-01-26 大连理工大学 一种大直径异形截面薄壁管件的成形方法
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CN102202812A (zh) 2011-09-28
EA022670B1 (ru) 2016-02-29
SE0802120A1 (sv) 2010-04-09
TW201028229A (en) 2010-08-01
MX2011003224A (es) 2011-04-21
PL2349602T3 (pl) 2013-04-30
US20110240277A1 (en) 2011-10-06
CA2738747A1 (fr) 2010-04-15
TWI516319B (zh) 2016-01-11
EP2349602A1 (fr) 2011-08-03
JP2012505080A (ja) 2012-03-01
WO2010040642A1 (fr) 2010-04-15
ES2400074T3 (es) 2013-04-05
EA201170542A1 (ru) 2011-10-31
SE533223C2 (sv) 2010-07-27
BRPI0920023A2 (pt) 2016-07-26
DK2349602T3 (da) 2012-12-10
ZA201101793B (en) 2013-08-28
KR20110069843A (ko) 2011-06-23

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