WO2020152168A1 - Extrusion à orifices multiples de type en bande (web-mpe) - Google Patents

Extrusion à orifices multiples de type en bande (web-mpe) Download PDF

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Publication number
WO2020152168A1
WO2020152168A1 PCT/EP2020/051413 EP2020051413W WO2020152168A1 WO 2020152168 A1 WO2020152168 A1 WO 2020152168A1 EP 2020051413 W EP2020051413 W EP 2020051413W WO 2020152168 A1 WO2020152168 A1 WO 2020152168A1
Authority
WO
WIPO (PCT)
Prior art keywords
web
ports
mpe
end portion
tubing
Prior art date
Application number
PCT/EP2020/051413
Other languages
English (en)
Inventor
Bjørn VESTERGAARD
Ulrik Jessen
Ole Clausen
Original Assignee
Hydro Extruded Solutions As
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 Hydro Extruded Solutions As filed Critical Hydro Extruded Solutions As
Publication of WO2020152168A1 publication Critical patent/WO2020152168A1/fr

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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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/085—Making tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-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
    • F28D1/02—Heat-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
    • F28D1/04—Heat-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 tubular conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/025—Tubular elements of cross-section which is non-circular with variable shape, e.g. with modified tube ends, with different geometrical features
    • 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
    • F28F9/04—Arrangements for sealing elements into header boxes or 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/165—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using additional preformed parts, e.g. sleeves, gaskets
    • 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
    • F28F2009/0285—Other particular headers or end plates
    • F28F2009/0297—Side headers, e.g. for radiators having conduits laterally connected to common header
    • 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
    • F28F2255/16—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes extruded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2260/00—Heat exchangers or heat exchange elements having special size, e.g. microstructures
    • F28F2260/02—Heat exchangers or heat exchange elements having special size, e.g. microstructures having microchannels

Definitions

  • the present invention relates to the design of the interface of a web based Multi Port Extrusion (web-MPE) tubing to a header, and pertains to a web-MPE tubing, a method for producing it, a heat exchanger, and a method for producing a heat exchanger.
  • web-MPE Multi Port Extrusion
  • Micro channel or micro port heat exchangers based on multiport extruded profiles (MPE) of aluminium or aluminium alloys are known where the inlets and outlets of the heat exchangers are provided with headers or manifolds to distribute, respectively collect the refrigerant flowing through the multiport extrusions.
  • MPE multiport extruded profiles
  • WO2014/137217A1 it is disclosed a heat exchanger composed of one or more-multi channel or multi-port extruded profiles (web-MPE), where individual ports are connected to corresponding holes in the headers.
  • WO2016/083457A1 there is disclosed a Multi Port Extrusion tubing (MPE tubing) made from a Multi Port Extrusion, where said MPE is a web-like extrusion.
  • MPE tubing Multi Port Extrusion tubing
  • a joint between one end of the MPE tubing and a header is present, and the ports appear to be pushed together in a bundle where all ports communicate with one opening.
  • a disadvantage of this solution is that it is difficult to braze or solder successfully all mating parts, and leaks can arise between the ports where they are attached to the header.
  • the present invention relates to a Multi Port Extrusion tubing (MPE tubing) made from a Multi Port Extrusion (MPE), said MPE being a web like extrusion (web-MPE) with two or more individual ports interlinked with webs, said webs having a thickness, which is less than the port diameter of the individual ports. More specifically, the invention relates to the joint between at least one end of such MPE tubing and a corresponding header where the MPE tubing’s end has an adaptive interface with an opening of the header.
  • MPE tubing Multi Port Extrusion tubing
  • web-MPE web like extrusion
  • a web based Multi Port Extrusion tubing comprising two or more individual ports interlinked with web having a thickness less than the port diameter of the individual ports, the web-MPE tubing having an end portion adapted to be joined with a header comprised in a heat exchanger, where the end portion of the web-MPE tubing is adapted to an opening in a wall of the header, by being shaped to be complementary to the shape of the opening, so that the web- MPE tubing end portion is adapted to fit into the opening of the header.
  • the end part of the web-MPE tubing may have been processed in a manner that the webs between individual ports have been removed in the region of the web-MPE tubing’s end portion. Further, the ports may have been processed and brought in a parallel alignment with each other, so that the ports in the end portion are in parallel relationship to each other, and so that that the ports have been aligned with each other via adjacent sides.
  • the ports may preferably be fixed side by side i.e. adjacent to each other by appropriate means, such that adjacent ports in the end portion have been fixed to each other, preferably by welding, e.g. friction welding, laser welding; gluing: or mechanical means.
  • the mechanical fixation can be obtained by mounting of a flat band, foil or wire around the ports in the end portion. By this a predictable geometry of the bundle of ports can be secured and be able to match an opening in a header with narrow tolerance.
  • the fixing of the ports to each other can be made permanent or temporary.
  • the mechanical fixing element in the form of a band, foil or wire can be made from a brazing filler material, to facilitate joining of the web-MPE tubing to a header.
  • the length of the port ends of the end portion can be processed to be of equal length.
  • the opening of the header can be pre-processed by appropriate machining techniques to match the geometry of the processed end portion of the web-MPE tubing.
  • the present invention further relates to a method for producing a web based Multi Port Extrusion tubing (web-MPE tubing) adapted to be joined with a header comprised in a heat exchanger, the web-MPE tubing comprising two or more individual ports interlinked by web having a thickness less than the port diameter of the individual ports, the method comprising the step of adapting an end portion of the web-MPE tubing to fit into an opening in a wall of the header.
  • the step of adapting the end portion of the web-MPE tubing may involve removing the web between the ports in the end portion, followed by pushing adjacent ports together by opposing forces.
  • the method may further comprise fixing the ports to each other via their adjacent sides.
  • the ports in the end portion can be fixed to each other metallurgically or mechanically.
  • the web between the ports in the end portion can suitably be removed by a tool, which creates friction energy removing the webs, and which heats and removes oxide layers of the ports, and wherein the ports are brought together to form a friction welding between the ports, preferably immediately after removal of the tool.
  • the ports in the end portion can be interconnected mechanically by mounting of a flat band, foil or wire around the ports in the end portion.
  • the step of adapting an end portion of the web-MPE tubing may involve, following removal of the web, opening up of the end portion by bending the ports in the end portion relatively apart from each other by a tool to a fan-shaped appearance, before pushing the adjacent ports together by opposing forces.
  • the invention thus further relates to a method for producing a heat exchanger comprising the steps of adapting an end portion of a web based Multi Port Extrusion tubing (web-MPE tubing) to fit into the opening in a wall of a header, by means of the method for producing a web-MPE tubing mentioned above, the web-MPE tubing comprising two or more individual ports interlinked by web having a thickness less than the port diameter of the individual ports; inserting the end portion of the web-MPE tubing into the opening of the header; joining the web-MPE tubing to the header at the opening in the wall of the header.
  • web-MPE tubing web based Multi Port Extrusion tubing
  • the step of joining the web-MPE tubing to the header suitably comprises fixing the end portion of the web-MPE to the header by brazing, soldering, welding or gluing.
  • the invention thus further relates to a heat exchanger comprising at least one web based Multi Port Extrusion tubing (web-MPE tubing) and at least one header, wherein the heat exchanger has been manufactured by the above method.
  • Fig. 1 shows a state of the art joint between a header and a web-MPE with many ports/openings
  • Fig. 2 shows a state of the art joint between a header and a web-MPE where all ports are collected in a bundle
  • Fig. 3 shows a joint between a header and a web-MPE according to the present invention
  • Figs. 4-10 show forming steps according to the present invention of a web-MPE for making the joint as shown in Fig. 3.
  • Fig. 1 discloses a state of the art web-MPE tubing 1 connected to a header 2 by brazing/soldering or the similar.
  • the web-MPE has several ports 20, 21 , 22, 23, 24, 25 matching corresponding openings 20’, 2T, 22’, 23’, 24’, 25’ in the header 2.
  • the said ports are separated by webs 3, 4, 5, 6, 7.
  • the webs can be provided with several cut-outs as indicated at 10, 11 , 12, 13, 14.
  • each port mates an individual opening which results in many ports and openings that has the disadvantage of many brazing or soldering points that will increase the likelihood of leaks. Further, this implies also large header and large internal volume of same that is the opposite of what the market requires, as refrigerant charge must be minimized as much as possible in the future.
  • Fig. 2 discloses a state of the art web-MPE 1 similar to that of Fig. 1 , connected to a header 2 by brazing/soldering, or the similar.
  • the web-MPE has several ports 20, 21 , 22, 23, 24, 25 mating one large opening 26’ in the header 2.
  • the ports 20, 21 , 22, 23, 24, 25 are processed and arranged so a certain minimum length at the end portion 30, at the ends 2A, 2B, 2C, 2D, 2E, 2F to be connected to the header 2, are parallel and there is one elongated opening 27’ in the header for all ports.
  • the certain minimum length is typically chosen to give a sufficient connection with the opening in the header.
  • the invention relates generally to the provision of a joint between an end of a web based Multi Port Extrusion (web-MPE) tubing 1 and a header 2, said MPE being a web like extrusion (web-MPE) with two or more individual ports 2A, 2B, 2C, 2D, 2E, 2F interlinked with webs 3, 4, 5, 6, 7, said webs having a thickness less than the port diameter of the individual ports, where the web-MPE tubing end portion has an adaptive interface with an opening 27’ in a wall of a header 2 so that the web-MPE tubing end portion is adapted to fit into the opening (27’) of the header (2).
  • web-MPE Multi Port Extrusion
  • the end portion 30 of the web-MPE tubing has a shape that is complementary to an opening 27’ that is pre-shaped in the header 2.
  • the web-MPE tubing end portion 30 can be processed to be adapted to the header opening in that the web(s) 3, 4, 5, 6, 7 between the ports 2A, 2B, 2C, 2D, 2E, 2F at the end portion 30, i.e. from the end of the tubing and inwards away from the end region to be adapted, are removed, and that the ports 2A, 2B, 2C, 2D, 2E, 2F are fixed to each other via adjacent sides, i.e. by side surfaces facing each other.
  • the fixation between the ports is done by friction welding, gluing or mechanically or any other appropriate means.
  • the web MPE tubing end portion 30 is fixed to the header 2 by brazing, soldering or welding or any other appropriate means.
  • the invention also relates to a method for producing a web based Multi Port Extrusion (web-MPE) tubing 1 adapted to be joined with a header 2 comprised in a heat exchanger.
  • web-MPE tubing comprises two or more individual ports 2A-F interlinked by webs 3, 4, 5, 6, 7 having a thickness less than the port diameter of the individual ports 2A-F, said method comprising the step of adapting an end portion 30 of the web-MPE tubing 1 to fit into an opening 27’ in a wall of the header 2.
  • the processing of the end portion 30 can be done according to the steps shown in Fig.
  • ports are suitably aligned in parallel in one plane and inline in a second plane, and that ports are attached to each other to ensure easy assembly into the header. It is preferred that any oxidation layer on the adjacent surfaces of the ports is removed before attaching them together since this will secure a good connection.
  • the invention also relates also to a method for producing a heat exchanger by connecting at least one end of a web based Multi Port Extrusion (web-MPE) tubing 1 and at least one header 2, said web-MPE being a web like extrusion with two or more individual ports 2A, 2B, 2C, 2D, 2E, 2F interlinked by webs 3, 4, 5, 6, 7, said webs having a thickness less than the port diameter of the individual ports 2A, 2B, 2C, 2D, 2E, 2F, the end region of the web-MPE tubing 1 is and adapting the end region of the web-MPE tubing (1 ) to fit into one opening (27’) in a wall of the header (2).
  • web-MPE Multi Port Extrusion
  • the end region of the web-MPE tubing 1 can be processed in that the webs 3, 4, 5, 6, 7 between the ports 2A, 2B, 2C, 2D, 2E, 2F from the end thereof and inwards are removed by a tool T, and that the ports are pushed together by opposing forces F1 , F2.
  • the invention moreover relates to a web-MPE tubing in which the end region of the web-MPE tubing comprises ports that are in parallel relationship to each other and where the surfaces of the ports are joined together.
  • the surfaces of the ports may be joined metallurgically, i.e. the metal of the web-MPE tubing has at least partially melted to form a solid state joint between the adjacent ports.
  • the ports 2A, 2B, 2C, 2D, 2E, 2F can in their end regions be opened up by bending them relatively apart from each other by a tool E to a fan-shaped appearance, before being pushed together by the opposing forces F1 , F2.
  • the ports 2A, 2B, 2C, 2D, 2E, 2F can be fixed to each other via their adjacent sides.
  • the tool E may be constituted by several wedge shaped elements that forces the ports 2A, 2B, 2C, 2D, 2E, 2F apart as the tool is forced inwards onto the end of the web-MPE tubing.
  • the advantage of the bending is that it will more easy to obtain a good alignment of the end of the ports in the final steps, without using excessive forces that may cause deformation of the cross-section of the ports.
  • the end of the web-MPE tubing 1 can be processed in that the webs 3, 4, 5, 6, 7 between the ports 2A, 2B, 2C, 2D, 2E, 2F from the end thereof and inwards (away from the end in the length direction of the web-MPE tubing) in the region to be processed, is removed by a tool T that creates a friction energy which heats and removes oxide layers of the ports, and after removal of the tool T, the ports are brought together to form a friction welding between the ports 2A, 2B, 2C, 2D, 2E, 2F, preferably immediately after removal of the tool T. Removal of the oxide layer improves the possibility to get a satisfactory connection.
  • the end portion of the web-MPE tubing 1 can be entered into an opening 27’ in the header 2 and joined by one of the following operations; brazing, soldering, welding or gluing.
  • Fig. 4 discloses a basic extrusion of a web-MPE with ports 20, 21 , 22 23, 24, 25 and webs 3, 4, 5, 6, 7.
  • the left part of the Figure shows a cross-section along line A-A.
  • Fig. 5 shows a first processing step where webs between the ports are removed at the interface point by for instance punching, slitting or machining. This is indicated by reference signs 10, 1 1 , 12, 13, 14. The left part of the Figure shows a cross-section along line A-A.
  • Fig. 6 it is disclosed a second processing step where the side of the ports pointing towards each other are exposed to a rotating or reciprocating tool T (shown in black).
  • the tool creates friction energy to heat/remove any oxide layer of the aluminium based web-MPE tubing.
  • the heat generation and removal of oxide layer makes it possible to obtain a weld connection between the parts.
  • the ports can be held in parallel to each other or open up with an angle between them by a bending tool E to obtain a fan-shaped appearance as shown in Fig. 7. When subsequently being pushed together this bending will improve aligning of the ports.
  • FIG. 8 A further processing step is shown in Fig. 8 where the friction tool is removed, and the ports are pushed together by opposing forces F1 , F2 immediately after step 2 to form a friction welding between the ports.
  • the strength of the friction weld is not important as long as the ports stick together until ends of the ports are inserted into the opening in the header. The later brazing process will ensure leak free / tight joints between port and header.
  • a trim cut of the port ends at the end portion 30 may be performed to obtain uniform length of the ports, see dotted line C - C of Fig. 9. The reason for this can be to prevent that the ends disturb the effective flow area in the header.
  • Fig. 10 additionally discloses a side view and an end view of the web-MPE. The trim cut may be done along the line indicated by the arrows.
  • the letter“A” indicates a position where the interconnection of the ports can be applied, either being a laser weld, gluing, or mechanical mounting element or any other appropriate fixation means.
  • the strength of the interconnection between the ports is not crucial, as long as the ports stick together until they have been inserted into the header. Further, the ports should preferably be parallel enough to meet tolerances required for the later brazing/soldering process. After brazing/soldering, the joint between the tube and header will be leak free and refrigerant tight.
  • the alignment of the ports and their connection to each other can be obtained in different ways. Interconnecting the ports it can for example be obtained by a gluing method which does not interfere with a subsequent brazing/soldering process, or a laser weld across the ports. The interconnection may also be established mechanically by mounting of a flat band, foil or wire (15) around the port ends, see Fig. 1 1 .
  • the band, foil or wire may for example be made from a brazing filler material (AISM2 or similar).
  • the invention also relates to a method for producing a heat exchanger comprising the steps of adapting an end portion 30 of a web based Multi Port Extrusion web-MPE tubing 1 to fit into the opening 27’ in a wall of a header 2, by means of the method described above, where the web-MPE tubing comprises two or more individual ports 2A-F interlinked by webs 3, 4, 5, 6, 7 having a thickness less than the port diameter of the individual ports 2A-F; followed by inserting the adapted end portion 30 of the web- MPE tubing 1 into the opening 27’ of the header 2; and joining the web-MPE tubing 1 to the header 2 at the opening 27’ in the wall of the header 2.
  • the step of joining the web-MPE tubing 1 to the header 2 preferably comprises fixing the end portion 30 of the web-MPE to the header 2 by brazing, soldering, welding or gluing.
  • the invention also relates to a heat exchanger comprising at least one web based Multi Port Extrusion (web-MPE) tubing 1 and at least one header 2, wherein the heat exchanger has been manufactured according to the above described method.
  • web-MPE Multi Port Extrusion

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention concerne un tubage formé par extrusion à orifices de type en bande (web-MPE) (1) comprenant au moins deux orifices individuels (2A-F) reliés entre eux par une ou des bandes (3, 4, 5, 6, 7) ayant une épaisseur inférieure au diamètre d'orifices des orifices individuels (2A-F), ledit tubage web-MPE ayant une partie d'extrémité (30) conçue pour être reliée à un collecteur (2) compris dans un échangeur de chaleur, la partie d'extrémité (30) du tubage web-MPE étant adaptée à une ouverture (27') dans une paroi du collecteur (2), en étant formée pour être complémentaire à la forme de l'ouverture (27'), de telle sorte que la partie d'extrémité de tubage web-MPE est conçue pour s'adapter dans l'ouverture (27') du collecteur (2), un procédé de production d'un tubage web-MPE, un procédé de production d'un échangeur de chaleur et un échangeur de chaleur.
PCT/EP2020/051413 2019-01-22 2020-01-21 Extrusion à orifices multiples de type en bande (web-mpe) WO2020152168A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1950070-1 2019-01-22
SE1950070 2019-01-22

Publications (1)

Publication Number Publication Date
WO2020152168A1 true WO2020152168A1 (fr) 2020-07-30

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002053303A1 (fr) * 2001-01-03 2002-07-11 Brazeway, Inc. Procede et dispositif permettant la fabrication d'elements files
JP2013071176A (ja) * 2011-09-29 2013-04-22 Mitsubishi Alum Co Ltd アルミニウム製細管の製造方法
WO2014137217A1 (fr) 2013-03-04 2014-09-12 Norsk Hydro Asa Conception d'entrée et de sortie d'échangeur de chaleur
WO2016083457A1 (fr) 2014-11-25 2016-06-02 Sapa As Conception de tube formé par extrusion à orifices multiples

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002053303A1 (fr) * 2001-01-03 2002-07-11 Brazeway, Inc. Procede et dispositif permettant la fabrication d'elements files
JP2013071176A (ja) * 2011-09-29 2013-04-22 Mitsubishi Alum Co Ltd アルミニウム製細管の製造方法
WO2014137217A1 (fr) 2013-03-04 2014-09-12 Norsk Hydro Asa Conception d'entrée et de sortie d'échangeur de chaleur
WO2016083457A1 (fr) 2014-11-25 2016-06-02 Sapa As Conception de tube formé par extrusion à orifices multiples

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