EP0298340B1 - Dispositif pour la fabrication d'un tronçon d'un tuyau collecteur par la métallurgie de poudres - Google Patents

Dispositif pour la fabrication d'un tronçon d'un tuyau collecteur par la métallurgie de poudres Download PDF

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Publication number
EP0298340B1
EP0298340B1 EP88110264A EP88110264A EP0298340B1 EP 0298340 B1 EP0298340 B1 EP 0298340B1 EP 88110264 A EP88110264 A EP 88110264A EP 88110264 A EP88110264 A EP 88110264A EP 0298340 B1 EP0298340 B1 EP 0298340B1
Authority
EP
European Patent Office
Prior art keywords
recesses
collecting tube
profiled tubes
shell
half rings
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
EP88110264A
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German (de)
English (en)
Other versions
EP0298340A1 (fr
Inventor
Christian Greune
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.)
MTU Aero Engines GmbH
Original Assignee
MTU Motoren und Turbinen Union Muenchen GmbH
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 MTU Motoren und Turbinen Union Muenchen GmbH filed Critical MTU Motoren und Turbinen Union Muenchen GmbH
Publication of EP0298340A1 publication Critical patent/EP0298340A1/fr
Application granted granted Critical
Publication of EP0298340B1 publication Critical patent/EP0298340B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • 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

Definitions

  • the invention relates to a device for powder-metallurgical production of a header section of a heat exchanger block and its connection to a plurality of profile tubes permanently connected thereto.
  • a disadvantage of this arrangement is that only a boundary surface of the wall section to be formed is defined by the hollow shape.
  • the wall thickness is determined by the bulk quantity, with one difficulty being to keep the wall thickness tolerances low. This is particularly difficult due to the close arrangement of the large number of profile tubes.
  • the object of the invention is to provide a device according to the preamble of the main claim, in which an uncomplicated, quick and economical production of a heat exchanger block is made possible, while at the same time a precisely defined wall thickness of the header pipes can be achieved.
  • the main advantage of the invention can be seen in the fact that the profile tubes can be quickly brought into the corresponding position and are positioned exactly.
  • the profile tubes are plugged onto the pins and are thereby supported from the inside, as a result of which the powder metallurgical material to be filled into the cavity can be filled or compressed with high pressure without fear of deformation of the profile tubes.
  • the dimensions of the cavity are defined, so that the wall thickness of the manifold wall section to be produced can be produced with small tolerances. Finally, a quick and easy opening of the device and removal of the finished component is guaranteed.
  • the pins protrude into the cutouts of the half rings. This ensures that the profile tubes are supported from the inside in the entire area of the passage through the cavity.
  • two inner shells are provided, the recesses of the radially inner inner shell having a shape and size such that the pins but not the profile tubes fit through.
  • the profile tubes protrude somewhat beyond the wall section, so that additional soldered connections can be made between the profile tube and the wall section.
  • the cavity is preferably filled with a sinterable powder by a spraying process, this powder being metal powder coated with plastic. This ensures rapid filling and good compression of the cavity.
  • a heat exchanger block 1 shown in Fig. 1 consists essentially of an inlet header 2 and an axially parallel outlet header 3, which are connected to each other by a plurality of U-shaped curved profile tubes.
  • a fluid flows from the inlet header 2 through the profile tubes 4 to the outlet header 3.
  • a gas flow 15 is directed perpendicular to the profile tubes 4 (cross / counterflow), with heat exchange between the two fluids taking place via the walls of the profile tubes 4.
  • the profile tubes 4 can have round, elliptical or other streamlined cross sections.
  • the profile tubes 4 are positioned by spacers 16.
  • Fig. 2 shows the device according to the invention, in which a number of half rings 5 are arranged side by side on a foundation 14.
  • the half rings 5 are braced against one another by tensioning devices 8a and 8b and fixed on the foundation 14 via tensioning devices 7a and 7b.
  • Radially inside the half rings 5 are spaced apart by a sleeve-like cavity 9, two concentric inner shells 10a and 10b are arranged.
  • a half-cylinder 12 is again provided radially inside the inner shell 10b, which is not fixed to the foundation 14, but remains pullable downward.
  • the half rings 5 are - as can be seen in Fig. 3 - provided with a number of recesses 6, which are each provided on the parting lines of two adjacent half rings 5.
  • the recesses 6 have a shape that corresponds exactly to the outer contour of the profile tubes 4, so that the profile tubes 4 can be inserted through the recesses 6.
  • cutouts 11a and 11b are likewise provided in the half shells 10a and 10b.
  • the recesses 11a located in the radially outer half-shell 10a have the same shape and size on how the recesses 6, so that the profile tubes 4 are to be pushed through here.
  • the recesses 11b have the shape of the inner contour of the profile tubes 4, so that the inner shell 10b serves as a stop for the inserted profile tubes 4.
  • pins 13 are attached, which also have the shape of the inner contour of the profile tubes 4. These pins 13 are inserted through the recesses 11 a and 11 b and protrude into the recesses 6 of the half rings 5.
  • a profile tube 4 shown in FIG. 2 is inserted through the cutouts 6 and 11, at the same time enclosing a pin 13 in its end section and being supported on the inner shell 10b.
  • Fig. 4 shows the two concentric inner shells 10a and 10b in perspective, both of which are provided with a number of regularly distributed, coaxial bores 11a and 11b.
  • Fig. 5 shows in perspective the half cylinder 12 with the attached pin 13, which are adapted to the inner contour of the profile tubes 4.
  • FIG. 6 shows an axial section through a pin 13. 17 different embodiments can be seen above and below the center line. An embodiment with only one inner shell 10b can be seen above the center line 17, the profile tubes 4 terminating with the inner surface of the wall section formed in the hollow mold 9.
  • the pins 13 are connected to the half cylinder 12 by means of welded connections 18. In other embodiments, other types of connection such as soldering, screwing, gluing or sintering are conceivable.
  • the wall sections produced in this way with attached profile tubes are assembled, whereby the header tubes 2 and 3 are formed.
  • the connection can be made by sintering, soldering or welding.
  • the wall sections expediently have about 1/4 the length of the header pipes 2 or 3, so that 8 components together form a heat exchanger block 1.
  • the invention is not limited to the embodiment shown, but can be used analogously for every conceivable manifold shape, without departing from the basic idea of the invention.
  • the inner shells 10a, 10b, the half rings 5 and the half cylinder 12 could have a flat shape in their central section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Powder Metallurgy (AREA)

Claims (9)

1. Dispositif pour la fabrication d'un tronçon de tuyau collecteur par la métallurgie de poudres et sa liaison avec un grand nombre de tubes profilés réunis à lui de façon indétachable, caractérisé en ce que:
un certain nombre de demi-anneaux (5) sont disposés l'un à côté de l'autre, face contre face et comportent sur leurs surfaces de contact des évidements (6), qui sont adaptés au contour extérieur des tubes profilés (4),
b) les demi-anneaux (5) sont serrés ensemble par des dispositifs de serrage (8) en une demi-coquille,
c) on a prévu à l'intérieur de la demi-coquille, de façon concentrique et à une certaine distance une ou plusieurs coquilles intérieures en forme de demi-cylindre (10a, 10b), qui comportent des évidements (11 a, 11 b) alignés avec les évidements (6) des demi-anneaux,
d) l'espace creux (9) formé entre la demi-coquille et la coquille intérieure (10a) représente la forme négative d'un secteur de paroi du tube collecteur (2), l'espace creux (9) pouvant être rempli avec de la poudre apte au frittage à travers une ou plusieurs ouvertures de remplissage,
e) on a prévu radialement à l'intérieur de la (des) coquille(s) intérieure(s) (10a, 10b) un demi-cylindre (12), sur lequel sont fixés des tourillons (13), qui présentent la forme du contour intérieur des tubes profilés (4).
2. Dispositif selon la revendication 1, caractérisé en ce que les tourillons (13) pénètrent à l'intérieur des évidements (6) des demi-anneaux (5).
3. Dispositif selon les revendications 1 et 2, caractérisé en ce que, on a prévu deux coquilles intérieures (10a, 10b), les évidements (11 b) de la coquille intérieure (10b) située radialement le plus vers le centre ayant une dimension telle que les tourillons (13) y pénètrent mais pas les tubes profilés (4).
4. Dispositif selon les revendications 1 à 3, caractérisé en ce que le demi-cylindre (12) peut être enlevé radialement vers l'intérieur.
5. Procédé pour la fabrication d'un bloc d'échangeur thermique avec au moins un tuyau collecteur et un grand nombre de tubes profilés reliés à lui de façon indémontable, à l'aide d'un dispositif selon une ou plusieurs des revendications 1 à 4, caractérisé en ce que l'espace creux (9) est rempli par injection de poudre apte au frittage.
6. Procédé selon la revendication 5, caractérisé en ce que la poudre frittée est une poudre métallique enrobée de matière plastique.
7. Procédé selon la revendication 5, caractérisé en ce qu'après le processus d'injection, le demi-cylindre (12) et les demi-anneaux (5) sont enlevés et la pièce moulée par injection est durcie par frittage et unie aux tubes profilés (4) avec étanchéité pour les gaz.
8. Procédé selon les revendications 5 à 7, caractérisé en ce que les pièces moulées et frittées formant un segment de paroi du tuyau collecteur (2) sont accouplées pour former un bloc d'échangeur thermique.
9. Procédé selon la revendication 8, caractérisé en ce que l'accouplement se fait par frittage, brasage ou soudage.
EP88110264A 1987-07-07 1988-06-28 Dispositif pour la fabrication d'un tronçon d'un tuyau collecteur par la métallurgie de poudres Expired - Lifetime EP0298340B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3722329 1987-07-07
DE3722329A DE3722329C1 (de) 1987-07-07 1987-07-07 Vorrichtung und Verfahren zur pulvermetallurgischen Herstellung eines Sammelrohrabschnitts eines Waermetauscherblocks

Publications (2)

Publication Number Publication Date
EP0298340A1 EP0298340A1 (fr) 1989-01-11
EP0298340B1 true EP0298340B1 (fr) 1990-12-12

Family

ID=6331020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88110264A Expired - Lifetime EP0298340B1 (fr) 1987-07-07 1988-06-28 Dispositif pour la fabrication d'un tronçon d'un tuyau collecteur par la métallurgie de poudres

Country Status (4)

Country Link
US (1) US4867412A (fr)
EP (1) EP0298340B1 (fr)
JP (1) JPS6417807A (fr)
DE (1) DE3722329C1 (fr)

Families Citing this family (20)

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DE3825486A1 (de) * 1988-07-27 1990-02-01 Mtu Muenchen Gmbh Verfahren zur herstellung der verbindung von profilrohrenden einer waermetauschermatrix mit einem sammel- oder verteilerrohr
DE3914773C2 (de) * 1989-05-05 1994-03-03 Mtu Muenchen Gmbh Wärmetauscher mit mindestens zwei Sammelrohren
US5073326A (en) * 1989-08-09 1991-12-17 Prism Design & Engineering, Inc. Apparatus and method for injection molding articles with sub-surface portions
CA2179947A1 (fr) * 1995-09-25 1997-03-26 Michael Gunnar Johnson Moule servant a former des ouvertures dans un element moule
US6587742B2 (en) * 2000-12-20 2003-07-01 Mark Manuel Method and apparatus for the creation of a tool
US7222834B2 (en) * 2001-08-14 2007-05-29 Floodcooling Technologies, Llc Tool and a method for making a tool
US20040038074A1 (en) * 2001-11-01 2004-02-26 Mark Manuel Tool and a method for creating a tool
US7338717B2 (en) * 2002-11-07 2008-03-04 Floodcooling Technologies, Llc Tool and a method for creating the tool
US7195223B2 (en) * 2002-12-02 2007-03-27 Mark Manuel System and a method for cooling a tool
US20050196232A1 (en) * 2004-03-05 2005-09-08 Mark Manuel Method and an apparatus for the creation of a tangible item, such as a tool and/or a part, and a tangible item
US20070102837A1 (en) * 2005-09-23 2007-05-10 Mark Manuel Tool having desired thermal management properties and a method for producing a tool having desired thermal management properties
US7563091B2 (en) * 2005-01-18 2009-07-21 Floodcooling Technologies, L.L.C. Tool having an ejection assembly, a method for making such a tool, and a method for ejecting a formed object from a tool
US7278197B2 (en) * 2005-01-18 2007-10-09 Floodcooling Technologies, Llc Method for producing a tool
US8108982B2 (en) * 2005-01-18 2012-02-07 Floodcooling Technologies, L.L.C. Compound mold tooling for controlled heat transfer
US20060156787A1 (en) * 2005-01-18 2006-07-20 Mark Manuel Laminated tool and a method for forming a tool
US7376484B2 (en) * 2005-01-18 2008-05-20 Floodcooling Technologies, Llc Method for building a tool
US7379787B2 (en) * 2005-04-09 2008-05-27 Floodcooling Technologies, Llc Method for forming a tangible item and a tangible item formed by the method
US20070040298A1 (en) * 2005-08-18 2007-02-22 Mark Manuel Assembly and a method for cooling and/or forming an item
US20070039153A1 (en) * 2005-08-18 2007-02-22 Mark Manuel Method for forming a tool and a tool
US9499950B1 (en) * 2015-11-06 2016-11-22 Lee A. Smith Revetment block mat with linear sides

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US2391615A (en) * 1942-08-25 1945-12-25 Caron Joseph Victor Method of making heat interchange apparatus
GB584174A (en) * 1943-12-27 1947-01-08 Gen Motors Corp Improved heat exchanger
US3873805A (en) * 1961-12-26 1975-03-25 Inoue K Method of making a heat exchanger
US3970488A (en) * 1975-03-07 1976-07-20 Townsend And Townsend Method and apparatus for molding splices in cables
US4312687A (en) * 1980-12-15 1982-01-26 Chevron Research Company Solar collector headers
US4715576A (en) * 1981-07-15 1987-12-29 Corning Glass Works Apparatus for forming a flexible mask
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DE3324915C2 (de) * 1982-08-14 1985-04-18 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Verfahren zur Herstellung eines Wärmetauscherblocks
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US4717113A (en) * 1985-06-18 1988-01-05 Eee Co., Inc. Segmented injection mold system

Also Published As

Publication number Publication date
DE3722329C1 (de) 1988-11-24
EP0298340A1 (fr) 1989-01-11
US4867412A (en) 1989-09-19
JPS6417807A (en) 1989-01-20

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