EP1048378B1 - Method of casting-in of hollow bodies in iron castings - Google Patents

Method of casting-in of hollow bodies in iron castings Download PDF

Info

Publication number
EP1048378B1
EP1048378B1 EP99125724A EP99125724A EP1048378B1 EP 1048378 B1 EP1048378 B1 EP 1048378B1 EP 99125724 A EP99125724 A EP 99125724A EP 99125724 A EP99125724 A EP 99125724A EP 1048378 B1 EP1048378 B1 EP 1048378B1
Authority
EP
European Patent Office
Prior art keywords
hollow bodies
casting
iron castings
hollow body
components
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
EP99125724A
Other languages
German (de)
French (fr)
Other versions
EP1048378A1 (en
Inventor
Ulf Dipl.-Ing. Schmidtgen
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.)
MAN Truck and Bus SE
Original Assignee
MAN Nutzfahrzeuge AG
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 MAN Nutzfahrzeuge AG filed Critical MAN Nutzfahrzeuge AG
Publication of EP1048378A1 publication Critical patent/EP1048378A1/en
Application granted granted Critical
Publication of EP1048378B1 publication Critical patent/EP1048378B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product

Definitions

  • the invention relates to a method for pouring hollow bodies into cast iron components.
  • the method according to the invention is based on hollow bodies, which are initially in sheet metal be preformed. Before the hollow body is completely closed, there is air pumped out, so that a certain negative pressure forms. Only after pumping out the The hollow body is sealed air-tight.
  • the vacuum can result in Do not build up a hollow body such a high pressure that the hollow body inflates and after the melt has cooled, contact with the walls of the hollow body is lost, or that the hollow body is even damaged by excess pressure would.
  • the hollow body can be heated before closing, so that after the closure and cooling also negative pressure in the hollow body sets and set the aforementioned advantages when pouring into the molten metal.
  • the method according to the invention is particularly advantageous in the case of exhaust manifolds from Internal combustion engines applicable.
  • Exhaust manifolds provide good insulation. Through the Insulation improves the performance of an exhaust gas turbine and unwanted heat radiation greatly reduced from the exhaust manifold to the environment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Exhaust Silencers (AREA)
  • Supercharger (AREA)

Description

Die Erfindung bezieht sich auf ein Verfahren zum Eingießen von Hohlkörpern in Eisengußbauteile.The invention relates to a method for pouring hollow bodies into cast iron components.

Um die Isolierwirkung von Bauteilen in Gießausführung zu erhöhen ist es wünschenswert, Hohlräume vorzusehen, um die gute Isolierung der eingeschlossenen Luftschicht zu nutzen. Da es nicht möglich ist Hohlräume unmittelbar in Guß herzustellen, werden die Bauteile in der Regel aus zwei oder mehreren Bauteilen gefertigt, zwischen denen sich nach der Montage Luftzwischenräume befinden. Eine derartige Bauweise ist aber relativ aufwendig. Besonders bei Motoren mit Turboladern ist man bestrebt die Auspuffleitungen zu isolieren und nicht die Leistung der Abgasturbine durch Abkühlung der Abgase zu beeinträchtigen. Bei einem Massenprodukt, wie es Auspuffleitungen von Brennkraftmaschinen darstellen wirkt sich eine kostengünstigere Fertigung auf die Wettbewerbsfähigkeit des gesamten Produkts aus.In order to increase the insulating effect of cast components, it is desirable to Provide cavities to ensure good insulation of the enclosed air layer to use. Since it is not possible to produce cavities directly in cast iron the components are usually made up of two or more components, between which there are air gaps after installation. Such a construction is relatively complex. Exhaust pipes are particularly desirable for engines with turbochargers to isolate and not the performance of the exhaust gas turbine by cooling of the exhaust gases. With a mass product like there are exhaust pipes of internal combustion engines represent a less expensive production Competitiveness of the entire product.

zur Herstellung eines Gußwerkstückes mit einem durchgehenden kanal ist es aus DE-A-19 612 678 bekannt, ein metallisches Rohr einzugießen, dessen Enden aus dem gegossenen Körper hinausragen und abgetrennt werden.for the production of a cast workpiece with a continuous channel it is known from DE-A-19 612 678, a metallic tube pour in, the ends of which are cast from the body protrude and be separated.

Es ist daher Aufgabe der Erfindung Hohlräume in Gußbauteilen möglichst rationell zu fertigen.It is therefore an object of the invention to make cavities in cast components as rational as possible finished.

Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale des Patentanspruches.This object is achieved by the characterizing features of the claim.

Das erfindungsgemäße Verfahren geht von Hohlkörpern aus, die zunächst in Blech vorgeformt werden. Bevor der Hohlkörper vollständig verschlossen wird, wird Luft abgepumpt, so daß sich ein gewisser Unterdruck bildet. Erst nach dem Abpumpen der Luft wird der Hohlkörper gasdicht verschlossen.The method according to the invention is based on hollow bodies, which are initially in sheet metal be preformed. Before the hollow body is completely closed, there is air pumped out, so that a certain negative pressure forms. Only after pumping out the The hollow body is sealed air-tight.

Nach dem Eingießen in die heiße Metallschmelze kann sich infolge des Unterdrucks in Hohlkörper kein so hoher Überdruck aufbauen, daß sich der Hohlkörper aufbläht und nach dem Erkalten der Schmelze der Kontakt mit den Wandungen des Hohlkörpers verloren geht, oder daß der Hohlkörper durch Überdruck sogar Schaden nehmen würde.After pouring into the hot molten metal, the vacuum can result in Do not build up a hollow body such a high pressure that the hollow body inflates and after the melt has cooled, contact with the walls of the hollow body is lost, or that the hollow body is even damaged by excess pressure would.

Anstelle von Unterdruck kann der Hohlkörper vor dem Verschließen erhitzt werden, so daß sich nach dem Verschließen und Abkühlen ebenfalls Unterdruck im Hohlkörper einstellt und beim Eingießen in die Metallschmelze die vorgenannten Vorteile einstellen.Instead of negative pressure, the hollow body can be heated before closing, so that after the closure and cooling also negative pressure in the hollow body sets and set the aforementioned advantages when pouring into the molten metal.

Besonders vorteilhaft ist das erfindungsgemäße Verfahren bei Auspuffkrümmern von Brennkraftmaschinen anwendbar. Durch das Eingießen von Hohlkörpern in die Gußeisenschmelze von Auspuffkrümmern wird eine gute Isolierwirkung erreicht. Durch die Isolierung wird die Leistung einer Abgasturbine verbessert und nicht gewollte Wärmeabstrahlung vom Auspuffkrümmer in die Umgebung stark reduziert.The method according to the invention is particularly advantageous in the case of exhaust manifolds from Internal combustion engines applicable. By pouring hollow bodies into the cast iron melt Exhaust manifolds provide good insulation. Through the Insulation improves the performance of an exhaust gas turbine and unwanted heat radiation greatly reduced from the exhaust manifold to the environment.

Claims (1)

  1. A method of casting hollow bodies in iron casting components, characterized in that first the hollow bodies are shaped beforehand in sheet metal, before the complete closure the hollow bodies are either partially evacuated of air or are heated, and after the closure the hollow bodies are inserted into a casting mould and are enclosed completely or in part with liquid metal.
EP99125724A 1999-04-27 1999-12-23 Method of casting-in of hollow bodies in iron castings Expired - Lifetime EP1048378B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19918987 1999-04-27
DE19918987A DE19918987A1 (en) 1999-04-27 1999-04-27 Process for pouring hollow bodies into cast iron components

Publications (2)

Publication Number Publication Date
EP1048378A1 EP1048378A1 (en) 2000-11-02
EP1048378B1 true EP1048378B1 (en) 2003-07-23

Family

ID=7905942

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99125724A Expired - Lifetime EP1048378B1 (en) 1999-04-27 1999-12-23 Method of casting-in of hollow bodies in iron castings

Country Status (2)

Country Link
EP (1) EP1048378B1 (en)
DE (2) DE19918987A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10054330A1 (en) * 2000-11-02 2002-05-08 Bosch Gmbh Robert Cast-sheet metal composite body and method for its production
JP4322062B2 (en) * 2003-07-23 2009-08-26 日本発條株式会社 Engine block and manufacturing method thereof
DE102016211358A1 (en) 2016-06-24 2017-12-28 Bayerische Motoren Werke Aktiengesellschaft Casting component and method for producing a cast component

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1151901B (en) * 1957-11-05 1963-07-25 Schmidt Gmbh Karl Pipes to be poured into castings such as oil pipes in machine parts
JPS5557368A (en) * 1978-10-23 1980-04-28 Nissan Motor Co Ltd Production of hollow casting
CH640440A5 (en) * 1979-06-29 1984-01-13 Fischer Ag Georg Method for the production of a metal casting with at least one hole and a die for its production
DE3642978C1 (en) * 1986-12-17 1988-06-16 Bayerische Motoren Werke Ag Method for the production of holes
DE3903310C2 (en) * 1989-02-04 1992-10-22 Mahle Gmbh METHOD FOR PRODUCING A MOLDED PART FROM IN PARTICULAR TO BE PROVIDED WITH A POROUS NIGHT-DUTY, IN PARTICULAR ALUMINUM.
DE3941381A1 (en) * 1989-12-15 1991-06-20 Audi Ag CYLINDER BLOCK FOR AN INTERNAL COMBUSTION ENGINE
FR2701295B1 (en) * 1993-02-05 1995-04-28 Sindra Sa Fuel injection rail and one of its manufacturing processes.
DE4327242A1 (en) * 1993-08-13 1995-02-16 Luk Fahrzeug Hydraulik Process for the production of die castings
DE19504949C1 (en) * 1995-02-15 1996-08-22 Ifu Engineering Und Consulting Process for producing a composite casting in a casting mold
DE19612678A1 (en) * 1996-03-29 1997-10-02 Audi Ag Method of producing cast piece

Also Published As

Publication number Publication date
EP1048378A1 (en) 2000-11-02
DE59906352D1 (en) 2003-08-28
DE19918987A1 (en) 2000-11-02

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