EP0199311B1 - Method of casting in of inserts in a cylinder head - Google Patents

Method of casting in of inserts in a cylinder head Download PDF

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Publication number
EP0199311B1
EP0199311B1 EP86105411A EP86105411A EP0199311B1 EP 0199311 B1 EP0199311 B1 EP 0199311B1 EP 86105411 A EP86105411 A EP 86105411A EP 86105411 A EP86105411 A EP 86105411A EP 0199311 B1 EP0199311 B1 EP 0199311B1
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EP
European Patent Office
Prior art keywords
cylinder head
insert
holding device
hole
inserts
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
EP86105411A
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German (de)
French (fr)
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EP0199311A2 (en
EP0199311A3 (en
Inventor
Toni Schmitz
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Kloeckner Humboldt Deutz AG
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Kloeckner Humboldt Deutz AG
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Priority to AT86105411T priority Critical patent/ATE55808T1/en
Publication of EP0199311A2 publication Critical patent/EP0199311A2/en
Publication of EP0199311A3 publication Critical patent/EP0199311A3/en
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Publication of EP0199311B1 publication Critical patent/EP0199311B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/248—Methods for avoiding thermal stress-induced cracks in the zone between valve seat openings

Definitions

  • the invention relates to a method for pouring deposits into a cylinder head with bores receiving cylinder head screws according to the preamble of claim 1.
  • a cylinder head is known in which inserts designed as sleeves are arranged to introduce the forces to be transmitted from the cylinder head bolts to the cylinder head. These sleeves protrude from the cylinder head cover side of the cylinder head and are fixed in the molded body during the casting process of the cylinder head. In this known cylinder head, the sleeves are finished before the casting process. They must therefore be positioned very precisely in the molded body. Since the sleeve bores and the cylinder head bores adjoining the sleeves on the cylinder head bottom side have different diameters, they must be filled with a precisely fitting mold core during the casting process.
  • the cylinder head is unusable, since reworking the bores, among other things. is not possible due to the small sleeve thickness.
  • the known cylinder head must therefore be manufactured with a high level of manufacturing technology and casting technology.
  • a cylinder head which has inserts cast into the cylinder head to support the cylinder head screw heads.
  • the inserts are intended to reduce the specific load on the cylinder head caused by the cylinder head bolts.
  • Information on how the inserts are formed when casting the cylinder head and how the inserts are held in the necessary molded body when casting the cylinder head cannot be found in the document mentioned.
  • US-A 4,100,669 deals with a metal casting plastering machine and specifically describes how a pin is poured into a chain link of the plastering machine and subsequently pierced.
  • the invention has for its object to provide a method for pouring inlays in a cylinder head, wherein the inlays are held securely in the molded body and the holding device can be removed without problems.
  • the insert consists of solid material and is provided with a holding device which extends in the direction of the bore to be subsequently inserted and is fixed in the molded body, a simple possibility of fixing the insert in the molded body is achieved.
  • the diameter of the holding device is preferably selected to be smaller in the area encapsulated by the cylinder head than the bore to be drilled later in this area. This ensures that the holding device is completely drilled out during further machining of the cylinder head.
  • the insert In order to introduce the force to be transmitted from a cylinder head screw to the cylinder head as evenly as possible into the cylinder head, the insert is designed as a disk and the holding device is attached centrally to the disk. As a result, even with a small eccentricity of the bore for the cylinder head screw to be made later, an even pressure distribution with respect to the transmission of force from the disk to the cylinder head is ensured.
  • the holding device is made in one piece with the disc.
  • the disc together with the holding device can e.g. be cast in one piece from gray cast iron.
  • other fastening variants of the holding device on the pane can also be expedient;
  • a connection can be made by e.g. Welding, gluing, soldering and screwing possible.
  • the holding device is designed as a cylindrical pin. This form of training will be chosen if the holding device extends coaxially along the bore to be made later for the cylinder head screw for fixing in the molded body.
  • the holding device in the shape of a truncated cone, the tapered end of the holding device being fastened to the disk.
  • This design will preferably be selected if the disc is arranged in the cylinder head near an opening such as an intake port, exhaust port or cooling space. In this case, the disc is fastened in the mandrel with the frustoconical holding device.
  • the diameter of the holding device in the section cast by the cylinder head is expediently smaller than the later bore diameter.
  • cylindrical design of the holding device with the frustoconical design, for example, as described above, to form the holding device along the bore to be made later for the cylinder head screw as a cylindrical pin and in the area in which the holding device in the Shaped body is attached to end in a truncated cone. A particularly secure attachment in the molded body is thereby achieved.
  • disks 2 and 3 are arranged, which uniformly introduce the tensile forces to be transmitted by the cylinder head screws 4 into the cylinder head 1.
  • the disks 2 and 3 are provided on their sides facing away from the cylinder head screw heads 4a with a larger diameter 2a and 3a than on the sides 2b and 3b facing the cylinder head screw heads 4a.
  • the disks 2 and 3 are provided on the sides 2b and 3b with machined recesses 7 and 8 at right angles to the bores 5 and 6.
  • the recesses 7 and 8, which can be made together with the bores 5 and 6 through the openings 9 and 10, ensure distortion-free power transmission from the cylinder head screws 4 to the washers 2 and 3 and thus to the cylinder head 1.
  • the in the area of a gas exchange channel 11 arranged opening 10 is closed by a cover 12 after installation of the cylinder head screws 4.
  • the opening 9 can remain open in the air-cooled cylinder head shown here. If the space 13 which extends between the opening 9 and the disc 2 is to be used as a coolant-flowed space 13 in a liquid-cooled cylinder head 1, the opening 9 is closed in a manner analogous to the opening 10 with a stopper.
  • Figures 2 and 3 show the cylinder head 1 immediately after the casting process.
  • 2 shows an embodiment of the disks 2 'and 3', each with a cast-on cylindrical pin 14 and 15.
  • the two pins 14 and 15 extend along the bores 5 'and 6' to be made later and are fixed in the shaped body (not shown).
  • 3 shows a cylinder head 1 "with cast-in disks 2" and 3 ", wherein in this exemplary embodiment the holding devices are shown as frustoconical holding devices 16 and 17.
  • the frustoconical holding devices 16 and 17 point with their thickening ends in the Space 13 "or in the gas exchange channel 11" and are fixed during the casting process in the mandrel, not shown.
  • the frustoconically widened ends of the holding devices 16 and 17 have a larger diameter than the bores 5 "or 6" to be retrofitted.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

1. A method of casting-in inserts into a cylinder head (1, 1', 1"), in which holes (5, 5', 5") each serving to accommodate a respective cylinder head cap screw (4) are to be worked into the cylinder head (1, 1', 1") and into the inserts, in which each hole is provided with its respective insert, in which each insert is located at the respective hole's end facing the cap of the screw to be accommodated therein, is arranged substantially coaxially with the hole's axis, is made of a material different from that of the cylinder head (1, 1', 1"), and in which the cylinder head (1, 1', 1"), when being cast, will be cast around at least a part of each insert, characterized in that holding devices, one for each insert and securing the latter in a moulding box, extend along the direction of the respective holes (5, 5', 5") to be bored subsequently, and in that at least a section of each holding device has a diameter smaller than that of the respective hole so that, when the cylinder head is machined thereafter, each device will completely be bored out.

Description

Die Erfindung betrifft ein Verfahren zum Eingießen von Einlagen in einen Zylinderkopf mit Zylinderkopfschrauben aufnehmenden Bohrungen nach dem Oberbegriff des Anspruchs 1.The invention relates to a method for pouring deposits into a cylinder head with bores receiving cylinder head screws according to the preamble of claim 1.

Aus der DE-B 12 94 095 ist ein Zylinderkopf bekannt, in dem zur Einleitung der von den Zylinderkopfschrauben auf den Zylinderkopf zu übertragenden Kräften als Hülsen ausgebildete Einlagen angeordnet sind. Diese Hülsen ragen zylinderkopfdeckelseitig aus dem Zylinderkopf heraus und werden während des Gießvorgangs des Zyliderkopfes in dem Formkörper fixiert. Bei diesem bekannten Zylinderkopf sind die Hülsen vor dem Gießvorgang fertig bearbeitet. Sie müssen daher sehr genau in dem Formkörper positioniert werden. Da die Hülsenbohrungen und die sich an die Hülsen zylinderkopfbodenseitig anschließendem Zylinderkopfbohrungen unterschiedliche Durchmesser aufweisen, müssen diese mit einem jeweils genau passenden Formkern während des Gießvorgangs ausgefüllt sein.From DE-B 12 94 095 a cylinder head is known in which inserts designed as sleeves are arranged to introduce the forces to be transmitted from the cylinder head bolts to the cylinder head. These sleeves protrude from the cylinder head cover side of the cylinder head and are fixed in the molded body during the casting process of the cylinder head. In this known cylinder head, the sleeves are finished before the casting process. They must therefore be positioned very precisely in the molded body. Since the sleeve bores and the cylinder head bores adjoining the sleeves on the cylinder head bottom side have different diameters, they must be filled with a precisely fitting mold core during the casting process.

Schon bei geringen Fluchtungsfehlern der Hülsen und Zylinderkopfbohrungen ist der Zylinderkopf unbrauchbar, da ein Nacharbeiten der Bohrungen u.a. wegen der geringen Hülsen-dicke nicht möglich ist. Der bekannte Zylinderkopf muß daher mit einem hohen fertigungstechnischen und gießtechnischen Aufwand hergestellt werden.Even with slight misalignment of the sleeves and cylinder head bores, the cylinder head is unusable, since reworking the bores, among other things. is not possible due to the small sleeve thickness. The known cylinder head must therefore be manufactured with a high level of manufacturing technology and casting technology.

Aus der DE-C 940 075 ist ein Zylinderkopf bekannt, der zur Abstützung der Zylinderkopfschraubenköpfe in den Zylinderkopf eingegossene Einlagen aufweist. Dabei sollen die Einlagen die von den Zylinderkopfschrauben verursachte spezifische Belastung des Zylinderkopfes senken. Angaben, wie die Einlagen beim Gießen des Zylinderkopfes ausgebildet sind und womit die Einlagen beim Gießen des Zylinderkopfes in dem notwendigen Formkörper gehalten werden, sind der genannten Schrift nicht zu entnehmen.From DE-C 940 075 a cylinder head is known which has inserts cast into the cylinder head to support the cylinder head screw heads. The inserts are intended to reduce the specific load on the cylinder head caused by the cylinder head bolts. Information on how the inserts are formed when casting the cylinder head and how the inserts are held in the necessary molded body when casting the cylinder head cannot be found in the document mentioned.

Die US-A 4,100,669 behandelt eine Metallguß-Putzmaschine und beschreibt speziell, wie in ein Kettenglied der Putzmaschine ein Stift eingegossen wird, der nachträglich durchbohrt wird.US-A 4,100,669 deals with a metal casting plastering machine and specifically describes how a pin is poured into a chain link of the plastering machine and subsequently pierced.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Eingießen von Einlagen in einem Zylinderkopf anzugeben, wobei die Einlagen sicher in dem Formkörper gehalten werden und die Haltevorrichtung unproblematisch entfernbar ist.The invention has for its object to provide a method for pouring inlays in a cylinder head, wherein the inlays are held securely in the molded body and the holding device can be removed without problems.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des ersten Anspruchs gelöst. Dadurch, daß die Einlage aus Vollmaterial besteht und mit einer Haltevorrichtung versehen ist, die sich in Richtung der nachträglich einzubringenden Bohrung erstreckt und in dem Formkörper festgelegt ist, wird eine einfache Fixiermöglichkeit der Einlage in dem Formkörper erreicht. Weiterhin wird der Durchmesser der Haltevorrichtung vorzugsweise in dem von dem Zylinderkopf umgossenen Bereich kleiner gewählt als die später in diesem Bereich einzubringende Bohrung. Dadurch ist sichergestellt, daß die Haltevorrichtung beim weiteren Bearbeiten des Zylinderkopf gänzlich ausgebohrt wird. Außerdem ist eine derartig von dem Zylinderkopf umgossene Einlage unempfindlich gegenüber kleinen Toleranzabweichungen hinsichtlich ihrer Positionierung, da die für die weitere Verwendbarkeit des Zylinderkopfes wesentlich Zylinderkopfschraubenbohrung nach dem Gießen des Zylinderkopfes angebracht wird. Dabei wird die Bohrung für die Zylinderkopfschraube vorteilhaft zusammen mit anderen Bearbeitungsvorgängen an dem Zylinderkopf hergestellt.According to the invention, this object is achieved by the characterizing features of the first claim. Characterized in that the insert consists of solid material and is provided with a holding device which extends in the direction of the bore to be subsequently inserted and is fixed in the molded body, a simple possibility of fixing the insert in the molded body is achieved. Furthermore, the diameter of the holding device is preferably selected to be smaller in the area encapsulated by the cylinder head than the bore to be drilled later in this area. This ensures that the holding device is completely drilled out during further machining of the cylinder head. In addition, such an insert encapsulated by the cylinder head is insensitive to small tolerance deviations with regard to its positioning, since the cylinder head screw bore, which is essential for the further usability of the cylinder head, is made after the casting of the cylinder head. The hole for the cylinder head screw is advantageously produced together with other machining operations on the cylinder head.

Um die von einer Zylinderkopfschraube auf den Zylinderkopf zu übertragende Kraft möglichst gleichmäßig in den Zylinderkopf einzuleiten, ist die Einlage als Scheibe ausgebildet und die Haltevorrichtung mittig an der Scheibe befestigt. Dadurch wird auch bei einer geringen Exzentrität der später anzubringenden Bohrung für die Zylinderkopfschraube eine noch gleichmäßige Pressungsverteilung in bezug auf die Kraftübertragung von der Scheibe auf den Zylinderkopf gewährleistet.In order to introduce the force to be transmitted from a cylinder head screw to the cylinder head as evenly as possible into the cylinder head, the insert is designed as a disk and the holding device is attached centrally to the disk. As a result, even with a small eccentricity of the bore for the cylinder head screw to be made later, an even pressure distribution with respect to the transmission of force from the disk to the cylinder head is ensured.

Nach einer weiteren Ausbildung der Erfindung ist die Haltevorrichtung einteilig mit der Scheibe gefertigt. Somit kann die Scheibe zusammen mit der Haltevorrichtung z.B. aus Grauguß einstückig gegossen sein. Es können aber auch andere Befestigungsvarianten der Haltevorrichtung an der Scheibe zweckmäßig sein; je nach Materialwahl von Scheibe und Haltevorrichtung ist ein Verbinden durch z.B. Schweißen, Kleben, Löten und Schrauben möglich.According to a further embodiment of the invention, the holding device is made in one piece with the disc. Thus, the disc together with the holding device can e.g. be cast in one piece from gray cast iron. However, other fastening variants of the holding device on the pane can also be expedient; Depending on the choice of material for the washer and the holding device, a connection can be made by e.g. Welding, gluing, soldering and screwing possible.

In einer vorteilhaften Ausgestaltung ist die Haltevorrichtung als zylindrischer Stift ausgebildet. Diese Ausbildungsform wird dann gewählt werden, wenn die Haltevorrichtung sich koaxial entlang der später anzubringenden Bohrung für die Zyliderkopfschraube zur Fixierung in dem Formkörper erstreckt.In an advantageous embodiment, the holding device is designed as a cylindrical pin. This form of training will be chosen if the holding device extends coaxially along the bore to be made later for the cylinder head screw for fixing in the molded body.

Nach einer weiteren Ausbildung der Erfindung ist es vorteilhaft die Haltevorrichtung kegelstumpfförmig auszubilden, wobei das verjüngte Ende der Haltevorrichtung an der Scheibe befestigt ist. Diese Ausbildung wird vorzugsweise dann gewählt werden, wenn die Scheibe in dem Zylinderkopf nahe einer Öffnung wie z.B. Einlaßkanal, Auslaßkanal oder Kühlraum angeordnet ist. In diesem Fall wird die Scheibe mit der kegelstumpfförmig ausgebildeten Haltevorrichtung in dem Formkern befestigt. Dabei ist der Durchmesser der Haltevorrichtung in den von dem Zylinderkopf umgossenen Teilabschnitt zweckmäßigerweise kleiner als der spätere Bohrungsdurchmesser. Es kann auch zweckmäßig sein, die zylindrische Ausbildung der Haltevorrichtung mit der kegelstumpfförmigen Ausbildung zu kombinieren, um beispielsweise, wie zuvor beschrieben, die Haltevorrichtung entlang der später anzubringenden Bohrung für die Zylinderkopfschraube als zylindrischen Stift auszubilden und in dem Bereich, in dem die Haltevorrichtung in dem Formkörper befestigt ist, kegelstumpfförmig enden zu lassen. Dadurch wird eine besonders sichere Befestigung in dem Formkörper erreicht.According to a further embodiment of the invention, it is advantageous to design the holding device in the shape of a truncated cone, the tapered end of the holding device being fastened to the disk. This design will preferably be selected if the disc is arranged in the cylinder head near an opening such as an intake port, exhaust port or cooling space. In this case, the disc is fastened in the mandrel with the frustoconical holding device. The diameter of the holding device in the section cast by the cylinder head is expediently smaller than the later bore diameter. It may also be expedient to combine the cylindrical design of the holding device with the frustoconical design, for example, as described above, to form the holding device along the bore to be made later for the cylinder head screw as a cylindrical pin and in the area in which the holding device in the Shaped body is attached to end in a truncated cone. A particularly secure attachment in the molded body is thereby achieved.

Weitere Merkmale der Erfindung ergeben sich aus der Beschreibung und der Zeichnung, in der Ausführungsbeispiele der Erfindung dargestellt sind und im folgenden näher beschrieben sind.Further features of the invention result from the description and the drawing, in which exemplary embodiments of the invention are shown and are described in more detail below.

Es zeigt:

  • Fig. 1 einen Schnitt durch einen fertigen Zylinderkopf mit eingesetzten Zylinderkopfschrauben,
  • Fig. 2 einen Schnitt durch den Zylinderkopf nach dem und 3 Gießvorgang, wobei unterschiedliche Ausführungen der Haltevorrichtungen dargestellt sind.
It shows:
  • 1 shows a section through a finished cylinder head with inserted cylinder head screws,
  • Fig. 2 shows a section through the cylinder head after and 3 casting process, different versions of the holding devices are shown.

In einen Zylinderkopf 1, der vorzugsweise aus Leichtmetall gegossen ist, sind Scheiben 2 und 3 angeordnet, die die von den Zylinderkopfschrauben 4 zu übertragenden Zugkräfte gleichmäßig in den Zylinderkopf 1 einleiten. Die Scheiben 2 und 3 sind auf ihren von den Zylinderkopfschraubenköpfen 4a abgewandten Seiten mit einem größeren Durchmesser 2a und 3a versehen, als auf den zu den Zylinderkopfschraubenköpfen 4a weisenden Seiten 2b und 3b. Die Scheiben 2 und 3 sind auf den Seiten 2b und 3b mit im rechten Winkel zu den Bohrungen 5 und 6 stehenden bearbeiteten Ausnehmungen 7 und 8 versehen. Die Ausnehmungen 7 und 8, die zusammen mit den Bohrungen 5 und 6 durch die Öffnungen 9 und 10 angebracht werden können, gewährleisten eine verzugsfreie Kraftübertragung von den Zylinderkopfschrauben 4 auf die Scheiben 2 und 3 und somit auf den Zylinderkopf 1. Die im Bereich eines Gaswechselkanals 11 angeordnete Öffnung 10 wird nach erfolgter Montage der Zylinderkopfschrauben 4 von einem Deckel 12 verschlossen. Die Öffnung 9 kann bei dem hier dargestellten luftgekühlten Zylinderkopf offen bleiben. Soll der Raum 13 der sich zwischen der Öffnung 9 und der Scheibe 2 erstreckt, bei einem flüssigkeitsgekühlten Zylinderkopf 1 als kühlmitteldurchströmter Raum 13 benutzt werden, so wird die Öffnung 9 analog zu der Öffnung 10 mit einem Stopfen verschlossen.In a cylinder head 1, which is preferably cast from light metal, disks 2 and 3 are arranged, which uniformly introduce the tensile forces to be transmitted by the cylinder head screws 4 into the cylinder head 1. The disks 2 and 3 are provided on their sides facing away from the cylinder head screw heads 4a with a larger diameter 2a and 3a than on the sides 2b and 3b facing the cylinder head screw heads 4a. The disks 2 and 3 are provided on the sides 2b and 3b with machined recesses 7 and 8 at right angles to the bores 5 and 6. The recesses 7 and 8, which can be made together with the bores 5 and 6 through the openings 9 and 10, ensure distortion-free power transmission from the cylinder head screws 4 to the washers 2 and 3 and thus to the cylinder head 1. The in the area of a gas exchange channel 11 arranged opening 10 is closed by a cover 12 after installation of the cylinder head screws 4. The opening 9 can remain open in the air-cooled cylinder head shown here. If the space 13 which extends between the opening 9 and the disc 2 is to be used as a coolant-flowed space 13 in a liquid-cooled cylinder head 1, the opening 9 is closed in a manner analogous to the opening 10 with a stopper.

Die Figuren 2 und 3 zeigen den Zylinderkopf 1 unmittelbar nach dem Gießvorgang. Dabei ist in Fig. 2 eine Ausführungsform der Scheiben 2' und 3' mit je einem angegossenen zylindrischen Stift 14 und 15 dargestellt. Dabei erstrekken sich die beiden Stifte 14 und 15 entlang den später anzubringenden Bohrungen 5' und 6' und sind in dem nicht weiter dargestellten Formkörper fixiert. In Fig. 3 ist ein Zylinderkopf 1" mit eingegossenen Scheiben 2" und 3" dargestellt, wobei in diesem Ausführungsbeispiel die Haltevorrichtungen als kegelstumpfförmig ausgebildete Haltevorrichtungen 16 und 17 dargestellt sind. Die kegelstumpfförmig ausgebildeten Haltevorrichtungen 16 und 17 weisen mit ihrem sich verdickenden Ende in den Raum 13" bzw. in den Gaswechselkanal 11" und sind während des Gießvorgangs in dem nicht dargestellten Formkern festgelegt. Dabei weisen die kegelstumpfförmig erweiterten Enden der Haltevorrichtungen 16 und 17 einen größeren Durchmesser auf als die nachträglich anzubringenden Bohrungen 5" bzw. 6".Figures 2 and 3 show the cylinder head 1 immediately after the casting process. 2 shows an embodiment of the disks 2 'and 3', each with a cast-on cylindrical pin 14 and 15. The two pins 14 and 15 extend along the bores 5 'and 6' to be made later and are fixed in the shaped body (not shown). 3 shows a cylinder head 1 "with cast-in disks 2" and 3 ", wherein in this exemplary embodiment the holding devices are shown as frustoconical holding devices 16 and 17. The frustoconical holding devices 16 and 17 point with their thickening ends in the Space 13 "or in the gas exchange channel 11" and are fixed during the casting process in the mandrel, not shown. The frustoconically widened ends of the holding devices 16 and 17 have a larger diameter than the bores 5 "or 6" to be retrofitted.

Claims (5)

1. A method of casting-in inserts into a cylinder head (1, 1', 1"), in which holes (5, 5', 5") each serving to accommodate a respective cylinder head cap screw (4) are to be worked into the cylinder head (1, 1', 1") and into the inserts, in which each hole is provided with its respective insert, in which each insert is located at the respective hole's end facing the cap of the screw to be accommodated therein, is arranged substantially coaxially with the hole's axis, is made of a material different from that of the cylinder head (1, 1', 1"), and in which the cylinder head (1, 1', 1 "), when being cast, will be cast around at least a part of each insert, characterized in that holding devices, one for each insert and securing the latter in a moulding box, extend along the direction of the respective holes (5, 5', 5") to be bored subsequently, and in that at least a section of each holding device has a diameter smaller than that of the respective hole so that, when the cylinder head is machined thereafter, each device will completely be bored out.
2. A method according to claim 1, characterized in that the holding device is fastened centrally to the respective insert which is a disc (2,2', 2", 3,3', 3").
3. A method according to claim 1 or claim 2, characterized in that the disc (2, 2', 2", 3, 3', 3") and the respective holding device are made as a one-part component.
4. A method according to any of the claims 1 to 3, characterized in that the or each holding device is a cylindrical pin (14, 15).
5. A method according to any of the claims 1 to 3, characterized in that the or each holding device is shaped like a truncated cone and is fastened at its small end face to the respective disc (2, 2', 2", 3, 3' 3").
EP86105411A 1985-04-19 1986-04-18 Method of casting in of inserts in a cylinder head Expired - Lifetime EP0199311B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86105411T ATE55808T1 (en) 1985-04-19 1986-04-18 PROCEDURE FOR CASTING INSERTS INTO A CYLINDER HEAD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3514121 1985-04-19
DE19853514121 DE3514121A1 (en) 1985-04-19 1985-04-19 CYLINDER HEAD WITH INSERTS IN THE AREA OF THE CYLINDER HEAD SCREW HOLES

Publications (3)

Publication Number Publication Date
EP0199311A2 EP0199311A2 (en) 1986-10-29
EP0199311A3 EP0199311A3 (en) 1987-12-09
EP0199311B1 true EP0199311B1 (en) 1990-08-22

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EP86105411A Expired - Lifetime EP0199311B1 (en) 1985-04-19 1986-04-18 Method of casting in of inserts in a cylinder head

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AT (1) ATE55808T1 (en)
DE (2) DE3514121A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2691656B1 (en) * 1992-05-26 1997-03-21 Renault PROCESS FOR PRODUCING A SUPPORT ARM, PARTICULARLY FOR A WIPER BLADE HOLDER.
US6123055A (en) * 1998-02-25 2000-09-26 Isuzu Motors Limited Cylinder head structure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE940075C (en) * 1950-10-17 1956-03-08 Kloeckner Humboldt Deutz Ag Air-cooled cylinder head made of light metal for internal combustion engines
DE1129765B (en) * 1960-08-11 1962-05-17 Motoren Werke Mannheim Ag Attachment of a combustion chamber body to an air-cooled cylinder head
US4100669A (en) * 1975-03-03 1978-07-18 Pemper Steven J Casting process

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DE3673546D1 (en) 1990-09-27
EP0199311A2 (en) 1986-10-29
ATE55808T1 (en) 1990-09-15
EP0199311A3 (en) 1987-12-09
DE3514121A1 (en) 1986-10-23

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