EP3024607B1 - Dispositif et procédé de fonderie - Google Patents

Dispositif et procédé de fonderie Download PDF

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Publication number
EP3024607B1
EP3024607B1 EP14738472.1A EP14738472A EP3024607B1 EP 3024607 B1 EP3024607 B1 EP 3024607B1 EP 14738472 A EP14738472 A EP 14738472A EP 3024607 B1 EP3024607 B1 EP 3024607B1
Authority
EP
European Patent Office
Prior art keywords
manufactured
component
cylinder head
displacement element
die casting
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.)
Active
Application number
EP14738472.1A
Other languages
German (de)
English (en)
Other versions
EP3024607A1 (fr
Inventor
Andreas Fent
Hubert Lang
Richard Schächtl
Marcus STIER
Thomas Summer
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP3024607A1 publication Critical patent/EP3024607A1/fr
Application granted granted Critical
Publication of EP3024607B1 publication Critical patent/EP3024607B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/101—Permanent cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/065—Cooling or heating equipment for moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
    • B22D27/11—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of mechanical pressing devices

Definitions

  • the invention relates to a casting apparatus and a casting method for producing or finishing a cylinder head.
  • the feeder system serves to compensate for the shrinkage of the casting during cooling and to avoid voids inside the solidifying casting.
  • the feeder system When producing a cylinder head of a four-cylinder engine, the feeder system has a melt volume of about 14 kg, with 6-cylinder cylinder heads a melt volume of about 20 kg.
  • the Large amount of melt volume is therefore necessary to ensure that the melt in the feeder is still liquid when the component to be finished is finished. As a result, it is always possible to ensure compensation of the shrinkage via the feeder system.
  • the feed system is conventionally surrounded by the sandpit core and is thereby thermally insulated
  • a casting device for the production of components, in particular cylinder heads provided with a liftable from the component to be manufactured and reusable steel core, which is a movable, in the component to be manufactured having depressible displacement element.
  • the sandbox core with integrated feeder system used in the prior art method is completely substituted by the steel core.
  • a feeder system in the context of the prior art becomes obsolete.
  • the steel core is used instead of the previously used Sanddeckkerns placed on the component to be manufactured and forms its surface contour in the negative.
  • a displacer element is pressed into the not yet solidified component to be manufactured (melt), whereby the volume of the displacer element is displaced to melt.
  • This displaced melt volume serves as a substitute for the melt otherwise fed via the feeders. Dense feeding thus takes place with melting material, which is originally provided by the component to be manufactured itself. In this case it can be provided to provide a minimally increased machining allowance of melt material on the upper flange surfaces.
  • the displacement element is arranged at a position of the steel core, which correlates with a position of the component to be manufactured, which forms a recess in a final state of the component to be manufactured.
  • the impressions of the displacer in the component to be manufactured is thus simultaneously a production step of a recess in the component to be manufactured.
  • the position of the displacer corresponds to the position of the spark plug well of the cylinder head. The number of displacement in such a case depends on the number of cylinders to the cylinder head.
  • the displacer is designed as a movable steel pin which is pressed into the melt of the cylinder head and generates a cylindrical recess there.
  • the displacement element is equipped with a cooling device and / or heating device.
  • the Cooling device is designed to pass on the displacement element air, water or oil as a coolant, for example, over internal channels to cool it.
  • a heating device a heating cartridge is integrated in the displacer element in a possible embodiment.
  • Also part of the invention is a method for the production of a cylinder head in the casting process, wherein on the component to be lifted off and reusable steel core is used as a substitute for a Sandeckkern having a displacer, which is pressed for feeding in a melt, the solidified in the Condition forms the cylinder head.
  • the displacement element is first pressed into the cylinder head after the melt has cooled down to the extent that it has formed an outer skin. This is favorable because a wall shell is present on the sand core and not the melt is pressed into the sand core of the cylinder head.
  • the advantages of the device according to the invention and of the method according to the invention are, in particular, that the hitherto necessary sand core with integrated feeder system is completely replaced by a single steel core core.
  • the steel core according to the invention can be integrated into the casting plant, reusable and lifted off the component to be manufactured.
  • the feeder volume provided by the component to be manufactured itself is equivalent to only 10-15% of the original volume previously provided in feeders. Due to the reduced melt volume, a faster solidification and shorter cycle times occur. When using the space that is displaced by the displacer (for example, as a spark plug well), a subsequent chip process can be avoided become.
  • FIG. 1 a cylinder head 21 with feeder system 20 arranged thereon is shown in a perspective view.
  • the feeder system here for a four-cylinder engine, contains the melt, which compensates for the shrinkage of the solidifying component and ensures the supply of gas.
  • the feeder system 20 is surrounded by a sand cover core, not shown, which forms the upper end surface for the cylinder head 21 and receives the feeder system 20.
  • the sandpit core and feeder system 20 have considerable volume and weight.
  • FIG. 2 the casting device 10 according to the invention is shown in a side sectional view, with components that are not relevant to the invention are omitted.
  • the casting apparatus 10 has a steel core 1 that can be lifted off and reused by the cylinder head 2, through which a plurality of displacement elements 3 designed as steel pins extend.
  • the displacement elements 3 are movable and can be pressed by a control device 7 at a predetermined time and with a predetermined duck into the cylinder head.
  • a predetermined time means in this case that the melt of the cylinder head may not yet solidified, so that the penetrating displacer 3 leads to a displacement of melt.
  • the surplus of melt obtained by the displacement is distributed essentially over the entire cylinder head 2 and that as density feed.
  • the feeder system 20 off FIG. 1 is thus obsolete.
  • FIG. 3 is the pouring device 10 from FIG. 2 shown in perspective view.
  • the steel core 1 can be seen from its lower, the cylinder head 2 side facing.
  • the position of the displacement elements 3 is chosen such that they correlate with positions of the cylinder head 2, which in each case form the spark plug shaft in the finished state.
  • the steel core 1 has a plurality of projections 4 on its surface facing the cylinder head 2, which form a cavity in the finished state of the cylinder head 2.
  • the surface geometry of the steel core 1 can thus be selected to form a negative of the component to be manufactured, in this case the cylinder head 2.
  • FIG. 4 shows a perspective view of a cylinder head 2, with the correlating to the displacement elements 3 positions 5, which form the spark plug shaft in the cylinder head 2.
  • the basic shape shown is poured as usual.
  • the feeder system 20 FIG. 1 but used in the steel core 1 integrated displacer 3 is pressed into the partially solidified melt of the cylinder head 2.
  • the casting apparatus 10 closes the component to be manufactured tightly with the steel core 1, so that the internal pressure rises due to the pressing in of the displacement elements 3, whereby the material disappearing during the melt is compensated.
  • the steel core can be lifted and the component, in this case the cylinder head 2 are removed.
  • an additional feeder system 9 is still used on a component to be manufactured, in particular in areas which are not in direct fluid communication with the positions 5. That is, in areas that can not be reached by the displaced melt material, an additional feeder system 9 may well be arranged. However, this is according to its volume and weight compared to the feeder systems according to FIG. 1 minimal.
  • the invention is not limited in its execution to the above-mentioned preferred embodiment. Rather, it is a number of variants conceivable, which makes use of the illustrated solution also of fundamentally different types.
  • the displacer does not have to form a spark plug well, but can free other, desired in the component to be machined recesses.

Claims (10)

  1. Dispositif de coulée par gravité permettant la fabrication de pièces, en particulier de culasses (2) comportant un noyau supérieur en acier (1) pouvant être extrait de la pièce à fabriquer et réutilisé, servant de substitut de noyau de couverture en sable, formant en négatif le contour de surface de la pièce à fabriquer, et comportant un élément de déplacement (3) mobile pouvant être enfoncé dans la pièce à fabriquer.
  2. Dispositif de coulée par gravité conforme à la revendication 1,
    caractérisé en ce que
    l'élément de déplacement (3) est situé dans une position du noyau supérieur en acier qui correspond à une position de la pièce à fabriquer qui forme un évidement à l'état final.
  3. Dispositif de coulée par gravité permettant la fabrication de culasses conforme à au moins l'une des revendications principales,
    caractérisé en ce que
    la position de l'élément de déplacement (3) correspond à la position du puits des bougies d'allumage de la culasse (2).
  4. Dispositif de coulée par gravité conforme à au moins l'une des revendications précédentes,
    caractérisé en ce que
    l'élément de déplacement (3) est réalisé sous la forme d'une broche en acier mobile.
  5. Dispositif de coulée par gravité conforme à au moins l'une des revendications précédentes,
    caractérisé en ce que
    la surface tournée vers la pièce à fabriquer comporte au moins une saillie (4).
  6. Dispositif de coulée par gravité conforme à au moins l'une des revendications précédentes,
    caractérisé en ce que
    l'élément de déplacement (3) comporte un dispositif de refroidissement et/ou un dispositif de chauffage.
  7. Procédé de fabrication d'une culasse par coulée par gravité, selon lequel un noyau supérieur en acier (1) pouvant être extrait de la pièce à fabriquer et réutilisé, qui forme en négatif le contour de surface de la pièce à fabriquer est utilisé en tant que substitut d'un noyau de couverture en sable, le noyau supérieur en acier (1) comprenant un élément de déplacement (3) qui est enfoncé dans une masse fondue qui forme la culasse à l'état fini pour permettre une alimentation étanche.
  8. Procédé conforme à la revendication 7,
    caractérisé en ce que
    l'élément de déplacement (3) est enfoncé dans la culasse (2) après que la masse fondue ait été suffisamment refroidie pour former une peau extérieure.
  9. Procédé conforme à au moins l'une des revendications précédentes 7 et 8,
    caractérisé en ce que
    l'élément de déplacement (3) est réalisé sous la forme d'une broche en acier et est enfoncé dans la culasse à fabriquer dans une position qui forme le puits des bougies d'allumage.
  10. Procédé conforme à au moins l'une des revendications précédentes 7 à 9,
    caractérisé en ce que
    l'élément de déplacement (3) est refroidi et/ou chauffé.
EP14738472.1A 2013-07-25 2014-07-08 Dispositif et procédé de fonderie Active EP3024607B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013214534.9A DE102013214534B4 (de) 2013-07-25 2013-07-25 Gießvorrichtung und Gießverfahren
PCT/EP2014/064528 WO2015010886A1 (fr) 2013-07-25 2014-07-08 Dispositif et procédé de fonderie

Publications (2)

Publication Number Publication Date
EP3024607A1 EP3024607A1 (fr) 2016-06-01
EP3024607B1 true EP3024607B1 (fr) 2018-02-28

Family

ID=51176370

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14738472.1A Active EP3024607B1 (fr) 2013-07-25 2014-07-08 Dispositif et procédé de fonderie

Country Status (5)

Country Link
US (1) US10618105B2 (fr)
EP (1) EP3024607B1 (fr)
CN (1) CN105246617B (fr)
DE (1) DE102013214534B4 (fr)
WO (1) WO2015010886A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017211876B3 (de) * 2017-07-12 2018-08-16 Bayerische Motoren Werke Aktiengesellschaft Kokille sowie Verfahren zum Herstellen eines Bauteils
CN110640097B (zh) * 2019-09-16 2020-11-27 溧阳市新明机械配件制造有限公司 一种方便控制下料量的砂芯制作用脱料装置
CN116079007B (zh) * 2023-04-07 2023-06-09 蓬莱金创精密铸造有限公司 一种用于汽车排气接头的铸造模具及制造工艺

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Also Published As

Publication number Publication date
CN105246617B (zh) 2019-07-16
DE102013214534B4 (de) 2021-07-01
EP3024607A1 (fr) 2016-06-01
WO2015010886A1 (fr) 2015-01-29
US10618105B2 (en) 2020-04-14
DE102013214534A1 (de) 2015-01-29
CN105246617A (zh) 2016-01-13
US20160038995A1 (en) 2016-02-11

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