EP2727668B1 - Method for producing a cylinder crankcase and casting assembly for a cylinder crankcase - Google Patents
Method for producing a cylinder crankcase and casting assembly for a cylinder crankcase Download PDFInfo
- Publication number
- EP2727668B1 EP2727668B1 EP13190037.5A EP13190037A EP2727668B1 EP 2727668 B1 EP2727668 B1 EP 2727668B1 EP 13190037 A EP13190037 A EP 13190037A EP 2727668 B1 EP2727668 B1 EP 2727668B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- bridge
- cylinder
- metal support
- water jacket
- 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
Links
- 238000005266 casting Methods 0.000 title claims description 36
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000011162 core material Substances 0.000 claims description 114
- 229910052751 metal Inorganic materials 0.000 claims description 46
- 239000002184 metal Substances 0.000 claims description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 18
- 239000002826 coolant Substances 0.000 claims description 16
- 229910000838 Al alloy Inorganic materials 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims 4
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 description 11
- 238000003384 imaging method Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000003110 molding sand Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
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
- B22C9/106—Vented or reinforced cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/12—Accessories
- B22C21/14—Accessories for reinforcing or securing moulding materials or cores, e.g. gaggers, chaplets, pins, bars
-
- 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
- B22D19/0009—Cylinders, pistons
Definitions
- the invention has for its object to provide a method for manufacturing and a mold assembly for a cylinder crankcase made of aluminum or aluminum alloy, can pour with or with the compact combustion engines while avoiding the use of conventional sand cores expected disadvantages, with a high productivity in the production should be achievable.
- the invention is based on the consideration that with a view to a quick and uncomplicated demolding of the solidified casting of aluminum or a Aluminum alloy conventional bonded core sands continue to be the core materials of choice, however, they show strength and stability problems when forming particularly narrow webs, such as the load from the molten aluminum or aluminum alloy molten metal entering the mold. These disadvantages can be avoided by the use of web cores embedded in the at least partially metal support for stabilization against the inflowing molten metal, wherein the metal support consist of the same or a related material as the cast material itself.
- the use of aluminum or an aluminum alloy for the web plate leads to the fact that during casting all exposed metal areas are liquefied by the light metal melt, and, as it were in the melt after their solidification with rise.
- the Fig. 1 shows an overview of a multi-part mold assembly 1 for producing a cylinder crankcase made of aluminum or an aluminum alloy.
- the exterior of the cylinder crankcase here one Internal combustion engine with arrangement of the individual cylinder chambers in series and optionally also in V or W-shape is formed by a casting mold 3 arranged in a casting frame for the casting process.
- a casting mold 3 arranged in a casting frame for the casting process.
- corresponding cylinder cores 5 are arranged in the outer mold 3.
- the cylinder cores 5 can axially, ie be retractable along their axis L in the mold 3 quills made of metal, which are cooled during the casting process from the inside to improve their mold release after cooling of the aluminum melt.
- a single-part or multi-part water jacket core 10 made of molding sand is also placed in the casting mold 3.
- the water jacket core 10 depicts those regions in the cylinder crankcase which remain free after the casting, so as to allow a flushing of the cylinder crankcase with cooling fluid in the internal combustion engine and thus the dissipation of the heat generated during the combustion process.
- the finished casting arrangement 1 additionally has web cores 20 arranged transversely to the row of cylinders between respectively adjacent cylinder cores 5.
- the cavities created by these web cores 20 allow the cooling medium to flow also in the intermediate wall between adjacent cylinders.
- the space available for this purpose is severely limited, since in modern internal combustion engines, the tendency is to reduce as far as possible to reduce the overall construction length and the distance A between successive cylinder recesses.
- a coolant duct is to be accommodated on this small distance A, whose flow cross-section should also not be too low in view of a sufficient coolant throughput.
- the first boundary edge 21 of the web core 20 is embedded directly into the one wall of the water jacket core 10, however, the second boundary edge 22 is not attached directly in the opposite wall, but attached to this only indirectly, namely an additional component in shape Alternatively, of course, it is also possible to embed the other, ie the second boundary edge 22 directly into the corresponding wall of the water jacket core 10.
- boundary edges 21, 22 are to be understood as meaning those two edges of the web core 20 which run essentially parallel to the longitudinal axes L of the cylinder recesses and bound the length of the web core 20 in the circumferential direction of the adjacent cylinder recesses.
- Fig. 1 as well as the Fig. 2 as an enlarged detail show that the thickness B of the web core 20 between its first boundary edge 21 and its second boundary edge 22 is not uniform, but varies.
- the cross-sectional configuration is equal to the section through a concave lens, wherein the smallest thickness B1 is on the connecting line 31 of the longitudinal axes L of the two adjacent cylinder recesses.
- the design of the web core 20 is such that no coolant flow takes place from the one side of the water jacket on the other side in the later internal combustion engine, but instead a deflection flow takes place in the form of a loop.
- the web core 20 is formed similar to a ring and encloses a disposed between the two boundary edges 21, 22 opening 30.
- the axis 31 of the opening 30 preferably extends on the connecting line 31 of the two adjacent cylinder recesses.
- Fig. 4 is illustrated by flow arrows, the flow in the formed by the web core 20, later coolant channel.
- the flow can, depending on the specific geometric and thermodynamic boundary conditions, also take place in the reverse direction.
- the web core 20 consists primarily of a typical core material, for. B. from a mixed with organic or inorganic binders molding sand. However, an exclusively trained web core would not have sufficient stability over that during the Casting process inflowing molten metal. For this reason, each web core 20 is reinforced to increase its strength, and this provided with a partially embedded in the web core 20 metal carrier.
- the Fig. 3 shows the bridge core 20 including the metal carrier 25 disposed therein.
- the metal carrier 25 which can also be referred to as a web plate, is manufactured separately in advance, preferably by punching from a material sheet having a sheet thickness of 0.5-2 mm, preferably 0.5-1 mm and more preferably 0.8 mm.
- the use of aluminum or an aluminum alloy for the web plate 25 means that during casting all exposed metal areas are liquefied by the light metal melt, and rise as it were in the melt after their solidification.
- the metal carrier 25 is only partially embedded in the core material of the web core 20. During the solidification process exposed areas of the metal carrier 25 in the solidifying molten aluminum and thus become part of the casting.
- the end portion of the metal carrier 25 is blank and is included in the production of the water jacket core 10 in this, whereby it comes in the water jacket core 10 to a fixation of the metal carrier 25 and thus also of the web core 20.
- the formation of the web cores 20 takes place in a core box 40.
- the web cores 20 are formed in pairs, wherein the first boundary edges 21 are arranged facing each other.
- the core box 40 provides space for a total of three such pairs.
- a metal carrier 25 is first placed in the correct position.
- the injection of sand mixed with organic or inorganic binders takes place via a two opening cores of a pair of web core associated bullet opening 41.
- the bullet opening 41 leads via a branch 42 to the two mold cavities 45 for the web core pair.
- the core material fed into the core box via the injection openings 41 therefore passes via the branch 42 into the mold spaces 45 extending on both sides, wherein the mold space 45 has its largest cross-sectional area in the region of the confluence coming from the injection opening 41 or the branch 42.
- This largest cross-sectional area forms the first boundary edge 21 of the web core 20 and thus that region of the later coolant channel, via which the supply and removal of the coolant takes place.
- the portion of the metal carrier 25 facing away from the injection opening 41 is fixed in the core mold, while the portion of the metal carrier facing the injection opening 41 protrudes freely into the mold space 45.
- the paired web cores 20 can be removed therefrom. These are separated in the region of their first boundary edge 21 of the branch 42, and then as described in the mutually facing inner walls of the water jacket core 10 (FIG. Fig. 1 ) embedded.
Description
Die Erfindung betrifft zunächst ein Verfahren zum Herstellen eines Zylinderkurbelgehäuses aus Aluminium oder einer Aluminiumlegierung, bei dem, vor dem Einfüllen der Metallschmelze, in einer das Äußere des Zylinderkurbelgehäuses formenden Gießform angeordnet werden:
- Zylinderkerne für die Ausbildung der Zylinderausnehmungen,
- wenigstens ein die Kühlkanäle des Zylinderkurbelgehäuses ausbildender Wassermantelkern, wobei zur Ausbildung zusätzlicher, zwischen den benachbarten Zylinderausnehmungen angeordneter Kühlmittelkanäle separat gefertigte Stegkerne innen an dem Wassermantelkern befestigt, und während des anschließenden Gießens von der Metallschmelze umschlossen werden.
- Cylinder cores for the formation of the cylinder recesses,
- at least one of the cooling channels of the cylinder crankcase forming water jacket core, wherein to form additional, arranged between the adjacent cylinder recesses coolant channels separately manufactured web cores mounted inside the water jacket core, and are enclosed during the subsequent casting of the molten metal.
Die Erfindung betrifft ferner eine Gießformanordnung für ein Zylinderkurbelgehäuse aus Aluminium oder einer Aluminiumlegierung, bei der in einer das Äußere des Zylinderkurbelgehäuses abbildenden Gießform angeordnet sind:
- Zylinderkerne zur Abbildung der späteren Zylinderausnehmungen,
- wenigstens ein die späteren Kühlkanäle des Zylinderkurbelgehäuses abbildender Wassermantelkern, wobei zur Abbildung zwischen den benachbarten Zylinderausnehmungen angeordneter Kühlmittelkanäle separate Stegkerne innen an dem Wassermantelkern befestigt sind.
- Cylinder cores for imaging the later cylinder recesses,
- at least one of the later cooling channels of the cylinder crankcase imaging water jacket core, wherein for imaging between the adjacent cylinder recesses arranged coolant channels separate web cores are secured inside the water jacket core.
Um die Baulänge eines aus Leichtmetall und insbesondere aus Aluminium oder einer Aluminiumlegierung gegossenen Motorblocks gering zu halten, ist man bestrebt, die Zylinderausnehmungen der jeweiligen Zylinderreihe eng beieinander anzuordnen, d. h. mit entsprechend dünnwandigen Zylinderzwischenwänden zu arbeiten. Diese Zwischenwände unterliegen, vor allem bei modernen, mit hohen spezifischen Leistungen arbeitenden Verbrennungsmotoren durch die eng beieinanderliegenden Brennräume und die Wärmeentwicklung einer erhöhten thermischen Belastung. Diese Belastung wiederum macht es erforderlich, auch in den schmalen Zylinderzwischenwänden der Zylinderreihe Kühlmittelkanäle vorzusehen. Deren Unterbringung bereitet in der Praxis Schwierigkeiten. So gibt es im Stand der Technik zwar Bemühungen, dort mit Hilfe von nachträglich eingefügten Bohrlöchern Öffnungen für den Kühlwassertransport zu schaffen. Wegen der ohnehin geringen Wanddicken ist diese Möglichkeit jedoch nicht immer praktikabel, zudem ist die thermische Wirksamkeit bei vielen Anwendungen nicht optimal.In order to keep the overall length of an engine block cast from light metal and in particular made of aluminum or an aluminum alloy low, it is endeavored to arrange the cylinder recesses of the respective row of cylinders closely to one another, ie to work with correspondingly thin-walled cylinder partition walls. These partitions are subject, especially in modern, with high specific power combustion engines by the closely spaced combustion chambers and the heat of an increased thermal load. This load in turn makes it necessary to provide coolant channels even in the narrow cylinder partitions of the cylinder bank. Their placement is difficult in practice. Thus, although there are efforts in the prior art, there to create openings for the cooling water transport there with the help of subsequently inserted wells. Because of the anyway However, this possibility is not always practical with small wall thicknesses, and the thermal effectiveness is not optimal in many applications.
Aus der
Aus der
Ein Aluminiumguss betreffendes Verfahren und eine Gießformanordnung mit den Merkmalen des Oberbegriffs ist aus der
Auch aus der
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Herstellen und eine Gießformanordnung für ein Zylinderkurbelgehäuse aus Aluminium oder einer Aluminiumlegierung zu schaffen, mit dem bzw. mit der sich kompakt bauende Verbrennungsmotoren unter Vermeidung der bei Verwendung üblicher Sandkerne zu erwartenden Nachteile gießen lassen, wobei eine hohe Produktivität bei der Herstellung erzielbar sein soll.The invention has for its object to provide a method for manufacturing and a mold assembly for a cylinder crankcase made of aluminum or aluminum alloy, can pour with or with the compact combustion engines while avoiding the use of conventional sand cores expected disadvantages, with a high productivity in the production should be achievable.
Gelöst wird diese Aufgabe durch die Merkmale der Patentansprüche 1 betreffend das Verfahren und 9 betreffend die Gießformanordnung.This object is achieved by the features of
Die Erfindung geht von der Überlegung aus, dass im Hinblick auf eine schnelle und komplikationslose Entformung des erstarrten Gussteils aus Aluminium oder einer Aluminiumlegierung herkömmliche, gebundene Kernsande weiterhin die Kernwerkstoffe erster Wahl sind, sie allerdings beim Formen besonders schmaler Stege Festigkeits- und Stabilitätsprobleme zeigen, etwa gegenüber der Belastung durch die in die Gussform einschießende Metallschmelze aus Aluminium oder einer Aluminiumlegierung. Diese Nachteile lassen sich vermeiden durch die Verwendung von Stegkernen in die zur Stabilisierung gegenüber der zufließenden Metallschmelze zumindest bereichsweise Metallträger eingebettet sind, wobei die Metallträger aus demselben oder einem verwandten Werkstoff wie der Gusswerkstoff selbst bestehen. Die Verwendung von Aluminium oder einer Aluminiumlegierung für das Stegblech führt dazu, dass beim Guss alle offenliegenden Metallbereiche durch die Leichtmetallschmelze verflüssigt werden, und gleichsam in der Schmelze nach deren Erstarrung mit aufgehen.The invention is based on the consideration that with a view to a quick and uncomplicated demolding of the solidified casting of aluminum or a Aluminum alloy conventional bonded core sands continue to be the core materials of choice, however, they show strength and stability problems when forming particularly narrow webs, such as the load from the molten aluminum or aluminum alloy molten metal entering the mold. These disadvantages can be avoided by the use of web cores embedded in the at least partially metal support for stabilization against the inflowing molten metal, wherein the metal support consist of the same or a related material as the cast material itself. The use of aluminum or an aluminum alloy for the web plate leads to the fact that during casting all exposed metal areas are liquefied by the light metal melt, and, as it were in the melt after their solidification with rise.
Mit diesem Verfahren bzw. mit dieser Gießformanordnung lassen sich kompakt bauende Verbrennungsmotoren ohne die bei Verwendung von Sandkernen zu beachtenden Beschränkungen gießen, wobei eine hohe Produktivität bei der Herstellung erzielbar ist. Zur Bildung zusätzlicher Kühlmittelkanäle zwischen benachbarten Zylinderausnehmungen ist es auch nicht erforderlich, durch eine spanabhebende Bearbeitung in das Erstarrungsgefüge des Gussmaterials einzugreifen.With this method or with this casting mold arrangement, it is possible to cast compact internal combustion engines without the restrictions to be observed when using sand cores, with it being possible to achieve high productivity in the production. To form additional coolant channels between adjacent cylinder recesses, it is also not necessary to intervene by a machining in the solidification structure of the casting material.
Vorteilhafte Ausgestaltungen erschließen sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels, wobei auf die Zeichnungen Bezug genommen wird. Darin zeigen:
- Fig. 1
- einen Teilschnitt durch eine erfindungsgemäße Gießformanordnung zum Gießen eines Zylinderkurbelgehäuses;
- Fig. 2
- das Detail II der
Fig. 1 in vergrößertem Maßstab; - Fig. 3
- in einer Ansicht einen in der Gießformanordnung verwendeten Stegkern mit darin teils eingebettetem Metallträger;
- Fig. 4
- eine der
Fig. 3 vergleichbare Ansicht, diesmal des durch den Stegkern erzeugten Hohlraums sowie dessen Durchströmung; - Fig. 5
- eine Draufsicht auf einen geöffneten Kernkasten zur gleichzeitigen Herstellung einer Mehrzahl an Stegkernen und
- Fig. 6
- einen Schnitt entsprechend der Schnittebene VI - VI in
Fig. 5 .
- Fig. 1
- a partial section through a mold assembly according to the invention for casting a cylinder crankcase;
- Fig. 2
- the detail II of the
Fig. 1 on an enlarged scale; - Fig. 3
- in a view of a web core used in the mold assembly with therein partially embedded metal carrier;
- Fig. 4
- one of the
Fig. 3 comparable view, this time of the cavity produced by the web core and its flow; - Fig. 5
- a plan view of an open core box for simultaneously producing a plurality of web cores and
- Fig. 6
- a section corresponding to the section plane VI - VI in
Fig. 5 ,
Die
Für die Ausbildung der Kühlkanäle des Motorblocks wird in der Gießform 3 ferner ein ein- oder mehrteiliger Wassermantelkern 10 aus Formsand platziert. Der Wassermantelkern 10 bildet jene Bereiche im Zylinderkurbelgehäuse ab, die nach dem Abguss freibleiben, um so im Verbrennungsmotor eine Durchspülung des Zylinderkurbelgehäuses mit Kühlflüssigkeit und damit die Abführung der beim Verbrennungsprozess entstehenden Wärme zu ermöglichen.For the formation of the cooling channels of the engine block, a single-part or multi-part
Bei hochbelasteten Verbrennungsmotoren und insbesondere bei Dieselmotoren mit Turboaufladung ist zur Vermeidung einer zu hohen thermischen Belastung im Motorbetrieb eine zusätzliche Kühlung des Bereichs zwischen jeweils benachbarten Zylinderräumen erforderlich. Zum Formen bzw. Abbilden entsprechender Kühlmittelkanäle verfügt die fertige Gießformanordnung 1 zusätzlich über quer zur Zylinderreihe angeordnete Stegkerne 20 zwischen jeweils benachbarten Zylinderkernen 5. Beim Betrieb des Verbrennungsmotors ermöglichen die durch diese Stegkerne 20 geschaffenen Hohlräume ein Strömen des Kühlmediums auch in der Zwischenwandung zwischen benachbarten Zylindern. Der hierfür zur Verfügung stehende Platz ist allerdings stark eingeschränkt, nachdem bei modernen Verbrennungsmotoren die Tendenz dahin geht, zur Reduzierung der Gesamtbaulänge auch den Abstand A zwischen aufeinanderfolgenden Zylinderausnehmungen soweit als möglich zu verkleinern. Zugleich soll auf diesem geringen Abstand A ein Kühlmittelkanal untergebracht werden, dessen Strömungsquerschnitt zudem im Hinblick auf einen ausreichenden Kühlmitteldurchsatz nicht zu gering sein sollte.In highly loaded internal combustion engines and in particular in diesel engines with turbocharging an additional cooling of the area between each adjacent cylinder chambers is required to avoid excessive thermal load during engine operation. For molding or imaging of corresponding coolant channels, the finished casting
Das Formen bzw. das gießtechnische Abbilden dieses zusätzlichen Kühlmittelkanals übernimmt der in
Bei dem hier wiedergegebenen Ausführungsbeispiel wird der erste Begrenzungsrand 21 des Stegkerns 20 unmittelbar in die eine Wandung des Wassermantelkerns 10 eingebettet, hingegen der zweite Begrenzungsrand 22 nicht unmittelbar in der gegenüberliegenden Wandung befestigt, sondern an dieser nur mittelbar befestigt, nämlich über ein zusätzliches Bauteil in Gestalt eines im Folgenden noch näher erläuterten Stegblechs 25. Alternativ besteht natürlich auch die Möglichkeit, auch den anderen, also zweiten Begrenzungsrand 22 unmittelbar in die entsprechende Wandung des Wassermantelkerns 10 einzubetten.In the embodiment shown here, the
In diesem Zusammenhang sollen unter den Begrenzungsrändern 21, 22 jene beiden im Wesentlichen parallel zu den Längsachsen L der Zylinderausnehmungen verlaufenden Ränder des Stegkerns 20 verstanden werden, die die Länge des Stegkerns 20 in Umfangsrichtung der benachbarten Zylinderausnehmungen begrenzen.In this connection, the boundary edges 21, 22 are to be understood as meaning those two edges of the
Die
Bei dem hier beschriebenen Ausführungsbeispiel ist die Gestaltung des Stegkerns 20 derart, dass im späteren Verbrennungsmotor keine Kühlmittelströmung von der einen Seite des Wassermantels auf dessen andere Seite stattfindet, sondern es findet eine Umlenkströmung in Gestalt einer Schleife statt. Gemäß
In
Der Stegkern 20 besteht in erster Linie aus einem typischen Kernwerkstoff, z. B. aus einem mit organischen oder anorganischen Bindemitteln versetzten Formsand. Ein ausschließlich so ausgebildeter Stegkern hätte jedoch nicht genügend Stabilität gegenüber der während des Gießprozesses zufließenden Metallschmelze. Aus diesem Grund ist jeder Stegkern 20 zur Erhöhung seiner Festigkeit armiert, und hierzu mit einem partiell in den Stegkern 20 eingebetteten Metallträger versehen. Die
Der Metallträger 25, der sich auch als Stegblech bezeichnen lässt, wird vorab separat gefertigt, vorzugsweise durch Stanzen aus einem Materialblech mit einer Blechdicke von 0,5 - 2 mm, vorzugsweise 0,5 - 1 mm und besonders bevorzugt 0,8 mm. Die Verwendung von Aluminium oder einer Aluminiumlegierung für das Stegblech 25 führt dazu, dass beim Guss alle offenliegenden Metallbereiche durch die Leichtmetallschmelze verflüssigt werden, und gleichsam in der Schmelze nach deren Erstarrung mit aufgehen.The
Der Metallträger 25 ist nur bereichsweise in den Kernwerkstoff des Stegkerns 20 eingebettet. Während des Erstarrungsprozesses gehen freiliegende Bereiche des Metallträgers 25 in der erstarrenden Aluminiumschmelze auf und werden so Teil des Gusses.The
Der Endabschnitt des Metallträgers 25 ist blank und wird bei der Herstellung des Wassermantelkerns 10 in diesem eingeschlossen, wodurch es im Wassermantelkern 10 zu einer Fixierung des Metallträgers 25 und damit auch des Stegkerns 20 kommt.The end portion of the
Die Herstellung der Stegkerne mit den darin bereichsweise eingebetteten Metallträgern wird im Folgenden anhand der
Die Formung der Stegkerne 20 erfolgt in einem Kernkasten 40. Die Stegkerne 20 werden darin paarweise geformt, wobei die ersten Begrenzungsränder 21 einander zugewandt angeordnet sind. Beim Ausführungsbeispiel bietet der Kernkasten 40 Platz für insgesamt drei solcher Paare.The formation of the
In den einzelnen Formräumen 45 für die Stegkerne wird zunächst jeweils ein Metallträger 25 in richtiger Lage platziert.In the
Das Einschießen von mit organischen oder anorganischen Bindemitteln versetztem Sand erfolgt über eine beiden Stegkernen eines Stegkernpaars zugeordnete Einschussöffnung 41. Die Einschussöffnung 41 führt über eine Verzweigung 42 zu den beiden Formräumen 45 für das Stegkernpaar.The injection of sand mixed with organic or inorganic binders takes place via a two opening cores of a pair of web core associated
Das über die Einschussöffnungen 41 in den Kernkasten zugeführte Kernmaterial gelangt daher über die Verzweigung 42 in die zu beiden Seiten sich erstreckenden Formräume 45, wobei der Formraum 45 seine größte Querschnittsfläche im Bereich der von der Einschussöffnung 41 bzw. der Verzweigung 42 kommenden Einmündung aufweist. Diese größte Querschnittsfläche formt den ersten Begrenzungsrand 21 des Stegkerns 20 und damit jenen Bereich des späteren Kühlmittelkanals, über den der Zu- und Abtransport des Kühlmittels erfolgt.The core material fed into the core box via the
Der der Einschussöffnung 41 abgewandte Abschnitt des Metallträgers 25 ist in der Kernform fixiert, während der der Einschussöffnung 41 zugewandte Abschnitt des Metallträgers frei in den Formraum 45 hineinragt.The portion of the
Nach Öffnen des Kernkastens 40 lassen sich die paarweise geformten Stegkerne 20 daraus entnehmen. Diese werden im Bereich ihres ersten Begrenzungsrandes 21 von der Verzweigung 42 abgetrennt, und dann wie beschrieben in den einander zugewandten Innenwandungen des Wassermantelkerns 10 (
- 11
- Gießformanordnungmold assembly
- 33
- Gießformmold
- 55
- Zylinderkerncylinder core
- 1010
- WassermantelkernWater jacket core
- 2020
- StegkernSteg core
- 2121
- erster Begrenzungsrandfirst boundary border
- 2222
- zweiter Begrenzungsrandsecond boundary edge
- 2525
- Stegblech, MetallträgerWeb plate, metal carrier
- 3030
- Öffnungopening
- 3131
- Achse der ÖffnungAxis of the opening
- 4040
- Kernkastencore box
- 4141
- Einschussöffnungbullet hole
- 4242
- Verzweigungbranch
- 4545
- Formraumcavity
- AA
- Abstanddistance
- BB
- Dickethickness
- B1B1
- Dickethickness
- LL
- Längsachse ZylinderausnehmungLongitudinal axis of the cylinder recess
Claims (17)
- Method for producing a cylinder crankcase from aluminium or an aluminium alloy, in which, before pouring in the metal melt, the following are arranged in a casting mould (3) which shapes the exterior of the cylinder crankcase:- cylinder cores (5) for forming the cylinder recesses,- at least one water jacket core (10) which forms the cooling channels of the cylinder crankcase, wherein, in order to form additional coolant channels arranged between the adjacent cylinder recesses, separately manufactured bridge cores (20) are fixed internally on the water jacket core (10) and are surrounded by the metal melt during the subsequent casting,characterized by the use of bridge cores (20) which, for the purposes of stabilizing the latter with respect to the inflowing metal melt, are provided with a metal support (25) embedded at least partially therein, said metal support being made of aluminium or of an aluminium alloy.
- Method according to claim 1, characterized in that, when being fixed to the water jacket core (10), at least one end of the bridge core (20) is embedded in the core material of the water jacket core (10).
- Method according to claim 2, characterized in that, in order to fix the other end of the bridge core (20), a section of the metal support (25) which is not embedded in the bridge core (20) is embedded in the core material of the water jacket core (10).
- Method according to any one of claims 1 to 3, characterized by using a metal support (25) configured as a flat sheet-metal part having a sheet thickness of 0.5 to 2 mm, preferably 0.5 to 1 mm.
- Method according to claim 4, characterized in that the metal support (25) is produced by punching from a material sheet.
- Method according to any one of the preceding claims, characterized in that the bridge core (20) is manufactured with at least partial embedding of the metal support (25) by shooting sand, to which organic or inorganic binders have been added, into the cavity (45) of a core box (40), into which the metal support (25) has been placed beforehand.
- Method according to claim 6, characterized by manufacturing the bridge cores (20) in pairs via a shooting opening of the core box (40) which is common to both bridge cores (20), wherein a section of the metal support (25) facing away from the shooting opening is fixed in the core box (40) while a section of the metal support (25) facing towards the shooting opening projects freely into the cavity (45).
- Method according to claim 6 or 7, characterized in that the cavity (45) has its greatest cross-sectional area in the region of the mouth coming from the shooting opening (41).
- Casting mould arrangement for a cylinder crankcase made of aluminium or an aluminium alloy, in which the following are arranged in a casting mould (3) which shapes the exterior of the cylinder crankcase:- cylinder cores (5) for forming the subsequent cylinder recesses,- at least one water jacket core (10) which forms the subsequent cooling channels of the cylinder crankcase, wherein, in order to form coolant channels arranged between the adjacent cylinder recesses, separate bridge cores (20) are fixed internally on the water jacket core (10),characterized in that the bridge cores (20) are provided with a metal support (25) embedded at least partially therein, said metal support being made of aluminium or of an aluminium alloy.
- Casting mould arrangement according to claim 9, characterized in that at least one end of the bridge core (20) is embedded in the core material of the water jacket core (10).
- Casting mould arrangement according to claim 10, characterized in that, in order to fix the other end of the bridge core (20), a section of the metal support (25) which is not embedded in the bridge core (20) is embedded in the core material of the water jacket core (10).
- Casting mould arrangement according to any one of claims 9 to 11, characterized by a metal support (25) configured as a flat sheet-metal part having a sheet thickness of 0.5 to 2 mm, preferably 0.5 to 1 mm.
- Casting mould arrangement according to any one of claims 9 to 12, characterized in that the bridge core (20) is made of sand, to which organic or inorganic binders have been added.
- Casting mould arrangement according to any one of claims 9 to 13, characterized in that, as seen in the circumferential direction of the two adjacent cylinder recesses, the bridge core (20) extends between a first (21) and a second (22) boundary edge, wherein the two boundary edges (21, 22) extend parallel to the longitudinal axis (L) of the cylinder recesses.
- Casting mould arrangement according to claim 14, characterized in that the cross-sectional area of the bridge core (20), as seen in the circumferential direction of the two adjacent cylinder walls, is greater at or close to its first boundary edge (21) than at all other bridge cross-sections.
- Casting mould arrangement according to claim 14 or 15, characterized in that a section of the metal support (25) which is not embedded in the bridge core (2) projects from the second boundary edge (22) and is embedded in the core material of the water jacket core (10).
- Casting mould arrangement according to any one of claims 14 to 16, characterized in that the bridge core (20) is configured as a ring which encloses an opening (30) arranged between the two boundary edges (21, 22), the axis (31) of the opening (30) extending along the connecting line of the two adjacent cylinder recesses.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL13190037T PL2727668T3 (en) | 2012-11-06 | 2013-10-24 | Method for producing a cylinder crankcase and casting assembly for a cylinder crankcase |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012110592.8A DE102012110592A1 (en) | 2012-11-06 | 2012-11-06 | A method of manufacturing a cylinder crankcase and a casting block assembly for a cylinder crankcase |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2727668A1 EP2727668A1 (en) | 2014-05-07 |
EP2727668B1 true EP2727668B1 (en) | 2016-08-31 |
Family
ID=49509936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13190037.5A Active EP2727668B1 (en) | 2012-11-06 | 2013-10-24 | Method for producing a cylinder crankcase and casting assembly for a cylinder crankcase |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2727668B1 (en) |
DE (1) | DE102012110592A1 (en) |
HU (1) | HUE031056T2 (en) |
PL (1) | PL2727668T3 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104028700A (en) * | 2014-06-03 | 2014-09-10 | 芜湖永达科技有限公司 | Cylinder body water jacket core and preparation method thereof |
DE102014109598A1 (en) * | 2014-07-09 | 2016-01-14 | Tenedora Nemak, S.A. De C.V. | Casting core, use of a foundry core and method of making a foundry core |
DE102015012554A1 (en) | 2015-09-25 | 2017-03-30 | Neue Halberg-Guss Gmbh | Cast body of a cylinder crankcase and method of manufacturing using a casting mold with a filigree one-piece insert core |
CN107363227A (en) * | 2017-07-26 | 2017-11-21 | 江苏雷科德轨道交通科技有限公司 | Gear case body casting manufacture craft |
CN107931540B (en) * | 2017-11-24 | 2019-05-17 | 共享装备股份有限公司 | The casting method of V-type engine mainframe |
AT525313B1 (en) * | 2018-01-16 | 2023-06-15 | Avl List Gmbh | CYLINDER BLOCK OF AN INTERNAL ENGINE |
CN108425761A (en) * | 2018-04-03 | 2018-08-21 | 南京世界村汽车动力有限公司 | A kind of housing structure of automobile engine |
CN111957900B (en) * | 2020-07-29 | 2022-03-18 | 东风商用车有限公司 | Replaceable drain sleeve core for casting engine cylinder cover |
CN114454308A (en) * | 2022-03-01 | 2022-05-10 | 北京利尔高温材料股份有限公司 | Current regulator slidingtype inner core assembling die |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE817492C (en) * | 1950-06-02 | 1951-10-18 | Hans Dipl-Ing Kessel | Casting core, especially for objects to be cast in permanent molds |
DE3512076C1 (en) | 1985-04-02 | 1988-01-21 | Halbergerhütte GmbH, 6600 Saarbrücken | Device for the casting production of a cooling device for webs between adjacent cylinders of a cylinder block and a correspondingly produced cylinder block |
JPS62176637A (en) * | 1986-01-30 | 1987-08-03 | Mazda Motor Corp | Production of hollow casting |
US5217059A (en) | 1992-01-16 | 1993-06-08 | Cmi International | Casting core and method for forming a water jacket chamber within a cast cylinder block |
DE59911865D1 (en) * | 1998-07-21 | 2005-05-12 | Hydro Aluminium Alucast Gmbh | Casting mold and casting method for producing an engine block |
JP3040776B1 (en) * | 1999-07-16 | 2000-05-15 | 株式会社小西鋳造 | Support method for cast-in material |
WO2004048765A1 (en) * | 2002-11-26 | 2004-06-10 | Fritz Winter Eisengiesserei Gmbh & Co. Kg | Cast part for an internal combustion engine |
WO2005102560A2 (en) * | 2004-04-20 | 2005-11-03 | Tenedora Nemak, S.A. De C.V. | Method and apparatus for casting aluminum engine blocks with cooling liquid passage in ultra thin interliner webs |
FR2885061B1 (en) * | 2005-04-29 | 2007-07-27 | Peugeot Citroen Automobiles Sa | SINK ETAN FOR CASTER CYLINDER CAST IRON |
DE102005048650B4 (en) * | 2005-10-11 | 2007-09-13 | Daimlerchrysler Ag | Manufacturing process and design for cast components with cavities |
DE102007050124B4 (en) * | 2007-10-19 | 2010-08-12 | Daimler Ag | Housing for an impeller |
DE102008039208A1 (en) * | 2008-08-20 | 2009-02-12 | Heppes, Frank, Dipl.-Ing. | Core for use in prototyping, especially for pressure casting or powder metallurgy, is obtained using metal sheath, molding material, mechanical shaping device and high pressure compression tube |
US8540009B2 (en) * | 2009-02-23 | 2013-09-24 | GM Global Technology Operations LLC | Hollow sand cores to reduce gas defects in castings |
MX339426B (en) * | 2010-06-02 | 2016-05-25 | Emil Muller Gmbh | Infiltrate-stabilized salt cores. |
-
2012
- 2012-11-06 DE DE102012110592.8A patent/DE102012110592A1/en not_active Withdrawn
-
2013
- 2013-10-24 EP EP13190037.5A patent/EP2727668B1/en active Active
- 2013-10-24 HU HUE13190037A patent/HUE031056T2/en unknown
- 2013-10-24 PL PL13190037T patent/PL2727668T3/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE102012110592A1 (en) | 2014-05-08 |
EP2727668A1 (en) | 2014-05-07 |
PL2727668T3 (en) | 2017-12-29 |
HUE031056T2 (en) | 2017-06-28 |
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