EP1477661A2 - Fabrication d'une pièce avec gradient par moulage en couches - Google Patents

Fabrication d'une pièce avec gradient par moulage en couches Download PDF

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Publication number
EP1477661A2
EP1477661A2 EP04010594A EP04010594A EP1477661A2 EP 1477661 A2 EP1477661 A2 EP 1477661A2 EP 04010594 A EP04010594 A EP 04010594A EP 04010594 A EP04010594 A EP 04010594A EP 1477661 A2 EP1477661 A2 EP 1477661A2
Authority
EP
European Patent Office
Prior art keywords
casting
graphite
cast
running
cast iron
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.)
Withdrawn
Application number
EP04010594A
Other languages
German (de)
English (en)
Other versions
EP1477661A3 (fr
Inventor
Ulrich Dieterle
Rolf Heinemann
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.)
Halberg Guss GmbH
Volkswagen AG
Original Assignee
Halberg Guss GmbH
Volkswagen 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
Priority claimed from DE10342582A external-priority patent/DE10342582B4/de
Application filed by Halberg Guss GmbH, Volkswagen AG filed Critical Halberg Guss GmbH
Publication of EP1477661A2 publication Critical patent/EP1477661A2/fr
Publication of EP1477661A3 publication Critical patent/EP1477661A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F02F7/00—Casings, e.g. crankcases or frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/007—Treatment of the fused masses in the supply runners
    • 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
    • B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
    • 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
    • B22D27/20—Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0436—Iron
    • F05C2201/0439—Cast iron

Definitions

  • the invention relates to a method for producing a casting from graphite-containing Cast iron with the features of the preamble of claim 1. It relates also on a device which is particularly suitable for carrying out the method, and on the castings manufactured with them and their uses.
  • DE-A1-36 22 511 discloses a method for pouring on a (noble) metal body on another (precious) metal body, on the body that was cast first a second molten metal is poured on. This creates a gap-free intermediate area between the two workpieces. According to the above However, print will be available a graphite release agent layer is applied to the pouring of the second body, which prevent the two castings from merging.
  • GJV cast iron with compact is often used Graphite inclusions - used.
  • GJS i.e. spheroidal graphite cast iron.
  • the latter materials also have manufacturing disadvantages because they tend z. B. to higher porosity. In particular, they are for high speed machining less useful, e.g. B. when cylinder bores and oil channels through PCBN cutting should be introduced.
  • the invention is based on the object of a method for producing a casting with differently stressed areas or zones, in particular a cylinder crankcase for internal combustion engines, to indicate with which different materials can be arranged in the casting according to the load.
  • a device is also to be created which is particularly suitable for carrying out the process according to the invention Process is suitable.
  • this object is achieved according to the invention solved with the features of claim 1.
  • the features of the claim 11 indicate a corresponding device, while in claim 20 corresponding Castings are stressed.
  • the characteristics of the independent claims subordinate claims give advantageous developments of the invention on.
  • a casting is made in a uniform Mold made from different batches of cast iron, their properties better geared to the different operational stresses in certain areas or to these can be customized as this with a homogeneous batch of cast iron or - Alloy is possible for the entire casting.
  • Such a casting can also be used as Gradient casting can be called, because in any case its inner graphite structure is not is the same everywhere.
  • the cylinder axes become during casting or in orient the shape preferably vertically, the cylinder area positioned above or below can be. It is preferred to pour upwards, but also downwards is possible.
  • Another advantageous embodiment provides that the running and gating system one component or alloy during the casting of a second component or alloy is closed, so that the two alloys do not accidentally can mix.
  • poured a common base melt into the sprue This is used to manufacture the graphite structures required for the different areas of the finished casting in a manner known per se by adding modifiers, alloying elements, Inoculants and other suitable agents in the pouring funnel, in the pouring stream or treated in the individual running and gating system.
  • a running and gating system is used used for one or more cast batches (materials).
  • a particularly suitable device for carrying out the method discussed above is Different run and gate channels for feeding the individual melt batches to include the areas of the form with the differently alloyed and modified Cast iron batches are to be filled. When using one to be filled in vertical order These different filling levels are staggered vertically. A separation of the different layers is not necessary, because according to the inventive method Transitions or a quasi-autogenous course of the alloys in the transition areas are desired.
  • the device is operated in increasing casting, falling pouring is also conceivable, as described above. It includes the Furthermore at least one overflow from which the batch just cast from the mold can exit as soon as the level assigned to it is reached. This is next to one Overfill protection also allows a visual control of the melt level. It understands by itself that overflows preceded while filling more layers encapsulated batches are sealed, in particular by solidification. It can also Device contain closure devices with which inlets from first cast Batches are sealed while a subsequent batch is filled into the mold. In order to returns of the still liquid pre-batch based on the principle of communicating Prevents tubes. Further details and advantages of the method and the device according to the invention go from the drawing of an embodiment and their themselves here following detailed description.
  • a mold 2 is like this aligned that the axes of the cylinders 3 are perpendicular - parallel to the direction of gravity.
  • a power flow area 5 can be seen, which later has to absorb the gas forces.
  • the crankcase outer wall 6 can also be seen arranged inside the form 2 below the cylinder bank with its cooling water jacket Crankcase 4 is cast over a first running and gating system 7.
  • the inflow the melt in form 2 is at the bottom of the latter, so it is poured upwards.
  • An overflow 8 is at the level of the transition from the crankcase 4 to the cylinders 3 intended. It marks the threshold up to which the Form 2 marks out with a first batch Cast iron can be filled with preferably vermicular or spheroidal graphite. Naturally more than one overflow can be provided at the same level; the arrangement is here shown only schematically simplified.
  • the mold 2 with the cast material is included the properties desired for the area of the crankcase. This has the The advantage that you don't necessarily work with a precisely defined amount of melt must, but can work with a tolerable tolerance.
  • the first running and gating system is then closed with the aid of a closing device 9 7.
  • the overflow 8 is closed by rapid solidification.
  • the first casting batch is now a second by a second barrel and gate system 10 Cast batch cast from one material (also in increasing cast), which is suitable for the Has cylinder properties desired properties, preferably with lamellar graphite or Vemiculargraphit.
  • the preferred combinations with the material of the first batch have already been discussed above.
  • the closure device 9 prevents that after introducing the material over the first Running and gating system 7 this is pushed back again (communicating Tubes) when the material is filled in via the second run and gate system 10.
  • Form 2 could also be used with the cylinders arrange downwards and the casting material intended to form their walls First fill in via the first run and gate system 7- until it comes out of the overflow 8 exit. Thereafter, the crankcase 4 would over the second barrel and gate arrangement 10 cast from the designated material. Changes to the result / product achieved nothing.
  • the two running and gating systems are 7 and 10 shown completely separate from each other. As stated above, you can nevertheless be fundamentally fed from the same base melt if the funds to provide the different graphite structures in the systems mentioned itself (not shown) can be provided. For large series production, however, it is also conceivable to hold different base melts, from which the respective ones Running and gating systems can be filled individually.
  • FIG. 2 shows a modification 1 'of the device in a representation similar to FIG. 1 1 from Fig. 1.
  • the device 1 'shown in Fig. 2 also has two running and Gate systems 7 and 10, now with the running and gate system 7 of Cylinder area and with the running and gating system 10 the crankcase area is poured, starting with the crankcase area with the barrel and gate system 10 and then the cylinder area with the barrel and gate system 7 cast becomes.
  • two distributor strips 11 and 12 are provided in the running and gating system 10, which extend along the crankcase outer walls 6 and over the entire Length of the cylinder crankcase to be cast a direct filling of the form 2 in the area allow the crankcase outer walls 6. This results in a special one favorable filling of the crankcase outer walls 6 without turbulence, so that a uniform microstructure is created.
  • the cylinder area 3 is over several, also over the length of the cylinder crankcase distributed central inlets 13 of the running and gating system 7 with a second, for first casting batch filled different casting batch, one compared to the crankcase different structure with a different graphite formation results.
  • Cylinder region 3 also has a uniform material distribution over the cylinder tube bank reached.
  • FIG. 3 A further modification of the device 1 'from FIG. 2 is with the device 1 "in FIG. 3 shown.
  • the running and gating system 7 is modified such that the Central inlets 13 replaced by inlets 14 and 15 when filling the cylinder area have been, which open into the form 2 directly in the area of the cylinder wall.
  • an annular inlet can also be provided, so that a direct and immediate filling of the cylinder wall is possible. This can be a more defined one Adjustment of the microstructure in the cylinder area 3 can be made.
  • Fig. 4 shows a device 1 "', in which the crankcase to be cast or the corresponding Form 2 is rotated by 90 ° with respect to the embodiments of FIGS. 1 to 3, so that the cylinder axis is horizontal, that is, perpendicular to the direction of gravity is arranged.
  • the gating system 10 is a third running and gating system 17 intended. With the different barrel and gate systems that are staggered vertically are arranged, and the correspondingly arranged overflows 8, it is possible to provide different graphite structures in layers in the cylinder crankcase.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
EP04010594A 2003-05-06 2004-05-04 Fabrication d'une pièce avec gradient par moulage en couches Withdrawn EP1477661A3 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE10320396 2003-05-06
DE10320396 2003-05-06
DE10331555 2003-07-11
DE10331555 2003-07-11
DE10342582A DE10342582B4 (de) 2003-05-06 2003-09-15 Herstellen eines Gradientenwerkstücks durch Schichtgießen
DE10342582 2003-09-15

Publications (2)

Publication Number Publication Date
EP1477661A2 true EP1477661A2 (fr) 2004-11-17
EP1477661A3 EP1477661A3 (fr) 2005-09-14

Family

ID=33032853

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04010594A Withdrawn EP1477661A3 (fr) 2003-05-06 2004-05-04 Fabrication d'une pièce avec gradient par moulage en couches

Country Status (1)

Country Link
EP (1) EP1477661A3 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6360064A (ja) * 1986-08-29 1988-03-16 Hitachi Metals Ltd 複合ロ−タハブの鋳造法
EP0881019A1 (fr) * 1997-05-26 1998-12-02 Wärtsilä NSD Schweiz AG Procédé de fabrication de pièces métalliques coulées, pièce métallique coulée ainsi que moteur à pistons à combustion interne
JP2001121245A (ja) * 1999-10-26 2001-05-08 Kurimoto Ltd 鋳鉄部品の製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6360064A (ja) * 1986-08-29 1988-03-16 Hitachi Metals Ltd 複合ロ−タハブの鋳造法
EP0881019A1 (fr) * 1997-05-26 1998-12-02 Wärtsilä NSD Schweiz AG Procédé de fabrication de pièces métalliques coulées, pièce métallique coulée ainsi que moteur à pistons à combustion interne
JP2001121245A (ja) * 1999-10-26 2001-05-08 Kurimoto Ltd 鋳鉄部品の製造方法

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
AMBOS, EBERHARD ET AL: "Criteria for the selection of a material combination for the manufacture of gradient material cast components" GIESSEREI , 89(1), 43-45 CODEN: GIESAS; ISSN: 0016-9765, 2002, XP009051028 *
PATENT ABSTRACTS OF JAPAN Bd. 012, Nr. 282 (M-726), 3. August 1988 (1988-08-03) & JP 63 060064 A (HITACHI METALS LTD), 16. März 1988 (1988-03-16) *
PATENT ABSTRACTS OF JAPAN Bd. 2000, Nr. 22, 9. März 2001 (2001-03-09) & JP 2001 121245 A (KURIMOTO LTD), 8. Mai 2001 (2001-05-08) *
STETS, W. (IFG INSTITUT FUR GIESSEREITECHNIK): "Material basics of compound casting of cast iron with steel.ÄWerkstoffkundliche Grundlagen des Verbundgiessens von Gusseisen mit Stahl.Ü." GIESSEREI 86, (8), 55-61, GRAPHS, PHOTOMICROGRAPHS, 30 REF. ISSN: 0016-9765, 1999, XP009051027 *

Also Published As

Publication number Publication date
EP1477661A3 (fr) 2005-09-14

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