EP2646183A1 - Procédé de fabrication d'une roue en fonte et outil de coulée - Google Patents

Procédé de fabrication d'une roue en fonte et outil de coulée

Info

Publication number
EP2646183A1
EP2646183A1 EP11794621.0A EP11794621A EP2646183A1 EP 2646183 A1 EP2646183 A1 EP 2646183A1 EP 11794621 A EP11794621 A EP 11794621A EP 2646183 A1 EP2646183 A1 EP 2646183A1
Authority
EP
European Patent Office
Prior art keywords
core
casting tool
mold part
casting
positioning element
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.)
Granted
Application number
EP11794621.0A
Other languages
German (de)
English (en)
Other versions
EP2646183B1 (fr
Inventor
Helmuth Huber
Manfred Johannes Ebetshuber
Josef Gartner
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.)
Borbet Austria GmbH
Original Assignee
Borbet Austria GmbH
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 Borbet Austria GmbH filed Critical Borbet Austria GmbH
Priority to PL11794621T priority Critical patent/PL2646183T3/pl
Priority to SI201131574T priority patent/SI2646183T1/sl
Publication of EP2646183A1 publication Critical patent/EP2646183A1/fr
Application granted granted Critical
Publication of EP2646183B1 publication Critical patent/EP2646183B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
    • 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
    • B22C9/064—Locating means for cores
    • 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
    • B22C9/108—Installation of cores
    • 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
    • B22D15/005—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 rolls, wheels or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/24—Accessories for locating and holding cores or inserts
    • 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

Definitions

  • the invention relates to a method for producing a cast wheel, wherein a core remaining in the casting wheel, which has a peripheral rim, is inserted into a casting tool having at least one lower mold part and one upper mold part which are moved relative to one another to close the casting mold, wherein the Core is positioned by means of at least one positioning element in a predetermined position in the casting mold, wherein an end portion of the positioning is frictionally locked in the circumferential ring of the core.
  • the invention further relates to a casting tool for producing a cast workpiece, in particular a cast wheel, with at least one lower molded part and an upper molded part, which is intended for
  • Closing of the casting tool relative to each other are movable.
  • a method for producing a wheel cast rim in which a preformed metal foam core part is inserted into a casting tool which has a mold upper part, a mold bottom part and lateral core slides.
  • the core part is fixed in position by means of positioning elements and then surrounded with a light metal.
  • the casting tool or the positioning on a vent For diverting gases that austre ⁇ th when casting the core part, the casting tool or the positioning on a vent. The remaining in the casting wheel positioning are fixed to the core.
  • the positioning elements with the movable mold upper part enter into a self-clamping connection.
  • the positioning element has a conical lateral surface, which causes the self-clamping effect by abutment with a shoulder forming a cross-sectional constriction in the vent opening of the mold upper part.
  • This technique has proven to be particularly useful to keep the core part with positioning in the predetermined position, if the positioning attached to ribs of the core part who ⁇ can, which protrude from an annular outer part radially inwardly.
  • the protruding in the axial direction of the ribs positioning can be clamped in the appropriate vent of Kokillenoberteils become.
  • a mold for casting a hollow camshaft For this purpose, a casting core is arranged in the casting mold, which has a free end. To support the free end of the casting core, a support is provided. The support has on both sides of the casting core anchoring sections, which are anchored between the lower part and upper part of the mold. Thus, the support extends between opposite sides of the casting tool.
  • this embodiment is intended or suitable only for casting different types of molded parts.
  • WO 2006/042350 Al and EP 1 792 674 A1 disclose other types of positioning devices.
  • the object of the present invention is to provide a method and a casting tool for producing a cast wheel with a corona-shaped core of the type mentioned, which ensures an exact positioning of the core in the casting tool with the greatest possible freedom for the design of the core.
  • the positioning element In order to position the core in the casting tool, the positioning element is accordingly placed on the corresponding contact surface of the base. ren molding of the casting tool placed. In this position, the core is positioned under the action of gravity without contact with the mold parts of the casting tool. The holder of the core is thus carried out in particular on the weight of the core, so that a stable support on the support surface is achieved. Accordingly, it is not necessary to provide a clamping connection between the positioning element and the associated molded part of the casting tool for centering the core.
  • the positioning is placed on a respect to its operating position substantially horizontally arranged bearing surface;
  • the positioning element is clamped when closing the casting tool between the support surface of the lower mold part and a corresponding contact surface of the upper mold part.
  • the core is first placed on the support surface of the lower mold part before the mold parts are moved towards each other for closing the casting tool, wherein the positioning element is clamped between the corresponding con ⁇ tact surfaces of the casting tool.
  • the core is secured against slipping during the casting process, so that the core is arranged with high accuracy in the desired position in the finished casting workpiece.
  • the core In order to position the core in the predetermined position in the molding tool, it is favorable when a is from the core protrude ⁇ the pin-shaped, plate-shaped or bügeiförmiger end portion of the positioning member placed on the support surface of the lower mold part.
  • the other end portion of the positioning element in the core is preferably frictionally and / or kraftschlüs ⁇ sig fixed.
  • the shape of the end region projecting from the core determines the contact surface with the bearing surface of the lower end
  • an end region of the positioning element projecting essentially radially inwards from a circumferential rim of the core is placed on the bearing surface of the lower molded part.
  • a cast workpiece is formed, which encloses the particular circular encircling ring.
  • This method is particularly useful for producing a cast wheel, in which the core is arranged substantially completely in a circumferential rim flange.
  • the ring has in particular radially inwardly projecting pockets which optionally extend into the spokes of the cast wheel Kgs ⁇ NEN.
  • Positioning elements are arranged at substantially regular angular intervals on the circumferential rim. Of course, however, the positioning elements can be positioned at arbitrary locations, ie without a necessarily predetermined uniform division, at the core. When inserting the core into the casting tool ⁇ the positioning elements are placed on the right Aufla ⁇ ge lake the lower mold part.
  • the cast workpiece is painted or powdered at least in the region of the cut end of the positioning element.
  • the entire cast workpiece is finally painted to eliminate the risk of corrosion as much as possible.
  • the object underlying the invention is achieved in that the lower molding a circular encircling survey with a
  • the circular peripheral elevation prefferably be formed as a section of boundary surfaces enclosing a cavity.
  • the shape of the finished casting workpiece is defined by the cavity enclosed by the boundary surfaces.
  • the support surface is arranged substantially horizontally in operation.
  • the arrangement of the support surface ensures that the core is held without contact at least to the lower mold part under the action of gravity. This can be achieved in principle by a tilted at a shallow angle bearing surface depending on the version.
  • the upper mold part and / or the lower mold part have a groove.
  • the shape of the groove corresponds to the outer contour of the positioning element inserted in the groove, so that the positioning element does not laterally encase the core with a light metal can dodge
  • the groove (s) of the upper and lower mold part in a closed position of the casting tool is or are such that the Core abste ⁇ positioning element is clamped in or in the groove (s).
  • the trapped in the groove positioning can not escape from the predetermined position even under high load, so that the core is arranged with high precision in the desired position in the cast workpiece.
  • sealing surfaces are provided between the upper and lower shaped parts, wherein the bearing surface is formed as a section of the sealing surface of the lower molded part. Accordingly, the sealing surface of the lower molding on the especially in operation horizontally arranged bearing surface, whereby the positioning of the core is considerably facilitated in the casting tool.
  • Fig. 1 is a cross-sectional view of a portion of a casting tool receiving a core cast from a light metal;
  • Fig. 2a is a front view of the core, being attached to a rotating ring bügeiförmige positioning elements
  • Fig. 2b shows the detail illustrated in Fig. 2a with a circle in contrast enlarged scale
  • Fig. 3 is a sectional view of the core taken along the line C-C in Fig. 2b;
  • 4a is a view of a part of the core, which according to a the lower version is connected to a plate-shaped end portion having a positioning element;
  • Fig. 4b shows the detail illustrated in Fig. 4a with a circle in contrast enlarged scale
  • Fig. 5a is a view of a part of the core which is connected according to a further embodiment with a pin-shaped positioning element;
  • Fig. 5b illustrates the detail illustrated in Fig. 5a with a circle in contrast enlarged scale.
  • FIG. 1 shows a section of a casting tool 1 for producing a cast workpiece 2.
  • a light metal rim or a cast wheel 2 ' is produced for a motor vehicle.
  • a core 3 is accommodated, which has a lower density than a light metal alloy, with which the core 3 for forming the
  • Casting wheel 2 ' is surrounded.
  • the core 3 is preformed from a compact, for example of porous silicate material, in particular vermiculite; the core 3 may alternatively consist of a metal foam or any other material.
  • a weight saving can be achieved.
  • the casting tool 1 is in the form of a mold having an upper molded part 4 and a lower molded part 5.
  • the casting tool 1 for example, four circumferentially adjoining core slide 6.
  • the upper mold part 4 is moved toward the lower mold part 5, wherein the lateral core slide 6 are moved radially inwardly until it rests against the lower mold part 5.
  • a positioning element 7 is provided, which is connected to the core 3.
  • the positioning element 7 makes it possible to arrange the core 3 without contact with the molded parts 4, 5 when it is inserted into the casting tool 1, before the core 3 is surrounded with the light metal alloy.
  • the core 3 is surrounded on all sides by the light metal alloy.
  • a self-clamping connection between the positioning element 7 and the upper molded part 4 has often been made for centering the core 3 in the casting tool 1.
  • the core 3 shown has a comparatively short extent in the axial direction, so that the core 3 does not extend below the upper molded part 4. Accordingly, it is not possible in this embodiment, make a positioning of the core 3 via a self-locking connection with the upper mold part 4.
  • the positioning element 7 is placed during positioning of the core 3 in the casting mold 1 on a support surface 8 of the lower mold part 5.
  • the core 3 is thus held under the action of gravity without contact to the mold parts 4, 5 in the predetermined position.
  • the support surface 8 is arranged horizontally relative to an operating position of the casting tool 1.
  • the lower mold part 5 has a circular circumferential elevation 9, the saddle ⁇ surface comprises the support surface 8.
  • the elevation 9 has flanks 10, 11 which connect radially outwards or radially inwards to the horizontal support surface 8.
  • the support surface 8 and seen in the radial direction inner edge 10 of the elevation 9 are formed as sections of sealing surfaces 12 between the correspondingly shaped mold parts 4, 5.
  • the outer edge 11 seen in the radial direction is concavely curved according to the shape of the finished rim bed.
  • the flank 11 thus forms a section of boundary surfaces 13 which enclose a cavity 14 which images the shape of the cast wheel 2 '.
  • the support surface 8 of the lower mold part 5 has a groove 16 into which the positioning element 7 is inserted. When closing the casting tool 1, the positioning element 7 is clamped between the support surface 8 of the lower mold part 5 and a facing contact surface of the upper mold part 4, to secure the core 3 on all sides against slipping.
  • FIGs. 2a and 2b an embodiment of the core 3 is shown, which provides a circular encircling ring 17 having radially inwardly projecting pockets 18.
  • a total of four distributed over the circumference of the ring 3 positioning elements 7 are provided, which are fixed frictionally or non-positively on the rim 17.
  • the free end portions of the positioning 7 are from the rim 17 radially inwardly from.
  • the positioning element 7 is folded in the shape of a bow, the free ends of the legs of the bow-shaped positioning element 7 being fixed in the ring 17 of the core 3.
  • FIGS. 4a and 4b show an alternative embodiment of the positioning element 7, which has a plate-shaped end portion which is placed on the support surface 8.
  • a pin-shaped positioning element 7 is provided.
  • the fixation of the Po ⁇ sitionierelements 7 in the core 3 can be done in a known manner positive or non-positive.
  • the positioning element 7 expediently has a tapered end, which is pushed into the preformed core 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Devices For Molds (AREA)

Abstract

L'invention concerne un procédé ou un outil de coulée pour la fabrication d'une roue en fonte (2'), un noyau (3) restant dans la roue en fonte (2') et comportant une couronne périphérique (17) est introduit dans un outil de coulée (1) doté d'au moins une partie de moule inférieure (5) et d'une partie de moule supérieure (4) qui sont déplacées l'une par rapport à l'autre pour fermer l'outil de coulée (1). Le noyau (3) est positionné dans une position prédéfinie dans l'outil de coulée (1) au moyen d'au moins un élément de positionnement (7), une zone d'extrémité de l'élément de positionnement (7) étant fixée à force ou par friction dans la couronne périphérique (17) du noyau (3). Une zone d'extrémité libre de l'élément de positionnement (7) faisant saillie de la couronne périphérique (17) du noyau (3) est appliquée, lors du positionnement du noyau (3) dans l'outil de coulée (1), sur une surface d'appui (8) de la partie de moule inférieure (5) de l'outil de coulée (1) agencée de manière sensiblement horizontale de préférence lors du fonctionnement, de telle sorte que le noyau (3) est positionné dans la position prédéfinie sous l'effet de la gravité.
EP11794621.0A 2010-12-02 2011-12-02 Procédé de fabrication d'une roue en fonte et outil de coulée Active EP2646183B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL11794621T PL2646183T3 (pl) 2010-12-02 2011-12-02 Sposób wytwarzania koła odlewnego i narzędzie odlewnicze
SI201131574T SI2646183T1 (sl) 2010-12-02 2011-12-02 Postopek za izdelavo litega kolesa in livarsko orodje

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA2006/2010A AT510737B1 (de) 2010-12-02 2010-12-02 Verfahren zur herstellung eines gusswerkstücks, insbesondere eines gussrads
PCT/AT2011/000485 WO2012071599A1 (fr) 2010-12-02 2011-12-02 Procédé de fabrication d'une roue en fonte et outil de coulée

Publications (2)

Publication Number Publication Date
EP2646183A1 true EP2646183A1 (fr) 2013-10-09
EP2646183B1 EP2646183B1 (fr) 2018-06-13

Family

ID=45346112

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11794621.0A Active EP2646183B1 (fr) 2010-12-02 2011-12-02 Procédé de fabrication d'une roue en fonte et outil de coulée

Country Status (10)

Country Link
US (1) US9180513B2 (fr)
EP (1) EP2646183B1 (fr)
JP (1) JP5612779B2 (fr)
CN (1) CN103328132B (fr)
AT (1) AT510737B1 (fr)
BR (1) BR112013013652B1 (fr)
PL (1) PL2646183T3 (fr)
RU (1) RU2568552C2 (fr)
SI (1) SI2646183T1 (fr)
WO (1) WO2012071599A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103111588B (zh) * 2013-01-30 2015-03-25 洛阳双瑞精铸钛业有限公司 一种钛合金叶轮精密铸件的制造方法
KR101575314B1 (ko) * 2014-03-18 2015-12-07 현대자동차 주식회사 차량용 알루미늄 휠 및 그 제조 방법
FR3088582B1 (fr) * 2018-11-20 2020-11-20 Commissariat Energie Atomique Jante à une portion structurée

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US3253862A (en) * 1964-06-08 1966-05-31 Kelsey Hayes Co Wheel and method of making the same
US3545524A (en) * 1967-02-16 1970-12-08 Abex Corp Method of casting a wheel
JPS542222A (en) * 1977-06-07 1979-01-09 Nakanihon Chiyuukou Kk Method of supporting core in casting
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JP3915155B2 (ja) * 1996-12-17 2007-05-16 アイシン精機株式会社 内燃機関用ピストンの製造方法
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Also Published As

Publication number Publication date
BR112013013652B1 (pt) 2018-08-07
EP2646183B1 (fr) 2018-06-13
RU2013127877A (ru) 2015-01-10
JP2013544192A (ja) 2013-12-12
WO2012071599A1 (fr) 2012-06-07
RU2568552C2 (ru) 2015-11-20
AT510737A1 (de) 2012-06-15
US9180513B2 (en) 2015-11-10
JP5612779B2 (ja) 2014-10-22
BR112013013652A2 (pt) 2016-09-06
US20130240168A1 (en) 2013-09-19
SI2646183T1 (sl) 2018-11-30
AT510737B1 (de) 2013-06-15
PL2646183T3 (pl) 2018-12-31
CN103328132B (zh) 2015-11-25
CN103328132A (zh) 2013-09-25

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