EP1261445A1 - Verfahren zum herstellen einer rad-gussfelge und giesswerkzeug hierfür - Google Patents
Verfahren zum herstellen einer rad-gussfelge und giesswerkzeug hierfürInfo
- Publication number
- EP1261445A1 EP1261445A1 EP01905484A EP01905484A EP1261445A1 EP 1261445 A1 EP1261445 A1 EP 1261445A1 EP 01905484 A EP01905484 A EP 01905484A EP 01905484 A EP01905484 A EP 01905484A EP 1261445 A1 EP1261445 A1 EP 1261445A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core part
- casting
- light metal
- casting tool
- 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
Links
Classifications
-
- 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
- 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
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/14—Machines with evacuated die cavity
-
- 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
Definitions
- the invention relates to a method for producing a wheel cast rim from light metal by casting in a casting tool, wherein at least one preformed metal foam core part is inserted into the casting tool, therein with the aid of positioning elements, e.g. Pins, fixed in position and finally cast over with the light metal.
- positioning elements e.g. Pins
- the invention relates to a casting tool for carrying out the method according to the invention, with molded parts movable relative to one another, and to a metal foam core part for the method according to the invention.
- a light metal cast rim is known from WO 99/39923, in which a metal foam core part is provided to reduce the rim weight.
- a metal foam core part is provided to reduce the rim weight.
- voids are formed in the light metal, which renders the light metal rims produced unusable.
- Studies have finally shown here that the cause of this void formation in the exit of gas from the metal foam core part when it is heated when cast with the light metal - e.g. Aluminum - lay.
- EP 356 736 A2 shows a method and a casting tool for producing a wheel cast iron fig, in which a vent hole is provided, to which devices for air outlet or air supply are connected.
- the vent hole or the devices for air extraction or air supply connected to it are provided in order to overcome the problems which occur in conventional low-pressure casting processes, which occur in the lower region of the casting mold, in which the melt is supplied via a weir.
- a cooling device in the lower part of the casting mold also causes different temperatures of the hot melt, as a result of which defects can arise in the casting.
- the vent hole is used after the melt has reached this area and until then Air could escape, compressed air was introduced, thus increasing the strength of the cast body.
- it is a conventional cast wheel rim is affected, ie without a lost core, the problem of expanding air in the preformed metal foam core part not occurring during the encapsulation.
- the inventive method of the type mentioned is characterized in that during the encapsulation of the core part with the light metal gas, which emerges from the core part when it is heated as a result of the associated expansion, through at least one ventilation opening in the casting tool, optionally also in one inserted therein Venting element that is discharged to the outside.
- the expanding gas emerging from the core part is discharged from the mold, i.e. "Vented"; This prevents gas from entering the light metal melt, so that there are no voids in the cast light metal. Tests have shown that simply preheating the core part before the casting process in order to avoid gas expansion during casting is not possible to a sufficient extent, since the metal foam core part already becomes quite soft below its melting point and thus loses dimensional stability so that it does not is more manageable.
- the invention provides a very simple and efficient solution to prevent the expanding gas from escaping into the light metal surrounding the metal foam core part by diverting the gas through one or, preferably, multiple vents in the mold, i.e. the gas can flow to the environment through these vents.
- one or more ventilation elements can optionally also be provided on the core part in order to prevent the outflow to simplify the gas through these ventilation elements on the core part and through the associated ventilation openings in the casting tool.
- the attachment of additional ventilation elements can advantageously be omitted, since the positioning elements themselves are additionally used for gas discharge.
- the positioning element is fastened tightly to the core part.
- the positioning element is partially foamed in during the foaming of the core part, a very tight connection between the core part and the positioning element is advantageously achieved. This also eliminates the need for an additional step to connect the positioning element to the core part.
- the positioning of the positioning elements into the core part can sometimes lead to difficulties in the production of the core part, since the core part is subject to large thermal expansions during production and the positioning elements attached to it are difficult to remove from the casting mold after the metal foam core part has cooled down on the other hand, it is advantageous if the positioning element is screwed into the prefabricated core part with the aid of a threaded section.
- a separate sealant such as e.g. a refractory putty on which positioning element fastening parts are attached.
- the core part is coated with the light metal before the casting in order to avoid infiltration of light metal when casting with a sealant, for example graphite.
- This coating reduces the outer porosity of the metal foam core part. This has the advantage that the undesirable penetration of the liquid light metal surrounding the core part into the metal foam core part is avoided becomes .
- the core part is heated with the light metal before being cast around it. Rapid heating of the core part from room temperature to approx. 700 ° C, which occurs during casting, would lead to a very strong, rapid expansion of the core part, which would result in a poor quality alloy wheel. If the core part is heated to a temperature between 350 ° and 450 °, it is still sufficiently dimensionally stable that it can also be mechanically captured and inserted into the casting mold.
- the ventilation opening in the ventilation element cast in is sealed, for example with synthetic resin or by tightly inserting a pin, the penetration of liquid, e.g. splash water, when using the light alloy cast rim.
- the removal of the gas is at least initially supported by applying a negative pressure to the ventilation opening, the expanding gas can be discharged from the interior of the casting tool in a particularly reliable manner.
- a pressure - e.g. Ambient pressure - is built up in the core part via the ventilation opening in order to counteract infiltration of the light metal into the core part.
- the positioning element in particular the pin, is used to clamp the core part to a molded part of the casting tool, the positioning element in the Vent hole is fixed in the mold.
- the core part is thus brought into position and held in place by fixing the positioning elements in the area of the ventilation openings.
- the positioning element preferably has a conical outer surface, through which a self-locking effect in the ventilation opening can be achieved.
- the core part is attached to the upper, movable molding part of the casting tool with the aid of several positioning elements when it moves down on the is fixed on a temporary base core part until the stops limiting the downward stroke of the casting mold part are reached.
- the height of the stroke-limiting stops for the upper molded part should rather be designed in the direction of a slight pushing in of the positioning elements into the metal foam core part, since this has no disadvantages and, on the other hand, brings about a reliable connection between the positioning elements and the ventilation openings. Tests have shown that with usual manufacturing tolerances for the positioning elements and ventilation openings, a pressing of the positioning elements into the core part of at most 0.5-1 mm can be expected.
- the gas is discharged through a number of ventilation openings in the area of the rear of the cast rim.
- the casting tool of the type mentioned at the outset is characterized in that at least one ventilation opening is provided in at least one molded part.
- This ventilation opening advantageously enables the gases enclosed in the metal foam core part to escape from the casting mold when the core part is heated during casting and thus to avoid the inclusion of these gases in the cast wheel rim to be produced.
- the ventilation opening is provided in the upper, movable molded part of the casting tool, the gas flowing upwards can be discharged particularly easily; Furthermore, the vent opening can advantageously be automatically connected to a positioning element which may be provided in the metal foam core when the upper molded part of the casting tool is shut down.
- the ventilation opening has an inner shoulder.
- At least one stop which limits the downward stroke of the movable casting tool part, reliable joining takes place between the positioning element and the vent opening in the desired exact position.
- a metal foam core part is also provided, which is characterized by at least one positioning element provided for gas discharge with a ventilation opening.
- Figure 1 is a perspective view of a partially broken light alloy cast rim with a metal foam core part.
- FIG. 2 shows a section through this light metal cast rim according to line II-II in FIG. 1;
- FIG. 3 shows a section of the light metal cast fig along the line III-III in Fig. 1.
- FIG. 4 shows a perspective view of the back of a metal foam core part together with positioning elements in the form of pins
- FIG. 5 shows a cross section of a part of a casting tool with a metal foam core part inserted therein, including the foamed-in positioning element, prior to casting;
- FIG. 6 shows a corresponding cross section of a metal foam core part which has been introduced into the casting tool and has a screwed-in positioning element before casting;
- FIG. 7 shows a schematic view of a casting tool for producing a light metal rim while inserting a metal foam core part, which lies on a temporarily pivoted-in base;
- Fig. 8 is a plan view of the lower part of the base temporarily pivoted into the casting tool without a core part.
- FIG. 1 shows a partially broken perspective view of a light metal cast rim 1 in a composite structure with a metal foam core part 2, which is «Tr tQ P- PJ rt P- PJ rt P- rt f cn $.
- the positioning element 7 has a conical lateral surface 12, which, by abutment against a shoulder 13 forming a cross-sectional constriction, causes a self-locking effect in the vent opening 11.
- the positioning element 7 is partially foamed in the core part 2 with the aid of an end flange 14 and therefore does not have to be subsequently connected to the core part 2.
- the casting tool is composed of the upper mold part 9, a lower mold part 15 and lateral core slides 16 (only one is shown in FIG. 5);
- the core slide 16 there can be four quarter-circle-shaped individual parts as the core slide 16, which, when the mold 8 is closed, are moved radially inwards from the outside to rest on the mold lower part 15.
- the metal foam core part 2 heats up very strongly (this being preheated to about 350 to 450 ° C. in order to obtain a certain dimensional stability which leads to It is necessary to insert the core part 2 into the mold 8), since the liquid light metal has a temperature of approx. 700 ° C., the gases enclosed in the core part 2 expand strongly. These gases are discharged through the ventilation openings 11 and the positioning elements or centering pins 7.
- a pipe or hose system can be connected to the ventilation openings 11 in order to support the discharge of the gases with the aid of a pump (not shown): To also ensure that these gases initially penetrate into the light metal shell 5 (see FIG. 2) to prevent, a negative pressure can be applied to the ventilation opening 11 in order to facilitate the escape of the expanding gas from the core part 2 via the ventilation opening 11.
- a counter pressure (at least like the ambient pressure) can be applied via the ventilation openings 11
- Fig. 7 not shown) to record, compensate.
- Column-shaped stops 22 ' are provided on the plate support 22, which serve to set the desired distance from the upper mold part 9, which is pushed down by means of a carrier plate 23, when the core part is received.
- a dimension is set at which the positioning elements or pins 7 are rather pressed in or slightly yielding in the direction of the core part 2 in order to reliably fix the positioning elements 7 in the ventilation openings 11 of the upper mold part 9 to achieve (see. Fig. 5 and 6).
- ejection pins 25 are provided in a conventional manner, which serve to separate the light metal cast rim from the upper part 9 of the mold.
- FIG. 8 shows a top view of the plate support 22 with the stops 22 '. It can be seen here that the plate 22 has depressions 26 which serve to position the ribs 4 of the metal foam core part 2 (cf. FIG. 1).
- Vents - which are preferably implemented directly by the positioning elements 7 - can be omitted if the metal foam core part 2 at least partially borders directly on the casting tool 8, i.e. in the finished rim 1 is accessible from the outside; it is then sufficient for the vent opening 11 in the casting tool 8 at this point so that the expanding gas can escape directly from the core part 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Gears, Cams (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT01905484T ATE253424T1 (de) | 2000-03-09 | 2001-02-26 | Verfahren zum herstellen einer rad-gussfelge und giesswerkzeug hierfür |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT3952000 | 2000-03-09 | ||
AT3952000A AT409728B (de) | 2000-03-09 | 2000-03-09 | Verfahren zum herstellen einer rad-gussfelge und giesswerkzeug hierfür |
PCT/AT2001/000050 WO2001066283A1 (de) | 2000-03-09 | 2001-02-26 | Verfahren zum herstellen einer rad-gussfelge und giesswerkzeug hierfür |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1261445A1 true EP1261445A1 (de) | 2002-12-04 |
EP1261445B1 EP1261445B1 (de) | 2003-11-05 |
Family
ID=3673427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01905484A Expired - Lifetime EP1261445B1 (de) | 2000-03-09 | 2001-02-26 | Verfahren zum herstellen einer rad-gussfelge und giesswerkzeug hierfür |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP1261445B1 (de) |
AT (1) | AT409728B (de) |
AU (1) | AU3348301A (de) |
DE (1) | DE50100907D1 (de) |
DK (1) | DK1261445T3 (de) |
ES (1) | ES2206401T3 (de) |
PT (1) | PT1261445E (de) |
TR (1) | TR200302063T4 (de) |
WO (1) | WO2001066283A1 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT4936U1 (de) | 2000-10-06 | 2002-01-25 | Austria Alu Guss Ges M B H | Rad-gussfelge |
AT500943B1 (de) * | 2004-10-21 | 2007-04-15 | Austria Alu Guss Ges M B H | Giesswerkzeug zur herstellung von aus leichtmetallegierungen gegossenen werkstücken sowie verfahren hiezu |
DE102007046124B4 (de) * | 2007-01-03 | 2012-12-06 | V2 Vorentwicklung & Vertrieb Gmbh | Vorrichtung zum Herstellen eines gegossenen Fahrzeugrades |
AT510737B1 (de) * | 2010-12-02 | 2013-06-15 | Borbet Austria Gmbh | Verfahren zur herstellung eines gusswerkstücks, insbesondere eines gussrads |
US8813821B2 (en) * | 2012-12-05 | 2014-08-26 | Hamilton Sundstrand Corporation | Aerospace sand casting support |
DE102020100696A1 (de) * | 2020-01-14 | 2021-07-15 | Audi Aktiengesellschaft | Verfahren zum Herstellen einer Kraftwagenfelge aus Aluminium oder einer Aluminiumlegierung für ein Rad eines Kraftfahrzeugs sowie entsprechende Kraftwagenfelge |
DE102020100691A1 (de) * | 2020-01-14 | 2021-07-15 | Audi Aktiengesellschaft | Verfahren zum Herstellen einer Kraftwagenfelge aus Aluminium oder einer Aluminiumlegierung für ein Rad eines Kraftfahrzeugs, Vorrichtung zum Herstellen einer Kraftwagenfelge sowie Verfahren zum Herstellen von mehreren Kraftwagenfelgen |
DE102020100689A1 (de) * | 2020-01-14 | 2021-07-15 | Audi Aktiengesellschaft | Verfahren zum Herstellen einer Kraftwagenfelge aus Aluminium oder einer Aluminiumlegierung für ein Rad eines Kraftfahrzeugs sowie Kraftwagenfelge |
DE102020100697A1 (de) * | 2020-01-14 | 2021-07-15 | Audi Aktiengesellschaft | Verfahren zum Herstellen einer Kraftwagenfelge aus Aluminium oder einer Aluminiumlegierung für ein Rad eines Kraftfahrzeugs sowie entsprechende Kraftwagenfelge |
DE102020100700A1 (de) * | 2020-01-14 | 2021-07-15 | Audi Aktiengesellschaft | Verfahren zum Herstellen einer Kraftwagenfelge aus Aluminium oder einer Aluminiumlegierung für ein Rad eines Kraftfahrzeugs sowie entsprechende Kraftwagenfelge |
DE102020100704A1 (de) * | 2020-01-14 | 2021-07-15 | Audi Aktiengesellschaft | Verfahren zum Herstellen einer Kraftwagenfelge aus Aluminium oder einer Aluminiumlegierung für ein Rad eines Kraftfahrzeugs sowie Vorrichtung zum Herstellen einer Kraftwagenfelge |
DE102020100701A1 (de) * | 2020-01-14 | 2021-07-15 | Audi Aktiengesellschaft | Verfahren zum Herstellen einer Kraftwagenfelge aus Aluminium oder einer Aluminiumlegierung für ein Rad eines Kraftfahrzeugs sowie entsprechende Kraftwagenfelge |
DE102020100693A1 (de) * | 2020-01-14 | 2021-07-15 | Audi Aktiengesellschaft | Verfahren zum Herstellen einer Kraftwagenfelge aus Aluminium oder einer Aluminiumlegierung für ein Rad eines Kraftfahrzeugs sowie entsprechende Kraftwagenfelge |
DE102020100705A1 (de) * | 2020-01-14 | 2021-07-15 | Audi Aktiengesellschaft | Verfahren zum Herstellen einer Kraftwagenfelge aus Aluminium oder einer Aluminiumlegierung für ein Rad eines Kraftfahrzeugs sowie entsprechende Vorrichtung zum Herstellen einer Kraftwagenfelge |
DE102020100702A1 (de) * | 2020-01-14 | 2021-07-15 | Audi Aktiengesellschaft | Verfahren zum Herstellen einer Kraftwagenfelge aus Aluminium oder einer Aluminiumlegierung für ein Rad eines Kraftfahrzeugs sowie entsprechende Vorrichtung zum Herstellen einer Kraftwagenfelge |
DE102020100699A1 (de) | 2020-01-14 | 2021-07-15 | Audi Aktiengesellschaft | Verfahren zum Herstellen einer Kraftwagenfelge aus Aluminium oder einer Aluminiumlegierung für ein Rad eines Kraftfahrzeugs sowie entsprechende Kraftwagenfelge |
DE102020100703A1 (de) * | 2020-01-14 | 2021-07-15 | Audi Aktiengesellschaft | Verfahren zum Herstellen einer Kraftwagenfelge aus Aluminium oder einer Aluminiumlegierung für ein Rad eines Kraftfahrzeugs sowie entsprechende Kraftwagenfelge |
DE102022115993A1 (de) | 2022-06-28 | 2023-12-28 | Audi Aktiengesellschaft | Verfahren und Gießform zum Herstellen eines Rads für ein Kraftfahrzeug |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61219458A (ja) * | 1985-03-26 | 1986-09-29 | Nissan Motor Co Ltd | ダイカスト装置 |
US4760874A (en) * | 1986-04-16 | 1988-08-02 | Ube Industries, Ltd. | Method and apparatus for forming disk wheel like formed parts |
KR930002519B1 (ko) * | 1988-07-31 | 1993-04-03 | 아사히 가단데쯔 가부시끼가이샤 | 주조장치, 그 장치의 사용방법, 차량용 휠의 주조장치, 그 장치의 사용방법 및 차량용 휠 |
DE19501508C1 (de) * | 1995-01-19 | 1996-04-25 | Lemfoerder Metallwaren Ag | Bauteil für das Fahrwerk eines Kraftfahrzeuges und Verfahren zur Herstellung eines solchen Bauteils |
DE29723749U1 (de) * | 1997-12-11 | 1999-01-14 | Dr.Ing.H.C. F. Porsche Ag, 70435 Stuttgart | Rad für ein Kraftfahrzeug |
DE19754959C2 (de) * | 1997-12-11 | 2001-05-17 | Porsche Ag | Rad für ein Kraftfahrzeug mit Hohlspeichen |
AT406134B (de) * | 1998-02-04 | 2000-02-25 | Austria Alu Guss Ges M B H | Rad-gussfelge |
DE19826848C5 (de) * | 1998-06-16 | 2006-02-23 | Borbet Gmbh | Leichtmetallrad für Kraftfahrzeuge |
-
2000
- 2000-03-09 AT AT3952000A patent/AT409728B/de not_active IP Right Cessation
-
2001
- 2001-02-26 PT PT01905484T patent/PT1261445E/pt unknown
- 2001-02-26 AU AU33483/01A patent/AU3348301A/en not_active Abandoned
- 2001-02-26 TR TR2003/02063T patent/TR200302063T4/xx unknown
- 2001-02-26 WO PCT/AT2001/000050 patent/WO2001066283A1/de active IP Right Grant
- 2001-02-26 DE DE50100907T patent/DE50100907D1/de not_active Expired - Lifetime
- 2001-02-26 ES ES01905484T patent/ES2206401T3/es not_active Expired - Lifetime
- 2001-02-26 EP EP01905484A patent/EP1261445B1/de not_active Expired - Lifetime
- 2001-02-26 DK DK01905484T patent/DK1261445T3/da active
Non-Patent Citations (1)
Title |
---|
See references of WO0166283A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU3348301A (en) | 2001-09-17 |
DE50100907D1 (de) | 2003-12-11 |
PT1261445E (pt) | 2004-03-31 |
ES2206401T3 (es) | 2004-05-16 |
DK1261445T3 (da) | 2004-02-23 |
AT409728B (de) | 2002-10-25 |
WO2001066283A1 (de) | 2001-09-13 |
ATA3952000A (de) | 2002-03-15 |
TR200302063T4 (tr) | 2004-01-21 |
EP1261445B1 (de) | 2003-11-05 |
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