EP1053109A1 - Cast wheel rim - Google Patents
Cast wheel rimInfo
- Publication number
- EP1053109A1 EP1053109A1 EP99900181A EP99900181A EP1053109A1 EP 1053109 A1 EP1053109 A1 EP 1053109A1 EP 99900181 A EP99900181 A EP 99900181A EP 99900181 A EP99900181 A EP 99900181A EP 1053109 A1 EP1053109 A1 EP 1053109A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cast
- wheel
- molded part
- rim
- light metal
- 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- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
- B60B3/06—Disc wheels, i.e. wheels with load-supporting disc body formed by casting
Definitions
- the invention relates to a cast wheel rim with a light metal rim body designed as a composite body, which has a hub area, a horn area and a wall or rib area located between these areas, e.g. with spokes, on ice.
- the invention further relates to a method for producing such a cast wheel rim.
- rim construction In rim construction it has long been a general effort, cf. e.g. No. 1,544,242 A, to achieve the highest possible strengths with as little mass or material as possible. Accordingly, in order to provide lightweight rims, on the one hand, it was based on special light metals, cf. the conventional cast aluminum or magnesium rims, and on the other hand special profiles were sought in order to obtain sufficient strength values with the desired low use of materials. Examples of such rims can be found in EP 546 307 A, EP 27 272 A, DE 2 063 379 A and US 4 165 131 A. On the other hand, rims designed as composite bodies have also been proposed, in which separately manufactured parts are subsequently connected to one another.
- WO 97/31 792 A describes a rim construction with an extruded, curved rim rim which has a reinforced area in order to establish a connection to a wall part by means of bolts. This is not a cast rim, and the manufacture of the rim is complex.
- US 4 114 953 A discloses a multi-part rim construction with pressed parts which are joined together or with a hub part e.g. can be connected by welding, wherein a filler made of rigid polyurethane foam can be inserted into a cavity between the pressed parts.
- DE 44 21 470 A describes a light metal cast wheel which is cast with hollow spokes, for which purpose cores are used. It is therefore a simple cast rim, but not a composite body.
- the rim according to JP 61/86 0 37 A contains a rim which is produced by extrusion and which is provided with chambers, a subsequent processing of the extruded Parts by rolling etc. is provided.
- DE 34 33 549 A finally discloses a rim or wheel construction, with cast rim parts being described in detail for which honeycomb composite bodies are provided for reinforcement, for example in the form of welded or screwed-on reinforcement ring disks.
- the invention seeks to go new ways in order to achieve higher strengths with even lighter rim bodies; the invention is based on the knowledge that with the open profiles known in the prior art, improvements in strength, if at all, would only be possible with a greater use of materials.
- the cast wheel rim of the type mentioned at the outset is characterized in that at least one molded part is cast in the light metal of the one-piece cast rim body, which has an average specific weight less than that of the light metal used for the casting.
- the above objective is advantageously met, and economically producible profile cross sections are made possible, which allow high strength to be achieved with a low mass.
- the molded part or parts can be extremely lightweight, and they enable the achievement of closed profiles, ie "hollow M profiles, from the cast light metal, so that the high strength can be achieved even with thin-walled structures.
- rim body can, depending on the basic shape - 3 - of the rim body - which can vary in the widest range - one or more radially extending molded part (s) can be cast in to achieve rigid hollow profiles in the wall or rib area. These molded parts can continue into the hub area of the rim body, but full light metal cross sections should expediently be provided at least in the area of the pin bores.
- the circularly closed molded part cast in the horn region is formed in one piece with spoke molded parts running radially inward from it.
- spoke molded parts running radially inward from it.
- the molded part (s) has an average specific weight of less than 1.3 kg / dnA, preferably less than 1 kg / d.
- molded parts made of foamed metal preferably made of foamed aluminum
- these metal foam molded parts, in particular made of aluminum foam have poor heat transfer due to the gas components they contain, so that they are excellent in aluminum or the like. Let the light metal pour in.
- there is their - average - specific weight i.e.
- foam aluminum with a specific weight in the range from 0.3 to 0.7 kg / dm 3 , preferably about 0.5 kg / dm 3 , can advantageously be used.
- honeycomb bodies for the molded parts, e.g. made of steel slats.
- the molded part (s) form a closed, e.g. has or have a substantially square cross section.
- the method according to the invention for producing the present wheel cast rim by casting in a casting tool is characterized in that one or more prefabricated molded part (s) is inserted into the casting tool and therein with the aid of centering pins or the like. is or are fixed, and that the molded part (s) with the light metal, e.g. Aluminum or an aluminum-magnesium alloy, is or will be cast.
- the casting tool itself can - in view of the possible simpler shapes of the rim body - be simple, and the centering of the molded parts, preferably made of metal foam, in particular foam aluminum, in the casting tools with the aid of the centering pins can be accomplished quickly and without problems.
- Suitable recesses for inserting the centering pins can be provided in advance in the molded parts and in the casting tools. After casting, any parts of the centering pins protruding from the outside of the rim body can be ground off.
- the centering pins can be made of steel or ceramic material, generally of a material which is compatible with the light metal of the rims, but which has a higher melting or non-melting material.
- bodies from metal foam in particular from foam aluminum, is in itself a common technique, as is the production of honeycomb structural parts, so that a further explanation can be omitted here.
- Fig.l a sector-shaped section of a cast wheel rim
- FIG. 2 shows a radial section through this cast wheel rim along the line II -II in Fig.l, in the region of a spoke of the cast wheel rim;
- FIG. 3 shows a cross-sectionally offset section, corresponding to the line III-III in FIG. 1, to illustrate the cross section of the cast wheel rim in the region of a recess between the spokes of the cast wheel rim;
- FIG. 4 shows a cross section in the area of a spoke of this wheel cast rim, along the line IV-IV in Fig.l.
- the cast wheel rim 1 (hereinafter referred to as rim), which is illustrated in the drawing and is currently regarded as particularly preferred, consists of a rim body 2 designed as a composite body, which has a hub area 3, a rib area 4 and a horn area 5 with a rim bed 6.
- rim body 2 designed as a composite body, which has a hub area 3, a rib area 4 and a horn area 5 with a rim bed 6.
- bolt holes 7 are provided in a conventional manner for screwing on the rim 1 with the tire, not shown, attached to it.
- the rim body 2 is cast in a conventional manner from light metal; for example, the present rim is a cast aluminum or magnesium rim.
- the light metal is cast in the form of closed "hollow” profiles in the manner of box profiles, whereby high strength values can be achieved.
- the "cavities" in these box profiles or generally in the closed profiles of the rim 1 are filled with lightweight molded parts, which are preferably prefabricated from metal foam, in particular from foam aluminum, and then when the rims are cast 1 are inserted into the casting tool (not shown).
- a one-piece molded part 8 is provided, which is closed in a circle in the horn region at 8 'and which in one piece with radially inwardly projecting in the rib region 4, in the region of the rim spokes 9 Spoke molded parts 8 "is formed.
- the molded part 8, i.e. the circularly closed outer part 8 ′, in its area between the spokes 9, has a smaller cross section compared to the area immediately radially outside the spokes 9, the associated horn area 5 of the rim 1 also having a smaller cross section in these peripheral sections, which connects via transition areas 10 and 11 to the sections having a greater thickness in the area of the spokes 9.
- the molded part 8 can of course also have other shapes, and in particular it is also possible to design the molded parts 8 "in the area of the spokes as to provide separate parts for the tire-shaped molded part 8. It is also conceivable to provide several molded parts next to one another in the rib region 4, within the spokes 9, so that multi-chamber hollow profiles are then formed by the light metal during casting the casting of the lightweight molded parts 8 or 8 ′, 8 ′′ with the light metal closed box profiles are formed, as indicated in FIG. 4 at 12, whereby extraordinarily high strength values can be achieved.
- very thin-walled box profiles 12 can be provided without the strength being adversely affected, and on the other hand the molded parts 8 or 8 ', 8 "can have a significantly lower average specific weight compared to the light metal used for the rim 1 per se, so
- foam aluminum has proven to be particularly advantageous for the production of molded parts 8 or 8 ', 8 ", but it is also a corresponding weight reduction with comparable, similar foamed metals, but also with honeycomb structures in connection with the thin-walled box profiles when pouring into the light metal.
- cross sections can be produced in an economical manner, which through the described closed box section 12 provide a maximum of strength a minimum of light metal mass (and thus with a minimum weight).
- the foamed aluminum can have a specific weight of, for example, 0.3 to 0.7 kg / dm 3 , with good results in practical tests with foamed aluminum with a specific weight of approx. 0.5 kg / dm 3 could be achieved.
- rims 1 During manufacture, comparatively simple shapes can be provided for the rim 1, with in particular no bends or the like. are required in the areas in question, as was intended in the past, in order to increase the strength of the profile areas; accordingly, the casting tools for the rims 1 can be made relatively simple.
- the light metal is then poured into the casting tool, the molded parts 8, 8', 8" are encased in the manner of lost cores.
- the centering pins two of which are schematically indicated in FIG. 2, for example at 13 or 14, remain in the light metal of the rim 1, and any parts protruding beyond the outside of the rim 1 are simply ground off after removal from the mold.
- the molded parts 8, 8 ', 8 are of course to be selected such that they do not melt when poured into the light metal.
- the materials mentioned above namely particularly preferably foam aluminum or metal foam in general, are well suited in so far as they usually are one after their production Have oxide skin, which has a higher melting temperature compared to the light metal of the rim body 2.
- these materials have a poor heat transfer coefficient due to the high gas content, so that such metal foam (foam aluminum) molded parts, as tests have shown, without any problems For example, let it be poured into aluminum or aluminum-magnesium alloys.
- the honeycomb lamellae can also consist of steel and thus have a higher melting point compared to the cast aluminum or the like light metal .
- steel can also be selected as the material for the centering pins 13, 14, but the centering pins 13, 14 can also be made of ceramic material, for example.
- the present rim 1 is particularly suitable for car and truck wheels and for motorcycles, but also for wheels in aircraft construction.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Braking Arrangements (AREA)
- Forging (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0019898A AT406134B (en) | 1998-02-04 | 1998-02-04 | WHEEL CASTING RIM |
AT19898 | 1998-02-04 | ||
PCT/AT1999/000002 WO1999039923A1 (en) | 1998-02-04 | 1999-01-05 | Cast wheel rim |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1053109A1 true EP1053109A1 (en) | 2000-11-22 |
Family
ID=3484094
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99900181A Withdrawn EP1053109A1 (en) | 1998-02-04 | 1999-01-05 | Cast wheel rim |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1053109A1 (en) |
AT (1) | AT406134B (en) |
AU (1) | AU1863899A (en) |
DE (1) | DE29817615U1 (en) |
WO (1) | WO1999039923A1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19926573C2 (en) * | 1997-12-11 | 2003-02-13 | Porsche Ag | Wheel for a motor vehicle |
DE19754959C2 (en) | 1997-12-11 | 2001-05-17 | Porsche Ag | Wheel for a motor vehicle with hollow spokes |
AT406134B (en) * | 1998-02-04 | 2000-02-25 | Austria Alu Guss Ges M B H | WHEEL CASTING RIM |
DE19826848C5 (en) * | 1998-06-16 | 2006-02-23 | Borbet Gmbh | Alloy wheel for motor vehicles |
DE19926575C2 (en) | 1999-06-11 | 2003-04-17 | Porsche Ag | Wheel for a motor vehicle |
DE10009008C1 (en) * | 2000-02-25 | 2001-09-13 | Bayern Freistaat | Process for producing a composite structure with a metal foam core |
AT409728B (en) * | 2000-03-09 | 2002-10-25 | Austria Alu Guss Ges M B H | METHOD FOR PRODUCING A WHEEL CASTING WHEEL AND CASTING TOOL THEREFOR |
AT4936U1 (en) | 2000-10-06 | 2002-01-25 | Austria Alu Guss Ges M B H | RAD-CAST WHEEL |
DE10123899A1 (en) * | 2001-05-16 | 2002-11-21 | Goldschmidt Ag Th | Production of metal molded parts comprises placing a metal body with closed surfaces on all sides and a hollow structure inside into a mold, and filling the remaining mold hollow space with a metal or metal alloy |
DE10310211B3 (en) * | 2003-03-08 | 2004-07-22 | Hoffmann Wärmetechnik GmbH | Non-ferrous metal, especially aluminium cast body with integrated lost core of lower density than the cast material useful in the production of automobile wheel rims |
DE102007027513A1 (en) * | 2007-06-15 | 2008-12-18 | Audi Ag | Method for using the travel of an active strut of a motor vehicle for lifting a tire, and strut and spacer body for performing the method |
AT510737B1 (en) * | 2010-12-02 | 2013-06-15 | Borbet Austria Gmbh | METHOD FOR PRODUCING A MOLDED WORKPIECE, IN PARTICULAR A CAST WHEEL |
DE102017210311A1 (en) * | 2017-06-20 | 2018-12-20 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Process for producing a molded part and molded part |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1544242A (en) | 1922-12-11 | 1925-06-30 | West Steel Casting Company | Cast-metal wheel |
FR2071398A5 (en) | 1969-12-26 | 1971-09-17 | Michelin & Cie | |
US4035028A (en) * | 1975-07-14 | 1977-07-12 | Wilcox Raymond J | Wheel assemblies and components |
US4165131A (en) | 1975-11-05 | 1979-08-21 | Gkn Kent Alloys Limited | Cast vehicle wheels |
DE2602710C2 (en) * | 1976-01-24 | 1977-08-04 | Bbs Kraftfahrzeugtechnik | MOTORCYCLE, IN PARTICULAR MOTORCYCLE, AND METHOD OF MANUFACTURING IT |
US4252378A (en) * | 1979-10-04 | 1981-02-24 | The Firestone Tire & Rubber Company | Wheel laminate with syntactic foam core |
DE2941415A1 (en) | 1979-10-12 | 1981-04-23 | Atlas Aluminium-Fahrzeugtechnik GmbH, 5908 Werdohl | ALLOY CASTING RIM AND METHOD FOR TREATING THE SAME |
DE3433549A1 (en) * | 1983-08-12 | 1985-04-11 | Hideo Higashiosaka Fushimi | Wheel, also steering wheel, for motor vehicles |
JPS6186037A (en) * | 1984-10-01 | 1986-05-01 | Araya Kogyo Kk | Manufacture of hollow section rim |
DE4141464C2 (en) | 1991-12-12 | 1995-10-19 | Porsche Ag | Alloy wheel for a motor vehicle |
EP0552436B1 (en) * | 1992-01-24 | 1996-01-17 | Dr.Ing.h.c. F. Porsche Aktiengesellschaft | Rim for motorvehicle |
DE4421470A1 (en) * | 1994-05-02 | 1996-02-15 | Klaue Hermann | Light alloy cast vehicle wheel equipped with hollow spokes |
JPH091315A (en) * | 1995-04-12 | 1997-01-07 | Asahi Tec Corp | Method for casting wheel for vehicle |
BE1010052A3 (en) * | 1996-03-01 | 1997-12-02 | Fotij Dimitri | Light metal rim ring and method for manufacturing the same. |
DE29723749U1 (en) * | 1997-12-11 | 1999-01-14 | Dr.Ing.H.C. F. Porsche Ag, 70435 Stuttgart | Wheel for a motor vehicle |
AT406134B (en) * | 1998-02-04 | 2000-02-25 | Austria Alu Guss Ges M B H | WHEEL CASTING RIM |
-
1998
- 1998-02-04 AT AT0019898A patent/AT406134B/en not_active IP Right Cessation
- 1998-10-02 DE DE29817615U patent/DE29817615U1/en not_active Expired - Lifetime
-
1999
- 1999-01-05 WO PCT/AT1999/000002 patent/WO1999039923A1/en not_active Application Discontinuation
- 1999-01-05 EP EP99900181A patent/EP1053109A1/en not_active Withdrawn
- 1999-01-05 AU AU18638/99A patent/AU1863899A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO9939923A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATA19898A (en) | 1999-07-15 |
DE29817615U1 (en) | 1998-12-17 |
AU1863899A (en) | 1999-08-23 |
AT406134B (en) | 2000-02-25 |
WO1999039923A1 (en) | 1999-08-12 |
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Legal Events
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