EP3189909B1 - Vorrichtung und verfahren zum herstellen eines leicht-metallrades - Google Patents

Vorrichtung und verfahren zum herstellen eines leicht-metallrades Download PDF

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Publication number
EP3189909B1
EP3189909B1 EP16002381.8A EP16002381A EP3189909B1 EP 3189909 B1 EP3189909 B1 EP 3189909B1 EP 16002381 A EP16002381 A EP 16002381A EP 3189909 B1 EP3189909 B1 EP 3189909B1
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EP
European Patent Office
Prior art keywords
wheel
freely rotating
stretching
rolls
rotating rolls
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
Application number
EP16002381.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3189909A1 (de
Inventor
Giorgio MUFFATTO
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.)
RONAL AG
Original Assignee
RONAL AG
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Filing date
Publication date
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Application filed by RONAL AG filed Critical RONAL AG
Priority to PL16002381T priority Critical patent/PL3189909T3/pl
Publication of EP3189909A1 publication Critical patent/EP3189909A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B41/00—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/16—Spinning over shaping mandrels or formers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/002—Positioning devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/004—Bending sheet metal along straight lines, e.g. to form simple curves with program control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/26—Making other particular articles wheels or the like
    • B21D53/30—Making other particular articles wheels or the like wheel rims

Definitions

  • the invention relates to a device and a method for producing a light metal wheel from a preform.
  • the invention relates to the production of light alloy wheels, in particular from aluminum or aluminum alloy, by means of flowforming.
  • This is a sub-form of shear forming, while in German different terms such as flow (pressure) rollers, rotary rollers or stretch rollers are used and the latter term should be used here.
  • Stretch rolling is a non-cutting forming process for the final forming of rotating bodies made of light metal, such as aluminum or aluminum alloys, in particular metal wheels.
  • the preform of a wheel with a rotationally symmetrical jacket formation is placed on a simple, rotating tool, a mandrel, which is set in rotation with the preform.
  • several differently shaped stretching rollers engage with radial pressure on the rotationally symmetrical peripheral wall of the Preform and are moved along it, i.e. in an axial component during the rotation of the preform, whereby on the one hand the material is compacted and on the other hand it is stretched and thus deformed by the stretching rollers moving essentially in the axial direction and precisely when a metal wheel is produced Rim of the same.
  • the usually inner rim flange of the wheel to be formed is formed on a shoulder of the rotating mandrel.
  • This machining process in itself a cold forming process, can be carried out at an elevated temperature of up to 350 ° C., whereby it should be noted that the forming process by means of the stretching rollers alone results in heating.
  • Such procedures are basically from the US 2003/0145466 A1 or the ITVI20040061 A known.
  • the disadvantage is that the inner or underside of the wheel to be manufactured is predetermined by the shape of the mandrel and the peripheral edge of the rim flange can possibly only be finished in a complex manner by moving it down with the stretching rollers, which on the one hand requires complicated movement control processes and on the other hand the mandrel can disturb.
  • the EP 1 712 310 and the EP 1 714 714 A1 concern the forming of a snap ring groove in the manufacture of tapered shoulder rims for trucks.
  • Such rims are usually machined in a flow-forming process.
  • a rim blank which as a rule consists of a sheet metal strip rounded to form a hollow cylinder and butt-welded, thus made of steel, is deformed by pressing on pressure rollers.
  • the workpiece is set in rotation about its longitudinal axis.
  • the molding takes place by deforming a groove and then by means of a - acting from the inside - forming element substantially away from the longitudinal axis of the end region of the workpiece around a - provided on the outside of the workpiece wall - a counter-element having a predetermined groove profile. So there is only a reshaping of the sheet metal strip in the area of the snap ring groove to be formed into this.
  • the DE 2 053 005 and the DE 2 231 842 relate to the method and device for the production of tapered shoulder rims per se (as they are then provided with a groove according to the aforementioned publications).
  • axially fixed tools act on the casing wall of the wheel to be produced during operation and in particular - as in the aforementioned publications - profile rollers 14, 15 from the inside on the lower area of the casing wall for producing the rim flange.
  • the flowforming process did not yet exist.
  • the DE 103 22 752 A1 relates to a method for producing workpieces from sheet metal with at least one branch by means of a forming process, whereby, inter alia, rims for motor vehicles are also addressed. But here, too, it is only a question of pure forming in that in the area of a previously introduced bending point, at least one flange pointing away from the plane of the sheet is formed from the sheet metal by means of an attacking forming roller (2-2c), with areas of this flange being fastened differently, i.e. compressed should be and thus have different strengths in the end product. There is also no axial stretching along the wall of the sheet metal jacket here.
  • the WO 2005/065049 A2 refers to the manufacture of a one-piece steel wheel.
  • the process is multi-stage and the individual stages are carried out in various shape-changing processing stages.
  • a short cylinder jacket wall is vertically applied over a cylindrical mandrel by means of rollers that exert radial pressure and move axially.
  • the shape of the rim and its individual sections are made on this by means of other rollers over a contoured mandrel that has been retracted into the interior of the cylinder jacket, which are also located in their working section (rim well 3, tire seat 2 and 4) have to move axially to a limited extent.
  • the inner and outer rim flanges continue to be formed by other roles (these two stages are preceded by further work steps in again other tools). It is essential that the rim flange is not formed by a roller acting in the first-mentioned stage of the stretching, but is formed between rollers / rollers that only act radially against one another, although a non-working feed movement and the two rollers only work radially pressing against one another.
  • the DE 1 452 610 relates to a method of forming an outwardly opening flute on a cylindrical tube.
  • a first step the tube is stretched by means of a first roller along the cylindrical area of a mandrel which has a taper at one end.
  • stretching and shaping processes are separated and are carried out by different tools.
  • the invention is based on the object of creating a method and a device for producing light metal wheels which, while optimizing production, form the inner rim flange in particular better, faster and less expensively.
  • the invention provides a device according to the invention with the features of claim 1 and a method according to the invention with the features of claim 8.
  • the device according to the invention has a mandrel receiving the preform of the wheel and stretching rollers which initially engage in the outer area (which is placed at the top for machining) of a rotationally symmetrical jacket of the preform.
  • radial pressure is exerted with - radial - compression and - axial - stretching - the stretching rollers can be moved along the shell wall.
  • the rim of the wheel is then finally shaped along the mandrel by means of the stretching rollers.
  • the mandrel in the interior of the preform of the wheel or in the interior of the wheel to be produced is a rotationally symmetrical body and has no undercuts in the jacket area; the mandrel preferably widens slightly conically from the outside of the wheel to the inside.
  • the mandrel therefore does not have to be a multi-part body, as would be the case with undercuts, the individual parts of which would then have to be withdrawn by additional hydraulic fasteners to remove the wheel, which makes such a tool construction vulnerable and also the precision of the wheel with regard to the important roundness and can cause imbalances.
  • the mandrel protrudes inside the wheel to be produced to the level of the inner rim flange, but does not reach under it.
  • the device according to the invention is designed so that at least one of the stretching rollers engaging the side of the wheel undertake the (flow) shaping of the wheel jacket over its entire height, including the shaping of the outside of the inner rim flange.
  • the forming can take place as hot or cold forming, the former working with a hot preform and hot tool, the latter using a cold preform and cold tool, which heat up to a certain extent due to the machining process.
  • the former is used in particular for cast preforms, the latter for forged preforms.
  • a device according to the invention can also be designed in that the freely rotating rollers have an axis of rotation inclined at an angle of inclination of 50 ° to 70 ° to an axis of rotation of the preform, in particular the angle of inclination of the axes of rotation of the freely rotating rollers to the axis of rotation of the preform is adjustable. Further developments of the device according to the invention provide that the freely rotating rollers form the rim flange with its jacket wall reach under, in particular the freely rotating rollers are frustoconical and / or the jacket wall of the freely rotating rollers encloses an angle between 20 ° and 40 ° to the axis of rotation of the freely rotating rollers.
  • a profile stretching roller that finally forms a rim flange can also be provided.
  • the method according to the invention provides that the freely rotating rollers rotate about axes that include angles of inclination of 50 ° to 70 ° to the axis of rotation of the preform, with the freely rotating rollers in particular engaging under the lower edge of the preform with its shell, the one Angle of 20 ° to 40 ° to the axis of rotation of the freely rotating rollers includes.
  • the invention in particular creates the possibility of a rapid, precise and optimal design of the inner rim flange of a light metal wheel.
  • the Fig. 1 and 4th show a motor vehicle metal wheel 1 dashed as a preform and drawn with its final contour in a sectional view ( Fig. 4 only in partial representation).
  • the wheel 1 has a rim 1.1 and, on its outside 1a, a wheel disc or a spoke area 1.3 with a hub 1.4. In the inner area of the wheel disc 1.3 outside the hub 1.4, openings 1.5 are provided for fastening the wheel to the vehicle by means of screws.
  • the rim 1.1 has an outer rim flange 1.6 near the wheel disc 1.3 and an inner rim flange 1.7 facing away from the wheel disc 1.3 - on the inside 1b.
  • the jacket of the preform 1.8 extends, in particular in its inner area, radially well beyond the end contour of the wheel.
  • the jacket in the preform 1.8 extends in the axial direction over only part of the height of the finished wheel, preferably over 50% to 75%.
  • the essential tool elements of the device according to the invention for producing such a metal wheel are shown from the preform, namely a simple tool 2 in the form of a mandrel that engages the preform or the wheel, several differently engaging the circumferential wall of the preform or the wheel formed stretching rollers 3, the lower edge of the inner or lower rim edge 1.5 of the almost finished wheel 1 freely rotating rollers 4 reaching under and at least one profile stretching roller 5 ( Fig. 3 , 4th ).
  • the stretching rollers 3 are each rotatable about a substantially vertically extending axis of rotation.
  • the preform of the wheel 1 rests on a simple tool in the form of a mandrel 2 designed as a rotational body, which determines the inner shape of the wheel 1.
  • the mandrel 2 is in one piece. It has no undercuts in the circumferential area and widens slightly conically from the outside 1a of the wheel 1 to its inside 1b, so that the completely formed wheel can be easily removed from the mandrel 2.
  • stretching rollers 3 engage, in particular evenly distributed over the circumference, which, as in the left-hand overlay illustration of the Fig. 1 shown, can be designed differently. They first attack the upper area of the preform of the wheel 1, thereby exerting radial pressure and at the same time driving downwards along the preform of the wheel, whereby the pressure exerted on the later wheel casing or the actual Rim 1.1 of the wheel 1 forming part 1.8 stretch the preform of the wheel downwards and compress it at the same time.
  • the preform of the wheel 1 or the wheel 1 is carried on the one hand by the mandrel 2. This extends over the entire height of the wheel to be produced up to the axial height of the inner rim flange 1.7, but does not reach under the edge, the later inner rim flange 1.7 of the wheel. Rather, this is undercut by additional free-running rollers 4. Preferably, three rollers are arranged, which are provided distributed evenly over the circumference, namely each under a stretching roller 3.
  • FIG. 1 It can be seen, with its axis of rotation 4.1 aligned with the axis of rotation 2.1 of the mandrel 2 and thus of the wheel 1 non-rotatably seated thereon at an angle ⁇ of approximately 60 °.
  • the freely rotating rollers 4 are designed in the shape of a truncated cone and taper from their underside to the upper side, the jacket wall 4.2 enclosing an angle of 20 ° to 30 ° with the axis of rotation 4.1.
  • the freely rotating rollers 4 engage with their jacket wall on the inner underside of the wheel 1 to form the inner rim flange 1.7.
  • the axis of rotation of the freely rotating rollers 4.1 is freely adjustable to a certain extent, for example between 50 ° and 70 ° relative to the axis of rotation 2.1 of the Mandrel 2, so that in this way the inner face of the inner rim flange 1.7 can be adjusted by the angle of incidence of the axis of rotation 4.1.
  • the manufacturing process is essentially the following: First, the preform of the wheel 1 is cast and the connecting pins are removed. The preform is then clamped onto the mandrel 2 and can be heated, ideally not to over 350 °. The stretching rollers 3 then move against the same in the upper region of the preform and, with the exertion of radial pressure, move from the outer rim flange 1.6 down to the inner rim flange 1.7, thereby forming the rim 1.1 and essentially the rim horns 1.6, 1.7. The material of the shell of the wheel is drawn down into the area of the inner rim flange 1.7 on the one hand to form the rim, that is to say stretched, and on the other hand the material of the wheel is compressed.
  • the freely rotating rollers 4 engage there with their shell wall 4.2, while the profile stretching roller 4.5 engages in the space between two freely rotating rollers 4 and exerts radial pressure and in its profile groove 5.1 the inner rim flange 1.7 is shaped and finished.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
EP16002381.8A 2011-10-27 2012-10-24 Vorrichtung und verfahren zum herstellen eines leicht-metallrades Active EP3189909B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16002381T PL3189909T3 (pl) 2011-10-27 2012-10-24 Urządzenie i sposób wytwarzania koła z metalu lekkiego

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102011117034.4A DE102011117034B4 (de) 2011-10-27 2011-10-27 Vorrichtung und Verfahren zum Herstellen eines Metallrades
EP12818482.7A EP2771137B1 (de) 2011-10-27 2012-10-24 Kombination einer vorrichtung und einer vorform und verfahren zum herstellen eines leicht-metallrades
PCT/EP2012/004444 WO2013060451A1 (de) 2011-10-27 2012-10-24 Vorrichtung und verfahren zum herstellen eines leicht-metallrades

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP12818482.7A Division EP2771137B1 (de) 2011-10-27 2012-10-24 Kombination einer vorrichtung und einer vorform und verfahren zum herstellen eines leicht-metallrades
EP12818482.7A Division-Into EP2771137B1 (de) 2011-10-27 2012-10-24 Kombination einer vorrichtung und einer vorform und verfahren zum herstellen eines leicht-metallrades

Publications (2)

Publication Number Publication Date
EP3189909A1 EP3189909A1 (de) 2017-07-12
EP3189909B1 true EP3189909B1 (de) 2020-12-02

Family

ID=47603518

Family Applications (2)

Application Number Title Priority Date Filing Date
EP12818482.7A Active EP2771137B1 (de) 2011-10-27 2012-10-24 Kombination einer vorrichtung und einer vorform und verfahren zum herstellen eines leicht-metallrades
EP16002381.8A Active EP3189909B1 (de) 2011-10-27 2012-10-24 Vorrichtung und verfahren zum herstellen eines leicht-metallrades

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP12818482.7A Active EP2771137B1 (de) 2011-10-27 2012-10-24 Kombination einer vorrichtung und einer vorform und verfahren zum herstellen eines leicht-metallrades

Country Status (9)

Country Link
US (1) US9573179B2 (hu)
EP (2) EP2771137B1 (hu)
DE (1) DE102011117034B4 (hu)
ES (2) ES2854401T3 (hu)
HU (2) HUE053016T2 (hu)
PL (2) PL3189909T3 (hu)
PT (2) PT2771137T (hu)
TW (1) TWI600482B (hu)
WO (1) WO2013060451A1 (hu)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3351313B1 (de) * 2017-01-18 2020-04-15 Leifeld Metal Spinning AG Verfahren und vorrichtung zum drückwalzen

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3282078A (en) 1963-12-23 1966-11-01 Cincinnati Milling Machine Co Method of making grooved hollow article
DE2053005B2 (de) * 1970-10-28 1973-05-30 Leifeld & Co, 4730 Ahlen Verfahren und vorrichtung zur herstellung von schraegschulterfelgen fuer lkw
DE2231842A1 (de) 1972-06-29 1974-01-17 Leifeld & Co Schraegschulterfelge und verfahren zu ihrer herstellung
JPS5263164A (en) * 1975-11-20 1977-05-25 Toshiba Machine Co Ltd Method and device for processing wheel cap
US5531024A (en) * 1994-03-31 1996-07-02 Motor Wheel Corp Method of making a full face wheel
US5454248A (en) * 1994-05-02 1995-10-03 Rays Engineering Co., Ltd. Method of shaping a wheel
US6644083B2 (en) * 2000-06-19 2003-11-11 Macdonald-Miller Incorporated Spin forming a tubular workpiece to form a radial flange on a tubular flange and a bead or thick rim on the radial flange
US6757976B2 (en) * 2002-02-04 2004-07-06 Asa Co. Ltd. Method for manufacturing alloy wheel for automobile
DE10322752B4 (de) * 2003-05-19 2007-05-10 Prof. Dr.-Ing. Dipl.-Wirtsch.-Ing. Peter Groche Verfahren zum Herstellen von Werkstücken aus Blech
EP1701810A4 (en) * 2004-01-07 2008-05-07 Wheels India WHEELS FOR ONE COMPONENT CONSTRUCTION AND MANUFACTURING METHOD THEREFOR
ITVI20040061A1 (it) * 2004-03-19 2004-06-19 Speedline Srl Metodo costruttivo per la realizzazione di ruote per veicoli in lega leggera e ruota cosi' ottenuta
JP2005349455A (ja) * 2004-06-14 2005-12-22 Work:Kk ホイールの製造方法
DE502005001017D1 (de) * 2005-04-13 2007-08-23 Repkon Machine And Tool Indust Verfahren zum Anformen einer Nut
DE502005000979D1 (de) * 2005-04-18 2007-08-16 Repkon Machine And Tool Indust Verfahren zum Formen einer Nut

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
PL3189909T3 (pl) 2021-05-31
ES2854401T3 (es) 2021-09-21
US9573179B2 (en) 2017-02-21
DE102011117034A1 (de) 2013-05-02
WO2013060451A1 (de) 2013-05-02
EP3189909A1 (de) 2017-07-12
DE102011117034B4 (de) 2015-09-17
US20140283572A1 (en) 2014-09-25
EP2771137B1 (de) 2017-03-15
EP2771137A1 (de) 2014-09-03
HUE032294T2 (hu) 2017-09-28
PT3189909T (pt) 2021-01-13
ES2627025T3 (es) 2017-07-26
WO2013060451A8 (de) 2014-05-01
PL2771137T3 (pl) 2017-08-31
HUE053016T2 (hu) 2021-06-28
TW201338889A (zh) 2013-10-01
PT2771137T (pt) 2017-05-15
TWI600482B (zh) 2017-10-01

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