EP1778424A1 - Procede et dispositif pour fabriquer un logement de jante par formage a froid - Google Patents

Procede et dispositif pour fabriquer un logement de jante par formage a froid

Info

Publication number
EP1778424A1
EP1778424A1 EP05772388A EP05772388A EP1778424A1 EP 1778424 A1 EP1778424 A1 EP 1778424A1 EP 05772388 A EP05772388 A EP 05772388A EP 05772388 A EP05772388 A EP 05772388A EP 1778424 A1 EP1778424 A1 EP 1778424A1
Authority
EP
European Patent Office
Prior art keywords
bed
flow
spinning
longitudinal axis
flared
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Withdrawn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
EP05772388A
Other languages
German (de)
English (en)
Inventor
Khalid Tachi
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.)
Fontijne Grotnes BV
Original Assignee
Fontijne Grotnes BV
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 Fontijne Grotnes BV filed Critical Fontijne Grotnes BV
Publication of EP1778424A1 publication Critical patent/EP1778424A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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

Definitions

  • the invention relates to a method for manufacturing a substantially rotationally symmetric rim bed having a wall thickness varying along the longitudinal axis by means of cold forming.
  • Such a method is known from WO 2004/035243 and is used for manufacturing a so-called weight-optimized rim bed for a rim for a tire.
  • the thickness of the rim bed varies along the longitudinal axis. Then, at different locations along the longitudinal axis, the thickness of the rim bed can be chosen such that this is just sufficient for absorbing the local loads.
  • the rim bed may, for instance, be chosen so as to be relatively thick near the center of its axial length, in order to weld the rim bed there with the disk of the rim. In the adjacent areas, the thickness of the rim bed can then, for instance, be chosen so as to be considerably smaller, whereas the thickness closer to the sides of the rim is usually chosen so as to be larger.
  • the cylindrical steel bed is pre -pressed from the outsides inwards to the center by means of flow-spinning.
  • the more outer parts of the bed are brought to a nominal thickness and any excess material is brought to the center of the length of the longitudinal axis and the bed is pre-profiled.
  • the bed is stretched from the center axially outwards towards the sides at locations where the thickness of the rim bed needs to be reduced.
  • the invention contemplates a method of the type stated in the opening paragraph, with which, wile maintaining the advantages, these drawbacks can be prevented.
  • the invention provides a method for manufacturing a substantially rotationally symmetric rim bed having a wall thickness varying along the longitudinal axis by means of cold forming, wherein the side walls of a substantially cylindrical metal bed having a substantially constant wall thickness are flared radially outwards in a pressing operation, and wherein the wall thickness of the flared side walls is varied along the longitudinal axis by means of flow -spinning, with axial stretching and profiling of the sides.
  • the bed can be pre-profiled, or even finally profiled, in one flow-spinning step without dressing of the sides being necessary.
  • the material of the bed can move freely in feeding direction.
  • the flared side walls of the bed can be pressed from a free position onto a mandrel.
  • the material still to be deformed runs clear of the mandrel and does not run against a stop in feeding direction, which yields a favorable interplay of forces.
  • a removing operation can be omitted in forming the cylindrical bed into a brim bed.
  • the bed is pressed down on a mandrel near the center area of the length of the longitudinal axis.
  • the bed can be positioned well, so that, during further flow -spinning, a high size and form accuracy can be achieved.
  • the bed is axially stretched, radially thinned and profiled from the center area of the longitudinal axis in two opposite, outwardly directed movements with radial pressing down on a mandrel.
  • the flow-spinning is carried out in axially outwardly directed basic movements from the center area of the longitudinal axis of the bed towards the respective sides, while the still loose material to be profiled is pressed down on the mandrel.
  • the pre-profiled, flow-spun bed can also be rolled to a rim bed by means of roll forming.
  • radial expansion of the bed only takes place after flow-spinning or after the profiling step following flow -spinning.
  • the invention further relates to an apparatus for manufacturing a substantially rotationally symmetric rim bed having a wall thickness varying along the longitudinal axis by means of cold forming, wherein a substantially cylindrical metal bed having a substantially constant wall thickness is provided with sides flared radially outwards in a pressing operation, and wherein the wall thickness of the flared sides is varied along the longitudinal axis by means of flow -spinning, with axial stretching and profiling of the sides.
  • the apparatus is preferably provided with a flow-spinning station for profiling and axially stretching the flared bed with radial pressing down, and with a pressing station for radially outward flaring of the sides of a cylindrical bed, while the flow -spinning station connects downstream to the pressing station.
  • Fig. 1 shows a flow diagram of a production line for a rim bed according to the invention
  • Fig. 2A shows a schematic longitudinal cross-section of the flared cylindrical bed having a thickness substantially constant along the longitudinal axis
  • Fig. 2B shows a schematic longitudinal cross -section of a bed which is pre-profiled by means of flow-spinning on the basis of Fig. 2A, where it is clearly visible that the thickness of the bed varies along the longitudinal axis 1;
  • Fig. 3 shows a schematic longitudinal cross-section of a pressing station for radially outward flaring of the side walls of a cylindrical bed
  • Figs. 4A and 4B show two schematic longitudinal cross -sections of a flow-spinning station during fixing and stretching/profiling the bed with flared sides, respectively;
  • Fig. 5A shows a schematic side elevational view of three successive roll formers
  • Fig. 5B shows a schematic longitudinal cross -section of a roll former in which a pre-profiled bed is profiled
  • Fig. 6 shows a schematic side elevational view of a radial expander.
  • FIG. 1 schematically shows a flow diagram for a production line P for a rim.
  • metal strips are cut to length in a first step 1.1 and formed into a cylindrical bed in a second group of steps 1.2.
  • the strip is successively coiled (1.2.1) and its front ends are welded to each other (1.2.2), after which the weld is dressed (1.2.3).
  • the cylindrical rim bed having a constant wall thickness formed in part 1 is formed into a profiled rim bed in a profiling line (2.1) and then tested for leakage and provided with a valve hole (2.2).
  • the profiling takes place by means of cold forming of the material, i.e. the material is not melted and no removing takes place.
  • the side walls of the bed are flared radially outwards to the basic form shown in Fig. 3 in an axially inwardly directed pressing operation with the aid of mandrels.
  • the wall thickness of the flared bed is varied along the longitudinal axis by means of flow -spinning with simultaneous pre-profiling of the bed.
  • the pre-profiled bed is profiled to a rim bed by means of roll formers, after which the profiled bed is radially expanded to the desired size in a fourth processing station 2.1.4.
  • the rim bed is ready to be assembled with the disk to a rim in an assembly part 3 of the production line.
  • the disk is connected with the rim bed at a predetermined location along the longitudinal axis.
  • Fig. 2A a longitudinal cross-section of the flared cylindrical bed 10 having a constant diameter along the longitudinal axis is shown.
  • Fig. 2B the pre-profiled bed 20 is shown, while it is clearly visible that the thickness t of the bed varies over the length of the longitudinal axis 1.
  • FIG. 4A the flow-spinning station 2.1.2 is schematically shown.
  • the flow-spinning station is provided with two rotatably arranged mandrels HA, HB which are each axially slidable along the longitudinal axis 1 of the flared bed 10.
  • the mandrels 11 are each placed from a side 12A, 12B of the flared bed 10 to the center area M of the length of the longitudinal axis 1 of the bed.
  • the bed is clamped at its sides 12A, 12B with the aid of slidable stop collars 14.
  • the flow-spinning station further comprises one or more rollers 13 which can move radially with respect to the longitudinal axis of the bed 10 and which are further translatable with respect to the longitudinal axis of the bed 10.
  • the rollers 13 are further rotatably arranged with respect to the flared bed 10.
  • the rollers 13 and/or the flared bed 10 can rotate with respect to the fixed world during production.
  • Fig. 4A shows how, in a first processing step, the flared bed 10 is pressed down on the mandrels HA, HB near the center area M of the length 1 of the longitudinal axis of the bed 10 in a first flow -spinning step.
  • the thickness t of the center area M remains substantially equal.
  • the material of the flared side of the bed 10 is pressed down from the free position on the mandrel 11 by the rollers 13A, 13B, so that the side wall of the bed 10 is pre-profiled to the pre-profiled bed 20 shown in Fig. 2B.
  • the thickness t only varies little over the longitudinal axis 1. It will be clear that, in practice, the thickness variation may be greater or smaller than shown herein. Also, more or fewer areas having different thicknesses can be formed than shown herein.
  • the bed material flows outwards with respect to the center of the longitudinal axis towards the side.
  • the sides of the bed 12A, 12B can be supported by means of the slidable stop collars 14.
  • Fig. 4B shows that the slidable stop collars do not support the sides 12A, 12B.
  • the stop collars 14 are again brought into contact with the sides 12A, 12B, after which the mandrels HA, HB are axially withdrawn. With axial withdrawal of the stop collars 14, the pre -profiled bed 20 can then be removed. So, in the second processing step shown in Fig. 4B, from the center, two successive, sideward flow-spinning operations are carried out. It is of course possible to carry out flow-spinning operations from the center to both sides simultaneously.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
  • Extrusion Of Metal (AREA)

Abstract

La présente invention est relative à un procédé pour fabriquer un logement de jante à rotation sensiblement symétrique présentant une épaisseur de paroi variant le long de l'axe longitudinal par formage à froid, au cours duquel les parois latérales d'un logement métallique sensiblement cylindrique présentant une épaisseur de paroi substantiellement constante sont évasées radialement vers l'extérieur au cours d'une opération de pressage, et au cours duquel l'épaisseur de paroi des parois latérales évasées est modifiée le long de l'axe longitudinal par centrifugation, avec étirement axial et profilage des côtés. L'invention est en outre relative à un dispositif pour fabriquer un logement de jante au moyen d'un formage à froid.
EP05772388A 2004-08-06 2005-08-05 Procede et dispositif pour fabriquer un logement de jante par formage a froid Withdrawn EP1778424A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1026796A NL1026796C2 (nl) 2004-08-06 2004-08-06 Werkwijze en inrichting voor het door middel van koude vervorming vervaardigen van een velgring.
PCT/NL2005/000575 WO2006014110A1 (fr) 2004-08-06 2005-08-05 Procede et dispositif pour fabriquer un logement de jante par formage a froid

Publications (1)

Publication Number Publication Date
EP1778424A1 true EP1778424A1 (fr) 2007-05-02

Family

ID=34974401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05772388A Withdrawn EP1778424A1 (fr) 2004-08-06 2005-08-05 Procede et dispositif pour fabriquer un logement de jante par formage a froid

Country Status (8)

Country Link
US (1) US20090126443A1 (fr)
EP (1) EP1778424A1 (fr)
JP (1) JP2008509005A (fr)
CN (2) CN101966547A (fr)
DE (1) DE202005021881U1 (fr)
NL (1) NL1026796C2 (fr)
RU (1) RU2392081C2 (fr)
WO (1) WO2006014110A1 (fr)

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RU2503518C1 (ru) * 2012-06-07 2014-01-10 Закрытое акционерное общество "Челябинский опытный завод" Способ изготовления деталей типа полых тел вращения с переменной жесткостью по сечению
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DE202016009191U1 (de) 2016-09-16 2023-08-25 Maxion Wheels Holding Gmbh Steilschulterfelge und Fahrzeugrad hiermit für Nutzfahrzeuge
DE102016117510A1 (de) * 2016-09-16 2018-03-22 Maxion Wheels Germany Holding Gmbh Verfahren zur Herstellung von Steilschulterfelgen, Steilschulterfelge und Fahrzeugrad hiermit für Nutzfahrzeuge
CN114029745B (zh) * 2021-10-22 2023-09-19 定南色耐特智能科技有限公司 适用于不同偏距轮辋的加工设备

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Also Published As

Publication number Publication date
DE202005021881U1 (de) 2011-02-10
US20090126443A1 (en) 2009-05-21
NL1026796C2 (nl) 2006-02-07
RU2392081C2 (ru) 2010-06-20
RU2007108556A (ru) 2008-09-20
WO2006014110A1 (fr) 2006-02-09
CN101043958A (zh) 2007-09-26
JP2008509005A (ja) 2008-03-27
CN101966547A (zh) 2011-02-09

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