EP0286587B1 - Procédé de profilage d'objets annulaires et dispositif pour la mise en oeuvre dudit procédé - Google Patents

Procédé de profilage d'objets annulaires et dispositif pour la mise en oeuvre dudit procédé Download PDF

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Publication number
EP0286587B1
EP0286587B1 EP88810171A EP88810171A EP0286587B1 EP 0286587 B1 EP0286587 B1 EP 0286587B1 EP 88810171 A EP88810171 A EP 88810171A EP 88810171 A EP88810171 A EP 88810171A EP 0286587 B1 EP0286587 B1 EP 0286587B1
Authority
EP
European Patent Office
Prior art keywords
tool
work
profiling
radius
workpiece
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.)
Expired - Lifetime
Application number
EP88810171A
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German (de)
English (en)
Other versions
EP0286587A2 (fr
EP0286587A3 (en
Inventor
Christian Ragettli
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.)
ROHRKALIBRIER- und BOGENAUTOMATEN ROKABO AG
Original Assignee
ROHRKALIBRIER- und BOGENAUTOMATEN RoKaBo AG
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
Priority claimed from CH1326/87A external-priority patent/CH671894A5/de
Priority claimed from CH165587A external-priority patent/CH673013A5/de
Application filed by ROHRKALIBRIER- und BOGENAUTOMATEN RoKaBo AG filed Critical ROHRKALIBRIER- und BOGENAUTOMATEN RoKaBo AG
Priority to AT88810171T priority Critical patent/ATE78731T1/de
Publication of EP0286587A2 publication Critical patent/EP0286587A2/fr
Publication of EP0286587A3 publication Critical patent/EP0286587A3/de
Application granted granted Critical
Publication of EP0286587B1 publication Critical patent/EP0286587B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
    • B21H1/10—Making articles shaped as bodies of revolution rings of restricted axial length rims for pneumatic tyres
    • 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
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B2035/005—Hydraulic drive motors

Definitions

  • pa pi 2.77. This means that the specific pressure on the outside of the workpiece is 2.77 times greater than the specific pressure on the inside of the workpiece.
  • the uneven surface pressure causes further major disadvantages.
  • the aluminum which is soft compared to steel, reacts strongly to uneven surface pressures, so that external influences such as impacts easily lead to deformation of the rim.
  • the purpose of the invention is now to remedy the disadvantages mentioned above and to propose a method for producing profiled workpieces designed as annular bodies, in particular vehicle rims made of aluminum, so that the disadvantages described at the outset are avoided.
  • This purpose is achieved using the proposed method.
  • the method according to the invention consists in the fact that the ring-shaped body to be machined is set in rotation so as to be freely suspended on the circumference and is profiled at the support point with the same specific pressure both on the inside and on the outside.
  • molten aluminum is either poured into a corresponding permanent metal mold or fed to the mold under high pressure.
  • the profile is formed with the convex outside of one tool and with the concave inside of the other tool, which tools are used together and in each case at the same location on the ring-shaped part will.
  • the device for performing the method has an outer tool with an inner profiling surface and an inner tool arranged inside the outer tool with an outer profiling surface.
  • an aluminum tube is produced with the help of an extrusion press, by means of which a large change in shape is achieved in a single forming step under all-round pressure.
  • a tube is made of initially cast, round strands, which are heated to the press temperature and inserted into the block receiver of an extrusion press and pressed through a die by means of a punch.
  • the result is a tubular structure which has no seam and which is then broken down into individual ring-shaped parts.
  • the ring-shaped parts have a width which corresponds approximately to the width of the ring body which is to be shaped into rims.
  • the ratio of the radius rw of the workpiece 4 to the radius ri of the inner roller 5 can be, for example, 1.5.
  • the inner tool 12 which is not shown in FIG. 5, is mounted on a shaft 16 which extends through the housing 7 and is mounted outside the housing with the aid of two bearings 17 and 18 which are vertically movable in height .
  • a hydraulic motor 20 is flanged by means of a flexible coupling 19.
  • the bearings 17 and 18 are arranged in sliding paths 21 and 22, which in turn are accommodated in bearing guides 23 and 24.
  • the sliding members 21 and 22 are under the influence of hydraulic presses 25 and 26, the piston rods 27, 28 of which are connected to the sliding members 21 and 22.
  • the hydraulic press 25 is dimensioned much larger than the hydraulic press 26, because, due to the lever arm conditions, a much greater pressure must be exerted with the press 25 than with the press 26, the movement of the two presses being coupled and with the aid of Glass scales 29 is monitored.
  • a further shaft 31 serves to receive a side guide 32, by means of which the workpiece 14 is centered in a manner not described in any more detail.
  • the workpiece is transported in and out with the aid of a loading / unloading basket, not shown, which is received on an axially displaceable shaft 33.
  • a pneumatic cylinder 34 with translation is provided for pivoting the side guide 32 and is fastened to the side plate 35.
  • the rims to be machined are fed automatically, the rim transport device required for this being attachable to the flanges 36 of the housing 7.
  • the workpiece to be machined 14 reaches the inner tool 12, which is much smaller in diameter than the smallest rim to be machined.
  • the centering takes place by means of the side guide 32.
  • the shaft 16 assumes a lower position in which the piston rods 27 and 28 are retracted.
  • pressure is exerted by means of the hydraulic presses 25 and 26, so that the piston rods 27 and 28 extend and move the shaft 16 upwards, which always maintains a horizontal position. This can be checked by means of the glass scales 29.
  • the actual profiling takes place in cooperation with the external tool 10 in such a way that the corresponding parts are set in rotation, pressure being exerted at the same time.
  • the piston rods 27 and 28 are retracted so that the finished workpiece rests on the inner tool 12 and is no longer held by the outer tool 10.
  • the finished workpiece is lifted from the inner tool 12 and transferred to a transporter for further conveyance.
  • workpieces designed as ring bodies in particular vehicle rims
  • the surface pressures occurring during the profiling process on the inside and on the outside of the workpiece are the same, so that during machining no problems arise from aluminum rims. In this way, the production of vehicle rims can be simplified, cheaper and accelerated.

Claims (2)

1. Procédé de profilage de pièces réalisées sous la forme de corps annulaires, notamment de fabrication de jantes en aluminium pour véhicules automobiles, à partir d'une ébauche tubulaire qui est façonnée sans joint de soudure et qui est divisée en pièces annulaires élémentaires dont la largeur correspond à la largeur des corps annulaires, procédé selon lequel la pièce annulaire à traiter est mise en rotation en étant soutenue par son contour périphérique de manière à être suspendue librement et est profilée à l'emplacement d'appui, le profilage étant effectué au moyen de la face extérieure convexe d'un premier outil, intérieur, en forme de corps de révolution, ainsi que de la face intérieure concave d'un second outil, extérieur, en forme de corps de révolution, caractérisé en ce que le profilage est effectué avec la même pression spécifique sur la face intérieure et sur la face extérieure, les rayons de l'outil extérieur et de l'outil intérieur appliqués en même temps sur l'emplacement d'appui, ainsi que de la pièce, étant dans des rapports permettant d'obtenir une pression superficielle identique sur la face intérieure et sur la face extérieure de la pièce, lorsqu'elle est déterminée à l'aide de la formule de Herz:
Figure imgb0008
 dans laquelle rm désigne le rayon moyen des deux outils, L (a longueur des corps d'outil, E le module d'élasticité et P la force avec laquelle l'outil extérieur ou l'outil intérieur sont appliqués sur la pièce.
2. Procédé suivant la revendication 1, caractérisé en ce que le profilage s'effectue avec un rayon ri de l'outil intérieur et un rayon ra de l'outil extérieur qui vérifient la relation : r a r i = r w / r i 2 - r w / r i
Figure imgb0009
 dans laquelle rw est le rayon de la pièce.
EP88810171A 1987-04-07 1988-03-17 Procédé de profilage d'objets annulaires et dispositif pour la mise en oeuvre dudit procédé Expired - Lifetime EP0286587B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88810171T ATE78731T1 (de) 1987-04-07 1988-03-17 Verfahren zum profilformen von als ringkoerper ausgebildeten werkstuecken und einrichtung zur ausuebung des verfahrens.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH1326/87A CH671894A5 (en) 1987-04-07 1987-04-07 Aluminium car wheel rims mfr
CH1326/87 1987-04-07
CH1655/87 1987-04-30
CH165587A CH673013A5 (en) 1987-04-30 1987-04-30 Aluminium car wheel rims mfr

Publications (3)

Publication Number Publication Date
EP0286587A2 EP0286587A2 (fr) 1988-10-12
EP0286587A3 EP0286587A3 (en) 1990-07-11
EP0286587B1 true EP0286587B1 (fr) 1992-07-29

Family

ID=25687342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88810171A Expired - Lifetime EP0286587B1 (fr) 1987-04-07 1988-03-17 Procédé de profilage d'objets annulaires et dispositif pour la mise en oeuvre dudit procédé

Country Status (7)

Country Link
US (1) US4909056A (fr)
EP (1) EP0286587B1 (fr)
JP (1) JPS63264230A (fr)
KR (1) KR880012278A (fr)
CN (1) CN88101904A (fr)
CA (1) CA1295855C (fr)
DE (2) DE3717423A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1236712B (it) * 1989-11-15 1993-03-26 Procedimento e apparecchiatura per la produzione di tubi in lega leggera a diametro maggiorato a partire da tubi a diametro inferiore.
US5557981A (en) * 1993-05-25 1996-09-24 Tamco Limited One-piece gearshift lever with cold formed end
ITTO20010665A1 (it) * 2001-07-09 2003-01-09 Esam Spa Procedimento per la produzione di un cerchio per la ruota di un veicolo.
EP1621269B1 (fr) * 2003-07-25 2009-08-26 M. H. Center Limited Procede de fabrication d'une piece a roue interieure et machine enrouleuse
DE102005028828B3 (de) * 2005-06-15 2006-12-21 Getrag Synchrontechnik Gmbh Verfahren und Vorrichtung zum Herstellen von Metallringen
CN103157716A (zh) * 2013-04-07 2013-06-19 吉林大学 内增强外减薄筒形件旋压成形设备

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH198052A (de) * 1935-12-23 1938-05-31 Geigy Ag J R Verfahren zur Darstellung eines quaternären Aminoessigsäureamidderivates.
DE874132C (de) * 1951-12-29 1953-04-20 Duerener Metallwerke Ag Verfahren zur Herstellung nahtloser Felgen aus Leichtmetall
DE2002204A1 (de) * 1970-01-19 1971-07-29 Seybold Rolf Dr Ing Walzwerk zum Walzen von Ringprofilen
FR2195491B1 (fr) * 1972-08-09 1975-03-07 Roulements Soc Nouvelle
US3855833A (en) * 1972-10-17 1974-12-24 Formflo Ltd Rolling machines
FR2407033A1 (fr) * 1977-10-31 1979-05-25 Honda Motor Co Ltd Procede de fabrication de jantes de roues sans soudure
GB2007134B (en) * 1977-11-04 1982-03-10 Honda Motor Co Ltd Apparatus for roll-forming seamless annular products
DE3019723A1 (de) * 1980-05-23 1981-12-03 Hans J. Ing.(grad.) 7336 Uhingen Wissner Maschinenanlage zum herstellen von kfz-raedern
JPS5825835A (ja) * 1981-08-10 1983-02-16 Honda Motor Co Ltd リムの製造方法

Also Published As

Publication number Publication date
DE3717423C2 (fr) 1991-04-11
EP0286587A2 (fr) 1988-10-12
EP0286587A3 (en) 1990-07-11
KR880012278A (ko) 1988-11-26
CA1295855C (fr) 1992-02-18
DE3717423A1 (de) 1988-10-27
JPS63264230A (ja) 1988-11-01
DE3873134D1 (de) 1992-09-03
US4909056A (en) 1990-03-20
CN88101904A (zh) 1988-11-02

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