EP0490840A1 - Verfahren und Vorrichtung zur Herstellung einer Nabe aus einer Metallscheibe oder dgl - Google Patents

Verfahren und Vorrichtung zur Herstellung einer Nabe aus einer Metallscheibe oder dgl Download PDF

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Publication number
EP0490840A1
EP0490840A1 EP91830549A EP91830549A EP0490840A1 EP 0490840 A1 EP0490840 A1 EP 0490840A1 EP 91830549 A EP91830549 A EP 91830549A EP 91830549 A EP91830549 A EP 91830549A EP 0490840 A1 EP0490840 A1 EP 0490840A1
Authority
EP
European Patent Office
Prior art keywords
tool
disc
chuck
axis
slide
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Withdrawn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
EP91830549A
Other languages
English (en)
French (fr)
Inventor
Franco Magnoni
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.)
Mta Di Bompani Ivaldo & C SNC
Original Assignee
Mta Di Bompani Ivaldo & C SNC
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 Mta Di Bompani Ivaldo & C SNC filed Critical Mta Di Bompani Ivaldo & C SNC
Publication of EP0490840A1 publication Critical patent/EP0490840A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B21H1/02—Making articles shaped as bodies of revolution discs; disc wheels
    • B21H1/04—Making articles shaped as bodies of revolution discs; disc wheels with rim, e.g. railways wheels or pulleys

Definitions

  • Object of the present invention is a procedure and means to realise a hub from a metal disc or similar.
  • the invention finds application in the production of wheels, pulleys and similar obtained by starting from metal discs and subjecting them to plastic deformation.
  • the problem of realising, in such types of wheel, a hub necessary for permitting of coupling the wheel on to shafts or pivots is solved with types of solutions that increase total production costs considerably.
  • One of the most frequent solutions is to realise the wheelhub or pulley hub, bored into the metal disc, by means of use of a tubular element or bushing which can be solidly connected to the body of the wheel or pulley by means of traditional-type welding or by forced coupling with the shaft or pivot predisposed.
  • Other variants envisage the application of the said bush by means of friction-welding processes.
  • the present invention as characterised in the claims which follow proposes to solve the above-described problem without resorting to the use of hubs or bushings prepared independently, whose application requires operations which render the production process complicated and therefore production costs high.
  • 1 indicates a fixed frame on which a principal chuck 2 is mounted, which principal chuck 2 is commanded to rotate about a fixed vertical axis by a motor 3, to which it is connected by means of a mechanical transmission of the chain type 4.
  • the chuck 2 is equipped with a self-centering mounting device 5 predisposed and equipped to grip metal discs 6 at their edges.
  • a strong transversal slide 7 is slidingly driven in a perpendicular direction to the axis of the chuck 2 along horizontal guides 8. The sliding movements of the slide 7 are commanded by a double-acting hydraulic cylinder 9.
  • a turning head 10 is mounted on the slide 7, which turning head 10 has its rotation axis parallel to the rotation axis of the principal chuck 2.
  • a vertical guide 11 is also mounted, on which vertical guide 11 a vertical slide 12 is vertically slidably mounted and has a coalligned counterhead 13, that is, coaxially arranged with the turning head 7.
  • the vertical slide 12 is vertically slidably driven by means of a double-action hydraulic cylinder 14 whose stem constitutes the said vertical guide 11.
  • the turning head 10 and the relative counterhead 13 are positioned, with respect to the principal chuck 2, in such a way that their common axis is comprised inside the cavity existing internally to the said principal chuck 2.
  • the turning head 10 and the counterhead 13 are arranged in such a way as to permit of rotatable coupling with the two ends of a toolhead shaft 15 on which a tool 16 is arranged, said tool 16 being a knife or circular cutter 17 conformed and of such a size as to be able to penetrate into the width of the metal sheet constituted by the disc 6, so that a partial separation into two sheets 18 is produced.
  • the tool 16 is shaped in such a way as to present on both sides of the circular cutter 17 two turning surfaces constituted by the flanks 20 of the said circular cutter 17, which flanks 20 are shaped gradually curvedly towards the central cylindrical body of the said tool 16 where the end at two coaxial portions of cylindrical surface 22.
  • the said cylindrical surfaces 22 are simply two portions of the external cylindrical surface of the tool 16 itself, solid with the toolhead shaft 15.
  • the profile of the two flanks 20, observable in any axial section of the said tool comprises a section of curve which has its concavity externally facing.
  • the metal disc 6 is placed on the principal chuck 2 and gripped by the self-centring gripping device 5 in such a way that it is perfectly solid to the check 2.
  • the disc 6 has a central hole 19 which hole's 19 diameter is slightly greater than that of the circular cutter 17, in order to permit of the cutter's 17 free introduction internally to the hole 19.
  • the tool 16 is positioned so that the circular cutter 17 is located before the edge of the central hole 19 at the half-point of the width of the disc 6. The interaction between the tool 16 and the disc 6 happens when the said disc 6 is placed solidly in rotation by the principal chuck 2 at a pre-established speed.
  • FIGS. 3 and 4 part of a second embodiment is represented, which envisages the use of a hollow chuck 30, driven to rotate about a fixed axis and having coupled internally to it with free relative rotation a tubular cylindrical element (bushing) 31.
  • the free relative rotation is guaranteed by bearings 26.
  • the bushing 31 has in its turn a cylindrical cavity 32 which is not coaxial in which a toolhead shaft 33, also freely rotatable, is coupled.
  • the toolhead shaft 33 is predisposed to receive a projectingly mounted tool 16'.
  • said toolhead shaft 33 is equipped with a hollow cylindrical housing 35 which has a parallel axis to that of the toolhead shaft 33, but which is eccentrically arranged, with a pre-established eccentricity with respect to the said toolhead shaft 33.
  • the tool 16' is equipped with a cylindrical spigot 34 predisposed for coupling internally to the said cylindrical housing 35 by means of the interpositioning of bearings 27.
  • the metal disc 6 is gripped on the chuck 30 by means of a sort of counterchuck 36 coaxially arranged in front of the chuck 30.
  • the chuck 30 and the counterchuck 36 rotate solidly and freely with respect to the tubular element 31, which tubular element 31 is rotatingly independent of said chucks 36 and 30.
  • the radial advancement of the tool 16' is obtained in a very simple way, gradually realising a relative rotation between the toolhead shaft 33 and the tubular element 31 through means not indicated in the figures.
  • a relative rotation of the toolhead shaft 33 with respect to the tubular element 31 produces a variation in the total eccentricity of axis of the tool 16' with respect to the rotation axis of the hollow chuck 30.
  • the last embodiment illustrated is particularly suitable for the making of hubs of small diameter and in any case for a first cutting operation beginning from an initial hole 19, of small dimensions, arranged on the metal disc 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Materials For Photolithography (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
EP91830549A 1990-12-12 1991-12-09 Verfahren und Vorrichtung zur Herstellung einer Nabe aus einer Metallscheibe oder dgl Withdrawn EP0490840A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4016790 1990-12-12
IT04016790A IT1242945B (it) 1990-12-12 1990-12-12 Procedimento e mezzi per realizzare un mozzo in un disco di lamiera o simile

Publications (1)

Publication Number Publication Date
EP0490840A1 true EP0490840A1 (de) 1992-06-17

Family

ID=11248927

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91830549A Withdrawn EP0490840A1 (de) 1990-12-12 1991-12-09 Verfahren und Vorrichtung zur Herstellung einer Nabe aus einer Metallscheibe oder dgl

Country Status (3)

Country Link
EP (1) EP0490840A1 (de)
CA (1) CA2057182A1 (de)
IT (1) IT1242945B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5518503A (en) * 1994-02-09 1996-05-21 Rooney; Christopher F. Oral examination tongue depressor
US5979203A (en) * 1998-02-19 1999-11-09 Radocaj; Mijo Apparatus for spin-forming a circular body from a flat blank metal workpiece
WO2001028709A1 (en) * 1999-10-19 2001-04-26 The Gates Corporation Internal spun hub and method of making same

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE172666C (de) *
DE485065C (de) * 1928-07-13 1929-10-26 Friedrich Im Schlaa Verfahren und Werkzeug zur Herstellung von Formstuecken aus gelochten Blechen oder hohlen Vorwerkstuecken unter Verwendung eines mit Rille versehenen Aufwalzdornes
FR879800A (fr) * 1940-08-17 1943-03-04 Ringfeder Gmbh Dispositif et procédé de fabrication de bagues métalliques et bagues métalliques résultant de l'application de ce dispositif et de ce procédé
FR2040631A5 (en) * 1969-04-08 1971-01-22 Cordonnier Jean Rolling mill for rolling circular products
US3758930A (en) * 1971-11-18 1973-09-18 Frost Eng Prod Inc Method of making hub or bearing housing, and pulley
FR2195491A1 (de) * 1972-08-09 1974-03-08 Roulements Soc Nouvelle
DE2431935A1 (de) * 1974-07-03 1976-01-22 Leifeld & Co Verfahren zur herstellung von lagerschalen fuer kugellager
GB2007134A (en) * 1977-11-04 1979-05-16 Honda Motor Co Ltd Apparatus for roll-forming seamless annular products
EP0034806A1 (de) * 1980-02-20 1981-09-02 Bruno Jakob Brück Ringwalzwerk
US4404829A (en) * 1980-01-10 1983-09-20 Vanco Dorakovski Method and apparatus for the manufacture of pulleys
DE3237295A1 (de) * 1982-10-08 1984-04-12 Stahlwerke Plate GmbH & Co KG, 5880 Lüdenscheid Ringwalzwerk

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE172666C (de) *
DE485065C (de) * 1928-07-13 1929-10-26 Friedrich Im Schlaa Verfahren und Werkzeug zur Herstellung von Formstuecken aus gelochten Blechen oder hohlen Vorwerkstuecken unter Verwendung eines mit Rille versehenen Aufwalzdornes
FR879800A (fr) * 1940-08-17 1943-03-04 Ringfeder Gmbh Dispositif et procédé de fabrication de bagues métalliques et bagues métalliques résultant de l'application de ce dispositif et de ce procédé
FR2040631A5 (en) * 1969-04-08 1971-01-22 Cordonnier Jean Rolling mill for rolling circular products
US3758930A (en) * 1971-11-18 1973-09-18 Frost Eng Prod Inc Method of making hub or bearing housing, and pulley
FR2195491A1 (de) * 1972-08-09 1974-03-08 Roulements Soc Nouvelle
DE2431935A1 (de) * 1974-07-03 1976-01-22 Leifeld & Co Verfahren zur herstellung von lagerschalen fuer kugellager
GB2007134A (en) * 1977-11-04 1979-05-16 Honda Motor Co Ltd Apparatus for roll-forming seamless annular products
US4404829A (en) * 1980-01-10 1983-09-20 Vanco Dorakovski Method and apparatus for the manufacture of pulleys
EP0034806A1 (de) * 1980-02-20 1981-09-02 Bruno Jakob Brück Ringwalzwerk
DE3237295A1 (de) * 1982-10-08 1984-04-12 Stahlwerke Plate GmbH & Co KG, 5880 Lüdenscheid Ringwalzwerk

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5518503A (en) * 1994-02-09 1996-05-21 Rooney; Christopher F. Oral examination tongue depressor
US5979203A (en) * 1998-02-19 1999-11-09 Radocaj; Mijo Apparatus for spin-forming a circular body from a flat blank metal workpiece
WO2001028709A1 (en) * 1999-10-19 2001-04-26 The Gates Corporation Internal spun hub and method of making same

Also Published As

Publication number Publication date
IT9040167A1 (it) 1992-06-13
IT9040167A0 (it) 1990-12-12
IT1242945B (it) 1994-05-18
CA2057182A1 (en) 1992-06-13

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