EP0736347A1 - Procédé pour la fabrication d'un élément de transmission denté - Google Patents

Procédé pour la fabrication d'un élément de transmission denté Download PDF

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Publication number
EP0736347A1
EP0736347A1 EP95105204A EP95105204A EP0736347A1 EP 0736347 A1 EP0736347 A1 EP 0736347A1 EP 95105204 A EP95105204 A EP 95105204A EP 95105204 A EP95105204 A EP 95105204A EP 0736347 A1 EP0736347 A1 EP 0736347A1
Authority
EP
European Patent Office
Prior art keywords
mandrel
blank
diameter portion
forming rollers
cylindrical portion
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Withdrawn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
EP95105204A
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German (de)
English (en)
Inventor
Yoshiyuki Yamashina
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.)
Samtech Corp
Original Assignee
Samtech Corp
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 Samtech Corp filed Critical Samtech Corp
Priority to EP95105204A priority Critical patent/EP0736347A1/fr
Publication of EP0736347A1 publication Critical patent/EP0736347A1/fr
Withdrawn legal-status Critical Current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
    • B21H5/00—Making gear wheels, racks, spline shafts or worms
    • B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls
    • B21H5/025—Internally geared wheels
    • 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
    • B21D53/28—Making other particular articles wheels or the like gear wheels
    • 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
    • B21H5/00—Making gear wheels, racks, spline shafts or worms

Definitions

  • This invention relates to a method of manufacturing a toothed transmission element including a cylindrical portion having a plurality of axial teeth formed at least on the inner periphery thereof.
  • An automatic transmission which utilizes the driving force transmitted from a torque converter to actuate a planetary gear type transmission is usually equipped with a hydraulic clutch in the torque transmission path between the torque converter and the planetary gear type transmission.
  • Such a clutch is usually a multiple disk friction clutch.
  • Fig. 11 shows a clutch drum of a conventional clutch of this type.
  • the clutch drum 50 shown comprises an end plate 51 and a cylindrical portion 52 extending from the outer edge of the end plate 52.
  • the cylindrical portion 52 has a plurality of axial teeth 53 in its inner periphery to guide the axial movement of friction disks 54.
  • An object of this invention is to provide a simple and efficient method of manufacturing a toothed transmission element such as a clutch drum.
  • a method of manufacturing a toothed transmission element comprising the steps of clamping a blank between a mandrel formed with a plurality of axial teeth on the outer periphery thereof and a tailstock member arranged so as to be movable toward and away from one end of the mandrel, rotating the blank together with the mandrel and the tailstock member, adjusting the radial positions of a plurality of forming rollers arranged around the tailstock member, and moving the forming rollers in the direction of axis of the mandrel, whereby pressing the outer peripheral portion of the blank against the outer peripheral surface of the mandrel to spread the outer peripheral portion of the blank in the axial direction of the mandrel.
  • a method of manufacturing a toothed transmission element comprising the steps of clamping a blank having an outer peripheral portion between a tailstock member and a mandrel in the form of a stepped shaft comprising a large-diameter portion and a small-diameter portion, the small-diameter portion being formed with a plurality of axial teeth on the outer periphery thereof, rotating the blank together with the mandrel and the tailstock member, adjusting the radial positions of a plurality of forming rollers arranged around the tailstock member, each forming roller comprising a truncated conical portion having an arcuate surface along the edge of the larger end face thereof, and cylindrical portion provided on the larger end face of the truncated conical portion, and moving the forming rollers in the direction of axis of the mandrel, whereby the cylindrical portion of the blank is pressed radially inward by the arcuate surfaces on the truncated conical portions of
  • a method of manufacturing a toothed transmission element comprising the steps of clamping a blank having an outer cylindrical portion between a tailstock member and a mandrel in the form of a stepped shaft comprising a large-diameter portion and a small-diameter portion formed with a plurality of axial teeth on the outer periphery thereof, the large-diameter portion having a cylindrical portion provided along the edge of the end face and formed with a plurality of axial teeth on the inner periphery thereof, rotating the blank together with the mandrel and the tailstock member, adjusting the radial positions of a plurality of forming rollers arranged around the tailstock member, each forming roller having the shape of a truncated cone having an arcuate surface along the edge of the larger end face, and moving the forming rollers in the direction of axis of the mandrel, whereby the cylindrical portion of the blank is pressed radially inward to spread it axially until
  • a transmission element is formed by plastic working, i.e. by spreading a rotating blank in radial and axial directions of the mandrel by pressing the forming rollers.
  • the transmission element thus formed shows high strength because fiber flows are not cut. Also, it can be formed efficiently.
  • Such a transmission element may be formed in a cold or warm environment.
  • Figs. 1 and 2 show a first embodiment of this invention.
  • a forming device comprises a mandrel 1, a tailstock member 10 aligned with the mandrel 1, and a plurality of forming rollers 20 arranged around the tailstock member 10.
  • Axial teeth 2 are formed at equal intervals on the outer periphery of the mandrel 1.
  • the tailstock member 10 is movable toward and away from the mandrel 1 and has a disk-shaped head 11 at the end near the mandrel 1.
  • the forming rollers 20 have an arcuate surface 21 on the outer periphery thereof. They are radially movable toward and away from the tailstock member 10 and also axially movable together with the tailstock member relative to the mandrel 1.
  • the forming rollers 20 may be arranged at equal intervals in a single plane perpendicular to tailstock member 10 or may be arranged at equal intervals but offset from one another in the direction of axis of the tailstock member 10.
  • Blanks 30 to be worked with this forming device include a disk-shaped blank 30 having a boss portion 31 as shown in Fig. 1, and a blank 30 comprising a boss portion 31 and an outer cylindrical portion 32 as shown in Fig. 4.
  • the inner diameter of the cylindrical portion 32 is larger than the diameter of the circle circumscribing the teeth 5 of the mandrel 1.
  • the blank 30 shown in Fig. 1 is clamped between the mandrel 1 and the tailstock member 10 as shown in Fig. 2A and rotated in one direction. Then, after positioning the forming rollers 20 so that the diameter D1 of the circle inscribing the arcuate surfaces 21 is equal to the outer diameter of the end product, the forming rollers 20 are moved axially toward the mandrel 1. The outer-diameter portion of the blank 30 is thus bent along the outer edge of the mandrel 1 by being pushed by the end faces of the forming rollers 20 and also pressed against the outer periphery of the mandrel 1 and stretched by the arcuate surfaces 21 of the forming rollers.
  • Fig. 3 shows the end product thus formed, i.e. a transmission element 40 having teeth 42 on the inner periphery of its cylindrical portion 41.
  • the forming rollers 20 move in the direction of axis of the mandrel 1 while rotating about their own axes by contact with the blank 30.
  • the toothed transmission element is formed by plastic working, it is of higher quality and strength.
  • the cylindrical portion 32 is pressed against the outer periphery of the mandrel 1 with the forming rollers 20 while stretching this portion 32 in the direction of axis of the mandrel 1.
  • Figs. 5A and 5B show a second embodiment of this invention.
  • the mandrel 1 of this embodiment is a stepped shaft comprising a large-diameter portion 3 and a small-diameter portion 4 formed at one end of the large-diameter portion 3.
  • a plurality of axial teeth 5 are formed at equal intervals on the outer periphery of the small-diameter portion 4.
  • the forming rollers 20 each comprise a truncated conical portion 22 and a cylindrical portion 23 formed on the larger end face of the truncated conical portion 22.
  • An arcuate surface 24 is formed on the outer edge of the larger end face of the truncated conical portion 22.
  • the blank 30 is clamped between the mandrel 1 and the tailstock member 10 and rotated in one direction together with the mandrel 1 and the tailstock member 10. Then, after adjusting the radial position of the forming rollers 20 relative to the tailstock member 10, the roller 20 are moved in the direction of axis of the mandrel 1. Thus, the cylindrical portion 32 of the blank 30 is pushed radially inward by the arcuate surfaces 24 of the forming rollers 20, so that the cylindrical portion is pressed against the small-diameter portion 4 and at the same time spread in the axial direction of the small-diameter portion 4.
  • the cylindrical portions 23 of the forming rollers 20 further deform the flange portion 33 to form its outer circumferential surface.
  • Fig. 6 shows a transmission element 40 thus formed having teeth 42 on the inner periphery of the cylindrical portion 41 and a flange 43 on the outer periphery.
  • a plurality of axial protrusions 6 may be formed on the end face of the large-diameter portion 3 of the mandrel.
  • a flanged transmission element 40 formed using this mandrel is shown in Fig. 8. It has radial grooves 44 in the end face of the flange 43. These grooves 44 are used as passages for lubricating oil.
  • Figs. 9A and 9B show a third embodiment of this invention.
  • the mandrel 1 in this embodiment is a stepped shaft comprising a large-diameter portion 3 and a small-diameter portion 4 provided on one end of the large-diameter portion 3.
  • a plurality of axial teeth 5 are formed at equal intervals on the outer periphery of the small-diameter portion 4.
  • the large-diameter portion 3 has a cylindrical portion 7 extending axially from the end face thereof.
  • a plurality of axial teeth 8 are formed at equal intervals on the inner periphery of the cylindrical portion 7.
  • the forming rollers 20 are movable radially toward and away from the tailstock member 10. They have the shape of a truncated cone having an arcuate surface 25 along the edge of the larger end face.
  • the blank 30 is clamped between the mandrel 1 and the tailstock member 10 and rotated in one direction together with the mandrel 1 and the tailstock member 10. Then, after adjusting the radial position of the forming rollers 20 relative to the tailstock member 10, the rollers 20 are moved in the direction of axis of the mandrel 1. Thus, the cylindrical portion 32 of the blank 30 is pushed radially inward by the arcuate surfaces 25 of the forming rollers 20, so that the cylindrical portion is pressed against the small-diameter portion 4 and at the same time spread in the axial direction of the small-diameter portion 4.
  • the flange portion 33 is pressed against the inner periphery of the cylindrical portion 7 of the mandrel 1.
  • Fig. 10 shows a transmission element 40 thus formed. It has teeth 42 and 45 on the inner periphery of the cylindrical portion 41 and on the outer periphery of the flange 43, respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Mechanical Operated Clutches (AREA)
EP95105204A 1995-04-06 1995-04-06 Procédé pour la fabrication d'un élément de transmission denté Withdrawn EP0736347A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95105204A EP0736347A1 (fr) 1995-04-06 1995-04-06 Procédé pour la fabrication d'un élément de transmission denté

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95105204A EP0736347A1 (fr) 1995-04-06 1995-04-06 Procédé pour la fabrication d'un élément de transmission denté

Publications (1)

Publication Number Publication Date
EP0736347A1 true EP0736347A1 (fr) 1996-10-09

Family

ID=8219168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95105204A Withdrawn EP0736347A1 (fr) 1995-04-06 1995-04-06 Procédé pour la fabrication d'un élément de transmission denté

Country Status (1)

Country Link
EP (1) EP0736347A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0882532A2 (fr) * 1997-06-03 1998-12-09 Dynamit Nobel GmbH Explosivstoff- und Systemtechnik Dispositif de fluotournage et procédé pour la fabrication de pièces à denture plate
EP0893177A1 (fr) * 1997-07-19 1999-01-27 Dynamit Nobel GmbH Explosivstoff- und Systemtechnik Procédé pour la fabrication d'une pièce dentée
EP0955110A2 (fr) * 1998-05-07 1999-11-10 Leico GmbH & Co. Werkzeugmaschinenbau Procédé et dispositif pour le fluotournage
EP1004373A1 (fr) * 1998-11-25 2000-05-31 Leico GmbH & Co. Werkzeugmaschinenbau Procédé et dispositif de fluotournage
WO2008011365A2 (fr) * 2006-07-19 2008-01-24 Transform Automotive Llc Liaison par fluoformage d'éléments métalliques et assemblage d'éléments ainsi obtenu
WO2008057194A2 (fr) * 2006-11-07 2008-05-15 The Gates Corporation Procédé de formage d'un engrenage

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1287549B (de) * 1965-03-08 1969-01-23 Zentrale Entwicklung Und Konst Verfahren zum Walzen einer Verzahnung an einem ring- oder scheibenfoermigen Werkstueck
DE3931599A1 (de) * 1989-08-25 1991-02-28 Wf Maschinenbau Blechformtech Verfahren zur herstellung eines innenverzahnten getriebeteiles
EP0568779A1 (fr) * 1992-05-07 1993-11-10 Wf-Maschinenbau Und Blechformtechnik Gmbh & Co. Kg Procédé pour la fabrication d'un organe de transmission
DE4240613A1 (de) * 1992-12-03 1994-06-09 Leifeld Gmbh & Co Topfförmiges Werkstück mit einer axialen Innenverzahnung und einer radialen Stirnverzahnung, Verfahren zur Herstellung des Werkstücks und Vorrichtung zur Durchführung des Verfahrens
EP0605916A1 (fr) * 1993-01-05 1994-07-13 General Motors Corporation Procédé de fabrication d'un carter d'embrayage
DE4314558A1 (de) * 1993-05-04 1994-11-17 Leifeld Gmbh & Co Verfahren zum spanlosen Herstellen eines Außenprofils an einem hohlzylindrischen Körper und zugehörige Vorrichtung
EP0639415A2 (fr) * 1993-08-18 1995-02-22 Herzing + Schroth GmbH & Co. KG Procédé de fabrication d'un corps à symétrie de rotation

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1287549B (de) * 1965-03-08 1969-01-23 Zentrale Entwicklung Und Konst Verfahren zum Walzen einer Verzahnung an einem ring- oder scheibenfoermigen Werkstueck
DE3931599A1 (de) * 1989-08-25 1991-02-28 Wf Maschinenbau Blechformtech Verfahren zur herstellung eines innenverzahnten getriebeteiles
EP0568779A1 (fr) * 1992-05-07 1993-11-10 Wf-Maschinenbau Und Blechformtechnik Gmbh & Co. Kg Procédé pour la fabrication d'un organe de transmission
DE4240613A1 (de) * 1992-12-03 1994-06-09 Leifeld Gmbh & Co Topfförmiges Werkstück mit einer axialen Innenverzahnung und einer radialen Stirnverzahnung, Verfahren zur Herstellung des Werkstücks und Vorrichtung zur Durchführung des Verfahrens
EP0605916A1 (fr) * 1993-01-05 1994-07-13 General Motors Corporation Procédé de fabrication d'un carter d'embrayage
DE4314558A1 (de) * 1993-05-04 1994-11-17 Leifeld Gmbh & Co Verfahren zum spanlosen Herstellen eines Außenprofils an einem hohlzylindrischen Körper und zugehörige Vorrichtung
EP0639415A2 (fr) * 1993-08-18 1995-02-22 Herzing + Schroth GmbH & Co. KG Procédé de fabrication d'un corps à symétrie de rotation

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0882532A2 (fr) * 1997-06-03 1998-12-09 Dynamit Nobel GmbH Explosivstoff- und Systemtechnik Dispositif de fluotournage et procédé pour la fabrication de pièces à denture plate
EP0882532A3 (fr) * 1997-06-03 1999-03-17 Dynamit Nobel GmbH Explosivstoff- und Systemtechnik Dispositif de fluotournage et procédé pour la fabrication de pièces à denture plate
EP0893177A1 (fr) * 1997-07-19 1999-01-27 Dynamit Nobel GmbH Explosivstoff- und Systemtechnik Procédé pour la fabrication d'une pièce dentée
EP0955110A2 (fr) * 1998-05-07 1999-11-10 Leico GmbH & Co. Werkzeugmaschinenbau Procédé et dispositif pour le fluotournage
EP0955110A3 (fr) * 1998-05-07 2000-05-24 Leico GmbH & Co. Werkzeugmaschinenbau Procédé et dispositif pour le fluotournage
EP1004373A1 (fr) * 1998-11-25 2000-05-31 Leico GmbH & Co. Werkzeugmaschinenbau Procédé et dispositif de fluotournage
WO2008011365A2 (fr) * 2006-07-19 2008-01-24 Transform Automotive Llc Liaison par fluoformage d'éléments métalliques et assemblage d'éléments ainsi obtenu
WO2008011365A3 (fr) * 2006-07-19 2008-03-13 Transform Automotive Llc Liaison par fluoformage d'éléments métalliques et assemblage d'éléments ainsi obtenu
WO2008057194A2 (fr) * 2006-11-07 2008-05-15 The Gates Corporation Procédé de formage d'un engrenage
WO2008057194A3 (fr) * 2006-11-07 2008-08-28 Gates Corp Procédé de formage d'un engrenage

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