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WO2007128359A1 - Procédé de fabrication d'un élément de transmission - Google Patents

Procédé de fabrication d'un élément de transmission Download PDF

Info

Publication number
WO2007128359A1
WO2007128359A1 PCT/EP2007/001436 EP2007001436W WO2007128359A1 WO 2007128359 A1 WO2007128359 A1 WO 2007128359A1 EP 2007001436 W EP2007001436 W EP 2007001436W WO 2007128359 A1 WO2007128359 A1 WO 2007128359A1
Authority
WO
WIPO (PCT)
Prior art keywords
toothing
transmission component
sheet metal
cold rolling
metal blank
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.)
Ceased
Application number
PCT/EP2007/001436
Other languages
German (de)
English (en)
Inventor
Cornelius Hentrich
Volker Keck
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
Daimler 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
Application filed by DaimlerChrysler AG, Daimler AG filed Critical DaimlerChrysler AG
Publication of WO2007128359A1 publication Critical patent/WO2007128359A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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

Definitions

  • the invention relates to a method for producing a rotationally symmetrical transmission component having at least one toothing on an inner and / or an outer diameter according to the preamble of patent claim 1 and a transmission component according to the preamble of patent claim 8.
  • Rotationally symmetrical transmission components are used in particular in automotive technology for power transmission and are often provided with integrally formed teeth, which may be formed as internal or external teeth.
  • teeth are, in addition to the well-known cutting process, for example, as in the generic DE 43 15 503 Al made by cold forming, in particular impact rolls.
  • the teeth in this way can no longer be produced in high quality or with a sufficiently high number of teeth.
  • the invention has for its object to propose a method with which teeth with many teeth in high quality can be formed even with relatively thick transmission components. Furthermore, such a manufactured transmission component to be proposed.
  • components can be produced with a very high component and gearing quality. Furthermore, a large number of teeth can be generated in this way, whereby the toothing can be used for example for a very sensitive sensing of the speed of the component.
  • Another advantage is that the applicability of the method to thick components a greater length for a possible axial displacement of the component can be generated. Furthermore, gears with high coverage can be generated, via which a high torque can be transmitted.
  • the cold-rolled toothing and its high hardness caused by cold work hardening of the Material achieved a lower gear wear and a longer life of the components.
  • an internal toothing and an external toothing is provided at the same time.
  • the method can be optimally used, because it can be generated two teeth in one step. (Claim 2).
  • the sheet thickness is reduced by a flow-forming process between the preforming of the federal government of the sheet metal blank and cold rolling.
  • the material is better distributed over the width of the sheet metal blank (claim 3).
  • the pressure-rolling and the cold-rolling of the toothing are carried out in combination on a cold-rolling machine.
  • the number of manufacturing steps used can be reduced and the manufacturing costs can be reduced (claim 4).
  • the fine blanking and preforming of the collar of the sheet metal blank can be carried out in a step tool on a fine blanking press. This also serves to reduce the method steps and simplify the method (claim 5).
  • a rotationally symmetrical transmission component which is produced by the method according to the invention, and a continuously variable transmission (CVT) proposed with at least one such component.
  • CVT continuously variable transmission
  • Fig. 1 a sheet metal blank after the fineblanking process
  • Fig. 3 shows the finished transmission component after carrying out the method
  • Fig. 4 shows another embodiment of a transmission component as well
  • Fig. 5 is a detailed view of the transmission component of FIG. 4.
  • FIGS. 1 to 3 show a method for producing a first embodiment of a rotationally symmetrical transmission component 1 from a sheet metal blank 11 on the basis of the various intermediate stages of the component 1 according to the individual method steps.
  • this transmission component 1 is in this embodiment, a drive plate 21, as used in a transmission.
  • a drive plate 21 which has after the implementation of the method in the finished state, which is shown in Fig. 3, on its inner diameter 7 an internal toothing 3, which is also referred to as driving toothing 23.
  • This toothing 23 meshes with a corresponding counter-toothing, for example on a variator disc of a CVT transmission.
  • the driving teeth 23 is in this embodiment in the form of a lamellar toothing, as used for example in automatic transmissions frequently executed.
  • CVT transmissions are continuously variable transmissions for motor vehicles. It can be designed both as a belt-CVT transmission and as a CVT-Wälzgetriebe (Toroid), as described in detail for example in DE 102 06 202 Al. In contrast to previous CVT transmissions can be transmitted with the drive plate on the one hand higher torques and on the other hand better support higher loads in the axial direction can be realized.
  • the drive plate 21 has a second toothing 5, which serves to sense the rotational speed of the drive plate 21, on its outer diameter 9.
  • the starting point of the method is a sheet metal blank 11, shown in FIG. 1, which is relatively thick-walled in this case, ie has a sheet thickness 17 of more than 10 mm in the axial direction.
  • the sheet metal blank 11 in this case has an inner bore 12.
  • the sheet metal blank 11 is finely stamped or finely cut on a fine blanking press. In this way, precise cut edges are produced with a high level of smooth cut.
  • the sheet metal blank 11 is brought into the preform 25 shown in FIG.
  • the outer edge 13 is preformed or enforced to a kind of paragraph 26, so that this Paragraph 26 protrudes in the axial direction 29 over the cross-sectional area 27 of the sheet metal blank 11.
  • the aim of this process step in addition to the creation of the paragraph 26, a better material distribution over the cross section of the circular sheet metal sheet 11.
  • the paragraph 26 is a precursor of a federal 15, which will be completed in the next step. This is followed by an optional intermediate step, the pressure-rolling of the teeth 3 and 5.
  • the wall of the paragraph is press-rolled in the radial direction with pressure rollers against a profiled tool.
  • This intermediate step serves to reduce the initial wall thickness and thus to prepare for the following gear production and is only required for complicated gear geometries.
  • the pressure-rolling can also be dispensed with or replaced by a machining process.
  • the cold rolling which is also referred to as impact rolls or as coarse rolls, is effected by a puncture in the component 1 in the axial direction 29.
  • the cold rolling machine has a rotatable workpiece holder with a profiled mandrel and a rotatable in a rolling head carrier rolling head, in the a rotatable impact roller is mounted with which a partial rolling operation is performed on the transmission member 1, which is arranged coaxially to the mandrel at each rolling head revolution.
  • the transmission component 1 is an axially movable variator disk 31, shown by way of example in FIG. 4, as used in a continuously variable transmission.
  • a driving toothing 23 in the form of a lamellar toothing on the outer diameter 9 is provided.
  • a further additional method step is finally carried out on the outer toothing 5.
  • the outer teeth 5, as shown in Fig. 5 in a detailed view still punched in the radial direction window 19 between the tooth gaps 27 of the toothing 5, through the combination of windows 19 and 5 toothing, for example, required for speed sensing higher resolution to reach over the circumference of the transmission component 1.
  • the respective intermediate steps are optional and depend on the sheet thickness and the quality of the component to be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)
  • Friction Gearing (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un élément de transmission (1) à symétrie de révolution comportant au moins une denture (3, 5) au niveau d'un diamètre intérieur (7) et/ou d'un diamètre extérieur (9) à partir d'une tôle. Afin de pouvoir produire une denture de très grande qualité même dans le cas d'éléments relativement épais dans la direction axiale, le procédé englobe selon l'invention les étapes de procédé suivantes : découpage précis de la tôle, préformage d'un collet (15) au niveau du bord extérieur de la tôle ainsi que fabrication d'au moins une denture (3, 5) par un procédé de laminage à froid avec finition du collet (15). De plus, on propose un élément de transmission fabriqué de telle manière.
PCT/EP2007/001436 2006-05-05 2007-02-20 Procédé de fabrication d'un élément de transmission Ceased WO2007128359A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610020902 DE102006020902A1 (de) 2006-05-05 2006-05-05 Verfahren zur Herstellung eines Getriebebauteils
DE102006020902.8 2006-05-05

Publications (1)

Publication Number Publication Date
WO2007128359A1 true WO2007128359A1 (fr) 2007-11-15

Family

ID=37951655

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/001436 Ceased WO2007128359A1 (fr) 2006-05-05 2007-02-20 Procédé de fabrication d'un élément de transmission

Country Status (2)

Country Link
DE (1) DE102006020902A1 (fr)
WO (1) WO2007128359A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012100278A1 (de) * 2012-01-13 2013-07-18 Winkelmann MSR Technology GmbH & Co. KG Rotationssymmetrisches Bauteil
DE102013225382A1 (de) * 2013-12-10 2015-06-11 Schaeffler Technologies AG & Co. KG Kupplungszwischendruckplatte
DE102014007270A1 (de) * 2014-05-17 2015-11-19 Borgwarner Inc. Lamelle mit einem segmentierten Grundkörper und Verfahren zur Herstellung einer Lamelle oder eines segmentierten Grundkörpers für eine Lamelle
DE102015009733B4 (de) 2015-07-31 2024-11-28 Transform Automotive LLC, Inc. Verfahren zum Rollen von Lamellenträgern oder dergleichen und ein hierzu verwendeter Profilrollensatz

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3932823C1 (en) * 1989-09-30 1990-12-06 Wf-Maschinenbau Und Blechformtechnik Gmbh & Co Kg, 4415 Sendenhorst, De Toothed transmission component mfr. - involves tool with external teeth forming inside teeth on workpiece
DD293752A5 (de) * 1990-04-17 1991-09-12 Veb Automobilwerk Eisenach,De Erweiterter gesamtschneidmechanismus fuer feinschneidwerkzeuge
DE4315503A1 (de) * 1992-07-16 1994-01-20 Ernst Grob Ag Maennedorf Verfahren zum Herstellen eines hohlen Werkstücks, das wenigstens innen gerade oder schräg zur Werkstückachse profiliert ist
DE19605645A1 (de) * 1996-02-15 1996-08-14 Leifeld Gmbh & Co Verfahren zur Herstellung eines Maschinenelementes mit Außenverzahnung
DE19635152A1 (de) * 1996-08-14 1998-03-12 Wf Maschinenbau Blechformtech Verfahren und Vorrichtung zur Herstellung eines außen verzahnten Getriebeteiles
US5774986A (en) * 1995-09-22 1998-07-07 Nissan Motor Co., Ltd. Method and apparatus for cold-forming of toothed wheels from sheet metal
DE19916037C1 (de) * 1999-04-09 2000-09-14 Daimler Chrysler Ag Verfahren zur Herstellung von leistungsführenden Getriebeteilen
WO2006002964A1 (fr) * 2004-07-06 2006-01-12 Feintool International Management Ag Procede et dispositif pour realiser des pieces estampees

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3932823C1 (en) * 1989-09-30 1990-12-06 Wf-Maschinenbau Und Blechformtechnik Gmbh & Co Kg, 4415 Sendenhorst, De Toothed transmission component mfr. - involves tool with external teeth forming inside teeth on workpiece
DD293752A5 (de) * 1990-04-17 1991-09-12 Veb Automobilwerk Eisenach,De Erweiterter gesamtschneidmechanismus fuer feinschneidwerkzeuge
DE4315503A1 (de) * 1992-07-16 1994-01-20 Ernst Grob Ag Maennedorf Verfahren zum Herstellen eines hohlen Werkstücks, das wenigstens innen gerade oder schräg zur Werkstückachse profiliert ist
US5774986A (en) * 1995-09-22 1998-07-07 Nissan Motor Co., Ltd. Method and apparatus for cold-forming of toothed wheels from sheet metal
DE19605645A1 (de) * 1996-02-15 1996-08-14 Leifeld Gmbh & Co Verfahren zur Herstellung eines Maschinenelementes mit Außenverzahnung
DE19635152A1 (de) * 1996-08-14 1998-03-12 Wf Maschinenbau Blechformtech Verfahren und Vorrichtung zur Herstellung eines außen verzahnten Getriebeteiles
DE19916037C1 (de) * 1999-04-09 2000-09-14 Daimler Chrysler Ag Verfahren zur Herstellung von leistungsführenden Getriebeteilen
WO2006002964A1 (fr) * 2004-07-06 2006-01-12 Feintool International Management Ag Procede et dispositif pour realiser des pieces estampees

Also Published As

Publication number Publication date
DE102006020902A1 (de) 2007-11-08

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