EP1622733A2 - Procede de production d'une piece annulaire en forme de cuvette presentant une denture interieure, preforme en forme de cuvette et piece annulaire en forme de cuvette - Google Patents

Procede de production d'une piece annulaire en forme de cuvette presentant une denture interieure, preforme en forme de cuvette et piece annulaire en forme de cuvette

Info

Publication number
EP1622733A2
EP1622733A2 EP04759597A EP04759597A EP1622733A2 EP 1622733 A2 EP1622733 A2 EP 1622733A2 EP 04759597 A EP04759597 A EP 04759597A EP 04759597 A EP04759597 A EP 04759597A EP 1622733 A2 EP1622733 A2 EP 1622733A2
Authority
EP
European Patent Office
Prior art keywords
preform
ring
cup
ring element
shaped
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Withdrawn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
EP04759597A
Other languages
German (de)
English (en)
Inventor
Manfred Vogel
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.)
Neumayer Tekfor GmbH
Original Assignee
Neumayer Tekfor GmbH
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 Neumayer Tekfor GmbH filed Critical Neumayer Tekfor GmbH
Publication of EP1622733A2 publication Critical patent/EP1622733A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/30—Making machine elements wheels; discs with gear-teeth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49995—Shaping one-piece blank by removing material

Definitions

  • the present invention relates to a method for producing a cup-shaped ring part with internal teeth.
  • Cup-shaped ring parts of this type with internal toothing are usually produced by producing the teeth of the internal toothing on the inner wall of a ring element by impacting or another machining operation. If such ring parts, which are used, for example, in automatic transmissions, such as, for example, as ring gears for planetary gears, are to have a mechanical connection to their longitudinal center axis, they are usually connected to a separately produced hub part, so that an overall cup-shaped ring part is produced. The connection to the hub part takes place, for example, by plugging or screwing.
  • the counter holder In a reshaping operation, the counter holder is pressed against the bottom of the preform and the annular pressure stamp against the end face of the cylindrical edge of the preform. To prevent the preform from escaping or flowing radially outward, the preform is surrounded by a drawing ring which exerts a counterpressure in the radial direction.
  • the object of the present invention is to provide a method for producing an inexpensive, cup-shaped ring part, which consists in one part of a ring element having an internal toothing and a hub part, by which it is possible that the internal toothing of the ring element comparatively without a large run-out area up to Level of the bottom surface of the hub part can extend, so that, for example, later use with an automatic transmission spur gears, in particular planetary gears, practically to the level of this bottom before enough and can also comb in this area with the internal toothing of the ring element.
  • the invention solves this problem and is characterized in that at least some of the following features are realized.
  • a cup-shaped preform with a ring element and a hub part is arranged in a die part.
  • a stamp part which has on its outer wall an external toothing corresponding to the internal toothing to be produced in the ring element, is introduced into the interior of the preform.
  • annular groove is provided in the bottom surface of the hub part.
  • the main advantage of the present invention is that the teeth of the internal toothing of the ring element of the cup-shaped ring part can extend practically to the level of the bottom surface of the hub part, so that spur gears, for example planetary gears, mesh with the internal toothing up to the area of the level of the bottom surface of the hub part can.
  • spur gears for example planetary gears
  • the individual teeth of the ring parts produced according to the present method are extremely sharp-edged and contour-accurate, particularly in the area of the bottom surface of the hub part.
  • a preform is used in which an indentation or groove is arranged in the corner region between the bottom surface of the hub part and the inner surface of the annular wall of the ring element.
  • the groove is introduced into the preform in such a way that its radially outer side surface represents an extension of the inner surface of the ring element of the preform.
  • An external toothing can be produced in a particularly simple and advantageous manner on the outside of the ring part in the same shaping step in that the die part has an internal toothing corresponding to the external toothing on its inner surface.
  • a die part can be used which has a central recess for receiving the axle pin.
  • a preform can be used which has a central bore in the hub part.
  • a drawing ring can be used which surrounds the region of the ring element of the preform which projects beyond the die part, in order to exert a radial counterpressure during the shaping.
  • the drawing ring can be formed in one piece with the die part.
  • the cup-shaped preform for carrying out the method according to the invention has an annular groove in the end region between the ring element and the bottom surface of the hub part, wherein the radially outer side surface of the groove can represent an extension of the inner surface of the ring element for precise tooth formation.
  • Figure 1 is a schematic representation of an apparatus for performing the method according to the invention for producing an existing ring part
  • FIG. 2 shows a ring part produced according to a preferred embodiment of the method according to the invention.
  • the stamp part 4 On its outer wall, the stamp part 4 has one of the internal teeth to be produced in the ring element 3 6 corresponding external teeth 7.
  • the die part 1 can be formed in one or two parts, so that it can accommodate the cup-shaped preform 2.
  • a schematically illustrated drawing ring 20, known per se is provided, which pulls the region of the ring element 3 of the preform projecting beyond the die part 1 2 surrounds and exerts a radial counter pressure when forming.
  • This drawing ring 20 can also be formed in one piece with the die part 1.
  • a preform 2 is first inserted into the interior of the die part 1. Then the stamp part 4 with its external toothing 7 is introduced into the interior of the preform 2. Then the die part 1 and / or the annular pressure stamp 5, which on the end face of the the open end of the preform 2 abuts, for example hydraulically, moved relative to one another, so that the preform 2 is formed into the ring part 2 '(FIG. 2) to be produced, the external toothing 7 of the stamp part 4 being an internal toothing 6 in the inner wall of the ring element 3' of the ring part 2 '' has sharp edges. For this it is essential that the external toothing 7 of the stamp part 4 extends up to the end face 14 of the stamp part 4.
  • FIG. 2 shows the ring part 2 ′ produced in this way from the preform 2.
  • the internal toothing 6 reaches the aforementioned bottom surface 13 'of the ring part 3' exactly and in a form-accurate manner.
  • the toothings 6, 7 can be the illustrated axially running toothings or else helical toothings.
  • the preform 2 has an annular indentation or groove 9 in the corner region between the inner surface 12 of the annular wall of the ring element 3 and the bottom surface 13 of the hub part 11, by means of which it is achieved that when the preform 2 is formed into the ring part 2 'the internal toothing 6 produced in the ring element 3' can extend to the level of the bottom surface 13 'of the hub part 11' because the displaced or flowing material of the preform 2 can flow into the area of the groove 9 via the stamp part 4. It is essential here that the radially outer side surface 9 'of the groove 9 represents the most exact possible extension of the inner surface 12 of the ring element 3 of the preform 2.
  • FIG. 4 shows a further preform 2 and a die part 1 for producing a cup-shaped ring part 2 'with an integrally formed axle pin 16.
  • the die part 1 in this case has a central recess. tion 18, which is preferably complementary to the shape of the journal 16 and can accommodate this during forming.
  • FIG. 5 shows a further embodiment of the invention, in which the preform 2 (and therefore also the ring part 2 ′ produced therefrom) has a central bore 17 in the hub part 11.
  • FIG. 6 shows an embodiment of the invention in which, in one and the same shaping step, in addition to the internal toothing 6, an external toothing is simultaneously formed on the outside of the ring element 3.
  • the die part 1 has a corresponding internal toothing 19 on its inner surface.
  • the external toothing can have the shape of a straight or helical toothing as well as a spline and running toothing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de production d'une pièce annulaire en forme de cuvette (2').
EP04759597A 2003-04-22 2004-04-22 Procede de production d'une piece annulaire en forme de cuvette presentant une denture interieure, preforme en forme de cuvette et piece annulaire en forme de cuvette Withdrawn EP1622733A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10318178 2003-04-22
PCT/DE2004/000840 WO2004094083A2 (fr) 2003-04-22 2004-04-22 Procede de production d'une piece annulaire en forme de cuvette presentant une denture interieure

Publications (1)

Publication Number Publication Date
EP1622733A2 true EP1622733A2 (fr) 2006-02-08

Family

ID=33304872

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04759597A Withdrawn EP1622733A2 (fr) 2003-04-22 2004-04-22 Procede de production d'une piece annulaire en forme de cuvette presentant une denture interieure, preforme en forme de cuvette et piece annulaire en forme de cuvette

Country Status (5)

Country Link
US (1) US20070039163A1 (fr)
EP (1) EP1622733A2 (fr)
JP (1) JP2006524135A (fr)
DE (1) DE102004019673A1 (fr)
WO (1) WO2004094083A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004039967B4 (de) 2004-08-18 2006-10-12 Gkn Driveline International Gmbh Verfahren zum Rückwärtsfließpressen von Innenprofilen
DE102005061354A1 (de) * 2005-12-21 2007-06-28 Continental Teves Ag & Co. Ohg Kolben für eine hydraulische Bremse und Verfahren zur Herstellung
EP1894646B1 (fr) 2006-09-01 2012-10-17 Feintool Intellectual Property AG Procédé et dispositif de fabrication d'une denture sur un corps tridimensionnel déformé et estampé de haute précision
ATE505278T1 (de) † 2009-01-19 2011-04-15 Finova Feinschneidtechnik Gmbh Verfahren und vorrichtung zum feinschneiden von werkstücken
DE102009019249B4 (de) * 2009-04-30 2011-03-31 Felss Gmbh Verfahren zur Herstellung eines Profils in einer Wand eines Werkstücks
US8997354B2 (en) 2011-03-24 2015-04-07 Aisin Aw Co., Ltd. Manufacturing method for toothed member, manufacturing device for toothed member, and toothed member

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3639739C2 (de) * 1986-11-21 1993-11-18 Honda Motor Co Ltd Verfahren, Ausgangsmaterial und Vorrichtung zum Herstellen eines eine Innenverzahnung aufweisenden topfförmigen Erzeugnisses
JPH01317653A (ja) * 1988-06-15 1989-12-22 Honda Motor Co Ltd 内歯付きカップ状製品の成形方法
JPH0785823B2 (ja) * 1991-03-29 1995-09-20 山川工業株式会社 歯形成形品及び歯形成形方法
EP0955110B1 (fr) * 1998-05-07 2004-04-07 Leico GmbH & Co. Werkzeugmaschinenbau Procédé et dispositif pour le fluotournage
DE10021189A1 (de) * 1999-05-04 2001-01-25 Stefan Hauk Verfahren und Vorrichtung zur Herstellung von Bauteilen mit Verzahnungen, insbesondere innenverzahnten Hohlrädern
DE10054399A1 (de) * 2000-11-02 2002-06-27 Forschungsges Umformtechnik Verfahren und Vorrichtung zur Herstellung eines Werkstückes mit Innenverzahnung, insbesondere eines Hohlrades

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004094083A2 *

Also Published As

Publication number Publication date
WO2004094083A2 (fr) 2004-11-04
US20070039163A1 (en) 2007-02-22
JP2006524135A (ja) 2006-10-26
DE102004019673A1 (de) 2004-11-18
WO2004094083A3 (fr) 2005-01-20

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