EP1694452B1 - Procede de fabrication d'une roue dentee - Google Patents

Procede de fabrication d'une roue dentee Download PDF

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Publication number
EP1694452B1
EP1694452B1 EP04802001A EP04802001A EP1694452B1 EP 1694452 B1 EP1694452 B1 EP 1694452B1 EP 04802001 A EP04802001 A EP 04802001A EP 04802001 A EP04802001 A EP 04802001A EP 1694452 B1 EP1694452 B1 EP 1694452B1
Authority
EP
European Patent Office
Prior art keywords
powder metal
metal blank
toothing
pressure rings
circumference
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.)
Active
Application number
EP04802001A
Other languages
German (de)
English (en)
Other versions
EP1694452A1 (fr
Inventor
Christian Sandner
Horst Rössler
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.)
Miba Sinter Austria GmbH
Original Assignee
Miba Sinter Austria 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 Miba Sinter Austria GmbH filed Critical Miba Sinter Austria GmbH
Publication of EP1694452A1 publication Critical patent/EP1694452A1/fr
Application granted granted Critical
Publication of EP1694452B1 publication Critical patent/EP1694452B1/fr
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Anticipated expiration legal-status Critical

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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
    • B21H5/022—Finishing gear teeth with cylindrical outline, e.g. burnishing
    • 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
    • Y10T29/49462—Gear making
    • Y10T29/49467—Gear shaping
    • Y10T29/49471—Roll forming

Definitions

  • the invention relates to a method for producing a gear from a powder metal blank pressed and sintered with an oversize in the toothed region, the powder metal blank supported on a mandrel being in the region of the oversize by pressing on a counter-toothing of a rotating pusher tool engaging in the teeth of the powder metal blank plastic deformation is compressed by the allowance.
  • Such a method is from the AT 406 836 B known.
  • the invention is therefore based on the object, a method for producing a gear of the type described in such a way that an advantageous compression of the powder metal blank produced with an oversize can be ensured in the toothed area without having to fear an increase in the wheel circumference.
  • the invention solves this problem by the fact that the powder metal blank is radially clamped during its compression at both ends over the circumference.
  • the powder metal blank Due to the clamping of the powder metal blank on both end faces, the otherwise limited to the engagement region of the printer tool locally pressing forces are distributed over the circumference of the powder metal blank with the effect that an increase in the wheel circumference is suppressed and the compression of the powder metal blank substantially to the Aufwin Scheme the Gearing limited.
  • the powder metal blank can be clamped axially in a simple manner between two pressure rings, wherein both force and positive connections are possible. It is only ever about to clamp the powder metal blank radially, without hindering the compaction by the pusher tool in the toothed area.
  • a known device which has a mandrel for supporting the oversized pressed and sintered powder metal blank of the gear to be produced and at least one pusher tool which engages with a counter-toothing in the toothing of the powder metal blank. If in such a device two coaxial to the mandrel, the powder metal blank between axially clamped pressure rings provided so the powder metal blank between these axially pressed pressure rings can be clamped radially over the circumference, due to the consequent inclusion of a portion of the engaging portion of the pusher tool on the Pulvermetallrohling between the pusher tool and the mandrel acting forces to prevent enlargement of the wheel circumference, without hindering the compression in the toothed area.
  • one of the two pressure rings can be axially supported against the mandrel, while the other pressure ring is connected to an axial actuator.
  • the required axial clamping forces can be exerted by the pressure rings on the powder metal blank on this actuator.
  • the pressure rings and / or the powder metal blank may have axially projecting circumferential projections for the positive connection between the powder metal blank and the pressure rings.
  • These circumferential lugs can engage in annular recesses or axial overlap corresponding shoulders to ensure a positive engagement in the radial direction.
  • the provided in the field of powder metal blank lugs or recesses can be removed after compression of the gearing area.
  • the device according to the Fig. 1 has a mandrel 1 for receiving a powder metal blank 2 to be processed, and a pressure roller 5 which can be set against a pusher tool 4 via an adjusting drive 3, for example a hydraulic cylinder.
  • the pusher tool 4 consists of a sprocket with an internal toothing 6, which cooperates as a counter-toothing with the toothing 7 of the powder metal blank 2.
  • the teeth of the powder metal blank 2 were sintered with a corresponding allowance in the flank or foot area, but the teeth of the internal teeth 6 of the pusher tool 4 are formed according to the nominal size of the teeth of the gear to be produced, the tooth flanks or feet in the Oversize compressed by the pressed teeth of the pusher tool 4 under a plastic deformation, wherein the compression takes place gradually, because the powder metal blank is processed in several rounds.
  • the powder metal blank 2 is radially clamped at its two end faces over the circumference, which precludes an extension of the wheel circumference.
  • the otherwise locally limited to the meshing area pressing forces can thus be removed distributed over the entire circumference of the wheel.
  • the distributed over the circumference forces exclude an overload of the wheel body. Nevertheless, the necessary compression of the toothing is ensured in the range of the oversize, because yes, the toothing is outside the clamped area of the powder metal blank.
  • two pressure rings 8, 9 are provided, between which the powder metal blank 2 is clamped axially.
  • an actuator 10 which is formed in the embodiment as a nut 11 which is mounted on the mandrel 1 in the axial direction schraubver plausible and presses the pressure ring 9 against the powder metal blank 2, which is supported on the pressure ring 8.
  • the pressure ring 8 itself abuts against a shoulder 12 of the mandrel 1 and is axially fixed by this shoulder 12.
  • the positive connection between the powder metal blank 2 on the one hand and the pressure rings 8, 9 on the other hand complemented by a positive connection.
  • the powder metal blank 2 forms axially projecting lugs 13, which result from the pressure rings 8, 9 overlapped ring shoulders, so that on these annular shoulders a form-fitting Support of the powder metal blank 2 at the pressure rings 8, 9 sets.
  • the radial clamping of the powder metal blank 2 can also be done only positively when the connection between the Pu Ivermetallrohling 2 and the pressure rings 8, 9 via circumferential radial projections 13 of the pressure rings 8, 9, which press into the end faces of the powder metal blank 2 and thus condition the desired positive engagement in the radial direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Gears, Cams (AREA)

Claims (2)

  1. Procédé de fabrication d'une roue dentée à partir d'une ébauche en poudre métallique (2), pressée et frittée, avec une surépaisseur dans la zone de denture, l'ébauche en poudre métallique (2), soutenue sur un mandrin (1), étant comprimée, de la valeur de la surépaisseur, ceci étant accompagné d'une déformation plastique, dans la zone de la surépaisseur, par le biais d'un pressage d'une contre-denture, s'engrenant dans la denture (7) de l'ébauche en poudre métallique (2), d'un outil presseur (4) circulaire, caractérisé en ce que l'ébauche en poudre métallique (2) est bloquée radialement sur la périphérie, sur deux faces frontales, pendant sa compression.
  2. Procédé selon la revendication 1, caractérisé en ce que l'ébauche en poudre métallique (2) est enserrée axialement entre deux anneaux de pressage (8, 9), pour assurer un blocage radial.
EP04802001A 2003-12-19 2004-12-13 Procede de fabrication d'une roue dentee Active EP1694452B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0205403A AT412955B (de) 2003-12-19 2003-12-19 Verfahren zum herstellen eines zahnrades
PCT/AT2004/000436 WO2005058524A1 (fr) 2003-12-19 2004-12-13 Procede de fabrication d'une roue dentee

Publications (2)

Publication Number Publication Date
EP1694452A1 EP1694452A1 (fr) 2006-08-30
EP1694452B1 true EP1694452B1 (fr) 2010-09-01

Family

ID=34140250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04802001A Active EP1694452B1 (fr) 2003-12-19 2004-12-13 Procede de fabrication d'une roue dentee

Country Status (7)

Country Link
US (1) US7334444B2 (fr)
EP (1) EP1694452B1 (fr)
JP (1) JP2007518567A (fr)
AT (1) AT412955B (fr)
DE (1) DE502004011620D1 (fr)
ES (1) ES2351504T3 (fr)
WO (1) WO2005058524A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014002219A1 (de) 2014-02-21 2015-08-27 Gkn Sinter Metals Engineering Gmbh Verfahren und Vorrichtung zur Herstellung eines Zahnrades nebst Spannmittel

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT503037B1 (de) * 2006-05-04 2007-07-15 Miba Sinter Austria Gmbh Verfahren zum herstellen eines zahnrades
JP5597159B2 (ja) 2011-04-12 2014-10-01 住友重機械工業株式会社 歯車構造体の製造方法及び歯車構造体の中間構造体
JP7127296B2 (ja) 2018-02-23 2022-08-30 トヨタ自動車株式会社 ギヤの製造方法及び製造装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59115120A (ja) 1982-12-22 1984-07-03 Komatsu Zoki Kk ギヤのバニシング加工法
JPH0749132B2 (ja) 1985-09-04 1995-05-31 アイシン精機株式会社 歯車転造装置
GB2250227B (en) * 1990-10-08 1994-06-08 Formflo Ltd Gear wheels rolled from powder metal blanks
US5659955A (en) * 1994-01-21 1997-08-26 Plamper; Gerhard Method of making powder metal helical gears
JP3298765B2 (ja) * 1995-09-06 2002-07-08 トヨタ自動車株式会社 高精度歯車転造方法
AT406836B (de) 1997-10-30 2000-09-25 Miba Sintermetall Ag Verfahren und vorrichtung zum herstellen eines zahnrades

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014002219A1 (de) 2014-02-21 2015-08-27 Gkn Sinter Metals Engineering Gmbh Verfahren und Vorrichtung zur Herstellung eines Zahnrades nebst Spannmittel
DE102014002219B4 (de) * 2014-02-21 2015-12-10 Gkn Sinter Metals Engineering Gmbh Verfahren und Vorrichtung zur Herstellung eines Zahnrades nebst Spannmittel
CN106163694A (zh) * 2014-02-21 2016-11-23 吉凯恩粉末冶金工程有限公司 用于制造齿轮的方法和装置连同夹紧机构
CN106163694B (zh) * 2014-02-21 2018-03-13 吉凯恩粉末冶金工程有限公司 用于制造齿轮的方法和装置连同夹紧机构

Also Published As

Publication number Publication date
US20070107481A1 (en) 2007-05-17
ES2351504T3 (es) 2011-02-07
ATA20542003A (de) 2005-02-15
DE502004011620D1 (de) 2010-10-14
EP1694452A1 (fr) 2006-08-30
US7334444B2 (en) 2008-02-26
JP2007518567A (ja) 2007-07-12
AT412955B (de) 2005-09-26
WO2005058524A1 (fr) 2005-06-30

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