WO2008055275A1 - Procédé de fabrication d'une roue dentée à partir de métal pulvérisé - Google Patents

Procédé de fabrication d'une roue dentée à partir de métal pulvérisé Download PDF

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Publication number
WO2008055275A1
WO2008055275A1 PCT/AT2007/000456 AT2007000456W WO2008055275A1 WO 2008055275 A1 WO2008055275 A1 WO 2008055275A1 AT 2007000456 W AT2007000456 W AT 2007000456W WO 2008055275 A1 WO2008055275 A1 WO 2008055275A1
Authority
WO
WIPO (PCT)
Prior art keywords
teeth
blank
powder
sintered
tooth flanks
Prior art date
Application number
PCT/AT2007/000456
Other languages
German (de)
English (en)
Inventor
Herbert Schmid
Karl Dickinger
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 WO2008055275A1 publication Critical patent/WO2008055275A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/16—Both compacting and sintering in successive or repeated steps
    • B22F3/164—Partial deformation or calibration
    • B22F3/168—Local deformation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/08—Profiling
    • F16H55/0873—Profiling for improving axial engagement, e.g. a chamfer at the end of the tooth flank

Definitions

  • the invention relates to a method for the powder metallurgical production of a toothed wheel having straight flank lines, wherein a molding is pressed from a sintered powder and sintered into a blank.
  • Powder metallurgically produced gears for gear transmission, but also for chain transmission have a comparatively sharp transition between the tooth flanks and the front sides of the teeth, which can lead to an overload in the edge region especially for teeth with straight flank lines, if z. B. the flanks of the meshing teeth are not parallel.
  • To avoid such overloads aszipige teeth or gears with Endrücksure (WO 00/20780 A1) are used, but cause both the Boothnbalmaschine the teeth and the final withdrawal of the flank lines a complex processing of the tooth flanks.
  • the invention is therefore based on the object, a method for powder metallurgy producing a gear of the type described in such a way that the risk of overloading of the teeth in the edge region between rule the tooth flanks and the front sides of the teeth can be avoided without having to provide a aziballige gearing or a gearing with Endschreiblander.
  • the invention solves this problem by the fact that the blank is rounded and compacted after sintering along its resulting between the tooth flanks and the front sides of the teeth edges by pressing.
  • edges between the tooth flanks and the front sides of the teeth are processed by pressing after sintering of the blank, results in the rounding of the edges and a compression of the sintered material in the edge region, which has an advantageous effect on the load capacity of the teeth.
  • the rounding of the edges between the tooth flanks and the front sides of the teeth improves the geometrical requirements for load bearing and at the same time increases the strength properties of the sintered material by compacting, so that overall loading conditions can be ensured which prevent the use of teeth with a straight flank line without end retraction or allow width ballasting.
  • the achievable by sintering manufacturing tolerances are not sufficient, so that the tooth flanks must be machined by machining.
  • the rounding against the tooth flanks of the blank can be made to jump back by a measure that corresponds to a provided in the flank area allowance for subsequent machining flank processing of the teeth. Accordingly, if the flank area is subjected to a post-processing after the rounding has been pressed and removed by removing the allowance, a grinding cut results between the tooth flanks and the precautionary setback rounding, so that a sharp-edged transition between the working edges is achieved. teten tooth flanks and the embossed before this processing rounding is avoided.
  • FIG. 3 the clamped in a pusher tool gear in a schematic axial section
  • FIG. 4 shows a tooth of the blank pressed according to the invention in the region of an edge between the tooth flanks and an end face of the teeth in a section on a larger scale.
  • the gear 1 to be produced has, according to FIGS. 1 and 2, teeth 2 with flanks 3 which form straight flank lines, as can be seen in FIG. 2.
  • the gear 1 is powder metallurgically produced in a conventional manner, wherein a molding of a sintered powder is pressed and sintered into a blank.
  • This sintered blank forms a pronounced in particular in the region of the pitch of the tool for the pressing of the blank sharp transition between the tooth flanks 3 and the end faces 4 of the teeth 2.
  • the original square edges 5 of the blank are therefore provided with a rounding 6, as in Fig. 4 is illustrated.
  • the sintered blank of the gear 1 is clamped between two parts 7, 8 of a pusher tool 9, which rounded according to its shape, the edges 5 of the blank in an axial loading.
  • the edges 5 are not only pressed around, but also experience a compaction by a flow of the sintered material in the spinning area.
  • the compressed edge region 10 is characterized by a narrower hatching - A -

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)

Abstract

La présente invention concerne un procédé de fabrication, à partir de métal pulvérisé, d'une roue dentée (1) dotée de dents (2) présentant des lignes de flanc droites, une pièce brute étant compactée à partir d'une poudre de frittage et frittée en une ébauche. L'invention vise à fournir des conditions d'engrènement avantageuses. A cet effet, l'ébauche est arrondie et comprimée par pression après le frittage le long de ses arêtes (5) séparant les flancs (3) des dents et les faces frontales (4) des dents (2).
PCT/AT2007/000456 2006-11-06 2007-09-28 Procédé de fabrication d'une roue dentée à partir de métal pulvérisé WO2008055275A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1845/2006 2006-11-06
AT18452006A AT503645B1 (de) 2006-11-06 2006-11-06 Verfahren zum pulvermetallurgischen herstellen eines zahnrades

Publications (1)

Publication Number Publication Date
WO2008055275A1 true WO2008055275A1 (fr) 2008-05-15

Family

ID=38777824

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2007/000456 WO2008055275A1 (fr) 2006-11-06 2007-09-28 Procédé de fabrication d'une roue dentée à partir de métal pulvérisé

Country Status (2)

Country Link
AT (1) AT503645B1 (fr)
WO (1) WO2008055275A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9291248B2 (en) 2009-05-20 2016-03-22 Miba Sinter Austria Gmbh Gear wheel
EP3208023A1 (fr) * 2016-02-04 2017-08-23 Sikorsky Aircraft Corporation Bord de dent d'engrenage convexe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114472891B (zh) * 2022-01-10 2023-11-24 江苏精研科技股份有限公司 一种高精密小模数齿轮高效成形方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000020780A1 (fr) * 1998-10-06 2000-04-13 Miba Sintermetall Aktiengesellschaft Engrenage comportant une denture fabriquee notamment par metallurgie des poudres

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT405256B (de) * 1995-02-16 1999-06-25 Miba Sintermetall Ag Verfahren zum herstellen einer schiebemuffe für die synchronisiereinrichtung eines zahnradwechselgetriebes
CH690565A5 (de) * 1995-04-10 2000-10-31 Feinstanz Ag Verfahren zur Herstellung von Getriebebauteilen mit Zähnen mit Dachform und Hinterschnitt.
DE19809039B4 (de) * 1998-03-04 2007-08-16 PMG Füssen GmbH Verfahren zur Herstellung einer metallischen Schiebemuffe mit Innenverzahnung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000020780A1 (fr) * 1998-10-06 2000-04-13 Miba Sintermetall Aktiengesellschaft Engrenage comportant une denture fabriquee notamment par metallurgie des poudres

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9291248B2 (en) 2009-05-20 2016-03-22 Miba Sinter Austria Gmbh Gear wheel
EP3208023A1 (fr) * 2016-02-04 2017-08-23 Sikorsky Aircraft Corporation Bord de dent d'engrenage convexe
US10295039B2 (en) 2016-02-04 2019-05-21 Sikorsky Aircraft Corporation Convex gear tooth edge break

Also Published As

Publication number Publication date
AT503645B1 (de) 2007-12-15
AT503645A4 (de) 2007-12-15

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