EP2083956B1 - Verfahren zur herstellung eines einstückigen, metallischen mehrfachrades und mehrfachrad - Google Patents

Verfahren zur herstellung eines einstückigen, metallischen mehrfachrades und mehrfachrad Download PDF

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Publication number
EP2083956B1
EP2083956B1 EP07815156A EP07815156A EP2083956B1 EP 2083956 B1 EP2083956 B1 EP 2083956B1 EP 07815156 A EP07815156 A EP 07815156A EP 07815156 A EP07815156 A EP 07815156A EP 2083956 B1 EP2083956 B1 EP 2083956B1
Authority
EP
European Patent Office
Prior art keywords
wheel
contour
tooth
toothed belt
gear
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
EP07815156A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2083956A1 (de
Inventor
Herbert Schmid
Wolfgang Siessl
Karl Dickinger
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
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Miba Sinter Austria GmbH
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Filing date
Publication date
Application filed by Miba Sinter Austria GmbH filed Critical Miba Sinter Austria GmbH
Publication of EP2083956A1 publication Critical patent/EP2083956A1/de
Application granted granted Critical
Publication of EP2083956B1 publication Critical patent/EP2083956B1/de
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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
    • 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
    • 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
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12229—Intermediate article [e.g., blank, etc.]
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19949—Teeth
    • Y10T74/19963—Spur

Definitions

  • the invention relates to a method for producing a one-piece, metallic multi-wheel for a traction mechanism drive according to the preamble of claim 1, as well as an integral, metallic Mehrfachrad according to the preamble of claim 5 (see, respectively WO-A-01/74514 ).
  • sprockets are already known from the prior art. So describes z. B. the DE 102 16 524 A a chain drive with two side by side and on multiple sprockets arranged drive chains. Such multiple sprockets are either formed in several pieces, wherein a plurality of single sprockets are connected to each other, but also in one piece, wherein a wheel body has a plurality of single gears with corresponding teeth on the outer peripheries.
  • the tooth geometry is determined both in the one-piece and in the multi-piece variant in the manufacturing process. It is therefore necessary to keep suitable molds and tools for each multi-sprocket with the particular tooth geometry.
  • Object objective invention is to provide a way to make the production of multiple wheels for a traction drive variable.
  • This object of the invention is solved by a method having the features of claim 1 or by a multi-wheel with the features of claim 5.
  • the respective desired wheel for example gear wheel, sprocket or toothed belt wheel
  • the respective desired wheel can be produced from a preform depending on the intended traction means, so that it is possible to prefabricate corresponding preforms independently of the final tooth geometry, thereby responding more quickly to customer demand can, in which only the appropriate deformation in the final tooth geometry is required. It is thus possible to produce these preforms in stock, so that production bottlenecks can be compensated by appropriate pre-production in times of lower capacity utilization.
  • the invention is thus to be seen in the fact that either the finished tooth contour of the chain or gear or the finished tooth contour of a toothed belt wheel is produced from the raw contours.
  • the non-cutting shaping in particular the rolling, is also achieved that the material waste in comparison to previous manufacturing processes in which the tooth geometry has been made from the original mold, can be significantly reduced.
  • the tooth height can be reduced before the forming, so that the variability of the tooth contour to be determined can be increased. It can thus be better responded to different diameters of single wheels.
  • the rough contour of the teeth is at least approximately evolvent-like, whereby the non-cutting deformation, so the material displacement, can be facilitated. It can thus be achieved with a lesser degree of wear of the forming tools or forming machines.
  • the preform may further consist of a sintered metal or a sintered metal alloy. It is advantageous, since such components have a more or less high porosity after the sintering, that the deformation can be facilitated in which the porosity is lowered at least in the outer region, that is, the component is compressed in these areas. Due to the higher density in the outer area of the component can also achieve a better wear resistance. In addition, a smoothing of the surface or a better surface quality is thus achieved, for example, the teeth have no transverse grooves, as they normally arise during the compression of a sintered metal powder due to the process.
  • the Fig. 1 and 2 show a preform 1 for producing a multi-wheel 2 for a traction mechanism drive.
  • traction drives are, for example, chain drives or belt drives (belt drive).
  • the two single wheels 3, 4 have a different diameter 11, 12 (FIG. FIG. 2 ) on.
  • the two single wheels 3, 4 have the same diameter 11, 12.
  • the multiple wheel 2 not only has two single wheels 3, 4 but that more than two, for example. 3, 4, 5, etc. multiple wheels 3, 4 are arranged. Also, there is the possibility that these single wheels 3, 4 have a different diameter or all single wheels 3, 4 have the same diameter, or more than two.
  • the multi-wheel 2 has two three single wheels 3, 4 with decreasing diameter 11, 12, wherein the teeth 9 of the single wheel 3 with the largest diameter 11 and optionally subsequent thereto single wheel are designed for a chain drive and the smallest single wheel 4 for the engagement of a toothed belt is formed.
  • the multi-wheel 2 has a central bore 13 for receiving a shaft or the like.
  • the multi-wheel 2 or the preform 1 of a Formed sintered metal or a sintered metal alloy may be formed, for example, on an aluminum, iron, copper, magnesium base. Examples of such sintered metal alloys can be found in DIN V 30 910 Part 4, page 3.
  • the production of sintered components comprises the process steps mixing the powder, optionally with additives and auxiliaries, powder compaction to a green compact, sintering of the green compact, optionally calibration and / or densification of the sintered component.
  • FIG. 3 shows a first embodiment variant for the transformation and final production of the tooth contour for the multi-wheel 2.
  • its tooth contour 14 is called a contour for a toothed belt, hereinafter toothed belt wheel contour 15, as a contour for a toothed chain, hereinafter referred to as sprocket contour 16 (dashed line) and shown as a rough contour 17 (dash-dotted line).
  • the rough contour 17 is preferably produced as a rough contour 17 for the production of teeth 10 for engagement of a toothed chain. In particular, this is the rough contour 17 after sintering of the respective preform 1.
  • the rough contour 17 of the tooth 10 in the region of a tooth flank 18 is thicker than a tooth flank thickness 19 of the finished tooth 10 for engagement of a toothed chain.
  • a non-cutting deformation wherein the material from the region of the excess of the tooth flank 18 in a tooth tip region 20 is at least partially spent.
  • a compression in the peripheral region of the tooth 10 of the sintered material can take place.
  • the deformation is designed so that at least part of the excess material of the rough contour 17 is again moved in the area of the tooth flank 18 in the direction of the tooth head region 20,
  • the tooth flank region 21 adjoining the tooth tip region 20 is broadened with respect to the rough contour 17 and, if necessary, also made of material during this deformation In the tooth neck region, the toothed belt wheel contour 15 can overlap with the rough contour 17 of the tooth 10.
  • FIG. 3 merely to illustrate the principle of the production of the multiple wheel 2 from the preform 1 ( FIG. 1 ) serve.
  • the rough contour 17 is in the variant after FIG. 3 formed approximately involute, whereby the advantage is achieved that sufficient material for the forming and / or compression is available to make it, as needed, a tooth 10 for a toothed chain or a toothed belt.
  • the maximum extent of the excess width in the region of the tooth flank 18 can have a value (in each case left or right oversize) which is selected from a range with an upper limit of at most 25%, based on the tooth flank thickness 19 of the sprocket contour 16 of the tooth 10. This upper limit is to be understood that the excess over the height of the tooth flank 18 is variable and can be based on the particular desired tooth geometry.
  • the oversize for relatively slender, small teeth 10 is different than for thicker, larger teeth 10. Compared over the entire tooth geometry of the finished tooth 10, the excess may range from -25% to + 25%, especially -20% to + 20%, fluctuate, as suggested Fig. 3 is apparent.
  • the preform 1 is symmetrical with respect to the tooth geometry, there is also the possibility that the extent of the oversize of the rough contour 17 with respect to the sprocket contour 16 on the left tooth flank is different from the right flank.
  • the single wheel 3 is formed in this variant as a sprocket, but may also be a gear. This single wheel preferably already has its final shape prior to forming the teeth 10 of the second single wheel 4.
  • FIG. 4 an embodiment of the invention is shown in which the tooth 10 of the Toothed belt wheel contour 15 (full lines) compared to the tooth 10 of the sprocket contour 16 (dashed lines) has a significantly lower tooth height 22.
  • the tooth 10 of the toothed belt wheel contour 15 can have a tooth height 22 that is half the tooth height 22 of the sprocket contour 16
  • a part of the tooth 10 in the tooth head region 20 is removed by machining, since such a large tooth Reduction can not be accomplished by forming alone.
  • the removal of the material of the tooth 10 follows, for example.
  • the tooth 10 of the toothed belt wheel contour 15 produced by the deformation has after the deformation in comparison to the embodiment according to FIG. 3 a larger tooth height 22 than the tooth height 24 of the rough contour 17, so it is more material removed than would be required solely due to the tooth height. This ensures that the material can be moved from the tooth flank region 18 in the region of the tooth head by the deformation.
  • the forming itself is plastic, in particular by rolling.
  • the forming itself can be carried out both as hot forming and as cold forming.
  • preforms 2 from which a multiple wheel 1 with at least one toothed, toothed belt or sprocket can be produced as required, the latter being produced from the preform 2 by non-cutting shaping.
  • a contour for a toothed belt or a sprocket a sprocket from a contour for a toothed belt or a gear or a gear from a contour for a toothed belt or sprocket a timing belt from a contour, where necessary, the rough contour of the Preform 2 also in the respective final contour for the originally envisaged teeth 9, 10 can be finished without cutting, so from the preform 2 for a gear a gear, the preform 2 for a sprocket sprocket or the preform 2 for a toothed belt a timing belt ,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Gears, Cams (AREA)
  • Forging (AREA)
  • Pulleys (AREA)
EP07815156A 2006-10-24 2007-10-22 Verfahren zur herstellung eines einstückigen, metallischen mehrfachrades und mehrfachrad Active EP2083956B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0177906A AT505150B1 (de) 2006-10-24 2006-10-24 Mehrfachrad
PCT/AT2007/000489 WO2008049145A1 (de) 2006-10-24 2007-10-22 Verfahren zur herstellung eines einstückigen, metallischen mehrfachrades, vorform zur herstellung desselben und mehrfachrad

Publications (2)

Publication Number Publication Date
EP2083956A1 EP2083956A1 (de) 2009-08-05
EP2083956B1 true EP2083956B1 (de) 2011-04-20

Family

ID=39106281

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07815156A Active EP2083956B1 (de) 2006-10-24 2007-10-22 Verfahren zur herstellung eines einstückigen, metallischen mehrfachrades und mehrfachrad

Country Status (9)

Country Link
US (1) US8911313B2 (enExample)
EP (1) EP2083956B1 (enExample)
JP (1) JP5363326B2 (enExample)
CN (1) CN101547758B (enExample)
AT (2) AT505150B1 (enExample)
CA (1) CA2667339A1 (enExample)
DE (1) DE502007007017D1 (enExample)
ES (1) ES2364861T3 (enExample)
WO (1) WO2008049145A1 (enExample)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5688983B2 (ja) * 2011-01-28 2015-03-25 アイダエンジニアリング株式会社 サーボプレスシステム
US20160236750A1 (en) * 2015-02-13 2016-08-18 Shimano Inc. Bicycle drive system
AT520531B1 (de) * 2018-04-24 2019-05-15 Miba Sinter Austria Gmbh Zahnrad
CN114653941B (zh) * 2022-03-29 2022-12-02 西北有色金属研究院 一种镍钛合金齿轮的粉末冶金制备方法

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3580029A (en) * 1968-12-05 1971-05-25 Lear Siegler Inc Rolling chamfers on gear teeth
US3867751A (en) * 1972-10-05 1975-02-25 Formflo Ltd Sintered blanks
US3874049A (en) * 1973-04-13 1975-04-01 Burdsall & Ward Co Method of making a powdered metal part having a bearing surface
US4708912A (en) * 1984-07-18 1987-11-24 Sintermetallwerk Krebsoege Gmgh Sintered metal body with at least one toothing
DD255492A1 (de) * 1986-10-29 1988-04-06 Textima Veb K Verfahren zur herstellung eines doppelzahnrades fuer den antrieb einer haushalt-waeschemangel
GB2250227B (en) * 1990-10-08 1994-06-08 Formflo Ltd Gear wheels rolled from powder metal blanks
US5711187A (en) * 1990-10-08 1998-01-27 Formflo Ltd. Gear wheels rolled from powder metal blanks and method of manufacture
CN2111154U (zh) * 1991-12-12 1992-07-29 国营857厂 粉末冶金齿轮毛坯
US5903815A (en) * 1992-02-12 1999-05-11 Icm/Krebsoge Composite powdered metal component
JPH072258B2 (ja) * 1992-06-25 1995-01-18 本田技研工業株式会社 歯形サイジング用ダイ
JP3448754B2 (ja) * 1995-08-23 2003-09-22 株式会社久保田鉄工所 歯車の転造成形方法及びその装置
US6134786A (en) * 1999-01-29 2000-10-24 Amsted Industries Incorporated Method for improvement of involute and lead error in powder metal gears
IT1307199B1 (it) * 1999-06-22 2001-10-29 Mini Gears Spa Procedimento per la realizzazione di ruote dentate da semilavoratiottenuti per sinterizzazione di polveri metalliche
US6250123B1 (en) * 1999-09-20 2001-06-26 Utica Enterprises, Inc. Method, apparatus and rack for making power transmission member
GB2360825B (en) * 2000-03-30 2004-11-17 Formflo Ltd Gear wheels roll formed from powder metal blanks
US6592809B1 (en) * 2000-10-03 2003-07-15 Keystone Investment Corporation Method for forming powder metal gears
AT409466B (de) * 2000-11-30 2002-08-26 Miba Sintermetall Ag Verfahren und vorrichtung zum herstellen eines zahnrades
CN1133520C (zh) * 2001-02-20 2004-01-07 华南理工大学 一种粉末冶金斜齿轮的温压成形方法
DE10216524A1 (de) 2002-04-15 2003-11-06 Ebert Kettenspanntechnik Gmbh Kettentrieb
JP2004074163A (ja) * 2002-08-09 2004-03-11 Aisan Ind Co Ltd 歯車転造装置及び歯車転造方法
JP2005344126A (ja) * 2002-10-04 2005-12-15 Hitachi Powdered Metals Co Ltd 焼結歯車
DE10357979B4 (de) * 2003-12-11 2006-10-05 Sfs Intec Holding Ag Torsionsstab zum Einsatz bei Gurtaufrollern für Sicherheitsgurte
CN1319467C (zh) 2004-05-27 2007-06-06 张英梅 野芙蓉蜂制品
CN1644266A (zh) * 2005-01-12 2005-07-27 刘宏伟 齿轮毛坯齿部挤制方法

Also Published As

Publication number Publication date
CN101547758A (zh) 2009-09-30
ATE506127T1 (de) 2011-05-15
ES2364861T3 (es) 2011-09-15
AT505150A4 (de) 2008-11-15
US8911313B2 (en) 2014-12-16
JP5363326B2 (ja) 2013-12-11
CN101547758B (zh) 2012-10-03
US20100279807A1 (en) 2010-11-04
JP2010507482A (ja) 2010-03-11
WO2008049145A1 (de) 2008-05-02
CA2667339A1 (en) 2008-05-02
EP2083956A1 (de) 2009-08-05
DE502007007017D1 (de) 2011-06-01
AT505150B1 (de) 2008-11-15

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