EP2760605B1 - Verfahren und vorrichtung zur herstellung eines gangrads mit kurzverzahnung - Google Patents

Verfahren und vorrichtung zur herstellung eines gangrads mit kurzverzahnung Download PDF

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Publication number
EP2760605B1
EP2760605B1 EP12766888.7A EP12766888A EP2760605B1 EP 2760605 B1 EP2760605 B1 EP 2760605B1 EP 12766888 A EP12766888 A EP 12766888A EP 2760605 B1 EP2760605 B1 EP 2760605B1
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EP
European Patent Office
Prior art keywords
mould
die
parts
tooth
calibration
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
EP12766888.7A
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German (de)
English (en)
French (fr)
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EP2760605A1 (de
Inventor
Jens POSPISCHIL
Anton Schmid
Norbert KOTULLA
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.)
Sona BLW Prazisionsschmiede GmbH
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Sona BLW Prazisionsschmiede GmbH
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Publication of EP2760605A1 publication Critical patent/EP2760605A1/de
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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

Definitions

  • Method and apparatus for producing a gear wheel with short gearing wherein in a first forming step a Gangradrati is forged in the die and the short gearing in at least one other forming stage by cold calibration in the die by means of a molding tool with fan-like arranged moldings, pierce the mold ends in the interdental spaces, finished becomes.
  • a known device JP 2258130 A of the type mentioned has in the radial direction to the die axis movable moldings, which are guided between an upper and a lower receiving plate and which together with their inner ends form a calibration tool for calibrating the short teeth.
  • the present invention has the object to significantly improve the accuracy of the short teeth on a device and on a method of the type mentioned in the production of the short teeth of a gear wheel and thereby to ensure a trouble-free permanent die insert.
  • the production process as such, it should in particular enable a high production rate with long service life of the die components.
  • the gear wheel body is resiliently pressed against the upper receiving plate under a hydraulic load during the cold calibration, while the molded parts are displaced inwardly against a stop between the upper and lower receiving plates.
  • a method variant which is particularly suitable with regard to the tool life and precision of the short toothing produced is that the short toothing is formed in two calibration steps, wherein the teeth of the short toothing are formed with axially parallel tooth flanks in a first calibration step and in a second calibration step by means of the molded parts of the molding tool finished with undercut of the tooth flanks and subsequent fatigueausrundung finished.
  • the initially axially parallel forged tooth flanks of the short toothing advantageously receive their undercut only through the calibration step by means of the diversified molding tool.
  • the mold parts of the mold are individual flat sliding parts, which are arranged circumferentially in axial planes corresponding to the Gesenkachse with the circumferential pitch of the short toothing corresponding angular distances and with high accuracy between an upper and a guided lower receiving plate of the die and in a direction radially inward from a starting position in a finished tooth shape corresponding end position are displaceable, wherein the displacement of the sliding parts is directed obliquely to the die axis approximately against the foot region of the short teeth.
  • a suitable slope of the sliding direction is between 5 ° and 20 °, preferably between 10 ° and 15 ° and more preferably about 12 °.
  • the sliding parts are moved both radially and axially until reaching a radially inner stop position.
  • upper and lower receiving plate are firmly connected and limit guides for receiving the sliding parts and that - in a further embodiment - the lower receiving plate on its radially inner side ends with a gear wheel body facing collar part, the radially outer peripheral surface serves as a stop in the end position of the sliding parts.
  • the collar part has the additional advantage that its upper side forms a seat for supporting an annular projection of the Gangrad stressess, so the Gesenkstatik is useful.
  • a sliding parts enveloping the outside actuating ring, in the vertical displacement of the Sliding parts via interlocking conical pressure surfaces on sliding parts and actuating ring in its final position are displaced until it rests against the circumference of the collar part.
  • Fig. 1 shows the construction of a first Kalibriergesenks for cold calibration of the short teeth of a gear wheel for a manual transmission.
  • a forged in a previous forging gear body 1 is inserted into the first Kalibriergesenk.
  • the already formed in the forging die (not shown) teeth of the short teeth are improved in terms of their dimensional accuracy.
  • This improvement is in addition to a high dimensional accuracy of the radial dimensions, in particular, that the Teeth 15 (see. Fig. 4 ) in the region of the tooth head 22 a precise roof shape with sharply formed roof edges 40 obtained.
  • each tooth 15 run parallel to each other from the tooth head to the tooth root, ie, the teeth have after the first forming step of the cold calibration in the first Kalibriergesenk according to Fig. 1 a constant over their entire length tooth width.
  • the Gesenk inconvenience after Fig. 1 comprises from top to bottom a hold-down 2, which rests on the Gangradmaschine 1, which is in turn received from below in the die 3 of the lower die.
  • An ejector 4 engages with its upper end in the central bore 5 of the Gangrad stressess 1 by being received with a peripheral edge 6 of its end face in an extension of the central bore 5.
  • Downholder 2 and die 3 are each fitted within cylindrical housing parts. In this way, the hold-down 2 is guided within a guide ring 7 and the die 3 is fixed within a first Gesenkrings 8, which in turn sits within an outer Gesenkrings 9, which is connected by screws 12 to a base plate 10. A bearing on the base plate 10 die plate 11 on which the die 3 is mounted, engages in the inner die ring.
  • the Gangradoasa 1 has a central bore 5 surrounding hub portion 13, which ends at the bottom with a cone portion 14.
  • the outer cone of the cone part 14 is used when switching the gear wheel to adapt the rotational speed of a coupling sleeve to that of the gear wheel by means of a synchronizer ring, the inner cone auf216 on the outer cone 41 of the cone part 14.
  • Fig. 4 the outer cone 41 of the cone part 14 on a gear wheel 1 with ready-formed short teeth 15 is clearly shown.
  • a toothed body 17 connects radially outwardly via a spacer channel 16, on the outer circumference of the short teeth 15 as in Fig. 4 shown, is formed.
  • a stop ring 19 which limits the axial movement of the coupling sleeve. Only then continues in the radial direction outward, a relatively wide spacer groove 20 to the outer gear body 21 toward, which is provided for the yet to be produced by cutting the drive gear of the gear wheel.
  • first Kalibriergesenks succeeds to precisely shape the short teeth of the forged Gangrad stresses, both in the area of the roof-shaped tooth heads 22 (see. Fig. 4 ) as well as in the area of the tooth flanks, but there initially still with parallel tooth flanks.
  • Theirs (in Fig. 4 shown) bevel with corresponding expansion of the interdental spaces in each case towards the tooth root is produced only in the second calibration step by using a molding tool with fan-shaped parts, as in FIG Fig. 2 shown.
  • this mold 23 which substantially the lower die of Kalibriergesenks according to Fig. 2 forms oblique tooth flanks are generated, as in Fig. 4 shown on the finished short gearing.
  • the molding tool 23 is, as will be described in detail below, provided to process the intermediate spaces of the short teeth such that from the region of the tooth flanks by material displacement material from the tooth flanks in the Gesenkhohlform in toward the Zahnfuß Scheme, ie to the gutter 18 is displaced.
  • the calibration die according to Fig. 2 comprises between a pressure plate 25 of the upper die and an outer support ring 26 of the lower die a hold-down 27 which is depressed by the pressure plate 25 by means of elastomeric compression springs 28.
  • the hold-down 27 is designed with its lower mold surface such that it engages over the entire surface in the shape of the Gangrad stressess 1 and holds in this way the Gangrad redesign 1 with its outer gear body 21 in support on an upper receiving plate 29.
  • the upper receiving plate 29 is fixedly connected to a lower receiving plate 30, in which guides to allow a radial displacement movement are incorporated by sliding parts 31.
  • the sliding parts 31 have in their radially outer region upwardly to the die axis conically projecting pressure surfaces 32, which cooperate with correspondingly formed pressure surfaces 33 of an associated with the pressure plate 25 via screws 34 actuating ring 35. Accordingly, the sliding members 31 are displaced inward in the radial direction when the actuating ring 35 with the pressure plate 25 moves down to the hold-down 27 by means of the springs 28 reaches its lower end position.
  • the sliding parts 31 each have a forming end 36, which causes the formation of the interdental spaces in the inner position of the sliding parts 31 by piercing into this and causes the undercut of the short teeth in the flank region of the teeth.
  • Each sliding part 31 serves to form only one interdental space, which is limited by the two flanks of adjacent teeth.
  • these are precisely guided between the upper receiving plate 29 and the lower receiving plate 30, so that the formation of an exact tooth shape is ensured.
  • the exact inner end position of the sliding parts is ensured by a stop which is formed on the lower receiving plate 30.
  • the lower receiving plate 30 terminates on its radially inner ren side with a gear wheel body 1 facing collar part 37, the radially outer peripheral surface 38 serves as a stop in the inner end position of the sliding parts 31.
  • the slope of the sliding direction of the sliding parts 31 is advantageously between 5 ° and 20 °, using the example of FIG Fig. 2 shown Kalibriergesenks about 12 °.
  • the collar 37 of the lower receiving plate 30 is used with its upper end face of the support of the toothed body 17 of the Gangrad stressess 1, so that disturbing vibrations in the engagement region of the molding ends 36 of the sliding parts 31 are avoided.
  • the in Fig. 3 shown schematic section to Fig. 2 represents a sliding part 31 in two positions of its inner edge, namely in dashed lines in the retracted starting position PA and with solid lines in its shaping end position PE.
  • Above the molding end 36, namely between its upper contour and the adjacent spacer channel 16 there is a narrow die cavity into which excess material formed during the shaping of the interdental space can flow without material overlaps occurring.
  • This favorable displacement direction of the material results from the fact that the sliding part is guided obliquely upwards towards the die axis, so that the explained direction of the material displacement into the tooth root area and, if necessary, into the spacing channel 16 necessarily results.
  • Fig. 3 can be seen also the axial extent of the sliding part 31, namely to the lower edge 39, which rests in a groove in the lower receiving plate 30 and is slidably mounted within this groove.
  • end position PE of the sliding part corresponds to its representation in Fig. 2 , right side.
  • dashed drawn retracted position PA corresponds to the representation of the sliding part 31 according to Fig. 2 , left side.
  • the attachment of the upper receiving plate 29 on the lower receiving plate 30 is not shown in detail in the drawing.
  • the upper receiving plate 29 is as continuous annular plate formed, wherein it limits the guide of the sliding parts 31 upwards with its underside, such that the sliding parts 31 are guided on all sides.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)
  • Forging (AREA)
EP12766888.7A 2011-09-29 2012-09-22 Verfahren und vorrichtung zur herstellung eines gangrads mit kurzverzahnung Active EP2760605B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011114504A DE102011114504A1 (de) 2011-09-29 2011-09-29 Verfahren und Vorrichtung zur Herstellung eines Gangrads mit Kurzverzahnung
PCT/EP2012/003968 WO2013045064A1 (de) 2011-09-29 2012-09-22 Verfahren und vorrichtung zur herstellung eines gangrads mit kurzverzahnung

Publications (2)

Publication Number Publication Date
EP2760605A1 EP2760605A1 (de) 2014-08-06
EP2760605B1 true EP2760605B1 (de) 2017-01-11

Family

ID=46968133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12766888.7A Active EP2760605B1 (de) 2011-09-29 2012-09-22 Verfahren und vorrichtung zur herstellung eines gangrads mit kurzverzahnung

Country Status (6)

Country Link
US (1) US9399251B2 (ja)
EP (1) EP2760605B1 (ja)
JP (1) JP6087930B2 (ja)
CN (1) CN103998158B (ja)
DE (1) DE102011114504A1 (ja)
WO (1) WO2013045064A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106003481A (zh) * 2016-06-16 2016-10-12 温州恒田模具发展有限公司 一种高精度双节齿轮加工机构

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013016048B3 (de) * 2013-09-27 2015-02-05 Sona Blw Präzisionsschmiede Gmbh Verfahren zur Herstellung eines Getriebeschaltrads durch Umformen
DE102014002871A1 (de) * 2014-03-05 2015-09-10 Sona Blw Präzisionsschmiede Gmbh Kalibriergesenk zum Kaltkalibrieren von Laufverzahnungen von Getriebegangrädern
CN104722693B (zh) * 2015-03-17 2017-11-21 青阳县鑫安特汽车零配件有限公司 一种汽车圆柱齿轮锻造成型装置
DE102016006589B4 (de) * 2016-05-28 2021-06-10 Form Technology Gmbh Verfahren und Vorrichtung zur Herstellung von Längsnuten in zylindrischen Bauteilen
CN106141059B (zh) * 2016-07-22 2017-12-19 宁海县博楷迪自动化科技发展有限公司 一种驱动轮锻压加工模具及其成型方法
CN108916358A (zh) * 2018-07-18 2018-11-30 杭州知加网络科技有限公司 一种机械齿轮
CN113478188B (zh) * 2021-07-28 2022-07-29 重庆创精温锻成型有限公司 驻车齿轮齿形侧向挤压成型方法

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DE3427156C2 (de) * 1984-07-24 1986-07-17 Bayerisches Leichtmetallwerk Graf Blücher von Wahlstatt GmbH & Co KG, 8000 München Verfahren zum Herstellen eines Synchronteils mit hinterschnittenen Zähnen
JP2719828B2 (ja) 1989-03-30 1998-02-25 株式会社ヤマナカゴーキン ギアの鍛造金型装置
JP3469275B2 (ja) 1993-09-07 2003-11-25 サムテック株式会社 歯車素形材の製造方法及び製造装置
CN1102144A (zh) * 1993-10-26 1995-05-03 青岛建筑工程学院 直齿圆柱齿轮精密模锻-推挤成型工艺及装置
JP3108710B2 (ja) * 1997-12-26 2000-11-13 株式会社メタルアート 変速用歯車の製造方法
JP3195771B2 (ja) * 1998-04-08 2001-08-06 三菱製鋼株式会社 一体型変速機用歯車及びその成形方法
JP2001001101A (ja) * 1999-06-22 2001-01-09 Samtec Kk スプライン付き歯車の製造装置
JP3587785B2 (ja) * 2000-04-21 2004-11-10 株式会社ゴーシュー 変速用歯車の製造方法
JP4814118B2 (ja) * 2007-02-08 2011-11-16 本田技研工業株式会社 歯車成形方法及び装置
JP4734267B2 (ja) * 2007-02-08 2011-07-27 本田技研工業株式会社 歯車成形装置

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Publication number Priority date Publication date Assignee Title
CN106003481A (zh) * 2016-06-16 2016-10-12 温州恒田模具发展有限公司 一种高精度双节齿轮加工机构

Also Published As

Publication number Publication date
US20140223985A1 (en) 2014-08-14
JP6087930B2 (ja) 2017-03-01
JP2014528839A (ja) 2014-10-30
CN103998158B (zh) 2016-01-20
DE102011114504A1 (de) 2013-04-04
CN103998158A (zh) 2014-08-20
WO2013045064A1 (de) 2013-04-04
EP2760605A1 (de) 2014-08-06
US9399251B2 (en) 2016-07-26

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