EP2760605A1 - Method and apparatus for manufacturing a gear wheel with stub toothing - Google Patents
Method and apparatus for manufacturing a gear wheel with stub toothingInfo
- Publication number
- EP2760605A1 EP2760605A1 EP12766888.7A EP12766888A EP2760605A1 EP 2760605 A1 EP2760605 A1 EP 2760605A1 EP 12766888 A EP12766888 A EP 12766888A EP 2760605 A1 EP2760605 A1 EP 2760605A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- die
- teeth
- parts
- short
- receiving plate
- 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.)
- Granted
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
Definitions
- Gears with short gearing wherein in a first forming stage a Gangrad redesign 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, the mold ends pierce into the interdental spaces, is fully formed.
- a partial gear is manufactured separately with short teeth, which is then welded to the drive toothing bearing part of the gear wheel.
- the teeth of the short toothing are first produced by pressing in the die with parallel tooth flanks. This is followed by numerous forming steps by cold calibration until completion of the exact tooth shape of the short gearing. It is about the formation of a roof shape in the tooth tip area and a
- the present invention seeks to avoid the disadvantages of the known manufacturing process on a device and on a method of the type mentioned, in particular to enable the production of a short teeth on gear wheels, which is characterized by improved accuracy of the short teeth and a trouble-free permanent use guaranteed.
- the manufacturing process itself it should enable a high production rate with long service life of the die components.
- Tooth tips Due to the achieved thereby sharp-edged formation of the lower edges of the roof surfaces in the region of the tooth heads - in conjunction with the undercut of the tooth flanks - reliably errors by axial separation of the switched drive connection, so-called. Gang Jumpers avoided.
- a particularly advantageous embodiment is that the direction of the puncturing of the mold parts of the mold is selected obliquely to the foot space of the teeth, so that after complete filling of the Gesenkhohlform still excess material is displaced in an adjacent to the footwell Gesenkhohlraum.
- 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.
- the two mounting plates are axially fixed.
- the kinematics of the displacement of the molded parts has a decisive influence on the accuracy of the tooth formation.
- a method variant which is particularly suitable with regard to tool life and precision of the produced short toothing is that the short toothing is formed in two calibration steps, wherein the teeth of the short toothing are formed in a first calibration step with axially parallel tooth flanks 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 shaped parts of the molding tool are individual flat sliding parts, which are arranged circumferentially in planes perpendicular to the die axis with the circumferential pitch of the short teeth corresponding angular distances.
- a displacement of the sliding parts with high accuracy is achievable according to a further proposal of the invention in that the .Schiebewel between an upper and a lower receiving plate of the die out and in a direction radially inwardly from an initial position in a final tooth shape corresponding end position are displaced ,
- the Gangrad imbalance is mounted in the die, that the short teeth facing the teeth heads down.
- 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.
- the invention further proposes that upper and lower receiving plate are firmly connected to each other and limit guides for receiving the sliding parts and that - in another
- Embodiment - The lower receiving plate ends on its radially inner side with a collar part pointing toward the gear wheel body, the radially outer peripheral surface of which acts as a stop in the end position of the
- 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 an axial section through a first Kalibriergesenk
- Fig. 2 shows an axial section through a second Kalibriergesenk
- Fig. 3 is an enlarged partial view of Fig. 2 and
- Fig. 4 is a perspective view of the gear wheel after completion of the short teeth
- Fig. 1 shows the structure of a first Kalibriergesenks for cold calibration of the short teeth of a gear wheel for a manual transmission.
- Teeth 15 in the region of the tooth head 22 a precise roof shape with sharply formed roof edges 40 obtained.
- the tooth flanks on both sides of each tooth 15 run parallel to one another from the tooth head to the tooth root, ie after the first forming step of the cold calibration in the first calibration die according to FIG. 1, the teeth have a constant tooth width over their entire length.
- the Gesenk inconvenience according to Fig. 1 comprises from top to bottom a hold-down 2, which rests on the Gangradmaschine 1, which in turn is 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 and is connected by screws 12 with a base plate 10. A bearing on the base plate 10 die plate 11 engages in the inner die ring 8, on which the die 3 is mounted.
- 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 aufharmon on the outer cone 41 of the cone part 14.
- the outer cone 41 of the cone portion 14 is clearly shown on a gear wheel 1 with finished shaped short teeth 15.
- Short-toothing of the forged Gangrad stresses form precisely, both in the region of the roof-shaped tooth heads 22 (see Fig. 4) and in the region of the tooth flanks, there but initially with parallel
- Tooth flanks Their slope (shown in Fig. 4) with corresponding expansion of the interdental spaces in each case towards the tooth root is only in the second calibration step by using a mold with
- this forming tool 23 which essentially forms the lower die of the calibrating die according to FIG. 2, oblique tooth flanks are produced, as shown in FIG. 4 on the finished short toothing.
- the molding tool 23 is, as will be described in detail below, provided to process the intermediate spaces of the short teeth such that material from the tooth flanks in the Gesenkhohlform from the region of the tooth flanks by appropriate material displacement in the direction of the Zahnfuß Scheme, ie for
- Distance channel 18 is displaced towards.
- 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 pressed down 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 Ver Sliding movement of sliding parts 31 are incorporated.
- 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. For grooving the
- Sliding parts 31 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 second calibration step By the high accuracy of the shape of the short gearing produced in the preceding calibration step according to FIG. 1, it is possible for the second calibration step to limit the loading of the mold in favor of a long service life thereof.
- 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.
- Die cavity can be displaced, which is located below the spacer channel 16 (Fig. 3).
- the slant of the sliding direction of the sliding parts 31 is advantageously between 5 ° and 20 °, using the example of the calibration die shown in FIG. 2 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.
- FIG. 2 shows 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.
- Fig. 3 can also be seen 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.
- the end position PE of the sliding part shown in Fig. 3 corresponds to its representation in Fig. 2, right side.
- the drawn in Fig. 3 dashed retracted position PA corresponds to the representation of the sliding part 31 of 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.
- the gear wheel with ready-formed short teeth can be opened after opening the die, i. with recessed into their starting position PA sliding parts and lifting the pressure plate 25, at the bottom of the actuating ring 35 is attached, are removed upwards from the lower die. In this case, the tooth heads 22 of the short teeth down. Thereafter, the drive teeth are cut into the tooth body 21 in a machining process. It goes without saying that previously the outer circumference of the tooth body 21 are machined centrally together with the central bore of the gear wheel and the cone part 14.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
- Forging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011114504A DE102011114504A1 (en) | 2011-09-29 | 2011-09-29 | Method and device for producing a gear wheel with short toothing |
PCT/EP2012/003968 WO2013045064A1 (en) | 2011-09-29 | 2012-09-22 | Method and apparatus for manufacturing a gear wheel with stub toothing |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2760605A1 true EP2760605A1 (en) | 2014-08-06 |
EP2760605B1 EP2760605B1 (en) | 2017-01-11 |
Family
ID=46968133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12766888.7A Active EP2760605B1 (en) | 2011-09-29 | 2012-09-22 | Method and apparatus for manufacturing a gear wheel with stub toothing |
Country Status (6)
Country | Link |
---|---|
US (1) | US9399251B2 (en) |
EP (1) | EP2760605B1 (en) |
JP (1) | JP6087930B2 (en) |
CN (1) | CN103998158B (en) |
DE (1) | DE102011114504A1 (en) |
WO (1) | WO2013045064A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013016048B3 (en) * | 2013-09-27 | 2015-02-05 | Sona Blw Präzisionsschmiede Gmbh | Method for producing a gearshift by forming |
DE102014002871A1 (en) * | 2014-03-05 | 2015-09-10 | Sona Blw Präzisionsschmiede Gmbh | Calibration die for cold calibration of gear teeth of gears |
CN104722693B (en) * | 2015-03-17 | 2017-11-21 | 青阳县鑫安特汽车零配件有限公司 | A kind of automobile roller gear forging and forming device |
DE102016006589B4 (en) * | 2016-05-28 | 2021-06-10 | Form Technology Gmbh | Method and device for producing longitudinal grooves in cylindrical components |
CN106003481B (en) * | 2016-06-16 | 2018-04-20 | 温州恒田模具发展有限公司 | A kind of high accuracy binodal Gear Processing mechanism |
CN106141059B (en) * | 2016-07-22 | 2017-12-19 | 宁海县博楷迪自动化科技发展有限公司 | A kind of driving wheel forging and stamping processing mold and its forming method |
CN108916358A (en) * | 2018-07-18 | 2018-11-30 | 杭州知加网络科技有限公司 | A kind of mechanical gear |
CN113478188B (en) * | 2021-07-28 | 2022-07-29 | 重庆创精温锻成型有限公司 | Parking gear tooth profile lateral extrusion forming method |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2040413C3 (en) | 1969-08-15 | 1974-04-11 | Toyota Jidosha Kogyo K.K., Toyota, Aichi (Japan) | Process for cold production of the spline of a gearbox for a motor vehicle |
DE3427156C2 (en) * | 1984-07-24 | 1986-07-17 | Bayerisches Leichtmetallwerk Graf Blücher von Wahlstatt GmbH & Co KG, 8000 München | Method for producing a synchronous part with undercut teeth |
JP2719828B2 (en) * | 1989-03-30 | 1998-02-25 | 株式会社ヤマナカゴーキン | Gear Forging Die Equipment |
JP3469275B2 (en) * | 1993-09-07 | 2003-11-25 | サムテック株式会社 | Method and apparatus for manufacturing gear base material |
CN1102144A (en) * | 1993-10-26 | 1995-05-03 | 青岛建筑工程学院 | Spur gear precision die stamping-push-press forming process and its equipment |
JP3108710B2 (en) * | 1997-12-26 | 2000-11-13 | 株式会社メタルアート | Method of manufacturing gear for transmission |
JP3195771B2 (en) * | 1998-04-08 | 2001-08-06 | 三菱製鋼株式会社 | Gear for integrated transmission and method of forming the same |
JP2001001101A (en) * | 1999-06-22 | 2001-01-09 | Samtec Kk | Production device of gear with spline |
JP3587785B2 (en) * | 2000-04-21 | 2004-11-10 | 株式会社ゴーシュー | Method of manufacturing gear for transmission |
JP4814118B2 (en) * | 2007-02-08 | 2011-11-16 | 本田技研工業株式会社 | Gear forming method and apparatus |
JP4734267B2 (en) * | 2007-02-08 | 2011-07-27 | 本田技研工業株式会社 | Gear forming equipment |
-
2011
- 2011-09-29 DE DE102011114504A patent/DE102011114504A1/en not_active Withdrawn
-
2012
- 2012-09-22 CN CN201280058809.9A patent/CN103998158B/en not_active Expired - Fee Related
- 2012-09-22 US US14/348,265 patent/US9399251B2/en active Active
- 2012-09-22 EP EP12766888.7A patent/EP2760605B1/en active Active
- 2012-09-22 WO PCT/EP2012/003968 patent/WO2013045064A1/en active Application Filing
- 2012-09-22 JP JP2014532268A patent/JP6087930B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2013045064A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP6087930B2 (en) | 2017-03-01 |
CN103998158A (en) | 2014-08-20 |
DE102011114504A1 (en) | 2013-04-04 |
US9399251B2 (en) | 2016-07-26 |
US20140223985A1 (en) | 2014-08-14 |
CN103998158B (en) | 2016-01-20 |
WO2013045064A1 (en) | 2013-04-04 |
JP2014528839A (en) | 2014-10-30 |
EP2760605B1 (en) | 2017-01-11 |
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