EP3107670A1 - Procédé et dispositif de production d'une roue dentée avec un moyen de serrage - Google Patents

Procédé et dispositif de production d'une roue dentée avec un moyen de serrage

Info

Publication number
EP3107670A1
EP3107670A1 EP15706215.9A EP15706215A EP3107670A1 EP 3107670 A1 EP3107670 A1 EP 3107670A1 EP 15706215 A EP15706215 A EP 15706215A EP 3107670 A1 EP3107670 A1 EP 3107670A1
Authority
EP
European Patent Office
Prior art keywords
gear
clamping means
clamping
gear blank
blank
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
Application number
EP15706215.9A
Other languages
German (de)
English (en)
Other versions
EP3107670B1 (fr
Inventor
Gerhard Kotthoff
Björn LEUPOLD
Frank WATTENBERG
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.)
GKN Powder Metallurgy Engineering GmbH
Original Assignee
GKN Sinter Metals Engineering 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 GKN Sinter Metals Engineering GmbH filed Critical GKN Sinter Metals Engineering GmbH
Publication of EP3107670A1 publication Critical patent/EP3107670A1/fr
Application granted granted Critical
Publication of EP3107670B1 publication Critical patent/EP3107670B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • B22F5/085—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 with helical contours

Definitions

  • the present invention relates to a method for producing at least one gear, a device for producing at least one gear, and a tensioning means therefor.
  • European patent EP 1 694 452 B1 describes a method of manufacturing a gear.
  • the compaction of the surface layer via a pusher tool in the form of at least one gear, which either has an engaging in the teeth of the powder metal blank outer teeth or internal teeth, with the aid of the sliding speed between the tooth flanks of the powder metal blank and the pusher tool can be reduced.
  • the object of the present invention is to enable an improvement of a gear quality of a gear and to provide a manufacturing method of a gear with good properties.
  • a method for producing at least one toothed wheel, in particular a helical toothed wheel, wherein the toothed wheel is produced from a toothed wheel pressed with an oversize in the toothed area and sintered, wherein the toothed wheel blank has two opposite end faces and one circumference.
  • the method comprises the following steps:
  • each individual tooth of the toothing of the gear blank is supported substantially over the entire tooth height by the clamping means.
  • the term allowance can here describe a negative and / or a positive allowance.
  • the tooth flank can have additional material that is distributed over the tooth flank during the compression process.
  • the blank may have an undersize on the tooth flank.
  • Negative oversize can be used to ensure that undesirable elevations do not occur when sintering material is displaced.
  • the negative allowance can therefore represent a region of a gear blank with a toothing that is to be replenished by, in particular, displacement of sintered material.
  • gear blank may in this case describe a green compact of a sintering process, in particular of a powder metallurgical process.
  • tool can in this case describe a pusher tool in the form of at least one toothed wheel, which either has an external toothing engaging in the toothing of the powder metal blank or an internal toothing.
  • the gear blank for axial clamping in the clamping means is axially clamped.
  • the rigidity of the front tooth ends can be increased, whereby the elastic deformation is reduced.
  • At least two gear blanks are clamped in the clamping means to produce at least two gears.
  • at least one tensioning element can be arranged between the respective front sides of the gear blanks which are not arranged directly adjacent to the pressure rings of the tensioning means and / or the at least two gear blanks can be arranged directly adjacent to one another.
  • the clamping of the gear blanks can be adapted to the existing clamping means and the existing tool, whereby no additional clamping means or tools must be purchased. As a result, the production costs, the dead times and the setup times for the production of the gear can be reduced.
  • the intervention of the at least one rotating tool in the teeth of the at least two gear blanks takes place simultaneously or sequentially.
  • the simultaneous or successive engagement of the tool in the toothing of the gear blanks can be carried out either by the same tool or by a plurality of tools, wherein in each case a tool engages in a gear blank.
  • the invention relates to a device for producing at least one gear, in particular a helical gear, with a clamping means for clamping at least one oversized and sintered gear blank for the gear and at least one tool which engages with a counter toothing in a toothing of the gear blank, wherein the clamping means is provided for axially clamping the gear blank, wherein the clamping means comprises a first and a second pressure ring, wherein the pressure rings support each tooth of the toothing of the gear blank between the pressure rings substantially over the entire tooth height.
  • the clamping means has a gear geometry identical to the gear blank. In this way it can be ensured that the clamping device is not damaged by the tool. Furthermore, it can further be ensured that the tensioning means supports the gear blank over the entire tooth height.
  • the toothing geometry of the clamping device has an equidistant undersize, with the toothing geometry of the clamping device tapering in the axial direction.
  • an equidistant undersize By using an equidistant undersize, a collision of the toothing of the clamping element can be avoided with the tool. Furthermore, it can be ensured by the axial taper that the tool can roll over the clamping means and the gear blank without a collision of the clamping means takes place with the tool.
  • the gear blank on at least one axially projecting shoulder and the clamping means has annular shoulders, wherein the paragraph over the annular shoulders is positively supported.
  • the at least one axially projecting shoulder of the gear blank may be circumferential and engage in the annular shoulders of the clamping device. In this way, a positive engagement can be ensured in the radial direction.
  • the provided in the field of gear blank paragraphs can be removed after the compression of the toothed area again.
  • At least one tooth of the toothing of the gear blank on the end face a recess or increase and at least one Spannffentechnik has an increase or depression, wherein the increase or depression of the at least one Spannffentechniks positively engages in the recess or increase the at least one tooth of the toothing of the gear blank ,
  • the elevation and the depression can have an arbitrary shape, for example an annular, polygonal, oval, cylindrical or trapezoidal shape.
  • a method described above can be carried out with the device.
  • at least one toothed wheel in particular a helical toothed wheel, can thus be produced with an improved toothing quality.
  • a device can be used as disclosed in EP 1 694 452 A1 or as disclosed in US Pat. No. 8,340,806.
  • a relative movement between tool and gear blank can preferably be calculated in advance and then implemented via a machine control of the device.
  • a plurality of gear blanks can be clamped in the clamping means, wherein between the respective end faces of the gear blanks, which are not arranged directly adjacent to the pressure rings of the clamping means, at least one clamping element is arranged.
  • the at least one tensioning element preferably has a toothing geometry identical to the gear blank. In this way it can be ensured that the clamping element is not damaged by the tool. Furthermore, it can be ensured that the clamping element supports the gear blank over the entire tooth height.
  • the device has at least two clamping elements, which have an identical or a different width.
  • the production of the gear can be adapted to the existing clamping means and tools.
  • the at least one clamping elements on the front side at least one annular shoulder, depression or increase.
  • a reproducible positioning of the gear blank, clamping element and clamping means can be ensured.
  • it can be ensured that the gear blank is securely clamped in the clamping means.
  • a positive connection can be ensured in this way in the radial direction.
  • the invention comprises a clamping means for a device for producing at least one gear, wherein the clamping means axially clamps the at least one gear blank, wherein the clamping means comprises a first and second pressure ring, wherein the clamping means has a gear geometry identical tooth geometry, wherein the tooth geometry of the Tensioning means tapers in the axial direction.
  • the clamping means is used in the proposed device and / or in the proposed method.
  • Fig. 1 shows a rolling arrangement
  • Fig. 2 shows a further rolling arrangement
  • FIG. 3 is a sectional view of a device in which a gear blank is clamped with a projecting shoulder in a clamping means
  • FIG. 4 is a sectional view of a device in which a gear blank without a protruding paragraph is clamped in a clamping means
  • 5a is a sectional view of a device in which a gear blank is clamped in a clamping means, wherein the gear blank has an increase and the clamping means has a recess,
  • FIG. 5b is a detail view of the detail A of Fig. 5a
  • Fig. 5c is a view of the end face of a tooth of the gear blank of Figure 5a and 5b
  • Fig. 6a is a further sectional view of a device in a gear blank in a
  • Clamping means is clamped, wherein the gear blank is an increase and the
  • Clamping means has a recess
  • 6b is a detail view of the detail B of FIG. 6a
  • 6c is a view of the end face of a tooth of the gear blank of Fig. 5a and 5b,
  • FIG. 7a shows a device with a clamping device, wherein a plurality of gear blanks are clamped by means of clamping elements spaced from each other,
  • Fig. 7c a third device with a clamping means in which a plurality of gear blanks are clamped by means of clamping elements spaced from each other, and
  • FIG. 8 shows a device with a clamping device in which a plurality of gear blanks are clamped immediately adjacent to each other
  • Fig. 9 is a schmalt view of a gear
  • Fig. 1 shows an exemplary Wälzan himself in a schematic view.
  • a first rolling tool 10 with a first toothing 12 is rotatably mounted about a first axis 14 in the direction of rotation 16.
  • the direction of rotation may change one or more times.
  • a first rotational orientation may point in a reverse direction than illustrated.
  • the first toothing 12 is in engagement with a second toothing 18 of a gear blank 20.
  • the gear blank 20 is rotatably mounted about a second axis 22. Accordingly, a second rotational direction 24 results.
  • the second toothing 18 is connected to a third rotational direction.
  • toothing 26 of a second tool 28 in engagement.
  • This second tool 28 is rotatably mounted about a third axis 30 in a third direction of rotation 32.
  • this Wälzan angel a compression of the gear blank 20 in the range of an allowance to be made by engaging at least the rotating tools 10 and 28 with a engaging in the toothing 18 of the gear blank 20 counter teeth 12 and 26.
  • FIG. 2 shows a schematic view of a further possibility of, for example, simultaneously being able to compress at least two gear blanks 20.
  • a movement of the gear blanks 20 in the direction of the tool 34 can take place.
  • two or more gear blanks 20 are arranged on a gear blank axis.
  • Fig. 3 shows a sectional view of a device 36 in which a gear blank 38 is clamped with a projecting shoulder 40 in a clamping means 42.
  • the clamping means 42 comprises two pressure rings 44 and 46 between which the gear blank 38 is clamped. It is shown that the pressure rings 44 and 46 support each individual tooth of the toothing of the gear blank 38 between the pressure rings 44 and 46 substantially over the entire tooth height.
  • the clamping means 42 clamped by means of the pressure rings 44 and 46, the gear blank 38 for radial clamping axially, whereby the rigidity of the front tooth ends of the gear blank 38 is increased and thereby the elastic deformation is reduced.
  • the tensioning means 42 has a gear geometry identical to the gear blank 38, which has an equidistant undersize for compensation of elastic influences in the axial direction. To avoid collisions with flank line angle optimal setting of the tools, the
  • Gearing geometry of the clamping means 42 tapers in the axial direction.
  • the geometry of the toothing produced in this way corresponds basically to beveloid toothing.
  • the pressure ring 46 has an annular shoulder 48 which supports the shoulder 40 in a form-fitting manner.
  • the paragraph 40 may be cylindrical and form a spline with the annular shoulder 48.
  • FIG. 4 shows a device 36 in which a gear blank 50 is clamped in the clamping element 42.
  • the gear blank 50 has no shoulder 40.
  • FIG. 5a, 5b, 5c show a device 36 in which a gear blank 52 is clamped in a tensioning means 42.
  • the detail A of FIG. 5a is shown enlarged in FIG. 5b.
  • a tooth 54 of the gear blank 52 has an elevation 56 on its end face, which is directly adjacent to the clamping means 42.
  • the increase Hung 56 engages in a recess 58 of a Spannffentechniks 60. By engaging the elevation 56 in the recess 58, a reproducible positioning of toothed wheel blank 52 and clamping means 42 can be ensured.
  • Fig. 5c is shown that the increase 56 has a round shape.
  • FIG. 6a, 6b, 6c show another embodiment of the device 36 in which a gear blank 62 is clamped in a clamping means 42.
  • FIG. 6b shows an enlargement of the detail B of FIG. 6a.
  • FIG. 6 b like FIG. 5 b, shows that a tooth 64 of the gear blank 62 has an elevation 66 on its end side, which is directly adjacent to the tensioning means 42.
  • the elevation 66 engages in a depression 68 of a tensioning tooth 70.
  • Fig. 6c is shown that the increase 66 has an oval shape.
  • FIG. 7 a shows a device 36 in which a plurality of gear blanks 72 are lined up axially and clamped in a tensioning means 42.
  • the respective end faces of the gear blanks 72 which are not arranged directly adjacent to the pressure rings 44, 46 of the clamping means 42, are arranged on clamping elements 74.
  • the clamping elements 74 have different widths.
  • the pressure rings 44, 46 of the clamping means 42 for example by means of nuts 76 and 78, the gear blanks 72 and the clamping elements 74 clamp.
  • nuts instead of nuts, however, other Verspannkomponenten can be used, which allow a distortion of gear blanks 72 and pressure rings 44, 46.
  • the clamping elements 74 have an identical tooth geometry as the gear blanks 72. Furthermore, the clamping elements 74 may have at least one annular shoulder, depression or elevation on the face side in order to form a reproducible positioning of gear blanks 72 and the respective clamping elements 74 with the gear blanks 72.
  • FIG. 7 b shows a further embodiment of a device 36 in which a plurality of gear blanks 80 and 82 are clamped in a tensioning means 42.
  • the respective end faces of the gear blanks 80, 82 which are not arranged immediately adjacent to the pressure rings 44, 46 of the clamping means 42, are arranged on clamping elements 74.
  • the clamped gear blanks 80 and 82 have different widths in this embodiment. You can also have the same widths as well as the same sizes.
  • the pressure rings 44, 46 of the clamping element 42 clamp in this embodiment without the aid of nuts 76, 78, the clamping elements 74 and the gear blanks 80, 82 a.
  • Fig. 7c shows a third embodiment of a device 36 in which a plurality of gear blanks 72 are clamped in a clamping means 42. As in Fig. 7a are between the respective end faces of the gear blanks 72, which are not arranged immediately adjacent to the pressure rings 44, 46 of the clamping means 42, arranged clamping elements 74.
  • the gear blanks 72 have the same width and the pressure rings 44, 46 of the clamping element 42 clamp in this embodiment without the aid of nuts 76, 78, the clamping elements 74 and the gear blanks 72 a.
  • FIG. 8 shows a further embodiment of a device 36 in which two gear blanks 84 are arranged between the pressure rings 44, 46 of the tensioning means 42.
  • the respective end faces of the gear blanks 84 which are not arranged directly adjacent to the pressure rings 44, 46 of the clamping means 42, are arranged relative to one another.
  • Fig. 9 shows a schematic side view of a gear 86.
  • a shoulder 88 can be machined if necessary by means of mechanical machining.
  • the mechanical processing may include, for example, milling, grinding and / or turning.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Processing (AREA)
  • Gears, Cams (AREA)

Abstract

L'invention concerne un procédé de production d'au moins une roue dentée, en particulier d'une roue dentée à denture hélicoïdale, la roue dentée étant produite à partir d'une ébauche de roue dentée (20, 38, 50, 52, 62, 72, 80, 82, 84) pressée et frittée avec un métré au niveau de la denture (18), l'ébauche de roue dentée (20, 38, 50, 52, 62, 72, 80, 82, 84) comportant deux faces frontales opposées et une périphérie. Dans le procédé, l'ébauche de roue dentée (20, 38, 50, 52, 62, 72, 80, 82, 84) est serrée dans un moyen de serrage (42). L'ébauche de roue dentée (20, 38, 50, 52, 62, 72, 80, 82, 84) est comprimé au niveau du métré par engagement d'au moins un outil rotatif (10, 28) comportant une denture homologue (12, 26) venant en prise dans la denture (18) de l'ébauche de roue dentée (20 , 38, 50, 52, 62, 72, 80, 82, 84), l'ébauche de roue dentée (20, 38, 50, 52, 62, 72, 80, 82, 84) étant serrée radialement sur la périphérie lors de sa compression au niveau des deux faces frontales par le moyen de serrage (42), chaque dent individuelle (56, 66) de la denture (18) de l'ébauche de roue dentée (20, 38, 50, 52, 62, 72, 80, 82, 84) étant supportée sensiblement sur toute la hauteur de la dent par le moyen de serrage (42). La qualité de la denture peut ainsi être améliorée. L'invention concerne également un dispositif et un moyen de serrage.
EP15706215.9A 2014-02-21 2015-02-20 Procédé de production d'une roue dentée Active EP3107670B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014002219.6A DE102014002219B4 (de) 2014-02-21 2014-02-21 Verfahren und Vorrichtung zur Herstellung eines Zahnrades nebst Spannmittel
PCT/EP2015/053566 WO2015124708A1 (fr) 2014-02-21 2015-02-20 Procédé et dispositif de production d'une roue dentée avec un moyen de serrage

Publications (2)

Publication Number Publication Date
EP3107670A1 true EP3107670A1 (fr) 2016-12-28
EP3107670B1 EP3107670B1 (fr) 2020-08-26

Family

ID=52577852

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15706215.9A Active EP3107670B1 (fr) 2014-02-21 2015-02-20 Procédé de production d'une roue dentée

Country Status (5)

Country Link
US (1) US10363598B2 (fr)
EP (1) EP3107670B1 (fr)
CN (1) CN106163694B (fr)
DE (1) DE102014002219B4 (fr)
WO (1) WO2015124708A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110090962B (zh) * 2018-01-31 2021-07-16 米巴精密零部件（中国）有限公司 用于制造同步毂的方法
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
US11707792B2 (en) * 2020-09-28 2023-07-25 GM Global Technology Operations LLC Scattered topography rolling of powered metal gears

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54142332A (en) * 1978-04-28 1979-11-06 Takeshi Suzuki Top roller
JPH0749132B2 (ja) 1985-09-04 1995-05-31 アイシン精機株式会社 歯車転造装置
US5659955A (en) * 1994-01-21 1997-08-26 Plamper; Gerhard Method of making powder metal helical gears
AT412955B (de) 2003-12-19 2005-09-26 Miba Sinter Austria Gmbh Verfahren zum herstellen eines zahnrades
US7025929B2 (en) * 2004-04-08 2006-04-11 Pmg Ohio Corp. Method and apparatus for densifying powder metal gears
DE102005027144A1 (de) 2005-06-10 2006-12-14 Gkn Sinter Metals Gmbh Oberflächenverdichtung einer Verzahnung
RU2284241C1 (ru) * 2005-06-27 2006-09-27 Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский Государственный политехнический университет" (ГОУ "СПбГПУ") Способ накатывания зубчатых профилей на биметаллических спеченных заготовках
AT503037B1 (de) * 2006-05-04 2007-07-15 Miba Sinter Austria Gmbh Verfahren zum herstellen eines zahnrades
US7395448B2 (en) * 2006-07-26 2008-07-01 International Business Machines Corporation Directly obtaining by application programs information usable in determining clock accuracy
WO2008139323A2 (fr) * 2007-05-11 2008-11-20 Stackpole Limited Procédé de laminage d'engrenage interne en métal pulvérulent
CN201744748U (zh) * 2010-07-27 2011-02-16 卫华集团有限公司 一种弹性滚齿夹具
CN203371384U (zh) * 2013-06-18 2014-01-01 玉环县中等职业技术学校 一种用于齿轮内孔加工的夹具

Also Published As

Publication number Publication date
WO2015124708A1 (fr) 2015-08-27
US20170072453A1 (en) 2017-03-16
DE102014002219B4 (de) 2015-12-10
US10363598B2 (en) 2019-07-30
EP3107670B1 (fr) 2020-08-26
CN106163694B (zh) 2018-03-13
DE102014002219A1 (de) 2015-08-27
CN106163694A (zh) 2016-11-23

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