EP3579986B1 - Procédé de fabrication d'engrenages à denture hélicoïdale - Google Patents

Procédé de fabrication d'engrenages à denture hélicoïdale Download PDF

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Publication number
EP3579986B1
EP3579986B1 EP18704962.2A EP18704962A EP3579986B1 EP 3579986 B1 EP3579986 B1 EP 3579986B1 EP 18704962 A EP18704962 A EP 18704962A EP 3579986 B1 EP3579986 B1 EP 3579986B1
Authority
EP
European Patent Office
Prior art keywords
profile
toothing
die
helical
produced
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
EP18704962.2A
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German (de)
English (en)
Other versions
EP3579986A1 (fr
Inventor
Thomas Schimmer
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.)
Audi AG
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Audi AG
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Filing date
Publication date
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Publication of EP3579986A1 publication Critical patent/EP3579986A1/fr
Application granted granted Critical
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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
    • B21K1/305—Making machine elements wheels; discs with gear-teeth helical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/18—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes from stock of limited length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/10—Making finned tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/02—Dies; Selection of material therefor; Cleaning thereof

Definitions

  • the invention relates to a method and a device for producing a round solid or hollow profile made of metal, which is formed with helical teeth on its outer circumference and / or inner circumference.
  • the invention also relates to a method for producing helical gears.
  • the starting point of the invention is the manufacture of helical gears.
  • the teeth of a helical tooth system have a non-parallel or inclined arrangement with respect to the axis of rotation of the gear wheel. Usually it is a running gear.
  • the manufacture of a helical toothing is more complex and associated with higher manufacturing costs.
  • the production of a helical toothing can be done by machining, for example by means of hobbing.
  • the production can also take place in an original form, for example.
  • sintering such as. B. in the DE 691 03 109 T2 described.
  • the production can be done transforming, such. B. in the
  • the invention is intended to provide a further possibility for producing helical gears, in particular to save costs.
  • the invention comprises a method for producing helical gears, which on the outer circumference with a helical toothing are formed. Further developments of the invention result analogously for all subjects of the invention from the dependent patent claims, the following description and the drawing.
  • a profile is understood to mean an elongated component with a defined cross section.
  • a round full profile has a full-area and approximately circular cross section.
  • a round hollow profile has an approximately circular cross-section or hollow cross-section.
  • the full profile is designed with helical teeth on its outer circumferential surface.
  • the hollow profile can be formed with helical teeth on its outer peripheral surface and / or inner peripheral surface.
  • Drawing is understood to mean the production of the profile by drawing it through a shaping die (drawing die), similar to wire drawing.
  • Pressing is understood to mean the production of the profile by means of pressing through a shaping die (press die), similar to extrusion.
  • Both are continuous forming processes of massive forming and can also be combined with one another.
  • a cylindrical solid material in particular a Round rod or a tube, in particular a thick-walled tube, can be used.
  • the starting material is a metal, such as aluminum and, in particular, steel.
  • the profile produced is therefore a metal profile, for example an aluminum profile and in particular a steel profile.
  • the shaping die has at least one negative toothing contour on which the external toothing is formed during drawing or pulling through.
  • the toothing contour of the die is designed with a twist, i. That is, the grooves forming the teeth have at least approximately a helical course.
  • the rotational movement takes place freely; H. without drive.
  • the drawing of the profile can be cold, i. H. by cold drawing, or warm, d. H. done by hot drawing.
  • the starting material is heated and processed above room temperature.
  • the profile produced can have an (axial) length between 0.5 m and 25 m and preferably between 4 m and 12 m.
  • the one in making The helical toothing generated and likewise having a twist extends uninterruptedly essentially over the entire axial length.
  • the outer diameter of the profile can be 15 mm to 200 mm, preferably 20 mm to 100 mm and particularly preferably 35 mm to 80 mm, whereby the profile outer diameter can essentially correspond to the outer diameter of the gears to be produced from the profile (see below).
  • a device not according to the invention for producing a round solid or hollow profile made of metal, which is formed on the outer circumference and / or on the inner circumference with a helical toothing comprises a drawing or pressing die which has at least one (negative) toothing contour that forms the helical toothing, the Tooth contour is formed with a twist.
  • the drawing or pressing die is rotatably mounted.
  • the die can rotate freely.
  • a drive e.g. consisting of a motor and gear
  • the generated die rotary movement and the profile feed or withdrawal are preferably coordinated with one another, as already explained.
  • the device not according to the invention can also have a pull rod or the like, which applies the tensile force required for pulling or pulling through to the profile, this pull rod can be rotatably mounted to allow a rotary movement of the to enable generated profile.
  • the device not according to the invention can also have a profile guide or the like, which the profile produced during pressing or pressing through receives, this profile guide can be rotatably mounted to enable a rotary movement of the profile generated during pressing.
  • the described method according to the invention enables the production of a profile designed with helical teeth, which is then used as a semi-finished product for the production of helical gears.
  • the cross-section of the profile corresponds at least approximately to the cross-section or frontal section of the gear wheels to be produced, so that the further manufacturing effort for finishing the gear wheels is low.
  • no complex hobbing is required to complete the helical gears on the gears to be produced, but only gear grinding, since the production of the helical profile already achieves a gearing quality and accuracy that at least corresponds to that of hobbing, and in practice this even surpasses.
  • the profile is preferably manufactured in such a way that less than 0.1 mm has to be removed during subsequent gear grinding.
  • Further processing steps for finishing the gears can be: deburring, drilling, boring, facing, hardening (for example case hardening or nitriding), blasting, phosphating and the like.
  • the solid spur gear 200 shown is formed on its outer circumference with helical teeth 220 and has a central bore 210.
  • the gear wheel 200 formed from a steel material can also be formed on its inner circumference 215 with a toothing, possibly also with a helical toothing.
  • the axis of rotation is denoted by L.
  • the gear 200 has z. B. has a diameter of 40 mm to 60 mm and is used in particular as a gear part.
  • the gear 200 is made from a profile 110 (see Fig. 2 ), which is already provided with helical teeth 120 on its outer circumference. Sections or disks are cut down from this profile 110, which then form gears according to FIG Fig. 1 further processed as described above.
  • the toothing of the profile 110 already has a near net shape preform, so that the manufacturing effort for the completion of a gear 200 is comparatively low.
  • Fig. 2 shows a device 300 for producing a solid profile 110 formed with an external helical toothing 120.
  • the starting material 100 received and heated in a recipient 310 is continuously drawn through a die 320, the strand-like round solid profile 110 being generated, as illustrated by the feed arrow U.
  • the forming force is not applied by means of a punch 330 but rather by means of a pull rod 340.
  • the axial direction L corresponds to the axis of rotation of the gear 200.
  • the die 320 has a negative tooth contour 325 (see FIG Fig. 3 ), with which the external toothing 120 is formed on the profile 110 during pulling.
  • the toothing contour 325 of the die 320 is designed with a twist, as in FIG Fig. 3 shown.
  • the die 320 and / or the pull rod 340 are rotatably mounted accordingly.
  • a motor drive M for generating the rotary movement D is dispensed with.
  • the diameter of the profile 110 corresponds essentially to the diameter of the further gear 200 produced therefrom and is z. B. 40 mm to 60 mm.
  • the continuous forming process can be designed in such a way that there is no significant change in diameter in the die 320, but that only the helical external toothing 120 is formed.
  • the bore 210 in the gear wheel 200 can be produced by drilling and / or turning out the sections or disks separated from the profile 110, which function as it were as preformed blanks near net shape.
  • a mandrel (not shown) belonging to the die 320
  • a hollow profile 110 or hollow profile can also be produced.
  • a tube can already be used as the starting material 100, which is optionally supported during shaping by means of a mandrel or whose inner diameter is changed during shaping using a mandrel.
  • the inside diameter of a hollow profile produced from a solid material or pipe preferably corresponds essentially to the later bore diameter (of the gearwheel) or is a preliminary dimension that has yet to be machined (final dimension + machining allowance).
  • a toothing or the like can also be formed on the inner circumference of a hollow profile.

Landscapes

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

Claims (5)

  1. Procédé de fabrication de roues dentées (200) à denture hélicoïdale,
    comprenant les étapes :
    - la fabrication d'un profil plein ou creux rond (110) en métal qui est réalisé au niveau de la périphérie extérieure avec une denture hélicoïdale (120), dans lequel le profil (110) est fabriqué par étirage par une matrice (320) réalisée avec un contour de denture (325), pour quoi le contour de denture (325) présente une hélice et la matrice (320) ou le profil (110) réalise par le logement rotatif de la matrice (320) ou par le logement rotatif de la tige de traction (340) utilisée pour l'étirage un mouvement de rotation (D) libre ;
    - la mise à disposition du profil (110) ;
    - la division du profil (110) en disques individuels qui sont encore traités ensuite pour former des roues dentées (200) à denture hélicoïdale.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    les dentures hélicoïdales (220) au niveau des roues dentées (200) à fabriquer sont finies seulement par rectification de denture.
  3. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    l'étirage du profil (110) est effectué à chaud.
  4. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    le profil fabriqué (110) présente une longueur entre 4 m et 12 m.
  5. Procédé selon l'une des revendications précédentes, dans lequel un dispositif (300) est utilisé pour la fabrication du profil (110),
    comprenant
    une matrice d'étirage (320) qui présente un contour de denture (325) formant la denture hélicoïdale (120), dans lequel le contour de denture (325) est réalisé avec une hélice et la matrice d'étirage (320) est logée de manière à pouvoir tourner librement.
EP18704962.2A 2017-02-09 2018-02-09 Procédé de fabrication d'engrenages à denture hélicoïdale Active EP3579986B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017001211.3A DE102017001211A1 (de) 2017-02-09 2017-02-09 Verfahren und Vorrichtung zur Herstellung eines schrägverzahnten Metallprofils und Verfahren zur Herstellung schrägverzahnter Zahnräder
PCT/EP2018/053309 WO2018146262A1 (fr) 2017-02-09 2018-02-09 Procédé et dispositif de fabrication d'un profilé métallique à denture hélicoïdale et procédé de fabrication de roues à denture hélicoïdale

Publications (2)

Publication Number Publication Date
EP3579986A1 EP3579986A1 (fr) 2019-12-18
EP3579986B1 true EP3579986B1 (fr) 2020-12-30

Family

ID=61198851

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18704962.2A Active EP3579986B1 (fr) 2017-02-09 2018-02-09 Procédé de fabrication d'engrenages à denture hélicoïdale

Country Status (3)

Country Link
EP (1) EP3579986B1 (fr)
DE (1) DE102017001211A1 (fr)
WO (1) WO2018146262A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11697149B2 (en) 2021-04-23 2023-07-11 Magna Powertrain, Inc. Stamping press forming of outer diameter helical splines
CN114309099A (zh) * 2021-12-23 2022-04-12 延锋国际座椅***有限公司 一种长齿条的制造方法
EP4289526A1 (fr) * 2022-06-09 2023-12-13 FELSS Systems GmbH Procédé de formage et machine de formage permettant de produire une denture oblique d'une pièce cylindrique par extrusion

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191316304A (en) * 1913-07-15 1914-08-17 Charles James Beaver Improvements in Extruding Machines.
US2954121A (en) * 1955-03-14 1960-09-27 Donald O Benson Extrusion of spirally formed article
DE3915969A1 (de) 1989-05-17 1990-11-22 Doege Eckart Verfahren und vorrichtung zum schmieden von schraegverzahnten zahnraedern
JPH04136107A (ja) 1990-09-25 1992-05-11 Sumitomo Electric Ind Ltd 焼結斜歯歯車の成形装置
US6293164B1 (en) * 1999-06-30 2001-09-25 Trw Inc. Rack and pinion steering apparatus and method for manufacturing a helical pinion
DE102010060927A1 (de) 2010-12-01 2012-06-06 Wf-Maschinenbau Und Blechformtechnik Gmbh & Co. Kg Verfahren und Vorrichtung zur Herstellung eines rotationssymmetrischen Getriebeteiles mit einer Innen-Schrägverzahnung
DE102012017525B4 (de) 2011-09-10 2022-04-28 Volkswagen Aktiengesellschaft Verfahren zur umformenden Herstellung eines Zahnrads mit Außenverzahnung, sowie nach diesem Verfahren herstellbares Zahnrad mit Außenverzahnung

Also Published As

Publication number Publication date
DE102017001211A1 (de) 2018-08-09
EP3579986A1 (fr) 2019-12-18
WO2018146262A1 (fr) 2018-08-16

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