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EP0555631B1 - Procédé de fabrication d'élément de transmission à denture externe - Google Patents

Procédé de fabrication d'élément de transmission à denture externe Download PDF

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Publication number
EP0555631B1
EP0555631B1 EP19930100136 EP93100136A EP0555631B1 EP 0555631 B1 EP0555631 B1 EP 0555631B1 EP 19930100136 EP19930100136 EP 19930100136 EP 93100136 A EP93100136 A EP 93100136A EP 0555631 B1 EP0555631 B1 EP 0555631B1
Authority
EP
European Patent Office
Prior art keywords
toothed
tool
roller
curl
chain
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.)
Expired - Lifetime
Application number
EP19930100136
Other languages
German (de)
English (en)
Other versions
EP0555631A1 (fr
EP0555631B2 (fr
Inventor
Udo Friese
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.)
WF Maschinenbau und Blechformtecknik GmbH and Co KG
Original Assignee
WF Maschinenbau und Blechformtecknik GmbH and Co KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25911806&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0555631(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE4205711A external-priority patent/DE4205711C3/de
Application filed by WF Maschinenbau und Blechformtecknik GmbH and Co KG filed Critical WF Maschinenbau und Blechformtecknik GmbH and Co KG
Publication of EP0555631A1 publication Critical patent/EP0555631A1/fr
Publication of EP0555631B1 publication Critical patent/EP0555631B1/fr
Application granted granted Critical
Publication of EP0555631B2 publication Critical patent/EP0555631B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/26—Making other particular articles wheels or the like
    • B21D53/28—Making other particular articles wheels or the like gear wheels
    • 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

Definitions

  • the invention relates to a method for producing an externally toothed gear part according to the preamble of claim 1 and to an apparatus for performing the method.
  • Gear parts with external teeth are widely used, for example, as flywheels for manual transmissions or starters in motor vehicle construction. So far, such transmission parts were either made by z. B. the flywheels were formed in two parts. The flywheel washer was made from cold-formed sheet metal and the external teeth were formed in a separate ring by means of machining. The ring was then welded to the flywheel disc. This known arrangement has the disadvantage that it is expensive and that material changes due to the welding process entered in the flywheel that cannot be fully surveyed.
  • the external toothing is formed from an edge area of the same that is thickened relative to the sheet metal blank before it is formed, such that the cross section of the external toothing is larger than the cross section of a correspondingly long ring zone with the sheet thickness of the sheet metal blank.
  • the relevant edge area is thickened by means of suitable sheet metal forming methods, such as compression or the like, before the external toothing is formed, as a result of which structural changes are entered into the material. Since carbon steel is usually used for these gear parts, an inevitable hardening occurs, which is disadvantageous for the subsequent machining process.
  • the teeth are then formed by hammering in the teeth according to a method which also belongs to the prior art. This second-mentioned procedure has the further disadvantage that it can always happen that the tooth flanks are not sufficiently load-bearing, so that teeth can break under high loads.
  • the known arrangement has the disadvantage that the teeth are not only formed on the outside of the edge region of the circular blank, but also a tooth-like corrugation of this peripheral region to the interior of the circular blank, so that this results in circulation the wheel generates a considerable amount of noise.
  • a flywheel which consists of a pressed part, i.e. H. a preference is produced, wherein the teeth provided on the outside of an axially extending part are produced by rolling.
  • the drawing shows this component as if the inner ring of the teeth is smooth.
  • This method has the disadvantage that it is assumed that the wall thickness of the axially extending cylindrical region corresponds exactly to the wall thickness of the hub surface, so that either the base of the ring gear is too thin and too weak, so that the teeth break can, or the hub surface is too thick, so that there is a waste of material and an undesirable increase in weight.
  • a method for producing a gear wheel in which the toothed roller rotates around an axis which stands in the circumferential direction of the workpiece to be machined and in which the shaping work is broken down into a large number of individual shaping steps, i. H. the teeth are hammered into the edge of the workpiece so that structural damage occurs, i. H. the fiber grain of the metal is destroyed and breaks can occur later.
  • This known method therefore essentially requires five consecutive, absolutely necessary essential processing steps, the forces to be used for the collapse being considerable, so that large mechanical expenditure is required.
  • the invention has for its object to provide a method with which, starting from a round blank without material hardening, a thickening of the edge region of the round blank is achieved when producing the teeth.
  • a border is provided in the edge region of the round blank, ie a simple bending over of the round region intended for this purpose, so that no structural changes occur.
  • the teeth are then pressed into this flattened area of the starting component via a form roller designed as a toothed roller, a change in the structure of the material of the starting component only occurring at this time.
  • a device for the manufacture of such a transmission part, which is essentially characterized in that two synchronously driven shafts are provided, one shaft carrying the receiving spindle for the tool and the attachment and the other shaft the form roller, whereby these two shafts are synchronized by a chain drive.
  • This makes it possible to use only one drive motor, and previous attempts to achieve synchronous running between a tool and a form roller by means of an electronic circuit have not been successful with the high forces that occur here.
  • the deflection and tensioning rollers can also be adjusted in position on the slide by means of adjusting screws, so that this makes it possible to adjust the individual deflection and tensioning rollers by means of the adjusting screws, which gives the possibility of precisely aligning the toothed roller to the tool. In other words, it is achieved that the sprocket regardless of Can adjust the slide and its position independently of the tool and thus align it with the tool.
  • a metal blank is shown at 1, which is fixed between a tool 2 and a front 3.
  • the tool has a receiving space 7.
  • a bordering roller 4 which has a central rounded area and two counter-holder disks 4a and 4b attached to it.
  • the bordering roller 4 has moved towards the tool part and in the process has bordered the metal blank 1, so that the bordering 6 has been created.
  • the bordering roller 4 is replaced by a toothed roller 5, which functions as a shaping roller and has a central region which has teeth on its outer circumference, a receiving space 8 being additionally created by the counter-holding discs 5a and 5b.
  • a tooth 9 of the toothed roller 5 can be seen in FIG. 3.
  • 12 denotes the hub surface of a starter gear, this hub surface having a thickness a .
  • the ring gear in this component is formed by the teeth 10 and the continuous base 11, the thickness of the base 11 corresponding at least to the thickness of the hub surface 12.
  • Fig. 6 shows Fig. 3 corresponding to an output part, for example a metal blank, the border is not semicircular as shown in Fig. 3, but is only slightly bent, so then the same result is achieved when the sprocket shown in Fig. 4 is activated as shown in Fig. 4.
  • the starting product required for producing the transmission part according to FIG. 5 is a preference 16
  • this preference 16 in addition to a border 17 has a flange 18 which extends in the axial direction of the hub surface and which can later be provided with so-called transmitter holes if this transmission part is used in motor vehicle construction in the area of the starter.
  • the preference 16 must be pressed and then this component has to be reclamped and clamped onto a molding machine, the great advantage is nevertheless achieved that the required flange 18 for receiving the transmitter holes can be made in one piece with the hub surface of the gear part.
  • the ring gear is formed by infeed of a toothed roller 20, the border 17 then being pressed into the receiving space 1a of the tool and 8a of the toothed roller 20.
  • a device is shown schematically, in which a shaft 22 can be seen, which carries the receiving spindle for the tool in its upper region.
  • the shaft 22 carries a sprocket 23 in the lower region.
  • a carriage 21 can be seen which carries a shaft 24 which carries the toothed roller in its upper area, while a chain wheel 25 can be seen in the lower area.
  • the two sprockets 23 and 25 are connected to one another by a chain 26 which is guided, inter alia, by deflection and tensioning rollers 27 and 28 which are rotatably mounted on a carriage 29.
  • This carriage 29 can advance and over a hydraulic piston-cylinder arrangement and are moved back, with a corresponding movement of the slide 21, which can be adjusted by means of a mechanical device, not shown, a corresponding re-tensioning of the chain 26 by the hydraulic piston-cylinder arrangement 30.
  • the two shafts 22 and 24 can be driven by a motor and absolute synchronous operation is achieved despite the high pressures that occur.

Landscapes

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

Claims (5)

  1. Procédé de fabrication d'un élément de transmission à denture externe à partir d'un flan métallique (1) comprenant une surface de moyeu (12) et une couronne dentée périphérique formée d'une couronne de pied (11) et de dents (10) qui en dépassent vers l'extérieur, laquelle couronne dentée s'étend sensiblement perpendiculairement à la surface de moyeu (12), le flan métallique (1) étant bordé au niveau de sa circonférence, et la bordure (6, 17) étant aplatie dans un logement (7) d'un outil (2) et étant munie de dents (10), caractérisé en ce que la bordure (6, 17) est aplatie, c'est-à-dire formée sans copeaux, avec formation simultanée des dents (10) dans un logement (8) d'un rouleau à dents (5).
  2. Procédé selon la revendication 1, caractérisé en ce qu'à partir du flan métallique, il est fabriqué une ébauche (16) pourvue d'une bordure (17) et d'une bride (18) s'y raccordant et s'étendant sensiblement perpendiculairement à la surface de moyeu (12).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la bordure (6, 17) est réalisé au moyen d'un rouleau de formage conformé en rouleau à dents (5, 20).
  4. Dispositif de fabrication d'un élément de transmission à denture externe, dans lequel le profilage est effectué par pression après approche d'au moins un rouleau à dents, au moyen de celui-ci, avec aplatissement simultané d'une bordure, un outil (2, 2a) étant monté fixe sur une broche de montage, le rouleau à dents (5, 20) étant placé sur un chariot (21) qui peut être déplacé en direction de l'outil (2), la broche de montage qui supporte l'outil portant une roue à chaîne (23) et l'arbre (24) qui entraîne le rouleau à dents (5, 20), avec interposition d'un boîtier à engrenages dans le même sens de rotation que l'outil portant une roue à chaîne (25), étant reliés l'un à l'autre par l'intermédiaire d'une chaîne (26), deux rouleaux de renvoi et de tension (27, 28) montés sur un chariot (29) étant intercalés sur cette chaîne et étant réglables, par l'intermédiaire d'un dispositif hydraulique (30) à piston et cylindre, par rapport au chariot (21) portant l'arbre (24), et agissant en tant que tendeurs de chaîne.
  5. Dispositif selon la revendication 4, caractérisé par des vis de réglage (31, 32) permettant un réglage des rouleaux de tension (27, 28).
EP19930100136 1992-02-13 1993-01-07 Procédé de fabrication d'élément de transmission à denture externe Expired - Lifetime EP0555631B2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4204248 1992-02-13
DE4204248 1992-02-13
DE4205711 1992-02-25
DE4205711A DE4205711C3 (de) 1992-02-13 1992-02-25 Vorrichtung zur Herstellung eines außen verzahnten Getriebeteiles

Publications (3)

Publication Number Publication Date
EP0555631A1 EP0555631A1 (fr) 1993-08-18
EP0555631B1 true EP0555631B1 (fr) 1996-04-03
EP0555631B2 EP0555631B2 (fr) 1998-12-23

Family

ID=25911806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930100136 Expired - Lifetime EP0555631B2 (fr) 1992-02-13 1993-01-07 Procédé de fabrication d'élément de transmission à denture externe

Country Status (4)

Country Link
EP (1) EP0555631B2 (fr)
CA (1) CA2086043C (fr)
DE (1) DE4244720A1 (fr)
ES (1) ES2086139T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19850740A1 (de) * 1998-09-09 2000-03-23 Wf Maschinenbau Blechformtech Verfahren zur Herstellung eines Getriebeteiles im Drückverfahren

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0966330A (ja) * 1995-08-31 1997-03-11 Fuji Kiko Co Ltd 円板外周部の増肉方法及び外周に伝導部を有する円板部材の成形方法
US6161409A (en) * 1996-08-14 2000-12-19 Wf-Maschinebau Und Blechformtechnik Gmbh & Co. Kommanditgessellschaft Process and device for manufacturing a gear part with outer teeth
DE102005043498A1 (de) * 2005-09-12 2007-03-15 Rollwalztechnik Abele + Höltich GmbH Vorrichtung zum Bearbeiten eines Werkstückes
CN106001230A (zh) * 2016-05-31 2016-10-12 安徽赛爵机械制造有限公司 一种复合减震器用带轮的成形工艺

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436801A (en) * 1966-06-23 1969-04-08 Pig Design Corp Method of making geared pulley to eliminate burrs in pulley groove and to facilitate entry of belt into pulley
DE2439690A1 (de) * 1974-08-19 1976-03-04 Emil Siegwart Verfahren zum herstellen von zahnraedern, zahnsegmenten oder dergleichen aus metallblech sowie vorrichtung zur durchfuehrung des verfahrens
CA1094356A (fr) * 1977-02-04 1981-01-27 Drive Manufacturing Inc. Methode de fabrication de poulies et la poulie ainsi obtenue
EP0397901B1 (fr) * 1989-05-17 1993-08-25 Leifeld GmbH & Co. Procédé de fabrication d'une poulie pour courroie
DE3932823C1 (en) * 1989-09-30 1990-12-06 Wf-Maschinenbau Und Blechformtechnik Gmbh & Co Kg, 4415 Sendenhorst, De Toothed transmission component mfr. - involves tool with external teeth forming inside teeth on workpiece
DE4205711C3 (de) * 1992-02-13 2000-02-24 Wf Maschinenbau Blechformtech Vorrichtung zur Herstellung eines außen verzahnten Getriebeteiles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19850740A1 (de) * 1998-09-09 2000-03-23 Wf Maschinenbau Blechformtech Verfahren zur Herstellung eines Getriebeteiles im Drückverfahren

Also Published As

Publication number Publication date
CA2086043C (fr) 2004-12-28
ES2086139T3 (es) 1996-06-16
DE4244720A1 (de) 1994-03-03
CA2086043A1 (fr) 1993-08-14
EP0555631A1 (fr) 1993-08-18
EP0555631B2 (fr) 1998-12-23

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