EP1004373B1 - Procédé et dispositif de fluotournage - Google Patents

Procédé et dispositif de fluotournage Download PDF

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Publication number
EP1004373B1
EP1004373B1 EP99122407A EP99122407A EP1004373B1 EP 1004373 B1 EP1004373 B1 EP 1004373B1 EP 99122407 A EP99122407 A EP 99122407A EP 99122407 A EP99122407 A EP 99122407A EP 1004373 B1 EP1004373 B1 EP 1004373B1
Authority
EP
European Patent Office
Prior art keywords
workpiece
area
spacing ring
spinning
spinning mandrel
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
EP99122407A
Other languages
German (de)
English (en)
Other versions
EP1004373A1 (fr
Inventor
Karl-Heinz Köstermeier
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.)
Leico GmbH and Co Werkzeugmaschinenbau
Original Assignee
Leico GmbH and Co Werkzeugmaschinenbau
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 Leico GmbH and Co Werkzeugmaschinenbau filed Critical Leico GmbH and Co Werkzeugmaschinenbau
Publication of EP1004373A1 publication Critical patent/EP1004373A1/fr
Application granted granted Critical
Publication of EP1004373B1 publication Critical patent/EP1004373B1/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
    • 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
    • B21H5/025—Internally geared wheels

Definitions

  • the invention relates to a method for pressure rolling, at an axially symmetrical workpiece at a free end a chuck is clamped with an outer profile, the spinning chuck rotates together with the workpiece and at least one pressure roller is delivered, the workpiece being reshaped and attached to the outer profile of the Spinning chuck is formed.
  • the invention further relates to a device for pressure rolling with a chuck that has an outer profile and on which a workpiece can be clamped, a drive, via which the chuck together with the workpiece is rotatable, and at least one pressure roller for reshaping the workpiece and forming it on the chuck.
  • a generic state of the art goes for example from DE 42 18 092 C2.
  • a disc-shaped starting workpiece is on a chuck with an essentially cylindrical outer contour, and the edge of the workpiece extending in the radial direction is by initially radial and / or axial infeed Pressure roller molded onto the chuck.
  • One can External teeth on the chuck so that an internal toothing is molded into the cup-shaped workpiece becomes.
  • the problem with the known methods and Devices that great by the action of the spinning roller Forces applied to the external teeth of the chuck become. These cause a when forming the toothing high bending and alternating loads on the individual Tool teeth. This can lead to tooth breakage after a relatively short period of time and thus lead to the destruction of the chuck.
  • the invention has for its object to provide a method and a device with which a precise manufacture of workpieces with a inner profile is made possible.
  • the invention builds on the generic method in that a spacer ring made of a deformable material is placed on the chuck at a distance from its free end, that an edge region of a first workpiece is formed on the spacer ring during shaping, that the spacer ring is formed when the edge region is formed of a first workpiece is plastically deformed and thereby work hardened and the deformed and hardened spacer ring remains on the chuck for forming further workpieces.
  • the spacer ring thus adapts to the process of forming Workpiece to the complex play of forces. In doing so, a inexpensive to produce spacer ring almost optimal adapted the outer profile of the chuck.
  • a inexpensive to produce spacer ring almost optimal adapted the outer profile of the chuck.
  • the distance ring is deformed plastically and in Following the forming process, the spacer ring is work hardened and dimensionally stable.
  • the spacer ring can be made from the same Material like the workpiece, whereby a Solidification and a stable final shape of the spacer ring takes place.
  • the method according to the invention is particularly well suited to the workpiece in one on the side surface of the chuck to form the intended external profile.
  • This can, for example, a toothing or a keyway profile be as it is required for a clutch plate carrier becomes.
  • the Forming area of the workpiece in axial and radial Direction brought into the desired shape and still one solidified surface structure in the inner forming area provided.
  • the spacer ring is preferably in a manner on the The chuck is placed on the toothing with a Coverage area partially covered and the coverage area when molding and deforming the workpiece of the spacer ring at least partially in the toothing is molded. In this way, the spacer ring becomes a provides a secure hold on the chuck. Furthermore, the toothing is additionally supported, which increases the tool life noticeably increased.
  • the method is particularly advantageous in that the forming of the workpiece on the side surface an axial Material flow arises that the axial material flow of the end face of the spacer ring is partially braked, that in the radial direction of the external material of the workpiece continues to flow in the axial direction and the spacer ring at least partially overflows and that by that of the radial force component (s) applied the spacer ring is deformed in the radial direction. Consequently becomes the actual outer edge of the finished workpiece through the stop on the front of the spacer ring clearly defined while excess material in flows in the axial direction and thereby on the outside of the spacer ring comes to rest.
  • the end of the spacer ring is preferably concave Wells shaped, being 0.2 to 0.5 mm in axial Direction can expand. Because of this fact Workpiece material molded onto the spacer ring in a way that the end faces of the resulting internal toothing as a reflection of the concave recesses of the spacer ring with a convex or wavy structure.
  • the method is particularly advantageously developed by that the wall thickness is due to the molding Material overflow by further axial feed of the Pressure roller is rolled almost to zero.
  • the wall thickness is due to the molding Material overflow by further axial feed of the Pressure roller is rolled almost to zero.
  • the method according to the invention shows its particular advantages in that after removal of the finished workpiece the process with the same deformed and dimensionally stable Spacer ring for forming another workpiece repeated becomes. This gives workpieces of identical shape and always works on an inner shape, which the through has the ideal contour provided the first forming process.
  • the invention is based on the generic device in that a deformable spacer ring is provided, that the spacer ring can be exchangeably fastened to the spinning chuck and that the spacer ring can be formed and solidified into the outer profile of the spinning chuck when a first workpiece is formed.
  • An overlap area at least partially overlaps the forming area of the workpiece when the workpiece is formed.
  • a pressure plate for Clamping the workpiece on the face of the chuck is arranged opposite.
  • the workpiece can thereby are conveniently absorbed by the spinning chuck, and it can be given sufficient hold to to do justice to the forces that arise.
  • the spinning chuck preferably has a molding area a first diameter and a rear chuck area with a second diameter, the first Diameter is larger than the second diameter.
  • the shaping area of the chuck has an outer profile a gear on. So with the forming process Internal toothing.
  • the spacer ring preferably has an overlap area with a first inner diameter and a rear one Spacer ring area with a second inner diameter, the spacer ring with its overlap area the forming area of the chuck and with its rear Spacer ring area on the rear chuck area sitting. Due to this fact, the spacer ring is defined Assigned position on the chuck. Further the coverage area is a thinned area, so that here the required deformation of the spacer ring can be done in a particularly favorable manner.
  • the Spacer ring at its rear spacer ring area between an edge that acts as a radial undercut between the Forming area and the rear chuck area, and axially clamped the end face of the chuck receptacle is.
  • the spacer ring has thus throughout Process hold a secure hold.
  • the spacer ring has one in a non-deformed state outer diameter essentially constant in the axial direction, which is smaller than the outside diameter of the workpiece, when the workpiece and spacer ring move together for the first time touch. Due to this fact it is possible by axial Feed of the pressure roller material from the radially outer Let the workpiece area flow over the spacer ring, while the material flow in the inner area of the workpiece is braked by the end face of the spacer ring becomes.
  • the spacer ring in its deformed state with its overlap area at least partially molded into the teeth of the chuck and faces one towards the edge of the coverage area tapering, concave outer contour.
  • the spline chuck teeth effectively supported.
  • the pressure rollers are ring-like arranged around the chuck and in a cage each are rotatably mounted. This configuration will transfer the force symmetrically to all rollers, whereby they intervene in the forming process at the same time and evenly load the internal chuck.
  • the invention is based on the surprising finding that by providing an initially deformable Spacer ring a particularly advantageous and precise shape Forming process is possible.
  • the tool with the spacer ring as part of it automatically fits the present one Force play, so that ideal conditions for a forming process available.
  • a deburring of the front Toothed edges are eliminated, so that an almost Completely formed workpiece as a result of the invention Procedure is present.
  • suitable materials and process conditions can be a spacer for manufacturing of around a thousand workpieces. After that the spacer ring can be removed and by a new, not yet deformed spacer ring to be replaced.
  • the same measure, namely providing a spacer ring a support for the teeth of the The chuck achieves what the bending of the teeth significantly reduced and thus the life of the tool chuck elevated.
  • the device is in the upper area shown during an early stage of the procedure the lower area a state at a later date represents.
  • a chuck 2 is in a driven holder 4th held.
  • the chuck 2 has a shaping area 6 and a rear chuck area 8, the rear
  • the chuck area 8 has a smaller diameter than that Forming area 6 has.
  • the molding area 6 has a toothing 10 provided. Because of the different diameters of forming area 6 and rear chuck area 8 results at the transition between the areas (6, 8) a radially extending edge 12.
  • a spacer ring 14 is placed on the chuck 2.
  • the spacer ring 14 has an overlap area 16 and a rear spacer ring area 18.
  • Rear Spacer ring area 18 sits on the rear chuck area 8, while the overlap region 16 the toothing 10 of the forming area 6 of the chuck 2 overlaps.
  • the rear spacer ring area 18 is between the edge 12 and the chuck holder 4 axially clamped, whereby the spacer ring 14 a secure hold is given.
  • the spacer ring 14 has a substantially in axial direction constant outer diameter 20.
  • a Pressure plate 24 clamped a workpiece 26.
  • the workpiece 26 is cup-shaped, with an outer diameter 28, which is larger than the outer diameter 20 of the spacer ring 14.
  • the workpiece 26 can be in the same Clamping can be formed from a round blank.
  • FIG. 2 and 3 is the rounded edge formation on the face of a workpiece 76 and the corresponding Formation of a shaped spacer ring 64 illustrates.
  • a Tooth base 54 and tooth flanks 53 is limited.
  • the radial Molding of a workpiece 53 results from the effects of friction on the tooth base 54 and the tooth flanks 53 in the tooth groove 55 an uneven material flow. The farther the material of the workpiece 76 from the tooth base 54 and the Tooth flanks 53 is removed, the more the material hurries in the axial direction.
  • a radially outside The material area thus first reaches a spacer ring 64, which also corresponds to the forming forces is molded into the tooth grooves 55 of the chuck 52. This creates a radially outer edge Rounding 66. Furthermore, a certain material flow of the Spacer ring 64 in the axial direction on the workpiece 76 too generated. The material of the spacer ring 64 fills the free spaces not yet occupied by workpiece 76 in the tooth groove 55. This means that the spacer ring 64 on Tooth base 54 arches ahead and an toe 65 forms. Accordingly, the material of the spacer ring 64 hurries along the tooth flanks 53 ahead, with a concave Formation 67 trains.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)

Claims (16)

  1. Procédé de fluotournage, dans lequel :
    une pièce (26) à symétrie axiale est serrée sur une extrémité libre d'un mandrin (2) avec un profil extérieur, en particulier une denture (10),
    le mandrin (2) est mis en rotation avec la pièce (26), et
    au moins un galet de fluotournage (34) est approché, la pièce (26) étant déformée et pressée contre le profil extérieur du mandrin (2),
        caractérisé en ce que :
    une bague d'écartement (14) en matériau déformable est rapportée sur le mandrin (2) à distance de son extrémité libre,
    pendant le formage, une zone de bord d'une première pièce (26) est pressée sur la bague d'écartement (14),
    la bague d'écartement (14) est déformée plastiquement lors du formage de la zone de bord de la première pièce (26) et est ainsi écrouie, et
    la bague d'écartement (14) déformée et écrouie reste sur le mandrin (2) pour le formage d'autres pièces (26).
  2. Procédé selon la Revendication 1, caractérisé en ce que la pièce (26) est pressée sur un mandrin (2) avec une denture (10) qui présente des rainures d'extension axiale.
  3. Procédé selon la Revendication 1 ou 2, caractérisé en ce que la bague d'écartement (14) est rapportée de telle manière sur le mandrin (2) qu'elle recouvre au moins partiellement axialement le profil extérieur avec une zone de recouvrement (16) et la zone de recouvrement (16) est enfoncée dans le profil extérieur lors du formage de la pièce (26) et de la déformation de la bague d'écartement (14) et délimite le flux axial de matière lors de la déformation de la pièce (26).
  4. Procédé selon l'une quelconque des Revendications précédentes, caractérisé en ce que le formage de la pièce (26) s'effectue par avance axiale du/des mandrin(s) (34).
  5. Procédé selon l'une quelconque des Revendications précédentes, caractérisé en ce que, lors du formage, la bague d'écartement (14) est conformée du côté frontal avec des renfoncements concaves.
  6. Procédé selon l'une quelconque des Revendications précédentes, caractérisé en ce que plusieurs galets de fluotournage (34) répartis uniformément sur la périphérie de la pièce (26) s'engagent simultanément avec la pièce (26).
  7. Dispositif de fluotournage, avec :
    un mandrin (2) qui présente un profil extérieur et sur lequel une pièce (26) peut être serrée,
    un entraínement par l'intermédiaire duquel le mandrin (2) peut être mis en rotation avec la pièce (26), et
    au moins un galet de fluotournage (34) pour déformer la pièce (26) et la presser contre le mandrin (2),
        caractérisé en ce que :
    une bague d'écartement déformable (14) est prévue,
    la bague d'écartement (14) peut être fixée de manière interchangeable sur le mandrin (2), et
    la bague d'écartement (14) peut être enfoncée et écrouie dans le profil extérieur du mandrin (2) lors du formage d'une première pièce (26).
  8. Dispositif selon la Revendication 7, caractérisé en ce qu 'un disque de pressage (24) est placé à l'opposé de la face frontale (22) du mandrin (2) pour serrer la pièce (26).
  9. Dispositif selon la Revendication 7 ou 8, caractérisé en ce que le mandrin (2) présente une zone avant de formage (6) avec un premier diamètre et une zone arrière (8) de mandrin avec un deuxième diamètre, le premier diamètre étant supérieur au deuxième diamètre.
  10. Dispositif selon la Revendication 9, caractérisé en ce que la zone avant de formage (6) présente le profil extérieur ou une denture (10).
  11. Dispositif selon la Revendication 9 ou 10, caractérisé en ce que la bague d'écartement (14) présente une zone de chevauchement (16) avec un premier diamètre intérieur et une zone de bague d'écartement arrière (18) avec un deuxième diamètre intérieur, la bague d'écartement (14) reposant avec sa zone de chevauchement (16) sur la zone avant de formage (6) du mandrin (2) et avec sa zone de bague d'écartement arrière (18) sur la zone arrière (8) de mandrin.
  12. Dispositif selon la Revendication 11, caractérisé en ce que la bague d'écartement (14) est serré axialement sur une zone de bague d'écartement arrière (18) entre un bord (12), présent sous forme de contre-dépouille radiale entre la zone de formage (6) et la zone de mandrin arrière (8), et la surface frontale d'un logement (4) de mandrin.
  13. Dispositif selon l'une quelconque des Revendications 7 à 12, caractérisé en ce que la bague d'écartement (14) possède dans un état non déformé un diamètre extérieur (20) pour l'essentiel constant dans la direction axiale, qui est inférieur au diamètre extérieur (28) de la pièce (26), quand la pièce et la bague d'écartement se touchent pour la première fois.
  14. Dispositif selon l'une quelconque des Revendications 9 à 12, caractérisé en ce que, dans son état déformé, la bague d'écartement (14) est au moins partiellement enfoncée avec sa zone de chevauchement (16) dans la denture du mandrin et présente un contour extérieur concave s'effilant en direction de la zone de chevauchement (16).
  15. Dispositif selon l'une quelconque des Revendications 7 à 14, caractérisé en ce que plusieurs galets de fluotournage (34, 34') sont prévus.
  16. Dispositif selon la Revendication 15, caractérisé en ce que les galets de fluotournage (34, 34') sont disposés en anneau autour du mandrin (2) et sont montés rotatifs dans une cage.
EP99122407A 1998-11-25 1999-11-10 Procédé et dispositif de fluotournage Expired - Lifetime EP1004373B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19854481A DE19854481C2 (de) 1998-11-25 1998-11-25 Verfahren und Vorrichtung zum Drückwalzen
DE19854481 1998-11-25

Publications (2)

Publication Number Publication Date
EP1004373A1 EP1004373A1 (fr) 2000-05-31
EP1004373B1 true EP1004373B1 (fr) 2002-10-02

Family

ID=7889045

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99122407A Expired - Lifetime EP1004373B1 (fr) 1998-11-25 1999-11-10 Procédé et dispositif de fluotournage

Country Status (4)

Country Link
US (1) US6205832B1 (fr)
EP (1) EP1004373B1 (fr)
CA (1) CA2290294A1 (fr)
DE (2) DE19854481C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2127777A1 (fr) 2008-05-26 2009-12-02 Repkon Machine and Tool Industry & Trade Ltd. Dispositif et procédé de fabrication ou de traitement de pièces à usiner à partir d'une ébauche, en particulier pour former des profils internes ou des dentures intérieures

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US6731043B2 (en) * 2001-10-22 2004-05-04 A. J. Rose Manufacturing Co. One-piece field core shell
JP4069735B2 (ja) * 2002-02-21 2008-04-02 株式会社ジェイテクト 内歯車の成形方法
US20060205560A1 (en) * 2005-03-10 2006-09-14 Transform Automotive Llc Transmission unitary shell output carrier and ring gear
DE102005056628A1 (de) * 2005-11-25 2007-06-06 Eska Flowform Gmbh Hohlwelle aus einem metallischen Werkstoff und Verfahren zum Herstellen einer derartigen Hohlwelle
US8042370B2 (en) * 2006-02-07 2011-10-25 Ronjo, Llc Flow formed gear
WO2010012457A1 (fr) * 2008-07-29 2010-02-04 Repkon Machine And Tool Industry & Trade Ltd. Dispositif et procédé de fabrication ou d'usinage de pièces à partir d'une préforme, en particulier pour le formage de profilés intérieurs ou de dentures intérieures
US8162812B2 (en) * 2009-03-12 2012-04-24 Icecure Medical Ltd. Combined cryotherapy and brachytherapy device and method
DE102010012698B4 (de) 2010-03-24 2020-07-16 Ssb-Maschinenbau Gmbh Vorrichtung für die Umformung von Leichtmetallfelgen
RU2523645C2 (ru) * 2012-11-07 2014-07-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный исследовательский Томский политехнический университет" Устройство для раскатки и отбортовки полых изделий
RU2704342C1 (ru) * 2018-11-27 2019-10-28 Общество с ограниченной ответственностью "Газпром добыча Уренгой" Устройство для выполнения двойной п-образной отбортовки на заготовках круглой формы

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
CH670970A5 (fr) * 1986-09-18 1989-07-31 Grob Ernst Fa
DE4218092C1 (en) * 1992-05-07 1993-06-24 Wf-Maschinenbau Und Blechformtechnik Gmbh & Co Kg, 4415 Sendenhorst, De Mfg. gear part - involves using circular cylindrical part with inner toothing only on part of its length, non-toothed part being for seals
CA2103928C (fr) * 1993-01-05 1997-12-16 Helmut Arnold Hardow Wodrich Organe de transmission du couple et methode de fabrication
EP0736347A1 (fr) * 1995-04-06 1996-10-09 Samtech Corporation Procédé pour la fabrication d'un élément de transmission denté
DE19545890C2 (de) * 1995-12-08 1998-12-17 Leifeld Gmbh & Co Verfahren zur Herstellung eines Werkstücks mit Nabe und Drück- oder Drückwalzmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2127777A1 (fr) 2008-05-26 2009-12-02 Repkon Machine and Tool Industry & Trade Ltd. Dispositif et procédé de fabrication ou de traitement de pièces à usiner à partir d'une ébauche, en particulier pour former des profils internes ou des dentures intérieures

Also Published As

Publication number Publication date
DE59902916D1 (de) 2002-11-07
CA2290294A1 (fr) 2000-05-25
EP1004373A1 (fr) 2000-05-31
US6205832B1 (en) 2001-03-27
DE19854481A1 (de) 1999-12-23
DE19854481C2 (de) 2002-06-20

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