EP2148752B1 - Procédé de fabrication d'élément de base d'arbre creux - Google Patents

Procédé de fabrication d'élément de base d'arbre creux Download PDF

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Publication number
EP2148752B1
EP2148752B1 EP08758076A EP08758076A EP2148752B1 EP 2148752 B1 EP2148752 B1 EP 2148752B1 EP 08758076 A EP08758076 A EP 08758076A EP 08758076 A EP08758076 A EP 08758076A EP 2148752 B1 EP2148752 B1 EP 2148752B1
Authority
EP
European Patent Office
Prior art keywords
preform
hollow shaft
fact
forging process
incremental forming
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.)
Not-in-force
Application number
EP08758076A
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German (de)
English (en)
Other versions
EP2148752A1 (fr
Inventor
Matthias Derse
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.)
Neumayer Tekfor Holding GmbH
Original Assignee
Neumayer Tekfor Holding GmbH
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Publication date
Application filed by Neumayer Tekfor Holding GmbH filed Critical Neumayer Tekfor Holding GmbH
Publication of EP2148752A1 publication Critical patent/EP2148752A1/fr
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Publication of EP2148752B1 publication Critical patent/EP2148752B1/fr
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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
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/10—Making machine elements axles or shafts of cylindrical form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/10—Piercing billets
    • 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
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/063—Making machine elements axles or shafts hollow

Definitions

  • EP 1 745 870 A1 discloses a method for producing hollow shaft main bodies, this method being characterized in that in a first step, the outer surface of a cylindrical starting material is machined by forming to obtain at least a predetermined diameter transition in the longitudinal direction of a base body. During this first step, namely by means of a cross wedge rolling process, a hole should also be formed by means of one or two dome. Thereafter, in a further method step, namely by incremental forming, the outer and / or inner surface of the base body is produced.
  • the present invention has for its object to overcome these disadvantages and to ensure a simpler and cheaper production and to further optimize the conservation of resources.
  • expensive developments of tools are to be avoided, furthermore the productivity is to be significantly improved and, moreover, to provide a preform with optimum quality for the subsequent processing steps to be performed.
  • the production of the hole should be made so that for most applications, a reworking of the same is no longer necessary, because in the manufacturing method of the invention described below, holes can be created so that a subsequent alignment of the bore is no longer required because of a dome.
  • the blanks By producing a preform or a blank by a forging process in a multi-stage tool, the blanks can be made in simple tools and also provided with a bore and then serve as a raw material for the next step.
  • the bore can either only partially be introduced into the body or be continuous. Even with continuous drilling only a small amount of waste is present through the appropriately for forging process belonging punching the Butzens.
  • Forging tools By the use of forging tools a particularly favorable mass production is possible.
  • the previously mentioned punching the Butzens can also be done in a separate operation in a tool outside of a forging tool.
  • the forming into a preform can also be done in a forming process, the half-warm or - z. B. depending on the required degree of deformation or application - is carried out cold.
  • the preform thus produced is further reshaped, namely the inner and / or outer surface is reshaped, is suitable in particularly favorable manner the so-called rotary swaging, which may be application or product-related cold or Halbwarmrundkneten.
  • rotary swaging which may be application or product-related cold or Halbwarmrundkneten.
  • the preform during the first step of producing the preform, it is provided with an undercut. This is done by using a pusher tool at one of the forging stages during the forging process which consists of several segments which can be moved onto the body to be forged and which are moved together during the pressing process and moved apart again to eject the part.
  • FIGS. 1 and 2 merely serve to explain sub-steps of the erfindungsgeze ⁇ en method.
  • the preform 1a has a shank portion 2a and a flange portion 3a and a through hole 4a.
  • the shaft region as well as the bore may be cylindrical or conical.
  • the preform 1a is made by a forging process, which is performed in a multi-stage mold.
  • One of the consequences of the bore 4a is introduced to a slug 5.
  • This slug is either punched out in a next station or can be punched out in a tool outside the forging tool.
  • the preform 1a is converted into the hollow shaft main body 1b, in particular incrementally, in particular by swaging, while the flange region 3a can be largely retained and the incremental deformation carried out in the region adjoining the region 3b.
  • a cylindrical or profiled dome can be inserted in sections from the side facing away from the flange region 3a by corresponding preforming of the regions 2b and 2b '.
  • FIG. 2 shows a further form, wherein the upper portion 11 a of FIG. 2 represents the preform and the lower portion in turn the hollow shaft main body 11b.
  • the introduced in the forging process bore 12a extends only partially through the blank 11a, the area generated by incremental forming is denoted by 13.
  • the preform 21a produced by forging is provided with an undercut 22 which, like the blank 21a, is made by forging.
  • the at the bottom of the FIG. 3 illustrated hollow shaft main body 21 b is formed in the region 23 by swaging.
  • the region 23 may be supported by a mandrel during the forming process depending on the desired inner shape.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Claims (7)

  1. Procédé pour la fabrication de corps de base à arbre creux pourvus d'un alésage, comprenant :
    - une première étape au cours de laquelle la surface extérieure d'une matière de base cylindrique est traitée par déformation dans le cadre d'une procédure de forgeage dans un moule à plusieurs niveaux pour obtenir une préforme (1a ; 11 a ; 21 a) qui présente un segment de queue (2a) et un segment de bride (3a), tout en sachant que - dans une des étapes - au minimum un passage diamétral prédéterminé est formé dans le sens longitudinal de la préforme ainsi qu'un alésage (4a ; 12a) s'étirant au moins partiellement sur la longueur, tout en sachant que la préforme - dans une des étapes de forgeage par le biais d'un moule à empreintes mobiles composé de plusieurs segments mobiles sur le corps à forger - est pourvue d'une coupe arrière (22) pendant la première étape, une procédure pendant laquelle les segments sont serrés l'un contre l'autre pendant la procédure de compression,
    tout en sachant que les segments sont écartés pour l'éjection de la préforme, et
    - une deuxième étape au cours de laquelle la préforme (1 a ; 11 a ; 21 a) est transformée par déformation de la surface extérieure et/ou intérieure de la préforme de manière incrémentielle pour former le corps de base à arbre creux (1 b ; 11 b ; 21 b), tout en sachant que le segment de bride (3a) de la préforme est quasiment entièrement conservé et la déformation incrémentielle
    - est réalisée au niveau du segment de la queue (2b ;13 ; 23) adjacent au segment de la bride de la préforme.
  2. Procédé selon la spécification 1, qualifié de telle manière que la deuxième étape est un malaxage circulaire.
  3. Procédé selon une des spécifications 1-2, qualifié de telle manière que la déformation destinée à obtenir une préforme est réalisée dans un état à basse température.
  4. Procédé selon une des spécifications 1-3, qualifié de telle manière que la déformation destinée à obtenir une préforme est réalisée à froid.
  5. Procédé selon une des spécifications précédentes, qualifiée de telle manière que la déformation incrémentielle est réalisée à basse température.
  6. Procédé selon une des spécifications précédentes, qualifiée de telle manière que la déformation incrémentielle est réalisée à froid.
  7. Procédé selon une des spécifications précédentes, qualifiée de telle manière qu'au minimum une des extrémités de l'arbre creux de la préforme est de nouveau fermée suite à la déformation incrémentielle.
EP08758076A 2007-05-26 2008-05-15 Procédé de fabrication d'élément de base d'arbre creux Not-in-force EP2148752B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007024743 2007-05-26
PCT/DE2008/000833 WO2008145092A1 (fr) 2007-05-26 2008-05-15 Procédé de fabrication d'éléments de base d'arbre creux et éléments de base d'arbre creux fabriqués selon ce procédé

Publications (2)

Publication Number Publication Date
EP2148752A1 EP2148752A1 (fr) 2010-02-03
EP2148752B1 true EP2148752B1 (fr) 2012-04-18

Family

ID=39773115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08758076A Not-in-force EP2148752B1 (fr) 2007-05-26 2008-05-15 Procédé de fabrication d'élément de base d'arbre creux

Country Status (4)

Country Link
EP (1) EP2148752B1 (fr)
AT (1) ATE553867T1 (fr)
DE (2) DE102008023696A1 (fr)
WO (1) WO2008145092A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017212989A1 (de) * 2017-07-27 2019-01-31 Volkswagen Aktiengesellschaft Herstellung einer Hohlwelle durch Radialumformen eines kurzen Rohlings

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102319854A (zh) * 2011-08-18 2012-01-18 贵州航天新力铸锻有限责任公司 超临界汽水分离器侧封头的锻制方法
DE102012106585A1 (de) * 2012-07-20 2014-01-23 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung einer Hochdruckkraftstoffleitung
DE102015221842A1 (de) * 2015-11-06 2017-05-11 Volkswagen Aktiengesellschaft Verfahren zur Herstellung einer Getriebewelle
DE102019111048A1 (de) * 2019-04-29 2020-10-29 Volkswagen Aktiengesellschaft Verfahren zum Herstellen einer Hohlwelle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19705279A1 (de) * 1997-02-12 1997-11-20 Daimler Benz Ag Verfahren zum Herstellen von Rohlingen für hohle Getriebewellen
JP2005040842A (ja) * 2003-07-24 2005-02-17 Uk:Kk 中空段付軸の成形方法
DE102006019234A1 (de) * 2005-06-14 2006-12-28 IFUTEC Ingenieurbüro für Umformtechnik GmbH Verfahren zur Umformung eines Massivelements
EP1745870A1 (fr) * 2005-07-22 2007-01-24 Johann Hay GmbH & Co. KG, Automobiltechnik Méthode de fabrication des corps de base des axes creuses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017212989A1 (de) * 2017-07-27 2019-01-31 Volkswagen Aktiengesellschaft Herstellung einer Hohlwelle durch Radialumformen eines kurzen Rohlings

Also Published As

Publication number Publication date
DE112008002036A5 (de) 2010-04-29
DE102008023696A1 (de) 2008-12-24
EP2148752A1 (fr) 2010-02-03
WO2008145092A1 (fr) 2008-12-04
ATE553867T1 (de) 2012-05-15

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