EP2525926A1 - Method for producing a rotationally symmetrical drive part and drive part - Google Patents

Method for producing a rotationally symmetrical drive part and drive part

Info

Publication number
EP2525926A1
EP2525926A1 EP10740687A EP10740687A EP2525926A1 EP 2525926 A1 EP2525926 A1 EP 2525926A1 EP 10740687 A EP10740687 A EP 10740687A EP 10740687 A EP10740687 A EP 10740687A EP 2525926 A1 EP2525926 A1 EP 2525926A1
Authority
EP
European Patent Office
Prior art keywords
flange
produced
pressing
drive part
thickness
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
EP10740687A
Other languages
German (de)
French (fr)
Other versions
EP2525926B1 (en
Inventor
Udo Friese
Heiko Ohlscher
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
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Application filed by WF Maschinenbau und Blechformtecknik GmbH and Co KG filed Critical WF Maschinenbau und Blechformtecknik GmbH and Co KG
Publication of EP2525926A1 publication Critical patent/EP2525926A1/en
Application granted granted Critical
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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

Definitions

  • the invention relates to a method for producing a rotationally symmetrical gear part according to the preamble of claim 1 and to a gear part produced according to the method
  • Such gear parts find use in different fields of application, for example as starter rings in motor vehicles.
  • the Ronde is deformed by material thickening on the outer edge by means of one or more spinning roller, with a simultaneous change in thickness of the blank.
  • the invention has for its object to further develop a method of the generic type so that a simpler and more cost-effective production with improved product quality is possible.
  • the annular blank which forms the semifinished product can consist of a welded flat iron, a pipe section, a forged or ring-coarse precursor whose wall thickness substantially corresponds to the thickness of the casing part of the finished gear part in which Hersgnac a starter ring, an external toothing is introduced.
  • the flange to be formed according to the invention adjoins the shell part and is preferably pressed or deformed radially inwards by pressing by means of at least one spinning roller, starting from the thickness of the molded part, with wall thinning.
  • the formation of the flange can be performed in several steps, for example, first by molding a frustoconical contour on the ring-shaped blank by means of a pressing tool, and then pressing. forming / forming in the direction of the central axis of the transmission part by means of the spinning roller, with simultaneous dilution of the Flanschwandung.
  • different wall thicknesses can be formed over the contour of the flange, which run continuously in the sense of a wedge or stepped. It is also conceivable to form a hub in the center of the flange by pressing / forming. Furthermore, the final contour can be produced by a pressing tool, in particular in the case of a very complex envelope contour.
  • different wall thicknesses of the flange can also be produced with the help of the pressure roller, depending on the delivery of the pressure roller in the axial as well as in the radial direction of the transmission part, so that different thicknesses and contours of the flange can be produced without difficulty.
  • FIG. 1 shows an annular blank 1 which is deformed into a rotationally symmetrical gear part 2, in particular a starter ring, as can be seen schematically in FIG. 4 as a finished product.
  • This blank 1 is held in a tool chuck 7 (FIG. 2) of a device for carrying out the method with a section which forms a casing part 3 in the finished product (FIG. 4), while another part protrudes beyond the tool chuck 7, from which then a radially extending flange 4 is formed.
  • the pressing tool 5 is pressed axially against the cylindrical, projecting portion of the blank 1.
  • the flange 4 is formed by means of a radially and axially deliverable spinning roller 6, which extends radially to the central axis, at right angles to the jacket part 3.
  • the outside of the casing part 3 can be provided with, for example, an external toothing.
  • the precursor present as a semifinished product is set in rotation in accordance with FIG. 2, while the freely rotating pusher roller 6 is delivered radially and axially.
  • a concentric, axially oriented hub can also be molded onto the flange 4, likewise by pressing.

Landscapes

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

Abstract

The invention relates to a method for producing a one-piece rotationally symmetrical drive part, in particular a starter ring, comprising an outer-side casing part (3), which is adjoined by an angled flange (4) that has a different thickness than said casing part and is aligned with respect to the central axis, wherein said method is designed such that the flange (4) is derived by forming of a circumferential section of an annular blank (1).

Description

Verfahren zur Herstellung eines rotationssymmetrischen Getriebeteiles sowie Getriebeteil Die Erfindung betrifft ein Verfahren zur Herstellung eines rotationssymmetrischen Getriebeteiles gemäß dem Oberbegriff des Anspruchs 1 sowie ein nach dem Verfahren hergestelltes GetriebeteiL  The invention relates to a method for producing a rotationally symmetrical gear part according to the preamble of claim 1 and to a gear part produced according to the method
Derartige Getriebeteile finden in unterschiedlichen Anwendungsbereichen Ver- wendung, beispielsweise als Starterkränze in Kraftfahrzeugen. Such gear parts find use in different fields of application, for example as starter rings in motor vehicles.
Dabei weist ein solcher Starterkranz einen umlaufenden, mit axial ausgerichteten Zähnen versehenen Zahnkranz auf, an den sich ein radial zur Mittelachse hin erstreckender Flansch anschließt. Die bislang eingesetzten Starterkränze sind ent- weder einstückig aus einer Ronde oder durch Anschweißen des separat gefertigten Zahnkranzes am ebenfalls separaten Flansch, hergesteilt. In this case, such a starter ring on a circumferential, provided with axially aligned teeth gear ring, to which a radially extending to the central axis extending flange connects. The starter rings used hitherto have either been produced in one piece from a round blank or by welding the separately manufactured toothed ring on the likewise separate flange.
Aus der EP 1 697 066 81 ist ein Verfahren zur Herstellung eines solchen Getriebeteiles bekannt, das aus einer Biechronde als Halbzeug im Drückverfahren her- gestellt ist, bei dem die erforderliche Formgebung durch Drücken/Umformen des Materials erfolgt. From EP 1 697 066 81 a method for the production of such a gear part is known, which is made of a bending blank as a semi-finished product in the pressing process, in which the required shaping by pressing / forming of the material takes place.
Zur Herstellung des umfänglichen, den Randbereich des Getriebeteiles bildenden Mantelteiies, in das nachfolgend die axial ausgerichteten Zähne zur Bildung des Zahnkranzes eingebracht werden, wird die Ronde durch Materialverdickung am Außenrand mittels einer oder mehrerer Drückrolle verformt, unter gleichzeitiger Dickenveränderung der Ronde. To produce the circumferential, the edge region of the gear member forming sheathed eggs, in the subsequently introduced the axially aligned teeth to form the ring gear, the Ronde is deformed by material thickening on the outer edge by means of one or more spinning roller, with a simultaneous change in thickness of the blank.
Allerdings ist das bekannte Verfahren mit einigen Nachteilen behaftet, die einer optimalen Fertigung entgegenstehen. However, the known method has some disadvantages that preclude optimal production.
Hierzu zählt u.a. der bei der Herstellung der Ronde als Halbzeug anfallende Verschnitt durch das Ausschneiden der Ronde aus einer Blechtafel und das Einbringen einer Mittenöffnung. Da solche Getriebeteile als Massenprodukte in Serien- fertigung hergestellt werden, kommt der Optimierung des Materialverbrauchs eine ebenso hohe Bedeutung zu wie einer Optimierung der Fertigung selbst. Bei einem Einsatz der genannten Ronde muss das außenseitige Manteltei! durch eine Randverdickung hergestellt werden, wozu im Drückverfahren mittels Kaltverformung Material aus der Ronde in den äußeren Randbereich gedrückt wird. This includes, inter alia, the waste produced as a semi-finished product in the production of the blank by cutting the blank from a metal sheet and inserting a central opening. Since such gear parts are mass-produced in mass production, optimization of material consumption is just as important as optimization of the production itself. When using the above blank, the outside jacket must! are produced by an edge thickening, for which purpose in the pressing method by cold deformation material from the blank is pressed into the outer edge region.
Alierdings ist dies sowohl hinsichtlich der Fertigungskosten, resultierend aus den Bearbeitungszeiten, wie auch hinsichtlich der erforderlichen Fertigungsqualität unbefriedigend, da es im letzteren Fall am jnnenumfang des Mantelteiies zu Falten- und/oder Rissbildungen kommen kann, mit der Folge einer entsprechenden Ausschussquote, die sich naturgemäß ungünstig auf die Kostenstruktur auswirkt. However, this is unsatisfactory both in terms of manufacturing costs, resulting from the processing times, as well as in terms of the required manufacturing quality, as it may come in the latter case on the inner circumference of the sheathed creases to wrinkles and / or cracking, with the result of a corresponding reject rate, which naturally unfavorable to the cost structure.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der gattungsgemäßen Art so weiterzuentwickeln, dass eine einfachere und kostengünstigere Herstellung bei verbesserter Produktqualität möglich ist. The invention has for its object to further develop a method of the generic type so that a simpler and more cost-effective production with improved product quality is possible.
Diese Aufgabe wird durch ein Verfahren mit den Merkmalen des Anspruchs 1 gelöst. This object is achieved by a method having the features of claim 1.
Der ringförmige Rohling, der das Halbzeug, also das Ausgangsprodukt für das herzustellende Getriebeteäl bildet, kann aus einem geschweißten Flacheisen, einem Rohrabschnitt, einem geschmiedeten oder ringgewaizten Vorprodukt bestehen, dessen Wanddicke im Wesentlichen der Dicke des Mantelteiles des fertigen Getriebeteiles entspricht, in das, bei Hersteilung eines Starterkranzes, eine Außenverzahnung eingebracht wird. The annular blank which forms the semifinished product, that is to say the starting product for the gearbox part to be produced, can consist of a welded flat iron, a pipe section, a forged or ring-coarse precursor whose wall thickness substantially corresponds to the thickness of the casing part of the finished gear part in which Hersteilung a starter ring, an external toothing is introduced.
Bei Einsatz eines geschweißten Ringes erfolgt zunächst eine Kalibrierung des Rohlings, um eine ausreichende Rundheit zu erreichen. When using a welded ring, a calibration of the blank is first carried out in order to achieve a sufficient roundness.
Der erfindungsgemäß anzuformende Flansch schließt sich an das Mantelteil an und wird bevorzugt durch Drücken mittels mindestens einer Drückrolle, ausgehend von der Dicke des Manteiteiles, radial nach innen gedrückt bzw. umgeformt, unter Wandverdünnung. The flange to be formed according to the invention adjoins the shell part and is preferably pressed or deformed radially inwards by pressing by means of at least one spinning roller, starting from the thickness of the molded part, with wall thinning.
Dabei kann die Anformung des Flansches in mehreren Arbeitsschritten erfo!gen, z.B. zunächst durch Anformen einer kegelstumpfförmägen Kontur an den ring- förmingen Rohling mittels eines Presswerkzeugs, und anschließendes Drü- cken/Umformen in Richtung der Mittelachse des Getriebeteiles mittels der Drückrolle, bei gleichzeitiger Verdünnung der Flanschwandung. In this case, the formation of the flange can be performed in several steps, for example, first by molding a frustoconical contour on the ring-shaped blank by means of a pressing tool, and then pressing. forming / forming in the direction of the central axis of the transmission part by means of the spinning roller, with simultaneous dilution of the Flanschwandung.
Je nach Bedarf können unterschiedliche Wanddicken über die Kontur des Flan- sches ausgebildet werden, die kontinuierlich im Sinne eines Keiles oder abgestuft verlaufen. Denkbar ist auch, durch das Drücken/Umformen eine Nabe im Zentrum des Flansches anzuformen. Ferner kann, insbesondere bei einer sehr komplexen Fianschkontur, die endgültige Kontur durch ein Presswerkzeug hergestellt werden. Depending on requirements, different wall thicknesses can be formed over the contour of the flange, which run continuously in the sense of a wedge or stepped. It is also conceivable to form a hub in the center of the flange by pressing / forming. Furthermore, the final contour can be produced by a pressing tool, in particular in the case of a very complex envelope contour.
Grundsätzlich besteht auch die Möglichkeit, auf die Anformung der kegelstumpf- förmigen Kontur an den ringförmingen Rohling durch das Presswerkzeug zu verzichten und stattdessen direkt mit mindestens einer Drückrolie den Flansch auszubilden. In principle, it is also possible to dispense with the molding of the truncated cone-shaped contour of the annular blank by the pressing tool and instead form directly with at least one Drückrolie the flange.
Mithilfe der Drückrolle können im Übrigen auch unterschiedliche Wanddicken des Flansches hergestellt werden, je nach Zustellung der Drückrolie sowohl in axialer wie auch in radialer Richtung des Getriebeteiles, so dass unterschiedliche Dicken und Konturen des Flansches problemlos herstellbar sind. By the way, different wall thicknesses of the flange can also be produced with the help of the pressure roller, depending on the delivery of the pressure roller in the axial as well as in the radial direction of the transmission part, so that different thicknesses and contours of the flange can be produced without difficulty.
Da als Rohling ein im Wesentlichen zylindrisches Formteii eingesetzt wird, gegenüber dem Stand der Technik, bei dem eine Ronde zum Einsatz kommt, erfolgt die Fertigung quasi abfallfrei, wodurch sich naturgemäß erhebliche Kostenvorteile ergeben, insbesondere deshalb, weil solche Getriebeteiie, wie erwähnt, als Se- rienartikel in großen Stückzahlen hergestellt werden. Since a substantially cylindrical Formteii is used as a blank, compared to the prior art, in which a Ronde is used, the production is virtually waste, resulting naturally considerable cost advantages, especially because such Getriebeeteiie, as mentioned, as Se - Rienartikel be produced in large numbers.
Da eine Randverdickung zur Herstellung des Manteiteiles nun nicht mehr erforderlich ist, da das Manteiteil in seiner Dicke der Dicke des Ausgangsmaterials entspricht, werden auch die beschriebenen Nachteile der Falten- und/oder Riss- bildung bei einer Verdickung des Mantelteiles vermieden, wodurch sich eine Reduzierung der Ausschussquote und damit einhergehend eine Optimierung der Herstellungskosten ergibt. Since an edge thickening for the production of the Manteiteiles now no longer required because the Manteiteil corresponds in thickness to the thickness of the starting material, the described disadvantages of wrinkling and / or crack formation are avoided in a thickening of the shell part, resulting in a reduction the reject rate and, consequently, an optimization of the production costs.
Weitere vorteilhafte Ausbildungen der Erfindung sind in den Unteransprüchen ge- kennzeichnet. Das erfindungsgemäße Verfahren wird nachfolgend anhand der beigefügten Zeichnungen nochmals beschrieben. Further advantageous embodiments of the invention are characterized in the subclaims. The inventive method will be described again with reference to the accompanying drawings.
Es zeigen: Show it:
Figuren 1 -4 unterschiedliche Verfahrensschritte, jeweils in einer geschnittenen Seitenansicht einer Vorrichtung zur Durchführung des Verfahrens sowie eines Getriebeteiles. in der Figur 1 ist ein ringförmiger Rohling 1 erkennbar, der zu einem rotationssymmetrischen Getriebeteil 2, insbesondere einem Starterkranz, verformt wird, wie er in der Figur 4 als Fertigprodukt schematisch dargestellt erkennbar ist. Figures 1 -4 different process steps, each in a sectional side view of an apparatus for performing the method and a transmission part. FIG. 1 shows an annular blank 1 which is deformed into a rotationally symmetrical gear part 2, in particular a starter ring, as can be seen schematically in FIG. 4 as a finished product.
Dieser Rohling 1 ist in ein Werkzeugfutter 7 (Figur 2) einer Vorrichtung zur Durch- führung des Verfahrens mit einem Abschnitt, der beim Fertigprodukt (Figur 4) ein Mantelteil 3 bildet, gehalten, während ein anderer Teil über das Werkzeugfutter 7 vorsteht, aus dem dann ein radial verlaufender Flansch 4 gebildet wird. This blank 1 is held in a tool chuck 7 (FIG. 2) of a device for carrying out the method with a section which forms a casing part 3 in the finished product (FIG. 4), while another part protrudes beyond the tool chuck 7, from which then a radially extending flange 4 is formed.
Eine Vorverformung des Getriebeteües 2 erfolgt mittels eines Presswerkzeuges 5, mit dem der aus dem Werkzeugfutter 7 hervorstehende Teil des Rohlings 1 zunächst zu einem Konus verformt wird, wie dies in der Figur 2 erkennbar ist. Dabei wird das Presswerkzeug 5 axial gegen den zylindrischen, auskragenden Abschnitt des Rohlings 1 gepresst. in einem folgenden Arbeitsschritt, wie er in der Figur 3 gezeigt ist, wird mittels einer radial und axial zustellbaren Drückrolle 6 der Flansch 4 ausgeformt, der sich radial zur Mittelachse hin erstreckt, rechtwinklig zum Mantelteil 3. A Vorverformung the Getriebeteües 2 by means of a pressing tool 5, with which the projecting out of the tool chuck 7 part of the blank 1 is first deformed into a cone, as can be seen in Figure 2. In this case, the pressing tool 5 is pressed axially against the cylindrical, projecting portion of the blank 1. In a subsequent working step, as shown in FIG. 3, the flange 4 is formed by means of a radially and axially deliverable spinning roller 6, which extends radially to the central axis, at right angles to the jacket part 3.
Durch axiale Zustellung kann eine Stufenprofilierung des Flansches 4 erreicht werden, wie sie in der Figur 4 erkennbar ist. By axial delivery, a step profiling of the flange 4 can be achieved, as can be seen in Figure 4.
Durch spanende oder spanlose Bearbeitung kann die Außenseite des Mantelteiles 3 mit beispielsweise einer Außenverzahnung versehen werden. Beim Drücken mittels der Drückroile 6 wird das als Halbzeug vorliegende Vorprodukt entsprechend der Figur 2 in Rotation versetzt, während die freidrehende Drückrolle 6 radial und axial zugestellt wird. Im Folgenden kann an den Flansch 4, ebenfalls durch Drücken eine konzentrische, axial ausgerichtete Nabe angeformt werden. By cutting or non-cutting machining, the outside of the casing part 3 can be provided with, for example, an external toothing. When pressing by means of the pusher rods 6, the precursor present as a semifinished product is set in rotation in accordance with FIG. 2, while the freely rotating pusher roller 6 is delivered radially and axially. In the following, a concentric, axially oriented hub can also be molded onto the flange 4, likewise by pressing.

Claims

Ansprüche claims
1. Verfahren zur Herstellung eines einstückigen, rotationssymmetrischen Ge- triebeteiies, insbesondere eines Starterkranzes, mit einem außenseitigen Mantelteii (3), an den sich ein in seiner Dicke dazu unterschiedlicher abgewinkelter, zur Mittelachse ausgerichteter Flansch (4) anschließt, dadurch gekennzeichnet, dass der Flansch (4) durch Umformen eines umfänglichen Abschnitts eines ringförmigen Rohlings (1) gebildet wird. 1. A method for producing a one-piece, rotationally symmetrical Getriebeteiies, in particular a starter ring, with a Außenant Mantelteii (3), to which a different in thickness thereto angled, aligned to the central axis flange (4), characterized in that the Flange (4) by forming a peripheral portion of an annular blank (1) is formed.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass der Flansch (4) unter Wandverdünnung im Drückverfahren hergesteilt wird. 2. The method according to claim 1, characterized in that the flange (4) is made under Wandverdünnung in the pressing process.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass vor dem Drücken des Flansches (4) ein Abschnitt des ringförmigen Rohlings zu einer konischen Vorform ausgebildet wird. 3. The method according to claim 1 or 2, characterized in that prior to pressing the flange (4), a portion of the annular blank is formed into a conical preform.
4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die konische Vorform des Flansches (4) mit einem Presswerkzeug (5) hergestellt wird. 4. The method according to any one of the preceding claims, characterized in that the conical preform of the flange (4) with a pressing tool (5) is produced.
5. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die konische Vorform des Flansches (4) mit einem Drückwerkzeug, insbesondere einer Drückrolle (6) hergestellt wird. 5. The method according to any one of the preceding claims, characterized in that the conical preform of the flange (4) with a spinning tool, in particular a spinning roller (6) is produced.
6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mittels mindestens einer Drückrolle (6) unterschiedliche Dicken und/oder Konturen des Flansches (4) hergestellt werden. 6. The method according to any one of the preceding claims, characterized in that by means of at least one pressure roller (6) different thicknesses and / or contours of the flange (4) are produced.
7. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass an den Flansch (4) durch Kaltverformen eine konzentrische Nabe angeformt wird. 7. The method according to any one of the preceding claims, characterized in that on the flange (4) by cold forming a concentric hub is formed.
8. Verfahren nach einen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die endgültige Kontur des Flansches durch ein Presswerk- zeughergestellt wird. 8. The method according to any one of the preceding claims, characterized in that the final contour of the flange is produced by a pressing tool.
9. Verfahren nach einen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der ringförmige Rohling (1) vor dem Umformen kalibriert wird. 9. The method according to any one of the preceding claims, characterized in that the annular blank (1) is calibrated before forming.
10. Nach dem Verfahren gemäß Anspruch 1 hergestelltes Getriebeteil, mit einem außenseitigen Mantelteil (3) und einem sich daran anschließenden, in seiner Dicke dazu unterschiedlichen, abgewinkelten, zur Mittelachse ausgerichteten Flansch (4), dadurch gekennzeichnet, dass das Mantelteil (3) in seiner Dicke m Wesentlichen der Wanddicke eines ringförmigen Rohlings (1) entspricht. 10. According to the method according to claim 1 produced gear part, with an outer side shell part (3) and an adjoining, in its thickness to different, angled, aligned to the central axis flange (4), characterized in that the casing part (3) in its thickness substantially corresponds to the wall thickness of an annular blank (1).
EP10740687.8A 2010-01-18 2010-08-11 Method for producing a rotationally symmetrical drive part Not-in-force EP2525926B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010004932 DE102010004932A1 (en) 2010-01-18 2010-01-18 Method for producing a rotationally symmetrical gear part and gear part
PCT/EP2010/061692 WO2011085829A1 (en) 2010-01-18 2010-08-11 Method for producing a rotationally symmetrical drive part and drive part

Publications (2)

Publication Number Publication Date
EP2525926A1 true EP2525926A1 (en) 2012-11-28
EP2525926B1 EP2525926B1 (en) 2013-12-11

Family

ID=43797529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10740687.8A Not-in-force EP2525926B1 (en) 2010-01-18 2010-08-11 Method for producing a rotationally symmetrical drive part

Country Status (4)

Country Link
EP (1) EP2525926B1 (en)
DE (1) DE102010004932A1 (en)
ES (1) ES2451520T3 (en)
WO (1) WO2011085829A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2983033A (en) 1960-01-04 1961-05-09 Darwin S Cox Method of manufacturing dished disks and the like

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19511963C2 (en) * 1995-03-31 2000-12-07 Leifeld Gmbh & Co Process for the production of rotationally symmetrical metallic workpieces
DE19620812B4 (en) * 1996-05-23 2005-07-28 Leifeld Metal Spinning Gmbh Method for producing a rotationally symmetrical body
US7797976B2 (en) 2003-11-17 2010-09-21 Wf-Maschinenbau Und Blechformtechnik Gmbh & Co. Kg Method for the production of a flange on a metal blank, and transmission part
JP2009195916A (en) * 2008-02-19 2009-09-03 Nippon Spindle Mfg Co Ltd Inner gear member forming method and forming apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2983033A (en) 1960-01-04 1961-05-09 Darwin S Cox Method of manufacturing dished disks and the like

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2011085829A1

Also Published As

Publication number Publication date
ES2451520T3 (en) 2014-03-27
DE102010004932A1 (en) 2011-07-21
WO2011085829A1 (en) 2011-07-21
EP2525926B1 (en) 2013-12-11

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