EP2525926B1 - Method for producing a rotationally symmetrical drive part - Google Patents

Method for producing a rotationally symmetrical drive part Download PDF

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Publication number
EP2525926B1
EP2525926B1 EP10740687.8A EP10740687A EP2525926B1 EP 2525926 B1 EP2525926 B1 EP 2525926B1 EP 10740687 A EP10740687 A EP 10740687A EP 2525926 B1 EP2525926 B1 EP 2525926B1
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EP
European Patent Office
Prior art keywords
flange
produced
blank
rotationally symmetrical
spinning
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
EP10740687.8A
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German (de)
French (fr)
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EP2525926A1 (en
Inventor
Udo Friese
Heiko Ohlscher
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WF Maschinenbau und Blechformtecknik GmbH and Co KG
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WF Maschinenbau und Blechformtecknik GmbH and Co KG
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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
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    • 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.
  • Gear parts produced in this way are used in various fields of application, for example as starter rings in motor vehicles.
  • the starter rings used so far are either made in one piece from a round blank or by welding the separately manufactured sprocket also on the separate flange.
  • 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 outer side shell part When using said round blank, the outer side shell part must be produced by an edge thickening, for which purpose material is pressed out of the blank into the outer edge region by means of cold forming in the spinning process.
  • 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-rolled intermediate product whose wall thickness substantially corresponds to the thickness of the casing part of the finished gear part, into which Production of a starter ring, an external toothing is introduced.
  • the flange to be formed according to the invention adjoins the jacket part and is preferably pressed or deformed radially inwards by pressing with at least one spinning roller, starting from the thickness of the jacket part, with wall thinning.
  • the formation of the flange can be carried out in several steps, e.g. first by molding a frusto-conical contour on the ring-shaped blank by means of a pressing tool, and then pressing / forming in the direction of the central axis of the gear member 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, in particular with a very complex flange contour, the final contour can be produced by a pressing tool.
  • 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 both in the axial and in the radial direction of the transmission part, so that different thicknesses and contours of the flange can be produced without difficulty.
  • FIG. 1 is an annular blank 1 recognizable, which is to a rotationally symmetrical gear part 2, in particular a starter ring, deformed, as in the FIG. 4 as a finished product is shown schematically.
  • This blank 1 is in a tool chuck 7 ( FIG. 2 ) of a device for carrying out the method with a section which in the finished product ( FIG. 4 ) forms a shell part 3, held, while another part projects beyond the tool chuck 7, from which then a radially extending flange 4 is formed.
  • a pre-deformation of the gear part 2 by means of a pressing tool 5, with which the protruding from the tool chuck 7 part of the blank 1 is first deformed into a cone, as shown in the FIG. 2 is recognizable.
  • 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 shell part.
  • the outside of the casing part 3 can be provided with, for example, an external toothing.
  • the precursor present as a semifinished product corresponding to FIG. 2 set in rotation while the freely rotating pressure roller 6 is delivered radially and axially.
  • a concentric, axially oriented hub can also be molded onto the flange 4, likewise by pressing.

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

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines rotationssymmetrischen Getriebeteiles gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a method for producing a rotationally symmetrical gear part according to the preamble of claim 1.

Derartighergestellte Getriebeteile finden in unterschiedlichen Anwendungsbereichen Verwendung, beispielsweise als Starterkränze in Kraftfahrzeugen.Gear parts produced in this way are used in various 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 entweder einstückig aus einer Ronde oder durch Anschweißen des separat gefertigten Zahnkranzes am ebenfalls separaten Flansch, hergestellt.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 so far are either made in one piece from a round blank or by welding the separately manufactured sprocket also on the separate flange.

Aus der EP 1 697 066 B1 ist ein Verfahren zur Herstellung eines solchen Getriebeteiles bekannt, das aus einer Blechronde als Halbzeug im Drückverfahren hergestellt ist, bei dem die erforderliche Formgebung durch Drücken/Umformen des Materials erfolgt.From the EP 1 697 066 B1 a method for producing such a gear part is known, which is made of a sheet metal 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 Mantelteiles, 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 shell part, 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 Serienfertigung hergestellt werden, kommt der Optimierung des Materialverbrauchs eine ebenso hohe Bedeutung zu wie einer Optimierung der Fertigung selbst.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.

Bei einem Einsatz der genannten Ronde muss das außenseitige Mantelteil durch eine Randverdickung hergestellt werden, wozu im Drückverfahren mittels Kaltverformung Material aus der Ronde in den äußeren Randbereich gedrückt wird.When using said round blank, the outer side shell part must be produced by an edge thickening, for which purpose material is pressed out of the blank into the outer edge region by means of cold forming in the spinning process.

Allerdings ist dies sowohl hinsichtlich der Fertigungskosten, resultierend aus den Bearbeitungszeiten, wie auch hinsichtlich der erforderlichen Fertigungsqualität unbefriedigend, da es im letzteren Fall am Innenumfang des Mantelteiles 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, since it can cause wrinkling and / or cracking on the inner circumference of the casing part in the latter case, with the result of a corresponding reject rate, which naturally unfavorable to the cost structure.

In der DE 196 20 812 A1 ist ein Verfahren zur Herstellung eines rotationssymmetrischen Getriebeteiles geoffenbart, bei dem eine konische Vorform zur Ausbildung des Flansches mittels einer Drückrolle hergestellt wird.In the DE 196 20 812 A1 there is disclosed a method of manufacturing a rotationally symmetrical gear part in which a conical preform for forming the flange is produced by means of a spinning roller.

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 Getriebeteil bildet, kann aus einem geschweißten Flacheisen, einem Rohrabschnitt, einem geschmiedeten oder ringgewalzten Vorprodukt bestehen, dessen Wanddicke im Wesentlichen der Dicke des Mantelteiles des fertigen Getriebeteiles entspricht, in das, bei Herstellung eines Starterkranzes, eine Außenverzahnung eingebracht wird.The annular blank which forms the semifinished product, that is to say the starting product for the gear part to be produced, can consist of a welded flat iron, a pipe section, a forged or ring-rolled intermediate product whose wall thickness substantially corresponds to the thickness of the casing part of the finished gear part, into which Production of 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 Mantelteiles, radial nach innen gedrückt bzw. umgeformt, unter Wandverdünnung.The flange to be formed according to the invention adjoins the jacket part and is preferably pressed or deformed radially inwards by pressing with at least one spinning roller, starting from the thickness of the jacket part, with wall thinning.

Dabei kann die Anformung des Flansches in mehreren Arbeitsschritten erfolgen, z.B. zunächst durch Anformen einer kegelstumpfförmigen Kontur an den ringförmingen Rohling mittels eines Presswerkzeugs, und anschließendes Drücken/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 carried out in several steps, e.g. first by molding a frusto-conical contour on the ring-shaped blank by means of a pressing tool, and then pressing / forming in the direction of the central axis of the gear member by means of the spinning roller, with simultaneous dilution of the Flanschwandung.

Je nach Bedarf können unterschiedliche Wanddicken über die Kontur des Flansches 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 Flanschkontur, 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, in particular with a very complex flange contour, the final contour can be produced by a pressing tool.

Mithilfe der Drückrolle können im Übrigen auch unterschiedliche Wanddicken des Flansches hergestellt werden, je nach Zustellung der Drückrolle 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 both in the axial and 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 Formteil 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 Getriebeteile, wie erwähnt, als Serienartikel in großen Stückzahlen hergestellt werden.Since a substantially cylindrical molded part is used as the blank, compared to the prior art, in which a Ronde is used, the production is virtually waste-free, which naturally results in significant cost advantages, especially because such gear parts, as mentioned, as a series item be produced in large quantities.

Da eine Randverdickung zur Herstellung des Mantelteiles nun nicht mehr erforderlich ist, da das Mantelteil in seiner Dicke der Dicke des Ausgangsmaterials entspricht, werden auch die beschriebenen Nachteile der Falten- und/oder Rissbildung 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 shell part is no longer necessary because the shell part in its thickness corresponds to the thickness of the starting material, the described disadvantages of wrinkling and / or cracking are avoided in a thickening of the shell part, resulting in a reduction of the reject rate and consequently an optimization of the production costs.

Weitere vorteilhafte Ausbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Further advantageous embodiments of the invention are characterized in the subclaims.

Das erfindungsgemäße Verfahren wird nachfolgend anhand der beigefügten Zeichnungen nochmals beschrieben.The inventive method will be described again with reference to the accompanying drawings.

Es zeigen:

Figuren 1-4
unterschiedliche Verfahrensschritte, jeweils in einer geschnittenen Seitenansicht einer Vorrichtung zur Durchführung des Verfahrens sowie eines Getriebeteiles.
Show it:
Figures 1-4
different process steps, each in a sectional side view of an apparatus for performing the method and a transmission part.

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.In the FIG. 1 is an annular blank 1 recognizable, which is to a rotationally symmetrical gear part 2, in particular a starter ring, deformed, as in the FIG. 4 as a finished product is shown schematically.

Dieser Rohling 1 ist in ein Werkzeugfutter 7 (Figur 2) einer Vorrichtung zur Durchführung 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 in a tool chuck 7 ( FIG. 2 ) of a device for carrying out the method with a section which in the finished product ( FIG. 4 ) forms a shell part 3, held, while another part projects beyond the tool chuck 7, from which then a radially extending flange 4 is formed.

Eine Vorverformung des Getriebeteiles 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.A pre-deformation of the gear part 2 by means of a pressing tool 5, with which the protruding from the tool chuck 7 part of the blank 1 is first deformed into a cone, as shown in the FIG. 2 is recognizable. In this case, the pressing tool 5 is pressed axially against the cylindrical, projecting portion of the blank 1.

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.In a following step, as in the FIG. 3 is shown, 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 shell 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 shown in the FIG. 4 is recognizable.

Durch spanende oder spanlose Bearbeitung kann die Außenseite des Mantelteiles 3 mit beispielsweise einer Außenverzahnung versehen werden.By cutting or non-cutting machining, the outside of the casing part 3 can be provided with, for example, an external toothing.

Beim Drücken mittels der Drückrolle 6 wird das als Halbzeug vorliegende Vorprodukt entsprechend der Figur 2 in Rotation versetzt, während die freidrehende Drückrolle 6 radial und axial zugestellt wird.When pressing by means of the spinning roller 6, the precursor present as a semifinished product corresponding to FIG. 2 set in rotation while the freely rotating pressure roller 6 is delivered radially and axially.

Im Folgenden kann an den Flansch 4, ebenfalls durch Drücken eine konzentrische, axial ausgerichtete Nabe angeformt werden.In the following, a concentric, axially oriented hub can also be molded onto the flange 4, likewise by pressing.

Claims (5)

  1. Method for producing a single-piece, rotationally symmetrical drive part, in particular a starter ring, with an external casing part (3) which is adjoined by an angled flange (4), the thickness of which differs with respect thereto, and which is aligned with respect to the centre axis, characterized in that the flange (4) is produced by deforming a circumferential section of an annular blank (1) and with wall reduction by spinning, wherein, before the spinning of the flange (4), the annular blank (1) is developed with a pressing tool (5) into a conical preform.
  2. Method according to Claim 1, characterized in that different thicknesses and/or contours of the flange (4) are produced by means of at least one spinning roller (6).
  3. Method according to Claim 1 or 2, characterized in that a concentric hub is integrally formed on the flange (4) by cold deformation.
  4. Method according to one of the preceding claims, characterized in that the final contour of the flange is produced by a pressing tool.
  5. Method according to one of the preceding claims, characterized in that the annular blank (1) is calibrated before the deformation.
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 EP2525926A1 (en) 2012-11-28
EP2525926B1 true EP2525926B1 (en) 2013-12-11

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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)

Family Cites Families (5)

* 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
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
KR101151463B1 (en) 2003-11-17 2012-06-01 베에프-마쉰넨바우 운트 블레히포름테크닉 게엠베하 운트 컴파니 카게 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

Also Published As

Publication number Publication date
WO2011085829A1 (en) 2011-07-21
DE102010004932A1 (en) 2011-07-21
EP2525926A1 (en) 2012-11-28
ES2451520T3 (en) 2014-03-27

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