EP1697066B1 - Method for the production of a flange on a circular sheet metal blank - Google Patents

Method for the production of a flange on a circular sheet metal blank Download PDF

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Publication number
EP1697066B1
EP1697066B1 EP04803144A EP04803144A EP1697066B1 EP 1697066 B1 EP1697066 B1 EP 1697066B1 EP 04803144 A EP04803144 A EP 04803144A EP 04803144 A EP04803144 A EP 04803144A EP 1697066 B1 EP1697066 B1 EP 1697066B1
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EP
European Patent Office
Prior art keywords
flange
metal blank
pressure roller
blank
circular sheet
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.)
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EP04803144A
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German (de)
French (fr)
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EP1697066A1 (en
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
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WF Maschinenbau und Blechformtecknik GmbH and Co KG
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Priority claimed from DE10358844A external-priority patent/DE10358844B4/en
Application filed by WF Maschinenbau und Blechformtecknik GmbH and Co KG filed Critical WF Maschinenbau und Blechformtecknik GmbH and Co KG
Publication of EP1697066A1 publication Critical patent/EP1697066A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14Spinning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14Spinning
    • B21D22/18Spinning using tools guided to produce the required profile
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00Making other particular articles
    • B21D53/26Making other particular articles wheels or the like

Definitions

  • the invention relates to a method for producing a flange on a sheet metal blank by means of at least one or more spinning roller (s) rotating relative to the sheet metal blank.
  • the metal blank is not held by means of chucks but by means of an abutment chuck, which is ring-shaped and has a slightly larger inner diameter than the metal blank in its initial state.
  • an abutment chuck which is ring-shaped and has a slightly larger inner diameter than the metal blank in its initial state.
  • the spinning roller is moved axially inwards, so again in the manner of DE 4400257C1 around a central spike or the like forms a hub.
  • flanges are to be formed on the metal blanks whose radial ring width is greater than their axial height.
  • the flange should also be slightly thicker than the starting material.
  • the axial extent of the flange is less than its radial extent.
  • the flange should preferably be axially thicker than the starting workpiece.
  • the radial extent of the flange is more than two, in particular more than three times as large as its axial extent, which is particularly advantageous in the realization before starter rings with relatively flat flanges of thin blanks as the starting workpiece.
  • the formation of the conical structure can in particular be effected in the simplest way that the angle of attack ( ⁇ ) of the pressure roller relative to the axial surface of the metal blank is greater than 90 °. Particularly good results are achieved when the angle of attack ( ⁇ ) of the pressure roller relative to the axial surface of the metal blank is greater than 110 ° and less than 170 °, in particular greater than 115 ° and less than 150 °.
  • the metal blank is held on its outer periphery by an abutment chuck.
  • it is suitable for very thin discs (for starter wreaths etc.), when the metal blank is held down on its side facing the spinning roller at least in sections in the outer region of a ring.
  • very well "thin" starter rings for engines can be made, from a few mm (less than five mm) thick disc-shaped Ronde a ring is made with an inner flange.
  • the blank is thereby reduced to eg only 3mm thickness in a central radial region.
  • the resulting inner projection to the flange is formed (in particular on a press) and the outer edge shaped in a conventional manner in the manner of a starter ring.
  • the flange is formed on the side facing away from the spinning roller side of the metal blank.
  • the flange is formed on its side facing the spinning roller of the metal blank when the tool has a corresponding recess in the area provided for the flange. It is also conceivable that the flange extends to both axial sides of the metal blank.
  • a further advantageous embodiment is characterized in that the flange is pressed into a tool with a contour, in particular a toothing, so that the flange is provided on its side facing the tool with a corresponding contour, in particular a toothing.
  • the invention also provides a transmission part with a flange, in particular around a central bore, wherein the flange of the transmission part is manufactured by a method according to one of claims 1 to 21 and integrally connected to the rest of the transmission part.
  • This transmission part is preferably formed as a starter ring, which is made from a blank having less than 7, in particular less than 5, preferably less than 4mm, wherein the starter ring is in sections thinner than the starting width of the blank and wherein the starter ring integrally molded in the pressing flange to an inner through-hole that is more than two, in particular more than four times as wide (radial extent) as high (axial extent).
  • the flange was made from a separate ring which was mounted on a round blank. This can be omitted with the invention surprisingly.
  • a sprocket ring is attached or integrally formed on the outer circumference of the starter ring, the appearance of the starter ring is similar in principle to that of Fig. 4. However, the proportions are different, because the flange is only slightly higher than the Huaweironde (Fig. 5).
  • Fig. 1 shows a disc-shaped, circular metal blank 1, which is penetrated by a central bore 2 and which is inserted in the manner of Fig. 5 in a tool that rotates during machining about the axis S.
  • the metal blank 1 as a starting workpiece is inserted into a tool and held on its outer periphery, preferably by an abutment chuck in the manner of DE 44 44 536 C1 , Its central bore 2 may be penetrated by a preferably conically shaped centric mandrel.
  • the conical structure 4 is then subjected to a post-processing to form the flange 7 in order to achieve a shape in which the axial height of the flange is smaller than its radial extent "b".
  • This post-processing can be carried out by means of a further pressure roller, which is designed in the manner of a rotatable pressing or Anstellrolle 5, which is guided radially from outside to inside or by means of a further pressure roller 6, which is guided again axially from outside to inside, namely in particular such that from the conical structure directly in the next operation, the shape of a flange is formed (in particular around a central mandrel around).
  • the angle of attack of the further rotatable pressure roller 6 is preferably about 90 °.
  • an axially and / or radially deliverable rotatable hold-down roller in the manner of the Anstellrolle 5 e.g. at the side of the metal blank, which is radially opposite the spinning roller 3, which at least partially depresses the metal blank, so that it does not lift off the tool in the region in which the spinning roller 3 moves or bulges out from it.
  • a post-processing with other means is conceivable, so by means of a press or the like, which then alternatively forms the flange from the hub-like structure.
  • a press or the like which then alternatively forms the flange from the hub-like structure.
  • the post-processing in the same setting with a further deforming role.
  • Fig. 1 after which the immersion is offset slightly from the outer periphery of the metal blank 1 inwardly, there is the additional advantage that on the outer circumference of the metal blank 1 remains a region 8, which can be subjected to further processing, for example, to a profiling in the manner of profiling a pulley or a toothing of a starter ring or the like form (not shown).
  • a contour e.g. a toothing
  • a contour in the first or another second tool, so that the flange when pressing or the like.
  • a corresponding contour in particular a toothing 10.
  • Fig. 5 shows a processed by the process according to the invention blank 12 for producing a starter ring, which was made of a flat metal blank.
  • an applied (or imprinted) ring 14 for holding down the relatively thin metal blank 1 in the outer region and the possibility of the metal blank in addition also between the outer periphery and the inner flange sections thinner or to press thicker and / or in the direction of the axis S conical and / or stepped to press against the correspondingly formed tool die.
  • a toothing eg radial toothing
  • a toothing in the manner of the toothing 10 would additionally be formed in the flange (not visible in FIG. 5).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

A method of forming a flange on a circular metal blank (1) has the following steps: By means of at least one pressure roller (3), a hub-type and/or conical structure is formed on the circular metal blank, and from the conical structure (4), a flange (7) is formed on the circular metal blank (1) by means of a subsequent treatment.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines Flansches an einer Blechronde mittels wenigstens einer oder mehreren relativ zur Blechronde rotierender Drückrolle(n).The invention relates to a method for producing a flange on a sheet metal blank by means of at least one or more spinning roller (s) rotating relative to the sheet metal blank.

Aus der DE 44 00 257 C1 sowie den parallelen Patentfamilienmitgliedern (u.a. EP, US, JP) ist es bekannt, spanlos eine Nabe an einer Metallronde auszubilden, indem eine von einem Werkzeug einer Hauptspindel getragene und relativ zu einer oder mehreren zunächst etwas axial und dann nach dem Eintauchen in die Ronde radial zugestellten Drückrollen rotierende Blechplatine bzw. -ronde durch Drücken mittels der Drückrolle in ihrer Dicke verringert und zu einem von der Blechplatine vorstehenden zylindrischen Vorsprung verformt wird, der die Metallronde durchsetzt. Dieses Verfahren ist zuverlässig und kostengünstig und hat sich in der Praxis sehr gut bewährt. Es eignet sich insbesondere zur Herstellung von Naben, die axial relativ hoch von der der Nabe zugewandten Oberfläche der Metallronde vorstehen. Gehalten wird die Metallronde an ihrem Außenumfang durch Spannfutter.From the DE 44 00 257 C1 As well as the parallel patent family members (including EP, US, JP), it is known to form a hub without cutting on a metal blank by one carried by a tool of a main spindle and relative to one or more first a little axially and then after immersion in the Ronde radially supplied pressing rollers rotating sheet metal blanks or -ronde reduced by pressing means of the spinning roller in thickness and is deformed to a protruding from the sheet metal plate cylindrical projection which passes through the metal blank. This method is reliable and inexpensive and has proven very well in practice. It is particularly suitable for the production of hubs which protrude axially relatively high from the hub facing surface of the metal blank. The metal blank is held on its outer circumference by chucks.

Aus der DE 100 33 239 A1 ist es bekannt, bei einem Getriebeteil mittels einer Drückrolle konisch zu gestalten.From the DE 100 33 239 A1 It is known to make conical in a transmission part by means of a spinning roller.

Aus der DE 44 44 526 C1 ist es bekannt, dass die Metallronde nicht mittels Spannfuttern sondern mittels eines Widerlagerfutters gehalten wird, welches ringartig ausgebildet ist und einen etwas größeren Innendurchmesser aufweist als die Metallronde in ihrem Ausgangszustand. Beim ersten Eintauchen der Drückrolle in die Axialfläche der Metallronde wird diese an ihrem Außenumfang gegen den Innenumfang des Widerlagerfutters gedrückt und dort sicher gehalten. Sodann wird die Drückrolle axial nach innen bewegt, so dass sich wiederum nach Art der DE 4400257C1 um einen mittigen Dorn oder dergleichen eine Nabe ausbildet.From the DE 44 44 526 C1 It is known that the metal blank is not held by means of chucks but by means of an abutment chuck, which is ring-shaped and has a slightly larger inner diameter than the metal blank in its initial state. During the first immersion of the spinning roller in the axial surface of the metal blank it is pressed against its outer periphery against the inner circumference of the abutment chuck and held there securely. Then, the spinning roller is moved axially inwards, so again in the manner of DE 4400257C1 around a central spike or the like forms a hub.

Ausgehend von diesem Stand der Technik ist es die Aufgabe der Erfindung, ein Verfahren zu schaffen, mit dem sich auch "flachere" Naben, nachfolgend Flansche genannt, spanlos an Metallronden herstellen lassen. Insbesondere sollen Flansche an den Metallronden ausgebildet werden, deren radiale Ringbreite größer ist als ihre axiale Höhe. Insbesondere soll der Flansch auch etwas dicker sein können als das Ausgangsmaterial.Based on this prior art, it is the object of the invention to provide a method with which even "flatter" hubs, called flanges below, can be produced without cutting on metal blanks. In particular, flanges are to be formed on the metal blanks whose radial ring width is greater than their axial height. In particular, the flange should also be slightly thicker than the starting material.

Diese Aufgabe wird durch den Gegenstand des Anspruchs 1 gelöst.This object is solved by the subject matter of claim 1.

Damit ist es möglich, dass die axiale Erstreckung des Flansches geringer ist als seine radiale Erstreckung. Der Flansch soll aber axial vorzugsweise dicker sein als das Ausgangswerkstück. Ganz besonders bevorzugt ist die radiale Erstreckung des Flansches mehr als zwei, insbesondere mehr als drei mal so groß ist wie seine axiale Erstreckung, was insbesondere bei der Realisierung vor Starterkränzen mit relativ flachen Flanschen aus dünnen Ronden als Ausgangswerkstück vorteilhaft ist..Thus, it is possible that the axial extent of the flange is less than its radial extent. However, the flange should preferably be axially thicker than the starting workpiece. Most preferably, the radial extent of the flange is more than two, in particular more than three times as large as its axial extent, which is particularly advantageous in the realization before starter rings with relatively flat flanges of thin blanks as the starting workpiece.

Die derart mit nur wenigen Arbeitsschritten aus Metallronden einfach fertigbaren Ronden mit Flanschansätzen eignen sich insbesondere zur Herstellung von Motor- und Getriebeteilen aller Art, die einen flachen Flanschansatz im mittleren Bereich, insbesondere rund um ein die Ronde durchsetzendes zentrisches Loch, aufweisen sollen.The thus easily manufactured with only a few steps from metal blanks circular blanks with flange approaches are particularly suitable for the production of engine and transmission parts of all kinds, which should have a flat Flanschansatz in the central region, in particular around a round penetrating through the center hole.

Die Ausbildung des kegeligen Gebildes kann insbesondere dadurch auf einfachste Weise erfolgen, dass der Anstellwinkel (α) der Drückrolle relativ zur Axialfläche der Metallronde größer als 90° ist. Besonders gute Ergebnisse werden erzielt, wenn der Anstellwinkel (α) der Drückrolle relativ zur Axialfläche der Metallronde größer als 110° und kleiner als 170° ist, insbesondere größer als 115° und kleiner als 150°.The formation of the conical structure can in particular be effected in the simplest way that the angle of attack (α) of the pressure roller relative to the axial surface of the metal blank is greater than 90 °. Particularly good results are achieved when the angle of attack (α) of the pressure roller relative to the axial surface of the metal blank is greater than 110 ° and less than 170 °, in particular greater than 115 ° and less than 150 °.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments of the invention are specified in the subclaims.

Vorzugsweise wird die Metallronde an ihrem Außenumfang von einem Widerlagerfutter gehalten. Ergänzend bietet es sich bei sehr dünnen Ronden (für Starterkränze usw.) an, wenn die Metallronde an ihrer der Drückrolle zugewandten Seite zumindest abschnittsweise im äußeren Bereich von einem Ring niedergehalten wird. Auf diese Weise können besonders gut "dünne" Starterkränze für Motoren gefertigt werden, wobei aus einer nur wenige mm (weniger als fünf mm) dicken scheibenartigen Ronde ein Kranz mit einem inneren Flansch gefertigt wird. Die Ronde wird dabei auf z.B. nur 3mm Dicke in einem mittleren radialen Bereich verringert. Sodann wird der entstehende innere Vorsprung zum Flansch umgeformt (insbesondere auf einer Presse) und der äußere Rand in an sich bekannter Weise nach Art eines Starterkranzes geformt.Preferably, the metal blank is held on its outer periphery by an abutment chuck. In addition, it is suitable for very thin discs (for starter wreaths etc.), when the metal blank is held down on its side facing the spinning roller at least in sections in the outer region of a ring. In this way, very well "thin" starter rings for engines can be made, from a few mm (less than five mm) thick disc-shaped Ronde a ring is made with an inner flange. The blank is thereby reduced to eg only 3mm thickness in a central radial region. Then, the resulting inner projection to the flange is formed (in particular on a press) and the outer edge shaped in a conventional manner in the manner of a starter ring.

Vorzugsweise wird der Flansch an der von der Drückrolle abgewandten Seite der Metallronde ausgebildet.Preferably, the flange is formed on the side facing away from the spinning roller side of the metal blank.

Es ist aber überraschend auch möglich, dass der Flansch an ihrer der Drückrolle zugewandten Seite der Metallronde ausgebildet wird, wenn das Werkzeug eine entsprechende Aussparung in dem für den Flansch vorgesehenen Bereich aufweist. Ebenfalls denkbar ist es, das sich der Flansch zu beiden axialen Seiten der Metallronde erstreckt.However, it is surprisingly also possible that the flange is formed on its side facing the spinning roller of the metal blank when the tool has a corresponding recess in the area provided for the flange. It is also conceivable that the flange extends to both axial sides of the metal blank.

Eine weitere vorteilhafte Ausgestaltung ist dadurch gekennzeichnet, dass der Flansch in ein Werkzeug mit einer Kontur, insbesondere einer Verzahnung gedrückt wird, so dass der Flansch an seiner dem Werkzeug zugewandten Seite mit einer korrespondierenden Kontur, insbesondere einer Verzahnung, versehen wird.A further advantageous embodiment is characterized in that the flange is pressed into a tool with a contour, in particular a toothing, so that the flange is provided on its side facing the tool with a corresponding contour, in particular a toothing.

Die Erfindung schafft auch ein Getriebeteil mit einem Flansch, insbesondere rund um eine zentrische Bohrung, wobei der Flansch des Getriebeteils nach einem Verfahren nach einem der Ansprüche 1 bis 21 gefertigt und einstückig mit dem übrigen Getriebeteil verbunden ist. Dieses Getriebeteil ist vorzugsweise als Starterkranz ausgebildet, welcher aus einer Ronde mit weniger als 7, insbesondere weniger als 5, vorzugsweise weniger als 4mm gefertigt wird, wobei der Starterkranz abschnittweise dünner als die Ausgangsbreite der Ronde ist und wobei der Starterkranz einen einstückig im Drückverfahren angeformten Flansch zu einem inneren Durchgangsloch hin aufweist, der mehr als zwei, insbesondere mehr als vier mal so breit (radialer Erstreckung) wie hoch ist (axiale Erstreckung).The invention also provides a transmission part with a flange, in particular around a central bore, wherein the flange of the transmission part is manufactured by a method according to one of claims 1 to 21 and integrally connected to the rest of the transmission part. This transmission part is preferably formed as a starter ring, which is made from a blank having less than 7, in particular less than 5, preferably less than 4mm, wherein the starter ring is in sections thinner than the starting width of the blank and wherein the starter ring integrally molded in the pressing flange to an inner through-hole that is more than two, in particular more than four times as wide (radial extent) as high (axial extent).

Bei dem Starterkranz nach dem Stand der Technik wurde der Flansch aus einem separaten Ring gefertigt, der auf eine Ronde aufgesetzt wurde. Dies kann mit der Erfindung überraschend entfallen. Bevorzugt wird an den Außenumfang des Starterkranzes ein Zahnkranzring angesetzt oder einstückig angeformt, Das Aussehen des Starterkranzes ähnelt prinzipiell dem der Fig. 4. Allerdings sind die Proportionen anders, denn der Flansch ist nur geringfügig höher als die Ausgangsronde (Fig. 5).In the prior art starter ring, the flange was made from a separate ring which was mounted on a round blank. This can be omitted with the invention surprisingly. Preferably, a sprocket ring is attached or integrally formed on the outer circumference of the starter ring, the appearance of the starter ring is similar in principle to that of Fig. 4. However, the proportions are different, because the flange is only slightly higher than the Ausgangsronde (Fig. 5).

Nachfolgend wird die Erfindung anhand von Ausführungsbeispielen unter Bezug auf die Zeichnung näher beschrieben. Es zeigt:

Fig. 1
eine Metallronde als Ausgangswerkstück vor seiner Bearbeitung;
Fig. 2
die Metallronde während eines ersten Bearbeitungsschrittes;
Fig. 3
die Metallronde aus Fig. 1 und 2 während eines weiteren Arbeitsganges, wobei schematisch zwei verschiedene Möglichkeiten zur Realisierung dieses Arbeitsganges dargestellt sind; und
Fig. 4
die Metallronde mit einem spanlos hergestellten Flanschabschnitt;
Fig. 5
einen nach dem erfindungsgemäßen Verfahren bearbeiteten Rohling zur Herstellung eines Starterkranzes.
The invention will be described in more detail by means of exemplary embodiments with reference to the drawing. It shows:
Fig. 1
a metal blank as a starting workpiece prior to its machining;
Fig. 2
the metal blank during a first processing step;
Fig. 3
the metal blank of Figures 1 and 2 during another operation, wherein schematically two different ways to implement this operation are shown. and
Fig. 4
the metal blank with a non-cutting manufactured flange portion;
Fig. 5
a processed by the novel process blank for producing a starter ring.

Fig. 1 zeigt eine scheibenförmige, kreisrunde Metallronde 1, welche von einer zentrischen Bohrung 2 durchsetzt ist und die nach Art der Fig. 5 in ein Werkzeug eingesetzt ist, dass bei der Bearbeitung um die Achse S rotiert.Fig. 1 shows a disc-shaped, circular metal blank 1, which is penetrated by a central bore 2 and which is inserted in the manner of Fig. 5 in a tool that rotates during machining about the axis S.

Nachfolgend wird die axiale Dicke der Metallronde 1 in ihrem Ausgangszustand mit "d", der Radius des zentrischen Durchgangsloches 2 vor der Bearbeitung mit "r1" und nach der Bearbeitung mit "r2" bezeichnet, die axiale Erstreckung des Flansches 7 - Fig. 4 - nach der Bearbeitung mit "a und die radiale Erstreckung mit "b".Hereinafter, the axial thickness of the metal blank 1 in its initial state with "d", the radius of the central through hole 2 before machining with "r1" and after machining with "r2", the axial extent of the flange 7 - Fig. 4 -. after machining with "a and the radial extent with" b ".

Die Metallronde 1 als Ausgangswerkstück wird in ein Werkzeug eingesetzt und an ihrem Außenumfang gehalten, bevorzugt durch ein Widerlagerfutter nach Art der DE 44 44 536 C1 . Ihre zentrische Bohrung 2 kann von einem vorzugsweise kegelig geformten zentrischen Dorn durchsetzt sein.The metal blank 1 as a starting workpiece is inserted into a tool and held on its outer periphery, preferably by an abutment chuck in the manner of DE 44 44 536 C1 , Its central bore 2 may be penetrated by a preferably conically shaped centric mandrel.

Die eigentliche Bearbeitung folgt zunächst den in der DE 44 00 257 C1 oder DE 44 44 536 C1 beschriebenen Verfahren, d.h., bevorzugt taucht mindestens eine relativ zur Blechronde rotierende, drehbare Drückrolle 3 zunächst axial von außen in die vom Werkzeug (hier nicht dargestellt) abgewandte Axialseite der mit dem Werkzeug rotierenden Metallronde 1 ein, so dass diese beim Einsatz eines ringartigen Widerlagerfutters zunächst formschlüssig an dem Innenumfang dieses Widerlagerfutters gelegt wird.The actual editing follows first in the DE 44 00 257 C1 or DE 44 44 536 C1 described method, ie preferably immersed at least one rotating relative to the circular blank, rotatable spinning roller 3 initially axially from the outside of the tool (not shown here) facing away from the axial side of the rotating with the tool metal blank 1, so that they initially when using an annular abutment chuck is placed positively on the inner circumference of this abutment chuck.

Durch gleichzeitige oder anschließende Bewegung der relativ zur Blechronde rotierenden Drückrolle 3 radial nach innen - zur Bohrung 2 hin - bildet sich ein nabenartiges bzw. -ähnliches, sich kegelig verjüngendes Gebilde 4 am Innenumfang der Metallronde 1 bzw. an der Bohrung 2 aus. Diese Gebilde 4 am Innenumfang der Metallronde steht in kegeliger Form radial nach außen vor, da der Anstellwinkel α an der Vorschubflanke 9 der Drückrolle 3 relativ zur Metallrondenoberfläche negativ bzw. größer als 90° ist. Bevorzugt liegt der Anstellwinkel zwischen 110° und 170°, insbesondere zwischen 115° und 140°.By simultaneous or subsequent movement of the rotating relative to the circular blanking roller 3 radially inward - to the bore 2 out - forms a hub-like or -like, conically tapered structure 4 on the inner circumference of the metal blank 1 and at the bore 2. This structure 4 on the inner circumference of the metal blank protrudes radially outwards in a conical shape, since the angle of attack α at the advancing flank 9 of the spinning roller 3 is negative or greater than 90 ° relative to the metal-bladed surface. The angle of attack is preferably between 110 ° and 170 °, in particular between 115 ° and 140 °.

Das kegelige Gebilde 4 wird sodann zur Ausbildung der Flansches 7 einer Nachbearbeitung unterzogen, um eine Form zu erzielen, bei welcher die axiale Höhe des Flansches kleiner ist als seine radiale Erstreckung "b".The conical structure 4 is then subjected to a post-processing to form the flange 7 in order to achieve a shape in which the axial height of the flange is smaller than its radial extent "b".

Diese Nachbearbeitung kann mittels einer weiteren Drückrolle erfolgen, welche nach Art einer drehbaren Drück- bzw. Anstellrolle 5 ausgebildet ist, die radial von außen nach innen geführt wird oder mittels einer weiteren Drückrolle 6, die nochmals axial von außen nach innen geführt wird, und zwar insbesondere derart, dass aus dem kegeligen Gebilde direkt im nächsten Arbeitsgang die Form eines Flansches geformt wird (insbesondere um einen zentrischen Dorn herum). Der Anstellwinkel der weiteren drehbaren Drückrolle 6 liegt bevorzugt bei ca. 90°.This post-processing can be carried out by means of a further pressure roller, which is designed in the manner of a rotatable pressing or Anstellrolle 5, which is guided radially from outside to inside or by means of a further pressure roller 6, which is guided again axially from outside to inside, namely in particular such that from the conical structure directly in the next operation, the shape of a flange is formed (in particular around a central mandrel around). The angle of attack of the further rotatable pressure roller 6 is preferably about 90 °.

Es ist auch denkbar, dass beim Ausbilden des kegeligen Gebildes gleichzeitig eine axial und/oder radial zustellbare drehbare Niederhalterolle (siehe die 15 in Fig. 5) nach Art der Anstellrolle 5 z.B. an der der Drückrolle 3 radial gegenüberliegenden Seite der Metallronde mitläuft, welche die Metallronde zumindest abschnittsweise niederdrückt, damit sich diese nicht in dem Bereich, in dem die Drückrolle 3 bewegt, vom Werkzeug abhebt bzw. von diesem vorwölbt.It is also conceivable that in forming the conical structure at the same time an axially and / or radially deliverable rotatable hold-down roller (see the 15 in Fig. 5) in the manner of the Anstellrolle 5 e.g. at the side of the metal blank, which is radially opposite the spinning roller 3, which at least partially depresses the metal blank, so that it does not lift off the tool in the region in which the spinning roller 3 moves or bulges out from it.

Alternativ ist auch eine Nachbearbeitung mit anderen Mitteln denkbar, so mittels einer Presse oder dergleichen, welche dann alternativ aus dem nabenartigen Gebilde den Flansch formt. Bevorzugt und einfach ist jedoch die Nachbearbeitung in derselben Aufspannung mit einer weiteren verformenden Rolle.Alternatively, a post-processing with other means is conceivable, so by means of a press or the like, which then alternatively forms the flange from the hub-like structure. Preferably, however, is the post-processing in the same setting with a further deforming role.

Zwar ist damit zur Ausbildung des Flansches 7 - anders als bei der gattungsgemäßen Ausbildung einer Nabe - ein weiterer Arbeitsgang erforderlich, nämlich die Nachbearbeitung des kegeligen Gebildes. Es ist aber derart überraschend möglich, unter Einsatz eines verformenden und nicht spanenden, kaltbearbeitenden Drückumformverfahrens präzise auch sehr flache Flansche an Metallronden auszubilden, deren Innendurchmesser kleiner ist als der Ausgangsdurchmesser der Metallronde 1.Although this is the formation of the flange 7 - unlike the generic training of a hub - another operation required, namely the post-processing of the conical structure. However, it is surprisingly possible, using a deforming and non-cutting, cold-working pressure-forming method, to precisely form very flat flanges on metal blanks whose inner diameter is smaller than the starting diameter of the metal blank 1.

Es ist alternativ auch denkbar, direkt vom Außenumfang her radial in das Werkstückeinzutauchen (wenn z. B. die axiale Erstreckung des Widerlagerfutters etwas geringer ist als die Dicke der Metallronde).Alternatively, it is also conceivable to dive radially into the workpiece directly from the outer circumference (if, for example, the axial extension of the abutment lining is somewhat smaller than the thickness of the metal blank).

Nach Fig. 1, nach welcher das Eintauchen etwas vom Außenumfang der Metallronde 1 nach innen hin versetzt erfolgt, ergibt sich der zusätzliche Vorteil, dass am Außenumfang der Metallronde 1 ein Bereich 8 verbleibt, der einer Weiterbearbeitung unterzogen werden kann, beispielweise, um eine Profilierung nach Art der Profilierung einer Riemenscheibe oder eine Verzahnung eines Starterkranzes oder dergleichen auszubilden (nicht dargestellt).According to Fig. 1, after which the immersion is offset slightly from the outer periphery of the metal blank 1 inwardly, there is the additional advantage that on the outer circumference of the metal blank 1 remains a region 8, which can be subjected to further processing, for example, to a profiling in the manner of profiling a pulley or a toothing of a starter ring or the like form (not shown).

Im Werkzeug 11 kann eine Kontur, z.B. eine Verzahnung, ausgebildet sein (im ersten oder einem weiteren zweiten Werkzeug), so dass der Flansch beim Drücken oder dgl. mit einer korrespondierenden Kontur (insbesondere einer Verzahnung 10) versehen wird.In the tool 11, a contour, e.g. a toothing, be formed (in the first or another second tool), so that the flange when pressing or the like. With a corresponding contour (in particular a toothing 10) is provided.

Fig. 5 zeigt einen nach dem erfindungsgemäßen Verfahren bearbeiteten Rohling 12 zur Herstellung eines Starterkranzes, der aus einer flachen Metallronde gefertigt wurde. Gut zu erkennen ist das Werkzeug 11 mit dem äußeren Widerlagerringabschnitt 13, einem aufgelegten (bzw. aufgedrückten) Ring 14 zum Niederhalten der relativ dünnen Metallronde 1 im äußeren Bereich und die Möglichkeit, die Metallronde zusätzlich auch zwischen dem äußeren Umfang und dem inneren Flansch abschnittsweise dünner oder dicker zu drücken und/oder in Richtung der Achse S kegelig und/oder gestuft gegen die entsprechend ausgebildete Werkzeugmatrize zu drücken.Fig. 5 shows a processed by the process according to the invention blank 12 for producing a starter ring, which was made of a flat metal blank. Good to see the tool 11 with the outer abutment ring portion 13, an applied (or imprinted) ring 14 for holding down the relatively thin metal blank 1 in the outer region and the possibility of the metal blank in addition also between the outer periphery and the inner flange sections thinner or to press thicker and / or in the direction of the axis S conical and / or stepped to press against the correspondingly formed tool die.

Dies kann mit der Drückrolle 3 oder einer weiteren Drückrolle oder der Niederhalterolle geschehen (angedeutet als Niederhalterolle 15). Hier wurde aus dem kegeligen Gebilde der Flansch in das Werkzeug 12 auf der der Bearbeitung mit der Drückrolle 3 gegenüberliegenden Seite hineingedrückt.This can be done with the spinning roller 3 or another spinning roller or the hold-down roller (indicated as hold-down roller 15). Here, the flange was pressed from the conical structure in the tool 12 on the opposite side of the processing with the spinning roller 3.

Würde in diesem Bereich eine Verzahnung (z.B. Radialverzahnung) im Werkzeug ausgebildet sein, würde zusätzlich im Flansch eine Verzahnung nach Art der Verzahnung 10 ausgebildet (in Fig. 5 nicht zu erkennen).If a toothing (eg radial toothing) were to be formed in the tool in this area, a toothing in the manner of the toothing 10 would additionally be formed in the flange (not visible in FIG. 5).

Bezugszeichenreference numeral

Metallrondemetal Ronde
11
Bohrungdrilling
22
Drückrollespinning roller
33
kegeliges Gebildeconical structure
44
AnstellrolleAnstellrolle
55
Drückrollespinning roller
66
Flanschflange
77
BereichArea
88th
Vorschubflankefeed edge
99
Verzahnunggearing
1010
WerkzeugTool
1111
Rohlingblank
1212
WiderlagerringabschnittAbutment ring section
1313
Ringring
1414
Höheheight
aa
Breitewidth
bb
Radienradii
R1, R2R1, R2
Dickethickness
dd
MittelsenkrechtePerpendicular bisector
SS
Winkelangle
αα

Claims (21)

  1. Method for producing a flange on a circular sheet-metal blank by means of at least one or more pressure rollers, having the following steps:
    a) a conically shaped structure (4) which tapers towards the mid-perpendicular (S) of the circular sheet-metal blank (1) is formed on the circular sheet-metal blank (1) by means of the at least one pressure roller (3) which is moved radially inwards,
    b) the axial thickness of the circular sheet-metal blank being reduced at least in regions over its radial extent,
    c) a flange (7) being formed on the circular sheet-metal blank (1) from the conical structure (4) by means of post-forming by axial pressing by means of a further pressure roller (5, 6) or by compressing, the axial extent or height of said flange (7) being smaller than its radial extent.
  2. Method according to Claim 1, characterized in that the radial extent of the flange (7) is more than two times, in particular more than three times as great as its axial extent.
  3. Method according to one of the preceding claims, characterized in that the axial extent of the flange (7) is only slightly greater than the thickness of the initial circular blank.
  4. Method according to one of the preceding claims, characterized in that the pressure roller in step "a" is first of all dipped into the circular sheet-metal blank and is then moved radially from the outside to the inside.
  5. Method according to one of the preceding claims, characterized in that the angle of attack (α) of the pressure roller (3) relative to the axial face of the circular sheet-metal blank (1) is greater than 90°.
  6. Method according to Claim 5, characterized in that the angle of attack (α) of the pressure roller (3) relative to the axial face of the circular sheet-metal blank (1) is greater than 110° and less than 170°.
  7. Method according to Claim 6, characterized in that the angle of attack (α) of the pressure roller (3) relative to the axial face of the circular sheet-metal blank is greater than 115° and less than 150°.
  8. Method according to one of the preceding claims, characterized in that, during the formation of the conical structure, at the same time a hold-down roller which can be set against it axially and/or radially also runs, in particular, on the side which lies opposite the pressure roller, which hold-down roller presses the circular sheet-metal blank down at least in regions in such a way that the latter is not raised up or arched by the die (11) in the region, in which the pressure roller (3) moves.
  9. Method according to one of the preceding claims, characterized in that the further pressure roller (5) dips axially into the conical structure (4) during the post-forming.
  10. Method according to one of the preceding claims, characterized in that the further pressure roller (6) dips radially into the conical structure (4) during the post-forming.
  11. Method according to one of the preceding claims, characterized in that the internal diameter of the circular sheet-metal blank (1) with the flange (7) after steps "a" and "b" is smaller than the internal diameter of the central hole (2) of the circular sheet-metal blank (1) in the initial workpiece.
  12. Method according to one of the preceding claims, characterized in that the circular metal-sheet blank (1) is penetrated in step "a" by a conically tapering mandrel.
  13. Method according to one of the preceding claims, characterized in that the circular metal-sheet blank (1) is held on its outer circumference by an abutment chuck.
  14. Method according to one of the preceding claims, characterized in that the circular metal-sheet blank (1) is additionally held down by a ring on its side which faces the pressure roller.
  15. Method according to one of the preceding claims, characterized in that the circular metal-sheet blank (1) is additionally held down adt least in regions by a hold-down roller on its which faces the pressure roller.
  16. Method according to one of the preceding claims, characterized in that the flange is formed on that side of the circular sheet-metal blank which faces away from the pressure roller.
  17. Method according to one of the preceding claims, characterized in that the flange is formed on that side of the circular sheet-metal blank which faces the pressure roller.
  18. Method according to one of the preceding claims, characterized in that the flange extends to both axial sides of the circular sheet-metal blank.
  19. Method according to one of the preceding claims, characterized in that the flange is pressed into a die having a contour, in particular a toothing system, with the result that the flange is provided with a corresponding contour, in particular a toothing system (10), on its side which faces the die.
  20. Method according to one of the preceding claims, characterized in that the die (11) rotates during the forming.
  21. Method according to one of the preceding claims, characterized in that the pressure rollers and/or the hold-down rollers are mounted rotatably.
EP04803144A 2003-11-17 2004-11-15 Method for the production of a flange on a circular sheet metal blank Not-in-force EP1697066B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10353750 2003-11-17
DE10358844A DE10358844B4 (en) 2003-11-17 2003-12-16 Method for producing a flange on a metal blank and gear part
PCT/EP2004/012924 WO2005046901A1 (en) 2003-11-17 2004-11-15 Method for the production of a flange on a metal blank, and transmission part

Publications (2)

Publication Number Publication Date
EP1697066A1 EP1697066A1 (en) 2006-09-06
EP1697066B1 true EP1697066B1 (en) 2008-01-02

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EP04803144A Not-in-force EP1697066B1 (en) 2003-11-17 2004-11-15 Method for the production of a flange on a circular sheet metal blank

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US (1) US7797976B2 (en)
EP (1) EP1697066B1 (en)
JP (1) JP5118852B2 (en)
KR (1) KR101151463B1 (en)
AT (1) ATE382441T1 (en)
CA (1) CA2546338C (en)
DE (1) DE502004005869D1 (en)
ES (1) ES2299891T3 (en)
WO (1) WO2005046901A1 (en)

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DE102005035519A1 (en) * 2005-07-25 2007-02-01 Wf-Maschinenbau Und Blechformtechnik Gmbh & Co Kg Method for forming a sheet metal blank
JP5415904B2 (en) * 2009-11-04 2014-02-12 日本スピンドル製造株式会社 Plastic processing equipment
DE102016205492A1 (en) * 2016-04-04 2017-10-05 Thyssenkrupp Ag Method and device for forming a semifinished product
CN107159768A (en) * 2017-07-13 2017-09-15 芜湖西诺普汽车零部件科技有限公司 A kind of nut board machining process and shovel rotation mould
JP2019171414A (en) * 2018-03-28 2019-10-10 アイシン・エィ・ダブリュ株式会社 Boss part molding method
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DE102010004932A1 (en) 2010-01-18 2011-07-21 WF-Maschinenbau und Blechformtechnik GmbH & Co. KG, 48324 Method for producing a rotationally symmetrical gear part and gear part

Also Published As

Publication number Publication date
JP5118852B2 (en) 2013-01-16
JP2007511370A (en) 2007-05-10
WO2005046901A1 (en) 2005-05-26
ES2299891T3 (en) 2008-06-01
US7797976B2 (en) 2010-09-21
CA2546338A1 (en) 2005-05-26
ATE382441T1 (en) 2008-01-15
CA2546338C (en) 2012-01-10
US20070256465A1 (en) 2007-11-08
KR101151463B1 (en) 2012-06-01
EP1697066A1 (en) 2006-09-06
DE502004005869D1 (en) 2008-02-14
KR20060126656A (en) 2006-12-08

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