EP0555631B1 - Method of making gearing parts with outwardly facing teeth - Google Patents

Method of making gearing parts with outwardly facing teeth Download PDF

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Publication number
EP0555631B1
EP0555631B1 EP19930100136 EP93100136A EP0555631B1 EP 0555631 B1 EP0555631 B1 EP 0555631B1 EP 19930100136 EP19930100136 EP 19930100136 EP 93100136 A EP93100136 A EP 93100136A EP 0555631 B1 EP0555631 B1 EP 0555631B1
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European Patent Office
Prior art keywords
toothed
tool
roller
curl
chain
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EP19930100136
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German (de)
French (fr)
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EP0555631A1 (en
EP0555631B2 (en
Inventor
Udo Friese
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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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Priority claimed from DE4205711A external-priority patent/DE4205711C3/en
Application filed by WF Maschinenbau und Blechformtecknik GmbH and Co KG filed Critical WF Maschinenbau und Blechformtecknik GmbH and Co KG
Publication of EP0555631A1 publication Critical patent/EP0555631A1/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
    • B21D53/00Making other particular articles
    • B21D53/26Making other particular articles wheels or the like
    • B21D53/28Making other particular articles wheels or the like gear wheels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21HMAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H5/00Making gear wheels, racks, spline shafts or worms
    • B21H5/02Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls

Definitions

  • the invention relates to a method for producing an externally toothed gear part according to the preamble of claim 1 and to an apparatus for performing the method.
  • Gear parts with external teeth are widely used, for example, as flywheels for manual transmissions or starters in motor vehicle construction. So far, such transmission parts were either made by z. B. the flywheels were formed in two parts. The flywheel washer was made from cold-formed sheet metal and the external teeth were formed in a separate ring by means of machining. The ring was then welded to the flywheel disc. This known arrangement has the disadvantage that it is expensive and that material changes due to the welding process entered in the flywheel that cannot be fully surveyed.
  • the external toothing is formed from an edge area of the same that is thickened relative to the sheet metal blank before it is formed, such that the cross section of the external toothing is larger than the cross section of a correspondingly long ring zone with the sheet thickness of the sheet metal blank.
  • the relevant edge area is thickened by means of suitable sheet metal forming methods, such as compression or the like, before the external toothing is formed, as a result of which structural changes are entered into the material. Since carbon steel is usually used for these gear parts, an inevitable hardening occurs, which is disadvantageous for the subsequent machining process.
  • the teeth are then formed by hammering in the teeth according to a method which also belongs to the prior art. This second-mentioned procedure has the further disadvantage that it can always happen that the tooth flanks are not sufficiently load-bearing, so that teeth can break under high loads.
  • the known arrangement has the disadvantage that the teeth are not only formed on the outside of the edge region of the circular blank, but also a tooth-like corrugation of this peripheral region to the interior of the circular blank, so that this results in circulation the wheel generates a considerable amount of noise.
  • a flywheel which consists of a pressed part, i.e. H. a preference is produced, wherein the teeth provided on the outside of an axially extending part are produced by rolling.
  • the drawing shows this component as if the inner ring of the teeth is smooth.
  • This method has the disadvantage that it is assumed that the wall thickness of the axially extending cylindrical region corresponds exactly to the wall thickness of the hub surface, so that either the base of the ring gear is too thin and too weak, so that the teeth break can, or the hub surface is too thick, so that there is a waste of material and an undesirable increase in weight.
  • a method for producing a gear wheel in which the toothed roller rotates around an axis which stands in the circumferential direction of the workpiece to be machined and in which the shaping work is broken down into a large number of individual shaping steps, i. H. the teeth are hammered into the edge of the workpiece so that structural damage occurs, i. H. the fiber grain of the metal is destroyed and breaks can occur later.
  • This known method therefore essentially requires five consecutive, absolutely necessary essential processing steps, the forces to be used for the collapse being considerable, so that large mechanical expenditure is required.
  • the invention has for its object to provide a method with which, starting from a round blank without material hardening, a thickening of the edge region of the round blank is achieved when producing the teeth.
  • a border is provided in the edge region of the round blank, ie a simple bending over of the round region intended for this purpose, so that no structural changes occur.
  • the teeth are then pressed into this flattened area of the starting component via a form roller designed as a toothed roller, a change in the structure of the material of the starting component only occurring at this time.
  • a device for the manufacture of such a transmission part, which is essentially characterized in that two synchronously driven shafts are provided, one shaft carrying the receiving spindle for the tool and the attachment and the other shaft the form roller, whereby these two shafts are synchronized by a chain drive.
  • This makes it possible to use only one drive motor, and previous attempts to achieve synchronous running between a tool and a form roller by means of an electronic circuit have not been successful with the high forces that occur here.
  • the deflection and tensioning rollers can also be adjusted in position on the slide by means of adjusting screws, so that this makes it possible to adjust the individual deflection and tensioning rollers by means of the adjusting screws, which gives the possibility of precisely aligning the toothed roller to the tool. In other words, it is achieved that the sprocket regardless of Can adjust the slide and its position independently of the tool and thus align it with the tool.
  • a metal blank is shown at 1, which is fixed between a tool 2 and a front 3.
  • the tool has a receiving space 7.
  • a bordering roller 4 which has a central rounded area and two counter-holder disks 4a and 4b attached to it.
  • the bordering roller 4 has moved towards the tool part and in the process has bordered the metal blank 1, so that the bordering 6 has been created.
  • the bordering roller 4 is replaced by a toothed roller 5, which functions as a shaping roller and has a central region which has teeth on its outer circumference, a receiving space 8 being additionally created by the counter-holding discs 5a and 5b.
  • a tooth 9 of the toothed roller 5 can be seen in FIG. 3.
  • 12 denotes the hub surface of a starter gear, this hub surface having a thickness a .
  • the ring gear in this component is formed by the teeth 10 and the continuous base 11, the thickness of the base 11 corresponding at least to the thickness of the hub surface 12.
  • Fig. 6 shows Fig. 3 corresponding to an output part, for example a metal blank, the border is not semicircular as shown in Fig. 3, but is only slightly bent, so then the same result is achieved when the sprocket shown in Fig. 4 is activated as shown in Fig. 4.
  • the starting product required for producing the transmission part according to FIG. 5 is a preference 16
  • this preference 16 in addition to a border 17 has a flange 18 which extends in the axial direction of the hub surface and which can later be provided with so-called transmitter holes if this transmission part is used in motor vehicle construction in the area of the starter.
  • the preference 16 must be pressed and then this component has to be reclamped and clamped onto a molding machine, the great advantage is nevertheless achieved that the required flange 18 for receiving the transmitter holes can be made in one piece with the hub surface of the gear part.
  • the ring gear is formed by infeed of a toothed roller 20, the border 17 then being pressed into the receiving space 1a of the tool and 8a of the toothed roller 20.
  • a device is shown schematically, in which a shaft 22 can be seen, which carries the receiving spindle for the tool in its upper region.
  • the shaft 22 carries a sprocket 23 in the lower region.
  • a carriage 21 can be seen which carries a shaft 24 which carries the toothed roller in its upper area, while a chain wheel 25 can be seen in the lower area.
  • the two sprockets 23 and 25 are connected to one another by a chain 26 which is guided, inter alia, by deflection and tensioning rollers 27 and 28 which are rotatably mounted on a carriage 29.
  • This carriage 29 can advance and over a hydraulic piston-cylinder arrangement and are moved back, with a corresponding movement of the slide 21, which can be adjusted by means of a mechanical device, not shown, a corresponding re-tensioning of the chain 26 by the hydraulic piston-cylinder arrangement 30.
  • the two shafts 22 and 24 can be driven by a motor and absolute synchronous operation is achieved despite the high pressures that occur.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)
  • Forging (AREA)

Description

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung eines außen verzahnten Getriebeteiles gemäß dem Oberbegriff des Patentanspruches 1 und auf eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for producing an externally toothed gear part according to the preamble of claim 1 and to an apparatus for performing the method.

Außenverzahnte Getriebeteile sind z.B. als Schwungräder für Schaltgetriebe oder Anlasser im Kraftfahrzeugbau in großem Umfang im Einsatz. Bisher wurden derartige Getriebeteile entweder dadurch hergestellt, daß z. B. die Schwungräder zweiteilig ausgebildet waren. Hierbei wurde die Schwungradscheibe aus kaltverformtem Blech hergestellt und die Außenverzahnung in einem gesonderten Ring mittels spanabhebender Formung gebildet. Der Ring wurde dann an der Schwungradscheibe angeschweißt. Diese bekannte Anordnung hat den Nachteil, daß sie kostenaufwendig ist und daß durch das Schweißverfahren Materialveränderungen in das Schwungrad eingetragen werden, die nicht voll zu überblicken sind.Gear parts with external teeth are widely used, for example, as flywheels for manual transmissions or starters in motor vehicle construction. So far, such transmission parts were either made by z. B. the flywheels were formed in two parts. The flywheel washer was made from cold-formed sheet metal and the external teeth were formed in a separate ring by means of machining. The ring was then welded to the flywheel disc. This known arrangement has the disadvantage that it is expensive and that material changes due to the welding process entered in the flywheel that cannot be fully surveyed.

Um das Gesamtgewicht eines Getriebeteiles bei ausreichender Festigkeit sowohl im Scheibenbereich als auch im Bereich der Außenverzahnung herabzusetzen, ist bereits in der EP-0 333 917 A2 vorgeschlagen worden, daß die Außenverzahnung aus einem vor deren Formung gegenüber dem Blechrohling verdickten Randbereich desselben gebildet ist, derart, daß der Querschnitt der Außenverzahnung größer ist als der Querschnitt einer entsprechend langen Ringzone mit der Blechstärke des Blechrohlings.In order to reduce the total weight of a gear part with sufficient strength both in the disc area and in the area of the external toothing, it has already been proposed in EP-0 333 917 A2 that the external toothing is formed from an edge area of the same that is thickened relative to the sheet metal blank before it is formed, such that the cross section of the external toothing is larger than the cross section of a correspondingly long ring zone with the sheet thickness of the sheet metal blank.

Hierzu wird vor der Formung der Außenverzahnung der betreffende Randbereich mittels geeigneter Blechverformungsverfahren, wie Stauchung od. dgl. verdickt, wodurch Gefügeänderungen in das Material eingetragen werden. Da für diese Getriebeteile üblicherweise Kohlenstoffstahl eingesetzt wird, tritt eine zwangsläufige Härtung ein, die für das nachfolgende Bearbeitngsverfahren nachteilig ist. Die Ausbildung der Zähne wird bei dieser Ausführungsform dann durch ein Einhämmern der Zähne nach einem ebenfalls zum Stand der Technik gehörenden Verfahren durchgeführt. Diese zweitgenannte Verfahrensweise hat weiterhin den Nachteil, daß es immer wieder vorkommen kann, daß die Zahnflanken nicht ausreichend tragfähig sind, so daß bei hohen Belastungen ein Brechen der Zähne auftreten kann. Außerdem hat die bekannte Anordnung den Nachteil, daß die Zähne nicht nur auf der Außenseite des Randbereiches der Ronde ausgebildet sind, sondern auch nach hinten zum Innenraum der Ronde eine zahnartige Wellung dieses Randbereiches erfolgt, so daß hierdurch bei Umlauf des Rades eine ganz erhebliche Geräuschentwicklung eintritt.For this purpose, the relevant edge area is thickened by means of suitable sheet metal forming methods, such as compression or the like, before the external toothing is formed, as a result of which structural changes are entered into the material. Since carbon steel is usually used for these gear parts, an inevitable hardening occurs, which is disadvantageous for the subsequent machining process. In this embodiment, the teeth are then formed by hammering in the teeth according to a method which also belongs to the prior art. This second-mentioned procedure has the further disadvantage that it can always happen that the tooth flanks are not sufficiently load-bearing, so that teeth can break under high loads. In addition, the known arrangement has the disadvantage that the teeth are not only formed on the outside of the edge region of the circular blank, but also a tooth-like corrugation of this peripheral region to the interior of the circular blank, so that this results in circulation the wheel generates a considerable amount of noise.

Aus der EP-0 140 576 A1 ist ein Schwungrad bekanntgeworden, das aus einem Preßteil, d. h. einem Vorzug, hergestellt wird, wobei die an der Außenseite eines sich axial erstreckenden Teiles vorgesehenen Zähne durch Walzen hergestellt werden. Die Zeichnung zeigt dieses Bauteil so, als ob der Innenkranz der Zähne glatt ausgebildet ist. Dieses Verfahren hat den Nachteil, daß von einem Vorzug ausgegangen wird, wobei die Wandstärke des sich axial erstreckenden zylindrischen Bereiches genau der Wandstärke der Nabenfläche entspricht, so daß entweder der Fußkranz des Zahnkranzes zu dünn und zu schwach ist, so daß ein Brechen der Zähne eintreten kann, oder aber die Nabenfläche ist zu dick, so daß hier eine Materialverschwendung und eine unerwünschte Gewichtserhöhung eintritt.From EP-0 140 576 A1 a flywheel has become known which consists of a pressed part, i.e. H. a preference is produced, wherein the teeth provided on the outside of an axially extending part are produced by rolling. The drawing shows this component as if the inner ring of the teeth is smooth. This method has the disadvantage that it is assumed that the wall thickness of the axially extending cylindrical region corresponds exactly to the wall thickness of the hub surface, so that either the base of the ring gear is too thin and too weak, so that the teeth break can, or the hub surface is too thick, so that there is a waste of material and an undesirable increase in weight.

Aus der DE-40 06 582 A1 ist ein Verfahren zur Herstellung eines Zahnrades bekannt, bei welchem die Zahnrolle um eine Achse umläuft, die in Umfangsrichtung des zu bearbeitenden Werkstückes steht und bei welchem die Umformarbeit in eine Vielzahl von Einzelumformschritten aufgelöst ist, d. h. die Zähne werden in den Rand des Werkstückes eingehämmert, so daß eine Gefügezerstörung auftritt, d. h. der Faserverlauf des Metalls wird zerstört und hier können später Brüche auftreten.From DE-40 06 582 A1 a method for producing a gear wheel is known, in which the toothed roller rotates around an axis which stands in the circumferential direction of the workpiece to be machined and in which the shaping work is broken down into a large number of individual shaping steps, i. H. the teeth are hammered into the edge of the workpiece so that structural damage occurs, i. H. the fiber grain of the metal is destroyed and breaks can occur later.

Auch bei der Verfahrensweise gemäß der DE-39 32 823 C1 werden die Zähne in eine axiale Fläche eingedrückt, deren Stärke der Wandstärke der Nabenfläche entspricht.In the procedure according to DE-39 32 823 C1, the teeth are pressed into an axial surface, the thickness of which is the wall thickness of the hub surface corresponds.

Aus der FR-A-24 95 508 ist ein Verfahren zur Herstellung von Riemenscheiben oder Poly-V-Scheiben bekanntgeworden, bei welchem eine Metallronde in einem ersten Verfahrensschritt tiefgepreßt wird, so daß ein topfartiges Preßteil erzielt wird. Dieses Preßteil weist im Bereich der Nabenfläche und im Bereich der sich koaxial, d. h. im wesentlichen senkrecht zur Nabenfläche erstreckenden zylindrischen Fläche die gleiche Wandstärke auf. Anschließend ist es erforderlich, den Randbereich der gebildeten zylindrischen Flächen fein zu bearbeiten. Als nächster Verfahrensschritt schließt sich ein sogenanntes "Kollapsen" der zylindrischen Randfläche an. Durch dieses "Kollapsen" wird die zylindrische Randfläche durch Verformung in ihrer Höhe reduziert, wobei gleichzeitig der Randbereich zwischen der Nabenfläche und der zylindrischen Fläche eingefaltet wird. Der so kollapste Randbereich wird dann über eine Zudrückrolle umgeformt und zusammengedrückt.From FR-A-24 95 508 a process for the production of pulleys or poly-V pulleys has become known, in which a metal blank is deep-pressed in a first process step, so that a pot-like pressed part is achieved. This pressed part has in the area of the hub surface and in the area of the coaxial, d. H. the cylindrical wall extending substantially perpendicular to the hub surface has the same wall thickness. Then it is necessary to finely work the edge area of the cylindrical surfaces formed. The next step in the process is a so-called "collapse" of the cylindrical edge surface. This "collapse" reduces the height of the cylindrical edge surface by deformation, at the same time the edge region between the hub surface and the cylindrical surface is folded in. The edge region collapsed in this way is then formed and compressed by means of a pressure roller.

Dieses bekannte Verfahren benötigt also im wesentlichen fünf aufeinanderfolgende, unbedingt erforderliche wesentliche Bearbeitungsschritte, wobei die für das Kollapsen aufzuwendenden Kräfte erheblich sind, so daß große maschinelle Aufwendungen erforderlich sind.This known method therefore essentially requires five consecutive, absolutely necessary essential processing steps, the forces to be used for the collapse being considerable, so that large mechanical expenditure is required.

In der gattungsbildenden EP-A-343 314 wird ein Verfahren zur Herstellung einer Riemenscheibe beschrieben, bei der eine Metallronde in ihrem Umfangsbereich bordiert und anschließend die Bordierung zur Bildung einer Auflagefläche flachgedrückt wird, wobei dann in die so gebildete Auflagefläche in Umfangsrichtung verlaufende Nuten eingearbeitet werden oder es ist auch möglich, Querverzahnungen in diese Auflagefläche einzubringen, so daß eine querverzahnte Riemenscheibe erstellt wird. Da der Werkstoff der Bordierung aber zur Bildung der Auflagefläche bereits verdichtet ist, sind besondere Anforderungen an die Herstellung der Verzahnung gestellt, d. h. die Verzahnung wird in ein verdichtetes Metallteil eingebracht.In the generic EP-A-343 314 a method for producing a pulley is described in which a metal blank borders in its peripheral area and then the border to form a bearing surface is flattened, in which case circumferential grooves are then incorporated into the support surface thus formed, or it is also possible to introduce transverse toothings into this support surface, so that a cross-toothed pulley is created. However, since the material of the border is already compressed to form the contact surface, special requirements are placed on the production of the toothing, ie the toothing is introduced into a compressed metal part.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zu schaffen, mit welchem ausgehend von einer Ronde ohne Materialverhärtung eine Verdickung des Randbereiches der Ronde beim Herstellen der Zähne erzielt wird.The invention has for its object to provide a method with which, starting from a round blank without material hardening, a thickening of the edge region of the round blank is achieved when producing the teeth.

Diese der Erfindung zugrundeliegende Aufgabe wird durch die Lehre des unabhängigen Anspruches 1 gelöst.This object on which the invention is based is achieved by the teaching of independent claim 1.

Mit anderen Worten ausgedrückt wird bei dem erfindungsgemäß vorgeschlagenen Arbeitsverfahren im Randbereich der Ronde eine Bordierung vorgesehen, d. h. ein einfaches Umbiegen des hierzu bestimmten Rondenbereiches, so daß keine Gefügeveränderungen eintreten. Anschließend werden über eine als Zahnrolle ausgebildete Formrolle in diesen bordierten Bereich des Ausgangsbauteiles die Zähne eingedrückt, wobei erst zu diesem Zeitpunkt eine Gefügeveränderung im Material des Ausgangsbauteiles eintritt.In other words, in the working method proposed according to the invention, a border is provided in the edge region of the round blank, ie a simple bending over of the round region intended for this purpose, so that no structural changes occur. The teeth are then pressed into this flattened area of the starting component via a form roller designed as a toothed roller, a change in the structure of the material of the starting component only occurring at this time.

Praktische Versuche haben gezeigt, daß es ohne weiteres möglich ist, durch diese beiden Arbeitsverfahren ein außen verzahntes Getriebeteil zu schaffen, dessen Nabenfläche relativ dünnwandig ist und dessen sich senkrecht zur Nabenfläche erstreckender Randbereich, der den Zahnkranz aufnimmt, eine solche Stärke aufweist, daß die Zähne die ausreichende Höhe und der Fußkranz des Zahnkranzes die ausreichende Festigkeit aufweist.Practical tests have shown that it is readily possible to use these two working methods to create an externally toothed gear part, the hub surface of which is relatively thin-walled and the edge region which extends perpendicularly to the hub surface and which receives the ring gear has such a thickness that the teeth the sufficient height and the base of the ring gear has sufficient strength.

Zur Herstellung eines solchen Getriebeteiles wird dann gemäß der Erfindung eine Vorrichtung vorgeschlagen, die sich im wesentlichen dadurch kennzeichnet, daß zwei synchron angetriebene Wellen vorgesehen sind, wobei die eine Welle die Aufnahmespindel für das Werkzeug und den Vorsetzer trägt und die andere Welle die Formrolle, wobei die Synchronisierung dieser beiden Wellen durch einen Kettentrieb erfolgt. Hierdurch ist der Einsatz nur eines Antriebsmotors möglich, und die bisherigen Versuche, einen Synchronlauf zwischen einem Werkzeug und einer Formrolle durch elektronische Schaltung zu erreichen, hat sich bei den hohen, hier auftretenden Kräften nicht bewährt.For the manufacture of such a transmission part, a device is then proposed according to the invention, which is essentially characterized in that two synchronously driven shafts are provided, one shaft carrying the receiving spindle for the tool and the attachment and the other shaft the form roller, whereby these two shafts are synchronized by a chain drive. This makes it possible to use only one drive motor, and previous attempts to achieve synchronous running between a tool and a form roller by means of an electronic circuit have not been successful with the high forces that occur here.

Die Umlenk- und Spannrollen sind außerdem zusätzlich auf dem Schlitten durch Stellschrauben in ihrer Lage einstellbar, so daß dadurch ein Verstellen der einzelnen Umlenk- und Spannrollen durch die Stellschrauben möglich wird, woraus sich die Möglichkeit ergibt, die Zahnrolle zum Werkzeug exakt auszurichten. Mit anderen Worten ausgedrückt wird dadurch erreicht, daß man die Zahnrolle unabhängig vom Schlitten und unabhängig vom Werkzeug in ihrer Drehstellung einstellen kann und damit auf das Werkzeug ausrichten kann.The deflection and tensioning rollers can also be adjusted in position on the slide by means of adjusting screws, so that this makes it possible to adjust the individual deflection and tensioning rollers by means of the adjusting screws, which gives the possibility of precisely aligning the toothed roller to the tool. In other words, it is achieved that the sprocket regardless of Can adjust the slide and its position independently of the tool and thus align it with the tool.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnungen erläutert.Embodiments of the invention are explained below with reference to the drawings.

Die Zeichnungen zeigen dabei in den

Fig. 1 bis 4
die Herstellung eines außen verzahnten Getriebeteiles aus einer Metallronde,
Fig. 5
das erzielte Getriebeteil,
Fig. 6
eine abgeänderte Möglichkeit zur Erzielung der Bordierung,
Fig. 7
den Einsatz einer Zahnrolle in Verbindung mit einem eine Bordierung aufweisenden Vorzug und in
Fig. 8
schematisch die Anordnung der Synchronisation des Werkzeuges und der Formrolle.
The drawings show in the
1 to 4
the production of an externally toothed gear part from a metal blank,
Fig. 5
the achieved gear part,
Fig. 6
a modified way to get the boarding,
Fig. 7
the use of a toothed roller in connection with a preference with a border and in
Fig. 8
schematically the arrangement of the synchronization of the tool and the form roller.

In Fig. 1 ist bei 1 eine Metallronde dargestellt, die zwischen einem Werkzeug 2 und einem Vorsetzer 3 festgelegt ist. Das Werkzeug weist einen Aufnahmeraum 7 auf.In Fig. 1, a metal blank is shown at 1, which is fixed between a tool 2 and a front 3. The tool has a receiving space 7.

Oberhalb der Metallronde 1 ist eine Bordierrolle 4 dargestellt, die einen mittleren abgerundeten Bereich und zwei an diesem befestigte Gegenhalterscheiben 4a und 4b aufweist.Above the metal blank 1, a bordering roller 4 is shown, which has a central rounded area and two counter-holder disks 4a and 4b attached to it.

Bei der in Fig. 2 dargestellten Anordnung hat sich die Bordierrolle 4 auf das Werkzeugteil zubewegt und dabei die Metallronde 1 bordiert, so daß die Bordierung 6 entstanden ist.In the arrangement shown in FIG. 2, the bordering roller 4 has moved towards the tool part and in the process has bordered the metal blank 1, so that the bordering 6 has been created.

Bei der Darstellung in Fig. 3 ist die Bordierrolle 4 durch eine Zahnrolle 5 ersetzt, die als Formrolle arbeitet und einen mittleren Bereich aufweist, der an seinem Außenumfang Zähne aufweist, wobei zusätzlich durch die Gegenhalterscheiben 5a und 5b ein Aufnahmeraum 8 geschaffen wird. In Fig. 3 ist ein Zahn 9 der Zahnrolle 5 erkennbar.In the illustration in FIG. 3, the bordering roller 4 is replaced by a toothed roller 5, which functions as a shaping roller and has a central region which has teeth on its outer circumference, a receiving space 8 being additionally created by the counter-holding discs 5a and 5b. A tooth 9 of the toothed roller 5 can be seen in FIG. 3.

Durch weiteres Zustellen der Zahnrolle 5, so wie dies in Fig. 4 dargestellt ist, wird nunmehr die Bordierung 6 in dem durch den Aufnahmeraum 7, den Aufnahmeraum 8 und den Zwischenraum zwischen den Zähnen 9 gebildeten Raum hineingepreßt, so daß dadurch der umlaufende Zahnkranz gebildet wird, so wie dies Fig. 5 der Zeichnungen zeigt.By further feeding the toothed roller 5, as shown in Fig. 4, the border 6 is now pressed into the space formed by the receiving space 7, the receiving space 8 and the space between the teeth 9, so that the circumferential ring gear is thereby formed 5, as shown in Fig. 5 of the drawings.

In Fig. 5 ist mit 12 die Nabenfläche eines Anlasserzahnrades bezeichnet, wobei diese Nabenfläche eine Dicke a aufweist. Der Zahnkranz in diesem Bauteil wird durch die Zähne 10 und den durchgehenden Fußkranz 11 gebildet, wobei die Stärke des Fußkranzes 11 mindestens der Stärke der Nabenfläche 12 entspricht.In Fig. 5, 12 denotes the hub surface of a starter gear, this hub surface having a thickness a . The ring gear in this component is formed by the teeth 10 and the continuous base 11, the thickness of the base 11 corresponding at least to the thickness of the hub surface 12.

Fig. 6 zeigt Fig. 3 entsprechend ein Ausgangsteil, beispielsweise eine Metallronde, deren Bordierung nicht halbkreisförmig wie in Fig. 3 dargestellt ausgebildet ist, sondern die lediglich etwas angebogen ist, so dann bei Tätigwerden der in Fig. 4 dargestellten Zahnrolle dasselbe Ergebnis erzielt wird wie in Fig. 4 dargestellt.Fig. 6 shows Fig. 3 corresponding to an output part, for example a metal blank, the border is not semicircular as shown in Fig. 3, but is only slightly bent, so then the same result is achieved when the sprocket shown in Fig. 4 is activated as shown in Fig. 4.

In Fig. 7 ist das zur Herstellung des Getriebeteiles gemäß Fig. 5 erforderliche Ausgangsprodukt ein Vorzug 16, wobei dieser Vorzug 16 neben einer Bordierung 17 einen sich in axialer Richtung der Nabenfläche erstreckenden Flansch 18 aufweist, der später mit sogenannten Geberlöchern versehen werden kann, wenn dieses Getriebeteil im Kraftfahrzeugbau im Bereich des Anlassers eingesetzt wird. Obgleich bei dem in Fig. 7 dargestellten Bauteil die Notwendigkeit eines zweistufigen Verfahrens besteht, nämlich in einem ersten Arbeitsverfahren muß der Vorzug 16 gedrückt werden und dann muß dieses Bauteil umgespannt werden und auf eine Formmaschine aufgespannt werden, wird trotzdem der große Vorteil erreicht, daß der für die Aufnahme der Geberlöcher erforderliche Flansch 18 einteilig mit der Nabenfläche des Getriebeteiles hergestellt werden kann. Auch in diesem Fall wird nach Aufspannen des Vorzuges 16, so wie in Fig. 7 dargestellt, der Zahnkranz durch Zustellen einer Zahnrolle 20 gebildet, wobei sich die Bordierung 17 dann in den Aufnahmeraum 1a des Werkzeuges und 8a der Zahnrolle 20 einpreßt.In FIG. 7, the starting product required for producing the transmission part according to FIG. 5 is a preference 16, this preference 16 in addition to a border 17 has a flange 18 which extends in the axial direction of the hub surface and which can later be provided with so-called transmitter holes if this transmission part is used in motor vehicle construction in the area of the starter. Although there is a need for a two-stage method in the component shown in FIG. 7, namely in a first working method the preference 16 must be pressed and then this component has to be reclamped and clamped onto a molding machine, the great advantage is nevertheless achieved that the required flange 18 for receiving the transmitter holes can be made in one piece with the hub surface of the gear part. In this case too, after the preference 16 has been clamped, as shown in FIG. 7, the ring gear is formed by infeed of a toothed roller 20, the border 17 then being pressed into the receiving space 1a of the tool and 8a of the toothed roller 20.

In Fig. 8 ist eine Vorrichtung schematisch dargestellt, bei der eine Welle 22 erkennbar ist, die an ihrem oberen Bereich die Aufnahmespindel für das Werkzeug trägt. Im unteren Bereich trägt die Welle 22 ein Kettenrad 23.In Fig. 8, a device is shown schematically, in which a shaft 22 can be seen, which carries the receiving spindle for the tool in its upper region. The shaft 22 carries a sprocket 23 in the lower region.

Weiterhin ist ein Schlitten 21 erkennbar, der eine Welle 24 trägt, die in ihrem oberen Bereich die Zahnrolle trägt, während im unteren Bereich ein Kettenrad 25 erkennbar ist. Die beiden Kettenräder 23 und 25 werden über eine Kette 26 miteinander verbunden, die u. a. über Umlenk- und Spannrollen 27 und 28 geführt ist, die auf einem Schlitten 29 drehbar gelagert sind. Dieser Schlitten 29 kann über eine hydraulische Kolben-Zylinderanordnung vor- und und zurückbewegt werden, wobei bei entsprechender Bewegung des Schlittens 21, der über eine nicht dargestellte mechanische Einrichtung verstellt werden kann, ein entsprechendes Nachspannen der Kette 26 durch die hydraulische Kolben-Zylinderanordnung 30 erfolgt. Hierdurch ist der Antrieb der beiden Wellen 22 und 24 über einen Motor möglich und es wird ein absoluter Synchronlauf trotz der hohen auftretenden Drücke erreicht.Furthermore, a carriage 21 can be seen which carries a shaft 24 which carries the toothed roller in its upper area, while a chain wheel 25 can be seen in the lower area. The two sprockets 23 and 25 are connected to one another by a chain 26 which is guided, inter alia, by deflection and tensioning rollers 27 and 28 which are rotatably mounted on a carriage 29. This carriage 29 can advance and over a hydraulic piston-cylinder arrangement and are moved back, with a corresponding movement of the slide 21, which can be adjusted by means of a mechanical device, not shown, a corresponding re-tensioning of the chain 26 by the hydraulic piston-cylinder arrangement 30. As a result, the two shafts 22 and 24 can be driven by a motor and absolute synchronous operation is achieved despite the high pressures that occur.

Mit 31 und 32 sind in Fig. 8 zwei Stellschrauben angedeutet, mit denen es möglich ist, unabhängig von der Verstellung des Schlittens 29, die Umlenk- und Spannrollen 27 und 28 in ihrer Dreheinstellung zu regulieren, so daß dadurch exakte Ausrichtungen der Zahnrolle zum Werkzeug möglich sind.With 31 and 32 two adjusting screws are indicated in Fig. 8, with which it is possible, regardless of the adjustment of the carriage 29, to regulate the deflection and tensioning rollers 27 and 28 in their rotational setting, so that thereby exact alignments of the sprocket to the tool possible are.

Claims (5)

  1. A method of producing an externally toothed precision gear member from a circular metal blank (1) with a hub face (12) and a surrounding toothed rim formed of a base rim (11) and teeth (10) projecting outwardly thereon, which toothed rim extends substantially perpendicularly to the hub face (12), the circular metal blank (1) being curled in its circumferential area and the curl (6, 17) then being pressed flat in a receiving space (7) of a tool (2) and provided with teeth (10), characterized in that the curl (6, 17) is pressed flat with simultaneous tooth (10) formation in a receiving space (8) of a tooth roller (5), i.e. is formed without cutting.
  2. A method according to claim 1, characterized in that a first draw (16) is produced from the circular metal blank, said first draw (16) comprising a curl (17) and a flange (18) adjacent thereto and extending substantially perpendicularly to the hub face (12).
  3. A method according to claim 1 or claim 2, characterized in that the curl (6, 17) is effected by means of a forming roller constructed as a toothed roller (5, 20).
  4. A device for producing an externally toothed gear member, profiling being effected, after infeed of at least one toothed roller, by means of the latter with simultaneous flattening of a curl by compression, a tool (2, 2a) being arranged stationarily on a receiving spindle, the toothed roller (5, 20) being arranged on a carriage (21) which is movable towards the tool (2), the receiving spindle which carries the tool comprising a chain wheel (23) and the shaft (24), which drives the toothed roller (5, 20) through the intermediate connection of a gear in the same direction of rotation as the tool, carrying a chain wheel (25), said chain wheels being connected via a chain (26), two deflecting and tensioning rollers (27, 28) being inserted in this chain (26) and accommodated on a carriage (29) and being adjustable with respect to the carriage (21) carrying the shaft (24) via a hydraulic piston/cylinder arrangement (30) and acting as a chain adjuster.
  5. A device according to claim 4, characterized by adjusting screws (31, 32) enabling adjustment of the tensioning rollers (27, 28).
EP19930100136 1992-02-13 1993-01-07 Method of making gearing parts with outwardly facing teeth Expired - Lifetime EP0555631B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4204248 1992-02-13
DE4204248 1992-02-13
DE4205711A DE4205711C3 (en) 1992-02-13 1992-02-25 Device for producing an externally toothed gear part
DE4205711 1992-02-25

Publications (3)

Publication Number Publication Date
EP0555631A1 EP0555631A1 (en) 1993-08-18
EP0555631B1 true EP0555631B1 (en) 1996-04-03
EP0555631B2 EP0555631B2 (en) 1998-12-23

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Application Number Title Priority Date Filing Date
EP19930100136 Expired - Lifetime EP0555631B2 (en) 1992-02-13 1993-01-07 Method of making gearing parts with outwardly facing teeth

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EP (1) EP0555631B2 (en)
CA (1) CA2086043C (en)
DE (1) DE4244720A1 (en)
ES (1) ES2086139T3 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE19850740A1 (en) * 1998-09-09 2000-03-23 Wf Maschinenbau Blechformtech Transmission parts, especially gears, production from round metal blanks uses pressure rollers to press blanks to reduce thickness and increase external diameter

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Publication number Priority date Publication date Assignee Title
JPH0966330A (en) * 1995-08-31 1997-03-11 Fuji Kiko Co Ltd Method for thickening outer part of disk and method for forming disk member with drive part on outer periphery
JP3840264B2 (en) * 1996-08-14 2006-11-01 ヴェーエフ・マシーネンバウ ウント ブレヒフォルムテヒニク ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト Method and apparatus for manufacturing external gear parts of transmission
DE102005043498A1 (en) * 2005-09-12 2007-03-15 Rollwalztechnik Abele + Höltich GmbH Mechanism advancing two tools against workpiece being processed, e.g. thread rolling machine, includes tool with rigid connection to drive
CN106001230A (en) * 2016-05-31 2016-10-12 安徽赛爵机械制造有限公司 Forming technology of belt wheel for compound shock absorber

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US3436801A (en) * 1966-06-23 1969-04-08 Pig Design Corp Method of making geared pulley to eliminate burrs in pulley groove and to facilitate entry of belt into pulley
DE2439690A1 (en) * 1974-08-19 1976-03-04 Emil Siegwart METHOD FOR MANUFACTURING GEARS, GEAR SEGMENTS OR THE SAME FROM METAL SHEET AND DEVICE FOR CARRYING OUT THE PROCESS
CA1094356A (en) * 1977-02-04 1981-01-27 Drive Manufacturing Inc. Method of pulley manufacture and product
ES2046368T3 (en) * 1989-05-17 1994-02-01 Leifeld Gmbh & Co. PROCEDURE FOR THE MANUFACTURE OF A PULLEY.
DE3932823C1 (en) * 1989-09-30 1990-12-06 Wf-Maschinenbau Und Blechformtechnik Gmbh & Co Kg, 4415 Sendenhorst, De Toothed transmission component mfr. - involves tool with external teeth forming inside teeth on workpiece
DE4205711C3 (en) * 1992-02-13 2000-02-24 Wf Maschinenbau Blechformtech Device for producing an externally toothed gear part

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19850740A1 (en) * 1998-09-09 2000-03-23 Wf Maschinenbau Blechformtech Transmission parts, especially gears, production from round metal blanks uses pressure rollers to press blanks to reduce thickness and increase external diameter

Also Published As

Publication number Publication date
EP0555631A1 (en) 1993-08-18
DE4244720A1 (en) 1994-03-03
EP0555631B2 (en) 1998-12-23
CA2086043C (en) 2004-12-28
CA2086043A1 (en) 1993-08-14
ES2086139T3 (en) 1996-06-16

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