EP0343314B1 - Method of making a pulley - Google Patents
Method of making a pulley Download PDFInfo
- Publication number
- EP0343314B1 EP0343314B1 EP19890100057 EP89100057A EP0343314B1 EP 0343314 B1 EP0343314 B1 EP 0343314B1 EP 19890100057 EP19890100057 EP 19890100057 EP 89100057 A EP89100057 A EP 89100057A EP 0343314 B1 EP0343314 B1 EP 0343314B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing surface
- hub
- ronde
- metal
- pulley
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/26—Making other particular articles wheels or the like
- B21D53/261—Making other particular articles wheels or the like pulleys
Definitions
- the invention relates to a method according to the preamble of the main claim.
- This known method therefore essentially requires five successive, absolutely essential, essential processing steps, the forces to be used for the "collapse" being considerable, so that large mechanical expenditure is required to absorb these high pressures.
- the invention has for its object to simplify the generic method in such a way that, despite less mechanical effort, the cylindrical peripheral surface formed, which is also referred to as the contact surface, has a greater wall thickness than the actual hub surface.
- This object on which the invention is based is achieved in that the metal blank is flanged in a first process step in a departure from the previous method of operation and then the flanging is flattened to form the contact surface.
- This mode of operation eliminates the processing of the formed that was previously required in the prior art Edge avoided and instead of the deep-drawing press producing a pot-like body, a simple border roller is used.
- a metal blank 1 is shown, which is clamped between two chuck jaws 4 and 5 according to FIG. 1.
- a squeeze roller 7 is shown and when the squeeze roller 7 is fed onto the border 2, the end product shown in FIG. 4 is reached, namely a support surface 3 which has a greater thickness than the hub surface 8 of the metal blank 1.
- Grooves running in the circumferential direction can be incorporated into the bearing surface thus formed, so that, for example, a poly-V pulley is formed or it is also possible to apply transverse toothings so that a cross-toothed pulley can be created.
- the round blank can have a thickness of 1.6 mm, it being possible to bring the contact surface 3 to a thickness of 3.2 mm by using the new method. It is known that a wall thickness increase of about 20 can be achieved even when boarding.
Description
Die Erfindung bezieht sich auf ein Verfahren gemäß dem Oberbegriff des Hauptanspruches.The invention relates to a method according to the preamble of the main claim.
Ein gattungsbildendes Verfahren ist beispielsweise in der US-PS 42 73 547 beschrieben. Bei diesem bekannten Verfahren zur Herstellung von Riemenscheiben oder Poly-V-Scheiben wird so vorgegangen, daß eine Metallronde in einem ersten Verfahrensschritt tiefgepreßt wird, so daß ein topfartiges Preßteil erzielt wird. Dieses in einem ersten Verfahrensschritt erzielte topfartige 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. Dieser erste Verfahrensschritt ist in den Fig. 1 und 2 der US-PS 42 73 547 dargestellt.A generic method is described for example in US Pat. No. 4,273,547. In this known process for the production of pulleys or poly-V pulleys, the procedure is such that a metal blank is deep-pressed in a first process step, so that a pot-like pressed part is obtained. This pot-like pressed part obtained in a first method step has in the area of the hub surface and in the area of the coaxial, i.e. the cylindrical surface extending substantially perpendicular to the hub surface has the same wall thickness. This first process step is shown in FIGS. 1 and 2 of US Pat. No. 4,273,547.
Anschließend ist es - was in der US-PS 42 73 547 nicht dargestellt ist - erforderlich, den Randbereich der gebildeten zylindrischen Fläche fein zu bearbeiten.Then it is - which is not shown in US-PS 42 73 547 - required to finely edit the edge region of the cylindrical surface formed.
Als nächster Verfahrensschritt schließt sich ein sogenanntes "Kollapsen" der zylindrischen Randfläche an, das in den Fig. 6a und 6b der US-PS 42 73 547 dargestellt ist. 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.The next process step is followed by a so-called "collapse" of the cylindrical edge surface, which is shown in FIGS. 6a and 6b of US Pat. No. 4,273,547. 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.
Der so gekollapste Randbereich wird dann über eine Zudrückrolle umgeformt und zusammengedrückt, wie dies in den Fig. 8b und 9 der US-PS 42 73 547 dargestellt ist.The edge region collapsed in this way is then deformed and compressed by means of a pressure roller, as is shown in FIGS. 8b and 9 of US Pat. No. 4,273,547.
Dieses bekannte Verfahren benötigt also im wesentlichen fünf aufeinanderfolgende, unbedingt erforderliche wesentliche Bearbeitungsschritte, wobei die für das "Kollapsen" aufzuwendenden Kräfte erheblich sind, so daß, um diese hohen Drücke aufzunehmen, große maschinelle Aufwendungen erforderlich sind.This known method therefore essentially requires five successive, absolutely essential, essential processing steps, the forces to be used for the "collapse" being considerable, so that large mechanical expenditure is required to absorb these high pressures.
Der Erfindung liegt die Aufgabe zugrunde, das gattungsbildende Verfahren so zu vereinfachen, daß trotz geringerem maschinellem Aufwand erreicht wird, daß die gebildete zylindrische Umfangsfläche, die auch als Auflagefläche bezeichnet wird, eine größere Wandstärke als die eigentliche Nabenfläche aufweist.The invention has for its object to simplify the generic method in such a way that, despite less mechanical effort, the cylindrical peripheral surface formed, which is also referred to as the contact surface, has a greater wall thickness than the actual hub surface.
Diese der Erfindung zugrundeliegende Aufgabe wird dadurch gelöst, daß die Metallronde in Abkehr von der bisherigen Arbeitsweise in einem ersten Verfahrensschritt bordiert wird und dann die Bordierung zur Bildung der Auflagefläche flachgedrückt wird. Durch diese Arbeitsweise wird das bisher im Stand der Technik erforderliche Bearbeiten des gebildeten Randes vermieden und anstelle der einen topfartigen Körper erzeugenden Tiefziehpresse wird eine einfache Bordierrolle eingesetzt.This object on which the invention is based is achieved in that the metal blank is flanged in a first process step in a departure from the previous method of operation and then the flanging is flattened to form the contact surface. This mode of operation eliminates the processing of the formed that was previously required in the prior art Edge avoided and instead of the deep-drawing press producing a pot-like body, a simple border roller is used.
Anstelle des "Kollapsens" im Stand der Technik wird nunmehr ein einfaches Zudrücken der Bordierung erforderlich und mit diesen drei einfachen Verfahrensschritten wird eine Riemenscheibe geschaffen, die der Anforderung entspricht, daß die eigentliche Nabenfläche dünner als die eigentliche Auflagefläche ausgebildet ist, wobei gleichzeitig die Durchführung dieses Verfahrens kostengünstig realisiert werden kann.Instead of "collapsing" in the prior art, a simple pressing of the border is now necessary and with these three simple method steps a pulley is created which meets the requirement that the actual hub surface is made thinner than the actual bearing surface, while simultaneously carrying out this Process can be realized inexpensively.
Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung erläutert. Die Zeichnung zeigt dabei in
- Fig. 1
- die in ein Futter eingespannte Ronde mit noch nicht tätiggewordener Bordierrolle, in
- Fig. 2
- die Bordierrolle einschließlich der erzielten Bordierung, in
- Fig. 3
- die erzielte Bordierung bei noch nicht tätiggewordener Zudrückrolle und in
- Fig. 4
- das erzielte Produkt, das als Endprodukt oder als Zwischenprodukt geeignet ist.
- Fig. 1
- the round blank clamped in a chuck with a yet not active border roll, in
- Fig. 2
- the boarding role including the boarding achieved, in
- Fig. 3
- the boarding achieved with the pinch roller not yet activated and in
- Fig. 4
- the product obtained, which is suitable as an end product or as an intermediate product.
In der Zeichnung ist eine Metallronde 1 gezeigt, die gemäß Fig. 1 zwischen zwei Futterbacken 4 und 5 eingespannt ist. Eine Bordierrolle 6, die bei ihrer Zuführung auf die Futterbacken 4 und 5, wie dies in Fig. 2 dargestellt ist, schafft eine Bordierung 2.In the drawing, a metal blank 1 is shown, which is clamped between two
In den Fig. 3 und 4 ist eine Zudrückrolle 7 gezeigt und bei Zuführen der Zudrückrolle 7 auf die Bordierung 2 wird das in Fig. 4 dargestellte Endprodukt erreicht, nämlich eine Auflagefläche 3, die eine größere Stärke als die Nabenfläche 8 der Metallronde 1 aufweist.3 and 4, a squeeze roller 7 is shown and when the squeeze roller 7 is fed onto the
In die so gebildete Auflagefläche können in Umfangsrichtung verlaufende Nuten eingearbeitet werden, so daß beispielsweise eine Poly-V-Scheibe gebildet wird oder es ist auch möglich, Querverzahnungen aufzubringen, so daß eine querverzahnte Riemenscheibe erstellt werden kann.Grooves running in the circumferential direction can be incorporated into the bearing surface thus formed, so that, for example, a poly-V pulley is formed or it is also possible to apply transverse toothings so that a cross-toothed pulley can be created.
Als Ausführungsbeispiel sei darauf hingewiesen, daß beispielsweise die Ronde eine Stärke von 1,6 mm aufweisen kann, wobei durch die Anwendung des neuen Verfahrens dann die Auflagefläche 3 auf eine Stärke von 3,2 mm gebracht werden kann. Hierbei ist es bekannt, daß bereits beim Bordieren eine Wandstärkenvergrößerung um etwa 20 erreichbar ist.As an exemplary embodiment, it should be pointed out that, for example, the round blank can have a thickness of 1.6 mm, it being possible to bring the
Claims (1)
- Method for manufacturing a pulley formed from a metal ronde (1) having a hub (8) and a coaxially extending cylindrical bearing surface (3), said bearing surface being essentially perpendicular to the hub portion and having a thickness greater than the thickness of the hub and may be provided with circumferentially extending grooves or with a transverse toothing,
characterized in
that said metal ronde (1) being pressed between wedge grips (4,5) is bordered in its peripheral portion by bordering roller means, i.e. said metal ronde is formed in a curved way essentially in the direction of the bearing surface to be formed and that then the so formed bordering (2) is pressed flat between the wedge grips (4,5) and press roller means (7) being adapted to the contour of said wedge grips for forming said thickened bearing surface (3).
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3818041 | 1988-05-27 | ||
DE3818041 | 1988-05-27 | ||
DE3819957A DE3819957C2 (en) | 1988-05-27 | 1988-06-11 | Process for manufacturing a pulley |
DE3819957 | 1988-06-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0343314A2 EP0343314A2 (en) | 1989-11-29 |
EP0343314A3 EP0343314A3 (en) | 1991-01-23 |
EP0343314B1 true EP0343314B1 (en) | 1993-03-17 |
Family
ID=25868515
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890100057 Expired - Lifetime EP0343314B1 (en) | 1988-05-27 | 1989-01-04 | Method of making a pulley |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0343314B1 (en) |
ES (1) | ES2038792T3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19524089C1 (en) * | 1995-07-01 | 1996-09-05 | Wf Maschinenbau Blechformtech | Method of mfg. gear part of thin metal disc |
DE10156086B4 (en) * | 2001-11-16 | 2006-09-14 | Winkelmann Powertrain Components Gmbh & Co. Kg | Method for producing a rotationally symmetrical component |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1242944B (en) * | 1990-12-12 | 1994-05-18 | Bompani Ivaldo Mta | DISC-SHAPED CUTTING TOOL |
US5152061A (en) * | 1992-02-19 | 1992-10-06 | Tesma International Inc. | Cold-forming of toothed wheels from sheet steel |
DE19620178C2 (en) * | 1996-05-20 | 1999-03-25 | Leifeld Gmbh & Co | Method of making a poly-V disc |
WO1998006521A1 (en) * | 1996-08-14 | 1998-02-19 | Wf-Maschinenbau Und Blechformtechnik Gmbh & Co. Kommanditgesellschaft | Process and device for manufacturing a gear part with outer teeth |
DE102010010269C5 (en) | 2010-03-05 | 2023-11-16 | Mercedes-Benz Group AG | Method for producing a stator support |
DE102012100985A1 (en) | 2012-02-07 | 2013-08-08 | WF Maschinenbau und Blechformtechnik GmbH & Co. KG | Method for manufacturing gear components, involves clamping metal blank with non-circular outer contour in tool and displacing in rotation around rotational axis, and transforming outer periphery of metal blank into axial area by rollers |
CN113770222B (en) * | 2021-09-25 | 2024-03-08 | 潍坊斐越工贸有限公司 | Forming method of hot spinning thrust wheel |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1943224A (en) * | 1932-07-18 | 1934-01-09 | Kelsey Hayes Wheel Corp | Method of forming brake drums |
US4273547A (en) * | 1975-11-04 | 1981-06-16 | Drive Manufacturing Inc. | Method of pulley manufacture and product |
US4631946A (en) * | 1984-03-02 | 1986-12-30 | Kabushiki Kaisha Kanemitsu | Method of manufacturing sheet metal made poly-V pulleys |
DE3445942A1 (en) * | 1984-12-17 | 1986-07-10 | KLIFA - Fahrzeugteile GmbH & Co, 6800 Mannheim | Method and apparatus for the production of a multi-groove driving pulley made of sheet metal |
DE3736096C1 (en) * | 1987-10-24 | 1988-09-15 | Wf Maschinenbau Blechformtech | Apparatus for the production of multi-groove V-belt pulleys |
-
1989
- 1989-01-04 ES ES89100057T patent/ES2038792T3/en not_active Expired - Lifetime
- 1989-01-04 EP EP19890100057 patent/EP0343314B1/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19524089C1 (en) * | 1995-07-01 | 1996-09-05 | Wf Maschinenbau Blechformtech | Method of mfg. gear part of thin metal disc |
DE10156086B4 (en) * | 2001-11-16 | 2006-09-14 | Winkelmann Powertrain Components Gmbh & Co. Kg | Method for producing a rotationally symmetrical component |
Also Published As
Publication number | Publication date |
---|---|
ES2038792T3 (en) | 1993-08-01 |
EP0343314A2 (en) | 1989-11-29 |
EP0343314A3 (en) | 1991-01-23 |
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