EP1909985B1 - Method of forming a circular sheet-metal blank - Google Patents

Method of forming a circular sheet-metal blank Download PDF

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Publication number
EP1909985B1
EP1909985B1 EP06762175.5A EP06762175A EP1909985B1 EP 1909985 B1 EP1909985 B1 EP 1909985B1 EP 06762175 A EP06762175 A EP 06762175A EP 1909985 B1 EP1909985 B1 EP 1909985B1
Authority
EP
European Patent Office
Prior art keywords
diameter
metal blank
blank
sheet
starting
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.)
Revoked
Application number
EP06762175.5A
Other languages
German (de)
French (fr)
Other versions
EP1909985A1 (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
Original Assignee
WF Maschinenbau und Blechformtecknik GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37192363&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1909985(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by WF Maschinenbau und Blechformtecknik GmbH and Co KG filed Critical WF Maschinenbau und Blechformtecknik GmbH and Co KG
Priority to PL06762175T priority Critical patent/PL1909985T3/en
Publication of EP1909985A1 publication Critical patent/EP1909985A1/en
Application granted granted Critical
Publication of EP1909985B1 publication Critical patent/EP1909985B1/en
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/02—Making articles shaped as bodies of revolution discs; disc wheels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49481—Wheel making

Definitions

  • the invention relates to a method for forming a sheet metal blank with a central hole, which rests on a plane tool rotating about an axis and has a thickness al and a diameter d1, which is smaller than the diameter of the tool.
  • one or more spinning roller (s) preferably first immersed axially in the material of the sheet metal blank and then moved radially outward (this is to be understood that the way pressure roller at least one component of movement in the radial direction), whereby the surface of the circular sheet metal plate radially is enlarged in all directions.
  • Such a method is from the DE 1 016 038 C1 known.
  • the invention has the object to go new ways in the transformation of sheet metal blanks by means of spinning rollers.
  • the diameter is increased by more than 10%, in particular more than 20%.
  • the term of the sheet metal blank is not too narrow in view of the part produced by the forming. It is on the one hand possible to produce a flat sheet metal blank.
  • the sheet metal blank can be further processed into a gear part.
  • the method can be used in a wide variety of fields.
  • a preferred application is to enlarge "small" circular blanks as e.g. in Radschüsselherzan for trucks almost as a waste incurred, which would otherwise be scrapped.
  • the invention makes use for a different purpose, e.g. for the production of wheeled dishes for smaller commercial vehicles still possible. The resulting cost advantage can not be underestimated.
  • Fig. 1 shows a sheet metal blank 1, preferably with a central hole 2, in Fig. 2 on a rotatable about an axis 3 tool 4 (on a spindle not shown here a spinning machine) rests and has a thickness a1 and a diameter d1.
  • the sheet metal blank 1 is preferably held on the central hole 2.
  • the axial length of the pin 5 may be smaller, equal to or greater than the thickness d1 of the circular sheet metal d1.
  • the sheet metal blank 1 is preferably made of a cast iron or other formable by pressing other metal.
  • the tool 4 extends radially in all directions beyond the outer circumference of the sheet metal blank 1 with a preferably circular shape. It preferably has a flat surface.
  • one or more freely rotatable spinning rollers 7 are arranged, which are deliverable at least axially in the direction x of the workpiece and radially in direction r in superimposed movements.
  • the spinning roller 7 is delivered axially in the direction x at a distance from the outer circumference, close to the centric hole or even at the edge of the centric hole, immersed in the workpiece. Then or while it is radially moved in the direction r outward so that it presses material of the sheet metal blank 1 in front of it radially outward.
  • the surface of the blank 1 is radially enlarged in all directions, and surprisingly without cracking in the outer peripheral region.
  • this process is repeated several times.
  • a freely rotatable hold-down roller 8 in the outer peripheral region prevents the blank material from bulging out of the plane of the sheet metal blank 1.

Landscapes

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

Description

Die Erfindung betrifft ein Verfahren zum Umformen einer Blechronde mit einem zentrischen Loch, die auf einem um eine Achse rotierenden ebenen Werkzeug aufliegt und eine Dicke al sowie einen Durchmesser d1 aufweist, der kleiner als der Durchmesser des Werkzeugs ist. Dabei werden eine oder mehrere Drückrolle(n) vorzugsweise zunächst axial in das Material der Blechronde eingetaucht und dann radial nach außen bewegt (dies ist so zu verstehen, dass der Weg Drückrolle zumindest eine Bewegungskomponente in radialer Richtung enthält), wodurch die Fläche der Blechronde radial in allen Richtungen vergrößert wird. Ein solches Verfahren ist aus der DE 1 016 038 C1 bekannt.The invention relates to a method for forming a sheet metal blank with a central hole, which rests on a plane tool rotating about an axis and has a thickness al and a diameter d1, which is smaller than the diameter of the tool. In this case, one or more spinning roller (s) preferably first immersed axially in the material of the sheet metal blank and then moved radially outward (this is to be understood that the way pressure roller at least one component of movement in the radial direction), whereby the surface of the circular sheet metal plate radially is enlarged in all directions. Such a method is from the DE 1 016 038 C1 known.

Die Erfindung hat die Aufgabe, neue Wege bei der Umformung von Blechronden mittels Drückrollen zu gehen.The invention has the object to go new ways in the transformation of sheet metal blanks by means of spinning rollers.

Die Erfindung löst diese Aufgabe durch den Gegenstand des Anspruchs 1.The invention solves this problem by the subject matter of claim 1.

Es wird aus der Blechronde mit dem Ausgangsdurchmesser d1 und der Dicke a1 ein rotationssymmetrisches Teil, nämlich eine weitere Blechronde mit einem größeren Durchmesser d2 und bis zum Außendurchmesser verringerten Dicke a2 hergestellt.It is from the sheet metal blank with the initial diameter d1 and the thickness a1 a rotationally symmetric part, namely a further sheet metal blank with a larger diameter d2 and to the outer diameter reduced thickness a2 produced.

Vorteilhafte Ausgestaltungen sind den Unteransprüchen zu entnehmen.Advantageous embodiments can be found in the dependent claims.

Es wird der Durchmesser um mehr als 10% insbesondere mehr als 20% vergrößert.The diameter is increased by more than 10%, in particular more than 20%.

Der Begriff der Blechronde ist in Hinsicht auf das durch das Umformen hergestellte Teil nicht zu eng zu sehen. Es ist einerseits möglich, eine ebene Blechronde herzustellen. Zudem kann die Blechronde zu einem Getriebeteil weiterverarbeitet werden.The term of the sheet metal blank is not too narrow in view of the part produced by the forming. It is on the one hand possible to produce a flat sheet metal blank. In addition, the sheet metal blank can be further processed into a gear part.

Das Verfahren kann in verschiedensten Bereichen eingesetzt werden. Eine bevorzugte Anwendung ist das Vergrößern "kleiner" Blechronden, wie sie z.B. bei der Radschüsselherstellung für LKW quasi als Verschnitt anfallen, der ansonsten verschrottet werden müsste. Mit der Erfindung ist dagegen eine Nutzung für einen anderen Zweck, z.B. zur Herstellung von Radschüsseln für kleinere Nutzfahrzeuge noch möglich. Der hierdurch erreichbare Kostenvorteil ist nicht zu unterschätzen.The method can be used in a wide variety of fields. A preferred application is to enlarge "small" circular blanks as e.g. in Radschüsselherstellung for trucks almost as a waste incurred, which would otherwise be scrapped. By contrast, the invention makes use for a different purpose, e.g. for the production of wheeled dishes for smaller commercial vehicles still possible. The resulting cost advantage can not be underestimated.

Mögliche Anwendungen ergeben sich auch im Bereich der Starterkränze. Bei all diesen Teilen ergeben sich durch die Erfindung neue Lösungsansätze, die z.B. den Materialabfall und damit die Herstellkosten erheblich senken.Possible applications also arise in the area of starter rings. In all these parts, the invention provides novel solutions, e.g. significantly reduce material waste and thus manufacturing costs.

Zwar ist es bekannt, dass sich eine Ronde beim Eintauchen einer Drückrolle etwas aufweitet, so beim Anformen einer Nabe. Das Aufweiten ist aber nur ein Nebeneffekt, der an einem Wiederlagerfutter zum Einspannen der Ronde führt. Zudem wird die Ronde nicht radial nach außen sondern radial nach innen bewegt, so dass kein gezieltes Aufweiten, insbesondere nicht um mehr als die den Unteransprüchen genannten Prozentangaben erfolgt.Although it is known that a Ronde dilates something when immersing a spinning roller, so when molding a hub. However, the expansion is only a side effect, which leads to a repository for clamping the Ronde. In addition, the blank is not moved radially outward but radially inward, so that no targeted expansion, in particular not more than the subclaims mentioned percentages.

Nachfolgend wird die Erfindung unter Bezug auf die Zeichnung anhand eines Ausführungsbeispiels näher beschrieben. Es zeigt:

  • Fig. 1 eine Metallronde als Ausgangswerkstück; und
  • Fig. 2 die Metallronde aus Fig. 1 in gestrichelter Darstellung auf einem Werkzeug und mit durchgezogenen Linien nach der Umformung.
The invention will be described in more detail with reference to the drawing with reference to an embodiment. It shows:
  • Fig. 1 a metal blank as a starting workpiece; and
  • Fig. 2 the metal blank out Fig. 1 in dashed lines on a tool and with solid lines after forming.

Fig. 1 zeigt eine Blechronde 1, vorzugsweise mit einem zentrischen Loch 2, die in Fig. 2 auf einem um eine Achse 3 drehbaren Werkzeug 4 (auf einer hier nicht dargestellten Spindel einer Drückmaschine) aufliegt und eine Dicke a1 sowie einen Durchmesser d1 aufweist. Fig. 1 shows a sheet metal blank 1, preferably with a central hole 2, in Fig. 2 on a rotatable about an axis 3 tool 4 (on a spindle not shown here a spinning machine) rests and has a thickness a1 and a diameter d1.

Die Blechronde 1 ist vorzugsweise am zentrischen Loch 2 gehalten. Hierzu greift in das zentrische Loch zumindest ein Stift 5 ggf. auch spannend ein, an den sich auf der vom Werkzeug abgewandten Seite der Blechronde eine Gegenhaltereinrichtung 6 anschließen kann, der einen größeren Durchmesser aufweist als das zentrische Loch. Die axiale Länge des Stiftes 5 kann kleiner, genauso groß oder größer sein als die Dicke d1 der Blechronde d1. Die Blechronde 1 besteht vorzugsweise aus einem Eisenguss oder einem durch Drücken umformbaren sonstigen Metall.The sheet metal blank 1 is preferably held on the central hole 2. For this purpose, at least one pin 5, if necessary also exciting, engages into the centric hole, to which a counter-holding device 6 can connect, which has a larger diameter than the central hole, on the side of the sheet metal blank facing away from the tool. The axial length of the pin 5 may be smaller, equal to or greater than the thickness d1 of the circular sheet metal d1. The sheet metal blank 1 is preferably made of a cast iron or other formable by pressing other metal.

Das Werkzeug 4 erstreckt sich radial in allen Richtungen über den Außenumfang der Blechronde 1 mit vorzugsweise kreisrunder Form hinaus. Es hat vorzugsweise eine ebene Oberfläche.The tool 4 extends radially in all directions beyond the outer circumference of the sheet metal blank 1 with a preferably circular shape. It preferably has a flat surface.

Oberhalb der Blechronde 1 sind eine oder mehrere frei drehbare Drückrollen 7 angeordnet, die zumindest axial in Richtung x des Werkstückes und radial in Richtung r auch in überlagerten Bewegungen zustellbar sind.Above the sheet metal blank 1, one or more freely rotatable spinning rollers 7 are arranged, which are deliverable at least axially in the direction x of the workpiece and radially in direction r in superimposed movements.

Sobald das Werkzeug 4 mit der Blechronde 1 eine vorgegebene Drehgeschwindigkeit erreicht hat, wird die Drückrolle 7 mit einem Abstand zum Außenumfang, nahe zum zentrischen Loch oder sogar am Rand des zentrischen Loches axial in Richtung x zugestellt, wobei sie in das Werkstück eingetaucht. Sodann oder dabei wird sie radial in Richtung r nach außen bewegt, so dass sie Material der Blechronde 1 vor sich her radial nach außen drückt. Derart wird die Fläche der Ronde 1 radial in allen Richtungen vergrößert, und zwar überraschenderweise ohne Rissbildung im Außenumfangsbereich.As soon as the tool 4 with the sheet metal blank 1 has reached a predetermined rotational speed, the spinning roller 7 is delivered axially in the direction x at a distance from the outer circumference, close to the centric hole or even at the edge of the centric hole, immersed in the workpiece. Then or while it is radially moved in the direction r outward so that it presses material of the sheet metal blank 1 in front of it radially outward. Thus, the surface of the blank 1 is radially enlarged in all directions, and surprisingly without cracking in the outer peripheral region.

Vorzugsweise wird dieser Vorgang mehrfach wiederholt.Preferably, this process is repeated several times.

Eine frei drehbare Niederhalterolle 8 im Außenumfangsbereich verhindert, dass sich das Rondenmaterial aus der Ebene der Blechronde 1 vorwölbt.A freely rotatable hold-down roller 8 in the outer peripheral region prevents the blank material from bulging out of the plane of the sheet metal blank 1.

Bezugszeichenreference numeral

Blechrondesheet metal blank
11
Lochhole
22
Achseaxis
33
WerkzeugTool
44
Stiftpen
55
Gegenhalterbackstop
66
Drückrollenspinning rollers
77
NiederhalterolleDown roller
88th
Dickethickness
a1, a2a1, a2
Durchmesserdiameter
d1, d2d1, d2

Claims (6)

  1. Method for forming a sheet-metal blank (1) which rests on a flat die (4), which rotates about an axis (3), and has a thickness a1 and a diameter d1 which is smaller than the diameter of the die (4), at least one pressure roller (7) being dipped axially into the material of the sheet-metal blank (1) and being moved radially to the outside, with the result that the surface area of the sheet-metal blank (1) is enlarged radially in all directions, with the result that a rotationally symmetrical part, namely a further sheet-metal blank having a greater diameter d2 and a thickness d2 which is reduced as far as the outer circumference, being formed from the sheet-metal blank (1) having the starting diameter d1 and the thickness a1, characterized in that, in order to produce the further sheet-metal blank having a greater diameter, the pressure roller (7) is dipped into the sheet-metal blank having a smaller diameter near to a central hole (2) which receives a pin (5) for holding it such that it cannot rotate, or at the edge of the said central hole (2), and is moved radially to the outside with the formation of the reduced thickness a2, the diameter d2 being greater by more than 10% than the starting diameter d1, migration of the blank material in the axial direction being prevented by means of one or more freely rotatable hold-down rollers (8).
  2. Method according to Claim 1, characterized in that the feeding of the at least one pressure roller (7) radially from the inside to the outside is repeated multiple times.
  3. Method according to one of the preceding claims, characterized in that metal blanks having a greater diameter than the starting blank are produced by way of the method.
  4. Method according to one of the preceding claims, characterized in that cut parts or blanks for rim production are processed by way of the method.
  5. Method according to one of the preceding claims, characterized in that transmission parts having a greater diameter than the starting blank are produced by way of the method.
  6. Method according to one of the preceding claims, characterized in that starter crown gears having a greater diameter than the starting blank are produced by way of the method.
EP06762175.5A 2005-07-25 2006-06-24 Method of forming a circular sheet-metal blank Revoked EP1909985B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06762175T PL1909985T3 (en) 2005-07-25 2006-06-24 Method of forming a circular sheet-metal blank

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005035229 2005-07-25
DE102005035519A DE102005035519A1 (en) 2005-07-25 2005-07-26 Method for forming a sheet metal blank
PCT/EP2006/006105 WO2007012367A1 (en) 2005-07-25 2006-06-24 Method of forming a circular sheet-metal blank

Publications (2)

Publication Number Publication Date
EP1909985A1 EP1909985A1 (en) 2008-04-16
EP1909985B1 true EP1909985B1 (en) 2014-04-30

Family

ID=37192363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06762175.5A Revoked EP1909985B1 (en) 2005-07-25 2006-06-24 Method of forming a circular sheet-metal blank

Country Status (9)

Country Link
US (1) US20090211323A1 (en)
EP (1) EP1909985B1 (en)
JP (1) JP2009502508A (en)
KR (1) KR20080026192A (en)
CA (1) CA2614931A1 (en)
DE (1) DE102005035519A1 (en)
ES (1) ES2484800T3 (en)
PL (1) PL1909985T3 (en)
WO (1) WO2007012367A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1026796C2 (en) * 2004-08-06 2006-02-07 Fontijne Grotnes B V Method and device for manufacturing a rim ring by means of cold deformation.
CN101966555A (en) * 2009-07-28 2011-02-09 上海兴浦旋压车轮有限公司 Wheel rolling and molding method
CN104759851A (en) * 2015-04-07 2015-07-08 常州龙之合飞轮总成系统有限公司 Novel formation process of flywheel of engine
CN114042844A (en) * 2021-11-09 2022-02-15 常州和仕达机械装备制造有限公司 Horizontal rolling forming device for special-shaped ring piece
CN114042843A (en) * 2021-11-09 2022-02-15 常州和仕达机械装备制造有限公司 Horizontal rolling process and forming device for special-shaped ring piece

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD236824A1 (en) * 1985-04-30 1986-06-18 Karl Marx Stadt Haushaltgeraet METAL PRESSURE PROCESS FOR THE PRODUCTION OF PUNCHING CUPS
DD283088A5 (en) * 1989-05-16 1990-10-03 Karl Marx Stadt Haushaltgeraet METHOD FOR PRODUCING ROUND-KNIFE CUTTING
DE10033239A1 (en) * 2000-07-10 2002-01-24 Wf Maschinenbau Blechformtech Method to manufacture adjusting disc for infinitely variable change speed gear with conical part formed by forging or turning of round metal blank

Family Cites Families (4)

* Cited by examiner, † Cited by third party
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
DE10108498C1 (en) * 2001-02-22 2002-08-22 Wf Maschinenbau Blechformtech Device for the non-cutting production of a shaped body having a concentric hub
DE10160038C1 (en) * 2001-12-06 2003-03-13 Winkelmann & Pannhoff Gmbh & C Rotary-symmetrical component manufacturing process, for making gears, involves reducing thickness of disk-shaped hub region, displacing material to increase external diameter
EP1697066B1 (en) * 2003-11-17 2008-01-02 Wf-Maschinenbau Und Blechformtechnik Gmbh & Co. Kg Method for the production of a flange on a circular sheet metal blank

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD236824A1 (en) * 1985-04-30 1986-06-18 Karl Marx Stadt Haushaltgeraet METAL PRESSURE PROCESS FOR THE PRODUCTION OF PUNCHING CUPS
DD283088A5 (en) * 1989-05-16 1990-10-03 Karl Marx Stadt Haushaltgeraet METHOD FOR PRODUCING ROUND-KNIFE CUTTING
DE10033239A1 (en) * 2000-07-10 2002-01-24 Wf Maschinenbau Blechformtech Method to manufacture adjusting disc for infinitely variable change speed gear with conical part formed by forging or turning of round metal blank

Also Published As

Publication number Publication date
JP2009502508A (en) 2009-01-29
WO2007012367A1 (en) 2007-02-01
KR20080026192A (en) 2008-03-24
EP1909985A1 (en) 2008-04-16
ES2484800T3 (en) 2014-08-12
US20090211323A1 (en) 2009-08-27
DE102005035519A1 (en) 2007-02-01
CA2614931A1 (en) 2007-02-01
PL1909985T3 (en) 2014-12-31

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