EP1362652B1 - Méthode et dispositif de fluotournage pour le formage d' un moyeu sans enlèvement de copeaux - Google Patents

Méthode et dispositif de fluotournage pour le formage d' un moyeu sans enlèvement de copeaux Download PDF

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Publication number
EP1362652B1
EP1362652B1 EP20020009798 EP02009798A EP1362652B1 EP 1362652 B1 EP1362652 B1 EP 1362652B1 EP 20020009798 EP20020009798 EP 20020009798 EP 02009798 A EP02009798 A EP 02009798A EP 1362652 B1 EP1362652 B1 EP 1362652B1
Authority
EP
European Patent Office
Prior art keywords
workpiece
roller
hub
acute
forming
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
Application number
EP20020009798
Other languages
German (de)
English (en)
Other versions
EP1362652A1 (fr
Inventor
Rudolf Jaschka Dipl.-Ing.
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.)
Leifeld Metal Spinning GmbH
Original Assignee
Leico GmbH and Co Werkzeugmaschinenbau
Leifeld Metal Spinning GmbH
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
Application filed by Leico GmbH and Co Werkzeugmaschinenbau, Leifeld Metal Spinning GmbH filed Critical Leico GmbH and Co Werkzeugmaschinenbau
Priority to EP20020009798 priority Critical patent/EP1362652B1/fr
Priority to DE50200600T priority patent/DE50200600D1/de
Publication of EP1362652A1 publication Critical patent/EP1362652A1/fr
Application granted granted Critical
Publication of EP1362652B1 publication Critical patent/EP1362652B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21H1/04—Making articles shaped as bodies of revolution discs; disc wheels with rim, e.g. railways wheels or pulleys
    • 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

Definitions

  • the invention relates on the one hand to a method for non-cutting Forming a hub on a workpiece in which a Roll with an acute-angled separating edge to one Rotation axis rotating workpiece and a material area is branched approximately V-shaped, this Subsequent material area by at least one post-forming roller is finally formed into the hub.
  • the invention relates on the other hand, a press-rolling machine for forming a hub with at least one roller with an acute-angled separating edge and with a chuck for picking up and holding of the workpiece, the chuck relative to the roll is driven to rotate.
  • a generic state of the art goes for example from DE 975 677, DE 196 03 773 A1 or DE 41 15 423 A1.
  • a Roll with an acute-angled separating edge which also as Split or cutting roller is called on a flat Ronde a material area branched in a V-shaped cross section or split off. Due to the acute-angled separating edge, which essentially leads to tensile forces in the material, the roller can penetrate the workpiece relatively easily, so that even small forming forces to deliver the Nip rolls are necessary. Due to the low forming forces the material structure of both the remaining radial workpiece area as well as the branched Workpiece area not too heavily loaded. In particular the risk of microstructure formation within the workpiece structure remains low.
  • a method and a press rolling machine for manufacturing Brake shoes are known from WO 01/66 278 A1.
  • a round blank is split on its outer circumference and curved on both sides folded.
  • the final shaping is carried out using post-forming rollers.
  • a process that is more gentle on the workpiece is from the Known from DE 198 49 981 A1 or DE 101 21 546 A1 which by means of a special forming roller a hub is formed without cutting.
  • the special forming roll includes a separating edge and an immediately adjacent one Compression area, the outer profile of which is the outer peripheral contour is adapted to the hub to be molded.
  • the invention has for its object to provide a method and a flow-forming machine, which is provided with a hub structure particularly friendly and economical conformable with high design freedom.
  • the method according to the invention is characterized in that that the postforming roller has an axial stop surface, through which an axial extension of the V-shaped branched material area is limited.
  • the process first becomes a material area by means of a roller with an acute-angled separating edge branched off, due to the acute-angled contour of Roll only low forming forces have to be applied. Due to the special contour of the roll, the forming forces introduced into the workpiece in a very targeted manner become. This protects the workpiece structure. The Risk of overstressing the structure and the The occurrence of structural cracks is significantly reduced.
  • there is also a high degree of design freedom and excellent material utilization take place because through the post-forming roller the V-shaped branched material area is limited in its axial extent. With the postforming roll is thus even a thickening of the branched Material area for forming the hub possible.
  • Another advantage of the invention is that the Roll with the acute-angled separating edge from a special high-strength tool steel or another particularly wear-resistant material can be manufactured. by virtue of the simple design can do this role despite the expensive and basically difficult to process material inexpensively are manufactured. Because the role on the actual Shape of the hub to be molded has no significant influence has the acute-angled roller for a variety of hub shapes can be used. A reworking of the Rolling, for example by grinding, is easily possible without that this affects the contour of the hub to be molded would be.
  • the postforming roller can because of the different stress be made from a simpler material. Consequently can be an inexpensive adjustment to the process changed hub shapes easily.
  • a foot radius on the hub can be chosen as desired become.
  • the axial stop surface of the postforming roller on a recess is formed, through which an outer contour and an axial length of the hub to be molded is specified.
  • the recess can be a convex or concave or have another profile, such as steps, grooves, etc. which is in a corresponding manner on the outer contour of the depicts the hub to be molded.
  • the delivery of the postforming roll only after Completion of the formation of the V-shaped branched area he follows.
  • the post-forming roller on the V-shaped branched material area is delivered even before the roller with the acute-angled separating edge its end position has reached.
  • delivery takes place the postforming roll for a certain period of time offset, so that by the re-forming the split off or Branch of the V-shaped material area is not hindered becomes.
  • Another advantageous embodiment of the method consists in that the hub between the re-forming roller and a tool mandrel is formed.
  • the outer contour of the tool mandrel can be cylindrical or with a convex or concave profile, for example with teeth or circumferential grooves be provided.
  • the workpiece can be attached to the chuck in any way held along its circumference or at the edge his. According to the invention, however, it is preferred that Workpiece is held in its central area.
  • the holding can be done by a so-called counter-holder, which centered in the workpiece and its outer area at the same time forms the tool mandrel.
  • the roller is usually on one essentially radially extending workpiece area delivered.
  • a hub is characterized in that a radial outer workpiece area axially into a recess of a Spinning chuck is pressed so that a radially inner The workpiece area protrudes axially by a defined amount, that on the protruding inner workpiece area a role is delivered, through which a wall thickness of the inner workpiece area is reduced, and that workpiece material is formed into the hub.
  • This method according to the invention can then be used come when not molding the whole of a hub Material of a sheet metal blank or a radial workpiece area is required for material acceptance.
  • This method can be used in particular with a roll with an acute-angled separating edge and the subsequent delivery of a postforming roll in accordance with the previously described Procedures are used.
  • the radial inner, protruding workpiece area can also be used another known forming roll for non-cutting shaping a hub can be reduced in its workpiece thickness.
  • any holder of the Workpiece on the chuck any holder of the Workpiece on the chuck.
  • a preferred one Possibility is that the Pressing the outer workpiece area expands it radially and against an annular shoulder on the spinning chuck shaped and clamped. The workpiece would, so to speak non-positively and / or positively pressed into a ring shape will be, after the completion of the processing Workpiece ejected by an ejector on the chuck becomes.
  • the invention is characterized in that in addition a post-forming roll is provided with an axial stop surface and that the postforming roll is spatially and temporally offset from the roll is adjustable with the acute-angled separating edge.
  • a circular-shaped workpiece 1 is on one
  • the chuck 15 is arranged with a support surface and by means of a tool mandrel 16, which also serves as a counter-holder serves axially clamped.
  • a tool mandrel 16 which also serves as a counter-holder serves axially clamped.
  • Roll 10 To the free edge of the a workpiece 1 rotating about an axis of rotation 14 Roll 10 with an acute-angled separating edge 12 radially delivered at an acute angle of attack.
  • a material area 3 split off in cross section approximately V-shaped becomes.
  • this splitting with the roll 10 remains the workpiece structure in the branched material area 3 and especially in the reduced radial wall area 4 largely unchanged.
  • the axial stop surface 22 limits the axial extension of the V-shaped branch Material area 3.
  • FIG. 2 The delivery of the roll 10 at different times and locations the post-forming roller 20 on the workpiece 1 is shown in FIG. 2 shown schematically.
  • the roll 10 and the postforming roll 20 are mounted on a single press rolling machine, whereby whose feed axes are offset by 120 ° around the axis of rotation are arranged.
  • This can be a calibration process or a special foot radius at the transition of the hub 5 to the radially extending area of workpiece 1.
  • FIGS. 3a to 3c A method alternative is shown in FIGS. 3a to 3c, in contrast to the method according to FIG. 1 the roller 10 with the acute-angled separating edge 12 is not only radially, but also axially at the workpiece 1 is delivered. In this way, the remaining radial workpiece area 4, which is oriented toward the axis of rotation 14 tapered wall thickness set.
  • Such a wall thickness curve can be used for gear parts with a desired special flexibility may be advantageous.
  • FIGS. 4a to 4c The further process variant according to FIGS. 4a to 4c is also based on the previously described embodiments, in contrast to the embodiment of 1 shows the roller 10 with the acute-angled separating edge 12 not at the edge, but in a middle area of the circular workpiece 1 according to FIG. 4a.
  • the roll 10 is first corresponding in the cutting direction the acute-angled separating edge retracted into the workpiece 1, in order to impair the structure of the workpiece To avoid workpiece 1 as far as possible.
  • the direction of displacement runs vertically to the axis of rotation 11 of the roller 10 and is shown schematically by an arrow in FIG. 4b.
  • the further delivery of the roll 10 takes place as in the Embodiment of Fig. 1 in the radial direction, wherein subsequently the postforming roll in the manner already described 20 for final shaping of the hub 5 is delivered.
  • the postforming roller can 20 of the thinned, radial workpiece area 4 be slightly spaced axially.
  • the foot radius at the transition between the hub 5 and the radial workpiece area 4 can by the roller 10 or a separate shaping roller respectively.
  • the forming forces can largely evenly on the branching off of the material area 3 through the roller 10 with the acute-angled separating edge 12 and on one or more post-forming rollers 20 for Forming and final shaping of the hub area 5 from the V-shaped branch Material area 3 can be distributed. It can therefore worked with lower overall maximum forming forces be what is gentle on both the workpiece and is the pressure rolling machine. The wear and the maintenance effort and the energy required to deliver the rolls are reduced. Because of the lower overall load of tools there is also the possibility of To increase the forming speed and thus the production time to shorten each workpiece.
  • FIGS. 5a to 5e Another aspect of the invention is in FIGS. 5a to 5e shown.
  • a disc-shaped workpiece 1 is on a Pressure chuck 15 clamped by means of a tool mandrel 16, which at the same time acts as a counterhold to the center axially pressing the workpiece 1 against the chuck 15 serves.
  • a pressure roller which is the postforming roller 20 in the present case outer workpiece area 6 in an annular recess 18 pressed in pressure chuck 15, as shown in Fig. 5b. It arises such a set back radially outer workpiece area 6 and an inner projecting workpiece area 7.
  • this method a workpiece 1 with a hub 5 and an outer Workpiece area 6 created with a wall thickening, wherein however, the machined face is flat.

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

Claims (11)

  1. Procédé de formage sans enlèvement de copeau d'un moyeu (5) sur une pièce (1), dans lequel un rouleau (10) avec un bord tranchant (12) à angle aigu est approché de la pièce (1) tournant autour d'un axe de rotation (14) et une zone de matière (3) est fendue approximativement en forme de V, cette zone de matière (3) étant ensuite transformée en moyeu final (5) par au moins un rouleau de post-formage (20), caractérisé en ce que le rouleau de post-formage (20) présente une surface de butée axiale (22) avec laquelle une extension axiale de la zone de matière (3) fendue en V est limitée.
  2. Procédé selon la revendication 1, caractérisé en ce que la surface de butée axiale (22) du rouleau de post-formage (20) est réalisée sur un évidement (24) par lequel un contour extérieur et une longueur axiale du moyeu (5) à former sont imposés.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le rouleau (10) avec le bord tranchant (12) à angle aigu est approché de la pièce (1) d'une position de départ jusqu'à une position finale, dans laquelle le moyeu (5) forme saillie axiale sur la pièce (1).
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le rouleau de post-formage (20) est approché au niveau de la zone de matière (3) fendue en V avant que le rouleau (10) à bord tranchant (12) à angle aigu ait atteint sa position finale.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le moyeu (5) est formé entre le rouleau de post-formage (20) et un tourillon central porte-outil (16).
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la pièce (1) est tenue dans sa partie centrale.
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le rouleau (10) à bord tranchant (12) à angle aigu est approché radialement et axialement de manière simultanée.
  8. Procédé de formage sans enlèvement de copeau d'un moyeu selon l'une quelconque des revendications 1 à 7, caractérisé
        en ce qu 'une zone (6) de pièce radialement extérieure est repoussée axialement dans un renfoncement (18) d'un mandrin (15) de fluotournage, de telle sorte qu'une zone (7) de pièce radialement intérieure forme saillie axialement d'une distance définie,
        en ce qu 'on approche contre la zone intérieure (7) de pièce en saillie un rouleau (10) avec lequel une épaisseur de paroi de la zone intérieure (7) de pièce est réduite, et
       en ce que la matière de la pièce ainsi dégagée est transformée en moyeu (5).
  9. Procédé selon la revendication 8, caractérisé en ce que la zone intérieure (7) de pièce saillante a une épaisseur de paroi réduite de la valeur dont celle-ci forme saillie axialement par rapport à la zone extérieure (6) de pièce repoussée.
  10. Procédé selon la revendication 8 ou 9, caractérisé en ce que, lors du repoussage de la zone extérieure (6) de pièce, celle-ci est élargie radialement et formée contre un épaulement annulaire du mandrin (15) de fluotournage, en étant serrée.
  11. Machine de fluotournage pour former un moyeu selon un procédé selon l'une quelconque des revendications 1 à 10, avec au moins un rouleau (10) à bord tranchant (12) à angle aigu pour fendre une zone de matière (3) en forme de V et avec un mandrin (15) de fluotournage pour recevoir et tenir la pièce (1), le mandrin (15) de fluotournage pouvant être entraíné en rotation par rapport au rouleau (10),
       caractérisé en ce qu'en plus, un rouleau de post-formage (20) est muni d'une surface de butée axiale (22) et
       en ce que, pour limiter une extension axiale de la zone de matière (3) en forme de V, le rouleau de post-formage (20) peut être approché pendant le fendage d'une façon décalée dans l'espace et le temps par rapport au rouleau (10) à bord tranchant (12) à angle aigu.
EP20020009798 2002-04-30 2002-04-30 Méthode et dispositif de fluotournage pour le formage d' un moyeu sans enlèvement de copeaux Expired - Lifetime EP1362652B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20020009798 EP1362652B1 (fr) 2002-04-30 2002-04-30 Méthode et dispositif de fluotournage pour le formage d' un moyeu sans enlèvement de copeaux
DE50200600T DE50200600D1 (de) 2002-04-30 2002-04-30 Verfahren und Drückwalzmaschine zum spanlosen Anformen einer Nabe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20020009798 EP1362652B1 (fr) 2002-04-30 2002-04-30 Méthode et dispositif de fluotournage pour le formage d' un moyeu sans enlèvement de copeaux

Publications (2)

Publication Number Publication Date
EP1362652A1 EP1362652A1 (fr) 2003-11-19
EP1362652B1 true EP1362652B1 (fr) 2004-07-07

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EP20020009798 Expired - Lifetime EP1362652B1 (fr) 2002-04-30 2002-04-30 Méthode et dispositif de fluotournage pour le formage d' un moyeu sans enlèvement de copeaux

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EP (1) EP1362652B1 (fr)
DE (1) DE50200600D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016214303A1 (de) * 2016-08-03 2018-02-08 Schaeffler Technologies AG & Co. KG Verfahren zur Herstellung einer Anpressplatteneinheit, Anpressplatteneinheit und Reibungskupplung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19603773A1 (de) * 1996-02-02 1996-08-08 Leifeld Gmbh & Co Verfahren zum Herstellen rotationssymmetrischer Körper mit Nabe
JP3192979B2 (ja) * 1996-05-17 2001-07-30 小島プレス工業株式会社 基部外面上に円筒部が一体形成されてなる金属成形品の成形装置並びにかかる金属成形品の成形方法
JP3408151B2 (ja) * 1997-10-08 2003-05-19 小島プレス工業株式会社 円筒部が同心的に一体形成されてなる金属製品の成形装置並びにかかる金属製品の成形方法
DE19849981C5 (de) * 1998-10-29 2006-04-20 Leifeld Metal Spinning Gmbh Verfahren zum Formen eines scheibenförmigen Teiles mit Nabe und Drückrolle für das Verfahren
WO2001066278A1 (fr) * 2000-03-10 2001-09-13 Kanemitsu Corporation Procede de refendage, dispositif de refendage et procede de fabrication d'un patin de frein en tole par refendage
DE10121546B4 (de) * 2001-05-03 2006-05-24 Leifeld Metal Spinning Gmbh Verfahren und Drückrolle zum Anformen einer Nabe

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EP1362652A1 (fr) 2003-11-19
DE50200600D1 (de) 2004-08-12

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