EP1382404B1 - Méthode, rouleau et machine de fluotournage pour le formage d' un moyeu cylindrique sans enlèvement de copeaux - Google Patents

Méthode, rouleau et machine de fluotournage pour le formage d' un moyeu cylindrique sans enlèvement de copeaux Download PDF

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Publication number
EP1382404B1
EP1382404B1 EP20020013831 EP02013831A EP1382404B1 EP 1382404 B1 EP1382404 B1 EP 1382404B1 EP 20020013831 EP20020013831 EP 20020013831 EP 02013831 A EP02013831 A EP 02013831A EP 1382404 B1 EP1382404 B1 EP 1382404B1
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EP
European Patent Office
Prior art keywords
roller
hub
split
splitting
forming
Prior art date
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Expired - Lifetime
Application number
EP20020013831
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German (de)
English (en)
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EP1382404A1 (fr
Inventor
Rudolf Dipl.-Ing. Jaschka
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
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Leifeld Metal Spinning GmbH
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Application filed by Leifeld Metal Spinning GmbH filed Critical Leifeld Metal Spinning GmbH
Priority to DE50212149T priority Critical patent/DE50212149D1/de
Priority to EP20020013831 priority patent/EP1382404B1/fr
Publication of EP1382404A1 publication Critical patent/EP1382404A1/fr
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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
    • 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

Definitions

  • the invention relates to a method for the non-cutting molding of a cylindrical hub on a workpiece according to the preamble of claim 1.
  • a split roller with an acute-angled Trennsuit delivered to the rotating about a rotation axis workpiece and a material region is split off, wherein from the split-material region by at least one Nachformrolle the cylindrical hub is finally formed.
  • the invention further relates to a roller for carrying out this method and to a flow-forming machine having at least one clearance roller with an acute-angled separating edge and with a spinning chuck for receiving and holding the workpiece, wherein the spinning chuck is rotatably drivable relative to the clearance roller.
  • JP-A-09122816 A generic prior art is known from JP-A-09122816 known.
  • a gap roller with an acute-angled edge is delivered to a ronde-shaped workpiece, which runs off in an arc.
  • a split-off region is directed into a recess on a spinning chuck.
  • the recess on the spinning chuck has an axial stop surface for limiting the hub region.
  • a forming roll is known in which a workpiece area is axially removed from a sheet metal blank and formed directly into a scar.
  • the Forming roller has a shoulder corresponding to the length of the hub to be formed.
  • a method for producing a brake shoe is from the WO-A-01/66278 out.
  • a sheet metal blank is first split in its outer area in two halves, which are folded to form a cylinder jacket to both sides. From this, a drum-shaped outer wall area is created.
  • a workpiece sparing method is from the DE 198 49 981 A1 known, in which by means of a special forming roll a hub is formed without cutting.
  • the special forming roller comprises an approximately rectangular separating edge and an upwardly adjoining compression region, the outer profile of which is adapted to the outer peripheral contour of the hub to be formed.
  • the invention has for its object to provide a method, a role and a flow-forming machine, with which a hub is particularly ge sympaschafonend and economically formable.
  • the split-off material region is provided with a defined curve shape before the final shaping. It is provided according to the inventive method of the split material area with a special, tailored to the desired hub shape contour. It has been found that when forming a V-shaped split material region into a cylindrical hub, a different material texture is formed across the axial length of the molded hub. This is because the material at the free end of the hub is deformed and stressed more than in the transition region of the hub to the workpiece body. In addition, the material is more likely to flow in the direction of the free end of the hub during final molding, so that a uniform wall thickness of the hub can be set only with a relatively large calibration effort.
  • the material area before the final molding in a desired manner with respect to its outer contour and / or its wall thickness can a hub without extensive calibration with a high degree of uniformity in terms of wall thickness and material structure are made.
  • a cylindrical hub is to be understood as an axially projecting hub, which may also have teeth, grooves, steps, etc. on its outer or inner contour. These can be formed without cutting simultaneously with the final shaping. The process can be carried out as cold or hot forming.
  • a particularly efficient method implementation according to the invention is that the material region is already provided with the curve form during the splitting-off process by the splitting roller.
  • a split roller is used with a corresponding outer contour for producing the curve shape.
  • an intermediate form roller is delivered, through which the split material region is provided with the curve shape.
  • the intermediate shaping roll converts the material region split off approximately in the form of a V into the desired manner, so that in the subsequent final forming step the hub can be formed with the desired geometry and material properties.
  • curve shape in the sense of the invention basically means any contour shape deviating from a straight outer contour line.
  • a radially outwardly convex, convex contour is provided as a curve shape.
  • This may be a circular arc or hump-shaped steps or heels, which may optionally be associated with a thickening of the wall thickness.
  • a good material utilization of the split-off material area as possible without excess residual material is achieved according to the invention in that the Nachformrolle and / or the intermediate form roller having an axial stop surface, by which an axial extent of the split-material region is limited.
  • the axial stop surface is formed on a recess through which an outer contour and / or an axial length of the hub to be formed is predetermined.
  • the axial abutment surface is removed from the tool body by a distance, which corresponds to the length of the hub to be formed.
  • An economical method implementation is inventively ensured by the fact that the intermediate form roller is delivered to the split material area, even before the gap roller has reached its final position. This ensures that, even when splitting off relatively long material regions, the split-off material region in the axial direction does not extend beyond the axial length of the hub to be formed.
  • the gap roller is delivered radially and simultaneously axially.
  • the thickness of the split-off material region can already be influenced during the splitting process. For example, this can be achieved that the gap roller is axially retracted with increasing radial feed into the workpiece body, so that a split-off material region forms with increasing wall thickness to the workpiece body towards.
  • a particularly efficient way of shaping the outer contour and / or the wall thickness of the split-off material region is according to the invention in that during splitting, the split-off material region flows along one side of the gap roller, which has at least one step.
  • a gap roller in which a subsequent to the acute-angled Trennsee side area is formed with a defined curve shape.
  • the separating edge is designed such that it has a gap angle of less than 45 °, preferably between 10 ° and 30.
  • the material web split off in this way can only flow along the contoured side region upon further radial infeed of the separating edge, with the outer contour of the material region correspondingly matching the contoured side region of the gap roller.
  • At least one step is formed on the side region.
  • the method described above can be carried out in a simple manner.
  • several stages may be provided, so that the material area that has been tuned in is provided established.
  • One step leads to an increase in friction. It can remain so more material near the transition to the workpiece body.
  • an intermediate forming roller which is characterized in that a recess with a radially extending stop surface, through which an axial length of the hub to be formed is predetermined, and a circumferentially extending shaping surface is provided, which is a concave Has waveform.
  • the concave curve shape is configured corresponding to the concave curve shape to be formed on the hub.
  • a flow-forming machine is further developed in that the previously described gap roller and / or the intermediate form roller described above is provided.
  • the rollers can be delivered radially and / or axially to the workpiece.
  • a workpiece 1 which in the present example is a flat metal blanks, but may also be a deep-drawn, forged, cast or otherwise preformed workpiece, clamped to a spinning chuck 45 by means of a counter-holder 43 centric to a rotational axis 14.
  • a drive not shown, and a spindle of a known flow-forming machine, the workpiece 1 is set in rotation, wherein on the outer edge of the workpiece 1, a conventional nip roller 10 is delivered with an acute-angled Trenn whatsoever 12.
  • the Nachformrolle 30 has a recess 34 with an axial stop surface 32 and an approximately axially extending shaping surface 36. This has a defined convex contour with which a desired curve shape is generated at a hub intermediate shape 4.
  • the Nachformrolle 30 is initially formed with its axial stop surface 32 so that the split material region 3 is limited in its axial extent.
  • the axial stop surface 32 has an axial distance to the workpiece 1, which already corresponds to the axial length of the hub to be formed.
  • a defined hub intermediate shape 4 By radially advancing the nip roller 10 and the intermediate form roller 30 to its common radial end position is a defined hub intermediate shape 4 according to Fig. 1c educated. This has on its outer side in cross-section on a defined non-linear waveform, which is an annular projection in the present example. According to the outer contour of the hub intermediate shape 4, a corresponding bulge is formed on the inside with the formation of an annular cavity.
  • a Nachformrolle 20 is delivered radially to the hub intermediate shape 4.
  • the Nachformrolle 20 in this case has a recess 24 with an axial stop surface 22, which are designed according to the contour of the hub 5 to be formed.
  • the hub 5 is finally formed, wherein the inner contour of the hub 5 is determined by the outer contour of the cylindrical counter-holder 43.
  • the Nachformrolle 20 or the anvil 43 may also have gears, grooves, etc., to form desired contours.
  • a nip roller 10 with an acute-angled separating edge 12 is delivered to a workpiece 1, wherein an approximately V-shaped material region 3 is split off.
  • the gap roller 10 need not be delivered to the outer edge of the workpiece 1, but can also be retracted in a central region of the workpiece.
  • the workpiece 1 can be provided with a different wall thickness over its radial direction, so that when differentiating the material region 3, a differentiated material thickness can be achieved.
  • a step 18 is formed on a side region 16, on which the split material is guided along. This connects two offset in cross-section, offset surfaces, 19a, 19b with each other.
  • the first gap roller surface 19a forms, with the opposite side region, the acute-angled separation edge 12, which for wear reduction has a radius which is preferably between 0.5 and 2 mm.
  • the split-off material region 3 is first guided on the first split-roller surface 19a until it reaches the step 18, which preferably has a step height of 0.5 to 3 mm, in accordance with the radial feed of the gap roller 10. Due to relatively large radii at the step 18, the split-off material flows over the step 18, forming a stepped radial outer contour of the split-off material region 3. Depending on the material and the delivery, the grading can also be more or less pronounced on the inside. It can also come due to increased friction of the stage 18 to Wanddikkenver selectedung, as in Fig. 3 is shown.
  • a side region 16 for guiding the branched material region 3 in cross-section is approximately arcuate.
  • an outwardly convex convex curve shape can be adjusted at the hub intermediate shape 4.
  • a projection 13 which may serve the effect of a previously described stage or as an axial abutment surface.
  • the gap roller is provided with a relatively large deflection radius. Due to the deflection of the split-off material and almost 90 °, the flow rate is achieved by the deflection and the associated increased friction a certain change in wall thickness of the split-off material.
  • one or more steps on the side area can be used in addition to a variety of variants.
  • the arched hub shape 4 is finally shaped in the manner described above by radially feeding a post-forming roller 20 to a cylindrical hub.

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

Claims (12)

  1. Procédé de formage sans enlèvement de copeau d'un moyeu cylindrique (5) sur une pièce à usiner (1) en forme de flan circulaire, dans lequel un rouleau de scission (10) ayant un bord tranchant (12) à angle aigu est approché de la pièce à usiner (1) tournant autour d'un axe de rotation (14) et, en conservant un corps de base, (2), une zone de matière (3) est séparée, la zone de matière (3) séparée étant d'abord pourvue d'une forme courbe définie avant le formage final en un moyeu (5),
    caractérisé en ce que la zone de matière séparée (3) est formée finalement en moyeu cylindrique (5) par au moins un rouleau de post-formage (20) qui présente une surface de butée axiale (22) par laquelle est limitée une longueur axiale du moyeu (5).
  2. Procédé selon la revendication 1, caractérisé en ce que, dès la séparation, la zone de matière (3) est pourvue de la forme courbe par le rouleau de scission (10).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'après la séparation et avant le formage final, au moins un rouleau intermédiaire (30) est approché, par lequel la zone de matière (3) séparée est pourvue de la forme courbe.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que , comme forme courbe, il est prévu un contour convexe, incurvé radialement vers l'extérieur.
  5. Procédé selon la revendication 3 ou 4, caractérisé en ce que le rouleau de formage intermédiaire (30) présente une surface de butée axiale (32) par laquelle une extension axiale de la zone de matière (3) séparée est limitée.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la surface de butée axiale (22, 32) est réalisée sur un évidement (24, 34) par lequel est imposé un contour extérieur du moyeu (5) devant être formé.
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le rouleau de post-formage (20) et/ou le rouleau de formage intermédiaire (30) est approché dans la zone de matière (3) séparée avant même que le rouleau de scission (10) ait atteint sa position finale.
  8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le rouleau de scission (10) est approché simultanément radialement et axialement.
  9. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que, lors de la séparation, la matière séparée s'écoule le long d'une face du rouleau de scission (10) qui présente au moins un gradin (18).
  10. Rouleau de scission présentant un bord tranchant (12) à angle aigu, en particulier pour un procédé selon l'une quelconque des revendications 1 à 9, dans lequel une zone latérale (16) faisant suite au bord tranchant (12) à angle aigu est réalisée avec une forme courbe définie,
    caractérisé en ce qu' au moins un gradin (18) est réalisé sur la zone latérale (16).
  11. Rouleau de formage intermédiaire, en particulier pour un procédé selon l'une quelconque des revendications 3 à 9, caractérisé en ce qu'il est prévu un évidement (34) ayant une surface de butée (32) d'extension radiale, par laquelle une longueur axiale du moyeu (5) à former est imposée, et une surface de façonnage (36) s'étendant dans la direction circonférentielle, qui présente une forme courbe concave.
  12. Machine de fluotournage, en particulier pour réaliser le procédé selon l'une quelconque des revendications 1 à 9, avec au moins un rouleau de scission (10) ayant un bord tranchant (12) à angle aigu et avec un mandrin de fluotournage (45) pour recevoir et tenir la pièce (1), dans lequel le mandrin de fluotournage (45) peut être entraîné en rotation par rapport au rouleau de scission (10),
    caractérisée en ce qu'un rouleau de scission (10) selon la revendication 10 et/ou un rouleau de formage intermédiaire (30) selon la revendication 11 est prévu.
EP20020013831 2002-06-21 2002-06-21 Méthode, rouleau et machine de fluotournage pour le formage d' un moyeu cylindrique sans enlèvement de copeaux Expired - Lifetime EP1382404B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE50212149T DE50212149D1 (de) 2002-06-21 2002-06-21 Verfahren, Rolle und Drückwalzmaschine zum spanlosen Anformen einer zylindrischen Nabe
EP20020013831 EP1382404B1 (fr) 2002-06-21 2002-06-21 Méthode, rouleau et machine de fluotournage pour le formage d' un moyeu cylindrique sans enlèvement de copeaux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20020013831 EP1382404B1 (fr) 2002-06-21 2002-06-21 Méthode, rouleau et machine de fluotournage pour le formage d' un moyeu cylindrique sans enlèvement de copeaux

Publications (2)

Publication Number Publication Date
EP1382404A1 EP1382404A1 (fr) 2004-01-21
EP1382404B1 true EP1382404B1 (fr) 2008-04-23

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Application Number Title Priority Date Filing Date
EP20020013831 Expired - Lifetime EP1382404B1 (fr) 2002-06-21 2002-06-21 Méthode, rouleau et machine de fluotournage pour le formage d' un moyeu cylindrique sans enlèvement de copeaux

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EP (1) EP1382404B1 (fr)
DE (1) DE50212149D1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2719563B2 (ja) * 1995-10-25 1998-02-25 日本イスエード株式会社 段付きプーリーの製造方法
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
JP3387831B2 (ja) * 1998-03-09 2003-03-17 小島プレス工業株式会社 円筒部が一体形成されてなる金属製品の製造方法
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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Publication number Publication date
DE50212149D1 (de) 2008-06-05
EP1382404A1 (fr) 2004-01-21

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