EP1382404A1 - 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
EP1382404A1
EP1382404A1 EP02013831A EP02013831A EP1382404A1 EP 1382404 A1 EP1382404 A1 EP 1382404A1 EP 02013831 A EP02013831 A EP 02013831A EP 02013831 A EP02013831 A EP 02013831A EP 1382404 A1 EP1382404 A1 EP 1382404A1
Authority
EP
European Patent Office
Prior art keywords
roller
split
splitting
hub
material area
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.)
Granted
Application number
EP02013831A
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German (de)
English (en)
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EP1382404B1 (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
Original Assignee
Leico GmbH and Co Werkzeugmaschinenbau
Leifeld Metal Spinning GmbH
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Publication date
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Application filed by Leico GmbH and Co Werkzeugmaschinenbau, Leifeld Metal Spinning GmbH filed Critical Leico GmbH and Co Werkzeugmaschinenbau
Priority to DE50212149T priority Critical patent/DE50212149D1/de
Priority to EP20020013831 priority patent/EP1382404B1/fr
Publication of EP1382404A1 publication Critical patent/EP1382404A1/fr
Application granted granted Critical
Publication of EP1382404B1 publication Critical patent/EP1382404B1/fr
Anticipated expiration legal-status Critical
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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 chipless molding a cylindrical hub on a workpiece, in which a Split roll with an acute-angled separating edge to the a rotating axis of a rotating workpiece is fed and inserted Material area is split off, with the split off Material area by at least one post-forming roll cylindrical hub is finally formed.
  • the invention relates continue to have a role in performing this procedure as well a pressure rolling machine with at least one split roller an acute-angled separating edge and with a chuck to pick up and hold the workpiece, using the chuck is driven to rotate relative to the split roller.
  • a generic state of the art goes for example from DE 41 15 423 A1.
  • a roller with an acute angle Separating edge which is also known as a splitting or cutting roller a material area in the Cross-section branched or split off in a V-shape.
  • the acute-angled separating edge can do the role relatively easy to penetrate into the workpiece, so that even minimal Forming forces necessary to feed the nip roll are. Due to the low forming forces, the material structure both of the remaining radial workpiece area as well as the branched workpiece area not too much heavily burdened. In particular, the risk of formation of Structural cracks within the workpiece structure remain small.
  • a method that is gentle on the workpiece is known from DE 198 49 981 A1 known, in which by means of a special forming roller a hub is formed without cutting.
  • the special forming roll includes an approximately rectangular separating edge and one itself immediately adjacent compression area, its External profile of the outer peripheral contour of the hub to be molded is adjusted.
  • the invention has for its object to provide a method, a roller and a flow-forming machine, which is provided with a hub structure particularly friendly and economical conformable.
  • the method according to the invention is characterized in that that before the final shaping the split material area with is given a defined curve shape.
  • the known methods found that when forming a V-shaped split Material area to a cylindrical hub over the axial length of the molded hub a different material structure formed. This is due to, that the material is deformed more at the free end of the hub and is claimed as in the transition area of the hub to the Workpiece body. The material also tends to shape rather towards the free end of the hub flow, so that only with a relatively large calibration effort a uniform wall thickness of the hub is established leaves.
  • the material area before Final shapes in a desired manner with regard to its Outer contour and / or its wall thickness can be set a hub without extensive calibration with a high Made uniform in terms of wall thickness and material structure become.
  • a cylindrical hub is in mind the invention to understand an axially projecting hub which also have gears on their outer or inner contours, Grooves, steps, etc. may have. These can be done at the same time with the final shaping without cutting.
  • the procedure can be carried out as cold or hot forming.
  • a particularly efficient process implementation exists according to the invention in that already when the Material area through the split roller with the curve shape is provided.
  • a split roll with a corresponding External contouring to produce the curve shape used.
  • curve shape in the sense of the invention is basically any deviating from a straight outer contour line Understand contour shape. As particularly useful According to the invention, however, it has been found that as a curve shape, a convex curve that is curved radially outwards Contour is provided. This can be an arc shape or be hump-shaped steps or heels, which if necessary be linked with a wall thickness thickening can.
  • This convex outer contour of the intermediate hub shape the possibility is created of the external material relatively easy in the direction of the workpiece body to press, so that on the one hand the structure on the free End of the hub relieved and both the structure in the transition area the hub to the base body both in terms of a Structural strengthening as well as with regard to a uniform Training the wall thickness is improved.
  • the post-forming roll and / or the intermediate form roller has an axial stop surface have through which an axial extension of the separated material area is limited.
  • the axial stop surface is formed on a recess through which an outer contour and / or an axial length of the to be molded Hub is specified.
  • the axial stop surface is thereby from the tool body by a distance removed, which corresponds to the length of the hub to be molded.
  • An economical process implementation is according to the invention this ensures that the postforming roller and / or the intermediate form roller to the split material area is delivered even before the splitting roll Has reached the end position. This ensures that even when cutting off longer material areas, the split off Material area not in the axial direction the axial length of the hub to be molded also extends.
  • the nip roll is fed radially and axially at the same time. hereby can also determine the thickness of the material area that is split off be influenced during the splitting process. For example can thereby be achieved that the split roll with increasing radial infeed axially in the Workpiece body is retracted, so that a split Material area with increasing wall thickness to Forms basic workpiece body.
  • a particularly efficient way of designing the Outer contour and / or the wall thickness of the split material area according to the invention is that when splitting off the separated material area along a Side of the split roller flows, which is at least one step having.
  • a split roller is provided according to the invention, which is characterized by the fact that a acute-angled separating edge adjacent side area with a defined curve shape is formed.
  • the separating edge is designed so that it has a gap angle of below 45 °, preferably between 10 ° and 30 °, having.
  • the web of material split off in this way can only be further radial infeed of the separating edge along the Contoured side area flow, the outer contour of the material area according to the contoured Side area of the split roller adjusts.
  • At least one level is formed on the side area.
  • Splitting roll can simplify the process described above Way to run.
  • several Steps may be provided so that there is a corrugated material area established.
  • One step leads to an increase in friction. So there can be more material near the The transition to the workpiece body remains.
  • an intermediate form roller is provided according to the invention, which is characterized in that a recess with a radial stop surface through which an axial length of the hub to be molded is specified, and a circumferential shaping surface is provided, which has a concave curve shape.
  • the concave curve shape corresponds to that configured concave curve shape to be formed on the hub.
  • a spinning roll machine that the split roll described above and / or the intermediate form roller described above is provided.
  • the rollers can radially and / or axially on the workpiece be delivered.
  • a workpiece 1 which in the present Example is a flat metal blank, but also a deep-drawn one, forged, cast or otherwise preformed Workpiece can be on a chuck 45 by means of a counter-holder 43 centered on an axis of rotation 14 excited.
  • a drive not shown and a spindle of a known press rolling machine the workpiece 1 set in rotation, being on the outer edge of the workpiece 1 with a conventional splitting roller 10 an acute-angled separating edge 12 is delivered.
  • the radial feed of the nip roll 10 becomes a material area 3 split off approximately V-shaped, as in Fig. 1b is shown.
  • the postforming roller 30 has one Recess 34 with an axial stop surface 32 and one approximately axially extending shaping surface 36. This has a defined convex contour with which a desired one Generated curve shape on an intermediate hub shape 4 becomes.
  • the postforming roller 30 is with its axial stop surface 32 initially designed so that the split off Material area 3 limited in its axial extent is.
  • the axial stop surface 32 has an axial Distance to the workpiece 1, which is already the axial Corresponds to the length of the hub to be molded.
  • a defined intermediate hub shape 4 By radially feeding the split roller 10 and the intermediate form roller 30 to their common radial end position is a defined intermediate hub shape 4 according to Fig. 1c formed.
  • a postforming roller 20 is applied radially to the final shaping of the hub the hub intermediate form 4 delivered.
  • the postforming roller 20 has a recess 24 with an axial stop surface 22 on which according to the contour of the to be molded Hub 5 are designed.
  • the post-forming roller 20 or the counter-holder 43 can also have gears, grooves, etc. to achieve the desired Form contours.
  • FIGS. 2a and 2b Another way for a firm and reliable Forming a hub 5 at the transition to the base body 2 Workpiece 1 is shown in FIGS. 2a and 2b.
  • the split roll 10 does not need to be fed on the outer edge of the workpiece 1 to become, but can also be in a medium range of Workpiece can be retracted.
  • the workpiece 1 with a different wall thickness over its radial direction so that when splitting off of the material area 3 a differentiated material thickness can be achieved.
  • nip roll 10 which in detail 3 is shown on a side area 16, along which the split material is guided a stage 18 is formed. This connects two in the Cross-section parallel, offset surfaces, 19a, 19b with each other.
  • the first nip roller surface 19a forms with the opposite one Side area the acute-angled separating edge 12, which has a radius to reduce wear, which is preferably between 0.5 to 2 mm.
  • the separated material area 3 is first on the first Split roller surface 19a performed until this accordingly the radial feed of the nip roller 10 reaches stage 18, which is preferably a step height of 0.5 to 3 mm having. Due to relatively large radii at level 18 the cleaved material flows over step 18, with a stepped radial outer contour of the split Material area 3 is created. Depending on the material and the The grading can also be delivered on the inside train more or less strong. It can also be due to an increased level 18 friction to a change in wall thickness come, as shown in Fig. 3.
  • transition area between the to be molded Hub and the body of the workpiece a radial outward curve shape or a material bulge created on the split workpiece area 3, which by means of the subsequent final shaping a postforming roller 20 according to FIG. 2b to a desired one good shape of the hub 5 in the transition area to the base body 2 of the workpiece 1 leads.
  • the material thickness can also be influenced the invention can be achieved in that the nip roll 10 simultaneously axially during their radial infeed is proceeded. This forms on the radially extending Base body 2 of the workpiece 1 an oblique front from, as shown in Fig. 5. This can also the wall thickness of the separated material area 3 in be influenced in a desired way.
  • FIGS. 6 and 7 Further possibilities for the formation of an inventive Nip roll 10 can be seen from FIGS. 6 and 7, a side region 16 for guiding the branched Material area 3 is approximately arcuate in cross section is. Through this side area 16 one can convex curve shape on the outside of the intermediate hub shape 4 can be set. In the modification according to FIG. 7a on the split roller 10 with the arcuate side region 16 a projection 13 is arranged, which has the effect of a previously described stage or as an axial stop surface can serve.
  • the split roll is provided with a relatively large deflection radius.
  • the flow rate through the deflection and the associated increased friction a certain change in wall thickness of the split material reached.
  • one or more steps to the side area can be used for a wide range of variants.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
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 true EP1382404A1 (fr) 2004-01-21
EP1382404B1 EP1382404B1 (fr) 2008-04-23

Family

ID=29762603

Family Applications (1)

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

Country Status (2)

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

Citations (7)

* 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
JPH09122816A (ja) * 1995-10-25 1997-05-13 Nippon Isueede Kk 段付きプーリーの製造方法
US5829291A (en) * 1996-05-17 1998-11-03 Kojima Press Industry Co., Ltd. Apparatus and process for forming metal member including bases portion and cylindrical portion formed on outer surface of the base portion such that the cylindrical portion is integral with the base portion
DE19849981A1 (de) * 1998-10-29 1999-04-15 Leico Werkzeugmaschb Gmbh & Co Verfahren zum Formen einer Nabenscheibe und Drückrolle zur Verwendung beim Formen einer Nabenscheibe
JPH11320009A (ja) * 1998-03-09 1999-11-24 Kojima Press Co Ltd 円筒部が一体形成されてなる金属製品の製造方法
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
DE10121546A1 (de) * 2001-05-03 2001-11-29 Leico Werkzeugmaschb Gmbh & Co Verfahren und Drückrolle zum Anformen einer Nabe

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09122816A (ja) * 1995-10-25 1997-05-13 Nippon Isueede Kk 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
US5829291A (en) * 1996-05-17 1998-11-03 Kojima Press Industry Co., Ltd. Apparatus and process for forming metal member including bases portion and cylindrical portion formed on outer surface of the base portion such that the cylindrical portion is integral with the base portion
JPH11320009A (ja) * 1998-03-09 1999-11-24 Kojima Press Co Ltd 円筒部が一体形成されてなる金属製品の製造方法
DE19849981A1 (de) * 1998-10-29 1999-04-15 Leico Werkzeugmaschb Gmbh & Co Verfahren zum Formen einer Nabenscheibe und Drückrolle zur Verwendung beim Formen einer Nabenscheibe
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
DE10121546A1 (de) * 2001-05-03 2001-11-29 Leico Werkzeugmaschb Gmbh & Co Verfahren und Drückrolle zum Anformen einer Nabe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 09 30 September 1997 (1997-09-30) *

Also Published As

Publication number Publication date
DE50212149D1 (de) 2008-06-05
EP1382404B1 (fr) 2008-04-23

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