EP1163961B1 - Procédé et dispositif de fabrication d'un élement de transmission - Google Patents

Procédé et dispositif de fabrication d'un élement de transmission Download PDF

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Publication number
EP1163961B1
EP1163961B1 EP01102425A EP01102425A EP1163961B1 EP 1163961 B1 EP1163961 B1 EP 1163961B1 EP 01102425 A EP01102425 A EP 01102425A EP 01102425 A EP01102425 A EP 01102425A EP 1163961 B1 EP1163961 B1 EP 1163961B1
Authority
EP
European Patent Office
Prior art keywords
tool
blank
round blank
round
wall
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
EP01102425A
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German (de)
English (en)
Other versions
EP1163961B2 (fr
EP1163961A1 (fr
Inventor
Rudolf 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
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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Application filed by Leico GmbH and Co Werkzeugmaschinenbau filed Critical Leico GmbH and Co Werkzeugmaschinenbau
Publication of EP1163961A1 publication Critical patent/EP1163961A1/fr
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Publication of EP1163961B1 publication Critical patent/EP1163961B1/fr
Publication of EP1163961B2 publication Critical patent/EP1163961B2/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
    • B21D53/28—Making other particular articles wheels or the like gear wheels
    • 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
    • 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 on the one hand to a method for the production a gear part with a hub from a round blank, which on a tool of a rotating drivable spindle Pressing machine is arranged and clamped and by means of at least one pressure roller reduces the thickness of the round blank and the resulting material is transformed into a hub becomes.
  • the invention relates to a pushing device with a rotating drivable spindle, at least one adjustable spinning roller and one attached to the spindle Tool for holding a round blank.
  • a generic method and a generic device can be seen, for example, from DE-C-198 49 981.
  • the blank is against an annular tool by means of a cylindrical one Pressing element pressed.
  • axial clamping can be an outer area of a Ronde can be processed very well.
  • axial clamping can, however, be within the trainee Do not avoid a certain radial disc area, which may be in a later step must be removed.
  • a device with a separate Abutment chuck is further apparent from DE-C-44 44 526. The abutment chuck that works with the tool can be placed on the circumferential edge of the round blank.
  • a method is known from EP-A-0 815 983 and US-A-5,987,952 known in which a circular blank is inserted into a receptacle and is axially clamped by means of a central pressure element.
  • a holding roller holds the while the hub is being formed outer edge of the blank in the picture. The holding roll hinders free access to the center of the round blank.
  • the invention is based on the object of specifying a method and a device with which simple and reliable holding of the workpiece on the tool is provided, at the same time ensuring a high degree of design freedom when forming the hub.
  • the task is accomplished on the one hand by a procedure with the Features of claim 1 solved. On the other hand, the task is performed by a device with the features of claim 10 solved.
  • the method according to the invention is characterized in that that the circular blank is clamped by axial pressure of a blank area of the blank against the tool and simultaneously expanding the circular blank radially and that when expanding the circular blank radially this against an annular circumferential direction Wall is formed on the tool, the round blank non-positively and / or positively held on the tool becomes.
  • a basic idea of the invention is the tool to be provided with an annular wall, which only slightly is larger than the blank used in it.
  • the Ronde is then replaced by a axial contact force radially expanded and thus against the annular wall either radially outwards or radially shaped inside. This results in a force and / or positive connection between the blank and the tool.
  • the blank is then clamped to the tool through an interaction between the formed blank and the surrounding annular wall or a central centering pin reached on the tool.
  • the device can thus be trained easily and inexpensively, the whole Area of the circular blank machined free from the spinning roller can be. It is a particularly high degree of design freedom given for machining the round blank and for the hub.
  • the with the exception of the pressure element basically be constructed as in the the applicant declining DE 198 49 981 C1 is described.
  • the ring-shaped heel can be this embodiment directly on the front of the Be trained tool.
  • the circumferential edge of the face of the tool with a chamfer can be provided, which in turn in the axially preceding paragraph transforms.
  • the outer edge region of the round blank in the axial direction be reshaped, the bevel angle being the bend angle of the edge area of the circular blank.
  • the shoulder is dimensioned in the axial direction so that it is preferably over the face of the tool survives.
  • a preferred development of the invention consists in that reducing the thickness of the blank by radial feeding a spinning roller, the spinning roller at the same time the blank with a defined axial force presses axially against the tool.
  • the spinning roller thus also has an axial force component on which a non-rotatable connection between the blank and the tool supported.
  • a particularly reliable process sequence is the subject of the invention in that until the generation of the Force and / or form-fit the blank using a separate Holding device, in particular a magnetic clamping device or a vacuum chuck on the tool is held.
  • a separate Holding device in particular a magnetic clamping device or a vacuum chuck on the tool
  • a controllable Electromagnetic coil on the tool or the arrangement of Vacuum channels on the tool open to the workpiece, which are a vacuum generator connected to the line the round blank can be inserted into the ring Tool can be fixed.
  • the final clamping takes place then according to the invention by pressing the pressure roller and reshaping the edge area of the circular blank in an axial Undercut area and / or radial driver element on the ring-shaped wall of the tool.
  • the pressing element Support hub material when molding the hub.
  • the pressing element is designed so that the outer contour of the pressing element has an area that corresponds to an area the inner contour of the hub to be formed corresponds.
  • the pressing element is used in this embodiment So as a tool mandrel, with the help of the inner contour of the This is how the hub is preformed while the hub is being shaped is that at most a comparatively minor Reworking the hub is required.
  • the pressing element with one from the front protruding pin of the tool engages, through a receiving opening formed on the round blank protrudes. After the radial expansion to hold the blank on The pressing element is moved away by the tool.
  • the pin provided on the tool the hub material support when shaping the hub similar to the previous one described embodiment, the outer contour of the pin has an area that corresponds to an area of the inner contour corresponds to the hub to be formed, so that here too at best a slight reworking of the hub a later date is required.
  • an annular, in Circumferential direction wall is formed on the the blank by radial expansion non-positively and / or positively is mountable, and that an ejector device is provided.
  • the ring-shaped wall of the tool points an inner diameter which is slightly larger than the outer diameter of the round blank is such that an almost backlash-free insertion of the blank is granted.
  • This annular wall will position the exact location Ronde reached on the spindle, being by radial expansion the blank is a non-positive and / or positive, non-rotatable connection of the circular blank with the tool and thus can be generated with the spindle.
  • the ejector device which in particular an axially movable stamp or a support element allows the round blank to be removed easily.
  • the wall is formed on an annular shoulder, the axially with respect to the end face of the tool protrudes. It is also possible to on the front of the Tool form a circumferential groove, the one groove wall at least partially the one running in the circumferential direction Wall forms.
  • the profiling can be in an axial undercut or in the arrangement of radially directed driver elements formed along the inside of the annular wall his.
  • the driver elements can have a toothing, in particular form spur gear teeth on the workpiece.
  • the driver elements run in the axial direction trained that an ejector axially the workpiece can remove the tool.
  • Fig. 1 shows a sectional view of a first embodiment a pressing device 10 for producing a Gear part 12 with hub 14 from a blank 16.
  • the pressing device 10 is in Fig. 1 in various stages of the process shown. So shows the left of the axis of rotation R of the pushing device 10 can be seen the Pushing device 10 when tensioning the blank 16. The right the view seen from the axis of rotation R shows the Pushing device 10 during the molding of the hub 14.
  • the pressing device 10 has a tool 18, which by means of a drive, not shown, about the axis of rotation R is rotatable.
  • a groove 22 is formed concentrically to the axis of rotation R.
  • a groove wall 24 with a greater radial distance from Rotation axis R runs at least approximately parallel to Axis of rotation R and forms a wall, the purpose of which later will be explained later.
  • An inner groove wall 26 with less radial distance to the axis of rotation R goes under formation a curve in the end face 20.
  • the embodiment is the outer groove wall 24 distance smoothly formed.
  • outer groove wall 24 shaped elements such as teeth, grooves or similar form, to form fit with the one to be formed later Manufacture blank 16.
  • the Groove base of the groove 22 provided with corresponding shaped elements his.
  • the tool 18 is also concentric to the axis of rotation R a cylindrical ejector 28 is slidably received, with which the finished transmission part 12 after completion of the pressure rolling process can be released from the tool 18.
  • a center hole is also concentric to the axis of rotation R. 30 formed in the ejector 28, which is for receiving a centering pin 32 of a holding element 34 serves, as Fig. 1 shows.
  • the holding element 34 has one adjoining the centering pin 32 supporting section 36 with a round cross-section, which in turn in a holding device 38 passes.
  • the pressing device 10 For shaping the hub 14, the pressing device 10 a spinning roller 40, which in a common rotation of the tool 18 with the holding element 34 radially in the direction is delivered to the center of the blank 16.
  • the Press roller 40 has a cutting edge 42, the to the cutting edge 42 adjacent peripheral surfaces of the Pinch roller 40 at an acute angle.
  • To the Cutting edge 42 is followed by a compression area 44 which in turn limited by a projection 46 of the spinning roller 40 is.
  • the blank is first 16 attached to the end face 20 of the tool 18 and that axially movable holding element 34 against the end face 20 moved so that the centering pin 32 by one on the Ronde 16 trained receiving opening 48 is guided and enters the centering mold 30.
  • the holding element 34 is thereby moved axially in the direction of the end face 20, that at the transition between the centering pin 32 and the Support portion 36 formed paragraph 50 on the front the blank 16 abuts and so the blank 16 against the tool 18 preloaded.
  • the tool 18 and the holding element 34 is rotated and the spinning roller 40 delivered, whereby the circular blank 16 extends radially and molded into the groove 22 with its edge region becomes. In this way, the blank 16 is non-positively the end face 20 of the tool 18 clamped.
  • the pressure roller 40 becomes radial in the direction of the axis of rotation R moves, the cutting edge 40 with the Round 16 comes into engagement.
  • the radial delivery of the Press roller 40 is partially separated material from the blank 16 and guided along the compression area 44 so that starting from the round blank 16, a revolving, while of the delivery process always changing collar.
  • the axial flow of material is through the projection 46 Press roller 40 limited.
  • the hub 14 turns on the gear part 12 to be manufactured from the blank 16 is formed, the holding element 34 serves as a tool mandrel the transition between the centering pin 32 and the Support section 36, on which the hub 14 is formed, at least partly for shaping the later inner contour Inner contour of the hub 14 is used.
  • the spinning roller 40 moved away from the forming point, the holding element 34 Move away from tool 18 and then the finished one Gear part 12 using ejector 28 from tool 18 solved. This will release the finished gear part 12 due to the curvature on the groove wall 26 with little radial Distance easier because of the edge area of the gear part 12 is also rounded at the bottom.
  • FIGS. 2 and 3 show a second embodiment a pushing device 60, which is essentially constructed the structure of the pressing device 10 of the first embodiment like.
  • the pushing device 60 differentiates only compared to the pressing device 10 the ejector 62 used and the holding element used 64.
  • the pressing device 60 is from the front the ejector 62 axially from a centering pin 66, the arranged concentrically to the axis of rotation R of the tool 18 is.
  • the holding element 64 also has a concentric centering opening formed to the axis of rotation R. 68 with which the centering pin 66 engages can be brought, as Figure 2 shows.
  • the blank 16 is also its receiving opening 48 initially on the centering pin 66 placed. Then the holding element 64 is against the tool 18 moves, the centering opening 68 with the centering pin 66 comes into engagement.
  • the holding element 64 is biased axially against the tool 18 so strongly that the blank 16 rotatably. with the tool 18 and the holding element 64 is connected. Then the tool 18 and the holding element 64 in rotation and how in the first embodiment, using the spinning roller 40 the blank 16 is initially expanded radially. Through the radial Widening the circular blank 18 is molded into the groove 22, so that there is a positive connection between the blank 16 and the tool 18 forms.
  • the centering pin 66 is used here as a tool mandrel for the hub 14 to be formed appropriate design of the centering pin 66 can this way, a hub 14 can be formed, the one Has through hole with a constant diameter.
  • a pushing device can be designed in accordance with the invention.
  • previously described pushing devices additionally with magnetic clamping device or vacuum clamping devices.

Landscapes

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

Claims (10)

  1. Procédé de fabrication d'un élément de transmission (12) avec un moyeu (14) à partir d'un flan (16), qui est placé et serré sur un outil (18) d'une broche pouvant être entraínée en rotation d'une machine de repoussage au tour (10 ; 60), une épaisseur du flan (16) est réduite au moyen d'au moins un rouleau de repoussage (40) et le matériau en résultant est transformé en moyeu (14),
    caractérisé    en ce que le serrage du flan (16) est effectué par pressage axial d'une partie de bord du flan (16) contre l'outil (18) et élargissement radial simultané du flan (16), et
        en ce que, lors de l'élargissement radial du flan (16), celui-ci est formé contre une paroi annulaire (24) s'étendant dans la direction circonférentielle sur l'outil (18), le flan (16) étant tenu sur l'outil par adhérence et/ou par engagement positif.
  2. Procédé selon la Revendication 1, caractérisé en ce que la paroi s'étendant dans la direction circonférentielle fait le tour complet et est formée par un épaulement annulaire qui forme saillie par rapport à la face frontale de l'outil contre laquelle le flan est appuyé lors de l'élargissement radial.
  3. Procédé selon la Revendication 1 ou 2, caractérisé en ce que, sur la face frontale (20) de l'outil (18) contre laquelle le flan (16) est appuyé lors de l'élargissement radial est formée une rainure circonférentielle (22) dont une paroi de rainure annulaire (22) forme au moins partiellement la paroi s'étendant dans la direction circonférentielle.
  4. Procédé selon la Revendication 1, 2 ou 3, caractérisé en ce que la réduction de l'épaisseur du flan (16) s'effectue par approche radiale du rouleau de repoussage (40), le rouleau de repoussage (40) pressant simultanément le flan (16) axialement avec une force axiale définie contre l'outil (18).
  5. Procédé selon l'une quelconque des Revendications 1 à 4, caractérisé en ce que, jusqu'à l'établissement de l'engagement positif et/ou par adhérence, le flan (16) est tenu contre l'outil au moyen d'un dispositif de maintien séparé, en particulier un dispositif de serrage magnétique ou un dispositif de serrage par vide.
  6. Dispositif de repoussage au tour, en particulier pour appliquer le procédé selon l'une quelconque des Revendications 1 à 5, avec
    une broche pouvant être entraínée en rotation,
    au moins un rouleau de repoussage (40) réglable, et
    un outil (18) rapporté sur la broche pour tenir un flan (16),
        caractérisé en ce que, sur l'outil (18), est formée une paroi annulaire (24) s'étendant dans la direction circonférentielle, contre laquelle le flan (16) peut être tenu par engagement positif et/ou par adhérence par élargissement radial, et en ce qu 'un dispositif d'éjection est prévu sur l'outil.
  7. Dispositif de repoussage au tour selon la Revendication 6, caractérisé en ce q ue la paroi s'étendant dans la direction circonférentielle est formée d'un épaulement annulaire qui forme saillie par rapport à la face frontale de l'outil contre laquelle le flan vient au moins partiellement se placer lors du maintien.
  8. Dispositif de repoussage au tour selon la revendication 6 ou 7, caractérisé en ce que sur la face frontale (20) de l'outil (18) contre laquelle le flan (16) vient au moins partiellement se placer lors du maintien est formée une rainure circonférentielle (22) dont une paroi (24) de rainure forme au moins partiellement la paroi s'étendant dans la direction circonférentielle.
  9. Dispositif de repoussage au tour selon la Revendication 6, 7 ou 8, caractérisé en ce qu 'un profilage est réalisé sur une face circonférentielle de la paroi annulaire tournée vers le flan afin d'établir un engagement positif.
  10. Dispositif de repoussage au tour selon l'une quelconque des Revendications 6 à 8, caractérisé en ce qu 'il est prévu sur l'outil, pour serrer au moins provisoirement le flan, un dispositif de maintien conformé en dispositif de serrage magnétique ou dispositif de serrage par vide.
EP01102425A 2000-06-13 2001-02-02 Procédé et dispositif de fabrication d'un élement de transmission Expired - Lifetime EP1163961B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10029005 2000-06-13
DE10029005A DE10029005A1 (de) 2000-06-13 2000-06-13 Verfahren und Drückvorrichtung zur Herstellung eines Getriebeteiles

Publications (3)

Publication Number Publication Date
EP1163961A1 EP1163961A1 (fr) 2001-12-19
EP1163961B1 true EP1163961B1 (fr) 2002-06-05
EP1163961B2 EP1163961B2 (fr) 2010-03-03

Family

ID=7645517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01102425A Expired - Lifetime EP1163961B2 (fr) 2000-06-13 2001-02-02 Procédé et dispositif de fabrication d'un élement de transmission

Country Status (3)

Country Link
EP (1) EP1163961B2 (fr)
AT (1) ATE218403T1 (fr)
DE (2) DE10029005A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006022726A1 (de) † 2006-04-21 2007-11-08 Wf-Maschinenbau Und Blechformtechnik Gmbh & Co Kg Verfahren zur Herstellung eines Fahrzeugrades aus Stahl

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4444526C1 (de) * 1994-11-30 1995-11-30 Wf Maschinenbau Blechformtech Drückvorrichtung zur spanlosen Herstellung einer Nabe eines die Nabe aufweisenden Getriebeteiles
DE19524089C1 (de) † 1995-07-01 1996-09-05 Wf Maschinenbau Blechformtech Verfahren und Vorrichtung zur Herstellung eines Getriebeteiles aus einer Metallronde
US5951422A (en) * 1996-06-24 1999-09-14 The Gates Corporation Hub and pulley with radially inward annular collar
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

Also Published As

Publication number Publication date
EP1163961B2 (fr) 2010-03-03
EP1163961A1 (fr) 2001-12-19
DE10029005A1 (de) 2001-01-18
ATE218403T1 (de) 2002-06-15
DE50100005D1 (de) 2002-07-11

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