EP2127777B1 - Device and method for generating or processing workpieces from a blank mould, in particular for casting internal profiles or internal gears - Google Patents

Device and method for generating or processing workpieces from a blank mould, in particular for casting internal profiles or internal gears Download PDF

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Publication number
EP2127777B1
EP2127777B1 EP20080013579 EP08013579A EP2127777B1 EP 2127777 B1 EP2127777 B1 EP 2127777B1 EP 20080013579 EP20080013579 EP 20080013579 EP 08013579 A EP08013579 A EP 08013579A EP 2127777 B1 EP2127777 B1 EP 2127777B1
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EP
European Patent Office
Prior art keywords
preform
chuck
mandrel
shaping
unit
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EP20080013579
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German (de)
French (fr)
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EP2127777A1 (en
Inventor
Karl Heinz Köstermeier
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REPKON MACHINE AND TOOL INDUSTRY AND TRADE INC.
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Repkon Machine and Tool Industry and Trade Inc
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Priority to EP20080009558 priority Critical patent/EP2127775B1/en
Application filed by Repkon Machine and Tool Industry and Trade Inc filed Critical Repkon Machine and Tool Industry and Trade Inc
Priority to EP20080013579 priority patent/EP2127777B1/en
Priority claimed from CN2009801289961A external-priority patent/CN102105240A/en
Publication of EP2127777A1 publication Critical patent/EP2127777A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14Spinning
    • B21D22/16Spinning over shaping mandrels or formers

Description

  • Die Erfindung betrifft eine Vorrichtung zum Herstellen oder Bearbeiten von Werkstücken aus einer Vorform, insbesondere zum Anformen von Innenprofilen oder Innenverzahnungen nach dem Oberbegriff des Anspruchs 1 sowie ein entsprechendes Verfahren.The invention relates to a device for producing or processing workpieces from a preform, in particular for molding of internal profiles or internal gears according to the preamble of claim 1 and a corresponding method.
  • Eine Vorrichtung zum Drückwalzen ist in EP 1 004 373 B1 beschrieben. Entsprechende Vorrichtungen werden eingesetzt, um an ein Werkstück, insbesondere Ringe für Planetengetriebe, eine Innenverzahnung anzuformen. Dabei wird durch Ansetzen von Drückwalzen an der Vorform Material aus derselben gegen die Negativform des Drückfutters verdrängt. Die dabei wirkenden Kräfte wirken auf die Außenverzahnungen des Drückfutters, so dass diese brechen können. Im Stand der Technik wird daher vorgeschlagen, einen Distanzring aus verformbarem Material beabstandet vom freien Ende des Drückfutters vorzusehen. Der verformbare Distanzring paßt sich beim Umformprozeß an das Außenprofil des Drückfutters an. Der Distanzring nimmt also die beim Umformen der Vorform entstehenden Kräfte wenigstens teilweise auf.A device for spin forming is in EP 1 004 373 B1 described. Corresponding devices are used to form an internal toothing on a workpiece, in particular rings for planetary gear. It is displaced by applying pressure rollers on the preform material from the same against the negative mold of the spinning chuck. The forces acting on the outer teeth of the spinning chuck, so that they can break. In the prior art it is therefore proposed to provide a spacer ring of deformable material spaced from the free end of the spinning chuck. The deformable spacer fits in the forming process to the outer profile of the spinning chuck. The spacer thus absorbs at least partially the forces resulting from the forming of the preform.
  • Nachteilig ist hier, dass immer ein Distanzring und eine Passfeder erforderlich sind, was die Anordnung verkompliziert. Zudem entstehen hohe Umformtemperaturen, die die zum Umformen und Herstellen eines Werkstücks benötigte Zeit deutlich anheben.The disadvantage here is that always a spacer ring and a feather key are required, which complicates the arrangement. In addition, high forming temperatures arise, which significantly increase the time required for forming and producing a workpiece.
  • Weiterhin ist aus der gattungsbildenden DE 100 62 002 A1 eine Drückwalzvorrichtung bekannt, bei der ein Anschlagelement vorgesehen ist, welches eine definierte Torsionsspannung auf die Vorform aufbringt, die den durch das Drückwalzen verursachten Torsionskräften entgegen wirkt. Hierdurch soll das Futter entlastet werden; nachteilig ist jedoch, dass aufgrund der aufzubringenden Gegenkräfte eine stärkere Belastung der Drückwalzvorrichtung selbst verursacht wird und weiterhin entsprechende konstruktive Maßnahmen zur Erzeugung der Gegendrehbewegung des Anschlagelements notwendig sind.Furthermore, from the generic DE 100 62 002 A1 a flow-forming device, in which a stop element is provided, which applies a defined torsional stress on the preform, which counteracts the torsional forces caused by the spin forming. This should relieve the feed; The disadvantage, however, is that due to the applied opposing forces a greater load on the flow-forming device itself is caused and further appropriate design measures for generating the counter-rotational movement of the stop element are necessary.
  • Aufgabe der Erfindung ist es, die eingangs genannte Vorrichtung dahingehend zu verbessern, dass die erwähnten Nachteile nicht auftreten.The object of the invention is to improve the device mentioned in such a way that the mentioned disadvantages do not occur.
  • Gelöst wird diese Aufgabe mit den Merkmalen des Anspruchs 1 bzw. durch ein Verfahren mit den Merkmalen des Anspruchs 13. Vorteilhafte Ausführungsformen finden sich in den abhängigen Ansprüchen.This object is achieved with the features of claim 1 and by a method having the features of claim 13. Advantageous embodiments can be found in the dependent claims.
  • Erfindungsgemäß ist das Futter nicht nur zusammen mit dem Dorn verschieblich, sondern auch radial, d.h. parallel zur oder identisch mit der Längsachse der erfindungsgemäßen Vorrichtung, drehbar gelagert. Durch den Materialfluss des durch Drücken aus der Vorform fließenden Materials fließt dies aufgrund der Rotation des Dornes nicht nur axial, sondern der Materialfluß erhält auch eine Radial- bzw. Tangentialkomponente. Durch die Drehbarkeit des Futters führen die radial auf das Futter wirkenden, durch verdrängtes Material hervorgerufenen Kräfte nicht zu einer Überbeanspruchung des Futters (und ggf. darauf angebrachter Zähne), sondern dazu, dass sich das Futter in Richtung der ausgeübten Kräfte bewegt. So kann das Futter bei zu hohem Druck immer nachgeben, so dass Beschädigungen, wie etwa das Abbrechen von Zähnen, vermieden werden. Zudem hat sich gezeigt, dass aufgrund der Erfindung die Reibung in radialer Richtung des Dornes wesentlich reduziert wird und so wesentlich geringere Umformtemperaturen entstehen als bei herkömmlichenAccording to the invention, the lining is displaceable not only together with the mandrel, but also radially, ie rotatably parallel to or identical to the longitudinal axis of the device according to the invention. As a result of the rotation of the mandrel, due to the material flow of the material flowing by pressing from the preform, this not only flows axially, but the material flow also receives a radial or tangential component. Due to the rotatability of the chuck, the forces acting radially on the chuck and caused by displaced material do not lead to overstressing of the feed (and any teeth mounted thereon) but to cause the chuck to move in the direction of the applied forces. Thus, the lining can always give way to excessive pressure, so that damage, such as the breaking off of teeth, are avoided. In addition, it has been found that due to the invention, the friction in the radial direction of the mandrel is substantially reduced and so much lower forming temperatures arise than in conventional
  • Verfahren, so daß die Umformung wesentlich schneller durchgeführt und mehr Werkstücke pro Zeit fertig gestellt werden können.Method, so that the conversion can be performed much faster and more workpieces per time can be completed.
  • Die Erfindung wird nachfolgend anhand der Zeichnungen der Figuren 1 bis 13B schematisch näher erläutert.
  • Figur 1 -
    zeigt eine Ansicht durch die erfindungsge- mäße Vorrichtung im Längsschnitt beim Auf- spannen der Vorform,
    Figur 2 -
    zeigt die erfindungsgemäße Vorrichtung mit eingespannter Vorform,
    Figur 3 -
    zeigt die erfindungsgemäße Vorrichtung un- mittelbar vor dem Umformen,
    Figur 4 -
    zeigt die erfindungsgemäße Vorrichtung mit teilweise bearbeiteter Vorform,
    Figur 5
    - zeigt die erfindungsgemäße Vorrichtung am Ende des Umformvorganges,
    Figur 6 -
    zeigt die erfindungsgemäße Vorform bei der Entnahme des fertigen, aus der Vorform her- gestellten Werkstücks,
    Figur 7 -
    zeigt eine Vorform,
    Figur 8 -
    zeigt eine teilweise umgeformte Vorform,
    Figur 9 -
    zeigt das Werkstück nach dem Umformvorgang,
    Figur 10 -
    zeigt einen Querschnitt parallel zur Ma- schinenquerachse z (links) durch einen Teil der Vorform und der Umformeinrichtung ent- lang einer Schnittlinie B-B und einen Schnitt längs der Maschinenlängsachse x (rechts),
    Figur 11 -
    zeigt einen Querschnitt parallel zur Ma- schinenquerachse z (links)durch einen Teil der Vorform und der Umformeinrichtung ent- lang einer Schnittlinie A-A und einen Schnitt längs der Maschinenlängsachse x (rechts),
    Figuren 12 (A) und (B) -
    zeigen schematisch die radiale bzw. axiale Bewegung/Verformung eines Materialvolumens im in Figur 10 gezeigten Bereich,
    Figuren 13
    (A)
    und (B) -
    zeigen schematisch die radiale bzw. axiale Bewegung/Verformung eines Materialvolumens im in Figur 11 gezeigten Bereich.
    The invention will be described below with reference to the drawings of FIGS. 1 to 13B schematically explained in more detail.
    FIG. 1 -
    shows a view through the device according to the invention in a longitudinal section during clamping of the preform,
    FIG. 2 -
    shows the device according to the invention with clamped preform,
    FIG. 3 -
    shows the device according to the invention immediately before forming,
    FIG. 4 -
    shows the device according to the invention with partially processed preform,
    FIG. 5
    shows the device according to the invention at the end of the forming process,
    FIG. 6 -
    shows the preform according to the invention during the removal of the finished workpiece produced from the preform,
    FIG. 7 -
    shows a preform,
    FIG. 8 -
    shows a partially reshaped preform,
    FIG. 9
    shows the workpiece after the forming process,
    FIG. 10 -
    shows a cross section parallel to the machine transverse axis z (left) through a part of the preform and the forming device along a section line BB and a section along the machine longitudinal axis x (right),
    FIG. 11
    shows a cross section parallel to the machine transverse axis z (left) through a part of the preform and the forming device along a section line AA and a section along the machine longitudinal axis x (right),
    FIGS. 12 (A) and (B)
    schematically show the radial or axial movement / deformation of a material volume in FIG. 10 shown area,
    Figures 13
    (A)
    and (B) -
    schematically show the radial or axial movement / deformation of a material volume in FIG. 11 shown area.
  • Die in den Figuren 1 bis 6 dargestellte erfindungsgemäße Vorrichtung weist einen Hauptspindelkasten 1 mit einem Spindelantrieb auf. An der Hauptspindel ist eine Werkzeugeinrichtung 1c angeflanscht, die aus einem stirnverzahnten Mitnehmerelement 1d mit einer Aufnahmebohrung für Futter 1b und Dorn 1a ausgestattet ist.The in the FIGS. 1 to 6 illustrated inventive device has a main spindle box 1 with a spindle drive. On the main spindle, a tool device 1c is flanged, which is equipped of a front-toothed driver element 1d with a receiving bore for chuck 1b and mandrel 1a.
  • Mit der Hauptspindel verbunden ist ein verschiebbarer Dorn 1a, der in Richtung der Maschinen- bzw. Längsachse x (axial) verschieblich gelagert ist. Relativ hierzu wird die Richtung senkrecht zur Zeichenebene und senkrecht zur Maschinenlängsachse x auch als Maschinenquerachse z bezeichnet. Der verschiebbare Dorn 1a wird im Regelfall axial durch einen (nicht dargestellten) Hydraulikzylinder betätigt. Am Ende des Dorns 1a, welches einer an einem Reitstock 2 vorgesehenen Pinole 2a zugewandt ist, befindet sich ein Profil 1a', in dem die Werkzeugspanneinrichtung 2a' der Pinole 2a einrasten kann. Dadurch wird die Vorform 4.1 im Verbund aus Pinole 2a und Dorn 1a axial und radial fixiert und gespannt, so daß eine Einheit entsteht, die axial verschoben und radial um die Maschinenlängsachse x gedreht werden kann.Connected to the main spindle is a displaceable mandrel 1a, which is mounted in the direction of the machine or longitudinal axis x (axially) displaceable. Relative to this, the direction perpendicular to the plane of the drawing and perpendicular to the machine longitudinal axis x is also referred to as machine transverse axis z. The displaceable mandrel 1a is normally actuated axially by a hydraulic cylinder (not shown). At the end of the thorn 1a, which is one on a tailstock 2 provided sleeve 2 a, there is a profile 1 a ', in which the tool clamping device 2 a' of the sleeve 2 a can engage. As a result, the preform 4.1 in the composite of quill 2a and mandrel 1a axially and radially fixed and stretched, so that a unit is formed, which can be axially displaced and rotated radially about the machine axis x.
  • Relativ zur Vorform 4.1 kann sich in dieser Situation das Futter 1b drehen, sofern es durch eine von außen wirkende Kraft beaufschlagt wird, wie es u.a. der Fall ist, wenn das Futter 1b Schrägverzahnungen 1e (vgl. Figuren 10 und 11) aufweist.Relative to the preform 4.1, in this situation, the chuck 1b can rotate, if it is acted on by an externally acting force, as is the case, inter alia, if the chuck 1b has helical teeth 1e (cf. FIGS. 10 and 11 ) having.
  • Das am Außendurchmesser mit einem Negativprofil 1b des zu formenden Innenprofils 4a ausgestattete Futter 1b ist auf dem verschiebbaren Dorn 1a axial fixiert und drehbar angebracht. An der der Vorform 4.1 zugewandten Seite des Futters 1b kann, sofern es erforderlich ist, stirnseitig eine Verzahnung angebracht werden, die dann durch den axialen Druck über den Dorn 1b (etwa durch einen Hydraulikzylinder) gegen die Wandung 4b (vgl. Figuren 7, 8 und 9) der Vorform 4.1 gepresst wird.The chuck 1 b equipped on the outer diameter with a negative profile 1 b of the inner profile 4 a to be formed is axially fixed and rotatably mounted on the displaceable mandrel 1 a. On the side facing the preform 4.1 side of the chuck 1b, if necessary, frontally a toothing are mounted, which then by the axial pressure on the mandrel 1b (for example by a hydraulic cylinder) against the wall 4b (see. FIGS. 7, 8 and 9 ) of the preform 4.1 is pressed.
  • Die Umformeinheit 3 ist axial verfahrbar im Zentrum der Maschinenlängsachse x angeordnet, die von den Wälzkörpern 3a und einem Käfig 3c umlaufen wird. Dabei umlaufen die Wälzkörper 3a, in ihrem Käfig 3c geführt, bei Kontakt mit der Vorform 4.1 diese planetenförmig, d.h., die Wälzkörper 3a umkreisen während des Umformvorganges mit dem Käfig 3c die Vorform 4.1, 4.2, welche sich um die bzw. parallel zur Maschinenlängsachse x dreht.The forming unit 3 is arranged axially movable in the center of the machine longitudinal axis x, which is circulated by the rolling elements 3a and a cage 3c. In this case, the rolling elements 3a, guided in their cage 3c, circulate in contact with the preform 4.1 in the shape of a planet, ie, the rolling elements 3a orbit during the forming process with the cage 3c Preform 4.1, 4.2, which rotates about or parallel to the machine longitudinal axis x.
  • Die Wälzkörper bzw. Umformwalzen 3a sind bevorzugt als Wälzkörper mit kegliger Oberfläche 3a' ausgebildet, deren kleinerer Durchmesser mit einem dem Umformprozeß angepaßten Radius und einer Auslaufschräge 3a" versehen ist. Alle Wälzkörper 3a sind in dem umlaufenden Käfig 3c gehalten. Der Käfig 3c ist zentriert in einem Gehäuse 3b gelagert, welches über eine axiale Stellvorrichtung 3d, in dem gezeigten Beispiel in Form eines Hydraulikzylinders, axial in einer vorgegebenen Position gehalten ist. Mit dieser axialen Positionierung können zu formende Außendurchmesser der Vorform durch die umlaufenden Wälzkörper 3a in einem festgelegten Durchmesserbereich eingestellt werden, so daß verschiedene Durchmesser in einer Vorform 4.1 geformt werden können.The rolling elements or forming rollers 3a are preferably designed as rolling elements with a conical surface 3a ', the smaller diameter of which is provided with a radius adapted to the forming process and an outlet bevel 3a' 'All the rolling elements 3a are held in the revolving cage 3c The cage 3c is centered is mounted in a housing 3b, which is held axially in a predetermined position via an axial adjusting device 3d, in the example shown in the form of a hydraulic cylinder With this axial positioning, outer diameter of the preform to be formed can be set by the revolving rolling bodies 3a in a predetermined diameter range be so that different diameters can be formed in a preform 4.1.
  • Nach erfolgter Umformung wird der Käfig 3c entgegen der Umformrichtung durch die Stellvorrichtung 3d verschoben, so daß die Wälzkörper 3a auf einen größeren Umformdurchmesser eingestellt werden, damit sie, beim Zurückfahren der Umformeinheit 3 in die Ausgangsposition (Figur 1 und Figur 6), das geformte Werkstück 4.2 im Durchmesser nicht beeinträchtigen. Zur Wärmeabfuhr und Schmierung der Umformeinheit 3 sind im Bereich zwischen Gehäuse 3b der Wälzkörper 3a und dem Käfig 3c bevorzugt Kühlmitteleinlässe angeordnet, damit während der Umformung die Umformeinheit 3 mit einem Kühl- und Schmiermittel durchspült werden kann.After reshaping, the cage 3c is displaced counter to the forming direction by the adjusting device 3d, so that the rolling elements 3a are set to a larger forming diameter so that they, when moving back the forming unit 3 in the starting position ( FIG. 1 and FIG. 6 ), do not affect the shaped workpiece 4.2 in diameter. For heat dissipation and lubrication of the forming unit 3, coolant inlets are preferably arranged in the area between the housing 3b of the rolling elements 3a and the cage 3c, so that the forming unit 3 can be flushed with a coolant and lubricant during the forming process.
  • Der Reitstock 2 (in den Figuren 1 bis 6 nur durch einen die Pinole 2a umfassenden Endbereich angedeutet) mit der Pinole 2a und der Werkzeugspanneinrichtung 2a' sind ebenso im Zentrum der Maschinenlängsachse x angeordnet. Der Spannvorgang des Werkstückes läuft dabei wie folgt ab:The tailstock 2 (in the FIGS. 1 to 6 only indicated by an end portion encompassing the quill 2a) with the quill 2a and the tool clamping device 2a 'are also arranged in the center of the machine longitudinal axis x. The clamping process of the workpiece runs as follows:
  • Die Vorform 4.1 wird auf den vorgefahrenen Dorn 1a der Hauptspindelseite aufgeschoben. Die Pinole 2a des Reitstocks 2 fährt in Ladeposition, Figur 1. Dabei wird die Spannzange 2a' durch einen Hydraulikzylinder ausgefahren, so daß das Profil 1a', welches im verschiebbaren Dorn 1a eingearbeitet ist, sich im Bereich der Spannzange 2a' befindet. Mit der weiter vorfahrenden Pinole 2a schließt synchron die Spannzange 2a', so daß die Vorform 4.1 über den Dorn 1a mit dem Futter 1b gegen die Kontaktfläche eines Anpreßringes 2a" der Pinole 2a gedrückt wird. Es bildet sich eine geschlossene Einheit aus Pinole 2a, Dorn 1a, Vorform 4-1 und Futter 1b, Figur 2.The preform 4.1 is pushed onto the advanced mandrel 1a of the main spindle side. The quill 2a of the tailstock 2 moves into loading position, FIG. 1 , In this case, the collet 2a 'is extended by a hydraulic cylinder, so that the profile 1a', which is incorporated in the displaceable mandrel 1a, is located in the region of the collet 2a '. The collet 2a 'closes synchronously with the further advancing sleeve 2a, so that the preform 4.1 is pressed against the contact surface of a contact ring 2a "of the sleeve 2a via the mandrel 1a with the chuck 1b. A closed unit of sleeve 2a, mandrel is formed 1a, preform 4-1 and chuck 1b, FIG. 2 ,
  • Dabei ist die der Hauptspindelseite zugewandte Fläche der Vorform frei, so daß diese Einheit durch die Pinole 2a so lange vorfährt, bis diese Fläche von der stirnverzahnten Mitnehmereinheit 1d, 1c der Hauptspindel axial blockiert und somit durch einen hohen Druck gespannt wird. Dieser Druck muß so groß sein, daß die Vorform 4.1 durch die Mitnehmereinheit 1d, 1c während der Rotation bei der durch die Umformung auf die Vorform 4.1 wirkende Belastung mitgedreht wird.In this case, the main spindle side facing surface of the preform is free, so that this unit by the quill 2a so long vorfährt until this surface of the front toothed driver unit 1d, 1c of the main spindle axially blocked and thus stretched by a high pressure. This pressure must be so great that the preform 4.1 is rotated by the driver unit 1d, 1c during the rotation of the deformation acting on the preform 4.1 by the deformation.
  • Im Einzelnen erfolgt der Ablauf der Verformung wie folgt:Specifically, the process of deformation proceeds as follows:
  • Nachdem die Vorform 4.1 eingespannt ist, fährt die Einheit in Richtung Mitnehmer 1d der Hauptspindel, so daß die Vorform 4.1 bei Kontakt mit dem Mitnehmer 1d gegen diesen gepreßt wird.After the preform 4.1 is clamped, the unit moves in the direction of the driver 1 d of the main spindle, so that the preform 4.1 is pressed in contact with the driver 1 d against this.
  • Nach Einschalten der Hauptspindel drehen sich Mitnehmer 1d und die Einheit aus Pinole 2a, Dorn 1a, Vorform 4.1 und Futter 1b, so daß die Umformeinheit axial bis zum Kontakt der Wälzkörper 3a mit der Vorform 4.1 vorfahren kann, Figur 3. Durch den Kontakt zur Vorform 4.1 stellen sich die Wälzkörper 3a selbstätig in Position und umlaufen in ihrem Kä- fig 3c die Vorform 4.1 planetenförmig. Mit zunehmendem Vorschubdruck wird durch die Wälzkörper 3a der Werkstoff der Vorform 4.1 im Kontaktbereich mit den Wälzkörpern 3a plastifiziert und drängt in die Freiräume zwischen Vorform 4.1, 4.2 und Futter 1b ein, Figur 4, Figur 10 und Figur 11.After switching on the main spindle driver 1d and the unit from quill 2a, mandrel 1a, preform 4.1 and chuck rotate 1b so that the forming unit can advance axially until the contact of the rolling elements 3a with the preform 4.1, FIG. 3 , As a result of the contact with the preform 4.1, the rolling bodies 3a automatically position themselves and rotate in their cage. fig 3c the preform 4.1 planetary. With increasing feed pressure, the material of the preform 4.1 is plasticized in the contact area with the rolling elements 3a by the rolling bodies 3a and pushes into the free spaces between preform 4.1, 4.2 and chuck 1b, FIG. 4 . FIG. 10 and FIG. 11 ,
  • Dabei laufen zeitgleich mehrere Verformungsabläufe ab, welche nun anhand eines fiktiven Werkstoffpartikels erklärt werden.At the same time, several deformation processes take place, which are now explained on the basis of a fictitious material particle.
  • Die angenommene Lage der Partikel ist jeweils in den Schnitten A-A und B-B sowie in zugehörigen Querschnitten der Figuren 12 bzw. 13 gezeigt.The assumed position of the particles is in each case in the sections AA and BB and in associated cross-sections of Figures 12 or 13 shown.
  • Die einzelnen Zustände des Werkstoffpartikels, dessen Volumen im Ausgangszustand wx * wy * wz beträgt, wobei wx, wy, wz die Ausdehnung des Partikels in den drei kartesischen Raumrichtungen angeben, seien dabei wie folgt definiert:
  • 1.0
    angenommener Werkstoffpartikel wx * wz * wy
    1.1
    Verformung des Partikels in der Ebene x,y von wx * wy zu wx1 * wy1 in radialer und tangentialer Richtung bei Drehung des Wälzkörpers 3a um den Winkel Δα
    1.1.2
    Verformung des Partikels in der x,z-Ebene von wx * wz zu wx2 * wz2 in axialer Richtung im Bereich des Wälzkörpers 3a bei Axialvorschub Δz im Be- reich der Schrägung des Wälzkörpers 3a.
    1.1.3
    Verformung des Partikels wx1 *wz2 zu wx3 * wz3 in axialer Richtung im Bereich des Wälzkörpers 3a.
    1.1.4
    Verformung des Partikels wx3 * wz3 zu sx4 *sz4 in axialer Richtung nach Verlassen des Wälzkörperbe- reiches.
    1.1.5
    Verformung des Partikels sx4 *sy4 in radialer und tangentialer Richtung bei Drehung des Wälzkörpers 3a um den Winkel Δα.
    The individual states of the material particle whose volume in the initial state is wx * wy * wz, where wx, wy, wz indicate the extent of the particle in the three Cartesian spatial directions, are defined as follows:
    1.0
    assumed material particles wx * wz * wy
    1.1
    Deformation of the particle in the plane x, y from wx * wy to wx 1 * wy 1 in the radial and tangential direction upon rotation of the rolling element 3a by the angle Δα
    1.1.2
    Deformation of the particle in the x, z plane from wx * wz to wx 2 * wz 2 in the axial direction in the region of the rolling element 3a at axial feed Δz in the region of the taper of the rolling element 3a.
    1.1.3
    Deformation of the particle wx 1 * wz 2 to wx 3 * wz 3 in the axial direction in the area of the rolling element 3a.
    1.1.4
    Deformation of the particle wx 3 * wz 3 to sx 4 * sz 4 in the axial direction after leaving the rolling element area.
    1.1.5
    Deformation of the particle sx 4 * sy 4 in the radial and tangential direction upon rotation of the rolling element 3a by the angle Δα.
  • Bei dieser Umformung geschieht folgendes: Die umlaufenden Wälzkörper 3a plastifizieren im Kontaktbereich mit der Vorform 4.1 den Werkstoff in tangentialer, radialer und axialer Richtung bei gleichzeitigem axialem Vorschub in Richtung Mitnehmer 1d der Hauptspindel.In the case of this deformation, the following occurs: The revolving rolling elements 3a plasticize the material in tangential, radial and axial direction in the contact region with the preform 4.1 with simultaneous axial feed in the direction of the driver 1d of the main spindle.
  • Der Kontaktbereich der Wälzkörper 3a mit der Vorform 4.1 bildet eine Umformzone U, vgl. Figuren 12 und 13. In dieser Umformzone U dringt der plastifizierte Werkstoff in den Freiraum zwischen Vorform 4.1 und Futter 1b ein, füllt das Profil 1e im Futter 1b aus, Figur 10. Der Werkstoff stützt sich dabei am axial blockierten Bereich der Vorform 4.2 zwischen Umformzone U und Mitnehmer 1d ab. Dadurch verschiebt der überflüssige Werkstoff axial die freibewegliche, gekoppelte Einheit, die aus Dorn 1a, Futter 1b, Spanneinrichtung 2a', Pinole 2a und dem Bereich der Vorform 4.2, der außerhalb und hinter der Umformzone U liegt.The contact region of the rolling elements 3a with the preform 4.1 forms a forming zone U, see. FIGS. 12 and 13 , In this forming zone U, the plasticized material penetrates into the free space between preform 4.1 and chuck 1b, filling the profile 1e in the chuck 1b, FIG. 10 , The material is supported on the axially blocked area of the preform 4.2 between forming zone U and driver 1d. As a result, the superfluous material axially displaces the freely movable, coupled unit consisting of mandrel 1a, chuck 1b, clamping device 2a ', quill 2a and the region of the preform 4.2, which lies outside and behind the forming zone U.
  • Die sich dabei bildende, axiale Länge Δs mit dem neugeformten Außendurchmesser bewegt sich in Richtung Reitstock 2. Sie ergibt sich aus dem Restvolumen mit dem neugeformten Querschnitt, welches vom verdrängten Volumen, abzüglich des in den Freiraum eingedrungenen Volumens übrig geblieben ist.The resulting axial length .DELTA.s with the newly formed outer diameter moves in the direction of the tailstock 2. It results from the residual volume with the newly formed cross section, which has remained from the displaced volume, minus the volume which has penetrated into the free space.
  • Im Bereich der Umformzone U verdrängen die Wälzkörper 3a den Werkstoff in radialer und tangentialer Richtung. Es kommt daher innerhalb der Vorform 4.2 im Bereich der Umformzone U zu einer Verdrehung des Werkstoffes gegenüber dem durch die Mitnehmer 1d gehaltenen Teil der Vorform 4.2 außerhalb der Umformzone U, weil durch die radiale Reduzierung des Außendurchmessers während der Umformung die Werkstoffmenge auf einem kleineren Außendurchmesser untergebracht werden muß. Daraus resultiert eine überlagerte Relativdrehung des Werkstoffes zur eigentlichen Drehung der Vorform 4.2. Dabei ist die Größe des Verdrehwinkels der Relativdrehung abhängig von der Reduktion des Werkstückquerschnittes. Es muss sich somit der Bereich der Vorform 4.2 verdrehen, der zwischen der Pinole 2a und der Umformzone U in Vorform liegt.In the region of the forming zone U, the rolling elements 3a displace the material in the radial and tangential direction. It comes therefore within the preform 4.2 in the region of the forming zone U to a rotation of the material relative to the part held by the driver 1d part of the preform 4.2 outside the forming zone U, because accommodated by the radial reduction of the outer diameter during forming the amount of material on a smaller outer diameter must become. This results in a superimposed relative rotation of the material for the actual rotation of the preform 4.2. The size of the angle of rotation of the relative rotation is dependent on the reduction of the workpiece cross-section. Thus, the area of the preform 4.2, which lies in preform between the quill 2a and the forming zone U, must rotate.
  • Ist der Dorn 1a, auf dem die Vorform 4.2 abgestreckt wird, drehfest mit dem Mitnehmer 1d der Hauptspindel verbunden, muß sich der Werkstoff relativ in tangentialer Richtung auf den sich drehenden Dorn 1a verdrehen. Befindet sich auf dem Dorn 1a eine radiale Profilierung (wie z.B. die Profilierung 1c auf dem Futter 1b), so kommt es zu ansteigenden Verdrehspannungen innerhalb des Profils 1c bis zu dessen Bruch. Durch das auf dem Dorn 1a drehbar gelagerte Futter 1b werden die Verdrehspannungen durch Mitdrehen des Futters 1b kompensiert.If the mandrel 1a, on which the preform 4.2 is stretched, rotatably connected to the driver 1d of the main spindle, the material must rotate relative to the rotating mandrel 1a in the tangential direction. If a radial profiling (such as the profiling 1c on the chuck 1b) is present on the mandrel 1a, then increasing torsional stresses occur within the profile 1c until it breaks. By the rotatably mounted on the mandrel 1a chuck 1b the torsional stresses are compensated by turning the chuck 1b.
  • Nachdem die Umformeinheit die Vorform 4.1, 4.2 zu einem Werkstück 4.3 umgeformt hat, Figur 5, wird der Käfig 3c axial in eine Position verschoben, in der die Wälzkörper 3a radial ausweichen können. Mit dieser Einstellung kann die Umformeinheit zurückfahren. Sobald die Hauptspindel stoppt, wird die verschiebbare Einheit aus Pinole 2a, Dorn 1a, Vorform 4.1 und Futter 1b entkoppelt, und die Reitstockpinole 2a mit geöffneter Spanneinheit 2a' zurückgefahren, Figur 6. Das geformte Werkstück, welches sich auf dem Futter 1d befindet, wird durch den Mitnehmer 1d, in dem der zurückfahrende Dorn 1a mit dem Futter 1b eintaucht, vom Futter 1b abgestreift.After the forming unit has converted the preform 4.1, 4.2 into a workpiece 4.3, FIG. 5 , the cage 3c is axially displaced to a position in which the rolling elements 3a can deflect radially. With this setting, the forming unit can go back. As soon as the main spindle stops, the displaceable unit of quill 2a, mandrel 1a, preform 4.1 and chuck 1b is decoupled, and the tailstock quill 2a is retracted with the clamping unit 2a 'open, FIG. 6 , The molded workpiece, which is located on the chuck 1d, is stripped from the chuck 1b by the dog 1d in which the returning mandrel 1a is dipped with the chuck 1b.

Claims (19)

  1. Device for generating or processing workpieces from a preform (4.1), having a mandrel (1a) which is mounted so that it can be rotated about a longitudinal axis (x) of the device and displaced parallel to the longitudinal axis (x) and a chuck (1b) for tensioning the preform (4.1) and a sleeve (2a) which can be coupled to the mandrel (1a) and is mounted displaceably along the longitudinal direction (x) and a shaping unit (3) for shaping the preform (4.1), wherein the preform (4.1) can be axially and radially fixed and tensioned in a composite unit comprising the sleeve (2a) and the mandrel (1a) so that a closed unit comprising sleeve (2a), preform (4.1), mandrel (1a) and chuck (1b) is formed, wherein the device comprises an entrainer element (1d), wherein the unit can be moved in the direction of the entrainer element (1d) so that the preform (4.1) is pressed upon contact with the entrainer element against the entrainer element (1d),
    characterised in that
    the mandrel (1a) is connected rotationally securely to the entrainer element (1d) and the chuck (1b) is rotationally mounted on the mandrel (1a).
  2. Device according to claim 1,
    characterised in that
    the chuck (1b) has a negative form (1e) which corresponds to a positive form (4a) to be formed on the preform (4.1).
  3. Device according to one of the preceding claims,
    characterised in that
    the mandrel (1a) is assigned to a headstock (1) and which is freely movable axially and tangentially in a tool housing (1c).
  4. Device according to claim 3,
    characterised in that
    the headstock (1) comprises a drive for rotation and / or axial displacement of the preform (4.1) via the tool housing (1c) and the entrainer element (1d) arranged thereon facing the sleeve (2a).
  5. Device according to one of the preceding claims,
    characterised in that
    the sleeve (2a) is assigned to a tailstock (2) and comprises a pressing ring (2a ").
  6. Device according to claim 5,
    characterised in that
    the sleeve (2a) of the tailstock (2) is mounted so as to be rotationally and / or axially displaceable.
  7. Device according to one of the preceding claims,
    characterised in that
    the shaping unit (3) comprises at least two rolling bodies (3a).
  8. Device according to claim 7,
    characterised in that
    the shaping unit (3) is arranged to be axially displaceable.
  9. Device according to one of the claims 7 or 8,
    characterised in that
    the setting angle of the rolling body (3a) can be varied.
  10. Device according to one of the claims 7 to 9,
    characterised in that
    the rolling bodies (3a) are arranged and mounted so that they can be driven to circulate over the preform (4.1).
  11. Method for generating or processing workpieces from a preform (4.1) by means of a device according to one of the preceding claims, wherein a preform (4.1) located on a chuck (1b) axially fixed and rotationally arranged on a mandrel (1a) is shaped by means of a shaping unit (3), wherein the shaping of the preform (4.1) is brought about by means of a material flow arising via a pressure between the shaping unit (3) and preform (4.1), wherein the chuck (1b) follows, during the shaping, the movement direction of the flowing material, wherein the material flow obtains a tangential component,
    characterised in that
    through the chuck (1b) mounted rotationally on the mandrel (1a) the rotation stresses are compensated by entraining the chuck, whereby the chuck (1b) moves in the direction of the forces exerted.
  12. Method according to claim 11,
    characterised in that
    the chuck (1b) follows, during the shaping, the axial and tangential movement directions of the flowing material.
  13. Method according to claim 11 or 12,
    characterised in that
    before the shaping the preform (4.1) is initially received by an axially moving mandrel (1a) by means of an advancing movement (1e), the preform (4.1) is then pressed through an axially advancing sleeve (1a) against a tool housing (3c) so that a coupled unit comprising chuck (1b), mandrel (1a), preform (4.1) and sleeve (2a) is produced.
  14. Method according to claim 13,
    characterised in that
    the coupled unit follows the axial and tangential movement directions of the flowing material during shaping.
  15. Method according to one of the preceding claims, characterised in that
    the chuck (1b) is drawn via the mandrel (1a) through the clamping device (2a') against the inner side of the preform (4.1) so that the chuck (1b) comes into direct contact with the region of the preform (4.1) not to be shaped.
  16. Method according to one of the claims 13 to 15,
    characterised in that
    the coupled unit is set in rotation.
  17. Method according to one of the claims 11 to 16,
    characterised in that
    the preform (4.1), before shaping, is tensioned to be radially and axially non-displaceable in relation to the chuck (1b) mounted rotationally on a mandrel (1a).
  18. Method according to one of the claims 11 to 17,
    characterised in that
    the shaping unit (3) comprises rollers (3a) which are placed on the preform (4.1) to be processed.
  19. Method according to one of the claims 11 to 18,
    characterised in that
    the shaping unit (3) is moved upon pressure of the rollers against the preform (4.1) relative thereto in the longitudinal direction (x) thereof.
EP20080013579 2008-05-26 2008-07-29 Device and method for generating or processing workpieces from a blank mould, in particular for casting internal profiles or internal gears Active EP2127777B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20080009558 EP2127775B1 (en) 2008-05-26 2008-05-26 Method for manufacturing workpieces and spinning machine therefor
EP20080013579 EP2127777B1 (en) 2008-05-26 2008-07-29 Device and method for generating or processing workpieces from a blank mould, in particular for casting internal profiles or internal gears

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP20080013579 EP2127777B1 (en) 2008-05-26 2008-07-29 Device and method for generating or processing workpieces from a blank mould, in particular for casting internal profiles or internal gears
CN2009801289961A CN102105240A (en) 2008-07-29 2009-07-29 Device and process for producing or processing workpieces from a preform, in particular for integrally forming internal profiles or internal tooth systems
PCT/EP2009/005491 WO2010012457A1 (en) 2008-07-29 2009-07-29 Device and process for producing or processing workpieces from a preform, in particular for integrally forming internal profiles or internal tooth systems
US13/056,358 US8984921B2 (en) 2008-05-26 2009-07-29 Device and process for producing or processing workpieces from a preform, in particular for integrally forming internal profiles or internal tooth systems

Publications (2)

Publication Number Publication Date
EP2127777A1 EP2127777A1 (en) 2009-12-02
EP2127777B1 true EP2127777B1 (en) 2012-04-18

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EP20080009558 Active EP2127775B1 (en) 2008-05-26 2008-05-26 Method for manufacturing workpieces and spinning machine therefor
EP20080013579 Active EP2127777B1 (en) 2008-05-26 2008-07-29 Device and method for generating or processing workpieces from a blank mould, in particular for casting internal profiles or internal gears

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EP (2) EP2127775B1 (en)
JP (1) JP5527875B2 (en)
KR (1) KR101540814B1 (en)
CN (1) CN101590510A (en)
AT (2) AT458564T (en)
DE (1) DE502008000404D1 (en)
ES (2) ES2341683T3 (en)

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US8230597B2 (en) * 2008-10-03 2012-07-31 Ford Global Technologies, Llc Forming preforms and parts therefrom
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ES2543005T3 (en) * 2010-01-12 2015-08-13 Repkon Machine and Tool Industry and Trade Inc. Device and procedure for molding work pieces
CN102500699A (en) * 2011-12-21 2012-06-20 厦门捷讯汽车零部件有限公司 Manufacturing mould for non-spoke automobile decoupling motor pulley and process thereof
EP2716377B1 (en) 2012-10-05 2016-03-02 Zaklad Produkcji Sprzetu Oswietleniowego "ROSA"-Stanislaw ROSA A method of manufacturing a conical tube element
PL224268B1 (en) 2013-06-12 2016-12-30 Lubelska Polt Method for the rotatry pushing with adjustable wheel base of graded axisymmetric forgings
EP3025802A1 (en) 2014-11-28 2016-06-01 Repkon Machine and Tool Industry and Trade Inc. Device and method for pressure rolling workpieces
CN104858284B (en) * 2015-05-15 2017-05-17 航天特种材料及工艺技术研究所 Forward-spinning spinning method
CN104858286B (en) * 2015-05-15 2017-03-08 航天特种材料及工艺技术研究所 A kind of spinning machine
CN104959440B (en) * 2015-05-15 2017-03-29 航天特种材料及工艺技术研究所 A kind of derotation spin-on process
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US8161788B2 (en) 2012-04-24
US20090288464A1 (en) 2009-11-26
KR101540814B1 (en) 2015-07-30
ES2386504T3 (en) 2012-08-22
US20110126606A1 (en) 2011-06-02
EP2127777A1 (en) 2009-12-02
KR20090122889A (en) 2009-12-01
EP2127775B1 (en) 2010-02-24
JP2009285730A (en) 2009-12-10
DE502008000404D1 (en) 2010-04-08
AT458564T (en) 2010-03-15
CN101590510A (en) 2009-12-02
JP5527875B2 (en) 2014-06-25
ES2341683T3 (en) 2010-06-24
EP2127775A1 (en) 2009-12-02
AT553864T (en) 2012-05-15
US8984921B2 (en) 2015-03-24

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