EP1568441A1 - Device for the production of toothed belt forms - Google Patents

Device for the production of toothed belt forms Download PDF

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Publication number
EP1568441A1
EP1568441A1 EP05007364A EP05007364A EP1568441A1 EP 1568441 A1 EP1568441 A1 EP 1568441A1 EP 05007364 A EP05007364 A EP 05007364A EP 05007364 A EP05007364 A EP 05007364A EP 1568441 A1 EP1568441 A1 EP 1568441A1
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Prior art keywords
profile
dressing
grinding wheel
grinding
workpiece
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German (de)
French (fr)
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EP1568441B1 (en
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Peter Bäumler
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
    • B24B5/045—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally with the grinding wheel axis perpendicular to the workpiece axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/04—Devices or means for dressing or conditioning abrasive surfaces of cylindrical or conical surfaces on abrasive tools or wheels
    • B24B53/047—Devices or means for dressing or conditioning abrasive surfaces of cylindrical or conical surfaces on abrasive tools or wheels equipped with one or more diamonds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
    • B24B53/07—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels by means of forming tools having a shape complementary to that to be produced, e.g. blocks, profile rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
    • B24B53/08—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels controlled by information means, e.g. patterns, templets, punched tapes or the like
    • B24B53/085—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels controlled by information means, e.g. patterns, templets, punched tapes or the like for workpieces having a grooved profile, e.g. gears, splined shafts, threads, worms

Definitions

  • Timing belt forms are usually steel tube rolls, which are straight on their circumference toothed and used as the inner core in the manufacture of timing belts, e.g. out Perbunan gum or plastic, needed.
  • the heated toothed belt material is pressed into the toothing of the toothed belt shape.
  • the toothing of the timing belt shapes thus forms the die of the toothed belt toothing.
  • timing belt shapes It is known to produce timing belt shapes by milling from cylindrical blanks. The requirements for the accuracy of tooth geometries of timing belts is increased enormously. Thus, the tooth surface should be as smooth as possible, i. if possible have no illustrations of existing in the timing belt shapes Fräsriefen. When milling timing belt shapes, it is therefore usually necessary to the surface retread the timing belt shape.
  • the dressing means at least one profile dressing with a profiled dressing area, wherein the profile of the dressing area the Counter profile of at least part of the desired peripheral profile of at least a grinding wheel and the treading element is a dressing hard body, for example, diamond, with an edge-like dressing area.
  • the device according to the invention allows a method for the production of Timing belt forms, in which by means of at least one rotating grinding wheel with a profiled circumference in the before-processing substantially cylindrical Circumference of a workpiece is a die of the desired toothed belt toothing is incorporated, wherein the circumferential profile of the profile of a complete tooth groove of desired timing belt shape corresponds.
  • the die for the timing belt is not milled but by grinding with specially profiled grinding wheels with a grinding movement parallel to the Longitudinal axis of the workpiece generated.
  • This can be a quality of Surface of the finished workpiece can be achieved, the aftertreatment unnecessary.
  • As a tooth groove the entire area from the head of a tooth becomes the head of the adjacent tooth understood. The grinding of two adjacent tooth grooves thus results in a complete tooth of the timing belt shape being generated, i. H. Also, the outer diameter of the timing belt shape is ground.
  • the toothed groove of the timing belt shape must be the shrinkage of the toothed belt material during cooling in the manufacturing process.
  • profiled grinding wheels also allows the finest in a simple way
  • z. B. a wavy sub-profile in Range of tooth flanks.
  • for. B. parallel to the toothed belt forming axis running channels are introduced into the profile.
  • Timing belt with such Subprofiles are disclosed in DE 199 08 672 C1.
  • the dressing is required due to the gradual wear of the grinding wheel.
  • the use of a profile dressing element with profiled dressing area has the advantage that a complex CNC control for the movement of other dressing means, such as Example of a dressing pin, not required because the profiled dressing area a fixed profile pretends.
  • a profile dressing element is therefore particularly useful if variations of the profile shape are not needed and high volumes with identical Vernierungsgeometrien are to produce.
  • the device according to the invention can also be designed so that the positioned at least one profile dressing relative to the workpiece holder and is adjustable that in the direction of the longitudinal center axis of the at least one clamped Tool looks at the projection of the profile of the dressing area a tool face the profile of the cross section of a grinding process aspired cut corresponds.
  • the rotating grinding wheel it is possible for the rotating grinding wheel to be single straight-line translational movement first to lead along the profile hard body and to achieve the desired Abraum of the peripheral profile of the grinding wheel and then perform the grinding process on the workpiece.
  • a Adjustment of the grinding wheel towards the longitudinal central axis of the workpiece radial direction is therefore no longer required for the grinding process.
  • the relative movement between grinding wheel and workpiece can be achieved by a movement the grinding wheel with respect to a machine frame or a movement of a Tool holder can be achieved.
  • Fig. 1 shows a grinding device with a machine frame 1, on which a horizontal movable grinding table 2 is attached.
  • the grinding table 2 carries a workpiece holder 3, in which the roller-shaped blank 4 for a toothed belt form between a Dividing unit 16 and an abutment 17 is clamped.
  • a rotary driver 5 the blank 4 can be controlled by means of a turntable 6 about a horizontal axis of rotation 7 to be turned around.
  • the axis of rotation 7 forms in the blank 4 at the same time the longitudinal central axis of the blank 4.
  • the workpiece holder 3 does not include a separate here presented high-precision direct measuring system, the exact rotational angle adjustment allowed.
  • Above the workpiece holder 3 is on a grinding wheel holder.
  • the grinding wheel holder 8 a grinding wheel 9 rotatably fixed.
  • the grinding wheel holder 8 is highly precise in vertical direction controlled movable.
  • To form a toothed belt shape from the blank 4 To obtain in the scope of the blank 4, the counter profile of Toothed belt teeth are incorporated, the toothing in the direction of Longitudinal axis of the blank 4 is rectilinear and constant.
  • the scope now forms viewed in cross-section, the die for the toothed belt toothing.
  • the grinding wheel 9 has on its circumference a profile 10, which in an enlarged Representation in Fig. 2 is visible.
  • the circumferential profile 10 of the grinding wheel 9 corresponds the desired profile of a Zahnnut the timing belt shape.
  • Timing belt shape is the blank 4 by means of the grinding table 2 at lowered Grinding wheel 9 so moved that the grinding wheel 9 over the entire length of the Blanks 4 in the blank 4, the die for a complete tooth of Timing belt cuts in. After that, the blank 4 is at a predetermined angle ⁇ turned and the next tooth matrix generated. At every grinding process will also the outside diameter of the blank 4 mitgeschliffen, so that in a finished Timing belt shape the entire surface is ground.
  • the circumferential profile 10 can the grinding wheel 9 with a dressing pin 11 before each grinding re-dressed become. This is done with the help of a CNC-controlled process.
  • the dressing pin 11 is for one with respect to the axis of rotation of the grinding wheel axialer as well as in radial Direction movable.
  • the dressing pin 11 still has a dressing pivot axis 12 substantially perpendicular to the axial and radial directions and through the Center of a round diamond 13 at the top of Abrichtstartes 11 runs. With equipped with such degrees of freedom, can with the dressing pen 11 almost every Any profile can be entered in the circumference of the grinding wheel 9. Especially it is possible to incorporate fine substructures in the circumferential profile 10.
  • the grinding wheel is constantly using a spray nozzle pair 14 (Fig.1) cleaned, the two flanks of the peripheral profile 10 sufficient reached evenly.
  • the Nozzle pair 15 is arranged in the immediate vicinity of the grinding papers 9.
  • Fig. 4 shows an alternative construction of a grinding device. Corresponding one another Parts in different figures are provided with the same reference numbers. Of the Blank 4a is shorter in Fig. 4 than in Fig. 1. The tool holder 3 has in its dividers 16 and 17 the same distance as in Fig. 1. However, it is one with struts Provided 20 provided length adapter 18. With the help of one or more length adapters 18 can also be at different lengths of blanks 4a an adjustment the dividing devices avoid 16 and 17 of the workpiece holder 3 to a once consuming obtained high accuracy in the distance.
  • a profile diamond 19 is arranged, for dressing the Grinding wheel 9 serves and is shown enlarged in Figure 5.
  • the profile diamond 19 has a dressing edge 21, the profile of the profile of the desired Zahnnut the Timing belt shape corresponds.
  • the grinding table 2 in a Starting position brought at which the grinding wheel 9 in Fig. 4 left of the profile diamond 19 is positioned.
  • the grinding wheel holder 8 is then lowered so far that in a process of the grinding table 2 to the left (in Fig. 4), the outer circumference the rotating grinding wheel 9 from the dressing edge 21 of the profile diamond 9 with the corresponding counter-profile is provided.
  • the outer circumference of the Grinding wheel 9 the profile of a complete tooth groove of the desired Toothed shape.
  • the profile diamond 19 is oriented such that by a further method of the Grinding table 2 the grinding wheel 9 without vertical position change in correct Working position reaches the workpiece 4a and in a single grinding process the Matrix for a complete tooth of the toothed belt including tooth root manufactures. hereafter the grinding wheel holder 8 is raised and the grinding table 2 back in move the starting position. The grinding wheel holder 8 is lowered again, However, because of the given during grinding wear by a small distance further than before the previous round. In this way, the scope of the Grinding wheel 9 re-dressed before each grinding.
  • the profile diamond 19 is mounted variable in position in the vertical direction, so that any wear can be compensated or an adjustment to different workpiece diameter is possible.

Abstract

A cylindrical die is machined in a workpiece(4) using a rotating grinding disc(9) with a periphery corresponding to the profile of a complete tooth of the belt or the opposing tooth profile of a complete gap in a gear wheel. The die is then used for molding toothed belts or forming gear wheels. An independent claim is made for the process equipment which includes a workpiece holder(3) for rotating a cylindrical workpiece(4) and a grinding tool(9) moving relative to workpiece holder. A dressing tool for the outer profile of the grinding disc ensures the profile always corresponds to a complete tooth of the belt or the opposing profile of a complete tooth gap of a gear wheel.

Description

Die Erfindung betrifft eine Vorrichtung zur Herstellung von Zahnriemenformen, umfassend

  • a) eine Werkstückhalterung,
  • b) Drehmittel, mit denen mindestens ein in der Werkstückhalterung eingespanntes, im Wesentlichen zylindrisches Werkstück um vorgegebene Winkel um seine Längsmittelachse kontrolliert drehbar ist, und
  • c) ein relativ zur Werkstückhalterung verfahrbares spangebendes Werkzeug, wobei
  • d) das mindestens eine Werkzeug eine Schleifscheibe ist, und
  • e) Abrichtmittel zum Abrichten eines bestimmten Umfangprofils der mindestens einen Schleifscheibe vorgesehen sind, wobei das Umfangsprofil der Schleifscheibe derart abrichtbar ist, dass es dem Profil einer vollständigen Zahnnut der gewünschten Zahnriemenform entspricht.
    • The invention relates to a device for producing toothed belt molds, comprising
  • a) a workpiece holder,
  • b) rotating means with which at least one clamped in the workpiece holder, substantially cylindrical workpiece controlled by predetermined angle about its longitudinal central axis is rotatable, and
  • c) a movable relative to the workpiece holder cutting tool, wherein
  • d) the at least one tool is a grinding wheel, and
  • e) dressing means for dressing a certain circumferential profile of the at least one grinding wheel are provided, wherein the peripheral profile of the grinding wheel can be dressed so that it corresponds to the profile of a complete tooth groove of the desired timing belt shape.

    • Zahnriemenformen sind in der Regel Stahlrohrwalzen, die auf ihrem Mantelumfang geradlinig verzahnt sind und als Innenkern bei der Herstellung von Zahnriemen, z.B. aus Perbunangummi oder Kunststoff, benötigt werden. Das erhitzte Zahnriemenmaterial wird in die Verzahnung der Zahnriemenform gedrückt. Die Verzahnung der Zahnriemenformen bildet somit die Matrize der Zahnriemenverzahnung.Timing belt forms are usually steel tube rolls, which are straight on their circumference toothed and used as the inner core in the manufacture of timing belts, e.g. out Perbunan gum or plastic, needed. The heated toothed belt material is pressed into the toothing of the toothed belt shape. The toothing of the timing belt shapes thus forms the die of the toothed belt toothing.

    Es ist bekannt, Zahnriemenformen durch Fräsen aus zylinderförmigen Rohlingen herzustellen. Die Anforderungen an die Exaktheit der Zahngeometrien von Zahnriemen ist enorm gestiegen. So soll die Zahnoberfläche möglichst glatt sein, d.h. nach Möglichkeit keine Abbildungen von in den Zahnriemenformen vorhandenen Fräsriefen aufweisen. Beim Fräsen von Zahnriemenformen ist es daher in der Regel erforderlich, die Oberfläche der Zahnriemenform nachzubehandeln.It is known to produce timing belt shapes by milling from cylindrical blanks. The requirements for the accuracy of tooth geometries of timing belts is increased enormously. Thus, the tooth surface should be as smooth as possible, i. if possible have no illustrations of existing in the timing belt shapes Fräsriefen. When milling timing belt shapes, it is therefore usually necessary to the surface retread the timing belt shape.

    Zudem hat die Vielfalt an Zahngeometrien zugenommen, die den Ansprüchen an hoher Leistungsfähigkeit und Laufruhe genügen sollen. In addition, the variety of tooth geometries has increased, the demands on high Performance and smoothness should be sufficient.

    Es ist bekannt (König, W. u. Meijboom, H. M.; Abrichten von Profilschleifscheiben für das Zahnflankenschleifen; VDI - Z 121, 1979, Nr. 21, Seiten 1087 bis 1092) eine Vorrichtung mit den technischen Merkmalen der eingangs genannten Vorrichtung für das Formschleifen von Zahnrädern einzusetzen. Dabei werden die Schleifscheiben entlang diamantbesetzter Flächen geführt, zum Beispiel entlang einem diamantbesetzten Abrichtband. Derart flächige Abrichtelemente haben den Nachteil, dass sie es unmöglich machen, gezielt feinste Strukturen in das Umfangsprofil der Schleifscheibe einzuarbeiten. Aus der DE 1 577 534 A ist eine Abrichteinrichtung für profilierte Schleifscheiben bekannt, bei der als Abrichtwerkzeug ein Diamanthalter mit einem einzelnen Diamanten, eine drehbare Diamantscheibe oder Profilrollen offenbart sind.It is known (König, W. and Meijboom, HM, dressing of profile grinding wheels for tooth flank grinding, VDI - Z 121, 1979, No. 21, pages 1087 to 1092) a device with the technical features of the above-mentioned apparatus for the forming grinding of gears. The grinding wheels are guided along diamond-studded surfaces, for example along a diamond-coated dressing belt. Such flat dressing elements have the disadvantage that they make it impossible to incorporate targeted finest structures in the circumferential profile of the grinding wheel. From DE 1 577 534 A a dressing device for profiled grinding wheels is known in which a diamond holder with a single diamond, a rotatable diamond disk or profile rollers are disclosed as the dressing tool.

    Es ist nun Aufgabe der vorliegenden Erfindung eine Vorrichtung der eingangs genannten Art bereitzustellen, mit der neben einer hohen geometrischen Präzision eine hohe Oberflächenqualität der Zahnriemenform ermöglicht wird.It is an object of the present invention, a device of the initially to provide type mentioned, with the addition of a high geometric precision a high surface quality of the timing belt shape is made possible.

    Die vorgenannte Aufgabe wird bei einer Vorrichtung der eingangs genannten Art dadurch gelöst, dass die Abrichtmittel mindestens ein Profilabrichtelement mit einem profilierten Abrichterbereich umfassen, wobei das Profil des Abrichterbereichs das Gegenprofil von zumindest einem Teil des gewünschten Umfangprofils der mindestens einen Schleifscheibe ist und das Profilabrichtelement ein Abrichthartkörper, beispielsweise aus Diamant, mit einem kantenartigen Abrichterbereich ist.The aforementioned object is in a device of the type mentioned achieved in that the dressing means at least one profile dressing with a profiled dressing area, wherein the profile of the dressing area the Counter profile of at least part of the desired peripheral profile of at least a grinding wheel and the treading element is a dressing hard body, for example, diamond, with an edge-like dressing area.

    Die erfindungsgemäße Vorrichtung erlaubt ein Verfahren zur Herstellung von Zahnriemenformen, bei dem mittels mindestens einer rotierenden Schleifscheibe mit einem profilierten Umfang in den vor der Bearbeitung im Wesentlichen zylinderförmigen Umfang eines Werkstücks eine Matrize der gewünschten Zahnriemenverzahnung eingearbeitet wird, wobei das Umfangsprofil dem Profil einer vollständigen Zahnnut der gewünschten Zahnriemenform entspricht.The device according to the invention allows a method for the production of Timing belt forms, in which by means of at least one rotating grinding wheel with a profiled circumference in the before-processing substantially cylindrical Circumference of a workpiece is a die of the desired toothed belt toothing is incorporated, wherein the circumferential profile of the profile of a complete tooth groove of desired timing belt shape corresponds.

    Somit wird die Matrize für die Zahnriemen nicht gefräst sondern durch Schleifen mit speziell profilierten Schleifscheiben mit einer Schleifbewegung parallel zur Längsmittelachse des Werkstückes erzeugt. Hierdurch kann eine Qualität der Oberfläche des fertigen Werkstückes erreicht werden, die eine Nachbehandlung erübrigt. Als Zahnnut wird der vollständige Bereich vom Kopf eines Zahnes zum Kopf des benachbarten Zahnes verstanden. Das Schleifen zweier benachbarter Zahnnuten führt somit dazu, dass ein vollständiger Zahn der Zahnriemenform erzeugt wird, d. h. auch der Außendurchmesser der Zahnriemenform wird geschliffen. Für die Geometrie der Zahnnut der Zahnriemenform muss die Schrumpfung des Zahnriemenmaterials während der Erkaltung beim Herstellungsprozess berücksichtigt werden.Thus, the die for the timing belt is not milled but by grinding with specially profiled grinding wheels with a grinding movement parallel to the Longitudinal axis of the workpiece generated. This can be a quality of Surface of the finished workpiece can be achieved, the aftertreatment unnecessary. As a tooth groove, the entire area from the head of a tooth becomes the head of the adjacent tooth understood. The grinding of two adjacent tooth grooves thus results in a complete tooth of the timing belt shape being generated, i. H. Also, the outer diameter of the timing belt shape is ground. For the geometry The toothed groove of the timing belt shape must be the shrinkage of the toothed belt material during cooling in the manufacturing process.

    Die Verwendung profilierter Schleifscheiben erlaubt zudem, auf einfache Weise feinste Unterstrukturen im Zahnprofil zu erzeugen, z. B. ein wellenförmiges Unterprofil im Bereich der Zahnflanken. Hierfür können z. B. parallel zur Zahnriemenformachse verlaufende Kanäle in das Profil eingebracht werden. Zahnriemen mit derartigen Unterprofilen sind in der DE 199 08 672 C1 offenbart.The use of profiled grinding wheels also allows the finest in a simple way To create substructures in the tooth profile, z. B. a wavy sub-profile in Range of tooth flanks. For this purpose, for. B. parallel to the toothed belt forming axis running channels are introduced into the profile. Timing belt with such Subprofiles are disclosed in DE 199 08 672 C1.

    Das Abrichten ist aufgrund der allmählichen Abnutzung der Schleifscheibe erforderlich. Der Einsatz eines Profilabrichtelements mit profiliertem Abrichterbereich hat den Vorteil, dass eine aufwendige CNC-Steuerung für die Bewegung anderer Abrichtmittel, wie zum Beispiel eines Abrichtstiftes, nicht erforderlich ist, da der profilierte Abrichterbereich ein festes Profil vorgibt. Ein Profilabrichtelement ist daher insbesondere dann sinnvoll, wenn Variationen der Profilform nicht benötigt werden und hohe Stückzahlen mit identischen Verzahnungsgeometrien herzustellen sind.The dressing is required due to the gradual wear of the grinding wheel. The use of a profile dressing element with profiled dressing area has the advantage that a complex CNC control for the movement of other dressing means, such as Example of a dressing pin, not required because the profiled dressing area a fixed profile pretends. A profile dressing element is therefore particularly useful if variations of the profile shape are not needed and high volumes with identical Verzahnungsgeometrien are to produce.

    Schließlich kann die erfindungsgemäße Vorrichtung auch so ausgebildet sein, dass das mindestens eine Profilabrichtelement relativ zum Werkstückhalter derart positioniert und justierbar ist, dass in Richtung der Längsmittelachse des mindestens einen eingespannten Werkzeugs betrachtet die Projektion des Profils des Abrichterbereichs auf einer Werkzeugstirnseite dem Profil des Querschnitts des bei einem Schleifvorgang erstrebten Schnittes entspricht.Finally, the device according to the invention can also be designed so that the positioned at least one profile dressing relative to the workpiece holder and is adjustable that in the direction of the longitudinal center axis of the at least one clamped Tool looks at the projection of the profile of the dressing area a tool face the profile of the cross section of a grinding process aspired cut corresponds.

    Bei einer solchen Anordnung ist es möglich, die rotierende Schleifscheibe mit einer einzigen geradlinigen Translationsbewegung zunächst am Profilhartkörper entlang zu führen und dabei die gewünschte Abrichtung des Umfangprofils der Schleifscheibe zu erreichen und anschließend den Schleifvorgang am Werkstück durchzuführen. Eine Justage der Schleifscheibe hin zur Längsmittelachse des Werkstückes radialer Richtung ist somit für den Schleifvorgang nicht mehr erforderlich.With such an arrangement, it is possible for the rotating grinding wheel to be single straight-line translational movement first to lead along the profile hard body and to achieve the desired Abrichtung of the peripheral profile of the grinding wheel and then perform the grinding process on the workpiece. A Adjustment of the grinding wheel towards the longitudinal central axis of the workpiece radial direction is therefore no longer required for the grinding process.

    Ist eine hochpräzise Positionierung und Justage des Profilabrichtelements relativ zum Werkstück erfolgt, gibt der Verlauf des Profils des Abrichterbereichs des Abrichtelements den Schnittverlauf exakt für jeden Schleifvorgang vor, d.h. der Abrichterbereich muss genau in der Flucht des gewünschten Schnittverlaufs liegen. Damit ist es auch völlig unerheblich, wie viel beim Abrichtvorgang vom Durchmesser der Schleifscheibe entfernt wurde. Nachdem die Geometrie einer Zahnnut in das Werkstück geschliffen wurde, wird das Werkstück um einen der Teilkreisteilung der Verzahnungsgeometrie entsprechenden Winkel gedreht. Die Schleifscheibe wird zum erneuten Abrichten über den Abrichterbereich des Abrichtelements und in Fortsetzung einer geradlinigen Translationsbewegung für den nächsten Schleifvorgang zum Werkstück geführt. Ausgehend von der Annahme, dass der Abrichterbereich nicht in erheblichem Maße abgenutzt wurde, befindet sich die Schleifscheibe nach dem Abrichten immer relativ zum Werkstück in der korrekten relativen Höhe. Eventuelle Abnutzungserscheinungen am Abrichterbereich können durch eine manuelle oder auch automatisierte Justage kompensiert werden.Is a high-precision positioning and adjustment of the profile dressing relative to Workpiece takes the course of the profile of the dressing area of the Dressing element exactly before the cutting process for each grinding, i. of the Dressing area must lie exactly in the flight of the desired cutting process. Thus it is completely irrelevant how much the dressing process from the diameter the grinding wheel was removed. After the geometry of a tooth groove in the Workpiece was ground, the workpiece is one of the pitch circle division of Gear geometry turned corresponding angle. The grinding wheel becomes the re-dressing over the dressing area of the dressing element and in continuation a straight-line translational movement for the next grinding operation for Workpiece guided. Assuming that the dressing area is not in worn to a considerable extent, the grinding wheel is after the Always dressing relative to the workpiece at the correct relative height. any Wear and tear on the dressing area may be caused by a manual or even automated adjustment can be compensated.

    Die Relativbewegung zwischen Schleifscheibe und Werkstück kann durch eine Bewegung der Schleifscheibe in Bezug auf ein Maschinengestell oder eine Bewegung einer Werkzeughalterung erreicht werden. The relative movement between grinding wheel and workpiece can be achieved by a movement the grinding wheel with respect to a machine frame or a movement of a Tool holder can be achieved.

    Im Folgenden wird die Erfindung anhand von Figuren erläutert.In the following the invention will be explained with reference to figures.

    Es zeigt schematisch

    Fig. 1:
    eine Schleifvorrichtung in Seitenansicht,
    Fig. 2:
    ausschnittsweise eine Schleifscheibe und eine Zahnriemenform während des Schleifvorgangs,
    Fig. 3:
    ausschnittsweise eine Schleifscheibe während des Abrichtens,
    Fig. 4:
    eine weitere Schleifvorrichtung mit feststehendem Profildiamanten, und
    Fig.5:
    ausschnittsweise einen Profildiamanten.
    It shows schematically
    Fig. 1:
    a grinding device in side view,
    Fig. 2:
    a partial grinding wheel and a timing belt shape during the grinding process,
    3:
    a fragmentary grinding wheel during dressing,
    4:
    Another grinding device with fixed profile diamonds, and
    Figure 5:
    partially a profile diamond.

    Fig. 1 zeigt eine Schleifvorrichtung mit einem Maschinengestell 1, an dem ein horizontal verfahrbarer Schleiftisch 2 angebracht ist. Der Schleiftisch 2 trägt eine Werkstückhalterung 3, in der der walzenförmige Rohling 4 für eine Zahnriemenform zwischen einem Teilapparat 16 und einem Gegenlager 17 eingespannt ist. Über einen Drehmitnehmer 5 kann der Rohling 4 mittels eines Drehtellers 6 um eine horizontale Drehachse 7 kontrolliert gedreht werden. Die Drehachse 7 bildet im Rohling 4 gleichzeitig die Längsmittelachse des Rohlings 4. Die Werkstückhalterung 3 umfasst ein hier nicht gesondert dargestelltes hochpräzises Direktmesssystem, das eine genaue Drehwinkeleinstellung erlaubt. Oberhalb der Werkstückhalterung 3 ist an einer Schleifscheibenhalterung 8 eine Schleifscheibe 9 drehbar fixiert. Die Schleifscheibenhalterung 8 ist hochpräzise in vertikaler Richtung kontrolliert verfahrbar. Um aus dem Rohling 4 eine Zahnriemenform zu erhalten, muss in den Umfang des Rohlings 4 das Gegenprofil der Zahnriemenverzahnung eingearbeitet werden, wobei die Verzahnung in Richtung der Längsmittelachse des Rohlings 4 geradlinig und konstant ist. Der Umfang bildet nunmehr im Querschnitt betrachtet die Matrize für die Zahnriemenverzahnung.Fig. 1 shows a grinding device with a machine frame 1, on which a horizontal movable grinding table 2 is attached. The grinding table 2 carries a workpiece holder 3, in which the roller-shaped blank 4 for a toothed belt form between a Dividing unit 16 and an abutment 17 is clamped. About a rotary driver 5 the blank 4 can be controlled by means of a turntable 6 about a horizontal axis of rotation 7 to be turned around. The axis of rotation 7 forms in the blank 4 at the same time the longitudinal central axis of the blank 4. The workpiece holder 3 does not include a separate here presented high-precision direct measuring system, the exact rotational angle adjustment allowed. Above the workpiece holder 3 is on a grinding wheel holder. 8 a grinding wheel 9 rotatably fixed. The grinding wheel holder 8 is highly precise in vertical direction controlled movable. To form a toothed belt shape from the blank 4 To obtain in the scope of the blank 4, the counter profile of Toothed belt teeth are incorporated, the toothing in the direction of Longitudinal axis of the blank 4 is rectilinear and constant. The scope now forms viewed in cross-section, the die for the toothed belt toothing.

    Die Schleifscheibe 9 weist auf ihrem Umfang ein Profil 10 auf, das in einer vergrößerten Darstellung in Fig. 2 sichtbar ist. Das Umfangsprofil 10 der Schleifscheibe 9 entspricht dem gewünschten Profil einer Zahnnut der Zahnriemenform. Für die Herstellung der Zahnriemenform wird der Rohling 4 mittels des Schleiftisches 2 bei abgesenkter Schleifscheibe 9 derart verfahren, dass die Schleifscheibe 9 über die ganze Länge des Rohlings 4 hinweg in den Rohling 4 die Matrize für einen kompletten Zahn des Zahnriemens einschneidet. Hiernach wird der Rohling 4 um einen vorgegebenen Winkel α gedreht und die nächste Zahnmatrize erzeugt. Bei jedem Schleifvorgang wird auch der Außendurchmesser des Rohlings 4 mitgeschliffen, so dass bei einer fertigen Zahnriemenform die gesamte Mantelfläche geschliffen ist.The grinding wheel 9 has on its circumference a profile 10, which in an enlarged Representation in Fig. 2 is visible. The circumferential profile 10 of the grinding wheel 9 corresponds the desired profile of a Zahnnut the timing belt shape. For the production of Timing belt shape is the blank 4 by means of the grinding table 2 at lowered Grinding wheel 9 so moved that the grinding wheel 9 over the entire length of the Blanks 4 in the blank 4, the die for a complete tooth of Timing belt cuts in. After that, the blank 4 is at a predetermined angle α turned and the next tooth matrix generated. At every grinding process will also the outside diameter of the blank 4 mitgeschliffen, so that in a finished Timing belt shape the entire surface is ground.

    Da die Schleifscheibe 9 bei zunehmendem Einsatz abnutzt, kann das Umfangsprofil 10 der Schleifscheibe 9 mit einem Abrichtstift 11 vor jedem Schleifvorgang neu abgerichtet werden. Dies erfolgt mit Hilfe eines CNC-gesteuerten Prozesses. Der Abrichtstift 11 ist zum einem in Bezug zur Drehachse der Schleifscheibe axialer als auch in radialer Richtung verfahrbar. Zudem weist der Abrichtstift 11 noch eine Abrichtschwenkachse 12 auf, die im Wesentlichen senkrecht zur axialen und radialen Richtung und durch den Mittelpunkt eines runden Diamanten 13 an der Spitze des Abrichtstiftes 11 verläuft. Mit derartigen Freiheitsgraden ausgestattet, kann mit dem Abrichtstift 11 nahezu jedes beliebige Profil in den Umfang der Schleifscheibe 9 eingegeben werden. Insbesondere ist es möglich, feine Unterstrukturen in das Umfangsprofil 10 einzuarbeiten. Es können Genauigkeiten von bis zu +/- 0,01 mm erzielt werden. Um diese Genauigkeit erreichen zu können, kann es sinnvoll sein, eine variable Vorschubgeschwindigkeit des Abrichtstiftes 11 vorzusehen, so dass z.B. in Bereichen kleiner Radien im Umfangsprofil 10 mit geringerer Vorschubgeschwindigkeit gearbeitet wird. Des Weiteren kann ein virtueller Diamantradius für die CNC-Steuerung vorgegeben werden. Auf diese Weise kann z.B. eine konstante Abweichung von der Ideallinie im Profilverlauf leicht korrigiert werden, ohne die gesamte CNC-Programmierung ändern zu müssen.Since the grinding wheel 9 wears off with increasing use, the circumferential profile 10 can the grinding wheel 9 with a dressing pin 11 before each grinding re-dressed become. This is done with the help of a CNC-controlled process. The dressing pin 11 is for one with respect to the axis of rotation of the grinding wheel axialer as well as in radial Direction movable. In addition, the dressing pin 11 still has a dressing pivot axis 12 substantially perpendicular to the axial and radial directions and through the Center of a round diamond 13 at the top of Abrichtstiftes 11 runs. With equipped with such degrees of freedom, can with the dressing pen 11 almost every Any profile can be entered in the circumference of the grinding wheel 9. Especially it is possible to incorporate fine substructures in the circumferential profile 10. It can Accuracies of up to +/- 0.01 mm can be achieved. To achieve this accuracy It may be useful to have a variable feed rate of the To provide dressing pen 11, so that e.g. in areas of small radii in the circumferential profile 10 is operated at a lower feed rate. Furthermore, a virtual diamond radius for the CNC control. In this way can e.g. a constant deviation from the ideal line in the course of the profile slightly corrected without having to change the entire CNC programming.

    Für den Abrichtvorgang wird die Schleifscheibe ständig mit Hilfe eines Spritz-Düsenpaares 14 (Fig.1) gereinigt, das beide Flanken des Umfangprofils 10 hinreichend gleichmäßig erreicht. For the dressing process, the grinding wheel is constantly using a spray nozzle pair 14 (Fig.1) cleaned, the two flanks of the peripheral profile 10 sufficient reached evenly.

    Während des Schleifvorganges wird ein weiteres Spritzdüsenpaar 15 eingesetzt, das mit Hochdruck die Schleifscheibe 9 reinigt und somit deren Zusetzen verhindert. Das Düsenpaar 15 ist in unmittelbarer Nähe der Schleifscheine 9 angeordnet.During the grinding process, another spray nozzle pair 15 is used, the with high pressure, the grinding wheel 9 cleans and thus prevents their clogging. The Nozzle pair 15 is arranged in the immediate vicinity of the grinding papers 9.

    Um den Gesamtprozess wirtschaftlich zu gestalten, kann es sinnvoll sein, den Rohling 4 mit bekannten Fräsmaschinen vorzubereiten, so dass die Schleifscheibe 9 weniger verschleißt.To make the overall process economical, it may be useful to the blank 4 to prepare with known milling machines, so that the grinding wheel 9 wears less.

    Fig. 4 zeigt einen alternativen Aufbau einer Schleifvorrichtung. Einander entsprechende Teile in verschiedenen Figuren sind mit den gleichen Bezugszahlen versehen. Der Rohling 4a ist in Fig. 4 kürzer als in Fig. 1. Die Werkzeughalterung 3 weist in ihren Teilapparaten 16 und 17 den gleichen Abstand auf wie in Fig. 1. Es ist jedoch ein mit Streben 20 versehener Längenadapter 18 vorgesehen. Mit Hilfe eines oder mehrerer Längenadapter 18 kann man auch bei unterschiedlichen Längen von Rohlingen 4a ein Verstellen der Teilapparate 16 und 17 der Werkstückhalterung 3 vermeiden, um eine einmal aufwendig erzielte hohe Exaktheit im Abstand zu erhalten.Fig. 4 shows an alternative construction of a grinding device. Corresponding one another Parts in different figures are provided with the same reference numbers. Of the Blank 4a is shorter in Fig. 4 than in Fig. 1. The tool holder 3 has in its dividers 16 and 17 the same distance as in Fig. 1. However, it is one with struts Provided 20 provided length adapter 18. With the help of one or more length adapters 18 can also be at different lengths of blanks 4a an adjustment the dividing devices avoid 16 and 17 of the workpiece holder 3 to a once consuming obtained high accuracy in the distance.

    Auf dem Gegenlager 17 ist ein Profildiamant 19 angeordnet, der zum Abrichten der Schleifscheibe 9 dient und in Fig.5 vergrößert dargestellt ist. Der Profildiamant 19 weist eine Abrichtkante 21 auf, deren Profil dem Profil der gewünschten Zahnnut der Zahnriemenform entspricht. Vor einem Schleifvorgang wird der Schleiftisch 2 in eine Ausgangsposition gebracht, bei der die Schleifscheibe 9 in Fig. 4 links vom Profildiamanten 19 positioniert ist. Die Schleifscheibenhalterung 8 wird dann soweit abgesenkt, dass bei einem Verfahren des Schleiftisches 2 nach links (in Fig. 4) der äußere Umfang der rotierenden Schleifscheibe 9 von der Abrichtkante 21 des Profildiamanten 9 mit dem entsprechenden Gegenprofil versehen wird. Somit erhält der äußere Umfang der Schleifscheibe 9 das Profil einer kompletten Zahnnut der gewünschten Zahnriemenform.On the counter bearing 17, a profile diamond 19 is arranged, for dressing the Grinding wheel 9 serves and is shown enlarged in Figure 5. The profile diamond 19 has a dressing edge 21, the profile of the profile of the desired Zahnnut the Timing belt shape corresponds. Before a grinding process, the grinding table 2 in a Starting position brought at which the grinding wheel 9 in Fig. 4 left of the profile diamond 19 is positioned. The grinding wheel holder 8 is then lowered so far that in a process of the grinding table 2 to the left (in Fig. 4), the outer circumference the rotating grinding wheel 9 from the dressing edge 21 of the profile diamond 9 with the corresponding counter-profile is provided. Thus, the outer circumference of the Grinding wheel 9 the profile of a complete tooth groove of the desired Toothed shape.

    Der Profildiamant 19 ist derart ausgerichtet, dass durch ein weiteres Verfahren des Schleiftisches 2 die Schleifscheibe 9 ohne vertikale Positionsveränderung in korrekter Arbeitsposition das Werkstück 4a erreicht und in einem einzigen Schleifvorgang die Matrize für einen kompletten Zahn des Zahnriemens inklusive Zahnfuß herstellt. Hiernach wird die Schleifscheibenhalterung 8 angehoben und der Schleiftisch 2 wieder in die Ausgangsposition verfahren. Die Schleifscheibenhalterung 8 wird wieder abgesenkt, jedoch wegen der beim Schleifvorgang gegebenen Abnutzung um eine geringe Strecke weiter als vor dem vorhergehenden Durchgang. Auf diese Weise wird der Umfang der Schleifscheibe 9 vor jedem Schleifen neu abgerichtet. Da die Position der Abrichtkante 21 relativ zur Drehachse 7 unverändert geblieben ist, ist zudem gewährleistet, dass die Schleifscheibe 9 das Werkstück 4a wieder in korrekter Arbeitsposition erreicht und die in das Werkstück 4a geschliffenen Matrizen der Zahnriemenzähne hinsichtlich der Zahngeometrie und der Zahnhöhe exakt gleich sind. Auf diese Weise wird der komplette Umfang der Zahnriemenform inklusive Außendurchmesser mit der Schleifscheibe 9 geschliffen.The profile diamond 19 is oriented such that by a further method of the Grinding table 2 the grinding wheel 9 without vertical position change in correct Working position reaches the workpiece 4a and in a single grinding process the Matrix for a complete tooth of the toothed belt including tooth root manufactures. hereafter the grinding wheel holder 8 is raised and the grinding table 2 back in move the starting position. The grinding wheel holder 8 is lowered again, However, because of the given during grinding wear by a small distance further than before the previous round. In this way, the scope of the Grinding wheel 9 re-dressed before each grinding. Because the position of the dressing edge 21 has remained unchanged relative to the axis of rotation 7, it is also ensured that the Grinding wheel 9, the workpiece 4 a again reached in the correct working position and the in the workpiece 4a ground dies of the toothed belt teeth in terms of Tooth geometry and the tooth height are exactly the same. In this way, the complete Scope of the timing belt shape including outer diameter with the grinding wheel 9 ground.

    Der Profildiamant 19 ist in der vertikalen Richtung in seiner Position veränderbar angebracht, damit eventuelle Abnutzungen kompensiert werden können oder eine Anpassung an unterschiedliche Werkstückdurchmesser möglich ist. The profile diamond 19 is mounted variable in position in the vertical direction, so that any wear can be compensated or an adjustment to different workpiece diameter is possible.

    BezugszeichenlisteLIST OF REFERENCE NUMBERS

    1.1.
    Maschinengestellmachine frame
    2.Second
    Schleiftischgrinding table
    3.Third
    WerkstückhalterungWorkpiece holder
    4.4th
    Rohlingblank
    5.5th
    Drehmitnehmerrotary drivers
    6.6th
    Drehtellerturntable
    7.7th
    Drehachseaxis of rotation
    8.8th.
    SchleifscheibenhalterungGrinding wheel holder
    9.9th
    Schleifscheibegrinding wheel
    10.10th
    Umfangsprofilcircumferential profile
    11.11th
    AbrichtstiftDresser
    12.12th
    AbrichtschwenkachseAbrichtschwenkachse
    13.13th
    Diamantdiamond
    14.14th
    SpritzdüsenpaarSpray nozzle pair
    15.15th
    Düsejet
    16.16th
    Teilapparatdividing head
    17.17th
    Gegenstückcounterpart
    18.18th
    Längenadapterlength adapter
    19.19th
    Profildiamantprofile diamond
    20.20th
    Strebestrut
    21.21st
    Abrichtkantedressing edge

    Claims (2)

    Vorrichtung zur Herstellung von Zahnriemenformen, umfassend a) eine Werkstückhalterung (3), b) Drehmittel (6,5), mit denen mindestens ein in der Werkstückhalterung (3) eingespanntes, im Wesentlichen zylindrisches Werkstück (4,4a) um vorgegebene Winkel um seine Längsmittelachse kontrolliert drehbar ist, und c) ein relativ zur Werkstückhalterung (3) verfahrbares spangebendes Werkzeug, wobei d) das mindestens eine Werkzeug eine Schleifscheibe (9) ist, und e) Abrichtmittel zum Abrichten eines bestimmten Umfangprofils (10) der mindestens einen Schleifscheibe (9) vorgesehen sind, wobei das Umfangsprofil (10) der Schleifscheibe (9) derart abrichtbar ist, dass es dem Profil einer vollständigen Zahnnut der gewünschten Zahnriemenform entspricht,
    dadurch gekennzeichnet, dass     f) die Abrichtmittel mindestens ein Profilabrichtelement (19) mit einem profilierten Abrichterbereich (21) umfassen, wobei das Profil des Abrichterbereichs (21) das Gegenprofil von zumindest einem Teil des gewünschten Umfangprofils der mindestens einen Schleifscheibe (9) ist, und g) das Profilabrichtelement (19) ein Abrichthartkörper, beispielsweise aus Diamant, mit einem kantenartigen Abrichterbereich ist.     Device for producing toothed belt molds, comprising a) a workpiece holder (3), b) rotating means (6,5), with which at least one in the workpiece holder (3) clamped, substantially cylindrical workpiece (4,4a) controlled by predetermined angle about its longitudinal central axis is rotatable, and c) a relative to the workpiece holder (3) movable cutting tool, wherein d) the at least one tool is a grinding wheel (9), and e) dressing means for dressing a certain peripheral profile (10) of the at least one grinding wheel (9) are provided, wherein the peripheral profile (10) of the grinding wheel (9) is dressable so that it corresponds to the profile of a complete tooth groove of the desired timing belt shape,
    characterized in that     f) the dressing means comprise at least one profile dressing element (19) with a profiled dressing area (21), the profile of the dressing area (21) being the mating profile of at least part of the desired peripheral profile of the at least one grinding wheel (9), and g) the profile dressing element (19) is a hard dressing body, for example of diamond, with an edge-like dressing area.     Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das mindestens eine Profilabrichtelement relativ zum Werkstückhalter derart positioniert und justierbar ist, dass in Richtung der Längsmittelachse des mindestens einen eingespannten Werkzeugs betrachtet die Projektion des Profils des Abrichterbereichs auf einer Werkzeugstimseite dem Profil des Querschnitts des bei einem Schleifvorgang erstrebten Schnittes entspricht.Apparatus according to claim 1, characterized in that the at least one profile dressing relative to the workpiece holder is positioned and adjustable so that viewed in the direction of the longitudinal center axis of the at least one clamped tool, the projection of the profile of the dressing area on a Werkzeugstimseite the profile of the cross section of a grinding process aspired cut corresponds.
    EP05007364A 2000-11-28 2001-11-28 Device for the production of toothed belt forms Expired - Lifetime EP1568441B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE10059067 2000-11-28
    DE10059067A DE10059067A1 (en) 2000-11-28 2000-11-28 Method and device for manufacturing toothed belt molds and gear wheels
    EP01995545A EP1339527B2 (en) 2000-11-28 2001-11-28 Method for producing molds for toothed belts

    Related Parent Applications (2)

    Application Number Title Priority Date Filing Date
    EP01995545A Division EP1339527B2 (en) 2000-11-28 2001-11-28 Method for producing molds for toothed belts
    EP01995545.9 Division 2001-11-28

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    EP1568441A1 true EP1568441A1 (en) 2005-08-31
    EP1568441B1 EP1568441B1 (en) 2007-08-15

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    EP (2) EP1339527B2 (en)
    JP (1) JP2004524169A (en)
    KR (1) KR100783206B1 (en)
    CN (1) CN1216721C (en)
    AT (2) ATE296711T1 (en)
    AU (1) AU2002226281A1 (en)
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    ES (2) ES2243593T5 (en)
    MX (1) MXPA03004648A (en)
    PL (1) PL201008B1 (en)
    PT (2) PT1568441E (en)
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    DE10059067A1 (en) 2002-06-06
    MXPA03004648A (en) 2004-10-14
    JP2004524169A (en) 2004-08-12
    SI1339527T2 (en) 2011-06-30
    CN1501851A (en) 2004-06-02
    US20040029497A1 (en) 2004-02-12
    ATE369939T1 (en) 2007-09-15
    PT1339527E (en) 2005-11-30
    KR100783206B1 (en) 2007-12-06
    DE50106409D1 (en) 2005-07-07
    ES2291996T3 (en) 2008-03-01
    ES2243593T5 (en) 2011-08-30
    EP1339527B1 (en) 2005-06-01
    EP1568441B1 (en) 2007-08-15
    SI1568441T1 (en) 2008-02-29
    KR20040028687A (en) 2004-04-03
    CN1216721C (en) 2005-08-31
    PL366126A1 (en) 2005-01-24
    PL201008B1 (en) 2009-02-27
    EP1339527A1 (en) 2003-09-03
    DE50112885D1 (en) 2007-09-27
    US7125316B2 (en) 2006-10-24
    AU2002226281A1 (en) 2002-06-11
    SI1339527T1 (en) 2005-12-31
    ATE296711T1 (en) 2005-06-15
    BR0115685A (en) 2003-09-09
    EP1339527B2 (en) 2011-04-27
    WO2002043919A1 (en) 2002-06-06
    PT1568441E (en) 2007-11-13
    ES2243593T3 (en) 2005-12-01

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