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EP1339527B2 - Method for producing molds for toothed belts - Google Patents
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EP1339527B2 - Method for producing molds for toothed belts - Google Patents

Method for producing molds for toothed belts Download PDF

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Publication number
EP1339527B2
EP1339527B2 EP01995545A EP01995545A EP1339527B2 EP 1339527 B2 EP1339527 B2 EP 1339527B2 EP 01995545 A EP01995545 A EP 01995545A EP 01995545 A EP01995545 A EP 01995545A EP 1339527 B2 EP1339527 B2 EP 1339527B2
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EP
European Patent Office
Prior art keywords
profile
grinding wheel
workpiece
dressing
grinding
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EP01995545A
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German (de)
French (fr)
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EP1339527B1 (en
EP1339527A1 (en
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Peter Bäumler
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Priority to SI200130403T priority Critical patent/SI1339527T2/en
Priority to EP05007364A priority patent/EP1568441B1/en
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Publication of EP1339527B1 publication Critical patent/EP1339527B1/en
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Classifications

    • 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

  • the die for the timing belt is not milled but produced by grinding with specially profiled grinding wheels with a grinding movement parallel to the longitudinal center axis of the workpiece.
  • Tooth groove is understood to mean the full area from the head of a tooth to the head of the adjacent tooth. The grinding of two adjacent tooth grooves thus results in producing a complete tooth of the toothed belt shape, i. H. Also, the outer diameter of the timing belt shape is ground. For the geometry of the toothed groove of the toothed belt form, the shrinkage of the toothed belt material during cooling in the manufacturing process must be considered.
  • the method according to the invention is carried out such that the circumferential profile is produced and / or dressed on a profile dressing element with a profiled edge-like dressing area.
  • a CNC control for dressing because the profiled dressing area dictates a fixed profile. This can be advantageous, in particular, when large quantities have to be produced with identical toothing geometries.
  • the relative movement between the grinding wheel and the workpiece can be determined by a movement of the grinding wheel with respect to a machine frame or a movement of a tool holder can be achieved.
  • This variant has the advantage that a complex CNC control for the movement of the dressing means is not required.
  • a profile dressing element is particularly useful when variations of the profit form are not needed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Fish Paste Products (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Seal Device For Vehicle (AREA)
  • Preliminary Treatment Of Fibers (AREA)

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 ein Verfahren zur Herstellung von Zahnriemenformen.The invention relates to a method for producing toothed belt molds.

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-toothed on their shell circumference and used as an inner core in the manufacture of toothed belts, e.g. from Perbunan gum or plastic, needed. The heated toothed belt material is pressed into the toothing of the toothed belt shape. The toothing of the toothed belt forms 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 the tooth geometries of timing belts has 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 toothed belt shapes, it is therefore generally necessary to post-treat the surface of the toothed belt form.

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, which should meet the demands for high performance and smoothness.

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

Diese Aufgabe wird durch ein Verfahren gemäß Anspruch 1 gelöst.This object is achieved by a method according to claim 1.

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 produced by grinding with specially profiled grinding wheels with a grinding movement parallel to the longitudinal center axis of the workpiece. As a result, a quality of the surface of the finished workpiece can be achieved, which eliminates the need for aftertreatment. Tooth groove is understood to mean the full area from the head of a tooth to the head of the adjacent tooth. The grinding of two adjacent tooth grooves thus results in producing a complete tooth of the toothed belt shape, i. H. Also, the outer diameter of the timing belt shape is ground. For the geometry of the toothed groove of the toothed belt form, the shrinkage of the toothed belt material during cooling in the manufacturing process must be considered.

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 to easily create the finest substructures in the tooth profile, z. B. a wavy sub-profile in the tooth flanks. For this purpose, for. B. running parallel to the toothed belt axis forming channels in the profile. Timing belts with such sub-profiles are in the DE 199 08 672 C1 disclosed.

Der Abrichtvorgang ist aufgrund der allmählichen Abnutzung der Schleifscheibe erforderlich.The dressing process is required due to the gradual wear of the grinding wheel.

Das erfindungsgemäße Verfahren wird so ausgeführt, dass das Umfangsprofil an einem Profilabrichtelement mit einem profilierten Kantenartiger Abrichterbereich hergestellt und/oder abgerichtet wird. Hierbei erübrigt sich eine CNC-Steuerung für das Abrichten, da der profilierte Abrichterbereich ein festes Profil vorgibt. Dies kann insbesondere dann vorteilhaft sein, wenn hohe Stückzahlen mit identischen Verzahnungsgeometrien herzustellen sind.The method according to the invention is carried out such that the circumferential profile is produced and / or dressed on a profile dressing element with a profiled edge-like dressing area. There is no need for a CNC control for dressing because the profiled dressing area dictates a fixed profile. This can be advantageous, in particular, when large quantities have to be produced with identical toothing geometries.

Schließlich kann das erfindungsgemäße Verfahren auch so ausgeführt werden, dass das Abrichten der rotierenden Schleifscheibe und das anschließende Schleifen des Werkstückes in einer einzigen geradlinigen translatorischen Bewegung der Schleifscheibe relativ zum Werkstück erfolgt. Dies kann durch geeignete Positionierung des Profilabrichtelements erreicht werden. 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. 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.Finally, the inventive method can also be carried out so that the dressing of the rotating grinding wheel and the subsequent grinding of the workpiece is carried out in a single rectilinear translational movement of the grinding wheel relative to the workpiece. This can be achieved by suitable positioning of the profile dressing element. If a high-precision positioning and adjustment of the profile dressing element relative to the workpiece is carried out, the profile of the profile of the dressing area of the dressing element specifies the cutting path exactly for each grinding operation, i. The dressing area must be exactly in alignment with the desired cutting process. After the geometry of a toothed groove has been ground into the workpiece, the workpiece is rotated about an angle corresponding to the pitch circle pitch of the toothing geometry. The grinding wheel is fed to the workpiece for re-dressing over the dressing area of the dressing element and in continuation of a straight-line translational movement for the next grinding operation. Assuming that the dressing area has not been significantly worn, the dressing wheel is always at the correct relative height after dressing, relative to the workpiece. Any signs of wear on the dressing area can be compensated by a manual or automated adjustment.

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 the grinding wheel and the workpiece can be determined by a movement of the grinding wheel with respect to a machine frame or a movement of a tool holder can be achieved.

Das erfindungsgemäße Verfahren kann mit einer Vorrichtung durchgeführt werden, welche eine Werkstückhalterung, Drehmittel, mit denen mindestens ein in der Werkstückhalterung eingespanntes, im wesentlichen zylindrisches Werkstück um vorgegebene Winkel um seine Längsmittelachse kontrolliert drehbar ist, und ein relativ zur Werkstückhalterung verfahrbares spangebendes Werkzeug umfasst. Dabei ist das mindestens eine Werkzeug eine Schleifscheibe, und Abrichtmittel zum Abrichten eines bestimmten Umfangprofils der mindestens einen Schleifscheibe sind vorgesehen, wobei das Umfangsprofil der Schleifscheibe derart abrichtbar ist, dass es dem Profil einer vollständigen Zahnnut der gewünschten Zahnriemenverzahnung entspricht.The inventive method can be carried out with a device which comprises a workpiece holder, rotating means with which at least one clamped in the workpiece holder, substantially cylindrical workpiece controlled by predetermined angle about its longitudinal central axis, and a movable relative to the workpiece holder cutting tool. In this case, the at least one tool is a grinding wheel, and dressing means for dressing a certain circumferential profile of the at least one grinding wheel are provided, wherein the circumferential profile of the grinding wheel can be dressed so that it corresponds to the profile of a complete tooth groove of the desired toothed belt toothing.

Die Vorrichtung kann auch so ausgebildet sein, 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, wobei das Profilabrichtelement ein Abrichthartkörper, beispielsweise aus Diamant, mit einem kantenartigen Abrichterbereich ist.The device may also be configured such that the dressing means comprise at least one profile dressing element with a profiled dressing area, the profile of the dressing area being the mating profile of at least part of the desired peripheral profile of the at least one grinding wheel, the profile dressing element being a dressing hard body, for example made of diamond, with a ridge-like dressing area.

Diese Variante hat den Vorteil, dass eine aufwendige CNC-Steuerung für die Bewegung der Abrichtmittel nicht erforderlich ist. Ein Profilabrichtelement ist insbesondere dann sinnvoll, wenn Variationen der Profitform nicht benötigt werden.This variant has the advantage that a complex CNC control for the movement of the dressing means is not required. A profile dressing element is particularly useful when variations of the profit form are not needed.

Es muss stets gelten, dass die Schleifscheibe einerseits hinreichend stabil ist, um einen guten Abtrag mit hoher Oberflächenqualität am Werkstück erreichen zu können. Andererseits muss das Schleifscheibenmaterial noch so weich sein, dass die zur Abrichtung eingesetzten Mittel nicht verschleißen.It must always be considered that the grinding wheel is on the one hand sufficiently stable in order to be able to achieve good removal with high surface quality on the workpiece. On the other hand, the grinding wheel material must still be so soft that the means used for the dressing do not wear out.

Schließlich kann die 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 Werkzeugstimseite dem Profil des Querschnitts des bei einem Schleifvorgang erstrebten Schnittes entspricht.Finally, the device can also be designed such that the at least one profile dressing element is positioned and adjustable relative to the workpiece holder such 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.

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. Zudem ist dann völlig unerheblich, wie viel beim Abrichtvorgang vom Durchmesser der Schleifscheibe entfernt wurde, da das Abrichtkantenprofil oder das Profil der Profilrolle genau in der Flucht des bei dem Schleifvorgang erstrebten Schnittes liegt.With such an arrangement, it is possible to first guide the rotating grinding wheel with a single rectilinear translational movement along the profile hard body and thereby achieve the desired dressing of the peripheral profile of the grinding wheel and then perform the grinding operation on the workpiece. An adjustment of the grinding wheel towards the longitudinal center axis of the workpiece radial direction is thus no longer required for the grinding process. In addition, it is then completely irrelevant how much was removed during the dressing process from the diameter of the grinding wheel, since the dressing edge profile or the profile of the profile roller is exactly aligned with the desired during the grinding process section.

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 eines nicht unter den Schutz des Patents fallenden 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 section of a grinding wheel during a dressing not covered by the patent,
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 horizontally movable grinding table 2 is mounted. The grinding table 2 carries a workpiece holder 3, in which the roller-shaped blank 4 is clamped for a toothed belt shape between a dividing head 16 and an abutment 17. About a rotary driver 5, the blank 4 by a turntable 6 are controlled to be rotated about a horizontal axis of rotation 7. The axis of rotation 7 simultaneously forms the longitudinal center axis of the blank 4 in the blank 4. The workpiece holder 3 comprises a high-precision direct measuring system, not separately shown here, which permits an exact rotational angle adjustment. Above the workpiece holder 3, a grinding wheel 9 is rotatably fixed to a grinding wheel holder 8. The grinding wheel holder 8 is highly precisely controlled in the vertical direction movable. In order to obtain a toothed belt shape from the blank 4, the counter profile of the toothed belt toothing must be incorporated in the circumference of the blank 4, the toothing being rectilinear and constant in the direction of the longitudinal central axis of the blank 4. The circumference now forms, seen 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 a 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 periphery a profile 10, which in an enlarged view in Fig. 2 is visible. The circumferential profile 10 of the grinding wheel 9 corresponds to the desired profile of a toothed groove of the toothed belt form. For the production of the toothed belt shape of the blank 4 is moved by means of the grinding table 2 with lowered grinding wheel 9 such that the grinding wheel 9 cuts over the entire length of the blank 4 away in the blank 4, the die for a complete tooth of the toothed belt. Thereafter, the blank 4 is rotated by a predetermined angle a and generates the next tooth matrix. During each grinding process, the outer diameter of the blank 4 is mitgeschliffen, so that in a finished toothed belt shape, the entire lateral surface is ground.

Da die Schleifscheibe 9 bei zunehmendem Einsatz abnutzt, wird das Umfangsprofil 10 der Schleifscheibe 9 vor jedem Schleifvorgang neu abgerichtet. Dies erfolgt mit Hilfe des nachfolgend beschriebenen CNC-gesteuerten Prozesses, der nicht zum Gegenstand des Patents gehört. 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 ändem zu müssen.Since the grinding wheel 9 wears down with increasing use, the circumferential profile 10 of the grinding wheel 9 is re-dressed before each grinding operation. This is done using the CNC-controlled process described below, which is not part of the patent. The Abrichtstift 11 is axially movable relative to the axis of rotation of the grinding wheel as well as in the radial direction. In addition, the dressing pin 11 also has a dressing pivot axis 12, which extends substantially perpendicular to the axial and radial directions and through the center of a round diamond 13 at the tip of the dressing pin 11. Equipped with such degrees of freedom, almost any profile can be entered into the circumference of the grinding wheel 9 with the dressing pin 11. In particular, it is possible to incorporate fine substructures in the circumferential profile 10. Accuracies of up to +/- 0.01 mm can be achieved. In order to achieve this accuracy, it may be useful to provide a variable feed rate of the dressing pin 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 can be specified for the CNC control. In this way, e.g. A constant deviation from the ideal line in the course of the profile can be easily 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 ), which reaches both edges of the peripheral profile 10 sufficiently uniform.

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, a further spray nozzle pair 15 is used, which cleans the grinding wheel 9 at high pressure 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 prepare the blank 4 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 parts in different figures are provided with the same reference numerals. The blank 4a is in Fig. 4 shorter than in Fig. 1 , The tool holder 3 has in its dividing devices 16 and 17 the same distance as in Fig. 1 , However, it is provided with a struts 20 length adapter 18 is provided. With the help of one or more length adapters 18, it is possible to avoid adjusting the divisors 16 and 17 of the workpiece holder 3, even with different lengths of blanks 4a, in order to obtain a high degree of accuracy achieved once at a 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, which serves for dressing the grinding wheel 9 and in Figure 5 is shown enlarged. The profile diamond 19 has a dressing edge 21 whose profile corresponds to the profile of the desired Zahnnut the timing belt shape. Before grinding, the grinding table 2 is brought into a starting position, in which the grinding wheel 9 in Fig. 4 is positioned to the left of the profile diamond 19. 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 periphery of the rotating grinding wheel 9 is provided by the dressing edge 21 of the profile diamond 9 with the corresponding counter-profile. Thus, the outer circumference of the grinding wheel 9 is given the profile of a complete toothed groove of the desired timing belt 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 Schteifscheibenhalterung 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 process of the grinding table 2, the grinding wheel 9 without vertical position change in the correct working position reaches the workpiece 4a and produces in a single grinding process, the die for a complete tooth of the belt including tooth root. Thereafter, the Schteifscheibenhalterung 8 is raised and the grinding table 2 moved back to the starting position. The grinding wheel holder 8 is lowered again, but because of the given during grinding wear by a small distance further than before the previous passage. In this way, the circumference of the grinding wheel 9 is re-dressed before each grinding. Since 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 reaches the workpiece 4a again in the correct working position and the dies of the toothed belt teeth ground in the workpiece 4a are exactly the same with respect to the tooth geometry and the tooth height. In this way, the complete scope of the Timing belt shape including outer diameter ground with the grinding wheel 9.

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 in the vertical direction in its position changeable, so that any wear can be compensated or adaptation 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)

  1. A method of producing molds for toothed belts, in which a matrix of the desired tooth belt toothing is introduced into the circumference of a workpiece, which is essentially cylindrical before processing, using a metal-cutting tool,
    characterized in that
    at least one rotating grinding wheel (9) having a profiled circumference is used as a metal-cutting tool, the peripheral profile (10) corresponding to the profile of a complete tooth groove of the desired mold for toothed belts, and
    the peripheral profile is produced and/or trimmed on a profiled edge-like trimming element (19) having a profiled trimming region (21).
  2. The method according to Claim 1,
    characterized in that the trimming of the rotating grinding wheel (9) and the subsequent grinding of the workpiece (4, 4a) are performed in one single linear translational movement of the grinding wheel (9) relative to the workpiece (4, 4a).
EP01995545A 2000-11-28 2001-11-28 Method for producing molds for toothed belts Expired - Lifetime EP1339527B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200130403T SI1339527T2 (en) 2000-11-28 2001-11-28 Method for producing molds for toothed belts
EP05007364A EP1568441B1 (en) 2000-11-28 2001-11-28 Device for the production of toothed belt forms

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10059067A DE10059067A1 (en) 2000-11-28 2000-11-28 Method and device for manufacturing toothed belt molds and gear wheels
DE10059067 2000-11-28
PCT/DE2001/004471 WO2002043919A1 (en) 2000-11-28 2001-11-28 Method and device for producing molds for toothed belts

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP05007364A Division EP1568441B1 (en) 2000-11-28 2001-11-28 Device for the production of toothed belt forms
EP05007364.2 Division-Into 2005-04-05

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EP1339527A1 EP1339527A1 (en) 2003-09-03
EP1339527B1 EP1339527B1 (en) 2005-06-01
EP1339527B2 true EP1339527B2 (en) 2011-04-27

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EP01995545A Expired - Lifetime EP1339527B2 (en) 2000-11-28 2001-11-28 Method for producing molds for toothed belts

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JP (1) JP2004524169A (en)
KR (1) KR100783206B1 (en)
CN (1) CN1216721C (en)
AT (2) ATE369939T1 (en)
AU (1) AU2002226281A1 (en)
BR (1) BR0115685A (en)
DE (3) DE10059067A1 (en)
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PL (1) PL201008B1 (en)
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SI1568441T1 (en) 2008-02-29
DE10059067A1 (en) 2002-06-06
ES2291996T3 (en) 2008-03-01
PL366126A1 (en) 2005-01-24
EP1568441B1 (en) 2007-08-15
PT1568441E (en) 2007-11-13
EP1339527B1 (en) 2005-06-01
SI1339527T2 (en) 2011-06-30
JP2004524169A (en) 2004-08-12
ATE296711T1 (en) 2005-06-15
ATE369939T1 (en) 2007-09-15
CN1216721C (en) 2005-08-31
ES2243593T3 (en) 2005-12-01
EP1339527A1 (en) 2003-09-03
US20040029497A1 (en) 2004-02-12
KR100783206B1 (en) 2007-12-06
PT1339527E (en) 2005-11-30
ES2243593T5 (en) 2011-08-30
US7125316B2 (en) 2006-10-24
AU2002226281A1 (en) 2002-06-11
WO2002043919A1 (en) 2002-06-06
MXPA03004648A (en) 2004-10-14
SI1339527T1 (en) 2005-12-31
PL201008B1 (en) 2009-02-27
DE50106409D1 (en) 2005-07-07
CN1501851A (en) 2004-06-02
KR20040028687A (en) 2004-04-03
EP1568441A1 (en) 2005-08-31
BR0115685A (en) 2003-09-09
DE50112885D1 (en) 2007-09-27

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