EP1339527A1 - Method and device for producing molds for toothed belts - Google Patents

Method and device for producing molds for toothed belts

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Publication number
EP1339527A1
EP1339527A1 EP01995545A EP01995545A EP1339527A1 EP 1339527 A1 EP1339527 A1 EP 1339527A1 EP 01995545 A EP01995545 A EP 01995545A EP 01995545 A EP01995545 A EP 01995545A EP 1339527 A1 EP1339527 A1 EP 1339527A1
Authority
EP
European Patent Office
Prior art keywords
dressing
profile
grinding wheel
workpiece
toothed belt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01995545A
Other languages
German (de)
French (fr)
Other versions
EP1339527B2 (en
EP1339527B1 (en
Inventor
Peter Bäumler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
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Application filed by Individual filed Critical Individual
Priority to EP05007364A priority Critical patent/EP1568441B1/en
Priority to SI200130403T priority patent/SI1339527T2/en
Publication of EP1339527A1 publication Critical patent/EP1339527A1/en
Application granted granted Critical
Publication of EP1339527B1 publication Critical patent/EP1339527B1/en
Publication of EP1339527B2 publication Critical patent/EP1339527B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 invention relates to a method and a device for producing toothed belt molds.
  • Timing belt shapes are usually tubular steel rollers, which are straight-toothed on their circumference and as the inner core in the production of timing belts, e.g. made of Perbunan rubber or plastic.
  • 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 matrix of the toothed belt toothing.
  • toothed belt shapes by milling from cylindrical blanks.
  • the requirements for the exactness of the tooth geometry of timing belts have increased enormously. So the tooth surface should be as smooth as possible, i.e. if possible, do not have any images of the milling grooves in the toothed belt shapes.
  • milling toothed belt molds it is therefore usually necessary to re-treat the surface of the toothed belt mold.
  • This object is achieved in a method in which a die of the desired toothed belt toothing or the desired toothed wheel toothing is worked into the essentially cylindrical circumference of a workpiece by means of a cutting tool, in that at least one rotating grinding wheel with a profiled profile is used as the cutting tool scope is used, the circumferential profile corresponding to the profile of a complete tooth groove of the desired toothed belt shape.
  • the matrix for the toothed belt is therefore not milled, but is created by grinding with specially profiled grinding wheels with a grinding movement parallel to the longitudinal center axis of the workpiece. In this way, a quality of the surface of the finished workpiece can be achieved, which eliminates the need for post-treatment.
  • the tooth groove is understood to mean the complete area from the head of one tooth to the head of the adjacent tooth. The grinding of two adjacent tooth grooves thus leads to the generation of a complete tooth of the toothed belt shape, i.e. H. the outer diameter of the toothed belt shape is also ground.
  • the shrinkage of the toothed belt material during cooling in the manufacturing process must be taken into account.
  • profiled grinding wheels also allows to easily create the finest substructures in the tooth profile, e.g. B. a wavy sub-profile in the area of the tooth flanks. For this, e.g. B. channels parallel to the toothed belt axis are introduced into the profile. Timing belts with such sub-profiles are disclosed in DE 199 08 672 C1.
  • the method according to the invention can also be carried out in such a way that the peripheral profile of the grinding wheel is produced and / or dressed using a CNC-controlled dressing pin.
  • the dressing process is necessary due to the gradual wear of the grinding wheel.
  • the CNC control makes it possible to incorporate and dress almost any high-precision profiles in the circumference of the grinding wheel and thus to be able to produce varying tooth geometries in a relatively simple manner.
  • the method according to the invention can also be carried out in such a way that the circumferential profile is produced and / or dressed on a profile dressing element with a profiled dressing area.
  • the method according to the invention can also be carried out in such a way that the dressing of the rotating grinding wheel and the subsequent grinding of the workpiece takes place in a single straight-line translatory movement of the grinding wheel relative to the workpiece.
  • This can be achieved by suitable positioning of the profile dressing element.
  • the profile profile of the dressing area of the dressing element specifies the cutting profile exactly for each grinding operation, i.e. the dressing area must lie exactly in line with the desired cutting profile.
  • the workpiece is rotated through an angle corresponding to the pitch circle division of the tooth geometry.
  • the grinding wheel is guided over the dressing area of the dressing element for further dressing and in continuation of a straight-line translational movement for the next grinding process to the workpiece. Based on the assumption that the dressing area has not been significantly worn, the grinding wheel is always at the correct relative height relative to the workpiece after dressing. Any wear and tear on the dressing area can be compensated for by manual or automated adjustment.
  • the relative movement between the grinding wheel and the workpiece can be achieved by moving the grinding wheel in relation to a machine frame or by moving a tool holder.
  • a device comprising a workpiece holder, rotating means with which at least one essentially cylindrical workpiece clamped in the workpiece holder can be rotated in a controlled manner by a predetermined angle about its longitudinal center axis, and a cutting tool which can be moved relative to the workpiece holder is thereby achieved.
  • the at least one tool is a grinding wheel
  • dressing means are provided for dressing a specific circumferential profile of the at least one grinding wheel, the circumferential profile of the The grinding wheel can be dressed in such a way that it corresponds to the profile of a complete tooth groove of the desired toothed belt toothing.
  • the device according to the invention can also be designed such that the dressing means comprise at least one dressing pin having a hard body on its tip facing the grinding wheel circumference, the hard body being movable relative to the associated grinding wheel both in the axial direction and in the radial direction with respect to the grinding wheel and by means of a programmable control unit is controllable.
  • the dressing pin moves with its hard body, e.g. a diamond along the circumference of the rotating grinding wheel.
  • its hard body e.g. a diamond along the circumference of the rotating grinding wheel.
  • the at least one dressing pin can additionally be pivoted about a dressing pivot axis which is perpendicular to the axial and radial direction and extends through the hard body.
  • the dressing swivel axis provides an additional variation option for the desired profile shapes.
  • the hard body has an arcuate cross-section, at least in the area provided for machining the workpiece. The dressing swivel axis then runs perpendicular to this cross section through the center point of the hard body relative to the circular arc radius.
  • the device according to the invention can also be designed 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 counter profile of at least part of the desired circumferential profile of the at least one grinding wheel.
  • This variant has the advantage that a complex CNC control is not required for the movement of the dressing means.
  • a profile dressing element is particularly useful when variations in the profile shape are not required.
  • the profile dressing element is a hard dressing body, for example made of diamond, with an edge-like dressing area.
  • the device according to the invention can also be designed such that the profile dressing element is a rotatable dressing roller with a rotationally symmetrical dressing area.
  • the grinding wheel is sufficiently stable to be able to achieve good removal with a high surface quality on the workpiece.
  • the grinding wheel material must still be so soft that the means used for dressing do not wear out.
  • the device according to the invention can also be designed in such a way that the at least one profile dressing element is positioned and adjustable relative to the workpiece holder in such a way that the projection of the profile of the dressing area on one end of the tool looks at the profile of the cross section of the tool in the direction of the longitudinal central axis of the at least one clamped tool corresponds to a desired cutting process.
  • Fig. 4 another grinding device with fixed profile diamonds
  • Fig. 5 a section of a profile diamond.
  • Fig. 1 shows a grinding device with a machine frame 1, on which a horizontally movable grinding table 2 is attached.
  • the grinding table 2 carries a workpiece holder 3, in which the cylindrical blank 4 for a toothed belt shape is clamped between a dividing device 16 and a counter bearing 17.
  • the blank 4 can be rotated in a controlled manner about a horizontal axis of rotation 7 by means of a turntable 5 via a rotary driver 5.
  • the axis of rotation 7 in the blank 4 simultaneously forms the longitudinal center axis of the blank 4.
  • the workpiece holder 3 comprises a high-precision direct measuring system, not shown separately here, which allows an exact adjustment of the angle of rotation.
  • a grinding wheel 9 is rotatably fixed to a grinding wheel holder 8.
  • the grinding wheel holder 8 can be moved in a highly precise manner in the vertical direction.
  • the counter profile of the toothed belt toothing has to be worked into 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 the die for the toothed belt toothing.
  • the grinding wheel 9 has a profile 10 on its circumference, which is visible in an enlarged view in FIG. 2.
  • the circumferential profile 10 corresponds to the grinding wheel 9 the desired profile of a tooth groove of the toothed belt shape.
  • the blank 4 is moved by means of the grinding table 2 with the grinding wheel 9 lowered so that the grinding wheel 9 cuts into the blank 4 the die for a complete tooth of the toothed belt over the entire length of the blank 4.
  • the blank 4 is then rotated by a predetermined angle ⁇ and the next tooth matrix is generated. With each grinding process, the outer diameter of the blank 4 is also ground, so that the entire lateral surface is ground in a finished toothed belt shape.
  • the peripheral profile 10 of the grinding wheel 9 is newly dressed with a dressing pin 11 before each grinding process. This is done with the help of a CNC controlled process.
  • the dressing pin 11 can be moved axially as well as in the radial direction with respect to the axis of rotation of the grinding wheel.
  • the dressing pin 11 also has a dressing pivot axis 12 which extends substantially perpendicular to the axial and radial direction 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.
  • Accuracies of up to +/- 0.01 mm can be achieved.
  • it can make sense to provide a variable feed speed of the dressing pin 11, so that e.g. in areas with small radii in circumferential profile 10, the feed rate is lower.
  • 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 profile course can be easily corrected without having to change the entire CNC programming.
  • the grinding wheel is constantly cleaned with the aid of a pair of spray nozzles 14 (FIG. 1) which reaches both flanks of the peripheral profile 10 with sufficient uniformity.
  • a further pair of spray nozzles 15 is used, which cleans the grinding wheel 9 at high pressure and thus prevents its clogging.
  • the pair of nozzles 15 is arranged in the immediate vicinity of the grinding slips 9.
  • Fig. 4 shows an alternative structure of a grinding device. Corresponding parts in different figures are provided with the same reference numbers.
  • the blank 4a is shorter in FIG. 4 than in FIG. 1.
  • the tool holder 3 has the same distance in its sub-assemblies 16 and 17 as in FIG. 1.
  • a length adapter 18 provided with struts 20 is provided. With the aid of one or more length adapters 18, even with different lengths of blanks 4a, it is possible to avoid adjusting the sub-assemblies 16 and 17 of the workpiece holder 3 in order to maintain a high exactness in the distance, which has been achieved with great effort.
  • a profile diamond 19 is arranged, which is used for dressing the grinding wheel 9 and is shown enlarged in Fig.5.
  • the profile diamond 19 has a dressing edge 21, the profile of which corresponds to the profile of the desired tooth groove of the toothed belt shape.
  • the profile diamond 19 is aligned in such a way that, by a further movement of the grinding table 2, the grinding wheel 9 reaches the workpiece 4a in the correct working position without a vertical change in position and produces the die for a complete tooth of the toothed belt including the tooth base in a single grinding process.
  • the grinding wheel holder 8 is raised and the grinding table 2 is moved back to the starting position.
  • the grinding wheel holder 8 is lowered again, but because of the wear given during the grinding process, it is a small distance further than before the previous pass. In this way, the circumference of the grinding wheel 9 is newly dressed before each grinding.
  • the position of the profile diamond 19 can be changed in the vertical direction so that any wear and tear can be compensated for or an adaptation to different workpiece diameters is possible.
  • Machine frame 2. Grinding table 3. Workpiece holder

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)
  • Seal Device For Vehicle (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (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

Verfahren und Vorrichtung zur Herstellung von ZahnriemenformenMethod and device for producing toothed belt molds
Beschreibungdescription
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Herstellung von Zahnriemenformen.The invention relates to a method and a device 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 shapes are usually tubular steel rollers, which are straight-toothed on their circumference and as the inner core in the production of timing belts, e.g. made of Perbunan rubber or plastic. 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 matrix of the toothed belt toothing.
Es ist bekannt, Zahnriemenformen durch Fräsen aus zylinderförmigen Rohlingen her- zustellen. 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 toothed belt shapes by milling from cylindrical blanks. The requirements for the exactness of the tooth geometry of timing belts have increased enormously. So the tooth surface should be as smooth as possible, i.e. if possible, do not have any images of the milling grooves in the toothed belt shapes. When milling toothed belt molds, it is therefore usually necessary to re-treat the surface of the toothed belt mold.
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 und 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 to provide a method and a device of the type mentioned at the outset, with which, in addition to high geometric precision, high surface quality of the toothed belt shape is made possible.
Diese Aufgabe wird bei einem Verfahren, bei dem mittels eines spangebenden Werkzeugs in den vor der Bearbeitung im Wesentlichen zylinderförmigen Umfang eines Werkstücks eine Matrize der gewünschten Zahnriemenverzahnung oder die gewünschte Zahnradverzahnung eingearbeitet wird, dadurch gelöst, dass als spangebendes Werkzeug mindestens eine rotierende Schleifscheibe mit einem profilierten Umfang eingesetzt wird, wobei das Umfangsprofil dem Profil einer vollständigen Zahnnut der gewünschten Zahnriemenform entspricht.This object is achieved in a method in which a die of the desired toothed belt toothing or the desired toothed wheel toothing is worked into the essentially cylindrical circumference of a workpiece by means of a cutting tool, in that at least one rotating grinding wheel with a profiled profile is used as the cutting tool scope is used, the circumferential profile corresponding to the profile of a complete tooth groove of the desired toothed belt shape.
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.The matrix for the toothed belt is therefore not milled, but is created by grinding with specially profiled grinding wheels with a grinding movement parallel to the longitudinal center axis of the workpiece. In this way, a quality of the surface of the finished workpiece can be achieved, which eliminates the need for post-treatment. The tooth groove is understood to mean the complete area from the head of one tooth to the head of the adjacent tooth. The grinding of two adjacent tooth grooves thus leads to the generation of a complete tooth of the toothed belt shape, i.e. H. the outer diameter of the toothed belt shape is also ground. For the geometry of the tooth groove of the toothed belt shape, the shrinkage of the toothed belt material during cooling in the manufacturing process must be taken into account.
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, e.g. B. a wavy sub-profile in the area of the tooth flanks. For this, e.g. B. channels parallel to the toothed belt axis are introduced into the profile. Timing belts with such sub-profiles are disclosed in DE 199 08 672 C1.
Das erfindungsgemäße Verfahren kann auch so ausgeführt werden, dass das Umfangsprofil der Schleifscheibe mittels eines CNC-gesteuerten Abrichtstiftes hergestellt und/oder abgerichtet wird. Der Abrichtvorgang ist aufgrund der allmählichen Abnutzung der Schleifscheibe erforderlich. Die CNC-Steuerung ermöglicht es, nahezu beliebige und hochgenaue Profile in den Umfang der Schleifscheibe einzuarbeiten und abzurichten und somit auf relativ einfache Weise variierende Verzahnungsgeometrien erzeugen zu können.The method according to the invention can also be carried out in such a way that the peripheral profile of the grinding wheel is produced and / or dressed using a CNC-controlled dressing pin. The dressing process is necessary due to the gradual wear of the grinding wheel. The CNC control makes it possible to incorporate and dress almost any high-precision profiles in the circumference of the grinding wheel and thus to be able to produce varying tooth geometries in a relatively simple manner.
Das erfindungsgemäße Verfahren kann auch so ausgeführt werden, dass das Um- fangsprofil an einem Profilabrichtelement mit einem profilierten 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 insbeson- dere dann vorteilhaft sein, wenn hohe Stückzahlen mit identischen Verzahnungsgeometrien herzustellen sind.The method according to the invention can also be carried out in such a way that the circumferential profile is produced and / or dressed on a profile dressing element with a profiled dressing area. This eliminates the need for a CNC control for dressing, since the profiled dressing area specifies a fixed profile. This can in particular This can be advantageous if large quantities with identical gear geometries are to be produced.
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 Ab- richterbereich können durch eine manuelle oder auch automatisierte Justage kompensiert werden.Finally, the method according to the invention can also be carried out in such a way that the dressing of the rotating grinding wheel and the subsequent grinding of the workpiece takes place in a single straight-line translatory movement of the grinding wheel relative to the workpiece. This can be achieved by suitable positioning of the profile dressing element. Once the profile dressing element has been positioned and adjusted with high precision relative to the workpiece, the profile profile of the dressing area of the dressing element specifies the cutting profile exactly for each grinding operation, i.e. the dressing area must lie exactly in line with the desired cutting profile. After the geometry of a tooth groove has been ground into the workpiece, the workpiece is rotated through an angle corresponding to the pitch circle division of the tooth geometry. The grinding wheel is guided over the dressing area of the dressing element for further dressing and in continuation of a straight-line translational movement for the next grinding process to the workpiece. Based on the assumption that the dressing area has not been significantly worn, the grinding wheel is always at the correct relative height relative to the workpiece after dressing. Any wear and tear on the dressing area can be compensated for by 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 achieved by moving the grinding wheel in relation to a machine frame or by moving a tool holder.
Die vorgenannte Aufgabe wird bei einer Vorrichtung, umfassend eine Werkstückhalterung, Drehmittel, mit denen mindestens ein in der Werkstückhalterung eingespanntes, im wesentlichen zylindrisches Werkstück um vorgegebene Winkel um seine Längsmit- telachse kontrolliert drehbar ist, und ein relativ zur Werkstückhalterung verfahrbares spangebendes Werkzeug dadurch gelöst, dass das mindestens eine Werkzeug eine Schleifscheibe ist, und dass 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 Zahnriemenverzahnung entspricht.The aforementioned object is achieved in a device comprising a workpiece holder, rotating means with which at least one essentially cylindrical workpiece clamped in the workpiece holder can be rotated in a controlled manner by a predetermined angle about its longitudinal center axis, and a cutting tool which can be moved relative to the workpiece holder is thereby achieved. that the at least one tool is a grinding wheel, and that dressing means are provided for dressing a specific circumferential profile of the at least one grinding wheel, the circumferential profile of the The grinding wheel can be dressed in such a way that it corresponds to the profile of a complete tooth groove of the desired toothed belt toothing.
Die erfindungsgemäße Vorrichtung kann auch so ausgebildet sein, dass die Abrichtmittel mindestens einen an seiner dem Schleifscheibenumfang zugewandten Spitze einen Hartkörper aufweisenden Abrichtstift umfassen, wobei der Hartkörper relativ zur zugehörigen Schleifscheibe sowohl in auf die Schleifscheibe bezogen axialer Richtung als auch in radialer Richtung verfahrbar und mittels einer programmierbaren Steuereinheit steuerbar ist.The device according to the invention can also be designed such that the dressing means comprise at least one dressing pin having a hard body on its tip facing the grinding wheel circumference, the hard body being movable relative to the associated grinding wheel both in the axial direction and in the radial direction with respect to the grinding wheel and by means of a programmable control unit is controllable.
Zum Abrichten fährt der Abrichtstift mit seinem Hartkörper, z.B. einem Diamanten, am Umfang der rotierenden Schleifscheibe entlang. Mit einer CNC-Steuerung können nahezu beliebige Profilformen erzeugt werden.For dressing, the dressing pin moves with its hard body, e.g. a diamond along the circumference of the rotating grinding wheel. With a CNC control, almost any profile shape can be created.
Weiterhin kann es vorteilhaft sein, die erfindungsgemäße Vorrichtung so auszubilden, dass der mindestens eine Abrichtstift zusätzlich um eine zur axialen und radialen Richtung senkrechten, durch den Hartkörper verlaufende Abrichtschwenkachse schwenkbar ist. Die Abrichtschwenkachse gibt eine zusätzliche Variationsmöglichkeit für die gewünschten Profilformen. In der Regel weist der Hartkörper zumindest in seinem zur Be- arbeitung des Werkstücks vorgesehenen Bereich einen kreisbogenförmigen Querschnitt auf. Die Abrichtschwenkachse verläuft dann senkrecht zu diesem Querschnitt durch den auf den Kreisbogenradius bezogenen Mittelpunkt des Hartkörpers.Furthermore, it can be advantageous to design the device according to the invention in such a way that the at least one dressing pin can additionally be pivoted about a dressing pivot axis which is perpendicular to the axial and radial direction and extends through the hard body. The dressing swivel axis provides an additional variation option for the desired profile shapes. As a rule, the hard body has an arcuate cross-section, at least in the area provided for machining the workpiece. The dressing swivel axis then runs perpendicular to this cross section through the center point of the hard body relative to the circular arc radius.
Die erfindungsgemäße Vorrichtung kann auch so ausgebildet sein, dass die Abricht- mittel 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.The device according to the invention can also be designed 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 counter profile of at least part of the desired circumferential profile of the at least one grinding wheel.
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 Profilform nicht benötigt werden. Weiterhin kann es vorteilhaft sein, die erfindungsgemäße Vorrichtung so auszubilden, dass das Profilabrichtelement ein Abrichthartkörper, beispielsweise aus Diamant, mit einem kantenartigen Abrichterbereich ist.This variant has the advantage that a complex CNC control is not required for the movement of the dressing means. A profile dressing element is particularly useful when variations in the profile shape are not required. Furthermore, it can be advantageous to design the device according to the invention such that the profile dressing element is a hard dressing body, for example made of diamond, with an edge-like dressing area.
Die erfindungsgemäße Vorrichtung kann aber auch so ausgebildet sein, dass das Profilabrichtelement eine rotierbare Abrichtrolle mit einem rotationssymmetrischen Abrichterbereich ist.However, the device according to the invention can also be designed such that the profile dressing element is a rotatable dressing roller with a rotationally symmetrical dressing area.
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 apply that on the one hand the grinding wheel is sufficiently stable to be able to achieve good removal with a high surface quality on the workpiece. On the other hand, the grinding wheel material must still be so soft that the means used for dressing do not wear out.
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 in such a way that the at least one profile dressing element is positioned and adjustable relative to the workpiece holder in such a way that the projection of the profile of the dressing area on one end of the tool looks at the profile of the cross section of the tool in the direction of the longitudinal central axis of the at least one clamped tool corresponds to a desired cutting process.
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. Im Folgenden wird die Erfindung anhand von Figuren erläutert.With such an arrangement, it is possible to first guide the rotating grinding wheel along the hard profile body with a single straight-line translational movement, thereby achieving the desired alignment of the peripheral profile of the grinding wheel and then carrying out the grinding process on the workpiece. An adjustment of the grinding wheel towards the longitudinal center axis of the workpiece in the radial direction is therefore no longer necessary for the grinding process. In addition, it is completely irrelevant how much was removed from the diameter of the grinding wheel during the dressing process, since the dressing edge profile or the profile of the profile roller lies precisely in the alignment of the cut desired in the grinding process. The invention is explained below with reference to figures.
Es zeigt schematischIt shows schematically
Fig. 1: eine Schleifvorrichtung in Seitenansicht,1: a grinding device in side view,
Fig. 2: ausschnittsweise eine Schleifscheibe und eine Zahnriemenform während des Schleifvorgangs,2: a section of a grinding wheel and a toothed belt shape during the grinding process,
Fig. 3: ausschnittsweise eine Schleifscheibe während des Abrichtens,3: a section of a grinding wheel during dressing,
Fig. 4: eine weitere Schleifvorrichtung mit feststehendem Profildiamanten, undFig. 4: another grinding device with fixed profile diamonds, and
Fig.5: ausschnittsweise einen Profildiamanten.Fig. 5: a section of 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 nun- mehr 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 attached. The grinding table 2 carries a workpiece holder 3, in which the cylindrical blank 4 for a toothed belt shape is clamped between a dividing device 16 and a counter bearing 17. The blank 4 can be rotated in a controlled manner about a horizontal axis of rotation 7 by means of a turntable 5 via a rotary driver 5. The axis of rotation 7 in the blank 4 simultaneously forms the longitudinal center axis of the blank 4. The workpiece holder 3 comprises a high-precision direct measuring system, not shown separately here, which allows an exact adjustment of the angle of rotation. Above the workpiece holder 3, a grinding wheel 9 is rotatably fixed to a grinding wheel holder 8. The grinding wheel holder 8 can be moved in a highly precise manner in the vertical direction. In order to obtain a toothed belt shape from the blank 4, the counter profile of the toothed belt toothing has to be worked into the circumference of the blank 4, the toothing being rectilinear and constant in the direction of the longitudinal central axis of the blank 4. When viewed in cross-section, the circumference now forms 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 a profile 10 on its circumference, which is visible in an enlarged view in FIG. 2. The circumferential profile 10 corresponds to the grinding wheel 9 the desired profile of a tooth groove of the toothed belt shape. For the production of the toothed belt shape, the blank 4 is moved by means of the grinding table 2 with the grinding wheel 9 lowered so that the grinding wheel 9 cuts into the blank 4 the die for a complete tooth of the toothed belt over the entire length of the blank 4. The blank 4 is then rotated by a predetermined angle α and the next tooth matrix is generated. With each grinding process, the outer diameter of the blank 4 is also ground, so that the entire lateral surface is ground in a finished toothed belt shape.
Da die Schleifscheibe 9 bei zunehmendem Einsatz abnutzt, wird das Umfangsprofil 10 der Schleifscheibe 9 mit einem Abrichtstift 11 vor jedem Schleifvorgang neu abgerichtet. 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 kon- stante 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 peripheral profile 10 of the grinding wheel 9 is newly dressed with a dressing pin 11 before each grinding process. This is done with the help of a CNC controlled process. The dressing pin 11 can be moved axially as well as in the radial direction with respect to the axis of rotation of the grinding wheel. In addition, the dressing pin 11 also has a dressing pivot axis 12 which extends substantially perpendicular to the axial and radial direction 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 into the peripheral profile 10. Accuracies of up to +/- 0.01 mm can be achieved. In order to be able to achieve this accuracy, it can make sense to provide a variable feed speed of the dressing pin 11, so that e.g. in areas with small radii in circumferential profile 10, the feed rate is lower. 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 profile course can be easily corrected without having to change the entire CNC programming.
Für den Abrichtvorgang wird die Schleifscheibe ständig mit Hilfe eines Spritz-Düsen- paares 14 (Fig.1) gereinigt, das beide Flanken des Umfangprofils 10 hinreichend gleichmäßig erreicht. 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.For the dressing process, the grinding wheel is constantly cleaned with the aid of a pair of spray nozzles 14 (FIG. 1) which reaches both flanks of the peripheral profile 10 with sufficient uniformity. During the grinding process, a further pair of spray nozzles 15 is used, which cleans the grinding wheel 9 at high pressure and thus prevents its clogging. The pair of nozzles 15 is arranged in the immediate vicinity of the grinding slips 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.In order to make the overall process economical, it can 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 Ver- stellen 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 structure of a grinding device. Corresponding parts in different figures are provided with the same reference numbers. The blank 4a is shorter in FIG. 4 than in FIG. 1. The tool holder 3 has the same distance in its sub-assemblies 16 and 17 as in FIG. 1. However, a length adapter 18 provided with struts 20 is provided. With the aid of one or more length adapters 18, even with different lengths of blanks 4a, it is possible to avoid adjusting the sub-assemblies 16 and 17 of the workpiece holder 3 in order to maintain a high exactness in the distance, which has been achieved with great effort.
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 is used for dressing the grinding wheel 9 and is shown enlarged in Fig.5. The profile diamond 19 has a dressing edge 21, the profile of which corresponds to the profile of the desired tooth groove of the toothed belt shape. Before a grinding process, the grinding table 2 is brought into a starting position in which the grinding wheel 9 is positioned to the left of the profile diamond 19 in FIG. 4. The grinding wheel holder 8 is then lowered to such an extent that when the grinding table 2 is moved to the left (in FIG. 4), the outer circumference of the rotating grinding wheel 9 is provided with the corresponding counter profile by the dressing edge 21 of the profile diamond 9. The outer circumference of the grinding wheel 9 thus has the profile of a complete tooth groove of the desired toothed 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. Hier- nach 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 kom- plette Umfang der Zahnriemenform inklusive Außendurchmesser mit der Schleifscheibe 9 geschliffen.The profile diamond 19 is aligned in such a way that, by a further movement of the grinding table 2, the grinding wheel 9 reaches the workpiece 4a in the correct working position without a vertical change in position and produces the die for a complete tooth of the toothed belt including the tooth base in a single grinding process. Here- After the grinding wheel holder 8 is raised and the grinding table 2 is moved back to the starting position. The grinding wheel holder 8 is lowered again, but because of the wear given during the grinding process, it is a small distance further than before the previous pass. In this way, the circumference of the grinding wheel 9 is newly 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 that the matrices of the toothed belt teeth ground into the workpiece 4a are exactly the same in terms of tooth geometry and tooth height. In this way, the entire circumference of the toothed belt shape, including the outer diameter, is 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 Anpas- sung an unterschiedliche Werkstückdurchmesser möglich ist. The position of the profile diamond 19 can be changed in the vertical direction so that any wear and tear can be compensated for or an adaptation to different workpiece diameters is possible.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1. Maschinengestell 2. Schleiftisch 3. Werkstückhalterung1. Machine frame 2. Grinding table 3. Workpiece holder
4. Rohling4. Blank
5. Drehmitnehmer5. Rotary driver
6. Drehteller6. Turntable
7. Drehachse 8. Schleifscheibenhalterung7. Axis of rotation 8. Grinding wheel holder
9. Schleifscheibe9. Grinding wheel
10. Umfangsprofil10. Circumference profile
11. Abrichtstift11. Dressing pin
12. Abrichtschwenkachse 13. Diamant12. Dressing swivel axis 13. Diamond
14. Spritzdüsenpaar14. Pair of spray nozzles
15. Düse15. Nozzle
16. Teilapparat16. Dividing head
17. Gegenstück 18. Längenadapter17. Counterpart 18. Length adapter
19. Profildiamant19. Profile diamond
20. Strebe20. Strive
21. Abrichtkante 21. Dressing edge

Claims

Ansprüche Expectations
1. Verfahren zur Herstellung von Zahnriemenformen, bei dem mittels eines spangebenden Werkzeugs in den vor der Bearbeitung im Wesentlichen zylinderförmigen Umfang eines Werkstücks eine Matrize der gewünschten Zahnriemenverzahnung eingearbeitet wird, dadurch gekennzeichnet, dass als spangebendes Werkzeug mindestens eine rotierende Schleifscheibe (9) mit einem profilierten Umfang eingesetzt wird, wobei das Umfangsprofil (10) dem Profil einer voll- ständigen Zahnnut der gewünschten Zahnriemenform entspricht1. A method for producing toothed belt molds, in which a die of the desired toothed belt toothing is incorporated into the essentially cylindrical circumference of a workpiece by means of a cutting tool, characterized in that at least one rotating grinding wheel (9) with a profiled shape is used as the cutting tool Circumference is used, the circumferential profile (10) corresponding to the profile of a complete tooth groove of the desired toothed belt shape
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass das Umfangsprofil (10) der Schleifscheibe (9) mittels eines CNC-gesteuerten Abrichtstiftes (11) hergestellt und/oder abgerichtet wird.2. The method according to claim 1, characterized in that the peripheral profile (10) of the grinding wheel (9) is produced and / or dressed by means of a CNC-controlled dressing pin (11).
3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Umfangsprofil an einem Profilabrichtelement (19) mit einem profilierten Abrichterbereich (21) hergestellt und/oder abgerichtet wird.3. The method according to claim 1, characterized in that the peripheral profile is produced and / or dressed on a profile dressing element (19) with a profiled dressing area (21).
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass das Abrichten der rotierenden Schleifscheibe (9) und das anschließende Schleifen des Werkstückes (4,4a) in einer einzigen geradlinigen translatorischen Bewegung der Schleifscheibe (9) relativ zum Werkstück (4,4a) erfolgt.4. The method according to claim 3, characterized in that the dressing of the rotating grinding wheel (9) and the subsequent grinding of the workpiece (4,4a) takes place in a single linear translatory movement of the grinding wheel (9) relative to the workpiece (4,4a) ,
5. 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, dadurch gekennzeichnet, d) dass das mindestens eine Werkzeug eine Schleifscheibe (9) ist, und e) dass 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.5. Device for producing toothed belt molds, comprising a) a workpiece holder (3), b) rotating means (6,5) with which at least one, essentially cylindrical workpiece (4,4a) clamped in the workpiece holder (3) by predetermined angles can be rotated in a controlled manner about its longitudinal center axis, and c) a cutting tool that can be moved relative to the workpiece holder (3), characterized in that d) the at least one tool is a grinding wheel (9), and e) that dressing means are provided for dressing a certain circumferential profile (10) of the at least one grinding wheel (9), the circumferential profile (10) of the grinding wheel (9) being dressable in such a way that it corresponds to the profile of a complete tooth groove of the desired toothed belt shape.
6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Abrichtmittel mindestens einen an seiner dem Schleifscheibenumfang zugewandten Spitze einen Hartkörper (13) aufweisenden Abrichtstift (11) umfassen, wobei der Hartkörper (13) relativ zur zugehörigen Schleifscheibe (9) sowohl in auf die Schleifscheibe (9) be- zogen axialer Richtung als auch in radialer Richtung verfahrbar und mittels einer programmierbaren Steuereinheit steuerbar ist.6. The device according to claim 5, characterized in that the dressing means comprise at least one hard body (13) having a dressing pin (11) on its tip facing the grinding wheel circumference, the hard body (13) relative to the associated grinding wheel (9) both in on The grinding wheel (9) can be moved in the axial direction as well as in the radial direction and can be controlled by means of a programmable control unit.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass der mindestens eine Abrichtstift (11) zusätzlich um eine zur axialen und radialen Richtung senkrechten, durch den Hartkörper (13) verlaufende Abrichtschwenkachse (12) schwenkbar ist.7. The device according to claim 6, characterized in that the at least one dressing pin (11) is additionally pivotable about a dressing pivot axis (12) extending perpendicular to the axial and radial direction and through the hard body (13).
8. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass 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.8. The device according to claim 5, characterized in that 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 counter profile of at least part of the desired peripheral profile of the at least one grinding wheel ( 9) is.
9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass das Profilab- richtelement (19) ein Abrichthartkörper, beispielsweise aus Diamant, mit einem kantenartigen Abrichterbereich ist.9. The device according to claim 8, characterized in that the profile dressing element (19) is a hard dressing body, for example made of diamond, with an edge-like dressing area.
10. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass das Profilabrichtelement eine rotierbare Abrichtrolle mit einem rotationssymmetrischen Abrichterbe- reich ist.10. The device according to claim 8, characterized in that the profile dressing element is a rotatable dressing roller with a rotationally symmetrical dressing area.
11. Vorrichtung nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass das mindestens eine Profilabrichtelement relativ zum Werkstückhalter derart posi- tioniert 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. 11. The device according to one of claims 8 to 10, characterized in that the at least one profile dressing element is positioned relative to the workpiece holder in such a manner. is tioned and adjustable that viewed in the direction of the longitudinal central axis of the at least one clamped tool, the projection of the profile of the dressing area on one end of the tool corresponds to the profile of the cross section of the cut desired in a grinding process.
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
EP05007364A EP1568441B1 (en) 2000-11-28 2001-11-28 Device for the production of toothed belt forms
SI200130403T SI1339527T2 (en) 2000-11-28 2001-11-28 Method for producing molds for toothed belts

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

Publications (3)

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

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EP05007364A Expired - Lifetime EP1568441B1 (en) 2000-11-28 2001-11-28 Device for the production of toothed belt forms
EP01995545A Expired - Lifetime EP1339527B2 (en) 2000-11-28 2001-11-28 Method for producing molds for toothed belts

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EP05007364A Expired - Lifetime EP1568441B1 (en) 2000-11-28 2001-11-28 Device for the production of toothed belt forms

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US (1) US7125316B2 (en)
EP (2) EP1568441B1 (en)
JP (1) JP2004524169A (en)
KR (1) KR100783206B1 (en)
CN (1) CN1216721C (en)
AT (2) ATE296711T1 (en)
AU (1) AU2002226281A1 (en)
BR (1) BR0115685A (en)
DE (3) DE10059067A1 (en)
ES (2) ES2291996T3 (en)
MX (1) MXPA03004648A (en)
PL (1) PL201008B1 (en)
PT (2) PT1339527E (en)
SI (2) SI1339527T2 (en)
WO (1) WO2002043919A1 (en)

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Also Published As

Publication number Publication date
ATE369939T1 (en) 2007-09-15
US7125316B2 (en) 2006-10-24
PT1568441E (en) 2007-11-13
DE10059067A1 (en) 2002-06-06
SI1339527T2 (en) 2011-06-30
MXPA03004648A (en) 2004-10-14
SI1339527T1 (en) 2005-12-31
EP1339527B2 (en) 2011-04-27
JP2004524169A (en) 2004-08-12
EP1339527B1 (en) 2005-06-01
US20040029497A1 (en) 2004-02-12
PL366126A1 (en) 2005-01-24
ES2291996T3 (en) 2008-03-01
SI1568441T1 (en) 2008-02-29
PT1339527E (en) 2005-11-30
ATE296711T1 (en) 2005-06-15
AU2002226281A1 (en) 2002-06-11
EP1568441A1 (en) 2005-08-31
KR20040028687A (en) 2004-04-03
DE50106409D1 (en) 2005-07-07
BR0115685A (en) 2003-09-09
ES2243593T3 (en) 2005-12-01
PL201008B1 (en) 2009-02-27
WO2002043919A1 (en) 2002-06-06
EP1568441B1 (en) 2007-08-15
CN1216721C (en) 2005-08-31
ES2243593T5 (en) 2011-08-30
KR100783206B1 (en) 2007-12-06
DE50112885D1 (en) 2007-09-27
CN1501851A (en) 2004-06-02

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