EP0489708B1 - Grinding device - Google Patents

Grinding device Download PDF

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Publication number
EP0489708B1
EP0489708B1 EP19910890297 EP91890297A EP0489708B1 EP 0489708 B1 EP0489708 B1 EP 0489708B1 EP 19910890297 EP19910890297 EP 19910890297 EP 91890297 A EP91890297 A EP 91890297A EP 0489708 B1 EP0489708 B1 EP 0489708B1
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EP
European Patent Office
Prior art keywords
tool
copying
spindle
templates
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP19910890297
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German (de)
French (fr)
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EP0489708A1 (en
Inventor
Konrad Trausnigg
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" Neuson" -Olfeldschieber GmbH
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" Neuson" -Olfeldschieber GmbH
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/24Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B17/00Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor
    • B24B17/02Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor involving mechanical transmission means only
    • B24B17/023Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor involving mechanical transmission means only using two or more templates

Definitions

  • the invention relates to a device according to the preamble of patent claim 1.
  • Such a device is known from FR-A 1 323 954.
  • spiral tools is understood to mean single and multi-stage center drills, twist drills, spiral countersinks, taps, cannon drills, step, radius and shape milling cutters, ball countersinks, hole countersinks, tenon countersinks, quarter-round cutters, gravers, etc., in which the spiral grooves or The like. Left or right can be provided.
  • a device according to the preamble of claim 1 is known from FR-A-1323954.
  • the cross slide is mounted on a turntable and can be rotated with the turntable.
  • a geared motor is used to drive the tool spindle, which is connected to the tool spindle via a V-belt drive.
  • Only a single template is provided, which is attached to the tool spindle in a rotationally fixed manner.
  • a roller seated on a swivel lever is used to scan the template, the swivel lever with a second lever arm transmitting the scanning movement to a further swivel lever of a copying unit via interposed ball elements.
  • the translation ratios in the two coordinate directions are set according to tables, dial gauges being provided for each of the two coordinate directions to facilitate the setting.
  • the copying units are mounted separately from each other, with the copying unit serving for length adjustment below the tool spindle and the second copying unit at a distance from it as a separate component is mounted transversely to the tool spindle.
  • the object of the invention is to provide a device of the type mentioned which, with a simple design and easier operability, in particular without special tools, enables exact positioning of the tools enables during the grinding process, with re-clamping processes to be avoided during the machining process even with complicated step tools, a quick and easy change to other templates is possible and the reworking of the machining point on the grinding tool is simplified during regrinding.
  • the device according to the invention has a simple compact overall structure in which all essential parts are protected in the housing.
  • a particular advantage is that the coupling provided in the course of the tool spindle, which can be engaged in any relative rotational position of its two halves, allows the tool to be adjusted relative to the grinding tool in the disengaged state, which means, among other things, the positioning when regrinding step tools and their flutes do not merge exactly, it is much easier.
  • the spindle is disengaged or the copying units are set to a zero ratio, concentric cylinder and cone surfaces can be ground on the tool.
  • fine drives with associated display devices or fine drives with servomotors can be provided, which can be designed as programmable stepper motors, so that any desired transmission ratio can be set quickly and reproducibly.
  • the adjustable driver can be realized in the manner specified in claim 4.
  • undercuts including counter-undercuts
  • both axial and radial undercuts being possible and when grinding twist drill tips and similar processes it is also possible to carry out a feed movement in one coordinate direction and one in the other coordinate direction To generate push-back movement.
  • a cross slide guide 2, 3 On a turn at least in two coordinate directions with respect to the grinding tool or tools of a grinding machine via feed devices adjustable rotary table 1, a cross slide guide 2, 3 is attached, on which a housing 4 is held "floating" adjustable against biasing springs, so that the housing 4 adjustment movements in the two Coordinate directions 5, 6, rotary movements according to the arrow 7 with the turntable and pivoting movements can be carried out at differently adjusted support points in the two coordinate directions and thus the setting of a tool spindle 8 mounted in the housing 4 in the various positions mentioned for setting relief-ground surfaces on one of the spindle 8 carried tool 9, which in the embodiment consists of a step twist drill in which the tip 10, the minor cutting edges on the flutes 11, 12 and the end cutting edge 13 between the two drill stages 14, 15 to h are intercut.
  • the drill 9 engages with its shaft 16 in a known manner in an interchangeable holder (holding cone) 17 of the left spindle part 18, which is connected to the part 19 of the spindle 8 shown on the right in FIG. 2 via a clutch 20 which can be engaged and disengaged both coupling halves 21, 22 can be engaged in any rotational position.
  • the right part 19 of the spindle 8 located within the housing 4 can be designed as a spline shaft.
  • a set of several individual templates 23 is attached to it in a longitudinally displaceable manner, the template 23a matching the outline shape of the tool 9 just clamped in is fixed axially in a working position using known means.
  • the tool spindle 8 is rotatably mounted in the housing with rotary bearings, not shown.
  • An end 24 of the spindle 8 led out of the housing 4 on the right is connected to a geared motor 25 designed as a servomotor. With the help of which the spindle 8 is driven in a controlled rotating manner.
  • a template 23a which has an outline shape adapted to the cross-sectional shape of the two drill steps 14, 15.
  • the template 23a is engaged by a sensing pin 26 of a copying rod 27 which is longitudinally displaceably guided by means not shown in the housing 4, which copying rod performs a stroke resulting from the scanning of the template 23a.
  • the copying rod 27 is connected via a joint 28 directly to one end of a two-armed pivoting lever with arms 29, 30 arranged transversely to it and via a diagonal lever 31 to the other end 32 of a pivoting lever with the arms arranged in its basic position parallel to the front housing wall 33 34, 35 connected.
  • the two swivel levers 29, 30 and 34, 35 can be pivoted about axes 36, 37 which are guided out of the housing 4 and are fixedly attached to the turntable 1. In the rest position of the lever 29, 30 it runs approximately parallel to a wall 38 of the housing.
  • a roller 41, 42 bridging the gap by its thickness which can also be referred to as drivers or transfer rollers, is adjustably attached over the lever length.
  • these rollers parallel to the walls 33, 38 arranged by hand or via servomotors, not shown fine drives, threaded spindles and the like.
  • fine drives, threaded spindles and the like Like. Be provided.
  • the drivers (transfer rollers) 41, 42 In the rest position shown The drivers (transfer rollers) 41, 42 in no way hinder a pivoting movement of the levers 29, 30 or 34, 35 generated by scanning the template 23a via the copying rod 27.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Description

Die Erfindung betrifft eine Vorrichtung nach dem Oberbegriff des Patentanspruches 1.The invention relates to a device according to the preamble of patent claim 1.

Eine derartige Vorrichtung ist aus der FR-A 1 323 954 bekannt.Such a device is known from FR-A 1 323 954.

Unter dem Ausdruck "Spiralwerkzeuge" werden in der Folge ein- und mehrstufige Zentrierbohrer, Spiralbohrer, Spiralsenker, Gewindebohrer, Kanonenbohrer, Stufen-, Radius- und Formfräser, Kugelsenker, Lochsenker, Zapfensenker, Viertelkreisfräser, Stichel usw. verstanden, bei denen die Spiralnuten od. dgl. links- oder rechtsdrehend vorgesehen sein können.The term "spiral tools" is understood to mean single and multi-stage center drills, twist drills, spiral countersinks, taps, cannon drills, step, radius and shape milling cutters, ball countersinks, hole countersinks, tenon countersinks, quarter-round cutters, gravers, etc., in which the spiral grooves or The like. Left or right can be provided.

Bei der Herstellung derartiger Werkzeuge ergeben sich Einstellprobleme für das Schleifen von Hinterschneidungen oder, allgemein aller Flächen, die nicht genau radial zur Werkzeugachse verlaufen bzw. keine Rotationsflächen um die Werkzeugachse bilden. Für das Schleifen solcher Flächen, z. B. der Freiflächen an den Haupt- und Nebenschneiden von Spiralbohrern sowie der Freiflächen an der Stufe von Stufenbohrern und der entsprechenden, die Freifläche zur Schneide ergänzenden Gegenflächen, muß die Werkzeugachse exzentrisch und schräg eingestellt werden. Bei der Serienfertigung sind solche Einstellungen verhältnismäßig einfach, da sie für alle Werkzeuge einer Herstellungsserie gleich bleiben. Unangenehm und aufwendig werden die notwendigen Einstellungen bei der Einzelanfertigung von Sonderwerkzeugen und bei der Nachschärfung vorhandener Werkzeuge.In the manufacture of such tools, there are adjustment problems for the grinding of undercuts or, generally, all surfaces that do not run exactly radially to the tool axis or do not form any surfaces of revolution around the tool axis. For grinding such surfaces, e.g. B. the free areas on the main and secondary cutting edges of twist drills and the free areas on the step of step drills and the corresponding counter surfaces that complement the free area to the cutting edge, the tool axis must be set eccentrically and at an angle. Such settings are relatively simple in series production, since they remain the same for all tools in a production series. The necessary settings for the individual production of special tools and for the re-sharpening of existing tools become uncomfortable and complex.

Hier kann es bei komplizierteren Werkzeugen, beispielsweise bei Stufenbohrern notwendig werden, das Werkzeug während der Gesamtbearbeitung mehrfach aus- und umzuspannen, was nicht nur die Standzeiten der Schleifmaschinen erhöht, sondern auch den prinzipiellen Nachteil hat, daß beim Umspannen Achsabweichungen des Werkzeuges gegenüber der Werkzeugspindel in Bezug auf die vorhergehende Einspannung auftreten können, so daß dann die bei den verschiedenen Einspannungen bearbeiteten Flächen zu den vorher bearbeiteten Flächen z. B. nicht mehr exakt konzentrisch sind, so daß das Werkzeug nicht einwandfrei arbeitet. Besonders bei für Sonderzwecke eingesetzten Werkzeugen kann es vorkommen, daß, abhängig von dem mit dem Werkzeug zu bearbeitenden Material die günstigsten Winkel für die Schneiden bestimmenden Flächen und die Freiflächen erst empirisch ermittelt werden müssen, wobei sich die oben beschriebenen Einstellschwierigkeiten bei jedem neuen Versuch einstellen.In the case of more complicated tools, for example step drills, it may be necessary to unclamp and reclamp the tool several times during the entire machining process, which not only increases the service life of the grinding machines, but also has the fundamental disadvantage that axis deviations of the tool compared to the tool spindle in Reference to the previous clamping can occur, so that then the surfaces machined at the various clamps to the previously machined surfaces z. B. are no longer exactly concentric, so that the tool does not work properly. Particularly for tools used for special purposes, it can happen that, depending on the material to be machined with the tool, the most favorable angles for the surfaces determining the cutting edges and the free surfaces must first be determined empirically, the adjustment difficulties described above occurring with each new attempt.

Eine Vorrichtung gemäß oberbegriff des Anspruchs 1 ist aus der FR-A-1323954 bekannt.A device according to the preamble of claim 1 is known from FR-A-1323954.

Bei der Vorrichtung nach der FR-A 1 323 954 ist der Kreuzschlitten auf einem Drehteller angebracht und mit dem Drehteller verdrehbar. Für den Antrieb der Werkzeugspindel dient ein Getriebemotor, der mit der Werkzeugspindel über einen Keilriementrieb verbunden ist. Es ist nur eine einzige Schablone vorgesehen, die drehfest auf der Werkzeugspindel angebracht wird. Zur Abtastung der Schablone dient eine an einem Schwenkhebel sitzende Rolle, wobei der Schwenkhebel mit einem zweiten Hebelarm über zwischengeschaltete Kugelelemente die Abtastbewegung auf einen weiteren Schwenkhebel eines Kopierwerkes überträgt. Die Einstellung der Ubersetzungsverhältnisse in den beiden Koordinatenrichtungen erfolgt nach Tabellen, wobei jeweils für die beiden Koordinatenrichtungen zur Erleichterung der Einstellung Meßuhren vorgesehen werden. Die Kopierwerke sind voneinander getrennt angebracht, wobei das der Längeneinstellung dienende Kopierwerk unterhalb der Werkzeugspindel und das zweite Kopierwerk in Abstand davon als gesonderter Bauteil quer zur Werkzeugspindel angebracht wird. Insgesamt ergibt sich ein aufwendiger Aufbau und es ist vor allem keine einfache Einstellung der relativen und absoluten Übersetzungsverhältnisse möglich. Dabei ist es schon schwierig bei Stufenbohrern mit gleicher Anzahl und Form der Spannuten auf den verschiedenen Bohrerstufen mit der gleichen Schablone weiterzuarbeiten und das Übersetzungsverhältnis entsprechend zu ändern. Problematisch wird es, wenn die Spannuten nicht exakt ineinander übergehen oder wenn beim Nachschleifen eine exakte Einstellung des nachzuschleifenden Werkzeuges gegenüber dem Schleifwerkzeug notwendig wird.In the device according to FR-A 1 323 954, the cross slide is mounted on a turntable and can be rotated with the turntable. A geared motor is used to drive the tool spindle, which is connected to the tool spindle via a V-belt drive. Only a single template is provided, which is attached to the tool spindle in a rotationally fixed manner. A roller seated on a swivel lever is used to scan the template, the swivel lever with a second lever arm transmitting the scanning movement to a further swivel lever of a copying unit via interposed ball elements. The translation ratios in the two coordinate directions are set according to tables, dial gauges being provided for each of the two coordinate directions to facilitate the setting. The copying units are mounted separately from each other, with the copying unit serving for length adjustment below the tool spindle and the second copying unit at a distance from it as a separate component is mounted transversely to the tool spindle. Overall, there is a complex structure and, above all, it is not easy to set the relative and absolute gear ratios. It is already difficult for step drills with the same number and shape of flutes to continue working on the different drill steps with the same template and to change the gear ratio accordingly. It becomes problematic if the flutes do not merge exactly with one another or if an exact adjustment of the tool to be regrind with respect to the grinding tool becomes necessary during regrinding.

Bei einer sich gattungsmäßig von einer Vorrichtung der eingangs genannten Art unterscheidenden Vorrichtung nach der DE-B 1 274 011 ist es bekannt, zur Erzielung einer Hinterschleifbewegung nicht die Werkzeugspindel, sondern das Schleifwerkzeug, z.B. eine angetriebene Schleifscheibe selbst von Kopierwerken aus unter Drehabtastung von Schablonen über zweiarmige Schwenkhebel zu verstellen. Eine entsprechende Ausführung setzt voraus, daß die gesamte Schleifvorrichtung von vornherein für eine entsprechende Möglichkeit der Verstellung des gesamten Schleifwerkzeuges ausgelegt werden muß. Ferner ist bei dieser Konstruktion nur eine bestimmte Schablone vorgesehen, wobei zwar das Übersetzungsverhältnis der Verstellung verändert werden kann, bei Änderung der Grundform des zu bearbeitenden Werkzeuges aber ein aufwendiger Umspann- und Einstellvorgang für die Schablonen notwendig wird.In the case of a device according to DE-B 1 274 011, which differs generically from a device of the type mentioned at the outset, it is known to achieve not only the tool spindle but the grinding tool, e.g. to adjust a driven grinding wheel even from copy machines by rotating templates using two-armed swivel levers. A corresponding design presupposes that the entire grinding device must be designed from the outset for a corresponding possibility of adjusting the entire grinding tool. Furthermore, only a certain template is provided in this construction, although the transmission ratio of the adjustment can be changed, but if the basic shape of the tool to be machined changes, a complex reclamping and adjustment process for the templates is necessary.

Aufgabe der Erfindung ist die Schaffung einer Vorrichtung der eingangs genannten Art, die bei einfacher Ausführung und leichter, insbesondere ohne Sonderwerkzeuge möglichen Bedienbarkeit eine exakte Positionierung der Werkzeuge beim Schleifvorgang ermöglicht, wobei auch bei komplizierten Stufenwerkzeugen Umspannvorgänge während des Bearbeitungsvorganges vermieden werden sollen, ein rascher und einfacher Wechsel auf andere Schablonen möglich ist und beim Nachschleifen die Anstellung der Bearbeitungsstelle an das Schleifwerkzeug vereinfacht wird.The object of the invention is to provide a device of the type mentioned which, with a simple design and easier operability, in particular without special tools, enables exact positioning of the tools enables during the grinding process, with re-clamping processes to be avoided during the machining process even with complicated step tools, a quick and easy change to other templates is possible and the reworking of the machining point on the grinding tool is simplified during regrinding.

Die gestellte Aufgabe wird durch die im Patentanspruch 1 angegebenen Merkmale gelöst.The object is achieved by the features specified in claim 1.

Die erfindungsgemäße Vorrichtung hat einen einfachen kompakten Gesamtaufbau, bei dem alle wesentlichen Teile geschützt im Gehäuse untergebracht sind. Als besonderer Vorteil ergibt sich, daß es die im Zuge der Werkzeugspindel vorgesehene, in jeder relativen Drehstellung ihrer beiden Hälften einrückbare Kupplung zuläßt, zunächst im ausgekuppelten Zustand eine Einstellung des Werkzeuges gegenüber dem Schleifwerkzeug vorzunehmen wodurch unter anderem die Positionierung beim Nachschleifen von Stufenwerkzeugen, deren Spannuten nicht exakt ineinander übergehen, wesentlich erleichtert wird. Bei ausgekuppelter Spindel oder bei auf eine Nullübersetzung eingestellten Kopierwerken können konzentrische Zylinder- und Kegelflächen am Werkzeug geschliffen werden.The device according to the invention has a simple compact overall structure in which all essential parts are protected in the housing. A particular advantage is that the coupling provided in the course of the tool spindle, which can be engaged in any relative rotational position of its two halves, allows the tool to be adjusted relative to the grinding tool in the disengaged state, which means, among other things, the positioning when regrinding step tools and their flutes do not merge exactly, it is much easier. When the spindle is disengaged or the copying units are set to a zero ratio, concentric cylinder and cone surfaces can be ground on the tool.

Durch die Verwendung eines ganzen Satzes unterschiedlicher Schablonen, die den verschiedenen zu bearbeitenden Werkzeugen zugeordnet werden können, wird die Einsatzmöglichkeit der erfindungsgemäßen Vorrichtung weiter erhöht. Bei einem wieder als Beispiel genannten Stufenbohrer mit verschiedener Anzahl oder Teilung bzw. Querschnittsform der Spannuten in den einzelnen Stufen wird bei eingespannt bleibendem Werkzeug eine Bearbeitung der einzelnen Stufen unter Verwendung der jeweils passenden zugeordneten Schablonen ermöglicht.By using a whole set of different templates, which can be assigned to the different tools to be machined, the possible uses of the device according to the invention are further increased. In the case of a step drill, again mentioned as an example, with a different number or division or cross-sectional shape of the flutes in the individual steps, with the tool remaining clamped, processing of the individual steps is made possible using the appropriate, assigned templates.

Eine vorteilhafte Ausgestaltung ist im Patentanspruch 2 angegeben. Dabei sind durch unterschiedliche Übersetzungsverhältnisse der beiden Kopierwerke alle notwendigen bzw. erwünschten Einstellungen durchführbar. Im Bedarfsfall kann man auch eines der Kopierwerke mit einer Nullübersetzung einstellen, so daß nur das andere Kopierwerk eine Verstellung in der dazugeordneten Koordinatenrichtung bewirkt.An advantageous embodiment is specified in claim 2. All necessary or desired settings can be made by different translation ratios of the two copying units. If necessary, one of the copying units can also be set with a zero translation, so that only the other copying unit causes an adjustment in the associated coordinate direction.

Als Kopierwerke können alle eine erwünschte Umsetzung der Abtastbewegung einer Schablone in eine Vorschubbewegung in der jeweiligen Koordinatenrichtung erzeugenden Kopierwerke, z. B. auch Pantografen- oder Storchschnabelkopierwerke eingesetzt werden, wobei auch zusätzliche Kupplungen Verwendung finden können, die gewährleisten, daß nur ein Teil der Abtastbewegung in eine Verstellbewegung umgesetzt wird. Eine besonders einfache und für die vorliegenden Forderungen besonders geeignete Ausgestaltung ist jedoch im Patentanspruch 3 angegeben.As copying units, all can produce a desired implementation of the scanning movement of a stencil in a feed movement in the respective coordinate direction, e.g. B. pantograph or cranesbill copiers can also be used, and additional couplings can be used to ensure that only part of the scanning movement is converted into an adjustment movement. A particularly simple and particularly suitable embodiment for the present requirements is specified in claim 3.

Für die Verstellung des Mitnehmers können Feintriebe mit zugeordneten Anzeigeeinrichtungen oder auch Feintriebe mit Stellmotoren vorgesehen werden, die als programmierbare Schrittmotoren ausgeführt sein können, so daß jedes gewünschte Übersetzungsverhältnis rasch und reproduzierbar eingestellt werden kann.For the adjustment of the driver, fine drives with associated display devices or fine drives with servomotors can be provided, which can be designed as programmable stepper motors, so that any desired transmission ratio can be set quickly and reproducibly.

Die verstellbaren Mitnehmer lassen sich in der im Patentanspruch 4 angegebenen Art und Weise realisieren.The adjustable driver can be realized in the manner specified in claim 4.

Schließlich ist eine einfache Ausführung im Patentanspruch 5 angegeben. Dadurch wird eine äußerst einfache Gesamtbauweise der Kopiereinrichtungen ermöglicht.Finally, a simple embodiment is given in claim 5. This enables an extremely simple overall construction of the copying devices.

Mit der erfindungsgemäßen Vorrichtung können alle vorkommenden Hinterschneidungen, auch gegenläufige Hinterschneidungen eingestellt und geschliffen werden, wobei sowohl axiale als auch radiale Hinterschneidungen möglich sind und es beim Schleifen von Spiralbohrerspitzen und ähnlichen Vorgängen auch durchführbar ist in der einen Koordinatenrichtung eine Vorschubbewegung und in der anderen Koordinatenrichtung eine Rückschubbewegung zu erzeugen.With the device according to the invention all occurring undercuts, including counter-undercuts, can be set and ground, both axial and radial undercuts being possible and when grinding twist drill tips and similar processes it is also possible to carry out a feed movement in one coordinate direction and one in the other coordinate direction To generate push-back movement.

Weitere Einzelheiten und Vorteile des Erfindungsgegenstandes entnimmt man der nachfolgenden Zeichnungsbeschreibung.Further details and advantages of the subject matter of the invention can be found in the following description of the drawings.

In der Zeichnung ist der Erfindungsgegenstand beispielsweise veranschaulicht. Es zeigt

Fig. 1
eine erfindungsgemäße Vorrichtung schematisiert in Draufsicht und
Fig. 2
in vereinfachter Darstellungsweise einen Längsschnitt durch das Gehäuse der erfindungsgemäßen Vorrichtung.
The subject matter of the invention is illustrated in the drawing, for example. It shows
Fig. 1
a device according to the invention schematically in plan view and
Fig. 2
in a simplified representation, a longitudinal section through the housing of the device according to the invention.

Auf einem seinerseits zumindest in zwei Koordinatenrichtungen gegenüber dem oder den Schleifwerkzeugen einer Schleifmaschine über Vorschubeinrichtungen verstellbaren Drehteller 1 ist eine Kreuzschlittenführung 2, 3 angebracht, an der ein Gehäuse 4 gegen Vorspannfedern verstellbar "schwimmend" gehalten ist, so daß das Gehäuse 4 Verstellbewegungen in den beiden Koordinatenrichtungen 5, 6, Drehbewegungen nach dem Pfeil 7 mit dem Drehteller und Schwenkbewegungen bei in den beiden Koordinatenrichtungen verschieden weit verstellten Abstützpunkten ausführen kann und damit die Einstellung einer im Gehäuse 4 gelagerten Werkzeugspindel 8 in die verschiedenen genannten Stellungen zur Einstellung von hinterschliffenen Flächen an einem von der Spindel 8 getragenen Werkzeug 9 ermöglicht, das beim Ausführungsbeispiel aus einem Stufen-Spiralbohrer besteht, bei dem die Spitze 10, die Nebenschneiden an den Spannuten 11, 12 und die Stirnschneide 13 zwischen den beiden Bohrerstufen 14, 15 zu hinterschneiden sind. Der Bohrer 9 greift mit seinem Schaft 16 in bekannter Weise in eine Wechselhalterung (Haltekonus) 17 des linken Spindelteiles 18 ein, der mit dem in Fig. 2 rechts dargestellten Teil 19 der Spindel 8 über eine ein- und ausrückbare Kupplung 20 verbunden ist, deren beide Kupplungshälften 21, 22 in jeder Drehstellung eingerückt werden können.On a turn at least in two coordinate directions with respect to the grinding tool or tools of a grinding machine via feed devices adjustable rotary table 1, a cross slide guide 2, 3 is attached, on which a housing 4 is held "floating" adjustable against biasing springs, so that the housing 4 adjustment movements in the two Coordinate directions 5, 6, rotary movements according to the arrow 7 with the turntable and pivoting movements can be carried out at differently adjusted support points in the two coordinate directions and thus the setting of a tool spindle 8 mounted in the housing 4 in the various positions mentioned for setting relief-ground surfaces on one of the spindle 8 carried tool 9, which in the embodiment consists of a step twist drill in which the tip 10, the minor cutting edges on the flutes 11, 12 and the end cutting edge 13 between the two drill stages 14, 15 to h are intercut. The drill 9 engages with its shaft 16 in a known manner in an interchangeable holder (holding cone) 17 of the left spindle part 18, which is connected to the part 19 of the spindle 8 shown on the right in FIG. 2 via a clutch 20 which can be engaged and disengaged both coupling halves 21, 22 can be engaged in any rotational position.

Der innerhalb des Gehäuses 4 befindliche rechte Teil 19 der Spindel 8 kann als Keilwelle ausgeführt sein. Auf ihm ist ein Satz aus mehreren Einzelschablonen 23 längsverschiebbar angebracht, wobei jeweils die zur Umrißform des eben eingespannten Werkzeuges 9 passende Schablone 23a in einer Arbeitsstellung über bekannte Mittel axial festgelegt wird. Die Werkzeugspindel 8 ist im Gehäuse mit nicht dargestellten Drehlagern drehbar gelagert. Ein rechts aus dem Gehäuse 4 herausgeführtes Ende 24 der Spindel 8 ist mit einem als Stellmotor ausgebildeten Getriebemotor 25 verbunden. Mit dessen Hilfe die Spindel 8 gesteuert drehend angetrieben wird.The right part 19 of the spindle 8 located within the housing 4 can be designed as a spline shaft. A set of several individual templates 23 is attached to it in a longitudinally displaceable manner, the template 23a matching the outline shape of the tool 9 just clamped in is fixed axially in a working position using known means. The tool spindle 8 is rotatably mounted in the housing with rotary bearings, not shown. An end 24 of the spindle 8 led out of the housing 4 on the right is connected to a geared motor 25 designed as a servomotor. With the help of which the spindle 8 is driven in a controlled rotating manner.

Wenn beim Ausführungsbeispiel beide Stufen 14 und 15 des Stufenbohrers 9 drei Spannuten 12 aufweisen, dann wird eine Schablone 23a verwendet, die eine der Querschnittsform der beiden Bohrerstufen 14, 15 angepaßte Umrißform besitzt. Mit der Schablone 23a steht ein Fühlstift 26 einer über nicht dargestellt Mittel im Gehäuse 4 längsverschiebbar geführten Kopierstange 27 im Eingriff, welche Kopierstange einen sich aus der Abtastung der Schablone 23a ergebenden Hub vollführt. Die Kopierstange 27 ist über ein Gelenk 28 direkt mit dem einen Ende eines quer zu ihr angeordneten zweiarmigen Schwenkhebels mit den Armen 29, 30 und über einen Diagonalhebel 31 mit dem anderen Ende 32 eines in seiner Grundstellung parallel zur vorderen Gehäusewand 33 angeordneten Schwenkhebels mit den Armen 34, 35 verbunden. Die beiden Schwenkhebel 29, 30 bzw. 34, 35 sind um aus dem Gehäuse 4 herausgeführte, am Drehtisch 1 fest angebrachte Achsen 36, 37 verschwenkbar. In der Ruhestellung des Hebels 29, 30 verläuft er etwa parallel zu einer Wand 38 des Gehäuses.If, in the exemplary embodiment, both steps 14 and 15 of step drill 9 have three flutes 12, then a template 23a is used which has an outline shape adapted to the cross-sectional shape of the two drill steps 14, 15. The template 23a is engaged by a sensing pin 26 of a copying rod 27 which is longitudinally displaceably guided by means not shown in the housing 4, which copying rod performs a stroke resulting from the scanning of the template 23a. The copying rod 27 is connected via a joint 28 directly to one end of a two-armed pivoting lever with arms 29, 30 arranged transversely to it and via a diagonal lever 31 to the other end 32 of a pivoting lever with the arms arranged in its basic position parallel to the front housing wall 33 34, 35 connected. The two swivel levers 29, 30 and 34, 35 can be pivoted about axes 36, 37 which are guided out of the housing 4 and are fixedly attached to the turntable 1. In the rest position of the lever 29, 30 it runs approximately parallel to a wall 38 of the housing.

Im Spalt 39, 40 zwischen den Hebeln 29, 30 und 34, 35 ist über die Hebellänge je eine den Spalt durch ihre Dicke überbrückende Walze 41, 42, welche auch als Mitnehmer oder Übertragungswalzen bezeichner werden können, verstellbar angebracht. Für die Verstellung dieser Walzen können parallel zu den Wänden 33, 38 angeordnete von Hand aus oder über Stellmotoren antreibbare, nicht dargestellte Feintriebe, Gewindespindeln u. dgl. vorgesehen werden. In der dargestellen Ruhelage behindern die Mitnehmer (Übertragungswalse) 41, 42 in keiner Weise eine durch Abtastung der Schablone 23a über die Kopierstange 27 erzeugte Schwenkbewegung der Hebel 29, 30 bzw. 34, 35. Wird eine der Walzen nach links oder rechts bzw. oben oder unten verstellt, so behindert sie eine Schwenkbewegung des zugeordneten Hebelarmes auf die Wand 33 bzw. 38 zu, so daß bei der entsprechenden Bewegung des zugeordneten Hebels das Gehäuse 4 samt der Spindel 8 um den entsprechenden Hub verstellt wird. Das effektive Ausmaß dieses Hubes ergibt sich aus der Relativverstellung der Kopierstange 27 durch die Schablone und aus dem Abstand der jeweiliegen Mitnehmer (Übertragungswalze) 41, 42 von der Schwenkachse 36 bzw. 37 des zugeordneten Hebels, so daß das Übersetzungsverhältnis der beiden Kopierwerke 29, 30, 36, 38, 42 und 34, 35, 37, 39, 41 stufenlos eingestellt werden kann und durch Verstellung der Walzen 41, 42 nach oben und unten bzw. links und rechts aus der Ruhestellung auch entsprechend richtige Verstellbewegungen für rechts- und linksdrehende Werkzeuge abgeleitet werden können. Die Verstellbewegung von Gehäuse 4 und Spindel 8 wird durch die "schwimmende" Abstützung des Gehäuses 4 am Kreuzschlitten 2, 3 aufgenommen.In the gap 39, 40 between the levers 29, 30 and 34, 35, a roller 41, 42 bridging the gap by its thickness, which can also be referred to as drivers or transfer rollers, is adjustably attached over the lever length. For the adjustment of these rollers parallel to the walls 33, 38 arranged by hand or via servomotors, not shown fine drives, threaded spindles and the like. Like. Be provided. In the rest position shown The drivers (transfer rollers) 41, 42 in no way hinder a pivoting movement of the levers 29, 30 or 34, 35 generated by scanning the template 23a via the copying rod 27. If one of the rollers is adjusted to the left or right or up or down, so it hinders a pivoting movement of the associated lever arm towards the wall 33 or 38, so that with the corresponding movement of the associated lever the housing 4 together with the spindle 8 is adjusted by the corresponding stroke. The effective extent of this stroke results from the relative adjustment of the copying rod 27 by the template and from the distance of the respective driver (transfer roller) 41, 42 from the pivot axis 36 and 37 of the associated lever, so that the transmission ratio of the two copying units 29, 30th , 36, 38, 42 and 34, 35, 37, 39, 41 can be adjusted continuously and by adjusting the rollers 41, 42 up and down or left and right from the rest position also the correct adjustment movements for right and left hand tools can be derived. The adjustment movement of the housing 4 and spindle 8 is absorbed by the "floating" support of the housing 4 on the cross slide 2, 3.

Claims (5)

  1. Apparatus for mounting and guiding twist tools, e.g. two-stage or multi-stage twist drills, for machining on grinding machines, comprising a cross slide (2, 3) for positioning the bearings of a tool spindle (8) comprising a change mounting (17) for the tool (9) for machining relatively to the grinding tool and a geared motor (25) for the rotary adjustment of the tool spindle (8), templates (23, 23a) being provided for fine adjustment of the tool spindle (8) in accordance with the two co-ordinate directions of the cross slide (2, 3), said templates (23, 23a) rotating with the tool spindle (8) and forming cam or indexing discs adapted to the cross-section or contour shape of the tool (9), copying mechanisms (29 to 42) being provided which together trace the templates and the transmission ratio of the copying mechanisms (29 to 42) being separately adjustable for the two co-ordinate directions so that the copying mechanisms (29 to 42) adjust the tool spindle (8) or its points of support in the associated co-ordinate direction by an amount defined by an instantaneous tracing point of the template (23a) and the value to which the transmission ratio has been adjusted, characterised in that the tool spindle (8) is encapsulated with the copying mechanisms (29 to 42) and templates (23) and spindle bearings in a housing (4) from which that part (18) of the tool spindle (8) which has the change mounting (17) projects and which is held in a basic position relatively to the cross slide (2, 3) by resilient clamping means the retention forces of which, however, are greater than possible components of machining forces at the tool (9) and is adjustable by means of the copying mechanisms (29 to 42) against said retaining forces, the points of support of the spindle mountings being pivoted, and a copying bar (27) guided for longitudinal displacement in the housing (4) is substantially radially displaceable relatively to the spindle (8) and is drivingly connected to the two copying mechanisms (29 to 42), while a set of different templates (23) associated with different tools (9) or tool stages (14, 15) may be provided and each of them be adjustable into a tracing position, and in that the spindle (8) is divided, between the change mounting (17) and a drive part (19) associated with the geared motor (25), for the templates (23, 23a) for sensing, by means of a coupling (20) engageable in any relative rotary position of its two halves (21, 22).
  2. Apparatus according to claim 1, characterised in that the templates (23) are disposed for axial displacement on a part (19) of the tool spindle (8) provided between the geared motor (25) and the coupling (20) and one (23a) of them is at any time axially lockable in the engagement position with the longitudinally displaceably guided copying bar (27).
  3. Apparatus according to claim 1, characterised in that the copying mechanisms (29 to 42) each comprise a two-armed pivoting lever (29, 30; 34, 35) drivingly connected to the copying bar (27) and in that the pivoting lever is pivotable by means of the copying bar (27), about a shaft (26, 37) taken out of the housing (4) and secured to the cross slide (2, 3), from a position of rest extending substantially normally to the associated adjustment co-ordinate of the cross slide (2, 3), an associated driver (41, 42) adjustable by means of the lever length adjusting the housing (4) with the spindle (8) in the associated co-ordinate direction in accordance with the template tracing, in a transmission ratio defined by the distance between said driver and the pivot axis (36, 37) of the pivoting lever.
  4. Apparatus according to claim 3, characterised in that the housing (4) comprises parallel abutment surfaces formed on outer housing walls (33, 38), said abutment surfaces being parallel to the pivoting levers (29, 30; 34, 35) in the position of rest, and transmission rollers (41, 42) are provided, which fill the gap between the abutment surfaces and the pivoting levers in the position of rest, said transmission rollers being adjustable by means of adjustment mechanisms by way of the lever length.
  5. Apparatus according to any one of claims 1 to 4, characterised in that the copying bar (27) is pivotally coupled directly by one end (29) of one pivoting lever (29, 30) disposed normally thereto, and, via a diagonal connecting lever (31), to the other end (34) of the second pivoting lever (34, 35) disposed approximately parallel thereto.
EP19910890297 1990-12-06 1991-12-05 Grinding device Expired - Lifetime EP0489708B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT246590A ATA246590A (en) 1990-12-06 1990-12-06 DEVICE FOR HOLDING AND GUIDING SPIRAL TOOLS TO BE MACHINED
AT2465/90 1990-12-06

Publications (2)

Publication Number Publication Date
EP0489708A1 EP0489708A1 (en) 1992-06-10
EP0489708B1 true EP0489708B1 (en) 1994-07-20

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EP (1) EP0489708B1 (en)
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Publication number Priority date Publication date Assignee Title
CN110919482B (en) * 2019-11-13 2021-07-30 嘉善联睿电子科技有限公司 Punching and polishing equipment for electronic product
CN113231921B (en) * 2021-04-14 2022-12-20 成都先进金属材料产业技术研究院股份有限公司 Metal plate fatigue sample polishing device and method
CN117226691B (en) * 2023-11-13 2024-01-12 烟台龙港泵业股份有限公司 Polishing device for production of centrifugal pump motor housing

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2929288A (en) * 1957-04-08 1960-03-22 Giannini Controls Corp Pantograph attachment for lathes and the like
NL278512A (en) * 1961-05-16
FR1401983A (en) * 1964-02-04 1965-06-11 Glaenzer Spicer Sa Improvements to profiling machines
FR2144284A5 (en) * 1971-06-30 1973-02-09 Habib Robert
US4005551A (en) * 1975-04-07 1977-02-01 Lines Roy C Cam operated stone grinding device

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ES2057848T3 (en) 1994-10-16
EP0489708A1 (en) 1992-06-10
ATA246590A (en) 1996-02-15
DE59102253D1 (en) 1994-08-25

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