EP0449767B1 - Centreless cylindrical grinding machine - Google Patents

Centreless cylindrical grinding machine Download PDF

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Publication number
EP0449767B1
EP0449767B1 EP91810118A EP91810118A EP0449767B1 EP 0449767 B1 EP0449767 B1 EP 0449767B1 EP 91810118 A EP91810118 A EP 91810118A EP 91810118 A EP91810118 A EP 91810118A EP 0449767 B1 EP0449767 B1 EP 0449767B1
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EP
European Patent Office
Prior art keywords
wheel
longitudinal
machine
grinding wheel
machine according
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EP91810118A
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German (de)
French (fr)
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EP0449767A1 (en
Inventor
Walter Pfluger
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Agathon AG Maschinenfabrik
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Agathon AG Maschinenfabrik
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Priority to AT91810118T priority Critical patent/ATE92824T1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work

Definitions

  • the present invention relates to a centerless cylindrical grinding machine according to the preamble of claim 1.
  • a centerless cylindrical grinding machine according to the preamble of claim 1.
  • Such a machine is already known from GB-A-981 609.
  • the workpiece support located between the grinding wheel and the regulating wheel is usually arranged on the regulating wheel carriage and, in order to adapt the machine to different workpiece diameters, is adjustable in the radial direction relative to the regulating wheel.
  • the workpiece support further comprises a workpiece support body which is displaceable in height and in the axial direction of the regulating wheel. To compensate for a taper or to align a parallelism with respect to the grinding wheel and / or with respect to the regulating wheel, the workpiece support body is additionally arranged so that it can be pivoted horizontally.
  • a dressing device with a dressing member is assigned to both the regulating wheel and the grinding wheel.
  • each of the dressing devices comprises a first dressing slide that can be moved in the longitudinal direction of the machine and a second dressing slide that can be moved at right angles to the first dressing slide.
  • Machines of the type outlined above and belonging to the prior art can be improved. Because of the longitudinal mobility and pivotability of the workpiece support body, if an automatic workpiece feeder is present, it must be adaptable and trackable to the respective position of the body mentioned. This requires considerable design and control engineering. Because the grinding wheel is non-pivotably connected to the machine bed, each pivoting movement of the workpiece support body relative to the grinding wheel results in readjusting the regulating wheel.
  • the invention solves this problem with a machine, which has the features listed in the characterizing part of claim 1.
  • the workpiece support can be essentially firmly connected to the machine bed.
  • the swivel position of the workpiece support relative to the grinding wheel is adjusted within the scope of the adjustment options of the latter by adjusting the grinding wheel.
  • the relative position of the regulating wheel to the workpiece support remains unchanged, i. H. the regulating wheel does not need to be readjusted.
  • the workpiece support is decoupled from the regulating wheel. Because the workpiece support is always in the same place, the workpiece feed device can be implemented with less effort compared to the prior art.
  • in-process measurements can be considerably simplified by the embodiment of the machine according to the invention.
  • the cross-slide drive for the grinding wheel can be made smaller.
  • the centerless cylindrical grinding machine which is shown in FIGS. 1 to 3, comprises a machine bed 1 on which a first horizontal plate 5 is pivotally mounted about a vertical axis 6 (pivoting direction C1). The edge region of the plate 5 opposite the pivot axis is supported by a support guide 40.
  • a first longitudinal slide 7 is arranged on the swivel plate 5 and has a part which can be displaced in the longitudinal direction X1 of the machine.
  • a first cross slide 8 is arranged on this part and has a part which can be displaced perpendicular to the direction X1 in the transverse direction Y1 of the machine.
  • a grinding wheel headstock 49 with a rotatably mounted grinding wheel 2 is fastened to this.
  • the axis of the grinding wheel 2 is designed as a hub 27, in which a shaft 28 engages in a longitudinally displaceable manner.
  • the torque transmission from the shaft to the hub takes place, for example, by means of a serration or by means of feather keys.
  • the shaft 28 is coupled, for example, via a V-belt drive 50 to the drive motor 39, which in this example is arranged on the first longitudinal slide 7.
  • This structure has the advantageous effect that the massive drive motor 39 does not have to be moved when the grinding wheel 2 is moved back and forth, for example when the grinding wheel executes its intended oscillating movements when machining workpieces.
  • An embodiment in which the drive motor 39 is attached to the first cross slide 8 is also possible especially for very small machines.
  • a first dressing device 12 for the grinding wheel 2 is arranged on the first pivotable plate 5 and is firmly connected to said plate.
  • the first dressing device 12 comprises a first dressing member 14, for example a diamond, which is positioned at the center height 16 of the grinding wheel axis and is held in the dressing device 12 by means of a locking device 51.
  • a workpiece support 4 is connected to the machine bed 1 at a distance A1 from the outer surface of the grinding wheel.
  • the workpiece support 4 comprises a workpiece support body 17. The horizontal distance and the horizontal angular position of the grinding wheel 2 relative to the support body 17 is set by means of the pivotable first plate 5, the first longitudinal slide 7 and the first cross slide 8.
  • a workpiece feed device 31 comprises, for example, a horizontal transport rail 29 attached to vertical stands 42, 43 and arranged above the machine.
  • a transport slide 32 arranged on the latter in a longitudinally displaceable manner has vertically movable feed arms 33, 34 for removing or dispensing workpieces on a workpiece supply device 30 and for feeding one workpiece to be machined on the support body 17 or for removing a machined workpiece from the support body 17. It is obvious and immediately apparent that the feeding and removal of the workpieces in the support body 17 is easier compared to the prior art if the support body is always the same in the longitudinal direction of the machine Positioned and always aligned in the transverse direction to the machine. The design and the control engineering effort of the feed device can be significantly reduced.
  • both the first longitudinal slide 7 and the first transverse slide 8 are each provided with a CNC-controlled axis, which is not specifically shown in the figures.
  • the axes are each driven by a drive motor 35 for the longitudinal slide and by a drive motor 37 for the cross slide.
  • the drive motors are electrically connected to an associated electronic control 21, 22.
  • the drive motors can either be stepper motors or servomotors, the effective position of the two slides being reported back to the electronic control via position sensors (not shown).
  • the pivot axis 6 for the first plate 5 is arranged in the area of the grinding wheel 2. In the course of the development of the machine, it has proven to be advantageous to have the pivot axis 6 for the first plate 5 run centrally through the workpiece support 4.
  • a regulating wheel 3 is provided horizontally spaced from the grinding wheel 2 in the longitudinal direction of the machine. It is arranged on a regulating disc headstock 47 and is rotatably mounted about an axis 19. The direction of rotation the regulating wheel is indicated in the figures with B2.
  • the regulating disc headstock 47 is fastened to a holding bracket 48 and can be inclined in the vertical direction V2 relative to the latter.
  • the heat development in the drive of the machine according to the invention which is designed with a toothed belt drive, is considerably smaller, which has an advantageous effect.
  • the regulating disc headstock 47 and the holding bracket 48 are fastened to a second cross slide 11 which can be displaced in the transverse direction Y2 of the machine.
  • the latter is arranged on a second longitudinal slide 10 which can be displaced in the longitudinal direction X2 of the machine.
  • This is in turn, practically identical to the design of the grinding wheel side, mounted on a second horizontal and pivotable plate 9.
  • This is pivotally mounted in the direction C2 on a further vertical pivot axis 24, which is advantageously arranged approximately centrally under the regulating disc 3.
  • the edge area, which lies opposite the pivot axis 24 of the second plate 9, is supported by a further support guide 41.
  • the second slides 10, 11 for the regulating wheel 3 are also preferably set by CNC-controlled drives 36, for the longitudinal slide 10, and 38 for the cross slide 11.
  • a second dressing device 13 is mounted immovably on the second plate 9, this second dressing device 13 comprising a second dressing member 15, for example in the form of a further diamond, which is arranged at the center height 16 of the regulating wheel axis 19 is.
  • the second dressing member 15 is fastened to the second dressing device 13 with holding means 52.
  • the pivoting movement of the second plate can, although not shown in the drawing, also be carried out by a further numerically controlled drive.
  • a very significant advantage of the machine according to the invention is that the longitudinal or transverse slides 7, 10; 8, 11 can be used not only for feeding the grinding wheel 2 and the regulating wheel 3 to a workpiece to be machined, but also for feeding the grinding wheel 2 to the first dressing device 12 and for feeding the regulating wheel 3 to the second dressing device 13.
  • the longitudinal or transverse slides 7, 10; 8, 11 can be used not only for feeding the grinding wheel 2 and the regulating wheel 3 to a workpiece to be machined, but also for feeding the grinding wheel 2 to the first dressing device 12 and for feeding the regulating wheel 3 to the second dressing device 13.
  • four numerically controlled axes X1, Y1, X2, Y2 which in conventional machines alone have to be used to control the two dressing devices, both the dressing processes and the machining processes can be controlled in the machine according to the invention.
  • at least two of the relatively expensive numerical drives can be saved.
  • taper compensation or parallelism alignments can be carried out by the grinding wheel 2 and / or the regulating wheel 3.
  • the machine is programmed via a control panel 22, which is connected to electronic cabinets 21 of the electronic control system via a cable channel 44.
  • the vertical inclination setting V2 of the regulating wheel 3 can also be carried out either manually or by an additional numerically controlled operation.
  • a protective hood 53 covers the machine bed with the grinding and regulating wheel arrangements thereon.
  • the electronic control 21, 22 assigned to the machine can also be used, among other things, to calculate the control wheel contour and to generate the latter by the second dressing device 13. Since the control wheel is aligned to the center height, it is necessary to convert the control wheel contour to be generated as a function of the altitude, the diameter of a workpiece to be machined and the inclination of the control wheel. This conversion must take place because a workpiece is usually machined above the center height 16 of the regulating and grinding wheels, while the regulation wheel is aligned to the center height. Without conversion, there would be a distortion of the regulating wheel contour.
  • the embodiment of the centerless cylindrical grinding machine according to the invention shown in this example is suitable for drive powers of the grinding wheel of approximately 9 kW.
  • the machining diameters of the workpieces are advantageously below about 15 mm.
  • Appropriately adapted and reinforced constructions would of course also make and use larger machines which have the features according to the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Abstract

The machine comprises a machine bed (1), a grinding wheel (2), a control wheel (3), which is arranged in the longitudinal direction of the machine at a horizontal distance from the grinding wheel, as well as a work rest (4), provided between the wheels, for holding a workpiece to be machined. The work rest (4) is arranged on the machine bed, comprises a support body (17) and is only vertically adjustable in the machine. A first longitudinal slide (7) displaceable in the longitudinal direction of the machine is arranged on a first plate (5) pivotable in a horizontal plane, and a first cross slide displaceable in the transverse direction of the machine is arranged on this longitudinal slide (7). The first cross slide contains the grinding wheel (2). In a similar manner, the control wheel (3) is arranged on a second cross slide (11) which in turn is fastened to a second longitudinal slide (10) which in turn is mounted on a second horizontally pivotable plate (9). A first and a second dressing device (12, 13) each for dressing the grinding wheel and the control wheel respectively are connected in a fixed position to one each of the pivotable plates (5, 9). Both the work feed and the in-process measurement can be simplified by this arrangement. The numerically controlled axes for driving the said longitudinal and cross slides can be used for setting the wheels (2, 3) to the workpiece and for setting the wheels (2, 3) to the corresponding dressing device (12, 13). Relatively expensive numerically controlled drives can thereby be reduced in number compared with machines belonging to the prior art. <IMAGE>

Description

Die vorliegende Erfindung bezieht sich auf eine spitzenlose Rundschleifmaschine gemäss dem Oberbegriff des Patentanspruches 1. Eine solche Maschine ist bereits aus der GB-A-981 609 bekannt.The present invention relates to a centerless cylindrical grinding machine according to the preamble of claim 1. Such a machine is already known from GB-A-981 609.

Spitzenlose Rundschleifmaschinen der obgenannten Gattung sind üblicherweise mit einem fest mit dem Maschinenbett verbundenen Schleifscheibenspindelstock als Träger der Schleifscheibe ausgerüstet. Die der Schleifscheibe gegenüberliegende Regelscheibe ist mit einem Regelscheibenspindelstock dem Stand der Technik entsprechend auf einem Regelscheibenschlitten gelagert. Die Regelscheibe kann zum Einstellen der Maschine beispielsweise wie folgt verstellt werden:

  • Zustellen der Regelscheibe in radialer Richtung zur Schleifscheibe,
  • vertikales Schwenken der Regelscheibe zum Einstellen des axialen Vorschubes des Werkstückes,
  • Längsbewegung in Achsrichtung zum Ausrichten der Regelscheibenkanten und
  • horizontales Schwenken der auf dem Schlitten angeordneten Regelscheibe um eine vertikale Achse zum Einstellen einer bestimmten ausgerichteten Lage zur Schleifscheibe.
Centerless cylindrical grinding machines of the abovementioned type are usually equipped with a grinding wheel headstock which is firmly connected to the machine bed as a carrier of the grinding wheel. The regulating wheel opposite the grinding wheel is mounted on a regulating wheel carriage with a regulating wheel headstock according to the state of the art. The regulating wheel can be adjusted to set the machine, for example, as follows:
  • Feed the regulating wheel in a radial direction to the grinding wheel,
  • vertical swiveling of the regulating wheel to adjust the axial feed of the workpiece,
  • Longitudinal movement in the axial direction to align the regulating wheel edges and
  • horizontal pivoting of the regulating wheel arranged on the slide around a vertical axis for setting a specific aligned position with respect to the grinding wheel.

Die sich zwischen der Schleifscheibe und der Regelscheibe befindende Werstückauflage ist üblicherweise auf dem Regelscheibenschlitten angeordnet und zum Anpassen der Maschine an unterschiedliche Werkstückdurchmesser in radialer Richtung relativ zur Regelscheibe verstellbar. Die Werkstückauflage umfasst im weiteren einen Werkstückauflagekörper, welcher in der Höhe, sowie in der Achsrichtung der Regelscheibe verschiebbar ist. Zum Ausgleichen einer Konizität oder Ausrichten einer Parallelität gegenüber der Schleifscheibe und/oder gegenüber der Regelscheibe ist der Werstückauflagekörper zusätzlich horizontal verschwenkbar angeordnet.The workpiece support located between the grinding wheel and the regulating wheel is usually arranged on the regulating wheel carriage and, in order to adapt the machine to different workpiece diameters, is adjustable in the radial direction relative to the regulating wheel. The workpiece support further comprises a workpiece support body which is displaceable in height and in the axial direction of the regulating wheel. To compensate for a taper or to align a parallelism with respect to the grinding wheel and / or with respect to the regulating wheel, the workpiece support body is additionally arranged so that it can be pivoted horizontally.

Sowohl der Regelscheibe als auch der Schleifscheibe ist je eine Abrichtvorrichtung mit einem Abrichtorgan zugeordnet. Zum Zustellen des entsprechenden Abrichtorganes an die Regelscheibe bzw. an die Schleifscheibe umfasst jede der Abrichtvorrichtungen je einen in der Längsrichtung der Maschine bewegbaren ersten Abrichtschlitten sowie je einen rechtwinklig zum ersten Abrichtschlitten bewegbaren zweiten Abrichtschlitten.A dressing device with a dressing member is assigned to both the regulating wheel and the grinding wheel. To deliver the corresponding dressing member to the regulating wheel or to the grinding wheel, each of the dressing devices comprises a first dressing slide that can be moved in the longitudinal direction of the machine and a second dressing slide that can be moved at right angles to the first dressing slide.

Es ist ebenfalls bekannt, die einzelnen der genannten Schlitten und/oder die Ein- und Zustellbewegungen der weiteren der genannten Maschinenteile numerisch gesteuert anzutreiben.It is also known to drive the individual of the slides mentioned and / or the infeed and infeed movements of the other of the machine parts mentioned numerically controlled.

Maschinen der oben skizzierten, zum Stand der Technik gehörenden Art können verbessert werden. Wegen der Längsbewegbarkeit und Verschwenkbarkeit des Werkstückauflagekörpers muss im Falle des Vorhandenseins einer automatischen Werkstückzuführung diese der jeweiligen Lage des genannten Körpers anpassbar und nachführbar sein. Dies bedingt einen erheblichen konstruktiven und steuerungstechnischen Aufwand. Weil die Schleifscheibe unverschwenkbar mit dem Maschinenbett verbunden ist hat jede Schwenkbewegung des Werkstückauflagekörpers gegenüber der Schleifscheibe ein erneutes Nachjustieren der Regelscheibe zur Folge.Machines of the type outlined above and belonging to the prior art can be improved. Because of the longitudinal mobility and pivotability of the workpiece support body, if an automatic workpiece feeder is present, it must be adaptable and trackable to the respective position of the body mentioned. This requires considerable design and control engineering. Because the grinding wheel is non-pivotably connected to the machine bed, each pivoting movement of the workpiece support body relative to the grinding wheel results in readjusting the regulating wheel.

Es ist die Aufgabe der vorliegenden Erfindung eine Maschine vorzuschlagen, bei der es nicht notwendig ist, die Werkstückzuführung der jeweiligen Position des Werkstückauflagekörpers anzupassen und bei der die Verschwenklage des letzteren relativ zur Schleifscheibe geändert werden kann, ohne dass ein Nachjustieren der Regelscheibe notwendig ist.It is the object of the present invention to propose a machine in which it is not necessary to adapt the workpiece feed to the respective position of the workpiece support body and in which the pivoting position of the latter relative to the grinding wheel can be changed without having to readjust the regulating wheel.

Die Erfindung löst diese Aufgabe mit einer Maschine, die die im kennzeichnenden Teil des Patentanspruches 1 aufgeführten Merkmale aufweist.The invention solves this problem with a machine, which has the features listed in the characterizing part of claim 1.

Dadurch, dass die Schleifscheibe in den aufgeführten verschiedenen Richtungen verstellbar angeordnet ist, kann die Werkstückauflage mit dem Maschinenbett im wesentlichen fest verbunden werden. Die Schwenklage der Werkstückauflage relativ zur Schleifscheibe wird im Rahmen der Verstellmöglichkeiten der letzteren durch das Verstellen der Schleifscheibe eingestellt. Die relative Lage der Regelscheibe zur Werkstückauflage bleibt dabei unverändert, d. h. die Regelscheibe braucht nicht neu eingestellt zu werden. Die Werkstückauflage ist von der Regelscheibe entkoppelt. Durch die sich immer am gleichen Ort befindliche Werkstückauflage kann die Werkstückzuführeinrichtung gegenüber dem Stand der Technik mit kleinerem Aufwand realisiert werden. Als weiterer Vorteil können durch die erfindungsgemässe Ausführungsform der Maschine Inprozessmessungen beträchtlich vereinfacht werden.Because the grinding wheel is arranged to be adjustable in the various directions listed, the workpiece support can be essentially firmly connected to the machine bed. The swivel position of the workpiece support relative to the grinding wheel is adjusted within the scope of the adjustment options of the latter by adjusting the grinding wheel. The relative position of the regulating wheel to the workpiece support remains unchanged, i. H. the regulating wheel does not need to be readjusted. The workpiece support is decoupled from the regulating wheel. Because the workpiece support is always in the same place, the workpiece feed device can be implemented with less effort compared to the prior art. As a further advantage, in-process measurements can be considerably simplified by the embodiment of the machine according to the invention.

Zusätzliche vorteilhafte Wirkungen sind mit der erfindungsgemässen Maschine mit Ausführungsformen wie sie in den abhängigen Patentansprüchen aufgeführt sind erzielbar.Additional advantageous effects can be achieved with the machine according to the invention with embodiments as set out in the dependent claims.

Für viele Bearbeitungsfälle hat es sich als vorteilhaft erwiesen, die Schleifscheibe durch periodische Hin- und Herbewegungen oszillierend auszuführen. Dadurch, dass der massige Antriebsmotor für die Schleifscheibe durch besondere konstruktive Massnahmen diese Oszillationsbewegungen nicht mitmachen muss, kann der Querschlittenantrieb für die Schleifscheibe kleiner dimensioniert werden.For many machining cases, it has proven to be advantageous to make the grinding wheel oscillate by means of periodic back and forth movements. Because the massive drive motor for the grinding wheel does not have to take part in these oscillating movements due to special design measures, the cross-slide drive for the grinding wheel can be made smaller.

Durch das Antreiben der Regelscheibe mittels einem Servomotor, der über einen Zahnriemen mit der Regelscheibenachse gekoppelt ist, ist die nachteilige Wärmeentwicklung der sonst verwendeten Schneckengetriebe beseitigbar.By driving the regulating wheel by means of a servo motor, which is coupled to the regulating wheel axis via a toothed belt, there is the disadvantageous heat development the worm gear used otherwise can be eliminated.

Durch die praktisch identische Anordnung des Schleifscheiben- und des Regelscheibenspindelstockes mit je den gekennzeichneten Einstellmöglichkeiten können spezielle Schlitten für die Abrichtvorrichtungen weggelassen werden. Die letzteren können beispielsweise ortsfest mit den schwenkbaren Platten verbunden sein. Mit den zum Verstellen der Schleif- und der Regelscheibe vorhandenen Längs- und Querschlitten können die beiden Scheiben sowohl dem zu bearbeitenden Werkstück als auch je der entsprechenden Abrichtvorrichtung zugeführt werden. Die gleichen numerisch gesteuerten Achsen sind einerseits für den Bearbeitungsvorgang und andererseits für den Abrichtvorgang verwendbar. Gegenüber zum Stand der Technik zählenden Maschinen können auf diese Weise relativ teure numerisch gesteuerte Antriebe in ihrer Anzahl reduziert werden. Gegenüber üblicherweise sechs CNC-gesteuerten Achsen sind in der erfindungsgemässen Maschine zum Ausführen von mindestens sich entsprechenden Funktionen nur noch deren vier notwendig.Due to the practically identical arrangement of the grinding wheel and regulating wheel headstock, each with the marked setting options, special slides for the dressing devices can be omitted. The latter can, for example, be connected in a stationary manner to the pivotable plates. With the longitudinal and cross slides available for adjusting the grinding wheel and the regulating wheel, the two wheels can be fed both to the workpiece to be machined and to the respective dressing device. The same numerically controlled axes can be used on the one hand for the machining process and on the other hand for the dressing process. Compared to the state of the art machines, the number of relatively expensive numerically controlled drives can be reduced in this way. Compared to usually six CNC-controlled axes, only four of them are necessary in the machine according to the invention to perform functions that are at least corresponding.

Mit der erfindungsgemässen spitzenlosen Rundschleifmaschine sind die folgenden Bearbeitungsoperationen in vorteilhafter Weise durchführbar:

  • Einstechschleifen
  • Schrägeinstechschleifen komplexer Formen
  • Durchlaufschleifen
  • Schulterschleifen
  • Konzentrischschleifen
The following machining operations can advantageously be carried out with the centerless cylindrical grinding machine according to the invention:
  • Plunge grinding
  • Oblique plunge grinding of complex shapes
  • Continuous grinding
  • Shoulder bows
  • Concentric grinding

Die vorliegende Erfindung wird im folgenden anhand von Zeichnungen beispielsweise näher beschrieben. Es zeigen

Fig. 1
einen Grundriss der erfindungsgemässem Maschine,
Fig. 2
eine Seitenansicht der Maschine gemäss der Fig. 1, und
Fig. 3
eine isometrische Darstellung zum Verdeutlichen der verschiedenen Einstellbewegungen der Schleif- und der Regelscheibe.
The present invention is described in more detail below with reference to drawings, for example. Show it
Fig. 1
a plan of the machine according to the invention,
Fig. 2
a side view of the machine of FIG. 1, and
Fig. 3
an isometric view to illustrate the different adjustment movements of the grinding wheel and the regulating wheel.

Die erfindungsgemässe spitzenlose Rundschleifmaschine, die in den Fig. 1 bis 3 dargestellt ist, umfasst ein Maschinenbett 1, an welchem eine erste horizontale Platte 5 um eine vertikale Achse 6 schwenkbar gelagert ist (Schwenkrichtung C1). Der der Schwenkachse gegenüberliegende Randbereich der Platte 5 ist durch eine Aufliegeführung 40 abgestützt. Auf der Schwenkplatte 5 ist ein erster Längsschlitten 7 angeordnet, der einen in Längsrichtung X1 der Maschine verschiebbaren Teil aufweist. An diesem Teil ist ein erster Querschlitten 8 angeordnet, der einen senkrecht zur Richtung X1 in Querrichtung Y1 der Maschine verschiebbaren Teil aufweist. An diesem ist ein Schleifscheibenspindelstock 49 mit einer drehbar gelagerten Schleifscheibe 2 befestigt. Die Achse der Schleifscheibe 2 ist als Nabe 27 ausgeführt, in welche eine Welle 28 längsverschiebbar eingreift. Die Drehmomentübertragung von der Welle zur Nabe erfolgt beispielsweise mittels einer Kerbverzahnung oder mittels Passfedern. Die Welle 28 ist beispielsweise über einen Keilriementrieb 50 mit dem Antriebsmotor 39 gekoppelt, welcher in diesem Beispiel auf dem ersten Längsschlitten 7 angeordnet ist. Dieser Aufbau hat die vorteilhafte Wirkung, dass der massige Antriebsmotor 39 beim Hin- und Herbewegen der Schleifscheibe 2, beispielsweise wenn letztere ihre vorgesehenen Oszillationsbewegungen beim Bearbeiten von Werkstücken ausführt, nicht mitbewegt werden muss. Eine Ausführungsform, bei welcher der Antriebsmotor 39 am ersten Querschlitten 8 befestigt ist, ist insbesondere für sehr kleine Maschinen ebenfalls möglich. Das Pulley des Keilriementriebes 50 kann in diesem Fall direkt an der Schleifscheibenachse befestigt werden. Die Drehrichtung der Achse ist in den Figuren mit B1 bezeichnet. An der ersten schwenkbaren Platte 5 ist eine erste Abrichtvorrichtung 12 für die Schleifscheibe 2 angeordnet und mit der genannten Platte fest verbunden. Die erste Abrichtvorrichtung 12 umfasst ein erstes Abrichtorgan 14, beispielsweise einen Diamanten, welcher auf Zentrumhöhe 16 der Schleifscheibenachse positioniert und mittels einer Feststelleinrichtung 51 in der Abrichtvorrichtung 12 gehalten ist. Eine Werkstückauflage 4 ist beabstandet zur Mantelfläche der Schleifscheibe mit dem Maschinenbett 1 lediglich in der Höhe A1 verstellbar verbunden. Die Werkstückauflage 4 umfasst einen Werkstückauflagekörper 17. Der horizontale Abstand und die horizontale Winkellage der Schleifscheibe 2 zum Auflagekörper 17 wird mittels der schwenkbaren ersten Platte 5, des ersten Längsschlittens 7 und des ersten Querschlittens 8 eingestellt.The centerless cylindrical grinding machine according to the invention, which is shown in FIGS. 1 to 3, comprises a machine bed 1 on which a first horizontal plate 5 is pivotally mounted about a vertical axis 6 (pivoting direction C1). The edge region of the plate 5 opposite the pivot axis is supported by a support guide 40. A first longitudinal slide 7 is arranged on the swivel plate 5 and has a part which can be displaced in the longitudinal direction X1 of the machine. A first cross slide 8 is arranged on this part and has a part which can be displaced perpendicular to the direction X1 in the transverse direction Y1 of the machine. A grinding wheel headstock 49 with a rotatably mounted grinding wheel 2 is fastened to this. The axis of the grinding wheel 2 is designed as a hub 27, in which a shaft 28 engages in a longitudinally displaceable manner. The torque transmission from the shaft to the hub takes place, for example, by means of a serration or by means of feather keys. The shaft 28 is coupled, for example, via a V-belt drive 50 to the drive motor 39, which in this example is arranged on the first longitudinal slide 7. This structure has the advantageous effect that the massive drive motor 39 does not have to be moved when the grinding wheel 2 is moved back and forth, for example when the grinding wheel executes its intended oscillating movements when machining workpieces. An embodiment in which the drive motor 39 is attached to the first cross slide 8 is also possible especially for very small machines. In this case, the pulley of the V-belt drive 50 can be attached directly to the grinding wheel axis. The direction of rotation of the axis is designated B1 in the figures. A first dressing device 12 for the grinding wheel 2 is arranged on the first pivotable plate 5 and is firmly connected to said plate. The first dressing device 12 comprises a first dressing member 14, for example a diamond, which is positioned at the center height 16 of the grinding wheel axis and is held in the dressing device 12 by means of a locking device 51. A workpiece support 4 is connected to the machine bed 1 at a distance A1 from the outer surface of the grinding wheel. The workpiece support 4 comprises a workpiece support body 17. The horizontal distance and the horizontal angular position of the grinding wheel 2 relative to the support body 17 is set by means of the pivotable first plate 5, the first longitudinal slide 7 and the first cross slide 8.

Eine Werkstückzuführeinrichtung 31 umfasst beispielsweise eine an vertikalen Ständern 42, 43 befestigte, über der Maschine angeordnete horizontale Transportschiene 29. Ein an letzterer längsverschiebbar angeordneter Transportschlitten 32 weist vertikal bewegbare Zuführarme 33, 34 zum Entnehmen oder Abgeben von Werkstücken an einer Werkstückbereitstellungseinrichtung 30 und zum Zuführen eines zu bearbeitenden Werkstückes an den Auflagekörper 17 oder zum Entnehmen eines bearbeiteten Werkstückes vom Auflagekörper 17 auf. Es ist einleuchtend und sofort ersichtlich, dass das Zuführen und Entnehmen der Werkstücke beim Auflagekörper 17 gegenüber dem Stand der Technik einfacher ist, wenn der Auflagekörper in der Längsrichtung der Maschine immer am gleichen Ort positioniert und immer in Querrichtung zur Maschine ausgerichtet ist. Der konstruktive und der steuerungstechnische Aufwand der Zuführeinrichtung können dadurch erheblich reduziert werden. Weil sich das Werkstück praktisch immer in der gleichen Position befindet, die als sogenannte Nullage bezeichnet werden könnte, ist auch der Steuerungsaufwand oder der Programmieraufwand für Inprozessmessungen wesentlich geringer als bei herkömmlichen Maschinen. Im gezeigten Ausführungsbeispiel ist sowohl der erste Längsschlitten 7 als auch der erste Querschlitten 8 je mit einer CNC-gesteuerten, in den Figuren nicht speziell dargestellten Achse versehen. Die Achsen werden je durch einen Antriebsmotor 35 für den Längsschlitten und durch einen Antriebsmotor 37 für den Querschlitten angetrieben. Die Antriebsmotoren sind mit einer zugeordneten elektronischen Steuerung 21, 22 elektrisch verbunden. Die Antriebsmotoren können entweder Schrittmotoren sein oder Servomotoren, wobei die effektive Stellung der beiden Schlitten über nicht dargestellte Positionsgeber der elektronischen Steuerung zurückgemeldet werden. Es ist im weiteren ebenfalls möglich und vorgesehen, die erste Platte 5 mittels einem CNC-gesteuerten Schwenkantrieb auszurüsten. Dieser ist der Uebersichtlichkeit wegen aus den Fig. nicht ersichtlich. Die Schwenkachse 6 für die erste Platte 5 ist im Bereich der Schleifscheibe 2 angeordnet. Es hat sich dabei im Verlaufe der Entwicklung der Maschine als vorteilhaft erwiesen, die Schwenkachse 6 für die erste Platte 5 mittig durch die Werkstückauflage 4 verlaufen zu lassen.A workpiece feed device 31 comprises, for example, a horizontal transport rail 29 attached to vertical stands 42, 43 and arranged above the machine. A transport slide 32 arranged on the latter in a longitudinally displaceable manner has vertically movable feed arms 33, 34 for removing or dispensing workpieces on a workpiece supply device 30 and for feeding one workpiece to be machined on the support body 17 or for removing a machined workpiece from the support body 17. It is obvious and immediately apparent that the feeding and removal of the workpieces in the support body 17 is easier compared to the prior art if the support body is always the same in the longitudinal direction of the machine Positioned and always aligned in the transverse direction to the machine. The design and the control engineering effort of the feed device can be significantly reduced. Because the workpiece is practically always in the same position, which could be referred to as the so-called zero position, the control effort or programming effort for in-process measurements is also significantly less than with conventional machines. In the exemplary embodiment shown, both the first longitudinal slide 7 and the first transverse slide 8 are each provided with a CNC-controlled axis, which is not specifically shown in the figures. The axes are each driven by a drive motor 35 for the longitudinal slide and by a drive motor 37 for the cross slide. The drive motors are electrically connected to an associated electronic control 21, 22. The drive motors can either be stepper motors or servomotors, the effective position of the two slides being reported back to the electronic control via position sensors (not shown). It is also possible and provided in the following to equip the first plate 5 by means of a CNC-controlled swivel drive. For reasons of clarity, this cannot be seen from the figures. The pivot axis 6 for the first plate 5 is arranged in the area of the grinding wheel 2. In the course of the development of the machine, it has proven to be advantageous to have the pivot axis 6 for the first plate 5 run centrally through the workpiece support 4.

Horizontal beabstandet zur Schleifscheibe 2 ist in Längsrichtung der Maschine eine Regelscheibe 3 vorhanden. Sie ist an einem Regelscheibenspindelstock 47 angeordnet und um eine Achse 19 drehbar gelagert. Die Drehrichtung der Regelscheibe ist in den Figuren mit B2 angegeben. Der Regelscheibenspindelstock 47 ist an einem Haltewinkel 48 befestigt und gegenüber dem letzteren in vertikaler Richtung V2 neigbar. Ein Servomotor 18, der über einen Zahnriemen 20 mit der Regelscheibenachse 19 gekoppelt ist, sorgt für den stufenlos regelbaren Antrieb der letzteren. Gegenüber üblicherweise verwendeten Schneckengetrieben zum Antreiben der Regelscheibe ist die Wärmeentwicklung bei dem mit einem Zahnriementrieb ausgeführten Antrieb der erfindungsgemässen Maschine beträchtlich kleiner, was sich in vorteilhafter Weise auswirkt. Der Regelscheibenspindelstock 47 und der Haltewinkel 48 sind an einem in Querrichtung Y2 der Maschine verschiebbaren zweiten Querschlitten 11 befestigt. Der letztere ist auf einem zweiten, in Längsrichtung X2 der Maschine verschiebbaren Längsschlitten 10 angeordnet. Dieser ist wiederum, praktisch identisch mit der Ausführung der Schleifscheibenseite, auf einer zweiten horizontalen und schwenkbaren Platte 9 montiert. Diese ist an einer weiteren vertikalen Schwenkachse 24, die in vorteilhafter Weise etwa mittig unter der Regelscheibe 3 angeordnet ist, in der Richtung C2 schwenkbar gelagert. Der Randbereich, der der Schwenkachse 24 der zweiten Platte 9 gegenüberliegt, ist durch eine weitere Aufliegeführung 41 abgestützt. In analoger Weise zur Schleifscheibenseite werden die zweiten Schlitten 10, 11 für die Regelscheibe 3 in bevorzugter Weise ebenfalls durch CNC-gesteuerte Antriebe 36, für den Längsschlitten 10, und 38 für den Querschlitten 11, eingestellt. Eine zweite Abrichtvorrichtung 13 ist an der zweiten Platte 9 unverschiebbar montiert, wobei diese zweite Abrichtvorrichtung 13 ein zweites Abrichtorgan 15, beispielsweise in Form eines weiteren Diamanten umfasst, welcher auf der Zentrumhöhe 16 der Regelscheibenachse 19 angeordnet ist. Das zweite Abrichtorgan 15 ist mit Festhaltemitteln 52 an der zweiten Abrichtvorrichtung 13 befestigt. Die Schwenkbewegung der zweiten Platte kann, obschon dies in der Zeichnung nicht dargestellt ist, ebenfalls durch einen weiteren numerisch gesteuerten Antrieb erfolgen.A regulating wheel 3 is provided horizontally spaced from the grinding wheel 2 in the longitudinal direction of the machine. It is arranged on a regulating disc headstock 47 and is rotatably mounted about an axis 19. The direction of rotation the regulating wheel is indicated in the figures with B2. The regulating disc headstock 47 is fastened to a holding bracket 48 and can be inclined in the vertical direction V2 relative to the latter. A servo motor 18, which is coupled to the regulating pulley axis 19 via a toothed belt 20, ensures the continuously variable drive of the latter. Compared to the worm gears usually used to drive the regulating disk, the heat development in the drive of the machine according to the invention, which is designed with a toothed belt drive, is considerably smaller, which has an advantageous effect. The regulating disc headstock 47 and the holding bracket 48 are fastened to a second cross slide 11 which can be displaced in the transverse direction Y2 of the machine. The latter is arranged on a second longitudinal slide 10 which can be displaced in the longitudinal direction X2 of the machine. This is in turn, practically identical to the design of the grinding wheel side, mounted on a second horizontal and pivotable plate 9. This is pivotally mounted in the direction C2 on a further vertical pivot axis 24, which is advantageously arranged approximately centrally under the regulating disc 3. The edge area, which lies opposite the pivot axis 24 of the second plate 9, is supported by a further support guide 41. In an analogous manner to the grinding wheel side, the second slides 10, 11 for the regulating wheel 3 are also preferably set by CNC-controlled drives 36, for the longitudinal slide 10, and 38 for the cross slide 11. A second dressing device 13 is mounted immovably on the second plate 9, this second dressing device 13 comprising a second dressing member 15, for example in the form of a further diamond, which is arranged at the center height 16 of the regulating wheel axis 19 is. The second dressing member 15 is fastened to the second dressing device 13 with holding means 52. The pivoting movement of the second plate can, although not shown in the drawing, also be carried out by a further numerically controlled drive.

Ein ganz wesentlicher Vorteil der erfindungsgemässen Maschine besteht nun darin, dass die bereits genannten Längs- bzw. Querschlitten 7, 10; 8, 11 nicht nur zum Zustellen der Schleifscheibe 2 und der Regelscheibe 3 an ein zu bearbeitendes Werkstück benutzt werden, sondern ebenfalls zum Zustellen der Schleifscheibe 2 an die erste Abrichtvorrichtung 12 sowie zum Zustellen der Regelscheibe 3 an die zweite Abrichtvorrichtung 13 benutzbar sind. Mit vier numerisch gesteuerten Achsen X1, Y1, X2, Y2, die in herkömmlichen Maschinen schon alleine zum Steuern der beiden Abrichtvorrichtungen aufgewendet werden müssen, können bei der erfindungsgemässen Maschine sowohl die Abrichtvorgänge als auch die Bearbeitungsvorgänge gesteuert werden. Gegenüber herkömmlichen Maschinen sind dabei mindestens zwei der relativ teuren numerischen Antriebe einsparbar. Im weiteren können Konizitätsausgleiche oder Parallelitätsausrichtungen durch die Schleifscheibe 2 und/oder die Regelscheibe 3 vorgenommen werden. Eine Verstellung, nur entweder auf der Schleifscheibenseite oder auf der Regelscheibenseite bedingt nicht zwangsläufig das Nachjustieren der anderen Seite. Dies, weil die Werkstückauflage 4 in ihrer horizontalen Ebene unverschwenkbar ausgeführt ist. Steuerungstechnische Vorteile resultieren aus dieser Anordnung.A very significant advantage of the machine according to the invention is that the longitudinal or transverse slides 7, 10; 8, 11 can be used not only for feeding the grinding wheel 2 and the regulating wheel 3 to a workpiece to be machined, but also for feeding the grinding wheel 2 to the first dressing device 12 and for feeding the regulating wheel 3 to the second dressing device 13. With four numerically controlled axes X1, Y1, X2, Y2, which in conventional machines alone have to be used to control the two dressing devices, both the dressing processes and the machining processes can be controlled in the machine according to the invention. Compared to conventional machines, at least two of the relatively expensive numerical drives can be saved. In addition, taper compensation or parallelism alignments can be carried out by the grinding wheel 2 and / or the regulating wheel 3. An adjustment, either on the grinding wheel side or on the regulating wheel side, does not necessarily mean that the other side has to be readjusted. This is because the workpiece support 4 is designed to be non-pivotable in its horizontal plane. Control-related advantages result from this arrangement.

Das Programmieren der Maschine erfolgt über ein Steuertableau 22, das mit Elektronikschränken 21 der elektronischen Steuerung über einen Kabelkanal 44 verbunden ist.The machine is programmed via a control panel 22, which is connected to electronic cabinets 21 of the electronic control system via a cable channel 44.

Selbstverständlich ist es möglich, die vorgängig beispielsweise genannten Einstellknöpfe 45 und 46 für die Höheneinstellung A1 des Auflagekörpers der Maschine ebenfalls durch einen weiteren numerisch gesteuerten Antrieb zu ersetzen.Of course it is possible to do that beforehand for example, to set the adjustment buttons 45 and 46 for the height adjustment A1 of the support body of the machine by a further numerically controlled drive.

Ebenfalls die vertikale Neigungseinstellung V2 der Regelscheibe 3 kann wahlweise manuell oder durch einen zusätzlichen numerisch gesteuerten betrieb erfolgen. Eine Schutzhaube 53 überdeckt das Maschinenbett mit den darauf vorhandenen Schleif- und Regelscheibenanordnungen.The vertical inclination setting V2 of the regulating wheel 3 can also be carried out either manually or by an additional numerically controlled operation. A protective hood 53 covers the machine bed with the grinding and regulating wheel arrangements thereon.

Die der Maschine zugeordnete elektronische Steuerung 21, 22 kann unter anderem ebenfalls zum Berechnen der Regelscheibenkontur und zum Erzeugen der letzteren durch die zweite Abrichtvorrichtung 13 benutzt werden. Da die Abrichtung der Regelscheibe auf Zentrumshöhe erfolgt, ist eine Umrechnung der zu erzeugenden Regelscheibenkontur in Funktion der Höhenlage sowie des Durchmessers eines zu bearbeitenden Werkstückes und der Neigung der Regelscheibe notwendig. Diese Umrechnung muss erfolgen, weil ein Werkstück meistens oberhalb der Zentrumshöhe 16 der Regel- und der Schleifscheibe bearbeitet wird, während die Abrichtung der Regelscheibe auf Zentrumshöhe erfolgt. Ohne Umrechnung ergäbe sich eine Verzerrung der Regelscheibenkontur.The electronic control 21, 22 assigned to the machine can also be used, among other things, to calculate the control wheel contour and to generate the latter by the second dressing device 13. Since the control wheel is aligned to the center height, it is necessary to convert the control wheel contour to be generated as a function of the altitude, the diameter of a workpiece to be machined and the inclination of the control wheel. This conversion must take place because a workpiece is usually machined above the center height 16 of the regulating and grinding wheels, while the regulation wheel is aligned to the center height. Without conversion, there would be a distortion of the regulating wheel contour.

Die in diesem Beispiel gezeigte Ausführungsform der erfindungsgemässen spitzenlosen Rundschleifmaschine ist bis zu Antriebsleistungen der Schleifscheibe von ca. 9 kW geeignet. Die Bearbeitungsdurchmesser der Werkstücke liegen vorteilhafterweise unterhalb von etwa 15 mm. Durch entsprechend angepasste und verstärkte Konstruktionen wären natürlich auch grössere Maschinen, die die erfindungsgemässen Merkmale aufweisen, herstell- und einsetzbar.The embodiment of the centerless cylindrical grinding machine according to the invention shown in this example is suitable for drive powers of the grinding wheel of approximately 9 kW. The machining diameters of the workpieces are advantageously below about 15 mm. Appropriately adapted and reinforced constructions would of course also make and use larger machines which have the features according to the invention.

Es soll ausdrücklich vermerkt sein, dass wegen der im wesentlichen gleichen Anordnung sowohl der Schleifscheibe 2 als auch der Regelscheibe 3 an der Maschine, Konstruktionsmerkmale, die im vorliegenden Beispiel im Zusammenhang mit der Schleifscheibe beschrieben worden sind, im gleichen Sinne entweder auch auf der Regelscheibenseite vorhanden sein könnten und umgekehrt.It should be expressly noted that because of the essentially the same arrangement of both the grinding wheel 2 and the regulating wheel 3 on the machine, design features which have been described in connection with the grinding wheel in the present example could either be present on the regulating wheel side in the same sense and vice versa.

Es wird auf die parallele Anmeldung EP-A-448 509 hingewiesen.Attention is drawn to the parallel application EP-A-448 509.

Claims (11)

  1. Centreless cylindrical grinding machine with a base (1), a grinding wheel (2), a regulating wheel (3), which in the longitudinal direction is disposed spaced to the grinding wheel, as well as a workpiece support (4) between the wheels (2, 3) to hold a workpiece to be machined, there being provided at least a first plate (5) pivotable around a vertical axis (6), on which is disposed a first longitudinal carriage (7) shiftable in longitudinal direction of the machine, characterized in that the work support (4) is disposed on the base (1) stationary in the longitudinal and transverse direction, in that on the first longitudinal carriage a first cross carriage (8) is provided at a right angle to the longitudinal direction, shiftable in a transverse direction , and in that the grinding wheel (2) is disposed on the first cross carriage (8).
  2. Machine according to claim 1, characterized in that a second plate (9) is provided pivotable around a further vertical pivot axis (24), in that on the second pivotable plate (9) a second longitudinal carriage (10) shiftable in the longitudinal direction is provided and on this a second cross carriage (11) shiftable in the transverse direction, and in that the regulating wheel (3) is disposed on the second cross carriage (11).
  3. Machine according to claim 1 or 2, characterized in that the pivot axis (6) of the first plate (5) is disposed in the area of the grinding wheel (2) and running preferably concentrically through the workpiece support (4).
  4. Machine according to claim 2 or 3, characterized in that each of the carriages has a numerically controlled axis for shifting each of the first and second longitudinal (7, 10) or cross carriages (8, 11), respectively.
  5. Machine according to one of the claims 1 to 4, characterized in that the work support (4) is disposed adjustable in height only.
  6. Machine according to claim 4 or 5, characterized in that the numerically controlled axis of the first cross carriage (8) serves as the oscillatory axis for carrying out periodical alternate motions of the grinding wheel (2) in the transverse direction of the machine.
  7. Machine according to one of the claims 1 to 6, characterized in that a driving motor (39) for the grinding wheel (2) is disposed on the first longitudinal carriage (7), and in that driving transmission means (27, 28) are provided which permit a relative shifting of the grinding wheel (7) <sic. (2)> in transverse direction to the driving motor.
  8. Machine according to one of the claims 1 to 7, characterized in that the regulating wheel (3) is driven by a continuously controllable servomotor (18), and in that the servomotor is coupled to the axis (19) of the regulating wheel (3) via a synchronous belt (20).
  9. Machine according to one of the claims 2 to 8,. characterized in that a first wheel trueing attachment (12) is connected to the first pivotable plate (5) and a second wheel trueing attachment (13) to the second pivotable plate (9), in each case stationary, and in that each of the wheel trueing attachments (12, 13) comprises a wheel trueing element (14, 15), which is disposed at center height (16) of the grinding (2) or regulating wheel (3), respectively.
  10. Machine according to claim 9, characterized in that the first longitudinal carriage (7) and the first cross carriage (8) serve both to set the grinding wheel (2) to a workpiece to be machined as well as to set the latter to the first wheel trueing attachment (12), and in that the second longitudinal carriage (10) and the second cross carriage (11) serve both to set the regulating wheel (3) to a workpiece to be machined as well as to set the latter to the second wheel trueing attachment (13).
  11. Machine according to claim 9 or 10, characterized in that an electronic control system (21, 22) is associated and in that the control system (21, 22) serves, among other things, to calculate and generate the regulatory wheel profile (23) for the second wheel trueing attachment (13) working at the center height of the regulating wheel (3) as a function of a workpiece position, a workpiece diameter and the inclination of the regulating wheel (3).
EP91810118A 1990-03-23 1991-02-22 Centreless cylindrical grinding machine Expired - Lifetime EP0449767B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91810118T ATE92824T1 (en) 1990-03-23 1991-02-22 CENTERLESS CYLINDRICAL GRINDING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH97590 1990-03-23
CH975/90 1990-03-23

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EP0449767A1 EP0449767A1 (en) 1991-10-02
EP0449767B1 true EP0449767B1 (en) 1993-08-11

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AT (1) ATE92824T1 (en)
DE (1) DE59100270D1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0616870A1 (en) * 1993-03-23 1994-09-28 Agathon A.G. Maschinenfabrik Centerless grinding machine for surface of revolution
DE19940686A1 (en) * 1999-08-27 2001-03-01 Mikrosa Werkzeugmaschinen Gmbh Method and device for CNC-controlled dressing of a regulating wheel of a grinding machine for a centerless grinding process on a workpiece, method for centerless grinding and a grinding machine
DE19940687A1 (en) 1999-08-27 2001-03-01 Mikrosa Werkzeugmaschinen Gmbh Grinding machines for centerless grinding of workpieces
CH694940A5 (en) * 2000-11-03 2005-09-30 Urs Tschudin Centreless grinding machine.
DE102011117819B4 (en) 2011-11-02 2017-11-02 Schaudt Mikrosa Gmbh Centerless cylindrical grinding machine
DE102014014877A1 (en) * 2014-10-13 2016-04-14 Hans-Wilhelm Modler A centerless cylindrical grinding apparatus and method of using a centerless cylindrical grinding apparatus
DE102014115149B3 (en) * 2014-10-17 2016-01-21 Schaudt Mikrosa Gmbh Grinding machine, in particular compact designed centerless grinder
ES2726707T3 (en) 2016-07-12 2019-10-08 Tschudin GmbH Grenchen Procedure and simultaneous cylindrical grinding device without points of several work pieces
CN110549176A (en) * 2019-10-09 2019-12-10 浙江立群汽车配件制造有限公司 dedicated centerless cylindrical grinder of cross axle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2466478A (en) * 1946-03-13 1949-04-05 James A Riley Grinding machine
GB981609A (en) * 1960-04-18 1965-01-27 Earl A Thompson Mfg Company Improvements in or relating to workpiece feed mechanisms

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EP0449767A1 (en) 1991-10-02
DE59100270D1 (en) 1993-09-16
ATE92824T1 (en) 1993-08-15

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