EP2676770A1 - Device for fine finishing or superfinishing a rotation-symmetric area of a workpiece - Google Patents

Device for fine finishing or superfinishing a rotation-symmetric area of a workpiece Download PDF

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Publication number
EP2676770A1
EP2676770A1 EP12172414.0A EP12172414A EP2676770A1 EP 2676770 A1 EP2676770 A1 EP 2676770A1 EP 12172414 A EP12172414 A EP 12172414A EP 2676770 A1 EP2676770 A1 EP 2676770A1
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EP
European Patent Office
Prior art keywords
workpiece
pressure roller
drive
axis
rotation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12172414.0A
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German (de)
French (fr)
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EP2676770B1 (en
Inventor
Jürgen Roser
Walter Armbruster
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Supfina Grieshaber GmbH and Co KG
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Supfina Grieshaber GmbH and Co KG
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Priority to EP20120172414 priority Critical patent/EP2676770B1/en
Publication of EP2676770A1 publication Critical patent/EP2676770A1/en
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Publication of EP2676770B1 publication Critical patent/EP2676770B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
    • B24B5/047—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally of workpieces turning about a vertical axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
    • B24B19/06—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements for grinding races, e.g. roller races
    • 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
    • B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/061—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically
    • 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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/10—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving electrical means
    • 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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/12—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving optical means

Definitions

  • the invention relates to a device for fine or Feinstbearbeitung a rotationally symmetrical workpiece surface of a workpiece, having a drive means for driving the workpiece about a rotation axis, with respect to the axis of rotation in the radial directions effective guide means and an effective in a radial direction tool having a pressure rollers Pressing device for pressing the workpiece against a drive element of the drive device, wherein the workpiece viewed in the direction of the axis of rotation between the drive element and the pressure rollers can be arranged.
  • Such a device is for example from the EP 2 218 545 A1 known.
  • the fine or The finest machining of a rotationally symmetrical workpiece surface of a workpiece with a radial clamping involves the problem that rotationally symmetrical workpiece surfaces can be damaged by contact with the clamping tool.
  • devices of the type mentioned above are used. In these devices, the workpieces are not clamped radially but axially.
  • a workpiece viewed in the direction of the axis of rotation between a drive element of a drive device and the pressure rollers of a pressing device is fixed and guided in the radial direction by means of further guide means.
  • the present invention has the object to improve a device of the type mentioned so that unwanted operating states of the device can be detected as easily and quickly.
  • a detection device for detecting a movement of at least one pressure roller is provided.
  • the device according to the invention makes it possible in a simple manner to detect undesired operating states can. According to the invention it has been recognized that it is sufficient to detect a movement of at least one pressure roller to determine whether the workpiece is offset by the drive means in a desired rotational movement or whether the rotational movement of the workpiece is disturbed.
  • the invention is based on the idea that a drive movement of the drive means are transmitted to the pressure rollers via the workpiece.
  • a disturbance within the drive train and / or in the region of contact between the drive element and the workpiece and / or in the region of contact between the workpiece and the pressure rollers can be detected without individual monitoring of individual components of the drive train or individual contact areas is required.
  • the monitoring is done so to speak "in the last term" of the motion transmission.
  • This also has the advantage that the detection device can be arranged in a construction space outside the drive train and outside the workpiece, so that no reconfiguration of essential parts of the device is required for the purposes of monitoring the device.
  • the detection device comprises a motion sensor for detecting a rotational movement of the pressure roller about a pressure roller axis.
  • a motion sensor for detecting a rotational movement of the pressure roller about a pressure roller axis.
  • the pressure roller has a reference section communicating with the motion sensor, which in particular separately is provided by the running surface of the pressure roller.
  • a reference section is, for example, a perforated disc provided with markings or interruptions, which is aligned perpendicular to the pressure roller axis or also around a cylindrical reference surface, for example, which rotates together with the running surface of the pressure roller about the pressure roller axis and whose markings or openings are by means of a in particular optical motion sensor can be detected.
  • motion sensors which have a magnetic, inductive or capacitive action principle.
  • the detection device comprises an acceleration sensor for detecting a position and / or position change of the pressure roller. If such an acceleration sensor is used, results in a particularly simple detection device, which is very variable with respect to pressure rollers and workpieces with different geometries and sizes can be used.
  • the acceleration sensor comprises the movement of a pressure roller as a whole, ie, its position and / or position change, which the pressure roller experiences during operation of the device.
  • the position and / or position changes are, in particular, oscillatory movements of the pressure roller.
  • the motion sensor and / or the acceleration sensor is arranged in or on a carrier for mounting the pressure roller.
  • a motion sensor this has the advantage that it can be dispensed with a separate holder for holding the motion sensor.
  • an acceleration sensor has the advantage that the movement of the pressure roller is not influenced by the acceleration sensor itself, but rather a position and / or position change of the pressure roller can be detected by a movement of at least a portion of the carrier. This also has the advantage that when changing a pressure roller, either for reasons of wear or due to a workpiece geometry change, the acceleration sensor can remain on the carrier and no conversion is required.
  • the drive device comprises a motor and a spindle driven by the motor for driving the drive element.
  • Disturbances or interruptions in such a drive train can also be detected by means of the detection device according to the invention.
  • Disturbances of a clutch for the switchable connection of a force flow between a motor and the drive element of the drive device can also be detected.
  • the device has a removal device for removing a machined workpiece and / or a malfunction warning device and that the removal device and / or the malfunction warning device can be actuated or are dependent on a movement of the pressure roller detected by the detection device.
  • the motion signals of the pressure roller determined by means of the detection device can be evaluated in such a way that a warning is output when there is a deviation from a desired state. It is also possible to conclude from the deviation from a nominal state that a workpiece is not or not finished has been machined to block the removal of a (unfinished) workpiece.
  • the invention further relates to a method for operating a device as described above.
  • the present invention has the further object of specifying a method with which unwanted operating states of a device described above can be detected as simply and quickly as possible.
  • This object is achieved in a method for operating a device described above according to the invention that at a first speed of a motor of the drive means first acceleration values of a position and / or position change of the pressure roller and at a deviating from the first speed second speed second acceleration values of a position - And / or change in position of the pressure roller are detected and that falls below a predetermined minimum difference between the first and second acceleration values, a removal device for removing a machined workpiece disabled and / or a fault warning device is activated.
  • This method allows a particularly simple monitoring with regard to malfunction of the device.
  • different speeds of rotation of a motor of the drive device not only (in trouble-free operation) associated with a certain speed of the pressure roller to a pressure roller axis, but also with certain acceleration values of the position and / or change in position of the pressure roller.
  • acceleration values and speed of the motor are not required. It is sufficient to be able to correlate at least two different speeds with two different acceleration values.
  • a standstill of the motor is associated with very low acceleration values, which result from the "background noise" of the environment of the device (for example, vibrations of the footprint).
  • the "background noise" of the environment of the device for example, vibrations of the footprint.
  • At a low speed of the motor higher acceleration values and at a higher speed of the motor further increased acceleration values are to be expected.
  • FIG. 1 an embodiment of a device for fine or ultra-fine machining of a workpiece is generally designated by the reference numeral 10.
  • the device 10 comprises a drive device, generally designated by the reference numeral 12, for driving a workpiece 14 about an axis of rotation 16.
  • the workpiece 14 has a rotationally symmetrical workpiece surface 18, which can be subjected by means of a workpiece 20 to a fine or superfine machining, in particular a finish machining.
  • guide means 22 are provided, which are arranged distributed in the circumferential direction around the workpiece 14.
  • the guide means 22 have, for example, on a radially outwardly facing workpiece surface of the workpiece 14 adjacent guide rollers 24.
  • the drive device 12 comprises a motor 26 which rotatably drives a spindle end 32 via a spindle 28 and via an optionally provided coupling 30.
  • the spindle end 32 is connected to a top 34, which may also be referred to as a "face plate”.
  • the attachment 34 is in turn rotatably connected to a drive element 36, which may also be referred to as a "driver”.
  • the drive element 36 has a support surface for supporting a first end face (without reference numeral) of the workpiece 14.
  • the workpiece 14 has a drive element 36 facing away from the second end face 38, which is acted upon by a generally designated by the reference numeral 40 pressure device.
  • the pressing device 40 comprises a clamping device 42, by means of which a carrier 44 can be acted upon in a direction parallel to the axis of rotation 16 in the direction of the end face 38 of the workpiece 14 with a pressing force.
  • the carrier 44 has at its end facing the workpiece 14 at least one pressure roller 46, preferably a plurality of pressure rollers 46, on.
  • the pressure rollers 46 are rotatable about each associated Andschreibrollenachsen 48. A rotational movement of the pressure rollers 46 about the pressure roller axes 48 is accompanied by a rolling of the running surfaces 50 on the end face 38 of the workpiece 14.
  • the drive element 36 of the drive device 20 When machining the workpiece 14 by means of the tool 20, the drive element 36 of the drive device 20 is set in a rotational movement. Via a frictional connection with the first end face of the workpiece 14, the workpiece 14 is set in a rotational movement about the axis of rotation 16. About the frictional engagement between the running surface 50 of a pressure roller 46 and the end face 38 of the workpiece 14, the pressure rollers are rotated. The movements described above are also associated with a slight change in position and / or position of the pressure rollers 46.
  • the device 10 comprises a detection device 52 for detecting at least one of the aforementioned types of movement of the pressure roller 46.
  • the detection device may comprise an acceleration sensor 54.
  • the acceleration sensor 54 is rigidly connected to a material portion 56 of the carrier 44, which simultaneously serves to support the pressure rollers 46.
  • the device 10 comprises a schematically illustrated malfunction warning device 58 (for example a warning light), a removal device 60 for removing a machined workpiece 14 (for example a gripper) and a control device 62 for controlling the malfunction warning device 58 and / or the removal device 60 as a function of Detection device 52 obtained motion signals of the pressure rollers 46th
  • a schematically illustrated malfunction warning device 58 for example a warning light
  • a removal device 60 for removing a machined workpiece 14
  • a control device 62 for controlling the malfunction warning device 58 and / or the removal device 60 as a function of Detection device 52 obtained motion signals of the pressure rollers 46th
  • FIGS. 2 to 4 Diagrams shown have a time axis 64 with time values and a value axis with acceleration values.
  • the in the FIGS. 2 to 4 shown measuring lines 68 represent acceleration values, which along a time course by means of Detection device 52 can be detected when the drive device 12 is operated in two different operating states.
  • first acceleration values 70 which have a comparatively low level, which corresponds to a "noise floor" of the device 10 and the environment of the device 10. For example, these values correspond to approximately 0.03 times the gravitational acceleration.
  • the drive device 12 is brought into a second state, for example into a state in which the motor 26 is operated at a speed of 100 rpm, higher second acceleration values 72 (for example in the amount of approximately 0.1 G).
  • the difference between the first acceleration values 70 and 72 is large enough to be able to determine that the motor 26 is operating and produces a desired movement of the pressure rollers 46, notwithstanding the stoppage of the motor 26.
  • FIG. 3 2 is a diagram for the example of a motor 26 which is brought to a standstill starting from an operating state at 60 rpm.
  • first acceleration values 70 in the amount of, for example, approximately 0.04 g
  • second acceleration values in the amount of, for example, approximately 0.03 g
  • first acceleration values 70 (of the order of 0.05 g, for example) and second acceleration values 72 (of the order of, for example, 0.55 g), which are associated with a transfer of a first engine speed of the engine 26 correspond to a second speed of the motor 26.
  • the engine 26 is first operated at 80 rpm and then (from the time 13:17:10) at 350 rpm.
  • the first acceleration values 70 and the second acceleration values 72 can thus be compared with one another for different operating states of the engine 26. If a difference is lower than a predefinable minimum difference (which can be stored, for example, in the control device 62), it is possible to infer a disturbance in the drive device 12 of the device 10 and / or in a contact region of the workpiece 14 and activate the disturbance warning device 58 and / or the removal device 60 are disabled.
  • a predefinable minimum difference which can be stored, for example, in the control device 62

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The device (10) has a drive unit (12) for driving a workpiece (14) about an axis of rotation (16), guiding units (22) operative in radial directions with respect to the axis of rotation, and a tool operative in a radial direction. A pressing unit (40) is provided with a press roll (46) for pressing the workpiece (20) against a drive element (36) of the drive unit. The workpiece is arranged between the drive element and the press roll. A detection unit (52) is provided for detecting the movement of the press roll. An independent claim is included for a method for operating a device for fine finishing or superfinishing of a rotationally symmetrical workpiece surface of a workpiece.

Description

Die Erfindung betrifft eine Vorrichtung zur Fein- oder Feinstbearbeitung einer rotationssymmetrischen Werkstückfläche eines Werkstücks, mit einer Antriebseinrichtung zum Antrieb des Werkstücks um eine Rotationsachse, mit bezogen auf die Rotationsachse in radialen Richtungen wirksamen Führungseinrichtungen und einem in einer radialer Richtung wirksamen Werkzeug, mit einer Andrückrollen aufweisenden Andrückeinrichtung zum Andrücken des Werkstücks gegen ein Antriebselement der Antriebseinrichtung, wobei das Werkstück in Richtung der Rotationsachse gesehen zwischen dem Antriebselement und den Andrückrollen anordenbar ist.The invention relates to a device for fine or Feinstbearbeitung a rotationally symmetrical workpiece surface of a workpiece, having a drive means for driving the workpiece about a rotation axis, with respect to the axis of rotation in the radial directions effective guide means and an effective in a radial direction tool having a pressure rollers Pressing device for pressing the workpiece against a drive element of the drive device, wherein the workpiece viewed in the direction of the axis of rotation between the drive element and the pressure rollers can be arranged.

Eine solche Vorrichtung ist beispielsweise aus der EP 2 218 545 A1 bekannt. Bei der Fein- oder Feinstbearbeitung einer rotationssymmetrischen Werkstückfläche eines Werkstücks besteht bei einer radialen Einspannung das Problem, dass rotationssymmetrische Werkstückflächen durch Kontakt mit dem Spannwerkzeug beschädigt werden können. Um dies zu verhindern, werden Vorrichtungen der vorstehend genannten Art verwendet. Bei diesen Vorrichtungen werden die Werkstücke nicht radial sondern axial eingespannt. Hierbei ist ein Werkstück in Richtung der Rotationsachse gesehen zwischen einem Antriebselement einer Antriebseinrichtung und den Andrückrollen einer Andrückeinrichtung fixiert und in radialer Richtung mit Hilfe weiterer Führungseinrichtungen geführt.Such a device is for example from the EP 2 218 545 A1 known. In the fine or The finest machining of a rotationally symmetrical workpiece surface of a workpiece with a radial clamping involves the problem that rotationally symmetrical workpiece surfaces can be damaged by contact with the clamping tool. To prevent this, devices of the type mentioned above are used. In these devices, the workpieces are not clamped radially but axially. Here, a workpiece viewed in the direction of the axis of rotation between a drive element of a drive device and the pressure rollers of a pressing device is fixed and guided in the radial direction by means of further guide means.

Bei der vorstehend beschriebenen Fixierung des Werkstücks stehen einander abgewandte Stirnseiten des Werkstücks in Reibkontakt mit einer Andrückfläche des Antriebselement bzw. mit Laufflächen der Andrückrollen. Um eine Beschädigung der Stirnseiten zu verhindern, ist es erforderlich, Stillstände des Werkstücks oder stick-slip-Effekte zu vermeiden.In the above-described fixation of the workpiece facing away from each other end faces of the workpiece in frictional contact with a pressing surface of the drive element or with running surfaces of the pressure rollers. In order to prevent damage to the end faces, it is necessary to avoid stoppages of the workpiece or stick-slip effects.

Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art so zu verbessern, dass unerwünschte Betriebszustände der Vorrichtung möglichst einfach und schnell detektiert werden können.On this basis, the present invention has the object to improve a device of the type mentioned so that unwanted operating states of the device can be detected as easily and quickly.

Diese Aufgabe wird bei einer Vorrichtung der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass eine Erfassungseinrichtung zur Erfassung einer Bewegung mindestens einer Andrückrolle vorgesehen ist.This object is achieved in a device of the type mentioned in the present invention, that a detection device for detecting a movement of at least one pressure roller is provided.

Die erfindungsgemäße Vorrichtung ermöglicht es auf einfache Art und Weise, unerwünschte Betriebszustände detektieren zu können. Erfindungsgemäß wurde erkannt, dass es genügt, eine Bewegung mindestens einer Andrückrolle zu erfassen, um feststellen zu können, ob das Werkstück mittels der Antriebseinrichtung in eine gewünschte Rotationsbewegung versetzt wird oder ob die Rotationsbewegung des Werkstücks gestört ist.The device according to the invention makes it possible in a simple manner to detect undesired operating states can. According to the invention it has been recognized that it is sufficient to detect a movement of at least one pressure roller to determine whether the workpiece is offset by the drive means in a desired rotational movement or whether the rotational movement of the workpiece is disturbed.

Der Erfindung liegt die Idee zugrunde, dass eine Antriebsbewegung der Antriebseinrichtung über das Werkstück auf die Andrückrollen übertragen werden. Somit kann eine Störung innerhalb des Antriebsstrangs und/oder im Bereich des Kontakts zwischen dem Antriebselement und dem Werkstück und/oder im Bereich des Kontakts zwischen dem Werkstück und den Andrückrollen detektiert werden, ohne dass eine Einzelüberwachung einzelner Komponenten des Antriebsstrangs oder einzelner Kontaktbereiche erforderlich ist. Die Überwachung erfolgt sozusagen "im letzten Glied" der Bewegungsübertragung. Dies hat auch den Vorteil, dass die Erfassungseinrichtung in einem Bauraum außerhalb des Antriebsstrangs und außerhalb des Werkstücks anordenbar ist, sodass für die Zwecke einer Überwachung der Vorrichtung keine Umkonstruktion von wesentlichen Teilen der Vorrichtung erforderlich ist.The invention is based on the idea that a drive movement of the drive means are transmitted to the pressure rollers via the workpiece. Thus, a disturbance within the drive train and / or in the region of contact between the drive element and the workpiece and / or in the region of contact between the workpiece and the pressure rollers can be detected without individual monitoring of individual components of the drive train or individual contact areas is required. The monitoring is done so to speak "in the last term" of the motion transmission. This also has the advantage that the detection device can be arranged in a construction space outside the drive train and outside the workpiece, so that no reconfiguration of essential parts of the device is required for the purposes of monitoring the device.

Im Rahmen der Erfindung ist es möglich, dass die Erfassungseinrichtung einen Bewegungssensor zur Erfassung einer Drehbewegung der Andrückrolle um eine Andrückrollenachse umfasst. Mit einem solchen Bewegungssensor kann das Abwälzen einer Andrückrolle auf einer Kontaktfläche des Werkstücks erfasst werden.In the context of the invention, it is possible that the detection device comprises a motion sensor for detecting a rotational movement of the pressure roller about a pressure roller axis. With such a motion sensor, the rolling of a pressure roller on a contact surface of the workpiece can be detected.

Zur einfachen Erfassung einer Drehbewegung der Andrückrolle um eine Andrückrollenachse ist es bevorzugt, wenn die Andrückrolle einen mit dem Bewegungssensor kommunizierenden Referenzabschnitt aufweist, welcher insbesondere separat von der Lauffläche der Andrückrolle vorgesehen ist. Bei einem solchen Referenzabschnitt handelt es sich beispielsweise um eine mit Markierungen oder Unterbrechungen versehene Lochscheibe, welche zu der Andrückrollenachse senkrecht ausgerichtet ist oder auch um eine beispielsweise zylindrische Referenzfläche, welche gemeinsam mit der Lauffläche der Andrückrolle um die Andrückrollenachse rotiert und deren Markierungen oder Öffnungen mittels eines insbesondere optischen Bewegungssensors erfasst werden können.For easy detection of a rotational movement of the pressure roller about a pressure roller axis, it is preferred if the pressure roller has a reference section communicating with the motion sensor, which in particular separately is provided by the running surface of the pressure roller. Such a reference section is, for example, a perforated disc provided with markings or interruptions, which is aligned perpendicular to the pressure roller axis or also around a cylindrical reference surface, for example, which rotates together with the running surface of the pressure roller about the pressure roller axis and whose markings or openings are by means of a in particular optical motion sensor can be detected.

Es können auch Bewegungssensoren eingesetzt werden, welche ein magnetisches, induktives oder kapazitives Wirkprinzip haben.It can also be used motion sensors, which have a magnetic, inductive or capacitive action principle.

Bei einer besonders bevorzugten Ausführung der Erfindung umfasst die Erfassungseinrichtung einen Beschleunigungssensor zur Erfassung einer Positions- und/oder Lageänderung der Andrückrolle. Wenn ein solcher Beschleunigungssensor verwendet wird, ergibt sich eine besonders einfach aufgebaute Erfassungseinrichtung, welche sehr variabel im Hinblick auf Andrückrollen und Werkstücke mit unterschiedlichen Geometrien und Größen einsetzbar ist. Der Beschleunigungssensor umfasst die Bewegung einer Andrückrolle insgesamt, also deren Positions- und/oder Lageänderung, welche die Andrückrolle während des Betriebs der Vorrichtung erfährt. Bei den Postions- und/oder Lageänderungen handelt es sich insbesondere um Schwingungsbewegungen der Andrückrolle.In a particularly preferred embodiment of the invention, the detection device comprises an acceleration sensor for detecting a position and / or position change of the pressure roller. If such an acceleration sensor is used, results in a particularly simple detection device, which is very variable with respect to pressure rollers and workpieces with different geometries and sizes can be used. The acceleration sensor comprises the movement of a pressure roller as a whole, ie, its position and / or position change, which the pressure roller experiences during operation of the device. The position and / or position changes are, in particular, oscillatory movements of the pressure roller.

Bevorzugt ist es, wenn der Bewegungssensor und/oder der Beschleunigungssensor in oder an einem Träger zur Lagerung der Andrückrolle angeordnet ist. Für einen Bewegungssensor hat dies den Vorteil, dass auf einen separaten Halter zum Halten des Bewegungssensors verzichtet werden kann. Für einen Beschleunigungssensor ergibt sich der Vorteil, dass die Bewegung der Andrückrolle nicht durch den Beschleunigungssensor selbst beeinflusst wird, sondern vielmehr eine Positions- und/oder Lageänderung der Andrückrolle durch eine Bewegung zumindest eines Teilabschnitts des Trägers erfasst werden kann. Dies hat auch den Vorteil, dass bei Wechsel einer Andrückrolle, sei es aus Verschleißgründen oder aufgrund eines Werkstückgeometriewechsels, der Beschleunigungssensor an dem Träger verbleiben kann und keine Umrüstung erforderlich ist.It is preferred if the motion sensor and / or the acceleration sensor is arranged in or on a carrier for mounting the pressure roller. For a motion sensor this has the advantage that it can be dispensed with a separate holder for holding the motion sensor. For an acceleration sensor has the advantage that the movement of the pressure roller is not influenced by the acceleration sensor itself, but rather a position and / or position change of the pressure roller can be detected by a movement of at least a portion of the carrier. This also has the advantage that when changing a pressure roller, either for reasons of wear or due to a workpiece geometry change, the acceleration sensor can remain on the carrier and no conversion is required.

In vorteilhafter Weise umfasst die Antriebseinrichtung einen Motor und eine von dem Motor angetriebene Spindel zum Antrieb des Antriebselements. Störungen oder Unterbrechungen in einem solchen Antriebsstrang können mittels der erfindungsgemäßen Erfassungseinrichtung ebenfalls erfasst werden. Es können auch Störungen einer Kupplung zur schaltbaren Verbindung eines Kraftflusses zwischen einem Motor und dem Antriebselement der Antriebseinrichtung erfasst werden.Advantageously, the drive device comprises a motor and a spindle driven by the motor for driving the drive element. Disturbances or interruptions in such a drive train can also be detected by means of the detection device according to the invention. Disturbances of a clutch for the switchable connection of a force flow between a motor and the drive element of the drive device can also be detected.

Bei einer bevorzugten Ausführungsform der Erfindung ist vorgesehen, dass die Vorrichtung eine Entnahmeeinrichtung zur Entnahme eines bearbeiteten Werkstücks und/oder eine Störungswarneinrichtung aufweist und dass die Entnahmeeinrichtung und/oder die Störungswarneinrichtung betätigbar ist oder sind in Abhängigkeit einer mittels der Erfassungseinrichtung erfassten Bewegung der Andrückrolle. Im einfachsten Fall können also die mittels der Erfassungseinrichtung ermittelten Bewegungssignale der Andrückrolle so ausgewertet werden, dass bei Abweichung von einem Sollzustand eine Warnung ausgegeben wird. Es ist auch möglich, aus der Abweichung von einem Sollzustand darauf zu schließen, dass ein Werkstück nicht oder nicht fertig bearbeitet wurde, sodass die Entnahme eines (nicht fertig bearbeiteten) Werkstücks blockiert wird.In a preferred embodiment of the invention, it is provided that the device has a removal device for removing a machined workpiece and / or a malfunction warning device and that the removal device and / or the malfunction warning device can be actuated or are dependent on a movement of the pressure roller detected by the detection device. In the simplest case, therefore, the motion signals of the pressure roller determined by means of the detection device can be evaluated in such a way that a warning is output when there is a deviation from a desired state. It is also possible to conclude from the deviation from a nominal state that a workpiece is not or not finished has been machined to block the removal of a (unfinished) workpiece.

Die Erfindung betrifft ferner ein Verfahren zum Betrieb einer vorstehend beschriebenen Vorrichtung.The invention further relates to a method for operating a device as described above.

Der vorliegenden Erfindung liegt die weitere Aufgabe zugrunde, ein Verfahren anzugeben, mit dem unerwünschte Betriebszustände einer vorstehend beschriebenen Vorrichtung möglichst einfach und schnell detektiert werden können.The present invention has the further object of specifying a method with which unwanted operating states of a device described above can be detected as simply and quickly as possible.

Diese Aufgabe wird bei einem Verfahren zum Betrieb einer vorstehend beschriebenen Vorrichtung erfindungsgemäß dadurch gelöst, dass bei einer ersten Drehzahl eines Motors der Antriebseinrichtung erste Beschleunigungswerte einer Positions- und/oder Lageänderung der Andrückrolle und bei einer von der ersten Drehzahl abweichenden zweiten Drehzahl zweite Beschleunigungswerte einer Positions- und/oder Lageänderung der Andrückrolle erfasst werden und dass bei Unterschreitung einer vorgebbaren Mindestdifferenz zwischen den ersten und den zweiten Beschleunigungswerten eine Entnahmeeinrichtung zur Entnahme eines bearbeiteten Werkstücks deaktiviert und/oder eine Störungswarneinrichtung aktiviert wird.This object is achieved in a method for operating a device described above according to the invention that at a first speed of a motor of the drive means first acceleration values of a position and / or position change of the pressure roller and at a deviating from the first speed second speed second acceleration values of a position - And / or change in position of the pressure roller are detected and that falls below a predetermined minimum difference between the first and second acceleration values, a removal device for removing a machined workpiece disabled and / or a fault warning device is activated.

Dieses Verfahren ermöglicht eine besonders einfache Überwachung im Hinblick auf Betriebsstörungen der Vorrichtung. Erfindungsgemäß wurde erkannt, dass voneinander abweichende Drehzahlen eines Motors der Antriebseinrichtung nicht nur (bei störungsfreiem Betrieb) mit einer bestimmten Drehzahl der Andrückrolle um eine Andrückrollenachse einhergeht, sondern auch mit bestimmten Beschleunigungswerten der Positions- und/oder Lageänderung der Andrückrolle. Hierbei ist eine exakte Korrelierung zwischen Beschleunigungswerten und Drehzahl des Motors nicht erforderlich. Es genügt, mindestens zwei voneinander abweichende Drehzahlen mit jeweils zwei voneinander abweichenden Beschleunigungswerten korrelieren zu können. Beispielsweise geht ein Stillstand des Motors mit sehr niedrigen Beschleunigungswerten einher, welche sich durch das "Grundrauschen" der Umgebung der Vorrichtung (beispielsweise Erschütterungen der Aufstellfläche) ergeben. Bei einer niedrigen Drehzahl des Motors sind höhere Beschleunigungswerte und bei einer höheren Drehzahl des Motors weiter erhöhte Beschleunigungswerte zu erwarten.This method allows a particularly simple monitoring with regard to malfunction of the device. According to the invention it was recognized that different speeds of rotation of a motor of the drive device not only (in trouble-free operation) associated with a certain speed of the pressure roller to a pressure roller axis, but also with certain acceleration values of the position and / or change in position of the pressure roller. Here is an exact correlation between acceleration values and speed of the motor is not required. It is sufficient to be able to correlate at least two different speeds with two different acceleration values. For example, a standstill of the motor is associated with very low acceleration values, which result from the "background noise" of the environment of the device (for example, vibrations of the footprint). At a low speed of the motor higher acceleration values and at a higher speed of the motor further increased acceleration values are to be expected.

Aus einer Differenz der Beschleunigungswerte kann daher auf eine Störung innerhalb des Antriebsstrangs oder in einem Kontaktbereich zum Werkstück geschlossen werden.From a difference of the acceleration values can therefore be concluded that a fault within the drive train or in a contact area to the workpiece.

Weitere Merkmale und Vorteile der Erfindung sind Gegenstand der nachfolgenden Beschreibung und der zeichnerischen Darstellung bevorzugter Ausführungsbeispiele.Further features and advantages of the invention are the subject of the following description and the drawings of preferred embodiments.

In der Zeichnung zeigen:

Figur 1
eine perspektivische Ansicht einer Ausführungsform einer Vorrichtung zur Fein- oder Feinstbearbeitung eines Werkstücks, umfassend eine Antriebseinrichtung zum Antrieb eines Werkstücks um eine Rotationsachse und eine Erfassungseinrichtung zur Erfassung der Bewegung einer Andrückrolle einer Andrückeinrichtung;
Figur 2
ein Diagramm, in welchem durch Positions- und/oder Lageänderung der Andrückrolle anliegende Beschleunigungswerte in einem zeitlichen Verlauf dargestellt sind, wobei die Antriebseinrichtung aus einem ruhenden ersten Zustand in einen zweiten Zustand mit einer zweiten Antriebsdrehzahl überführt wird;
Figur 3
ein der Figur 2 entsprechendes Diagramm, wobei die Antriebseinrichtung aus einem ersten Zustand mit einer ersten Antriebsdrehzahl in einen ruhenden zweiten Zustand überführt wird; und
Figur 4
ein der Figur 2 entsprechendes Diagramm, wobei die Antriebseinrichtung aus einem ersten Zustand mit einer ersten Antriebsdrehzahl in einen zweiten Zustand mit einer zweiten Antriebsdrehzahl überführt wird.
In the drawing show:
FIG. 1
a perspective view of an embodiment of a device for fine or ultra-fine machining of a workpiece, comprising a drive device for driving a workpiece about an axis of rotation and a detection device for detecting the movement of a pressure roller of a pressing device;
FIG. 2
a diagram in which shown by position and / or change in position of the pressure roller acceleration values are shown in a time course, wherein the drive means from a dormant first state in a second state is transferred at a second drive speed;
FIG. 3
one of the FIG. 2 corresponding diagram, wherein the drive means is converted from a first state with a first drive speed in a resting second state; and
FIG. 4
one of the FIG. 2 corresponding diagram, wherein the drive means is transferred from a first state with a first drive speed in a second state with a second drive speed.

In Figur 1 ist eine Ausführungsform einer Vorrichtung zur Fein- oder Feinstbearbeitung eines Werkstücks insgesamt mit dem Bezugszeichen 10 bezeichnet.In FIG. 1 an embodiment of a device for fine or ultra-fine machining of a workpiece is generally designated by the reference numeral 10.

Die Vorrichtung 10 umfasst eine insgesamt mit dem Bezugszeichen 12 bezeichnete Antriebseinrichtung zum Antrieb eines Werkstücks 14 um eine Rotationsachse 16.The device 10 comprises a drive device, generally designated by the reference numeral 12, for driving a workpiece 14 about an axis of rotation 16.

Das Werkstück 14 weist eine rotationssymmetrische Werkstückfläche 18 auf, welche mittels eines Werkstücks 20 einer Fein- oder Feinstbearbeitung, insbesondere einer Finishbearbeitung, unterzogen werden kann.The workpiece 14 has a rotationally symmetrical workpiece surface 18, which can be subjected by means of a workpiece 20 to a fine or superfine machining, in particular a finish machining.

Um vermeiden, dass das Werkstück 14 in bezogen auf die Rotationsachse 16 seitlicher Richtung auswandert, sind Führungseinrichtungen 22 vorgesehen, welche in Umfangsrichtung um das Werkstück 14 verteilt angeordnet sind. Die Führungseinrichtung 22 weisen beispielsweise an einer nach radial außen weisenden Werkstückfläche des Werkstücks 14 anliegende Führungsrollen 24 auf.To avoid that the workpiece 14 emigrates in relation to the axis of rotation 16 lateral direction, guide means 22 are provided, which are arranged distributed in the circumferential direction around the workpiece 14. The guide means 22 have, for example, on a radially outwardly facing workpiece surface of the workpiece 14 adjacent guide rollers 24.

Die Antriebseinrichtung 12 umfasst einen Motor 26, welcher über eine Spindel 28 und über eine optional vorgesehene Kupplung 30 ein Spindelende 32 rotierend antreibt. Das Spindelende 32 ist mit einem Aufsatz 34 verbunden, welcher auch als "Planscheibe" bezeichnet werden kann.The drive device 12 comprises a motor 26 which rotatably drives a spindle end 32 via a spindle 28 and via an optionally provided coupling 30. The spindle end 32 is connected to a top 34, which may also be referred to as a "face plate".

Der Aufsatz 34 ist seinerseits mit einem Antriebselement 36 drehfest verbunden, welches auch als "Treiber" bezeichnet werden kann.The attachment 34 is in turn rotatably connected to a drive element 36, which may also be referred to as a "driver".

Das Antriebselement 36 weist eine Auflagefläche zur Auflage einer ersten Stirnfläche (ohne Bezugszeichen) des Werkstücks 14 auf.The drive element 36 has a support surface for supporting a first end face (without reference numeral) of the workpiece 14.

Das Werkstück 14 weist eine dem Antriebselement 36 abgewandte zweite Stirnfläche 38 auf, welche von einer insgesamt mit dem Bezugszeichen 40 bezeichneten Andrückeinrichtung beaufschlagt wird.The workpiece 14 has a drive element 36 facing away from the second end face 38, which is acted upon by a generally designated by the reference numeral 40 pressure device.

Die Andrückeinrichtung 40 umfasst eine Spanneinrichtung 42, mittels welcher ein Träger 44 in einer zu der Rotationsachse 16 parallelen Richtung in Richtung auf die Stirnfläche 38 des Werkstücks 14 mit einer Andrückkraft beaufschlagbar ist.The pressing device 40 comprises a clamping device 42, by means of which a carrier 44 can be acted upon in a direction parallel to the axis of rotation 16 in the direction of the end face 38 of the workpiece 14 with a pressing force.

Der Träger 44 weist an seinem dem Werkstück 14 zugewandten Ende mindestens eine Andrückrolle 46, vorzugsweise eine Mehrzahl von Andrückrollen 46, auf. Die Andrückrollen 46 sind um jeweils zugeordnete Andrückrollenachsen 48 drehbar. Eine Drehbewegung der Andrückrollen 46 um die Andrückrollenachsen 48 geht mit einem Abwälzen der Laufflächen 50 auf der Stirnfläche 38 des Werkstücks 14 einher.The carrier 44 has at its end facing the workpiece 14 at least one pressure roller 46, preferably a plurality of pressure rollers 46, on. The pressure rollers 46 are rotatable about each associated Andrückrollenachsen 48. A rotational movement of the pressure rollers 46 about the pressure roller axes 48 is accompanied by a rolling of the running surfaces 50 on the end face 38 of the workpiece 14.

Bei einer Bearbeitung des Werkstücks 14 mittels des Werkzeugs 20 wird das Antriebselement 36 der Antriebseinrichtung 20 in eine Drehbewegung versetzt. Über einen Reibschluss mit der ersten Stirnfläche des Werkstücks 14 wird das Werkstück 14 in eine Drehbewegung um die Rotationsachse 16 versetzt. Über den Reibschluss zwischen der Lauffläche 50 einer Andrückrolle 46 und der Stirnfläche 38 des Werkstücks 14 werden die Andrückrollen in eine Drehbewegung versetzt. Die vorstehend beschriebenen Bewegungen gehen auch mit einer geringfügigen Lage- und/oder Positionsänderung der Andrückrollen 46 einher.When machining the workpiece 14 by means of the tool 20, the drive element 36 of the drive device 20 is set in a rotational movement. Via a frictional connection with the first end face of the workpiece 14, the workpiece 14 is set in a rotational movement about the axis of rotation 16. About the frictional engagement between the running surface 50 of a pressure roller 46 and the end face 38 of the workpiece 14, the pressure rollers are rotated. The movements described above are also associated with a slight change in position and / or position of the pressure rollers 46.

Die Vorrichtung 10 umfasst eine Erfassungseinrichtung 52 zur Erfassung zumindest einer der vorgenannten Bewegungsarten der Andrückrolle 46. Insbesondere kann die Erfassungseinrichtung einen Beschleunigungssensor 54 umfassen. Der Beschleunigungssensor 54 ist starr mit einem Materialabschnitt 56 des Trägers 44 verbunden, welcher gleichzeitig zur Lagerung der Andrückrollen 46 dient.The device 10 comprises a detection device 52 for detecting at least one of the aforementioned types of movement of the pressure roller 46. In particular, the detection device may comprise an acceleration sensor 54. The acceleration sensor 54 is rigidly connected to a material portion 56 of the carrier 44, which simultaneously serves to support the pressure rollers 46.

Optional umfasst die Vorrichtung 10 eine schematisch dargestellte Störungswarneinrichtung 58 (beispielsweise eine Warnleuchte), eine Entnahmeeinrichtung 60 zur Entnahme eines bearbeiteten Werkstücks 14 (beispielsweise ein Greifer) und eine Steuerungseinrichtung 62 zur Steuerung der Störungswarneinrichtung 58 und/oder der Entnahmeeinrichtung 60 in Abhängigkeit von mittels der Erfassungseinrichtung 52 gewonnenen Bewegungssignalen der Andrückrollen 46.Optionally, the device 10 comprises a schematically illustrated malfunction warning device 58 (for example a warning light), a removal device 60 for removing a machined workpiece 14 (for example a gripper) and a control device 62 for controlling the malfunction warning device 58 and / or the removal device 60 as a function of Detection device 52 obtained motion signals of the pressure rollers 46th

Die in Figur 2 bis 4 dargestellten Diagramme weisen eine Zeitachse 64 mit Zeitwerten und eine Werteachse mit Beschleunigungswerten auf. Die in den Figuren 2 bis 4 dargestellten Messlinien 68 stellen Beschleunigungswerte dar, welche entlang eines zeitlichen Verlaufs mittels der Erfassungseinrichtung 52 erfasst werden können, wenn die Antriebseinrichtung 12 in zwei unterschiedlichen Betriebszuständen betrieben wird.In the FIGS. 2 to 4 Diagrams shown have a time axis 64 with time values and a value axis with acceleration values. The in the FIGS. 2 to 4 shown measuring lines 68 represent acceleration values, which along a time course by means of Detection device 52 can be detected when the drive device 12 is operated in two different operating states.

Für das Beispiel der Figur 2 liegen bei einem Stillstand des Motors 26 erste Beschleunigungswerte 70 an, welche ein vergleichsweise niedriges Niveau aufweisen, das einem "Grundrauschen" der Vorrichtung 10 und der Umgebung der Vorrichtung 10 entspricht. Diese Werte korrespondieren beispielsweise mit in etwa dem 0,03-fachen der Erdbeschleunigung.For the example of FIG. 2 At a standstill of the motor 26 are at first acceleration values 70, which have a comparatively low level, which corresponds to a "noise floor" of the device 10 and the environment of the device 10. For example, these values correspond to approximately 0.03 times the gravitational acceleration.

Wird die Antriebseinrichtung 12 in einen zweiten Zustand überführt, beispielsweise in einen Zustand, in welchem der Motor 26 mit einer Drehzahl von 100 U/min betrieben wird, können mittels der Erfassungseinrichtung 52 höhere zweite Beschleunigungswerte 72 (beispielsweise in Höhe von ca. 0,1 g). Der Unterschied zwischen den ersten Beschleunigungswerten 70 und 72 ist groß genug, um abweichend vom Stillstand des Motors 26 feststellen zu können, dass der Motor 26 in Betrieb ist und eine gewünschte Bewegung der Andrückrollen 46 erzeugt.If the drive device 12 is brought into a second state, for example into a state in which the motor 26 is operated at a speed of 100 rpm, higher second acceleration values 72 (for example in the amount of approximately 0.1 G). The difference between the first acceleration values 70 and 72 is large enough to be able to determine that the motor 26 is operating and produces a desired movement of the pressure rollers 46, notwithstanding the stoppage of the motor 26.

In Figur 3 ist eine Diagramm für das Beispiel eines Motors 26 dargestellt, welcher ausgehend von einem Betriebszustand mit 60 U/min in einen Stillstand überführt wird. Hierbei korrespondieren erste Beschleunigungswerte 70 (in Höhe von beispielsweise ca. 0,04 g) mit dem sich bewegenden Motor 26 und zweite Beschleunigungswerte (in Höhe von beispielsweise ca. 0,03 g) mit dem Stillstand des Motors 26.In FIG. 3 2 is a diagram for the example of a motor 26 which is brought to a standstill starting from an operating state at 60 rpm. Here, first acceleration values 70 (in the amount of, for example, approximately 0.04 g) with the moving motor 26 and second acceleration values (in the amount of, for example, approximately 0.03 g) correspond to the standstill of the motor 26.

In Figur 4 sind erste Beschleunigungswerte 70 (in Höhe von beispielsweise 0,05 g) und zweite Beschleunigungswerte 72 (in Höhe von beispielsweise 0,55 g) dargestellt, welche mit einer Überführung einer ersten Motordrehzahl des Motors 26 hin zu einer zweiten Drehzahl des Motors 26 korrespondieren. Beispielsweise wird der Motor 26 zunächst mit 80 U/min und dann (ab dem Zeitpunkt 13:17:10) mit 350 U/min betrieben.In FIG. 4 For example, first acceleration values 70 (of the order of 0.05 g, for example) and second acceleration values 72 (of the order of, for example, 0.55 g), which are associated with a transfer of a first engine speed of the engine 26 correspond to a second speed of the motor 26. For example, the engine 26 is first operated at 80 rpm and then (from the time 13:17:10) at 350 rpm.

Die ersten Beschleunigungswerte 70 und die zweiten Beschleunigungswerte 72 können also für unterschiedliche Betriebszustände des Motors 26 miteinander verglichen werden. Ist eine Differenz niedriger als eine vorgebbare Mindestdifferenz (welche beispielsweise in der Steuerungseinrichtung 62 hinterlegbar ist) kann auf eine Störung in der Antriebseinrichtung 12 der Vorrichtung 10 und/oder in einem Kontaktbereich des Werkstücks 14 geschlossen werden und die Störungswarneinrichtung 58 aktiviert und/oder die Entnahmeeinrichtung 60 deaktiviert werden.The first acceleration values 70 and the second acceleration values 72 can thus be compared with one another for different operating states of the engine 26. If a difference is lower than a predefinable minimum difference (which can be stored, for example, in the control device 62), it is possible to infer a disturbance in the drive device 12 of the device 10 and / or in a contact region of the workpiece 14 and activate the disturbance warning device 58 and / or the removal device 60 are disabled.

Claims (9)

Vorrichtung (10) zur Fein- oder Feinstbearbeitung einer rotationssymmetrischen Werkstückfläche (18) eines Werkstücks (14), mit einer Antriebseinrichtung (12) zum Antrieb des Werkstücks (14) um eine Rotationsachse (16), mit bezogen auf die Rotationsachse (16) in radialen Richtungen wirksamen Führungseinrichtungen (22) und einem in einer radialer Richtung wirksamen Werkzeug (20), mit einer Andrückrollen (46) aufweisenden Andrückeinrichtung (40) zum Andrücken des Werkstücks (14) gegen ein Antriebselement (36) der Antriebseinrichtung (12), wobei das Werkstück (14) in Richtung der Rotationsachse (16) gesehen zwischen dem Antriebselement (36) und den Andrückrollen (46) anordenbar ist, dadurch gekennzeichnet, dass eine Erfassungseinrichtung (52) zur Erfassung einer Bewegung mindestens einer Andrückrolle (46) vorgesehen ist.Device (10) for fine or ultra-fine machining of a rotationally symmetrical workpiece surface (18) of a workpiece (14), with a drive device (12) for driving the workpiece (14) about an axis of rotation (16), with respect to the axis of rotation (16) radial directions effective guide means (22) and an effective in a radial direction tool (20), with a pressure rollers (46) having Andrückeinrichtung (40) for pressing the workpiece (14) against a drive element (36) of the drive means (12), wherein the workpiece (14) in the direction of the axis of rotation (16) between the drive element (36) and the pressure rollers (46) can be arranged, characterized in that a detection device (52) for detecting a movement of at least one pressure roller (46) is provided. Vorrichtung (10) nach Anspruch 1, dadurch gekennzeichnet, dass die Erfassungseinrichtung (52) einen Bewegungssensor zur Erfassung einer Drehbewegung der Andrückrolle (46) um eine Andrückrollenachse (48) umfasst.Apparatus (10) according to claim 1, characterized in that the detection device (52) comprises a movement sensor for detecting a rotational movement of the pressure roller (46) about a pressure roller axis (48). Vorrichtung (10) nach Anspruch 2, dadurch gekennzeichnet, dass die Andrückrolle (46) einen mit dem Bewegungssensor kommunizierenden Referenzabschnitt aufweist, welcher insbesondere separat von der Lauffläche (50) der Andrückrolle (46) vorgesehen ist.Device (10) according to claim 2, characterized in that the pressure roller (46) has a with the motion sensor communicating reference portion, which is in particular provided separately from the running surface (50) of the pressure roller (46). Vorrichtung (10) nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass die Erfassungseinrichtung (52) einen Beschleunigungssensor (54) zur Erfassung einer Positions- und/oder Lageänderung der Andrückrolle (46) umfasst.Device (10) according to one of the preceding claims, characterized in that the Detection device (52) comprises an acceleration sensor (54) for detecting a position and / or position change of the pressure roller (46). Vorrichtung (10) nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass der Bewegungssensor und/oder der Beschleunigungssensor (54) in oder an einem Träger (44) zur Lagerung der Andrückrolle (46) angeordnet ist.Device (10) according to one of the preceding claims, characterized in that the movement sensor and / or the acceleration sensor (54) in or on a support (44) for supporting the pressure roller (46) is arranged. Vorrichtung (10) nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass die Antriebseinrichtung (12) einen Motor (26) und eine von dem Motor (26) angetriebene Spindel (28) zum Antrieb des Antriebselements (36) umfasst.Device (10) according to one of the preceding claims, characterized in that the drive device (12) comprises a motor (26) and one of the motor (26) driven spindle (28) for driving the drive element (36). Vorrichtung (10) nach Anspruch 6, dadurch gekennzeichnet, dass die Antriebseinrichtung (12) eine Kupplung (30) zur schaltbaren Verbindung eines Kraftflusses zwischen Motor (26) und Antriebselement (36) umfasst.Device (10) according to claim 6, characterized in that the drive device (12) comprises a clutch (30) for the switchable connection of a power flow between the motor (26) and drive element (36). Vorrichtung (10) nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass die Vorrichtung (10) eine Entnahmeeinrichtung (60) zur Entnahme eines bearbeiteten Werkstücks (14) und/oder eine Störungswarneinrichtung (58) aufweist und dass die Entnahmeeinrichtung (60) und/oder die Störungswarneinrichtung (58) betätigbar ist oder sind in Abhängigkeit einer mittels der Erfassungseinrichtung (52) erfassten Bewegung der Andrückrolle (46).Device (10) according to one of the preceding claims, characterized in that the device (10) has a removal device (60) for removing a machined workpiece (14) and / or a malfunction warning device (58) and in that the removal device (60) and / or or the malfunction warning device (58) can be actuated or are dependent on a movement of the pressure roller (46) detected by means of the detection device (52). Verfahren zum Betrieb einer Vorrichtung (10) nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass bei einer ersten Drehzahl eines Motors (26) der Antriebseinrichtung (12) erste Beschleunigungswerte (70) einer Positions- und/oder Lageänderung der Andrückrolle (46) und bei einer von der ersten Drehzahl abweichenden zweiten Drehzahl zweite Beschleunigungswerte (72) einer Positions- und/oder Lageänderung der Andrückrolle (46) erfasst werden und dass bei Unterschreitung einer vorgebbaren Mindestdifferenz zwischen den ersten und den zweiten Beschleunigungswerten (70, 72) eine Entnahmeeinrichtung (60) zur Entnahme eines bearbeiteten Werkstücks (14) deaktiviert und/oder eine Störungswarneinrichtung (50) aktiviert wird.Method for operating a device (10) according to any one of the preceding claims, characterized in that at a first rotational speed of a motor (26) of the drive means (12) first Acceleration values (70) of a position and / or position change of the pressure roller (46) and at a second speed deviating from the first speed second acceleration values (72) of a position and / or position change of the pressure roller (46) are detected and that falls below a predetermined minimum difference between the first and second acceleration values (70, 72), a removal device (60) for removing a machined workpiece (14) is deactivated and / or a fault warning device (50) is activated.
EP20120172414 2012-06-18 2012-06-18 Device for fine finishing or superfinishing a rotation-symmetric area of a workpiece Not-in-force EP2676770B1 (en)

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EP20120172414 EP2676770B1 (en) 2012-06-18 2012-06-18 Device for fine finishing or superfinishing a rotation-symmetric area of a workpiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20120172414 EP2676770B1 (en) 2012-06-18 2012-06-18 Device for fine finishing or superfinishing a rotation-symmetric area of a workpiece

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EP2676770A1 true EP2676770A1 (en) 2013-12-25
EP2676770B1 EP2676770B1 (en) 2014-06-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105829021A (en) * 2014-02-21 2016-08-03 德国索菲纳有限公司 Finishing device and method for machining shaft axial bearings

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020152616A1 (en) * 2001-02-27 2002-10-24 Nsk Ltd. Method and apparatus for superfinishing tapered roller bearing
EP2218545A1 (en) 2009-02-13 2010-08-18 Supfina Grieshaber GmbH & Co. KG Device and method for fine processing of a rotation-symmetric workpiece surface

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020152616A1 (en) * 2001-02-27 2002-10-24 Nsk Ltd. Method and apparatus for superfinishing tapered roller bearing
EP2218545A1 (en) 2009-02-13 2010-08-18 Supfina Grieshaber GmbH & Co. KG Device and method for fine processing of a rotation-symmetric workpiece surface

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105829021A (en) * 2014-02-21 2016-08-03 德国索菲纳有限公司 Finishing device and method for machining shaft axial bearings
CN105829021B (en) * 2014-02-21 2018-06-01 德国索菲纳有限公司 For processing the precise machining device of axis thrust bearing and method

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