EP2871445A1 - Dispositif de traitement de finition d'une pièce à usiner - Google Patents

Dispositif de traitement de finition d'une pièce à usiner Download PDF

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Publication number
EP2871445A1
EP2871445A1 EP20130192493 EP13192493A EP2871445A1 EP 2871445 A1 EP2871445 A1 EP 2871445A1 EP 20130192493 EP20130192493 EP 20130192493 EP 13192493 A EP13192493 A EP 13192493A EP 2871445 A1 EP2871445 A1 EP 2871445A1
Authority
EP
European Patent Office
Prior art keywords
finishing stone
pivot
workpiece
axis
finishing
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
EP20130192493
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German (de)
English (en)
Other versions
EP2871445B1 (fr
Inventor
Alfons Haas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Supfina Grieshaber GmbH and Co KG
Original Assignee
Supfina Grieshaber GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Supfina Grieshaber GmbH and Co KG filed Critical Supfina Grieshaber GmbH and Co KG
Priority to EP13192493.8A priority Critical patent/EP2871445B1/fr
Publication of EP2871445A1 publication Critical patent/EP2871445A1/fr
Application granted granted Critical
Publication of EP2871445B1 publication Critical patent/EP2871445B1/fr
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Anticipated expiration legal-status Critical

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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
    • 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
    • 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

Definitions

  • the invention relates to a device for finish machining a workpiece, with a finishing stone holder for holding a finishing stone.
  • Finish finishing of a workpiece is a method of surface machining a workpiece, also referred to as "superfinishing” or “microfinishing”.
  • an abrasive finishing stone is pressed onto the workpiece surface to be machined.
  • the workpiece surface to be machined rotates.
  • the rotation of the workpiece surface to be machined is superimposed on an oscillating movement, in which the finishing stone and the workpiece surface to be machined in the Rotation axis move parallel directions relative to each other.
  • a device is known in which by wear and oblique Anformung a finishing stone resulting boundary layers of a finishing stone are detected. Upon reaching a limit position, there is a reversal of a relative direction of movement between the workpiece surface to be machined and the effective surface of the finishing stone.
  • This device has the advantage that a large useful length of a finishing stone can be provided.
  • the object of the present invention is to provide a finishing device with which a workpiece surface can be finish-finished with high accuracy.
  • the device comprises a pivotable about a pivot axis pivot carrier for the arrangement of a Kraftbeiertschungs till, which is located on the
  • Swivel carrier supports and exerts a force on the finishing stone holder and / or the finishing stone and presses an effective surface of the finishing stone against a workpiece surface to be machined, wherein the Kraftbeaufschlagungs adopted, the finishing stone holder and the finishing stone are pivotable together with the pivot support about the pivot axis.
  • the inventive device has the advantage that a pressing force, which presses the effective surface of the finishing stone on the workpiece surface to be machined, regardless of the pivot position of the finishing stone holder and the finishing stone and regardless of the contour of the workpiece surface to be machined is always aligned perpendicular to the workpiece surface. This reduces the undesirable effect of the oblique formation of the effective surface of the finishing stone.
  • the device according to the invention makes it possible to keep constant a distance between the pivot axis and the effective surface of the finishing stone, measured in the pressing direction, independently of a wear state of the finishing stone. In this way, an important for the dimensional accuracy of the workpiece surface to be machined parameters can be kept constant. Thus, a high dimensional accuracy is possible regardless of a wear state of the finishing stone.
  • the force application device comprises a pneumatic drive.
  • a pneumatic drive allows easy control of the force acting on the finishing stone holder and / or the finishing stone in the direction of the workpiece forces.
  • the pneumatic drive allows the effective surface of the finishing stone to be used even in the case of a complex geometry of the workpiece with a constant force against a workpiece surface to be machined section.
  • the pneumatic drive in a direction opposite to the direction of force is yielding, so that a protection against damage can be created, which could occur in a relentless contact of the effective surface of the finishing stone and the workpiece surface to be machined.
  • the pneumatic drive preferably comprises a first component in the form of a cylinder and a second component in the form of a guided in the cylinder piston, wherein one of the components with the pivot carrier and the other of the components with the finishing stone holder and / or the finishing stone is connected.
  • the direction of relative movement between the piston and cylinder predetermines a direction along which the finishing stone holder and / or the finishing stone is subjected to a force which is transmitted via the active surface to the workpiece surface to be machined. Since both the cylinder and the piston are pivoted together with the pivot carrier, it is ensured that the direction in which the pressing force is generated, is always aligned perpendicular to the workpiece surface portion to be machined.
  • the pneumatic drive described above simultaneously forms a guide device for guiding the finish stone holder relative to the pivot support.
  • a guide device separate from the force application device is provided for guiding the finish stone holder relative to the pivot carrier along a guide axis.
  • the guide axis extends in particular parallel to the force-generating direction of the Kraftbeaufschlagungs adopted. A separate from the Kraftbeaufschlagungs issued guide device makes it possible to relieve the force application of lateral forces.
  • the Kraftbeetzschlagungs spur acts both on the finish stone holder and on the finishing stone itself.
  • the force application device act only on the finish stone holder and in particular that the finishing stone is immovable in its held on the finish stone holder state relative to the finish stone holder. This allows a particularly precise guidance of the finish stone holder relative to the pivot carrier and a reliable fixation of the finishing stone to the finish stone holder.
  • the pivot axis is arranged on a pivot axis carrier, which is drivable by means of a longitudinal axis drive in a direction parallel to a rotational axis of the workpiece to be machined workpiece. This makes it possible to shift the pivot axis relative to the workpiece surface to be machined via the workpiece length measured parallel to a rotation axis of the workpiece to be machined.
  • a workpiece drive by means of which the workpiece is displaceable in a direction parallel to the axis of rotation of the workpiece.
  • the longitudinal axis drive comprises an oscillation drive.
  • the Pivot axis are driven by a short-stroke reciprocating motion.
  • This short-stroke movement is that movement which, together with the rotational movement of the workpiece to be machined, produces the cross-cut structure characteristic of a finish machining by acting on the effective surface of the finishing stone on the workpiece surface.
  • an angle detection device is provided for detecting an angular position of the pivot support about the pivot axis.
  • Such an angle detection device makes it possible to detect skewed positions of the pivot carrier, and thus also of the finish stone holder and the finishing stone, which have formed due to the oblique formation of a finishing stone.
  • a stationary relative to the pivot axis sensor is provided, which cooperates with a sensor reference surface, the is pivotable together with the pivot carrier. This simplifies the electrical connection of the sensor. But it is also a reverse arrangement conceivable in which the sensor is pivoted together with the pivot carrier and the sensor reference surface is fixed relative to the pivot axis, that is arranged for example on the pivot axis carrier.
  • a particularly simple detection of different angular positions of the pivot carrier is made possible if the sensor reference surface has a curvature deviating from a circular arc surface.
  • a particularly high accuracy of measurement with good resolution results when the pivot axis is arranged within a plane of action of the sensor.
  • an angle compensation device is provided for generating a moment acting about the pivot axis on the finishing stone holder and / or the finishing stone. Such a moment makes it possible to "deform" an obliquely formed finishing stone until the effective surface of the finishing stone is again oriented perpendicular to the finishing stone longitudinal axis or has oppositely inclined, oblique shaping.
  • the angle compensation device comprises a pneumatic actuator.
  • the pneumatic actuator is yielding ("soft"), so that a reshaping of an obliquely formed finish stone takes place gradually and over a certain processing time and not directly. Too quickly compensate for an inclination of the finishing stone might have dimensional inaccuracies of the workpiece surface to be machined result.
  • an alignment unit is provided for aligning the pivot carrier in a predefinable angular position.
  • the pivot carrier can be aligned in a predetermined angular position, without requiring the contact of the effective surface of the finishing stone is required with a workpiece to be machined. This is particularly advantageous in the course of a machine tool device and the preparation of a workpiece lot.
  • the workpiece 12 has a finish to be machined workpiece surface 18, which is rotationally symmetrical with respect to the axis of rotation 14.
  • the workpiece surface 18 extends along a rotational axis 14 between a first workpiece end 20 and a second workpiece end 22.
  • a finishing stone 26 extending along a finishing stone longitudinal axis 24 is provided (in FIG Fig. 1a indicated by dashed lines and in Fig. 1b shown by solid lines).
  • the finishing stone 26 is made of an abrasive material and, facing the workpiece 12, has an active surface 28 which is pressed against the workpiece surface 18 during the finish machining of the workpiece 12.
  • the finishing stone 26 is held on a finishing stone holder 30, which has clamping jaws 31 for fastening the finishing stone 26 to the finishing stone holder 30.
  • the finishing stone holder 30 is attached to a first assembly 32 which extends along a guide axis 34 (which is preferably parallel to the finishing stone longitudinal axis 24) relative to a second assembly 36 is displaceable.
  • the second assembly 36 is disposed on a pivot support 38 and fixedly connected thereto.
  • the pivot carrier is pivotable about a pivot axis 40.
  • the pivot axis 40 extends offset and perpendicular to the axis of rotation 14 of the workpiece 12 and perpendicular to the finish stone axis 24. All at least indirectly connected to the pivot support 38 components up to the active surface 28 of the finishing stone 26 together form a pivotable about the pivot axis 40 pivot unit 42nd
  • a pivot axis carrier 44 is provided. This comprises a carrier arm 46 and, at the end facing away from the pivot axis 40, an interface 48 for connection to drive devices 50, described schematically below.
  • the drive devices 50 preferably include a longitudinal axis drive 52, by means of which the pivot axis carrier 44 is movable along a longitudinal axis 54, which runs parallel to the axis of rotation 14 of the workpiece 12.
  • the longitudinal axis drive 52 comprises an oscillation drive 56 for generating a short-stroke oscillation movement 58, which also runs parallel to the rotation axis 14 of the workpiece 12.
  • the oscillation drive 56 can be, for example, a known eccentric drive.
  • a transverse axis drive 60 is provided, by means of which the pivot axis carrier 44 can be moved along a transverse axis 62.
  • the transverse axis 62 is parallel to the finishing stone longitudinal axis 24 and perpendicular to the axis of rotation 14 of the workpiece 12th
  • the longitudinal axis drive 52 is arranged on a cross slide 63, which can be moved by means of the (frame-fixed) transverse axis drive 60 along the transverse axis 62.
  • the workpiece 12 rotates about the rotation axis 14.
  • the pivot axis carrier 44 is moved along the longitudinal axis 54 by means of the longitudinal axis drive 52 so that the effective surface 28 of the finishing stone 26 sweeps over the entire length of the workpiece 12.
  • the oscillation drive 56 By means of the oscillation drive 56, the long-stroke movement along the longitudinal axis 54 is superimposed by a short-stroke oscillation movement (reciprocating movement) 58.
  • the pivot axis carrier 44 is moved along the transverse axis 62 by means of the transverse axis drive 60.
  • the pivot axis 40 is moved between the first workpiece end 20 and the second workpiece end 22. Due to the effect of the transverse axis drive 60, the distance between the pivot axis 40 and the workpiece surface 18 to be machined remains constant. In this case, the active surface 28 of the finishing stone 26 is pressed against the workpiece surface area to be machined by means of a force application device described in more detail below, wherein the direction of the force acting on the workpiece surface is always aligned perpendicular to the workpiece surface portion to be machined.
  • the pivoting unit 42 at the level of a central position 64 (see. FIG. 2 ) of the workpiece 12 so that the finishing stone longitudinal axis 24 is perpendicular to the axis of rotation 14 of the workpiece 12.
  • the pivot unit 42 pivots relative to a reference perpendicular 66, which runs perpendicular to the axis of rotation 14 of the workpiece 12, about a first pivot angle 68 (cf. FIG. 3 ).
  • the pivoting unit 42 is freely pivotable relative to the pivot axis carrier 44.
  • the finishing stone 26 and thus the pivoting unit 42 align themselves automatically.
  • the pivoting unit 42 should also be alignable in a predeterminable angular position when the active surface 28 of the finishing stone 26 is not applied to the workpiece surface 18.
  • the device 10 comprises an alignment unit 72 for aligning the pivot carrier 38 in a predeterminable angular position.
  • the predefinable angular position is preferably an angular position in which the finishing stone longitudinal axis 24 is arranged vertically relative to a rotational axis 14 of a workpiece 12 to be machined.
  • the alignment unit 72 comprises a pivoting part 74, which is pivotable together with the pivoting carrier 38 about the pivot axis 40.
  • the pivoting part 74 is, for example, polygonal in profile, in particular triangular, and comprises an angular engagement portion 76 for engagement in a complementary to the engagement portion shaped receptacle 78.
  • the receptacle 78 is disposed on the pivot axis support 46 and there by means of a recording drive 80 along an axis 82 slidably so that the receptacle 78 can be brought out of engagement with the pivoting part 74 (in FIG FIG. 5 shown) and can be brought into engagement with the pivoting part 74 when needed. If starting from the in FIG.
  • the receiving part 78 is moved in the direction of the pivot axis 40, the engagement portion 76 comes into contact with the V-shaped receptacle of the receiving part 78, so that the pivot member 74 occupies a pivot position, in which the engagement portion 76 complementary in the receiving part 78th is included.
  • a first assembly 32 is provided for attachment of the finishing stone holder 30.
  • the first assembly 32 serves to arrange at least one cylinder 84, which is relatively displaceable relative to a piston 86 arranged in the cylinder 84.
  • the piston 86 is part of the second assembly 36, which is fixedly connected to the pivot carrier 38.
  • the cylinder 84 and the piston 86 together form a force application device 88.
  • the first assembly 32 pushes away from the second assembly 36 and takes the finishing stone holder 30 and the finishing stone 26 held thereon, so that the active surface 28 of the finishing stone 26 is pressed against the workpiece surface 18 to be machined.
  • Kraftbeetzschlagungs sootheen 88 are provided, which are arranged symmetrically distributed in particular with respect to the finishing stone 26.
  • a separate guide means 90 is provided, which comprises a guide bearing 92 and a guide rail 94, which is displaceable relative to the guide bearing 92 along the guide axis 34.
  • the guide bearings 92 are immovable relative to the pivot support 38 and connected to the second assembly 36.
  • the guide rail 94 is fixedly connected to the first assembly 32 and slidable along the guide shaft 34 together with the first assembly 32 and the finishing stone holder 30 and the finishing stone 26.
  • the pivot bearing of the pivot carrier 38 on the pivot axis carrier 46 includes a rotatably connected to the pivot carrier 38 shaft 95 which is pivotally mounted via a roller bearing 97 in a shaft bearing portion 99 of the pivot axis carrier 46.
  • finishing stone 26 wears, so that the effective surface 28 of the finishing stone 26 continues towards the finish stone holder 30 emigrated. This shortening of the finishing stone 26 can be compensated by means of the force application device 88.
  • the device 10 comprises an angle detection device 96 (cf. FIG. 9 ).
  • the sensor 98 cooperates with a sensor reference surface 100, which is stationary with respect to the pivot carrier 38 and pivoted as part of the pivot unit 42 about the pivot axis 40.
  • the sensor reference surface 100 is preferably a cam surface which deviates from a circular arc surface.
  • a working plane 102 of the sensor 98 is aligned so that the pivot axis 40 is disposed within the active plane 102.
  • a distance 104 (cf. FIG. 10 ) between the sensor reference surface 100 and the sensor 98 corresponds to a specific pivoting angle 108 between the finishing stone longitudinal axis 24 and the reference perpendiculars 66.
  • a measured value of deviates from a predetermined setpoint corresponds to an angle 108 between the reference vertical 66 and the finishing stone longitudinal axis 24.
  • the angle 108 is equal to Inclination angle of the tapered effective surface 28 of the finishing stone 26 relative to an ideal, non-tapered effective surface.
  • the device 10 comprises an angle compensation device 110.
  • This preferably comprises a pneumatic actuator with a cylinder 112 and a piston 114.
  • the cylinder 110 is pivotally mounted on the pivot axis support 46 about a pivot axis 111.
  • the piston 114 is veschietons relative to the cylinder 112 and has a sliding block 116 at its free end.
  • the sliding block 116 engages around a parallel to the pivot axis 40 aligned bolt 118, which is connected to the pivot carrier 38.
  • angle compensation device 110 If the angle 108 exceeds a predeterminable extent, it is possible to activate the angle compensation device 110, and one of the end surfaces 120, 122 of the sliding block 116 (see FIG. FIG. 9 ) into abutment with the bolt 118. It is possible, by retracting the piston 114 and abutment of the end surface 120 by means of the sliding block 116 to exert a tensile force on the bolt 118 and thus to generate a moment acting in a first direction of rotation about the pivot axis 40 moment on the pivoting unit 42 (see Fig. 10 , first direction of rotation counterclockwise).
  • a resulting from oblique Anformung a finishing stone shape error can thus be compensated and the finishing stone 26 in the course of finishing machining a workpiece 12 are gradually returned to a desired position. It is particularly advantageous that the finishing machining of the workpiece 12 can be continued with activated angle compensation device 110 and the deformation of a bevelled active surface 28 requires no time-outs.
EP13192493.8A 2013-11-12 2013-11-12 Dispositif de traitement de finition d'une pièce à usiner Active EP2871445B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13192493.8A EP2871445B1 (fr) 2013-11-12 2013-11-12 Dispositif de traitement de finition d'une pièce à usiner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13192493.8A EP2871445B1 (fr) 2013-11-12 2013-11-12 Dispositif de traitement de finition d'une pièce à usiner

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EP2871445A1 true EP2871445A1 (fr) 2015-05-13
EP2871445B1 EP2871445B1 (fr) 2019-01-02

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015197448A1 (fr) * 2014-06-23 2015-12-30 Nagel Maschinen- Und Werkzeugfabrik Gmbh Procédé et dispositif servant à effectuer des finitions sur les surfaces périphériques de parties de pièces à usiner symétriques en rotation
DE102015205644A1 (de) * 2015-03-27 2016-09-29 Supfina Grieshaber Gmbh & Co. Kg Finishsteinhaltevorrichtung
DE102019103677A1 (de) * 2019-02-13 2020-08-13 Supfina Grieshaber Gmbh & Co. Kg Finishvorrichtung und Verfahren zur Finishbearbeitung eines Werkstücks

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4573289A (en) * 1982-07-10 1986-03-04 Supfina Maschinenfabrik Hentzen Gmbh & Co Kg Apparatus for superfinishing bearing rollers
WO1992005405A1 (fr) * 1990-09-26 1992-04-02 Sunwell Technologies, Inc. Ensemble d'alignement angulaire
DE102011007731A1 (de) 2011-04-20 2012-10-25 Supfina Grieshaber Gmbh & Co. Kg Finishvorrichtung
DE102011078735A1 (de) * 2011-07-06 2013-01-10 Supfina Grieshaber Gmbh & Co. Kg Finishvorrichtung
DE102011087252B3 (de) * 2011-11-28 2013-01-17 Supfina Grieshaber Gmbh & Co. Kg Vorrichtung zur Finishbearbeitung eines insbesondere ringförmigen Werkstücks

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4573289A (en) * 1982-07-10 1986-03-04 Supfina Maschinenfabrik Hentzen Gmbh & Co Kg Apparatus for superfinishing bearing rollers
WO1992005405A1 (fr) * 1990-09-26 1992-04-02 Sunwell Technologies, Inc. Ensemble d'alignement angulaire
DE102011007731A1 (de) 2011-04-20 2012-10-25 Supfina Grieshaber Gmbh & Co. Kg Finishvorrichtung
DE102011078735A1 (de) * 2011-07-06 2013-01-10 Supfina Grieshaber Gmbh & Co. Kg Finishvorrichtung
DE102011087252B3 (de) * 2011-11-28 2013-01-17 Supfina Grieshaber Gmbh & Co. Kg Vorrichtung zur Finishbearbeitung eines insbesondere ringförmigen Werkstücks

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015197448A1 (fr) * 2014-06-23 2015-12-30 Nagel Maschinen- Und Werkzeugfabrik Gmbh Procédé et dispositif servant à effectuer des finitions sur les surfaces périphériques de parties de pièces à usiner symétriques en rotation
DE102014211937C5 (de) * 2014-06-23 2016-06-02 Nagel Maschinen- Und Werkzeugfabrik Gmbh Verfahren und Vorrichtung zur Finish-Bearbeitung von Umfangsflächen rotationssymmetrischer Werkstückabschnitte
EP3157708B1 (fr) 2014-06-23 2019-02-27 Nagel Maschinen- und Werkzeugfabrik GmbH Procédé et dispositif servant à effectuer des finitions sur les surfaces périphériques de parties de pièces à usiner symétriques en rotation
DE102015205644A1 (de) * 2015-03-27 2016-09-29 Supfina Grieshaber Gmbh & Co. Kg Finishsteinhaltevorrichtung
DE102015205644B4 (de) * 2015-03-27 2021-03-25 Supfina Grieshaber Gmbh & Co. Kg Finishsteinhaltevorrichtung
DE102019103677A1 (de) * 2019-02-13 2020-08-13 Supfina Grieshaber Gmbh & Co. Kg Finishvorrichtung und Verfahren zur Finishbearbeitung eines Werkstücks

Also Published As

Publication number Publication date
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