EP2871024A1 - Dispositif de traitement de finition d'une surface de pièce courbée et procédé de fonctionnement du dispositif - Google Patents

Dispositif de traitement de finition d'une surface de pièce courbée et procédé de fonctionnement du dispositif Download PDF

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Publication number
EP2871024A1
EP2871024A1 EP20130192497 EP13192497A EP2871024A1 EP 2871024 A1 EP2871024 A1 EP 2871024A1 EP 20130192497 EP20130192497 EP 20130192497 EP 13192497 A EP13192497 A EP 13192497A EP 2871024 A1 EP2871024 A1 EP 2871024A1
Authority
EP
European Patent Office
Prior art keywords
coupling
distance
frame
finishing tool
fixed
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
EP20130192497
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German (de)
English (en)
Other versions
EP2871024B1 (fr
Inventor
Christoph Weber
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
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Supfina Grieshaber GmbH and Co KG
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Application filed by Supfina Grieshaber GmbH and Co KG filed Critical Supfina Grieshaber GmbH and Co KG
Priority to EP13192497.9A priority Critical patent/EP2871024B1/fr
Publication of EP2871024A1 publication Critical patent/EP2871024A1/fr
Application granted granted Critical
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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
    • B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency

Definitions

  • the invention relates to a device for finishing a particularly curved workpiece surface, comprising a drive device for generating an oscillating pivoting movement of a finishing tool holder for holding a finishing tool, wherein an effective surface of the finishing tool is not pivotable about a structurally realized pivot axis but about a virtual pivot axis.
  • Finish finishing of a workpiece is a method of surface machining a workpiece, also referred to as "superfinishing” or “microfinishing”.
  • an abrasive Finish tool such as a finishing stone or a finishing tape, pressed on 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 tool and the workpiece surface to be machined move relative to each other in directions parallel or inclined to the axis of rotation.
  • the finishing machining of workpieces is also used to machine profile surfaces that are curved in profile.
  • workpieces with such workpiece surfaces are roller bearing rings or bearing bodies.
  • Curved workpiece surfaces are processed by means of finishing tools, in particular by means of finishing stones, which are pivoted back and forth about a pivot axis.
  • a drive device is used, which generates a drive movement, which is translated by means of a transmission device into a pivoting movement of the finishing tool.
  • Devices of this type are also referred to as "circular oscillators”.
  • circular oscillators can be used by the EP 0 936 028 A2 have become known.
  • pivot arm provided, which engages over a ring cross section of a workpiece to be machined by means of a U-shaped bracket, so that a held at a free end of the bracket finishing tool can be brought into operative contact with a radially inwardly facing workpiece surface.
  • the present invention has the object to provide a device which allows the simplest possible processing of workpieces with different geometries.
  • the drive means comprises a coupling for driving the finish tool holder, that the coupling is rotatably connected to two frame-mounted wings and that a Abstandseinstell issued for adjusting the distance of the frame-fixed bearings of the two Swing is provided.
  • the drive device allows a quick and easy displacement of the virtual Swivel axis to adapt the device to the geometry of each workpiece surface to be machined can.
  • the displacement of the virtual pivot axis is accompanied by the adjustment of the distance of the frame-fixed bearings of two wings. These wings are rotatably connected to a coupling which drives the finish tool holder with the finishing tool held thereon.
  • a four-bar chain in the form of a double rocker is suitable as a drive for a finish tool holder, but also that such a gear allows a particularly simple adaptation of a virtual pivot axis of the effective surface of the finishing tool.
  • the distance between the frame-fixed swing bearings is set so that it is greater than the distance between the coupling-fixed swing bearings.
  • the distance between the frame-fixed rocker bearings is set so that it is smaller than the distance between the coupling-fixed rocker bearings.
  • the Abstandseinstell listening comprises a spindle having a first thread which cooperates with a first swing bearing support for the frame-fixed swing bearing a first rocker and with a counter to the first thread second thread, which with a second swing bearing carrier for the frame-fixed swing bearing a second rocker cooperates.
  • This Abstandseinstell listening has the advantage that only one drive is required, which acts on the spindle. This drive can be a hand drive or a motor drive.
  • both frame-fixed rocker bearings are simultaneously moved along the spindle axis, namely counter to each other, so that an adjustment of the distance of the frame-fixed bearings of the rockers only with a displacement of the virtual pivot axis in the direction of the coupling or opposite thereto goes along and not additionally with a lateral displacement of the virtual pivot axis.
  • a pressing device for pressing the active surface of the finishing tool is provided on the workpiece surface, in particular along an axis extending radially to the virtual pivot axis. In this way, it is ensured that the effective surface of the finishing tool even with longer movement paths (movement is equal arc length between the reversal points of the oscillating pivoting movement) of the effective surface of the finishing tool rests against the workpiece surface.
  • the finishing tool is slidably mounted along an axis and that the axis extends radially relative to the virtual pivot axis.
  • the drive device comprises a motor drive acting on the coupling and that a movement of the coupling thus generated is transmitted from the coupling to the two wings.
  • the motor drive is preferably an eccentric drive. This has the advantage that a continuous rotational movement can be implemented in a simple manner in an oscillating oscillatory motion.
  • the finishing tool holder or the coupling has a receiving space for receiving an eccentric, which is movable within the receiving space in a direction transverse to the longitudinal extent of the coupling. This has the advantage that a drive movement of the eccentric drive is converted directly into an oscillating movement of the coupling, which runs substantially tangentially to the workpiece surface to be machined.
  • the eccentric one by one Has roller formed contact surface. This preferably cooperates with a wall of the receiving space described above.
  • the invention also relates to a method of operating the device described above. Advantages and embodiments of the method have already been described above with reference to the device according to the invention. Therefore, with respect to the advantages and embodiments of the method according to the invention reference is made to the above description.
  • FIG. 1 An embodiment of a device 10 for finishing a workpiece surface is shown in FIG. 1 represented and designated overall by the reference numeral 10.
  • the device 10 has a stationary frame 12, which, for example, can be attached to the machine frame of a (not shown) machine tool.
  • the device 10 comprises a finishing tool holder 14 for holding a finishing tool 16, in particular in the form of a finishing stone 18.
  • the finishing tool 16 has an active surface 20. This effective surface has a curvature corresponding to the curvature of a workpiece to be machined.
  • the finishing tool 16 is slidably mounted on the finishing tool holder 14 along an axis 22.
  • a pressing device 24 is provided, which in FIG. 1 is shown schematically.
  • the pressing device 24 includes, for example, pneumatic cylinders, which exert pressure forces directed parallel to the axis 22 on the finishing tool 16, so that the active surface 20 of the finishing tool is pressed against a workpiece surface to be machined.
  • a drive device designated as a whole by the reference numeral 26 is provided.
  • the drive device 26 comprises a motor drive 28 for the rotary drive of an eccentric described in more detail below.
  • the motor drive 28 is firmly connected to the frame 12.
  • the drive device 26 also includes a four-link chain. This is composed of the frame 12, two wings 32 and 34 and a coupling 36 together.
  • the first rocker 32 is pivotally mounted to the frame 12 by means of a first rocker arm 36 fixed to the frame.
  • the second rocker 34 is pivotally mounted on the frame 12 via a second, frame-fixed rocker bearing 38.
  • the rockers 32 and 34 are connected via coupling-resistant rocker bearings 40 and 42 rotatably connected to the coupling 36.
  • An imaginary axis 44 extending through the coupling-fixed rocker bearings 40 and 42 runs essentially parallel to an imaginary axis 46, which runs through the frame-fixed rocker bearings 36 and 38.
  • the coupling 36 serves for fastening the finishing tool holder 14, which moves together and uniformly with the coupling 36 during operation of the drive device 26.
  • the frame-fixed swing bearings 36 and 38 are not fixed to the frame 12. Rather, as seen along the axis 46, a distance between the frame-fixed swing bearings 36 and 38 adjustable. For this purpose, a Abstandeinstell issued 48 is provided.
  • the distance adjusting device 48 comprises a spindle carrier 50 fixedly connected to the frame 12 for rotational mounting of a spindle 54 extending along a spindle axis 52.
  • the spindle axis 52 preferably extends parallel to the axis 46.
  • the spindle carrier 50 is preferably arranged along the spindle axis 52 at the same height as the finishing tool holder 14.
  • the spindle 54 has threads, namely a first thread 56 and a second thread 58.
  • the threads 56 and 58 are preferably in opposite directions and each cooperate with an associated rocker bearing carrier 60, 62.
  • the swing bearing supports 60 and 62 are displaceable along a guide 64 and mounted parallel to the spindle axis 52 on the frame 12.
  • Each of the swing bearing supports 60 and 62 serves to dispose one of the swing arm bearings 36 and 38 fixed to the frame.
  • a spindle drive 66 is provided, for example, for a manual drive in the form of a hand wheel 68 or in the form of a (not shown) to motor spindle drive.
  • the motor drive 26 serves to drive a drive part 70 about a rotary drive axis 72.
  • the drive part 70 is non-rotatably connected to an eccentric 74 whose eccentric axis 76 is offset by a dimension 78 relative to the rotary drive axis 72.
  • the eccentric 74 comprises a roller 80, which is arranged in a receiving space 82 and with a contact surface 84 (see. FIG. 5 ) abuts a boundary 86 of the receiving space 82 and thus a rotational movement of the motor drive 26 in a oscillating movement of the coupling 36 along the axis 44 translated. This oscillating movement is in the FIGS. 6 and 7 indicated by a double arrow 92 of the finishing tool holder 14.
  • a workpiece 84 is shown in sections.
  • the workpiece 84 is rotationally symmetrical with respect to an axis 86 and has a workpiece surface 88 that is to be machined and convexly curved in the profile.
  • the effective surface 20 provided on the finishing stone has a curvature corresponding to the curvature of the workpiece surface 88.
  • the workpiece 84 is driven about the axis of rotation 86 in the direction of rotation.
  • a schematically shown rotary drive 90 is provided.
  • the rotational movement of the workpiece 84 is superimposed on the oscillation movement 92 indicated by the double arrow of the finish tool holder 14, which movement runs tangentially to the profile of the workpiece surface 88.
  • FIG. 6 a configuration of the device 10 is shown in which a distance 94 of the frame-fixed rocker bearings 36 and 38 is greater than a distance 96 of the coupling-fixed rocker bearings 40 and 42.
  • a virtual pivot axis 98 of the active surface 20 of the finishing stone 18 with respect to the workpiece surface 88 to be machined is arranged on a side facing away from the frame 12.
  • the active surface 20 of the finishing stone 18 moves about the virtual pivot axis 98.
  • a radius 100 of the pivoting movement corresponds to the radius of the profile of the convex workpiece surface 88th
  • the distance 94 between the fixed rocker bearings 36 and 38 is adjustable.
  • FIG. 7 a configuration of the device 10 is shown in which the distance 94 between the frame-fixed rocker bearings 36 and 38 is smaller than the distance 96 between the coupling-fixed rocker bearings 40 and 42.
  • This configuration is selected for workpieces 102 which have a profile surface concavely curved in profile exhibit. This allows finish machining of the workpiece 102, in which the active surface 20 of the finishing stone 18 is pivoted back and forth about a virtual pivot axis 98 with a radius 106 of the profile of the workpiece surface 104 to be machined.
  • the virtual pivot axis 98 is arranged on the side of the frame 12 with respect to the workpiece surface to be machined in this configuration.
  • the distance 94 it is also conceivable to set the distance 94 so that it is equal to the distance 96.
  • the virtual pivot axis 98 shifts to an infinite distance from the device 10 area. This allows the use of the device 10 as a linear oscillator, in which a (non-curved) active surface 20 of a finishing stone 18 is pivoted parallel to a non-curved in profile workpiece surface.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP13192497.9A 2013-11-12 2013-11-12 Dispositif de traitement de finition d'une surface de pièce courbée et procédé de fonctionnement du dispositif Active EP2871024B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13192497.9A EP2871024B1 (fr) 2013-11-12 2013-11-12 Dispositif de traitement de finition d'une surface de pièce courbée et procédé de fonctionnement du dispositif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13192497.9A EP2871024B1 (fr) 2013-11-12 2013-11-12 Dispositif de traitement de finition d'une surface de pièce courbée et procédé de fonctionnement du dispositif

Publications (2)

Publication Number Publication Date
EP2871024A1 true EP2871024A1 (fr) 2015-05-13
EP2871024B1 EP2871024B1 (fr) 2016-02-03

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EP13192497.9A Active EP2871024B1 (fr) 2013-11-12 2013-11-12 Dispositif de traitement de finition d'une surface de pièce courbée et procédé de fonctionnement du dispositif

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EP (1) EP2871024B1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997000155A1 (fr) * 1995-06-16 1997-01-03 Optical Generics Limited Procede de polissage optique et appareil associe
EP0936028A2 (fr) 1998-02-09 1999-08-18 Supfina Grieshaber GmbH & Co. Dispositif de superfinition de surfaces usinées
DE102008046451A1 (de) 2008-09-09 2010-03-11 Thielenhaus Technologies Gmbh Vorrichtung zur mechanischen Finishbearbeitung von Umfangsflächen an rotationssymmetrischen Werkstücken, insbesondere Wälzlagerringen
JP2010052082A (ja) * 2008-08-27 2010-03-11 Seibu Jido Kiki Kk 研削装置
EP2596907A1 (fr) 2011-11-28 2013-05-29 Supfina Grieshaber GmbH & Co. KG Dispositif de finition d'une surface de pièce usinée incurvée

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997000155A1 (fr) * 1995-06-16 1997-01-03 Optical Generics Limited Procede de polissage optique et appareil associe
EP0936028A2 (fr) 1998-02-09 1999-08-18 Supfina Grieshaber GmbH & Co. Dispositif de superfinition de surfaces usinées
JP2010052082A (ja) * 2008-08-27 2010-03-11 Seibu Jido Kiki Kk 研削装置
DE102008046451A1 (de) 2008-09-09 2010-03-11 Thielenhaus Technologies Gmbh Vorrichtung zur mechanischen Finishbearbeitung von Umfangsflächen an rotationssymmetrischen Werkstücken, insbesondere Wälzlagerringen
EP2596907A1 (fr) 2011-11-28 2013-05-29 Supfina Grieshaber GmbH & Co. KG Dispositif de finition d'une surface de pièce usinée incurvée

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Publication number Publication date
EP2871024B1 (fr) 2016-02-03

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