EP2218545A1 - Dispositif et procédé de traitement précis d'une surface de pièce usinée à rotation symétrique - Google Patents

Dispositif et procédé de traitement précis d'une surface de pièce usinée à rotation symétrique Download PDF

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Publication number
EP2218545A1
EP2218545A1 EP09001999A EP09001999A EP2218545A1 EP 2218545 A1 EP2218545 A1 EP 2218545A1 EP 09001999 A EP09001999 A EP 09001999A EP 09001999 A EP09001999 A EP 09001999A EP 2218545 A1 EP2218545 A1 EP 2218545A1
Authority
EP
European Patent Office
Prior art keywords
workpiece
pressing
axis
rotation
guide
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
EP09001999A
Other languages
German (de)
English (en)
Other versions
EP2218545B1 (fr
Inventor
Jürgen Roser
Daniel Welle
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 EP20090001999 priority Critical patent/EP2218545B1/fr
Publication of EP2218545A1 publication Critical patent/EP2218545A1/fr
Application granted granted Critical
Publication of EP2218545B1 publication Critical patent/EP2218545B1/fr
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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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/067—Work supports, e.g. adjustable steadies radially supporting workpieces

Definitions

  • the invention relates to a device for fine or ultra-fine machining of a rotationally symmetrical workpiece surface of a workpiece, with a drive device for driving the workpiece about an axis of rotation, with respect to the axis of rotation two effective in radial directions guide means and at least one effective in a radial direction tool, with a Pressing device for pressing the workpiece against the drive device, wherein the workpiece viewed in the direction of the axis of rotation between the drive device and the pressing device can be arranged.
  • a tool which is effective in the radial direction exerts a force on the workpiece to be machined so that, unless further measures are taken, it can move laterally relative to the axis of rotation, ie in the radial direction.
  • Another possibility is to provide only two guide means, which are spaced apart in the radial direction different from the axis of rotation. With proper coordination of the different radial distances of the guide means to the rotation axis and the rotational direction of the workpiece, it is then possible with the help of two guide means to prevent lateral migration of the workpiece.
  • the present invention seeks to provide a device of the type mentioned, which has the simplest possible structure and by means of which a workpiece can be processed gently and with high precision.
  • the pressing device is effective in a pressing plane, which is offset starting from the axis of rotation in the direction of a space in which the guide means are arranged.
  • the pressing plane is therefore positioned eccentrically relative to the axis of rotation and offset in the direction of the two guide devices.
  • This offset of the pressure level is surprisingly sufficient to generate a transverse force which presses the workpiece in the direction of the guide means.
  • the pressing plane extends parallel to the axis of rotation.
  • the pressing forces can be exerted as normal forces on a workpiece to be machined, which is pressed by the pressing device in the direction of the drive device.
  • the pressing plane extends between the axis of rotation and the guide devices. As a result, a lateral migration of the workpiece can be prevented particularly reliable.
  • the guide devices have guide surfaces for bearing against at least one radial contact surface of the workpiece and if the guide surfaces are spaced identically in the radial direction relative to the axis of rotation. This ensures that the actual axis of rotation of the workpiece and the axis of rotation of the drive device are collinear with each other. As a result, a sliding relative movement between the workpiece on the one hand and the drive device and the pressing device on the other hand prevented, so that the workpiece is mounted particularly wear in contact areas to the drive device and the pressing device.
  • the device can be set up particularly easily before the machining of a workpiece, in particular a series of workpieces, since it is possible to set a distance between the guide surfaces and the axis of rotation with the aid of only one workpiece and / or only one reference part.
  • the guide surfaces are rotatably mounted, so that the guide surfaces roll on the system surface of the workpiece on this when resting. This allows a particularly gentle contact of the guide means with the contact surface of the workpiece.
  • the guide surfaces are arranged mirror-symmetrically with respect to a plane of symmetry which is spanned by the rotation axis and a direction perpendicular to the pressure plane. As a result, the workpiece is held by the direction of rotation independently and reliably in the radial direction.
  • the pressing device has at least one pressing surface for abutment against a front-side contact surface of the workpiece, so that high pressure forces can be exerted in the direction of the drive device.
  • the at least one pressing surface is rotatably mounted, so that the pressure surface rolls on the front-side contact surface of the workpiece on this at the plant. As a result, a particularly gentle contact between the pressing device and the workpiece is made possible.
  • the pressing device has at least two pressing surfaces for abutment against a front-side contact surface of the workpiece.
  • the front-side abutment surface of the workpiece is circular or annular, so that the pressing surfaces rest on relatively spaced circular surface portions or annular surface portions or can be applied to this.
  • the pressing surfaces are arranged mirror-symmetrically with respect to a plane of symmetry which is spanned by the axis of rotation and a direction perpendicular to the pressing plane.
  • the at least one pressing surface is movable in a direction parallel to the axis of rotation in the direction of the drive device and opposite thereto. This makes it possible to further space the pressing surface further from the drive device in order to be able to introduce a workpiece into a workpiece space between the drive device and the pressure device. After introduction of the workpiece, the pressing surface can then be moved in the direction of the workpiece until the pressing surface comes into contact with the workpiece and this is pressed against the drive device. After machining the workpiece, the pressure surface can be lifted off the workpiece again to allow easy removal of the workpiece.
  • the at least one pressing surface is mounted on a carrier, which is pivotable about an axis perpendicular to the axis of rotation carrier axis.
  • the pivoting of the pressing surface about a carrier axis makes it possible to move the pressing surface along a circular arc so that only a component of the movement of the pressing surface extends in a direction parallel to the axis of rotation in the direction of the pressing plane. This allows a particularly gentle and precise installation of the Andschreib modelling an end-side contact surface of the workpiece.
  • the carrier is mounted on a linear drive which is movable in a direction parallel to the axis of rotation in the direction of the drive means and for this opposite. This makes it possible to generate the pressure forces to be exerted in the direction of the drive device by means of the linear drive.
  • the device for fine or ultra-fine machining is a finishing device with a finishing tool, in particular a finishing stone.
  • the invention further relates to a method for fine or ultra-fine machining of a rotationally symmetrical workpiece surface of a workpiece, with a drive device for driving the workpiece about an axis of rotation, with respect to the axis of rotation two effective in radial directions guide means and at least one effective in a radial direction tool with a pressing device for pressing the workpiece against the drive device, wherein the workpiece is arranged in the direction of the axis of rotation between the drive device and the pressing device, wherein the pressing device is positioned in a pressing plane, which is offset from the axis of rotation in the direction of a space in which the guide means are arranged.
  • a first embodiment of a device for fine or ultra-fine machining is in the FIG. 1 represented and designated there by the reference numeral 10.
  • the device 10 is in particular a device for finish machining a workpiece.
  • the device 10 comprises a drive unit 12 which is arranged on the base side and which serves to drive a workpiece 14 about an axis of rotation 16.
  • the drive device 12 comprises a workpiece carrier 18, on which the workpiece 14 can be placed with a bottom-side end face.
  • the workpiece 14 can be driven by frictional engagement with a contact surface of the workpiece carrier 18 about the axis of rotation 16.
  • the device 10 comprises a first guide device 20 and a second guide device 22nd
  • the guide means 20 and 22 each have a guide roller 24 and 26, which are rotatable about stationary guide roller axles 28 and 30, respectively.
  • the guide roller axles 28 and 30 extend in particular parallel to the axis of rotation 16.
  • the guide rollers 24 and 26 each have cylindrical guide surfaces 32, 34 which serve to bear against a radial abutment surface 36 of the workpiece 14.
  • the device 10 further comprises a tool 38, which is designed in particular as a finishing tool, and with which a rotationally symmetrical, radially outwardly facing workpiece surface 40 of the workpiece 14 can be processed.
  • a tool 38 which is designed in particular as a finishing tool, and with which a rotationally symmetrical, radially outwardly facing workpiece surface 40 of the workpiece 14 can be processed.
  • the workpiece 14 is an inner shell of a rolling bearing and the workpiece surface 40 is a bearing surface for a rolling element.
  • the device 10 further comprises a pressure device, generally designated by 42, which serves to press the workpiece 14 from above in the direction of the drive device 12, in particular against the tool carrier 18.
  • the pressing device 42 comprises a linear drive 44, which is preferably designed as an electric drive with a servo motor.
  • the linear drive 44 comprises a spindle 46 for driving a carriage 48, which can be stopped along the spindle axis ("NC axis") in different positions.
  • the carriage 48 is held on a carriage carrier 50 and mounted there displaceably.
  • the carriage 48 moves in a direction parallel to the axis of rotation 16 direction.
  • the carrier 52 On the carriage 48 a designated as a total of 52 carrier is pivotally mounted.
  • the carrier 52 in particular comprises two carrier arms 54 and 56.
  • the carrier 52 with its carrier arms 54, 56 is pivotable about a carrier axis 58 which runs at an angle, in particular perpendicular to the axis of rotation 16 and is offset relative thereto ("skew arrangement of the carrier axis 58 and the rotation axis 16 ").
  • the pressing device 42 comprises at least one, preferably two pressing elements 60, 62, which are formed in particular in the form of pressure rollers.
  • the pressing elements 60, 62 are preferably rotatable about a pressing element axis 63, which in particular is oriented perpendicular to the axis of rotation 16 and offset to this.
  • the pressing elements 60 and 62 each have at least one pressing surface 64, 66, which are in particular cylindrical.
  • the first pressing surface 64 and the second pressing surface 66 are spaced apart from one another in such a way that they can be applied to different sections of an end bearing surface 68 of the workpiece 14.
  • the pressing device 42 can also be used for workpieces 14, which end face Contact surfaces 68 of different sizes, in particular with different outer diameters, have.
  • the pressing surfaces 64 and 66 and / or the pressing surfaces 70 and 72 act in a pressing plane 74, which runs parallel to the axis of rotation 16. Within the pressing plane 74, normal forces act, which press the workpiece 14 in the direction of the workpiece carrier 18. In this case, each of the pressing elements 60, 62 is in contact with different sections of the front-side abutment surfaces 68 of the workpiece 14 along a contact line. These contact lines preferably also run within the pressing plane 74.
  • the pressing plane 74 is offset by an offset 76 in the direction of a space 78, in which the guide means 20 and 22 are arranged.
  • the offset 76 is, for example, a few millimeters, preferably at least about 1 millimeter. It is preferred if the guide devices 20, 22 and the pressing elements 60, 62 are arranged mirror-symmetrically relative to a plane of symmetry 80.
  • the plane of symmetry 80 is spanned by a direction perpendicular to the pressing plane 74 and by the axis of rotation 16.
  • the device 10 works as follows:
  • the pressing device 42 is so far away from the drive device 12 that a workpiece 14 can be placed on the workpiece carrier 18.
  • the workpiece 14 is then placed on the workpiece carrier 18 with a bottom-side workpiece surface in such a way that the radial abutment surface 36 of the workpiece 14 comes into abutment with the guide surfaces 32, 34 of the guide devices 20, 22.
  • the carriage 48 is moved by means of the linear drive 44 in the direction parallel to the axis of rotation 16 in the direction of the workpiece 14, so that the pressing elements 60 and 62 are pressed with their Andschreibdon 64, 66 against the end-side abutment surface 68 of the workpiece 14.
  • the linear drive 44 it is possible to control the linear drive 44 so that the pressing surfaces 64 and 66 of the pressing elements 60 and 62 are initially spaced from the end face 68 of the workpiece 14 and in a next step, the support arms 54 and 56 at an angle 82 are pivoted about the support shaft 58.
  • This pivotal movement can be supported by means of a clamping module 84.
  • the pressing elements 60, 62 move along a circular arc 86, so that the pressing surfaces 64 and 66 are particularly gentle and can be applied precisely to the frontal contact surface 68 of the workpiece 14.
  • the offset 76 between the pressing plane 74 and the axis of rotation 16 in the direction of the guide means 20 and 22 results in rotational drive of the workpiece 14, a force which presses the workpiece 14 against the guide means 20 and 22.
  • a lateral deflection of the workpiece 14 is excluded, so that the machined rotationally symmetrical workpiece surface 40 of the workpiece 14 by means of the tool 38 can be processed very accurately.
  • machining of the workpiece surface 40 with the aid of the tool 38 generates a machining force which presses the workpiece 14 in the direction of the guide devices 20, 22.
  • FIGS. 5 to 8 illustrated second embodiment of a device 10 for fine or ultra-fine machining of a rotationally symmetrical workpiece surface 40 has a to the above with reference to the FIGS. 1 to 4 described first embodiment of a device 10 of similar construction. Therefore, only the differences from the above-described first embodiment of the device 10 will be discussed below.
  • the second embodiment of the device 10 has a tool 38, which is positioned within the annular workpiece 14, so that a radially inwardly facing workpiece surface 40 of the workpiece 14 is machinable.
  • the workpiece 14 is an outer shell of a roller bearing and the workpiece surface 40 is a bearing surface for a rolling element.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP20090001999 2009-02-13 2009-02-13 Dispositif et procédé de traitement précis d'une surface de pièce usinée à rotation symétrique Active EP2218545B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20090001999 EP2218545B1 (fr) 2009-02-13 2009-02-13 Dispositif et procédé de traitement précis d'une surface de pièce usinée à rotation symétrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20090001999 EP2218545B1 (fr) 2009-02-13 2009-02-13 Dispositif et procédé de traitement précis d'une surface de pièce usinée à rotation symétrique

Publications (2)

Publication Number Publication Date
EP2218545A1 true EP2218545A1 (fr) 2010-08-18
EP2218545B1 EP2218545B1 (fr) 2011-08-24

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2076348A1 (fr) * 2006-10-02 2009-07-08 StarragHeckert AG Procédé de verrouillage de pièces utilisées pour la production de roues de compresseur ou de turbine
CN103302584A (zh) * 2013-06-27 2013-09-18 新乡莱必泰机械有限公司 高效强迫式直线自动装卸工件的传动机构
EP2676770A1 (fr) 2012-06-18 2013-12-25 Supfina Grieshaber GmbH & Co. KG Dispositif de traitement précis ou ultra-précis d'une surface à rotation symétrique d'une pièce à usiner
EP3450102A1 (fr) * 2017-08-31 2019-03-06 WENDT GmbH Fixation par serrage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4306382A (en) 1979-05-25 1981-12-22 Ueda Giken Co. Ltd. Grinding machine
US5213348A (en) * 1990-11-28 1993-05-25 Bryant Grinder Corporation Workpart chuck positioning mechanism with independent shoes
DE102004052342A1 (de) 2004-10-27 2006-05-04 Emag Maschinenfabrik Gmbh Verfahren zum Synchronstützschleifen und Synchronschleifmaschine
EP1952942A1 (fr) * 2007-02-01 2008-08-06 EMAG Holding GmbH Machine-outil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4306382A (en) 1979-05-25 1981-12-22 Ueda Giken Co. Ltd. Grinding machine
US5213348A (en) * 1990-11-28 1993-05-25 Bryant Grinder Corporation Workpart chuck positioning mechanism with independent shoes
DE102004052342A1 (de) 2004-10-27 2006-05-04 Emag Maschinenfabrik Gmbh Verfahren zum Synchronstützschleifen und Synchronschleifmaschine
EP1952942A1 (fr) * 2007-02-01 2008-08-06 EMAG Holding GmbH Machine-outil

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2076348A1 (fr) * 2006-10-02 2009-07-08 StarragHeckert AG Procédé de verrouillage de pièces utilisées pour la production de roues de compresseur ou de turbine
EP2676770A1 (fr) 2012-06-18 2013-12-25 Supfina Grieshaber GmbH & Co. KG Dispositif de traitement précis ou ultra-précis d'une surface à rotation symétrique d'une pièce à usiner
CN103302584A (zh) * 2013-06-27 2013-09-18 新乡莱必泰机械有限公司 高效强迫式直线自动装卸工件的传动机构
CN103302584B (zh) * 2013-06-27 2015-09-30 新乡莱必泰机械有限公司 高效强迫式直线自动装卸工件的传动机构
EP3450102A1 (fr) * 2017-08-31 2019-03-06 WENDT GmbH Fixation par serrage

Also Published As

Publication number Publication date
EP2218545B1 (fr) 2011-08-24

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