EP0640436A1 - Procédé et appareil pour finir par meulage des pièces métalliques préusinées de forme annulaire - Google Patents

Procédé et appareil pour finir par meulage des pièces métalliques préusinées de forme annulaire Download PDF

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Publication number
EP0640436A1
EP0640436A1 EP94112620A EP94112620A EP0640436A1 EP 0640436 A1 EP0640436 A1 EP 0640436A1 EP 94112620 A EP94112620 A EP 94112620A EP 94112620 A EP94112620 A EP 94112620A EP 0640436 A1 EP0640436 A1 EP 0640436A1
Authority
EP
European Patent Office
Prior art keywords
ring
tool
grinding
grinding tool
workpiece
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.)
Withdrawn
Application number
EP94112620A
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German (de)
English (en)
Inventor
Martin Dipl.-Ing. Wolters
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.)
Ernst Thielenhaus GmbH and Co KG
Original Assignee
Ernst Thielenhaus 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 Ernst Thielenhaus GmbH and Co KG filed Critical Ernst Thielenhaus GmbH and Co KG
Publication of EP0640436A1 publication Critical patent/EP0640436A1/fr
Withdrawn legal-status Critical Current

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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
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/16—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings

Definitions

  • the invention relates to a method for fine grinding of pre-machined, annular disk-shaped metallic workpieces, in particular of motor vehicle brake disks with a brake disk cup and an annular disk-shaped brake disk ring, in which a workpiece holder is driven in rotation about a workpiece holder axis and a grinding tool holder from a drive shaft about a workpiece holder axis essentially parallel grinding tool holder axis is driven in rotation.
  • the invention furthermore relates to a device for carrying out the method according to the invention.
  • Pre-processing of the annular disk-shaped workpieces, in particular the motor vehicle brake disks means in the context of the invention that the workpieces have their final design geometry, in particular with regard to the thickness of the disks and the parallelism of the disk surfaces, by machining, eg. B. have experienced on a lathe.
  • This cutting shape has left processing marks on the surface, for example spiraling processing marks.
  • these interfere from a functional point of view. They interfere in particular with motor vehicle brake disks and impair the reproducibility and safety of the braking process. Corrective fine grinding of the pre-machined workpieces in the form of annular disks is therefore generally required.
  • the grinding tool holder is acted upon by a central helical spring, which presses the ring with the ball-joint-shaped design against the joint ball.
  • the joint ball shows two diametrically opposite pins, which are arranged orthogonal to the axis of the drive shaft and are guided in elongated holes in the sleeve-shaped hub. In this way, the grinding tool holder is pressed back during the grinding process under the influence of the grinding pressure against the action of the coil spring.
  • the ball joint loses its joint function during the grinding process: the joint ball released from the ring with the shape of a spherical joint shell can move in an uncontrolled manner according to the fit of its pins in the elongated holes, if only within narrow limits.
  • the invention is based on the technical problem of specifying a method of the type mentioned at the outset with which the machined is achieved in a relatively inexpensive manner Workpieces with regard to the machined surfaces also meet extremely high quality requirements. Furthermore, the invention is based on the technical problem of specifying a device for carrying out the method according to the invention.
  • the invention teaches a method for the fine grinding of pre-machined, annular disk-shaped metallic workpieces, in particular.
  • Motor vehicle brake disks with a brake disk cup and an annular disk-shaped brake disk ring in which a workpiece holder is driven in rotation about a workpiece holder axis and a grinding tool holder from a drive shaft around one Workpiece holder axis is driven essentially parallel to the grinding tool holder axis, in which work is carried out with a grinding tool designed as a ring tool with an annular grindstone and in which the ring tool is subjected to a ball joint-free sequence control on the workpiece to be ground and, in addition, is resiliently flexible on the drive shaft of the grinding tool holder is connected so that the workpiece holder axis and the grinding tool holder axis are skewed to each other by the sequence control lll be.
  • a ring tool designed as a pot tool is used.
  • the invention is based on the surprising fact that a particularly precise and functionally reliable fine grinding is achieved within the scope of the method according to the invention, which leads to high surface qualities of the machined tools, without the fact that structures are only produced by the fine grinding process when the ring tool is connected to a ball joint-free sequence control subject to the workpiece to be ground and for this purpose is connected to the drive shaft of the grinding tool holder in a fully elastic manner.
  • the ring tool is subjected to a sequential control on the workpiece to be ground, it is expressed that the surface of the ring-shaped workpiece performs the orientation or deflection of the ring tool that is possible due to the resilience which is elastic on all sides, in accordance with its surface inaccuracies.
  • the ring tool is floating as it were due to the elastic flexibility on all sides and guides itself on the surface to be ground.
  • the fact that the workpiece-receiving axis and the grinding tool-receiving axis can be placed skewed to one another due to the all-round elastic compliance means that the grinding tool-receiving axis with respect to the elastic compliance in all spatial directions.
  • the workpiece holder axis can be tilted. Windschief means that the orientations of the grinding tool holder axis are not determined by one or a few planes. In the method according to the invention, the grinding tool holder axis can be referenced.
  • the axis of the drive shaft for the grinding tool holder can be arranged as desired on the conical surface, the maximum angle between the conical surface and the Axis of the drive shaft is determined by the degree of elastic compliance.
  • the number of degrees of flexibility or freedom of movement of the grinding tool holder is considerably increased in comparison to the known measures, and constraints that can lead to the generation of disruptive structures during the fine grinding process are avoided.
  • the fact that the ring tool is flexibly and flexibly connected to the drive shaft of the grinding tool receptacle effectively prevents loose seating of the ring tool and the associated uncontrolled movements and resulting chatter mark-like structures on the machined surfaces.
  • the grinding tool is not a full-surface grinding wheel, but rather a ring tool with an annular grindstone, in the preferred embodiment of the invention a pot tool. Due to the resilience of the ring tool, which is elastic on all sides, it is also achieved that wear of the grinding surface of the grinding stone takes place only relatively slowly and the method thus ensures a relatively long service life of the grinding tool. If the ring tool protrudes beyond the workpiece, the ring tool is also self-sharpened. In this respect, the method according to the invention is also characterized by particular economy.
  • the invention also relates to an apparatus for carrying out the method described, with a workpiece holder axis rotating workpiece holder and a grinding tool holder connected to a drive shaft and rotating around a grinding tool holder axis which is essentially parallel to the workpiece holder axis, in which the grinding tool is a ring tool with an annular grindstone which, during the grinding process, protrudes outside over the edge of the ring-shaped workpiece , in which rubber-elastic supporting elements are arranged between the ring tool and the end face of the drive shaft for the grinding tool receptacle, in which the drive shaft for the grinding tool holder has a central round pin on its end face, which grips through the rubber-elastic supporting elements and surrounds it in a recess of the ring tool with radial play and in which the ring tool is attached to the inside of the ring with the interposition of rubber-elastic elements on the end face of the round pin.
  • the rubber-elastic support elements between the ring tool and the end face of the drive shaft are preferably an annular disk which surrounds the central round pin.
  • the ring tool is designed as a pot tool and at least one mounting plate covering the recess of the ring tool is provided on the inside of the cup, which is attached to the end face of the round pin with the interposition of the rubber-elastic elements likewise covering the recess.
  • the attachment to the round pin is expediently carried out with one on the axis the drive shaft arranged screw.
  • the rubber-elastic elements then preferably consist of an annular disk which surrounds the screw.
  • the invention also relates to a further embodiment of a device for carrying out the method according to the invention, in which the ring tool is constructed from a tool carrier and the annular grinding stone fastened thereon, in which rubber-elastic supporting elements are arranged between the tool carrier and the end face of the drive shaft for the grinding tool holder, in which a central round pin on the end face of the drive shaft grips through the rubber-elastic supporting elements and surrounds them in a recess in the tool carrier with radial play and in which the tool carrier with the rubber-elastic supporting elements and at radial spacing from the round pin at regular angular intervals arranged fastening elements on the front side of the Drive shaft is attached, wherein the fasteners grasp the tool carrier with radial play and on the bearing surface between the fastener and Tool carriers are interposed rubber-elastic elements.
  • the fastening elements are expediently screws and the rubber-elastic elements are provided between the screw head and the tool carrier.
  • the rubber-elastic components used in the device according to the invention can be arranged under prestress. Their shore hardness is adapted to the special conditions.
  • the rubber-elastic components used in the context of the device according to the invention in connection with the radial play effectively achieve a resilience of the ring tool that is elastic on all sides.
  • the rubber-elastic support ensures that the ring tool or the grinding tool holder, in contrast to the known device (US 3,456,401), does not sit loosely on the drive shaft and thus there are no uncontrolled movements which produce chatter-mark-like structures on the machined surfaces.
  • the extent of the skewed orientation of the grinding tool mounting axis and workpiece mounting axis is determined on the one hand by the resilience of the rubber-elastic components and on the other hand by the radial play between the round pin and ring tool or between the fastening elements and tool holder.
  • the annular grindstone is designed as a closed slip ring.
  • the ring-shaped grindstone can also be designed in the form of individual slip ring sections and sections free of abrasive. Since, according to the teaching of the invention, the ring-shaped grindstone protrudes on the outside over the edge of the ring-shaped workpiece during the grinding process, a self-grinding process on the grindstone takes place when this rotating ring tool is placed on the surface of the already rotating workpiece to be ground. The result of this is that, in the device according to the invention, inaccuracies, even with a long operating time which are based on the fact that the ring tool is working through, cannot occur.
  • a workpiece 1 is held in a workpiece holder (not shown) rotating about a workpiece holder axis .
  • a grinding tool holder 4 is driven by a drive shaft 5 to rotate about a grinding tool holder axis substantially parallel to the workpiece holder axis.
  • a ring tool 6 with an annular grindstone 7 is used as the grinding tool, according to the preferred embodiment of the invention and the exemplary embodiment according to FIG. 1, a pot tool.
  • the ring-shaped grindstone protrudes on the outside over the edge of the ring-shaped workpiece.
  • the ring tool 6 is subjected to a ball joint-free sequence control on the workpiece 1 to be ground and is connected to the drive shaft 5 of the grinding tool holder 4 so that it is resilient on all sides so that the workpiece holder axis and the grinding tool holder axis can be set skewed to one another by the sequence control .
  • a possible orientation of the grinding tool holder axis is indicated by dashed lines in FIG. 1. The following measures are implemented in detail in the devices according to the invention:
  • rubber-elastic supporting elements 8 are arranged between the ring tool 6 and the end face of the drive shaft 5 for the grinding tool holder 4.
  • these rubber-elastic support elements 8 consist of an annular disk.
  • the drive shaft 5 for the grinding tool receptacle 4 has on its end face a central round pin 9 which passes through the rubber-elastic supporting elements 8, in the exemplary embodiment the annular disc, and surrounds them in a recess 10 of the ring tool 6 with radial play.
  • a radial play is also set up between the rubber-elastic support elements 8 and the round pin 9.
  • the ring tool 6 is fastened on the inside of the ring with the interposition of rubber-elastic elements 11 on the end face of the round pin 9.
  • the ring tool is designed as a pot tool and at least one mounting plate 12 covering the recess 10 of the ring tool 6 is provided on the inside of the pot.
  • the mounting plate 12 is fastened to the end face of the round pin 9 with the interposition of the rubber-elastic elements also covering the recess 10.
  • the rubber-elastic elements 11 consist of a mounting rubber washer, which preferably has the same diameter as the mounting plate 12.
  • the mounting plate 12 is fastened to the end face of the round pin 9 with the aid of a screw 13.
  • the ring tool 6 is constructed from a tool carrier 14 and the annular grinding stone 7 fastened thereon.
  • Rubber-elastic supporting elements 8, preferably in the form of an annular disk, are provided between the tool carrier 14 and the end face of the drive shaft 5.
  • a central round pin 9 on the end face of the drive shaft 5 passes through the rubber-elastic support elements 8 and engages in a recess 10 of the tool carrier 14 with radial play.
  • the tool carrier 14 is fastened to the end face of the drive shaft 5 with screws 15, which pass through the rubber-elastic supporting elements 8 and are arranged at a radial distance from the round pin 9 at regular angular intervals in the tool carrier 14.
  • the tool carrier 14 is provided with three screws 15, each offset by 120 °, on the end face of the drive shaft 5 attached.
  • the screws 15 each pass through the tool carrier 14 with radial play.
  • radial play is also established between the rubber-elastic support elements 8 and the screws 15.
  • Rubber-elastic elements 17 are arranged between the screw heads 16 and the tool carrier 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP94112620A 1993-08-28 1994-08-12 Procédé et appareil pour finir par meulage des pièces métalliques préusinées de forme annulaire Withdrawn EP0640436A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4328987A DE4328987C1 (de) 1993-08-28 1993-08-28 Verwendung einer Schleifvorrichtung zum Feinschleifen von Kraftfahrzeugbremsen
DE4328987 1993-08-28

Publications (1)

Publication Number Publication Date
EP0640436A1 true EP0640436A1 (fr) 1995-03-01

Family

ID=6496255

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94112620A Withdrawn EP0640436A1 (fr) 1993-08-28 1994-08-12 Procédé et appareil pour finir par meulage des pièces métalliques préusinées de forme annulaire

Country Status (4)

Country Link
US (1) US5507686A (fr)
EP (1) EP0640436A1 (fr)
DE (1) DE4328987C1 (fr)
ES (1) ES2069517T1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19513383A1 (de) * 1995-04-08 1996-10-10 Supfina Grieshaber Gmbh & Co Vorrichtung zum beidseitigen Feinstbearbeiten eines Werkstücks

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5915502A (en) * 1997-02-27 1999-06-29 Varga North America, Inc. Brake disc assembly and a method for fabricating brake disc
US5951378A (en) * 1997-08-07 1999-09-14 Norton Company Method for grinding bimetallic components
AT409469B (de) * 1998-11-10 2002-08-26 Swarovski Tyrolit Schleif Spanneinrichtung für schleifscheiben
FR2795667B1 (fr) * 1999-07-02 2001-10-12 Essilor Int Outil de lissage pour surface optique, en particulier pour lentille ophtalmique
DE20207427U1 (de) 2002-05-10 2002-10-10 Müller, Michael, 96231 Bad Staffelstein Schleifvorrichtung
JP4846297B2 (ja) * 2005-08-03 2011-12-28 Ｎｔｎ株式会社 ブレーキディスクの制動面加工装置
JP4876669B2 (ja) * 2006-03-29 2012-02-15 株式会社ジェイテクト 車輪用転がり軸受装置の製造方法
MX2011001443A (es) 2008-08-08 2011-04-11 Saint Gobain Abrasives Inc Herramientas abrasivas que tienen una fase de metal continua para unir un componente abrasivo a un portador.
US9097067B2 (en) * 2009-02-12 2015-08-04 Saint-Gobain Abrasives, Inc. Abrasive tip for abrasive tool and method for forming and replacing thereof
RU2562556C2 (ru) 2009-12-31 2015-09-10 Сэнт-Гобэн Эбрейзивс, Инк. Абразивное изделие
PL3199300T3 (pl) * 2010-07-12 2020-09-21 Saint-Gobain Abrasives, Inc. Artykuł ścierny do kształtowania materiałów przemysłowych
DE102014215060B4 (de) 2013-09-20 2018-03-22 Ford Global Technologies, Llc Verfahren zur Herstellung einer Bremsscheibe
US9879536B2 (en) 2015-12-21 2018-01-30 General Electric Company Surface treatment of turbomachinery
DE102021208965A1 (de) * 2021-08-16 2023-02-16 HPL Technologies GmbH Werkstück zum Beschichten mit einer Veredelungsschicht, sowie ein Einmessverfahren für ein Werkstück

Citations (4)

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US2717478A (en) * 1952-09-30 1955-09-13 Berne Tocci Guilbert Grinding machine
US3040485A (en) * 1959-07-16 1962-06-26 Tocci-Guilbert Berne Resilient coupling
US3473269A (en) * 1967-05-05 1969-10-21 La Salle Machine Tool Grinding apparatus
DE3031772A1 (de) * 1980-08-22 1982-04-29 Nikolaj Georgievič Bobovnikov Vorrichtung zum schleifputzen von werkstueckrohlingen

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US3136100A (en) * 1962-07-11 1964-06-09 Norton Co Grinding wheel
US3456401A (en) * 1965-08-30 1969-07-22 Ammco Tools Inc Brake disc grinder
US3469351A (en) * 1966-04-15 1969-09-30 Ernst Thielenhaus Mas Fab Fa Method of and apparatus for machining disk-shaped workpieces
US3456399A (en) * 1966-11-16 1969-07-22 Corning Glass Works Pressure chuck
US3716951A (en) * 1971-05-05 1973-02-20 K Walters Cup grinding wheels
US3912411A (en) * 1971-09-22 1975-10-14 Robert H Moffat Thread latching mechanism
ZA755807B (en) * 1975-09-11 1977-04-27 Edenvale Eng Works The mounting of grinding wheels
JPS5537289A (en) * 1978-06-29 1980-03-15 Gramlich Hans Reepolishing method of brake disc for car and its polishing device
US4285167A (en) * 1979-12-07 1981-08-25 Sandvik Coastal Inc. Arbor for mounting tools in a chuck
US4306383A (en) * 1980-02-25 1981-12-22 Ingersoll-Rand Company Grinding wheel with energy absorbing device
US4766702A (en) * 1985-07-25 1988-08-30 James Kinner Disk brake grinder
DE3911719A1 (de) * 1989-04-11 1990-10-25 Thielenhaus Maschf Anlage zum schleifen, insbesondere feinschleifen, von bremsscheiben
US5056266A (en) * 1990-01-04 1991-10-15 Norris Bobby D Rotary brake rotor resurfacer
US5031363A (en) * 1990-08-10 1991-07-16 Thiem Eugene G Hand held non-directional disc brake rotor finishing device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2717478A (en) * 1952-09-30 1955-09-13 Berne Tocci Guilbert Grinding machine
US3040485A (en) * 1959-07-16 1962-06-26 Tocci-Guilbert Berne Resilient coupling
US3473269A (en) * 1967-05-05 1969-10-21 La Salle Machine Tool Grinding apparatus
DE3031772A1 (de) * 1980-08-22 1982-04-29 Nikolaj Georgievič Bobovnikov Vorrichtung zum schleifputzen von werkstueckrohlingen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19513383A1 (de) * 1995-04-08 1996-10-10 Supfina Grieshaber Gmbh & Co Vorrichtung zum beidseitigen Feinstbearbeiten eines Werkstücks

Also Published As

Publication number Publication date
DE4328987C1 (de) 1995-02-16
US5507686A (en) 1996-04-16
ES2069517T1 (es) 1995-05-16

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