EP1698431A1 - Appareil et méthode pour usiner les surfaces creux de pièces - Google Patents

Appareil et méthode pour usiner les surfaces creux de pièces Download PDF

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Publication number
EP1698431A1
EP1698431A1 EP06004051A EP06004051A EP1698431A1 EP 1698431 A1 EP1698431 A1 EP 1698431A1 EP 06004051 A EP06004051 A EP 06004051A EP 06004051 A EP06004051 A EP 06004051A EP 1698431 A1 EP1698431 A1 EP 1698431A1
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EP
European Patent Office
Prior art keywords
machining
workpiece
magnets
powder
flute
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Withdrawn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
EP06004051A
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German (de)
English (en)
Inventor
Wolfgang Thiel
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.)
THIEL, WOLFGANG
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1698431A1 publication Critical patent/EP1698431A1/fr
Withdrawn legal-status Critical Current

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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
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
    • 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
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B24B1/005—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes using a magnetic polishing agent

Definitions

  • the invention relates to a processing device for processing surfaces in recesses of workpieces.
  • the processing device is used in particular for machining tools with flutes and cutting edges such as twist drills, milling heads, reamers or the like.
  • the processing device has a processing body which is rotationally symmetrical about a rotation axis.
  • the machining body is on the one hand rotatably mounted for generating a rotational movement about its axis of rotation and on the other hand connected to a machining drive.
  • the processing body is formed as a magnetic head having a plurality of magnets for holding a magnetic or magnetizable, abrasive processing powder.
  • the invention relates to a method for deburring and polishing the surface of groove-shaped recesses of workpieces, in particular of cutting tools with flutes.
  • a known device for Entraten example, the flutes of cutting tools and their polish are brushing machines.
  • workpieces and tools with brushing machines necessarily and often uncontrolled and unintentionally leads to a rounding of the cutting edges. This is due to the fact that a portion of the abrasive brush hairs of a brush tuft are pressed onto the cutting edge.
  • High demands on a precise geometry of the cutting edges can not be met in the case of processing with a brushing machine.
  • Another disadvantage of such brushing machines is that the brushes wear out, so that the brushes have to be replenished at regular intervals.
  • edge deburring is known by means of a blasting process.
  • a jet of fluid such as water, is generated at high pressure.
  • An abrasive action of the blast can be enhanced by admixing abrasive materials of certain types.
  • Such a blasting method has the disadvantage that the outlay for generating the blast and the reprocessing of the substances required for the blasting is high.
  • Another disadvantage is that the treatment of the workpieces must be carried out in a closed container. This hinders the automatic workpiece supply and removal.
  • the beam For a planar polish, for example, the polishing of a flute, the beam must be guided either on this surface by additional movements of the jet nozzle, or it must be provided a plurality of jet nozzles, which are to be aligned with each other exactly. In both cases, the expenditure on equipment increases considerably, especially when tools and workpieces of different geometries are to be processed on a system.
  • a magnetabrasive grinding method is known from WO02 / 38334.
  • a processing device is described with a processing body, which is by means of a plurality of permanent magnets and pole pieces in a position to bind a magnetizable ble grinding abrasive powder as a processing powder and to lead over a surface to be machined.
  • the magnetizable grinding powder is indeed removed from the machining body by means of Magnetic force held, but behaves at the same time due to its layer thickness as an elastic tool that acts on the surfaces to be machined.
  • the force exerted by the machining powder on a respective workpiece surface can be adjusted via the distance between the workpiece surface and the magnet holding the machining powder.
  • the intensity of the cutting work performed by the machining powder on the workpiece can also be adjusted by the magnitude of the relative movement between the magnet and the surfaces to be machined.
  • the invention has for its object to provide a processing device that allows to edit wells such as grooves of workpieces or tools, the disadvantages of the prior art should be avoided as possible.
  • a processing device of the type mentioned in which a machining body is designed as a rotationally symmetrical magnetic head whose magnets are arranged such that they hold the abrasive machining powder on a rotation axis with respect to the outwardly directed surface of the magnetic body.
  • the device according to the invention also has a workpiece holder that can be positioned relative to the machining body and that is movably driven at least in one advancing or rotational direction or both, which is connected at least indirectly via corresponding positioning means and drives to the bearing of the machining body.
  • the arrangement of the magnets makes it possible to work on workpieces with depressions, such as grooves.
  • the workpiece holder allows to edit wells in a workpiece such as the flute of a spiral drill with a single machining body over the entire length of the respective groove.
  • the invention is based on the finding that the processing body known from WO07 / 38334 is designed as a cylinder, in which the magnetic field holding the processing powder is generated on one of the end sides, whereby Although this arrangement is well suited for the processing of flat or convex surfaces, but not for surfaces in recesses of workpieces. Such depressions, such as grooves, can only be processed up to the effective depth of the magnetic field. This action depth is limited by the magnetic field strength decreasing from the magnetic surface with the square of the distance. In practice, this leads to a usable effective depth of at most 3 mm. However, many workpieces and tools have recesses, for example grooves, which are deeper and therefore can not be processed with the device known from WO02 / 38334.
  • twist drills of more than 12 mm in diameter can be processed, although their flutes have a depth which is greater than 3 mm.
  • a limitation of the field of application hitherto regarded as inherent in the system according to WO02 / 38334 is canceled.
  • the corresponding magnets themselves are guided into the groove to be machined of a workpiece.
  • the immersion depth of the machining body in the groove is chosen so that the distance between the working surfaces of the magnetic head and the surfaces to be machined in the groove is less than or equal to 3 mm, whereby a sufficiently large magnetic field strength is ensured on the surfaces to be machined, which Prerequisite for the abrasive work of the abrasive powder represents.
  • the respective workpiece is guided past the machining body with the aid of the correspondingly movable workpiece holders.
  • the guiding of the workpiece preferably takes place in such a way that the local orientation of the helically coiled flute of a twist drill at the location of machining at least approximately coincide with the respectively effective tangent of the processing body. This allows a machining of a flute, in which the cutting edges are not affected and which allows the deepest immersion of the machining body in the flute.
  • a workpiece, such as a twist drill has a plurality of grooves, these grooves can be processed individually one after another or it can be provided a plurality of processing body, which are simultaneously with different grooves under engagement.
  • a machining device is advantageous in which the workpiece holder has a feed drive and a rotary drive with which the workpiece is to be advanced and rotated simultaneously, wherein the feed drive and the rotary drive are connected to a controller , which is formed such that the workpiece feed and the workpiece rotation are coordinated with each other.
  • the twist drill is first aligned by means of the positioning means of the workpiece holder so that the tangent of the processing body runs parallel to the longitudinal axis of the chip flute to be machined at the respective processing point.
  • the feed drive then makes it possible to move the workpiece, for example the twist drill, along the workpiece's longitudinal axis.
  • this linear feed movement must be superimposed by a rotational movement of the workpiece, which is coordinated with the feed motion so that the resulting total movement corresponds to the pitch of the flute
  • the relative movement between the machining body and workpiece thus results from the rotational movement of the machining body and the movement of the workpiece predetermined by the feed drive or the rotary drive or both.
  • the feed drive causes a linear movement of the workpiece
  • the rotary drive causes a rotational movement of the workpiece. In the case of such grooves, which run parallel to a longitudinal axis of a workpiece, only a linear feed movement is required.
  • the workpiece holder For the machining of other workpieces, which have a circumferential, self-contained groove on a lateral surface, wherein the groove extends in a direction perpendicular to an axis of symmetry of the workpiece plane, the workpiece holder must perform only one caused by the rotary drive rotational movement to the groove of Workpiece over the entire circumference of the workpiece to edit.
  • workpieces are crankshafts whose bearings are to be polished between the crank webs, the machining body dives in this case between the crank webs until the machining distance to the bearing surface is 3 mm or less.
  • the crankshaft then performs a rotational movement about its longitudinal axis.
  • the axis of rotation of the processing body is preferably aligned parallel to the axis of rotation of the crankshaft.
  • workpieces with a helically wound groove such as twist drills, require a synchronized movement both in the feed direction (linear movement) and in the direction of rotation (rotational movement).
  • a circular disk shape As a particularly advantageous shapes for the machining body, on the one hand a circular disk shape have been found, wherein magnets are arranged on the circumference of the circular disk. Particularly advantageous for the work of relatively small grooves is also the execution of the magnetic head as a truncated cone, wherein a peripheral edge is rounded at the cone base and is equipped with the magnets.
  • FIG. 1 shows a rotationally symmetrical machining body 14 with a peripheral frustoconical edge 13 of an otherwise not shown Processing apparatus.
  • the processing body 14, also called magnetic head, has on its edge a plurality of magnets, not shown.
  • the frustoconical edge 13 of the processing body 14 is rounded, so that it approximately copies the shape of the flute 12 of the spiral drill 11 to be processed.
  • magnetabrasives abrasive powder.
  • the workpiece shown in Figure 1 is a twist drill 11, the flute 12 is to be processed.
  • the workpiece 11 (the twist drill) is attached to a workpiece holder, which is to be aligned with the help of not shown in this figure positioning means relative to the rotational axis 15 of the processing body 14 and the other is connected to a feed drive and a rotary drive, the one Allow feed movement in the longitudinal direction of the workpiece and allow a rotational movement about an axis of rotation of the workpiece.
  • the workpiece 11 is aligned so that a tangent on the frustum-shaped edge 13 and the axis of rotation of the drill bit 11 to be machined form an angle such that this edge passes through the flute 12 without collision at the location of the machining.
  • This angle corresponds to the so-called slope of the twist drill and must be set for each drill type.
  • the distances to be set between the edge immersed in the flute and the surface of the flute should preferably be between 1 and 2 mm.
  • the processing body 14 is then placed in a rotational movement about the rotation axis 15.
  • This rotational movement has the largest share of the relative movement required for machining the flute between the twist drill 11 and the abrasive machining powder.
  • the machining powder (not shown in FIG. 1) is held on the outside of the edge 13 of the machining body 14 by the magnets of the machining body and taken along during its rotation. It performs an abrasive work in the flute, which has the reduction of the roughness of the same goal.
  • the workpiece holder In order to be able to machine the flute 22 over its entire length, the workpiece holder, not shown in this figure, performs both a feed movement along the axis of rotation of the workpiece during machining and a rotational movement about this axis of rotation.
  • This linear feed movement and the rotational movement are synchronized with each other so that the edge 13 of the processing body 14 with its tangent always runs approximately centrally in the flute 12. That is, the feed movement and the rotational movement of the workpiece are synchronized or coordinated, as it corresponds to the slope of the flute 12.
  • Fig. 3 shows the realization of the method according to the invention in the polishing of the spiral flute of a tool by means of controlled translational and rotary axes.
  • the rotary magnetic head 33 is driven by a three-phase motor 31.
  • This structure is mounted on a turntable 39, by means of which the angle between the adjacent to the circumference of the magnetic head 33 tangent and axis of rotation of the tool 35 can be adjusted.
  • the tool to be processed 35 is mounted in a receptacle and is driven by a servo motor 32 which is controlled by a PLC.
  • This structure is located on two 90 degree staggered guides, which allow by means of the dials 38 and 37, a manual positioning of the tool to make such that the tip of the flute of the tool is in engagement with the peripheral edge of the magnetic head 33 is said manual guides are with a parallel to Tool axis aligned guide 34 connected.
  • the guide 34 is driven by a servomotor, not shown. The latter is controlled by the PLC in such a way that its translatory movement takes place synchronously with the rotation of the tool 35.
  • Both the servomotor 35 responsible for the tool rotation and the servomotor responsible for the advancing movement of the tool receive the control pulses from the same PLC, thus making common Starting time and synchrony of the movements are guaranteed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP06004051A 2005-03-01 2006-02-28 Appareil et méthode pour usiner les surfaces creux de pièces Withdrawn EP1698431A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005010286A DE102005010286A1 (de) 2005-03-01 2005-03-01 Bearbeitungsvorrichtung und -verfahren zum Bearbeiten von Oberflächen in Vertiefungen von Werkstücken

Publications (1)

Publication Number Publication Date
EP1698431A1 true EP1698431A1 (fr) 2006-09-06

Family

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Family Applications (1)

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EP06004051A Withdrawn EP1698431A1 (fr) 2005-03-01 2006-02-28 Appareil et méthode pour usiner les surfaces creux de pièces

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Country Link
US (1) US20060211337A1 (fr)
EP (1) EP1698431A1 (fr)
DE (1) DE102005010286A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013130379A1 (fr) * 2012-02-28 2013-09-06 University Of Florida Research Foundation, Inc. Système et procédé de traitement de surface abrasif magnétique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155369A (en) * 1984-03-09 1985-09-25 Inst Sverkhtverdykh Material O Device for magnetoabrasive machining of workpieces
US5241792A (en) * 1991-02-08 1993-09-07 Yamaha Hatsudoki Kabushiki Kaisha Method and apparatus for surface finishing
WO2002038334A1 (fr) 2000-11-08 2002-05-16 Kmm Oberflächentechnik Gmbh Procede et dispositif de traitement de surface d'objets
US20020168922A1 (en) * 1998-05-21 2002-11-14 Mortell Paul D. Automated drill bit re-sharpening and verification system

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1931684A (en) * 1932-01-18 1933-10-24 Eastern Cutter Salvage Corp Method of grinding cutters
US2735231A (en) * 1953-05-22 1956-02-21 Reflectone Corp simjian
US3610075A (en) * 1968-07-01 1971-10-05 Illinois Tool Works Method of producing a plurality of cutting tools from a single fluted bar
SU878525A2 (ru) * 1977-02-10 1981-11-07 Предприятие П/Я А-1001 Устройство дл магнитно-абразивной обработки листового материала
US4186529A (en) * 1977-06-28 1980-02-05 S. E. Huffman Corporation Programmably controlled method for grinding end cutting tools and the like
SU1071411A1 (ru) * 1977-07-26 1984-02-07 Физико-технический институт АН БССР Устройство дл объемной полировки
US4175930A (en) * 1978-04-27 1979-11-27 Baubel Alexandr A Method for finishing surfaces of non-magnetic articles by means of ferromagnetic abrasive powder in magnetic field
US4186528A (en) * 1978-05-23 1980-02-05 Kosobutsky Alexandr A Machine for treating spherical surfaces of parts with magneto-abrasive powder
US4204370A (en) * 1978-05-30 1980-05-27 Deresh Ilya A Apparatus for working sheet materials with ferromagnetic powder
US4306386A (en) * 1978-05-31 1981-12-22 Sakulevich Faddei J Method of finishing ferromagnetic articles by ferromagnetic abrasive powders in magnetic field
US4211041A (en) * 1978-06-16 1980-07-08 Kozhuro Lev M Rotor-type machine for abrasive machining of parts with ferromagnetic abrasive powders in magnetic field
DE3202362C2 (de) * 1982-01-26 1986-05-22 Fa. Gottlieb Gühring, 7470 Albstadt Vorrichtung zum Ausspitzen eines Wendelbohrers
BG33474A1 (en) * 1982-02-11 1986-12-15 Glbov Inductor for magnetic abrasive polishing
US4546575A (en) * 1982-05-04 1985-10-15 The Boeing Company Method for precision grinding of end mounted objects
US4599826A (en) * 1984-03-05 1986-07-15 Institut Sverkhtverdykh Materialov Akademii Naukukrainskoi Ssr Device for magnetoabrasive machining of workpieces
DE3624472A1 (de) * 1986-07-19 1988-01-28 Schaudt Maschinenbau Gmbh Verfahren und maschine zum schleifen von innengewinde
EP0347462A4 (en) * 1987-11-18 1990-10-10 Fiziko-Tekhnichesky Institut Akademii Nauk Belorusskoi Ssr Device for magneto-abrasive machining of external cylindrical surfaces of parts
JPH0777704B2 (ja) * 1989-12-04 1995-08-23 松下電器産業株式会社 微小研磨方法
US5569061A (en) * 1995-04-12 1996-10-29 Kremen; Genady Method and device for magneto-abrasive machining of parts
US5775976A (en) * 1997-03-27 1998-07-07 Scientific Manufacturing Technologies, Inc. Method and device for magnetic-abrasive machining of parts
US5813901A (en) * 1997-03-27 1998-09-29 Scientific Manufacturing Technologies Inc Method and device for magnetic-abrasive machining of parts
US6036580A (en) * 1997-09-03 2000-03-14 Scientific Manufacturing Technologies, Inc. Method and device for magnetic-abrasive machining of parts
JP2003300110A (ja) * 2002-04-03 2003-10-21 Osg Corp ドリルおよびその製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155369A (en) * 1984-03-09 1985-09-25 Inst Sverkhtverdykh Material O Device for magnetoabrasive machining of workpieces
US5241792A (en) * 1991-02-08 1993-09-07 Yamaha Hatsudoki Kabushiki Kaisha Method and apparatus for surface finishing
US20020168922A1 (en) * 1998-05-21 2002-11-14 Mortell Paul D. Automated drill bit re-sharpening and verification system
WO2002038334A1 (fr) 2000-11-08 2002-05-16 Kmm Oberflächentechnik Gmbh Procede et dispositif de traitement de surface d'objets

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Publication number Publication date
US20060211337A1 (en) 2006-09-21
DE102005010286A1 (de) 2006-09-07

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