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EP1700670A2 - Machine-outil superabrasive et méthode de son utilisation - Google Patents

Machine-outil superabrasive et méthode de son utilisation Download PDF

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Publication number
EP1700670A2
EP1700670A2 EP06251319A EP06251319A EP1700670A2 EP 1700670 A2 EP1700670 A2 EP 1700670A2 EP 06251319 A EP06251319 A EP 06251319A EP 06251319 A EP06251319 A EP 06251319A EP 1700670 A2 EP1700670 A2 EP 1700670A2
Authority
EP
European Patent Office
Prior art keywords
grinding
workpiece
velocity
super
cooling
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Withdrawn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
EP06251319A
Other languages
German (de)
English (en)
Other versions
EP1700670A3 (fr
Inventor
Brian J. Schwartz
Daniel F. Grady
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.)
RTX Corp
Original Assignee
United Technologies Corp
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 United Technologies Corp filed Critical United Technologies Corp
Publication of EP1700670A2 publication Critical patent/EP1700670A2/fr
Publication of EP1700670A3 publication Critical patent/EP1700670A3/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • 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
    • B24B51/00—Arrangements for automatic control of a series of individual steps in grinding a workpiece
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant

Definitions

  • the present invention relates to a super-abrasive machining tool and its methods of use.
  • a very common method of removing large volumes of material with either simple or complex shapes at the radius is turning.
  • the material removal rate for materials such as aluminum and steel has been successfully cut for many years with conventional turning.
  • Turning processes generally employs a lathe or a similar revolving mount to hold and revolve a workpiece while a stationary tool is applied to the surface of the revolving workpiece to remove material.
  • This process works well with cylindrical shaped parts that are smooth at the outer radius and are not interrupted by geometric features at the outer surface of the part.
  • This method is effective for many materials with varying hardnesses including superalloys, nickel alloys, titanium and ceramics. With these harder materials, however, tool wear and the material removal rates are limited based on the hardness of the material.
  • the turning processes can wear tools relatively quickly, that is within minutes, when machining high hardness materials such as nickel and titanium superalloys. As a result, the turning process becomes very costly and inefficient due to the set up time consumed when replacing tools.
  • a super-abrasive machining tool mounted in a machining center comprises a computer operated multi-axis grinding apparatus, the tool comprises means for grinding a workpiece comprising an exterior surface including a super abrasive material coating, wherein the means for grinding revolves at a first velocity in a first direction; means for cooling the means for grinding; and means for revolving a workpiece comprising a mount, wherein the means for revolving revolves in a second direction at a second velocity less than the first velocity.
  • a method for super-abrasively grinding a workpiece comprises disposing a workpiece in a super-abrasive machining tool, wherein the super-abrasive grinding machining tool comprises means for grinding and means for cooling the workpiece; rotating the workpiece in a first direction and at a first velocity; rotating the means for grinding in a second direction and at a second velocity greater than the first velocity; grinding the workpiece using the means for grinding; and cooling the workpiece being ground.
  • the present invention relates to a super-abrasive machining tool and methods of its use.
  • the super-abrasive machining tool utilizes both a means for grinding a workpiece and a means for revolving the workpiece in order to efficiently and cost effectively remove material from a workpiece comprising superalloy materials or even ceramic material.
  • the workpiece is mounted in the tool and revolves, for example, in a clockwise direction, while the means for grinding revolves in the same or opposite direction and makes contact with the revolving workpiece.
  • the means for grinding revolves at a much greater speed than the revolving workpiece which facilitates the removal of material from the workpiece.
  • the workpiece may be ground to remove material in order to reduce its diameter or size, to machine features into its surface and/or to impart non-continuous features into its surface.
  • the workpiece comprises a substantially circular shape, for example, circular, oval, oblong, and the like, the workpiece may comprise other geometric and non-geometric shapes having smooth exterior surfaces or one or more non-continuous or continuous features on the surface of the workpiece.
  • the super-abrasive machining tool may be mounted in a machining center comprising any suitable computer operated multi-axis grinding or milling machine known in the art.
  • the super-abrasive machining tool may be moved by the pre-programmed, computer operated machine center to provide the desired shape of the workpiece and/or the desired features on the surface of the workpiece.
  • a super-abrasive machining tool 10 may be mounted in a machining center comprising a base and at least two members for supporting a means for grinding 12 and a means for revolving 14.
  • Means for revolving 14 may include an axis 40 and a mount 16 upon which a workpiece 18 is preferably disposed.
  • Means for revolving 14 may revolve in a clockwise or counter-clockwise direction 36.
  • Means for grinding 12 may also revolve in clockwise or counter-clockwise direction 38, and may revolve in the same direction or in the opposite direction as direction 36 of means for revolving 14.
  • a means for cooling 24 may also be disposed proximate to means for grinding 12 and workpiece 18.
  • Means for cooling 24 may dispense a cooling fluid including but not limited to water, oil, and the like, prior to and during the application of the means for grinding 12.
  • Means for grinding 12 may comprise any grinding tool comprising an exterior surface having a super-abrasive coating, that is, a grit material 26 applied to a majority of its surface area, preferably about 70 to 75% of its surface area.
  • grit material 26 is formed from a super-abrasive material selected from the group consisting of plated cubic boron nitride, vitrified cubic boron nitride, diamond, synthetic diamond, combinations comprising the foregoing super-abrasive materials, and the like.
  • the super-abrasive material 26 that coats the means for grinding may have a grit size in the range of 40/45 to 325/400 depending on the depth of the cut and the hard surface finish.
  • Grit material 26 may be applied to the surface area using any suitable technique known in the art including but not limited to electroplating, vitrified process, combinations comprising the foregoing methods and the like.
  • means for grinding 12 may comprise any grinding tool comprising an exterior surface having a super-abrasive coating.
  • means for grinding 12 comprises a grinding wheel, a quill or a small wheel as known to one skilled in the art, and the like as represented in FIGS. 1 and 2.
  • Means for grinding 12 may grind workpiece 18 at a point of contact 20 of workpiece 18 such as along its circumference in order to remove material and reduce the diameter, and ultimately the size, of workpiece 18 as represented in FIG 1.
  • means for grinding 12 may also be oriented such that its longitudinal axis 30 is at an angle ⁇ with respect to the surface of the workpiece 18 in order to impart a feature as represented in FIG. 2.
  • longitudinal axis 30 of means for grinding 12 may be aligned at an angle with respect to the axis 32 of workpiece 18 such that the point of contact 20 may be along the exterior surface, rather than circumferential surface, of workpiece 18.
  • means for grinding may comprise a grinding tool having one or more non-continuous features on its exterior surface.
  • means for grinding 12 may be a wheel having a super-abrasive coating disposed upon a contoured exterior surface 42 as shown in FIG. 3.
  • Such contoured exterior surface 42 having grit material 26 may be utilized to produce interrupted non-continuous features 44 in workpiece 46, remove material from existing non-continuous features of workpiece 46, impart non-continuous features or other features to the surface of workpiece 46, combinations of such applications, and the like.
  • Such non-continuous features 44 may comprise any features such as grooves, channels, and the like, and/or shapes such as squares, rectangles, u-shapes, and the like, to form, for example, teeth as illustrated in FIG. 3.
  • the workpiece may be kept stationary during grinding (i.e. its velocity is zero).
  • a method for super-abrasively machining a workpiece broadly comprises the steps of providing the super-abrasive machining tool and orienting the tool relative to a surface of a workpiece so that there is at least one point of contact between the workpiece surface and the super-abrasive coating or grinding surface of the means for grinding.
  • the workpiece is rotated by the machining tool at a first velocity in a first direction, preferably in the range of about 200 to 20,000 surface feet per minute ("sfm") in a clockwise or counter-clockwise direction.
  • the means for grinding is also rotated by the machining tool at a second velocity in a second direction, preferably in the range of about 500 to 120,000 surface feet per minute (sfm) in a direction opposite that of the direction of the workpiece.
  • the ratio of the velocity of the means for revolving the workpiece to the means for grinding may be 500 sfm to 10,000 sfm.
  • the methods of use of the super-abrasive machining tool described herein remove material at a higher efficiency and shorter period of time than prior methods, such as turning, by grinding the workpiece at a greater velocity in a direction opposite its own movement. While applying any of the methods and grinding tools contemplated herein, any suitable coolant and/or lubricant may be applied to the means for grinding and the surface of the workpiece while the material is being removed.
  • the super-abrasive machining tool and method described herein allows material to be removed at much greater speeds and lower loads which avoid causing damage to the workpieces being machined.
  • the super-abrasive machining tool also allows heat to be dissipated very quickly, which helps avoid the formation of bent grains or white layers in the microstructure of the workpiece and provides better surface finishes.
  • the super-abrasive machining tool has an increased tool life of potentially hundreds of hours compared to an amount of minutes for tools used in turning processes.
  • the super-abrasive machining tool of the present invention is also faster at removing material than present turning processes and thus economically beneficial.
  • Yet another advantage of the super-abrasive machining tool and methods described herein is its application to superalloys, nickel alloys, and titanium alloys, as well as its potential application to ceramic materials, due to the hardness of these materials and the expense and time required to machine such superalloys with conventional turning processes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP06251319A 2005-03-11 2006-03-13 Machine-outil superabrasive et methode de son utilisation Withdrawn EP1700670A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/077,676 US20060205321A1 (en) 2005-03-11 2005-03-11 Super-abrasive machining tool and method of use

Publications (2)

Publication Number Publication Date
EP1700670A2 true EP1700670A2 (fr) 2006-09-13
EP1700670A3 EP1700670A3 (fr) 2006-10-18

Family

ID=36499088

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06251319A Withdrawn EP1700670A3 (fr) 2005-03-11 2006-03-13 Machine-outil superabrasive et methode de son utilisation

Country Status (5)

Country Link
US (1) US20060205321A1 (fr)
EP (1) EP1700670A3 (fr)
JP (1) JP2006247835A (fr)
KR (1) KR100781026B1 (fr)
CN (1) CN1830624A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008106676A1 (fr) * 2007-03-01 2008-09-04 Mori Seiki Usa, Inc. Machine-outil à buse de refroidissement et procédé d'application d'un liquide réfrigérant
US10335916B2 (en) 2013-07-08 2019-07-02 Saint-Gobain Abrasives, Inc. Method for forming a workpiece

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090275862A1 (en) * 2008-04-30 2009-11-05 Cook Incorporated Guidewire and method of making same
TWI453089B (zh) * 2010-08-16 2014-09-21 Saint Gobain Abrasives Inc 對包含超級磨料材料的工件進行磨削之方法
CN104723186B (zh) * 2013-12-20 2017-03-15 宁波江丰电子材料股份有限公司 钨硅合金的机械加工方法
CN107717636A (zh) * 2017-09-12 2018-02-23 潘汉祥 一种新型金属高速抛光方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4653235A (en) * 1985-11-20 1987-03-31 Ex-Cell-O Corporation Superabrasive grinding with variable spark-out and wheel dressing intervals
EP1500453A1 (fr) * 2003-07-24 2005-01-26 United Technologies Corporation Production des rainures

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US4953522A (en) * 1987-11-27 1990-09-04 Schaudt Maschinenbau Gmbh Method of dressing grinding wheels in grinding machines
FR2681546B1 (fr) * 1991-09-20 1995-12-08 Essilor Int Procede et machine d'usinage a commande numerique multi-axe.
US5167674A (en) 1992-04-13 1992-12-01 Norton Company Bismaleimide-triazine resin bonded superabrasive wheels
JPH06246612A (ja) * 1993-02-24 1994-09-06 Hirotaka Kawamura 舶用弁と弁座の研磨装置
KR970010915B1 (ko) * 1993-04-14 1997-07-02 박 경 판유리 변형 면취기의 부분 면취장치
JPH0947947A (ja) * 1994-08-30 1997-02-18 Seiko Seiki Co Ltd 研削装置、並びに研削方法、並びに半導体装置及び半導体基板の製造方法
US6110009A (en) * 1995-11-16 2000-08-29 Akebono Brake Industry Co., Ltd. Grinding machine for grinding frictional surface of pad and method of grinding the pad
GB9615511D0 (en) * 1996-07-24 1996-09-04 Western Atlas Uk Ltd Improvements relating to grinding methods and apparatus
JPH10328986A (ja) * 1997-03-27 1998-12-15 Ngk Insulators Ltd ディスク基板中間体とその製造方法及び研削加工装置
DE19901338C1 (de) * 1999-01-15 2000-03-02 Reishauer Ag Verfahren zum Profilieren von schnelldrehenden Schleifschnecken sowie Vorrichtung zur Durchführung des Verfahrens
GB2361445A (en) * 1999-02-03 2001-10-24 Unova Uk Ltd Angle head grinding
BE1012482A3 (nl) * 1999-02-24 2000-11-07 Zf Getriebe N V Sint Truiden Transmissie-eenheid voor motorvoertuigen, riemschijf hierbij aangewend en werkwijze voor het vervaardigen van zulke riemschijf.
JP3649037B2 (ja) * 1999-04-14 2005-05-18 豊田工機株式会社 複合研削盤
US6240942B1 (en) * 1999-05-13 2001-06-05 Micron Technology, Inc. Method for conserving a resource by flow interruption
WO2001030537A1 (fr) * 1999-10-27 2001-05-03 Unova U.K. Limited Machine a meuler dotee de deux roues de meulage
JP2003300158A (ja) * 2002-04-08 2003-10-21 Hoya Corp レンズ加工装置
JP2004114195A (ja) 2002-09-25 2004-04-15 Toyoda Mach Works Ltd 研削方法及び円筒研削盤
JP2005153135A (ja) 2003-10-28 2005-06-16 Allied Material Corp 鉄鋼材料の研削切断加工法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4653235A (en) * 1985-11-20 1987-03-31 Ex-Cell-O Corporation Superabrasive grinding with variable spark-out and wheel dressing intervals
EP1500453A1 (fr) * 2003-07-24 2005-01-26 United Technologies Corporation Production des rainures

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008106676A1 (fr) * 2007-03-01 2008-09-04 Mori Seiki Usa, Inc. Machine-outil à buse de refroidissement et procédé d'application d'un liquide réfrigérant
US8074543B2 (en) 2007-03-01 2011-12-13 Mori Seiki Usa, Inc. Machine tool with cooling nozzle and method for applying cooling fluid
DE112008000549B4 (de) * 2007-03-01 2019-08-14 Mori Seiki U.S.A., Inc. Numerisch gesteuerte Maschine und Verfahren zur Anwendung eines Kühlmittels
US10335916B2 (en) 2013-07-08 2019-07-02 Saint-Gobain Abrasives, Inc. Method for forming a workpiece

Also Published As

Publication number Publication date
KR100781026B1 (ko) 2007-11-29
CN1830624A (zh) 2006-09-13
EP1700670A3 (fr) 2006-10-18
JP2006247835A (ja) 2006-09-21
KR20060099458A (ko) 2006-09-19
US20060205321A1 (en) 2006-09-14

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