WO1990005044A1 - Usinage orbital et/ou planetaire a l'aide d'un milieu plastique visqueux - Google Patents

Usinage orbital et/ou planetaire a l'aide d'un milieu plastique visqueux Download PDF

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Publication number
WO1990005044A1
WO1990005044A1 PCT/US1989/004767 US8904767W WO9005044A1 WO 1990005044 A1 WO1990005044 A1 WO 1990005044A1 US 8904767 W US8904767 W US 8904767W WO 9005044 A1 WO9005044 A1 WO 9005044A1
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WO
WIPO (PCT)
Prior art keywords
workpiece
medium
displacer
visco
motion
Prior art date
Application number
PCT/US1989/004767
Other languages
English (en)
Inventor
Lawrence J. Rhoades
Original Assignee
Extrude Hone Corporation
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 Extrude Hone Corporation filed Critical Extrude Hone Corporation
Publication of WO1990005044A1 publication Critical patent/WO1990005044A1/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
    • B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency
    • B24B35/005—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency for making three-dimensional objects
    • 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
    • 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
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
    • B24B31/116—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work using plastically deformable grinding compound, moved relatively to the workpiece under the influence of pressure

Definitions

  • This invention relates generally to a new and improved method of honing, polishing, reducing, or otherwise abrading, workpiece surfaces, and more particularly relates to a unique new process for working the surfaces of a workpiece utilizing a visco-elastic abrasive medium in situ between the workpiece and a displacer.
  • One or more forms of relative motion between the workpiece and displacer then forces flow of the medium across the workpiece surface to be worked thereby effecting the abrasion as desired.
  • Abrasive flow machining is a well known nontraditional machining process whereby a visco-elastic medium, permeated with an abrasive grit, is extruded through or past a workpiece surface to effect an abrasive working of that surface.
  • the abrasive action in abrasive flow machining can be thought of as analogous to a filing, grinding, lapping or honing operation where the extruded visco-elastic abrasive medium passes through or past the workpiece as a "plug.”
  • the plug then becomes a self forming file, grinding stone or lap as it is extruded under pressure through the confined passageway restricting its flow, thereby working the selected surfaces of the workpiece.
  • abrasive flow machining is somewhat similar to other abrasion techniques wherein fluids are used as a medium to carry an abrasive grit in suspension for similar abrasion treatments, such as hydrodynamic machining, there are considerable differences.
  • fluids i.e. liquids or gases
  • very high velocities must be used in order to effect any abrasive action, because high speed impingement of the grit particles against the surface to be abraded is the essential force in such processes.
  • the visco-elastic abrasive medium is a semi-solid plastic, forced through the restrictive passageway under considerable pressure but with a relatively low velocity.
  • the semi-solid plastic medium must not only maintain the abrasive particles in a uniform suspension, but it must further provide a relatively firm backing for the abrasive grit to hold the grit firml against the passageway surfaces while the semi- solid, visco-elastic medium and grit are extruded therethrough. Hence, rather than impinging at high speeds on the surface to be abraded, the grit is slowly and actively worked against the surface to be abraded.
  • the prior art apparatus utilized in abrasive flow machining consists of a frame member holding two directly opposed media chambers with the workpiece insertable therebetween.
  • the media chambers are plastic extruding, positive displacement, expandable chambers which can hydraulically or mechanically extrude abrading media therefrom through the passageway of the workpiece and then into the other media chamber.
  • a removable workpiece fixture, designed to hold the workpiece, is secured between the two media chambers.
  • the workpiece fixture must be designed to securely hold the workpiece such that the workpiece surface to be worked is exposed within the passageway between the two media chambers.
  • the fixture must serve to merely seal each end of the bore to a media chamber so that the bore itself becomes a sealed passageway between one media chamber to the other.
  • the fixture is usually more complex and must be designed so that the workpiece and fixture together define the essential restricted passageway so that the surface to be abraded forms a portion of the passageway, and the medium will abrade that surface as it is extruded through the passageway.
  • the extruding medium consisting of a semisolid, difficulty flowable, visco-elastic material permeated with a abrasive grit, is contained in one of the media chambers, while the other chamber is empty.
  • the medium is then extruded, hydraulically or mechanically, from the filled chamber to the empty chamber via the restricted passageway through or past the workpiece surface to be abraded, thereby working the surface as desired.
  • the extruding medium is then extruded back and forth between the chambers to the extent necessary to effect the degree of abrasion desired.
  • Counterbores, recessed areas and even blind cavities can be abraded by using restrictors or mandrils to direct the medium flow along the surfaces to be abraded.
  • a medium displacement chamber is formed between the workpiece surface to be machined and a displacer, which may be similar to a mandril or restrictor as utilized in the prior art.
  • the displacer member is shaped to have surfaces in a facing spaced relationship to the surfaces of said workpiece to be abraded to thereby form a media chamber between the surfaces of said workpiece to be machined and said displacer member.
  • the chamber is filled with a mass of the medium and is preferable sealed therein. Then the displacer and/or workpiece are put into relative motion so that the medium is forced to move about within the medium chamber, i.e. extruded from one area of the chamber to another, and its motion against the surface of the workpiece will machine or otherwise abrade the workpiece as it moves therepast.
  • the visco- elastic abrasive medium is ideally a rheopectic material having the consistency of putty at room temperature with no pressure applied.
  • rheopectic defines the property of a composition in which the viscosity increases with time under shear or a suddenly applied stress. Stated another way, this property of the abrasive media is exactly the opposite of "thixotropy".
  • a typical example of such a material is silicone bouncing putty
  • the visco-elastic abrasive medium is displaced positively against and across a portion of a workpiece which is utilized as the displacement chamber or as the displacer, or as both.
  • the abrasive medium acts as a positively displaced abrading tool.
  • Another object of this invention to provide a new and inexpensive process for honing, polishing, reducing or otherwise abrading a workpiece surface utilizing a visco- elastic abrading medium which does not involve the direct extrusion of the medium.
  • Still another object of this invention to provide a new and inexpensive process for honing, polishing, reducing or otherwise abrading a workpiece surface which is ideally suited to the working of large surface area not easily worked by conventional abrasive flow machining.
  • Figure 1 is a cross-sectional side view illustrating one embodiment of this invention which involves orbital or horizontal reciprocal relative motion or combinations thereof between the displacer and workpiece.
  • Figure 2 is a cross-sectional top view of the embodiment shown in Figure 1 shown with the section taken at line II-II, and depicts an embodiment utilizing orbital relative movement, with or without rotational movement.
  • Figure 3 is identical to Figure 2 except that it depicts an embodiment utilizing a lateral reciprocal motion in several planes of movement, again with or without rotational motion.
  • Figure 4 is cross-sectional top views of another application of this invention, in this case where the workpiece is a gear, and utilizing the embodiment shown in
  • Figures 1 and 2 incorporating both rotational and orbital relative movement between the workpiece and displacer.
  • Figure 5 is a cross-sectional top view illustrating another embodiment of this invention which involves only a triangular orbital relative movement between the displacer and workpiece.
  • Figure 6 is a cross-sectional side view illustrating another embodiment of this invention which involves a vertical relative reciprocal motion between the workpiece and displacer. As illustrated, the displacer is in the fully withdrawn position.
  • Figure 7 is identical to Figure 6 except that it illustrates the displacer in the fully inserted position.
  • Figure 8 is a cross-sectional side view illustrating another embodiment of this invention involving a vertical relative reciprocal motion as utilized effect a more even abrasion of the workpiece.
  • Figure 9 is a cross-sectional side view illustrating another embodiment of this invention involving a vertical relative reciprocal motion as utilized effect an uneven abrasion of the workpiece.
  • the term "relative" motion or movement between the opposed surfaces is used to indicate that either or both the workpiece and displacer may be in motion to accomplish positive displacement of the viscous abrasive medium. Further, this movement may be gyratory, orbital, reciprocatory, or any combination of thereof with or without the combination of rotary motion therewith, so long as the motion effects a positive displacement of the abrasive medium across the workpiece surface to be treated.
  • FIG. 1 and 2 will illustrate one embodiment of this invention in its simplest form utilizing only orbital relative motion, wherein workpiece 10 could be a die casting mold or the like having a mold cavity 12 therein to be abraded.
  • a displacer 14, having a profile smaller than cavity 12 is adapted to be insertable within cavity 12 to provide a medium chamber 16 formed between the entire surface of cavity 12 and displacer 14.
  • a visco-elastic abrasive medium 18 is deposited within medium chamber 16, and is sealed therein by sealing ring 20, securely attached around displacer 14, when displacer 14 is suitable inserted within cavity 12, as shown.
  • the circular arrows passing over displacer 14 represents the orbital path of the axis thereof.
  • the motion of the visco-elastic abrasive medium 18a is caused by the relative orbital motion between the workpiece 10 and displacer 14 which tends to push or extrude the medium 18 around the cavity 12 as it is squeezed from an area of the chamber of diminishing section into an area of expanding section.
  • the relative orbital motion can be combined with a relative rotational motion so that in essence, with respect to the workpiece 10, the displacer 14 revolves on its axis as it orbits within cavity 12.
  • the efficiency of the operation can be improved and wear of the displacer surface minimized if the surface of the displacer 14 is such that it resist flow of the visco-elastic abrasive medium 18 therepast.
  • This can readily be done by any of several ways.
  • fin-like protrusions can be incorporated on the surface of the displacer which will project into the body of medium so that the medium is more or less carried along with the motion of the displacer and the relative displacement between the displacer and the medium is reduced while enhancing the relative motion between the medium and the workpiece.
  • the medium will tend to adhere to porous or roughened surfaces as well as surfaces coated with polyurethane, silicon rubber or like materials.
  • the surface of the displacer 14 is made porous or roughened, or is coated with polyurethane or silicon rubber, the medium will tend to adhere thereto, so that when there is relative movement between such a displacer and a workpiece surface, the motion between the workpiece and medium is enhanced at the expense of motion between the displacer and the medium.
  • the embodiment depicted in Figure 3 is substantially like that depicted in Figure 2 described above, except that there is a relative lateral oscillatory motion between the displacer 12a and the workpiece 10a, here again with or without rotational motion.
  • the visco-elastic abrasive medium 18a is forced to flow back and forth within the chamber 16a by the relative lateral oscillatory motion, which can be in two or more planes as represented by the arrows imposed over the displacer 14a.
  • the form of relative movement between the displacer and the workpiece is not particularly critical, particularly where the surface of the workpiece is uniform and continuous as shown. Indeed, the orbital or reciprocal motions as depicted in these two embodiments will have comparable abrading effects on the workpiece.
  • the workpiece 20 may be a gear or the like having uniformly spaced gear- teeth 22 around the cylindrical periphery thereof.
  • the displacer 24 is an annular shaped form which is positioned to encircle workpiece 20, providing a chamber 26 therebetween. Displacer 24 is preferably provided with a plurality of protrusions 25 extending inwardly, and having a size and spacing as can be insertable between gear-teeth 22. When a visco-elastic abrasive medium 28 is sealed within chamber 26, a relative motion is imparted between workpiece 20 and displacer 24.
  • the relative motion between the workpiece 20 and displacer 24 is a combination of rotational and orbital motion so that the gear-teeth 22 will come close to meshing with protrusions 25 as workpiece 20 rotates and orbits, i.e. "rolls" along the inner surface of displacer 24, but leaving a small gap so that the two components do not in fact come into contact.
  • the medium 28 will not only be forced to revolve about chamber 26 in a manner similar to that described above, but the near meshing of gear-teeth 22 into protrusions 25 will cause the medium to flow into and out of the spaces between the gear teeth 22 so that it will flow along the surface of gear-teeth 22 to abrade the surface thereof as desired.
  • displacer 24 While a smooth surface on displacer 24 could be provided, it should be readily apparent that medium 28 would not be squeezed from the recesses between gear-teeth 22, so that the abrasion would be concentrated on the outer periphery of gear teeth 22, with little abrasion on the inner surfaces thereof.
  • a three dimensional machining action is exemplified.
  • the workpiece 30 has a triangular opening therethrough to be machined.
  • a mating but substantially smaller triangular-sided displacer 32 is positioned within the triangular opening in workpiece 30, having sufficiently smaller dimensions so that there is sufficient space between the triangular opening and the displacer 32 to form a medium chamber 34 therearound.
  • the workpiece 30 and/or the displacer 32 are mounted to a suitable means (not shown) as will impart a relative triangular translational motion between the workpiece 30 and displacer 32 as depicted by the arrow over displacer 32 so that the corners of the displacer 32 will move into the corners of the workpiece 30.
  • a visco-elastic abrasive medium is deposited within the medium chamber 34 and sealed therein before the triangular orbital motion is started.
  • the medium is forced to flow within the three-sided medium chamber as it is squeezed and extruded from from between two opposing surfaces which are coming together and into the space between two opposing surfaces that are moving apart.
  • an elastic sleeve member 46 such as a length of heavy rubber pipe, is is secured around the upper periphery of workpiece 40 and the lower periphery of displacer 42, and there held by clamps 48.
  • the arrangement is set up in its starting position with the displacer 42 in it fully upward position with the visco-elastic abrasive medium disposed within the media chamber 44 such that the sides of media chamber are closed by the resilient sleeve member 46.
  • the displacer 42 commences its downward relative motion into the cavity of workpiece 40, the visco-elastic abrasive medium is squeezed or extruded from the cavity or media chamber 44 moving upward between the vertical surfaces of workpiece 40 and displacer 42 thereby abrading the vertical surfaces of workpiece 40.
  • Such an uneven abrasive action can be utilized to an advantage in some applications, such as the finishing of mold cavities and other workpieces, where some degree of taper is essential.
  • This characteristic can be either minimized or enhanced by the proper design of the displacer to workpiece interface.
  • Figure 9 represents a displacer design as will minimize uneven abrasion
  • Figure 10 illustrates a design as utilized to maximize uneven abrasion to the extent of radiusing the upper corner of the cavity in the workpiece.
  • displacer 52 is provided with heavy collar or flange portion 54 around the lower extremity thereof.
  • Figure 10 illustrates a reverse situation where the displacer 62 is designed to maximize abrasion at the upper edge of the cavity surface in workpiece 60 to effect a radiusing thereof. Because the entire side surface of displacer 62 is angled with respect to the side surface of the cavity within workpiece 60, the abrasive action of the visco- elastic abrasive medium will be concentrated at that area where its passage is most restricted, in this case the upper edge of the cavity.
  • the solid line is representative of the starting surface of the cavity side wall, while the dotted line is representative of the form of the finished cavity side wall.
  • differing forms of motion in combination with vertical reciprocal motion could be utilized to effect differing abrasion requirements.
  • the angle of the vertical reciprocal motion can be varied so that it moves downward at an angle into the workpiece to be abraded, or the angle can be slowly rotated so that displacer moves downward into the workpiece at a constantly changing angle. Accordingly, the variations seem almost countless, and are limited only by ones imagination to formulate new variations of motion and displacer design to satisfy a great variety of abrading requirements.
  • Typical parameter ranges for the embodiments illustrated would include grit sizes of 6 microns to 16 mesh, gap distance of 0.005-1.5 centimeters (0.002-0.500 inches), time treatments of 5-60 minutes, revolutions, orbits or vibrations of 20 to
  • the displacer of Figure 6 could be operated at 500 vibrations per minute with an amplitude of 0.13 centimeters (0.05 inches) for 5 minutes and a gap of 0.013 centimeters (0.005 inches) would be sufficient of a grit size of 10 microns. It is preferable that the plastic carrier matrix have a sufficient body at moderate pressure and low velocity to press the abrasive particles against the work surface with sufficient force to produce the results desired.
  • MV70 Extrude-Hone media comprising 50% by volume of silicon carbide abrasive grit and 50% by volume of silicon bouncing putty (borosiloxane) carrier (matrix) having a ratio of approximately 2:1 by weight.
  • silicone bouncing putty exhibits many of the characteristics of a fluid. Under pressure it becomes less flowable and more like a solid. It conforms exactly to the shape of whatever confines it and this helps in abrading intricate shapes and details. It should be noted that silicone bouncing putty (borosiloxane) is particularly useful in the invention as it is well known that this material becomes harder when subjected to sudden shear force such as when squeezed in the gap between the opposed surfaces as they are moved relative to one another. This increased stiffness enhances abrasion of the workpiece by holding the abrasive particles more firmly in place and transferring the driving force of the working member to the abrasive grains at the work surface.
  • a non-rheopectic abrasive medium suitable for use in some situations is that described in U.S. Patent No. 3,819,343 - Rhoades.
  • This invention may be utilized to hone or abrade machined parts, die castings, forgings, sand castings, investment castings and extruded shapes. It is applicable to all materials such as steel, aluminum, brass, bronze, plastics, glass and other compositions and materials as needed.
  • the abrasive used in the carrier matrix will be varied to suit the job.
  • a satisfactory abrasive to use in working on steel is boron carbide (BC) which is readily obtained from the Norton Company in standard grit sizes.
  • Another abrasive which is useful for many applications is aluminum oxide.
  • Other abrasives might include diamond dust silicon carbide, rouge, corrundum,garnet, aluminum, glass or, in some unusual operations, softer material such as fiber or shell material.
  • the abrasive will vary from about 2 to 4 grams of abrasive particles per gram of the matrix material.
  • the above-mentioned visco-elastic honing media act as a surface abrading tool and are unique for the reason that the abrasive grit is held or contained in a random repositioning arrangement in a plastic matrix.
  • the grain particles in use in the process of this invention are sharp until the sum of all points or edges have been exposed many times, as opposed to the traditional concept of an abrasive "stone" or lap wherein the grain particle is fixed and presents one cutting point or edge which is maintained until dulling causes removal by means of a dressing operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

L'invention concerne un procédé d'affilage, de polissage, de réduction ou d'autre forme d'abrasion de surfaces de pièces à usiner à l'aide d'un milieu abrasif (18) visco-élastique in situ, entre la pièce à usiner (10) et un élément de déplacement (14), ledit élément de déplacement (14) présentant des surfaces en position espacée opposée par rapport aux surfaces de ladite pièce à usiner (10) à abraser; une chambre de milieu est ainsi formée entre les surfaces de ladite pièce (10) à usiner et ledit élément de déplacement (14). Le milieu (18) abrasif visco-élastique est déposé dans ladite chambre de milieu. Ensuite, une ou plusieurs formes de mouvement relatif entre la pièce à usiner (10) et l'élément de déplacement (14) force le milieu (18) à s'écouler sur la surface de ladite pièce à usiner à abraser exécutant ainsi l'abrasion comme désiré.
PCT/US1989/004767 1988-11-02 1989-10-24 Usinage orbital et/ou planetaire a l'aide d'un milieu plastique visqueux WO1990005044A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US26595488A 1988-11-02 1988-11-02
US265,954 1988-11-02

Publications (1)

Publication Number Publication Date
WO1990005044A1 true WO1990005044A1 (fr) 1990-05-17

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PCT/US1989/004767 WO1990005044A1 (fr) 1988-11-02 1989-10-24 Usinage orbital et/ou planetaire a l'aide d'un milieu plastique visqueux

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EP (1) EP0441865A4 (fr)
JP (1) JP2852346B2 (fr)
AU (1) AU4528889A (fr)
CA (1) CA2001970C (fr)
WO (1) WO1990005044A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000032354A2 (fr) * 1998-11-27 2000-06-08 Mingot, Roberto Materiau, procede et appareil de polissage de pieces
GB2382045A (en) * 2001-11-01 2003-05-21 Alstom Method of machining curved contours
WO2004103640A1 (fr) * 2003-05-24 2004-12-02 Daimlerchrysler Ag Masse d'abrasion, procede d'abrasion et dispositif d'abrasion
EP3257627A1 (fr) * 2016-06-17 2017-12-20 United Technologies Corporation Procédé et article d'usinage par écoulement abrasif

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5227132B2 (ja) * 2008-10-01 2013-07-03 Ｈｏｙａ株式会社 磁気ディスク用ガラス基板の製造方法及び磁気ディスクの製造方法
CN113681440B (zh) * 2021-09-24 2022-11-08 义乌工商职业技术学院 加工圆柱工件的液动压抛光设备

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US3521412A (en) * 1968-04-12 1970-07-21 Extrude Hone Inc Method of honing by extruding
US3593410A (en) * 1967-11-21 1971-07-20 Robert A Taylor Method for casting and finishing tools or dies
US3708919A (en) * 1970-11-18 1973-01-09 Kramatorsky I Device for lapping tapered mating surfaces of parts
JPS543696A (en) * 1977-06-09 1979-01-11 Power Reactor & Nuclear Fuel Dev Corp Manufacture method of reactor fuel pellet
JPS599755A (ja) * 1982-07-07 1984-01-19 Nec Corp マイクロプログラム読出し制御方式

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CA1254134A (fr) * 1984-03-28 1989-05-16 Mount Sinai School Of Medicine Of The City University Of New York Methode de cytometrie de flux
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US3593410A (en) * 1967-11-21 1971-07-20 Robert A Taylor Method for casting and finishing tools or dies
US3521412A (en) * 1968-04-12 1970-07-21 Extrude Hone Inc Method of honing by extruding
US3521412B1 (fr) * 1968-04-12 1983-05-17
US3708919A (en) * 1970-11-18 1973-01-09 Kramatorsky I Device for lapping tapered mating surfaces of parts
JPS543696A (en) * 1977-06-09 1979-01-11 Power Reactor & Nuclear Fuel Dev Corp Manufacture method of reactor fuel pellet
JPS599755A (ja) * 1982-07-07 1984-01-19 Nec Corp マイクロプログラム読出し制御方式

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000032354A2 (fr) * 1998-11-27 2000-06-08 Mingot, Roberto Materiau, procede et appareil de polissage de pieces
WO2000032354A3 (fr) * 1998-11-27 2000-11-09 Mingot Roberto Materiau, procede et appareil de polissage de pieces
GB2382045A (en) * 2001-11-01 2003-05-21 Alstom Method of machining curved contours
GB2382045B (en) * 2001-11-01 2004-01-14 Alstom Method of machining curved contours
WO2004103640A1 (fr) * 2003-05-24 2004-12-02 Daimlerchrysler Ag Masse d'abrasion, procede d'abrasion et dispositif d'abrasion
EP3257627A1 (fr) * 2016-06-17 2017-12-20 United Technologies Corporation Procédé et article d'usinage par écoulement abrasif
US10646977B2 (en) 2016-06-17 2020-05-12 United Technologies Corporation Abrasive flow machining method
US11951586B2 (en) 2016-06-17 2024-04-09 Rtx Corporation Abrasive flow machining method and article

Also Published As

Publication number Publication date
EP0441865A1 (fr) 1991-08-21
JPH04503189A (ja) 1992-06-11
EP0441865A4 (en) 1992-05-13
CA2001970A1 (fr) 1990-05-02
CA2001970C (fr) 2000-11-14
AU4528889A (en) 1990-05-28
JP2852346B2 (ja) 1999-02-03

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