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WO2008032152A1 - Machine de taille de diamant rotative à grande vitesse - Google Patents

Machine de taille de diamant rotative à grande vitesse Download PDF

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Publication number
WO2008032152A1
WO2008032152A1 PCT/IB2007/002423 IB2007002423W WO2008032152A1 WO 2008032152 A1 WO2008032152 A1 WO 2008032152A1 IB 2007002423 W IB2007002423 W IB 2007002423W WO 2008032152 A1 WO2008032152 A1 WO 2008032152A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting machine
diamond cutting
rotor
shaft
rotary diamond
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.)
Ceased
Application number
PCT/IB2007/002423
Other languages
English (en)
Inventor
Carl Helmuth Deckert
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.)
WEGNER EMILE
Original Assignee
WEGNER EMILE
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 WEGNER EMILE filed Critical WEGNER EMILE
Publication of WO2008032152A1 publication Critical patent/WO2008032152A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/12—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/02—Driving main working members
    • B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
    • B23Q5/06—Driving main working members rotary shafts, e.g. working-spindles driven essentially by fluid pressure or pneumatic power
    • 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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B24B47/14—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by liquid or gas pressure
    • 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
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/16—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of diamonds; of jewels or the like; Diamond grinders' dops; Dop holders or tongs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
    • B28D5/02—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by rotary tools, e.g. drills
    • B28D5/022—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by rotary tools, e.g. drills by cutting with discs or wheels

Definitions

  • This invention relates to a high-speed rotary diamond cutting machine which term is intended to include both sawing machines used for dividing a rough diamond into two or more parts and polishing machines used for polishing facets on a stone during the composite cutting procedure.
  • Diamond sawing machines that are presently used for the purpose of dividing a rough diamond into two or more parts fall basically into two different categories, namely, the traditional rotary sawing machines, and state-of-the- art laser cutting machines.
  • the belt drive limits the speed at which the disc can be driven and this in turn results in the disc deviating on occasions from the required path with a consequent increase in loss of diamond.
  • rotational speeds that can be achieved utilising such a belt drive mechanism is about 7500 rpm.
  • the disc may jam thereby possibly resulting in a burning out of the drive motor with resultant downtime and maintenance being necessary.
  • the direction of rotation of disc is usually reversed in order to combat the relevant hard spot or change in crystalline structure.
  • a rotary diamond cutting machine comprising a base supporting a rotatable driven shaft by way of at least one bearing and wherein the shaft has a flange assembly for mounting a working disc thereto so as to be driven in unison with the shaft, the diamond cutting machine being characterised in that a rotor of a prime mover that is to impart rotary motive power to the driven shaft is arranged coaxially with the driven shaft and is coupled thereto either directly or by way of an in line coupling.
  • the rotor to be selected from a fluid driven turbine and windings of an induction or brushless electric motor; for the driven shaft to be generally horizontal in the operative orientation; for the diamond cutting machine to have a single central bearing in which instance the flange assembly for mounting a working disc thereto is positioned on one side thereof and the rotor on the other side thereof and wherein the rotor and may optionally be secured directly to the drive shaft; in the alternative for the rotor to be coupled to the driven shaft by way of a coupling, in particular a magnetic coupling in which instance the rotor has its own bearing; for the bearing supporting the driven shaft to be an air bearing; and, in the instance that the rotor is a turbine, for the turbine to be an air turbine adapted to be operated by means of compressed air and preferably being of the type in which an endless series of pockets is formed in an outer cylindrical surface of the turbine and into which a jet of compressed air can be directed, the turbine conveniently having the general nature of a Terry turbine.
  • the working disc for cutting purposes, will generally be a phosphor bronze disc of the type commonly used in the art.
  • the working disc could be a polishing disc presenting a cylindrical peripheral surface that can be used for polishing purposes.
  • the stone itself will be supported in a rotatable manner so that a flat face can be polished using a straight line of contact with the cylindrical surface.
  • the cylindrical surface provides an additional facility for polishing arcuate surfaces on a stone as well.
  • the same cutting machine can be used selectively for both purposes simply by exchanging the phosphor bronze cutting disc for a polishing wheel, and vice versa, as may be required.
  • the cutting machine may well be possible for the cutting machine to have a single direction of rotation in the event that jamming is substantially obviated by the use of such high speeds of rotation.
  • the rotor be provided with a facility for enabling it to be driven selectively in either angular direction and, in the event that the rotor is a turbine having an endless series of pockets, as indicated above, two oppositely directed juxtaposed series of pockets could be provided in a cylindrical surface thereof.
  • Figure 1 is a perspective view from one side of one embodiment of diamond cutting machine according to the invention with the turbine in exploded relationship relative thereto for illustrative purposes;
  • Figure 2 is a perspective view from the opposite side thereof;
  • Figure 3 is a front elevation thereof with the turbine housing and associated nozzles removed for illustrative purposes;
  • Figure 4 is an end elevation of the machine
  • FIG. 5 is an enlarged sectional elevation thereof
  • Figure 6 is a plan view thereof
  • Figure 7 is a view similar to Figure 3 illustrating a turbine that has two oppositely directed series of pockets to enable reversible rotation to be applied thereto;
  • Figure 8 is a sectional schematic elevation similar to Figure 5 of a second embodiment of the invention in which the prime mover is an electric motor; and,
  • Figure 9 is a sectional schematic elevation similar to Figure 5 of a second embodiment of the invention in which a coupling is interposed between the prime mover and the driven shaft.
  • a rotary diamond cutting machine in the embodiment of the invention illustrated in Figures 1 to 6, comprises a base (2) having a baseplate (3) for securing it to a worktop or the like.
  • the base supports a horizontal rotatable driven shaft (4) by way of a single air bearing (5) that is of generally elongate shape so as to provide required stability to the driven shaft when it is rotated at high-speed.
  • the air bearing is operatively fed with air under pressure by way of a plurality of radially and axially spaced air inlets (6) communicating with an air reservoir (7) formed5 within the base.
  • the shaft has a flange assembly (8) for mounting a working disc (9), in this instance a phosphor bronze cutting disc.
  • the other end of the shaft has a turbine (10) secured to it.
  • the turbine has an endless series of pockets (11) formed in its outer cylindrical surface that are to receive a jet of compressed air that emanates from constricted nozzles (12) formed in a turbine cover (13).
  • constricted nozzles (12) formed in a turbine cover (13).
  • the turbine may be coated with it special hardened coating of a suitable type.
  • An air inlet (16) to the base supplies compressed air to the air reservoir (7).
  • the entire flange assembly, turbine, and shaft are thus rotatable in unison, in use, relative to the base and turbine cover.
  • the turbine may be provided with two oppositely directed endless series of pockets (17) in an outer cylindrical surface thereof, as illustrated in Figure 7.
  • the working disc could be replaced by a polishing disc to provide for polishing facilities utilising a single machine.
  • the arrangement is substantially identical to that described above except that the turbine and cover are replaced by components including windings of an induction or brushless electric motor that create a rotor (18) of an electric motor and that forms its part of the rotatable shaft assembly and a stator (19) that is fixed to the baseplate (20) and that includes cooperating windings of an induction or brushless electric motor.
  • suitable electronic switching means indicated by numeral (21) it is envisaged that high rotational speeds will be achieved thereby resulting in the advantages indicated above.
  • a coupling (22) can be interposed between the rotor (23) and the driven shaft (24), as illustrated in Figure 9.
  • a coupling is preferably a non-contact coupling such as a magnetic coupling that utilizes permanent magnets, electromagnets, or magnetism created by any Eddy currents.
  • certain types of fluid couplings may operate effectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

L'invention concerne une machine de taille de diamant rotative (1) comprenant une base (2) sur laquelle est monté un arbre mené rotatif (4) par l'intermédiaire d'au moins un palier (5), cet arbre comprenant un ensemble bride (8) sur lequel un disque de travail (9) peut être monté de façon à être entraîné simultanément à l'arbre. L'arbre est colinéaire à un rotor (10, 18) d'un moteur d'entraînement destiné à impartir une force motrice de rotation pour entraîner fonctionnellement l'arbre, ce rotor étant fixé directement à l'arbre mené ou couplé à celui-ci par l'intermédiaire d'un coupleur, généralement un coupleur magnétique. Ledit rotor peut être une turbine (10) à entraînement fluidique, généralement pneumatique, auquel cas la turbine comprend de préférence une série sans fin de poches (11) formées dans une surface cylindrique extérieure de celle-ci et dans lesquelles un jet d'air comprimé peut être dirigé. Dans une variante, le rotor (18) peut être un rotor de moteur électrique sans balai ou à induction. La machine selon l'invention comprend de préférence un palier (5) central unique, avantageusement un palier à air.
PCT/IB2007/002423 2006-09-11 2007-08-23 Machine de taille de diamant rotative à grande vitesse Ceased WO2008032152A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200607564 2006-09-11
ZA2006/07564 2006-09-11

Publications (1)

Publication Number Publication Date
WO2008032152A1 true WO2008032152A1 (fr) 2008-03-20

Family

ID=38904573

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/002423 Ceased WO2008032152A1 (fr) 2006-09-11 2007-08-23 Machine de taille de diamant rotative à grande vitesse

Country Status (1)

Country Link
WO (1) WO2008032152A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016010851A (ja) * 2015-09-17 2016-01-21 株式会社デンソー 回転加工装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2061149A (en) * 1979-10-16 1981-05-13 Gersan Ets A gemstone cutting machine
WO1983003119A1 (fr) * 1982-03-08 1983-09-15 Flink, Claes, Henrik Machine-outil entrainee par un milieu sous pression
EP1214915A1 (fr) * 2000-12-12 2002-06-19 Sirona Dental Systems GmbH Instrument dentaire avec un outil mû via une transmission à couplage magnétique
DE10234494A1 (de) * 2001-09-28 2003-04-24 Ind Tech Res Inst Ausgleicheiseinrichtung und Verfahren zum Ausgleichen von axialen Vorstell- und Schwingmöglichkeiten bei einer rotierenden Welleneinrichtung mit einem Scheidwerkzeug

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2061149A (en) * 1979-10-16 1981-05-13 Gersan Ets A gemstone cutting machine
WO1983003119A1 (fr) * 1982-03-08 1983-09-15 Flink, Claes, Henrik Machine-outil entrainee par un milieu sous pression
EP1214915A1 (fr) * 2000-12-12 2002-06-19 Sirona Dental Systems GmbH Instrument dentaire avec un outil mû via une transmission à couplage magnétique
DE10234494A1 (de) * 2001-09-28 2003-04-24 Ind Tech Res Inst Ausgleicheiseinrichtung und Verfahren zum Ausgleichen von axialen Vorstell- und Schwingmöglichkeiten bei einer rotierenden Welleneinrichtung mit einem Scheidwerkzeug

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016010851A (ja) * 2015-09-17 2016-01-21 株式会社デンソー 回転加工装置

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