WO2005120772A2 - A method of working gemstones - Google Patents
A method of working gemstones Download PDFInfo
- Publication number
- WO2005120772A2 WO2005120772A2 PCT/IL2005/000505 IL2005000505W WO2005120772A2 WO 2005120772 A2 WO2005120772 A2 WO 2005120772A2 IL 2005000505 W IL2005000505 W IL 2005000505W WO 2005120772 A2 WO2005120772 A2 WO 2005120772A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gemstone
- working
- abrading
- rotatable support
- working surface
- Prior art date
Links
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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/35—Miscellaneous
Definitions
- the present invention relates to the field of gemstone working and in particular, to a method of gemstone working enabling rapid gemstone working member exchange and gemstone processing sequence continuation without the need to level the gemstone or the working member.
- the facets must be the right size, have correct angles to each other, and their surfaces must be finely polished with irregularities not larger than a few nanometers.
- the gemstone is mounted on a dop held by a tang and it is leveled with respect to the working member.
- the gemstone leveling procedure provides for the correct angles and right size of the facets.
- the term gemstone includes diamonds, other precious and semi-precious stones.
- European Patent No. 0 299 692 Bl to Blondeel teaches that for gemstone polishing, the scaife axial (vertical run out) position stability is important. Diamonds are especially sensitive to vertical run out. If the axial run out of the diamond impregnated surface of the scaife exceeds +/- 0.005 mm the polished gemstone (especially if it is a diamond) may be fractured. Blondeel uses magnetic levitation and certain predefined rotational frequencies to stabilize the scaife. [0005] As the number of diamonds polished on the same scaife increases, the diamond impregnated surface of the scaife wears out. Sometimes grooves are formed in it and the scaife has to be renewed.
- the scaife is removed from the polishing machine and delivered for so called maintenance.
- the diamond impregnated surface is removed and a new surface, that possesses the same flatness as the original scaife working surface, is formed.
- the scaife has to be balanced. Handling of the scaife, which weighs 15 - 18 kilograms, is not an easy procedure.
- United States Patent No. 5,503,592 to Neumann attempts to solve the problem of using working members having different diamond powder grades.
- Neumann discloses a gemstone working apparatus which includes a rotatable base, two gemstone working members including a first gemstone working member which defines a first gemstone working surface adapted for removable mounting on the base; and a second gemstone working member which defines a second gemstone working surface, of a different grain size than that of the first gemstone working surface.
- the second member is adapted for removable mounting on the base concentrically with the first gemstone working member and has height adjustment means that brings the second working surface into planar alignment (leveling) with the first working surface.
- the surface of the second member wears quicker than the surface of the first member.
- the second surface can however, be replaced.
- this allows performing a sequence of gemstone working operations including second surface replacement in the course of polishing.
- the replacement requires realignment of the surface replaced, which is performed by adjusting the height of the surface of the second working member.
- Replacement of the first member is performed in a conventional way.
- the background art does not teach or suggest a method of working a gemstone and exchanging the working member that does not require leveling of the gemstone or the working surface of the new working member.
- the diamond working industry would benefit if such a method would exist.
- the diamond industry would further benefit if hardware enabling a method of exchanging the working member that does not require leveling of the gemstone or the working surface would exist.
- the present invention provides a method of working a gemstone on a gemstone working member exchange or replacement that does not require any maintenance and leveling procedures. [00012] It is therefore an object of the present invention to provide a method of gemstone, and particularly diamond, working that enables gemstone working member exchange and gemstone processing sequence continuation without the need for leveling the gemstone or the working member.
- An additional object of the present invention is to provide a working member exchange or replacement where leveling of the gemstone being worked or of the working member in the course of a gemstone processing sequence is not required.
- An additional object of the present invention is to provide a gemstone working apparatus facilitating utilization of the gemstone working method.
- the method of working a gemstone includes providing a rotatable support having an axis of rotation and a registering feature.
- the registering feature is operable to determine a registering plane perpendicular to the axis of rotation.
- the method further includes providing a fixture configuration operable to hold the gemstone at an adjustable level relative to the registering plane, and placing the gemstone to be held in the fixture configuration.
- the method also includes providing a plurality of interchangeable abrading articles, each of which has a working surface and each of which is operable to couple to the rotatable support.
- the method includes coupling a first abrading article of the plurality of interchangeable abrading articles to the rotatable support.
- the coupling is followed by leveling of the fixture configuration prior to using the first abrading article, setting the adjustable level to a working level, and working the gemstone on the working surface of the first abrading article.
- the method further includes; replacing the first abrading article by a second abrading article of the plurality of interchangeable abrading articles; coupling the second abrading article to the rotatable support and working the gemstone on the working surface of the second abrading article while maintaining the adjustable level at the working level, without repeating the leveling prior to using the second abrading article.
- rotatable support may be understood as a support having an axis of rotation and a "registering feature”.
- registering feature denotes a feature of the rotatable support, which precisely positions and aligns the abrading article so that its working surface rotates in a predetermined plane, which has a fixed position relative to the gemstone.
- the predetermined plane may be a "registering plane” perpendicular to the axis of rotation of the rotatable support.
- the registering feature is not associated with any specific hardware.
- the registering feature may be a combination of flat and cylindrical surfaces, a single surface such as a convex, concave or conical surface and any other arrangement that ensures precise position and alignment of the abrading article so that its working surface rotates in a predetermined plane.
- the working surface of the abrading article is coated with abrasive material.
- the abrasive material is diamond powder.
- the diamond powder may be of a single grade or sections of the abrading article may be coated by different grades of diamond powder.
- the working surface of each of the plurality of abrading articles may be coated by diamond powder of different grades, as may be required by a particular gemstone working sequence.
- the distance from the working surface to the registering plane is substantially identical for each of the plurality of interchangeable abrading articles when coupled to the rotatable support.
- the rotatable support consists of a single material.
- the rotatable support may consist of more than one material.
- the interchangeable abrading article is operable to couple to the rotatable support via the registering feature.
- the working is selected from the group consisting of polishing and grinding.
- the present invention provides for using the method of working a gemstone in existing conventional gemstone working machines. It also enables and promotes construction of gemstone working apparatuses characterized in that they are specially adapted for use of the method.
- the rotatable support may be built in such a way that it installs on the existing gemstone working machine in a way similar to a conventional scaife. This enables application of the method of working a gemstone to existing gemstone working equipment while preserving the earlier made investments and further reducing the gemstone working costs.
- Figures 1 A, IB and 1C illustrate some elements of prior art gemstone working method
- Figures 2 A - 2D are schematic illustrations of exemplary embodiments of the hardware enabling the method of working a gemstone of the present invention
- Figure 3 is a schematic illustration of an abrading article coupled with the rotatable support which is a part of the present invention.
- Figure 4 is a schematic illustration of the method of working a gemstone of the present invention.
- Figure 1 A shows a spindle type working member or scaife 100, commercially available from NOVEX GmbH., Nuremberg, 90473 Germany and other sources.
- Working member 100 is a heavy, cast iron, horizontally spinning metal wheel having a rotational axis or shaft 102; a section 104 of rotational axis 102 is adapted to engage a gemstone working machine with a source of rotational movement.
- Working member 100 further has a large and relatively thick disk-like section 108 the working surface 110 of which is impregnated with diamond powder.
- Fixture configuration 116 involves one or more devices for holding gemstone 120 at a particular angle and height relative to working surface 110.
- Configuration 116 may include a dop 122 and a tang 124.
- Fixture configuration 116 may be a hand-held block that travels back and force in the direction indicated by arrow 130 on horizontal surface 128.
- configuration 116 may be an automatic block that moves gemstone 120 back and force on surface 128.
- the present invention provides a method of working a gemstone and particularly diamonds, enabling gemstone working member exchange and gemstone process sequence continuation without the need to level the gemstone or the working member.
- working in the context of the present invention includes polishing and grinding of gemstones and other precious and semi-precious stones.
- the method of working a gemstone includes providing (Block 220, Figure 4) a rotatable support 140 ( Figure 2A) having a support section 138, axis of rotation 142 and a registering feature.
- the term "registering feature” denotes a feature of the rotatable support, which precisely positions and aligns abrading article 160 so that its working surface 162 rotates in a predetermined plane, which has a fixed position relative to the gemstone.
- the predetermined plane may be a "registering plane” and the registering feature is operable to determine a registering plane 148 perpendicular to the axis of rotation of rotatable support.
- the registering feature is not associated with any specific hardware.
- a combination of flat surface 146 of rotatable support 140 and a cylindrical section 144 with axis of rotation 142 provide the function of the registering feature.
- a combination of flat surface 152 of rotatable support 150 and cylindrical section 154 of protrusion 156 of support 150 provides the function of the registering feature.
- Figure 2C shows a rotatable support 170 having a convex (concave) surface 172
- Figure 2D shows a section of axis of rotation or shaft 182 having conical surface 184.
- Conical surface 184 may also have a key or a number of grooves engaging complementary sections of abrading article 180. Surfaces 172 and 184 may provide the function of the registering feature.
- the method further includes providing a fixture configuration 116 (Block 220) operable to hold gemstone 120 at an adjustable level relative to the registering plane 148, and placing gemstone 120 into fixture configuration 116.
- the method also includes providing a plurality of interchangeable abrading articles 160.
- Each of abrading articles 160 has working surface 162 and each abrading article 160 is operable to couple with rotatable support 140.
- Working surface 162 of abrading article 160 is coated with abrasive material.
- the preferred abrasive material is diamond powder. Any method of coating by diamond powder such as impregnation, electroplating or use of adhesive materials is suitable for coating of surface 162.
- working surface 162 may contain sections having different grades of diamond powder for making all gemstone working sequences on the same working surface.
- the working surface of each of the plurality of abrading articles may be coated by diamond powder of different grades, as may be required by a particular gemstone working sequence.
- an abrading article may have different forms, although the simplest form of abrading article 160 is a disk-like article.
- Surface 162 is a flat surface having a high degree of flatness. Flatness of surface 162 is especially important if the abrading article rests on flat surface 146 of rotatable support 140.
- abrading article 160 would have a thickness of 1 mm to 6 mm.
- Rotatable support 140 provides the necessary stiffness keeping working surface 162 flat when working a gemstone.
- Abrading article 180 ( Figure 2D) has no support and should be thick enough not to wobble under the pressure of the worked gemstone.
- the method includes coupling (Block 222, Figure 4) a first abrading article 160 of the plurality of interchangeable abrading articles to rotatable support 140 and retaining it on rotatable support 140.
- Different retaining mechanisms may be operable to retain the abrading article on the rotatable support.
- Figure 2A shows an exemplary embodiment where permanent magnet inserts 200 distributed across rotatable support 140 retain abrading article 160, which, in this case, should be made of a ferromagnetic material. Electromagnetic inserts may replace permanent magnet inserts 200.
- nut 158a in Figure 2B engages thread 158b to retain abrading article 160.
- Figure 2D is an illustration of a similar retaining mechanism where nut 186a engages thread 186b to retain abrading article 180.
- vacuum provided by vacuum pump 178 through rotary joint 176 retains abrading article 172 on rotatable support 170.
- Figure 3 is a schematic illustration of abrading article 160 coupled with rotatable support 190. Vacuum provided by vacuum pump 178 through rotary joint 176 retains abrading article 160 on rotatable support 190.
- fixture configuration 116 is leveled. After this, working (Block 226, Figure 4) of gemstone 120 on working surface 162 of first abrading article 160 may begin.
- one abrading article 160 may be sufficient for working a number of gemstones. There may be cases where only one or more facets of a gemstone were worked on a particular abrading article and the article wears out becoming unusable or the gemstone working sequence requires an abrading article coated by different grades of diamond powder. (Block 228, Figure 4).
- the method further includes (Block 232, Figure 4) replacing first abrading article 160 by a second abrading article of the plurality of interchangeable abrading articles 160; Coupling the second abrading article 160 to rotatable support 140 and working gemstone 120 on the working surface of second abrading article 160 while maintaining the adjustable level at the working level. The leveling process is not repeated prior to using the second abrading article.
- the distance from working surface 162 to registering plane 148 is substantially identical for each of the plurality of interchangeable abrading articles when coupled to rotatable support 140 and working surface 162 that may coincide with registering plane 148.
- the vertical run-out of the registering plane may not exceed +/- 0.005 mm.
- both the abrading article and the rotatable support manufacturing should be subject to tight process control.
- Manufacture of the abrading article may involve repetitive grinding and thermal processing steps that provide the desired flatness, accurate dimensions and prevent any stress accumulation that may cause abrading article 160 to warp and lose flatness.
- Flat surfaces 146, 152 and 192 ( Figure 3) of rotatable supports 140, 150 and 190 may consist of a homogeneous single material. This simplifies surface processing.
- prior art solutions such as United States Patent No. 5,503,592 to Neumann, the magnetic ring and steel support on which the ring rests are both in direct contact with the second member surface. Since the magnetic ring and its steel support are made of two different materials, they cannot be ground to the same surface quality and level of flatness.
- Figure 2A illustrates an exemplary rotatable support 140 of the present invention having magnetic or electro-magnetic inserts 200.
- Magnetic inserts 200 are inserted in troughs made in body-150 of rotatable support 140.
- a material layer exists between magnetic inserts 200 and the lower surface of abrading article 160.
- This method of insertion of permanent magnets provides a homogeneous single material structure to surface 146, which may be thus manufactured with greater accuracy and at a lower expense.
- Use of permanent magnets or electro-magnets necessitates use of ferromagnetic material for the abrading article.
- the abrading article may be made of a non-magnetic material or composite material meeting the above-described manufacturing requirements.
- the rotatable support may consist of more than one material.
- vacuum orifices may be inserts and surfaces 172 ( Figure 2C) and 184 ( Figure 2D) that may have keys or inserts (not shown) made of different materials.
- FIG. 2A illustrates an exemplary form of rotatable support 140 having a form similar to prior art working member 100 ( Figure 1 A) that includes a section 104 adapted to engage a source of rotational movement of a conventional gemstone working machine.
- Such form of rotatable support 140 allows for using an abrading article of the present invention with existing gemstone working machines.
- the exemplary form of rotatable support 140 similar to the conventional working member, was selected for demonstration purposes only. As demonstrated, other forms and shapes of the rotatable support are possible.
- the present invention enables and promotes construction of gemstone working apparatuses characterized in that they are specially adapted for using the method of working gemstones of the present invention.
- the rotatable support is in permanently engaged with a source of rotational movement of the gemstone working apparatus and generally is not replaced or removed from the apparatus.
- the apparatus includes a source of rotational movement, gemstone holding, and leveling means.
- the disclosed method of working a gemstone and particularly diamonds enables gemstone working member exchange and gemstone processing sequence continuation without the need to level the gemstone or the working member.
- Replacement of the abrading article does not change the distance from the working surface to the registering plane, which is substantially identical for each of the plurality of interchangeable abrading articles when coupled to the rotatable support and does not cause the need to level the gemstone being worked or the working surface of the abrading article. This reduces the time required for working a gemstone and further reduces the gemstone working cost.
- the abrading article which is part of the present invention does not require maintenance. When the working surface of the abrading article wears out it is simply replaced. This eliminates the need to handle a heavy working member, its balancing and transportation and reduces gemstone-working costs.
- the cost of manufacturing the interchangeable gemstone abrading article is lower than the cost of conventional working member (scaife) maintenance. Accordingly, the abrading article may be disposed upon completion of its use.
- the rotatable support may be built in such a way that it installs on existing gemstone working machines in a way similar to a conventional scaife. This enables application of the method of working a gemstone to existing gemstone working equipment while preserving the earlier made investments and further reducing the gemstone working costs.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Adornments (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05738992A EP1755825A4 (en) | 2004-06-14 | 2005-05-15 | A method of working gemstones |
US11/628,038 US20080038997A1 (en) | 2004-06-14 | 2006-11-30 | Method of Working Gemstones |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL162502 | 2004-06-14 | ||
IL16250204A IL162502A0 (en) | 2004-06-14 | 2004-06-14 | A method of working gemstones |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005120772A2 true WO2005120772A2 (en) | 2005-12-22 |
WO2005120772A3 WO2005120772A3 (en) | 2006-02-02 |
Family
ID=35503689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IL2005/000505 WO2005120772A2 (en) | 2004-06-14 | 2005-05-15 | A method of working gemstones |
Country Status (7)
Country | Link |
---|---|
US (1) | US20080038997A1 (en) |
EP (1) | EP1755825A4 (en) |
CN (1) | CN1933937A (en) |
IL (1) | IL162502A0 (en) |
RU (1) | RU2006142313A (en) |
WO (1) | WO2005120772A2 (en) |
ZA (1) | ZA200700341B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LU91240B1 (en) * | 2005-05-15 | 2007-01-12 | Romedix Ltd | Apparatus and article for polishing precious stones |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104440412A (en) * | 2014-11-27 | 2015-03-25 | 安顺市西秀区璞玉奇石加工厂 | Jade polishing method |
CN104669071B (en) * | 2015-01-22 | 2016-11-30 | 湖南大学 | A kind of polishing processing technique of composite |
CN106926059B (en) * | 2017-03-02 | 2019-10-01 | 辽宁科技大学 | A kind of device and method of automatic grinding spheroidal gem and jade |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2206825B (en) * | 1987-07-14 | 1991-11-06 | Gersan Ets | Gemstone polishing apparatus |
US5558564A (en) * | 1993-10-22 | 1996-09-24 | Ascalon; Adir | Faceting machine |
US5503592A (en) * | 1994-02-02 | 1996-04-02 | Turbofan Ltd. | Gemstone working apparatus |
BE1009003A3 (en) * | 1994-12-20 | 1996-10-01 | Wetenschappelijk En Tech Onder | Method and device for grinding stones. |
US6793561B2 (en) * | 1999-10-14 | 2004-09-21 | International Business Machines Corporation | Removable/disposable platen top |
US6676495B1 (en) * | 2000-08-30 | 2004-01-13 | Lee Valley Tools Ltd. | Power sharpening system |
IL168588A (en) * | 2005-05-15 | 2010-06-30 | Sarin Polishing Technologies L | Apparatus and article for polishing gemstones |
-
2004
- 2004-06-14 IL IL16250204A patent/IL162502A0/en unknown
-
2005
- 2005-05-15 WO PCT/IL2005/000505 patent/WO2005120772A2/en not_active Application Discontinuation
- 2005-05-15 ZA ZA200700341A patent/ZA200700341B/en unknown
- 2005-05-15 EP EP05738992A patent/EP1755825A4/en not_active Withdrawn
- 2005-05-15 CN CN200580008207.2A patent/CN1933937A/en active Pending
- 2005-05-15 RU RU2006142313/02A patent/RU2006142313A/en not_active Application Discontinuation
-
2006
- 2006-11-30 US US11/628,038 patent/US20080038997A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of EP1755825A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LU91240B1 (en) * | 2005-05-15 | 2007-01-12 | Romedix Ltd | Apparatus and article for polishing precious stones |
BE1017313A5 (en) * | 2005-05-15 | 2008-06-03 | Sarin Polishing Technologies Ltd | APPARATUS AND ARTICLE FOR POLISHING PRECIOUS STONES. |
Also Published As
Publication number | Publication date |
---|---|
RU2006142313A (en) | 2008-06-10 |
US20080038997A1 (en) | 2008-02-14 |
IL162502A0 (en) | 2005-11-20 |
WO2005120772A3 (en) | 2006-02-02 |
CN1933937A (en) | 2007-03-21 |
EP1755825A4 (en) | 2007-09-26 |
EP1755825A2 (en) | 2007-02-28 |
ZA200700341B (en) | 2008-05-28 |
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