US3447528A - Method of drilling hard materials - Google Patents
Method of drilling hard materials Download PDFInfo
- Publication number
- US3447528A US3447528A US641308A US3447528DA US3447528A US 3447528 A US3447528 A US 3447528A US 641308 A US641308 A US 641308A US 3447528D A US3447528D A US 3447528DA US 3447528 A US3447528 A US 3447528A
- Authority
- US
- United States
- Prior art keywords
- drilling
- blade
- jewel
- hard materials
- vibrating
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
- B28D5/021—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by rotary tools, e.g. drills by drilling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
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- 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
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/36—Machine including plural tools
- Y10T408/375—Coaxial tools
Definitions
- the invention relates to a drilling method for the drilling of hard materials, such as watch and clock makers jewels.
- Kurtz #2,377,l59, of May 29, 1945, teaches a method and mechanism for drilling hard substances such as diamonds. Kurtz suggests the use of opposed drill spindles.
- the method for the drilling consists in disposing a pair of spindles carrying drills in coaxial oppositely-moving directions and on opposite sides of a flexible vibrated jewel-carrying blade, and drilling the jewel from its .opposite sides while simultaneously vibrating the blade and the jewel.
- FIGURE 1 is a diagrammatic sectional view of a two spindle machine for drilling watch and clock makers jewels according to the method of the invention
- FIGURE 2 is a sectional view of one detail of the FIG. 1 machine, drawn to a larger scale;
- FIGURE 3 is a plan view of the FIG. 2 detail drawn on the same scale.
- FIGURES 4 to 8 show the drilling process as it takes place when two coaxial spindles are used, but without vibration.
- the machine includes a pair of coaxial spindles 1 and 2 which revolve in bearings 3 and 4 respectively and are driven by air turbines 5 and 6 respectively.
- Each spindle carries a drill 7 or 8 respectively, the two drills being coaxial as to each other and directly opposed to each other.
- Spindle 1 operates by gravity, while spindle 2. is subject to the action of a lever 9 pivoted at 10 and hearing a counterweight 11 which exerts on this spindle an axial force which tends to move it upwardly.
- a vibrating device includes a flexible vibrating blade 12 riveted to a sleeve 13 which is fitted on a fixed shaft 14 carried by a structural part '15 of the machine frame, the sleeve being clamped on shaft 14 by a knurled nut 16.
- the free end of blade 12 is guided by a fixed pin 17 carried by the machine frame, there being a differenceof about one tenth of a millimeter between the diameter of the hole in blade 12 through which pin 17 passes, and the diameter of the pin, to allow free movement of the end of blade 12 during the vibration thereof.
- Blade 12 bears a device, for fixing the object to be drilled thereon, which comprises a flexible clip consisting of a thin disc 20 fixed to the blade by screws 21 and cut out to provide a diametral bridge formed of two parts 20a and 20b separated by a diametral slot 22.
- the fixing device also comprises, at the center of disc 20, a collar 23 which is slotted diametrally so as to constitute two jaw-members 23a and 23b which are carried by the respective parts 20a and 20b of the diametral bridge and are intended to grip resiliently the object to be drilled, in this case a watch or clock makers jewel.
- the parts of the fixing device namely disc 20, jawmembers 23a and 23b carried thereby, and a small plate 24 located beneath disc 20 between the disc and blade 12, may be readily replaced by other parts of different construction according to the form of the object to be drilled and to be held-in position. For this purpose, it is sufiicient first to raise upper spindle 1 and then to undo knurled nut 16 and to remove vibrating blade 12 from shaft 14.
- drills 7 and 8 are in good condition (FIGURE 4), their end faces, designated by 7a and 8a respectively, are plane, the drilling being effected by the abrasive action of the abrasive material which is previously placed on the two faces of the jewel to be drilled, and owing to the waste of the material of the jewel which constitutes also an abrasive material.
- each drill 'as indicated by 7b and 812 respectively is rounded, and due to the wear, so that, when the two drills engage one another (FIGURE 7), they allow between them an annular lip 25a of the material of the jewel which is designated by 25.
- the thicker the jewel the more wear of the drills and the higher the inner lip.
- the vibrating means is arranged in such a way that the amplitude of the vibrations be higher than the height of the lip, i.e. higher than mm. in the disclosed example, the vibrations eliminate the inner lip 250.
Description
June 3, 1969 R. ANNEN METHOD OF DRILLING HARD MATERIALS Filed May 25, 1967 INVENTOR Robert Annen Y PRIOR ART ATTORNEY United States Patent O US. Cl. 125-30 1 Claim ABSTRACT OF THE DISCLOSURE A method used in the drilling of hard materials, e.g. watch and clock makers jewels, including the steps of, disposing a pair of drill-carrying spindles in coaxial oppositely-moving directions "and on opposite sides of a fiexible vibratable jewel-carrying blade, and drilling the jewel from its opposite sides while simultaneously vibrating the blade and jewel carried thereby.
CROSS REFERENCES TO RELATED APPLICATIONS This is a continuation-in-part of my copending application, Ser. No. 404,292, filed Oct. 16, 1964, now abandoned.
BACKGROUND OF THE INVENTION Field of the invention The invention relates to a drilling method for the drilling of hard materials, such as watch and clock makers jewels.
Description of the prior art Known prior art includes Moses, #2,402,831 of June 25, 1946, which teaches a mechanism :for the piercing of refractory bodies such as are used in the manufacture of wire drawing dies. Such mechanism allows the making of a die opening of a definite diameter through the axis of a die b'ody.
Kurtz, #2,377,l59, of May 29, 1945, teaches a method and mechanism for drilling hard substances such as diamonds. Kurtz suggests the use of opposed drill spindles.
Simons, #2,332,609, of Oct. 26, 1943, and Peters et al., #2,622,581, of Dec. 23, 1952, teach the use of drilling machines.
What the prior art references seem to lack is a teaching of the technique of using opposite drills while vibrating.
SUMMARY OF THE INVENTION The method for the drilling consists in disposing a pair of spindles carrying drills in coaxial oppositely-moving directions and on opposite sides of a flexible vibrated jewel-carrying blade, and drilling the jewel from its .opposite sides while simultaneously vibrating the blade and the jewel.
BRIEF DESCRIPTION OF THE DRAWING FIGURE 1 is a diagrammatic sectional view of a two spindle machine for drilling watch and clock makers jewels according to the method of the invention;
FIGURE 2 is a sectional view of one detail of the FIG. 1 machine, drawn to a larger scale;
FIGURE 3 is a plan view of the FIG. 2 detail drawn on the same scale; and
FIGURES 4 to 8 show the drilling process as it takes place when two coaxial spindles are used, but without vibration.
3,447,528 Patented June 3, 1969 DESCRIPTION OF THE PREFERRED EMBODIMENT The machine includes a pair of coaxial spindles 1 and 2 which revolve in bearings 3 and 4 respectively and are driven by air turbines 5 and 6 respectively. Each spindle carries a drill 7 or 8 respectively, the two drills being coaxial as to each other and directly opposed to each other. Spindle 1 operates by gravity, while spindle 2. is subject to the action of a lever 9 pivoted at 10 and hearing a counterweight 11 which exerts on this spindle an axial force which tends to move it upwardly.
A vibrating device includes a flexible vibrating blade 12 riveted to a sleeve 13 which is fitted on a fixed shaft 14 carried by a structural part '15 of the machine frame, the sleeve being clamped on shaft 14 by a knurled nut 16. The free end of blade 12 is guided by a fixed pin 17 carried by the machine frame, there being a differenceof about one tenth of a millimeter between the diameter of the hole in blade 12 through which pin 17 passes, and the diameter of the pin, to allow free movement of the end of blade 12 during the vibration thereof.
An electromagnet 18, supplied with current whose frequency can be modified as necessary, acts on vibrating blade 12 by means of a small plate 19 carried by said blade, so as to maintain the vibration of the latter.
The parts of the fixing device, namely disc 20, jawmembers 23a and 23b carried thereby, and a small plate 24 located beneath disc 20 between the disc and blade 12, may be readily replaced by other parts of different construction according to the form of the object to be drilled and to be held-in position. For this purpose, it is sufiicient first to raise upper spindle 1 and then to undo knurled nut 16 and to remove vibrating blade 12 from shaft 14.
Moreover, the vibrations permit elimination of the inner lip which otherwise would be provided in the hole, as indicated in FIGURES 4 through 8.
As a matter of fact, when drills 7 and 8 are in good condition (FIGURE 4), their end faces, designated by 7a and 8a respectively, are plane, the drilling being effected by the abrasive action of the abrasive material which is previously placed on the two faces of the jewel to be drilled, and owing to the waste of the material of the jewel which constitutes also an abrasive material.
As indicated by FIGURES 5 through 7, the more the drilling operation is carried out, the more the terminal edge of each drill 'as indicated by 7b and 812 respectively, is rounded, and due to the wear, so that, when the two drills engage one another (FIGURE 7), they allow between them an annular lip 25a of the material of the jewel which is designated by 25. The thicker the jewel, the more wear of the drills and the higher the inner lip. For instance, in the case of a jewel of a thickness of mm. in which is drilled a hole of a diameter of mm., the height of the lip, at its base, will be of about A mm. Consequently, if the vibrating means is arranged in such a way that the amplitude of the vibrations be higher than the height of the lip, i.e. higher than mm. in the disclosed example, the vibrations eliminate the inner lip 250.
I claim:
1. In the drilling of hard materials, the method of,
3 disposing a pair of spindles carrying drills disposed in 00- axial oppositely-moving directions-and on opposite sides of a flexible vibrated jewel-carrying blade, and drilling the jewel from its opposite sides while simultaneously vibrating the blade and jewel carried thereby.
References Cited UNITED STATES PATENTS 2,332,609 10/1943 Simmons 125-30 4 2,377,159 5/1945 Kur tz 2 12530 2,402,831 6/1946 Moses 125-30 2,622,581 12/1952 Peters 12530 HAROLD D. WHITEHEAD, Primary Examiner.
US. Cl. X.R. 77-21
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US64130867A | 1967-05-25 | 1967-05-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3447528A true US3447528A (en) | 1969-06-03 |
Family
ID=24571826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US641308A Expired - Lifetime US3447528A (en) | 1967-05-25 | 1967-05-25 | Method of drilling hard materials |
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Country | Link |
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US (1) | US3447528A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4076007A (en) * | 1976-03-29 | 1978-02-28 | Redlin Eugene E | Gemstone drill |
US5404641A (en) * | 1993-08-16 | 1995-04-11 | Avco Corporation | Method of drilling through contiguous plate members using a robotic drill clamp |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2332609A (en) * | 1942-03-17 | 1943-10-26 | Simons Morris | Apparatus for manufacturing wire drawing dies |
US2377159A (en) * | 1943-06-26 | 1945-05-29 | Callite Tungsten Corp | Method of diamond drilling |
US2402831A (en) * | 1943-12-23 | 1946-06-25 | Otis G Ferrier | Machine for piercing refractory bodies |
US2622581A (en) * | 1946-12-23 | 1952-12-23 | Chauncey G Peters | Dry drilling of diamonds and the like |
-
1967
- 1967-05-25 US US641308A patent/US3447528A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2332609A (en) * | 1942-03-17 | 1943-10-26 | Simons Morris | Apparatus for manufacturing wire drawing dies |
US2377159A (en) * | 1943-06-26 | 1945-05-29 | Callite Tungsten Corp | Method of diamond drilling |
US2402831A (en) * | 1943-12-23 | 1946-06-25 | Otis G Ferrier | Machine for piercing refractory bodies |
US2622581A (en) * | 1946-12-23 | 1952-12-23 | Chauncey G Peters | Dry drilling of diamonds and the like |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4076007A (en) * | 1976-03-29 | 1978-02-28 | Redlin Eugene E | Gemstone drill |
US5404641A (en) * | 1993-08-16 | 1995-04-11 | Avco Corporation | Method of drilling through contiguous plate members using a robotic drill clamp |
US5542796A (en) * | 1993-08-16 | 1996-08-06 | Avco Corporation | Robotic drill clamp |
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