EP0359594A1 - Werkzeug zum Aussenkonturenfräsen von Polycarbonat-Brillengläsern auf einer konventionellen Schleifmaschine - Google Patents

Werkzeug zum Aussenkonturenfräsen von Polycarbonat-Brillengläsern auf einer konventionellen Schleifmaschine Download PDF

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Publication number
EP0359594A1
EP0359594A1 EP89401771A EP89401771A EP0359594A1 EP 0359594 A1 EP0359594 A1 EP 0359594A1 EP 89401771 A EP89401771 A EP 89401771A EP 89401771 A EP89401771 A EP 89401771A EP 0359594 A1 EP0359594 A1 EP 0359594A1
Authority
EP
European Patent Office
Prior art keywords
tool
groove
tool according
tooth
teeth
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.)
Granted
Application number
EP89401771A
Other languages
English (en)
French (fr)
Other versions
EP0359594B1 (de
Inventor
Jean-Pierre Marie Fernand Langlois
Michel Jean Marcel Lecerf
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.)
Briot International SA
Original Assignee
Briot International SA
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 Briot International SA filed Critical Briot International SA
Publication of EP0359594A1 publication Critical patent/EP0359594A1/de
Application granted granted Critical
Publication of EP0359594B1 publication Critical patent/EP0359594B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
    • 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
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
    • 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
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
    • Y10T407/1908—Face or end mill
    • Y10T407/1924—Specified tool shape
    • 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
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1952—Having peripherally spaced teeth
    • Y10T407/1962—Specified tooth shape or spacing

Definitions

  • the present invention relates generally to the trimming of ophthalmic lenses, and it relates more particularly to a new tool specially adapted for working with polycarbonate spectacle lenses.
  • polycarbonate Due to its particularly remarkable properties of transparency and impact resistance, polycarbonate is increasingly used for the manufacture of safety glasses and even corrective lenses.
  • the object of the invention is to remedy these drawbacks by producing a tool specially adapted for working with polycarbonate and usable on a conventional grinding machine, replacing the usual grinding wheel used for working glass and turning at the same speed. that this one.
  • the subject of the invention is for this purpose a tool for working polycarbonate, adaptable to a conventional machine for grinding ophthalmic lenses, characterized in that it comprises a metal body comprising in its periphery a V-shaped groove, and at least two teeth each consisting of an insert having an identical V-shaped notch, but projecting from said groove, each tooth being preceded, in the direction of rotation of the tool, by an adjoining cavity, and in that the diameter of the tool is greater than the diameter of an ophthalmic lens, and substantially equal to that of a conventional grinding wheel for ophthalmic lenses.
  • the tool comprises from two to five of said teeth.
  • the tool according to the invention comprises a body 1 made of metal, for example steel, in the form of a disc, having on its periphery a groove 2 of V section, similar to that of a conventional grinding wheel. for ophthalmic lenses.
  • Each tooth 3 is constituted by an added plate 4 made of polycrystalline diamond or of tungsten carbide, embedded in a housing 5 in which it is fixed by brazing.
  • each plate 4 projects about 0.3 mm into the groove 2 and has a V-shaped notch 7 of identical shape to that of said groove 2.
  • the V-profile of the notch 7 of the insert 4 is raised relative to the V-profile of the groove 2 of the tool after sharpening.
  • the insert has a surface forming a fillet of approximately 6 ° and the front face of the insert 4 forms an angle of approximately 4 ° relative to the corresponding radius of the body of the tool.
  • Each tooth 3 is preceded, by considering the direction of rotation of the tool (arrow R), by a cavity or clearance 8 curved in said direction of rotation, the curvature of which is that of a circle having a radius of approximately 7 mm, having a depth of about 0.9 mm, a length of about 5 mm and a width equal to that of the plate 4.
  • the angle of the V of the groove 2 and of the plates 4 is between 110 and 130 °, its depth is between 0.7 and 1.2 mm and its width is at least 18 mm.
  • the tool according to the invention is adapted to be fixed in place of the conventional grinding wheel of a machine for grinding ophthalmic lenses, and is used to work the polycarbonate blanks with the same speed of rotation as the conventional grinding wheel.
  • the tool according to the invention thus makes it possible to use a conventional grinder by simple exchange of the grinding wheel instead of using a special machine rotating at high speed with a small diameter cutter.
  • the grinding machine does not require any significant modification. To use the tool according to the invention, it suffices to control the speed of descent of the glass on a conventional grinding wheel, using existing known means, which are not part of the invention.
  • the tool according to the invention has three teeth 3. In practice, this number cannot be less than two and can be increased to five, a number greater than five can, of course, be provided. without departing from the scope of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP89401771A 1988-08-31 1989-06-22 Werkzeug zum Aussenkonturenfräsen von Polycarbonat-Brillengläsern auf einer konventionellen Schleifmaschine Expired - Lifetime EP0359594B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8811404 1988-08-31
FR8811404A FR2635704B1 (fr) 1988-08-31 1988-08-31 Outil pour le detourage des verres de lunettes en polycarbonate sur une meuleuse classique

Publications (2)

Publication Number Publication Date
EP0359594A1 true EP0359594A1 (de) 1990-03-21
EP0359594B1 EP0359594B1 (de) 1992-03-11

Family

ID=9369623

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89401771A Expired - Lifetime EP0359594B1 (de) 1988-08-31 1989-06-22 Werkzeug zum Aussenkonturenfräsen von Polycarbonat-Brillengläsern auf einer konventionellen Schleifmaschine

Country Status (4)

Country Link
US (1) US4978254A (de)
EP (1) EP0359594B1 (de)
DE (2) DE68900969D1 (de)
FR (1) FR2635704B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19908037B4 (de) * 1998-08-07 2006-04-13 Tawakoli, Taghi, Prof. Dr.-Ing. Werkzeug zur Materialbearbeitung

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5318006A (en) * 1990-07-25 1994-06-07 General Electric Company Cutting insert utilizing superabrasive compacts
US5080084A (en) * 1990-10-19 1992-01-14 Kendall Robert M Light saver peep sight for archers
US5297637A (en) * 1992-06-15 1994-03-29 Kennametal Inc. Agricultural disc blade
US5725416A (en) * 1995-12-20 1998-03-10 Russell; Jerry Apparatus and method for making and using a combined cutting/grinding wheel
US6840851B1 (en) * 2000-09-28 2005-01-11 Inland Diamond Products Company Bevel edging wheel with swarf clearance
CN102049536B (zh) * 2010-12-07 2012-03-14 中硬金属切削(大连)有限公司 一种用于粗加工的立装机夹五刃切断刀片

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2277696A (en) * 1939-05-27 1942-03-31 American Optical Corp Abrading tool
BE829172A (fr) * 1975-05-16 1975-09-15 Meule de taillage des cotes plates de verre
DE3542258A1 (de) * 1985-11-29 1987-06-04 Howema Gmbh Wittenborn & Edel Werkzeug fuer die spanabhebende bearbeitung, vorzugsweise fraes- und schleifwerkzeug
US4685440A (en) * 1986-02-24 1987-08-11 Wheel Trueing Tool Company Rotary dressing tool

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT460669A (de) *
US2268599A (en) * 1938-04-22 1942-01-06 American Optical Corp Abrading tool
US2477153A (en) * 1943-12-27 1949-07-26 Anna Louise Succop Milling tool
US3831236A (en) * 1972-01-07 1974-08-27 Coburn Optical Ind Cup-shaped cutting tool having cutting teeth
US4164329A (en) * 1976-12-03 1979-08-14 Lee Heydenreich Chipper roller and knives therefor
US4171926A (en) * 1978-04-21 1979-10-23 American Optical Corporation Lens cutter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2277696A (en) * 1939-05-27 1942-03-31 American Optical Corp Abrading tool
BE829172A (fr) * 1975-05-16 1975-09-15 Meule de taillage des cotes plates de verre
DE3542258A1 (de) * 1985-11-29 1987-06-04 Howema Gmbh Wittenborn & Edel Werkzeug fuer die spanabhebende bearbeitung, vorzugsweise fraes- und schleifwerkzeug
US4685440A (en) * 1986-02-24 1987-08-11 Wheel Trueing Tool Company Rotary dressing tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19908037B4 (de) * 1998-08-07 2006-04-13 Tawakoli, Taghi, Prof. Dr.-Ing. Werkzeug zur Materialbearbeitung

Also Published As

Publication number Publication date
DE359594T1 (de) 1990-09-27
DE68900969D1 (de) 1992-04-16
US4978254A (en) 1990-12-18
FR2635704B1 (fr) 1990-11-02
FR2635704A1 (fr) 1990-03-02
EP0359594B1 (de) 1992-03-11

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