Abstract

In a method for fine-processing of an axicon (L) having a concave or convex cone surface (KF) with a cone axis (KA) and a cone angle (α), with use of geometrically indeterminate cutting edges in the form of grain in combination with a liquid at a processing region (BB) of a tool (W2), which is constructed for linear engagement (LE) with the cone surface and has a front end (EB) with respect to the cone axis, material removal is produced at the cone surface by a relative cutting speed which results from a rotational movement of the axicon about the cone axis and a relative oscillating linear movement (oscillation axis R) of the tool, in which the processing region is disposed in linear engagement with the cone surface and its front end moves back and forth in a direction radial with respect to the cone axis.

IPC Classes  ?

• B24B 13/04 - Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other workAccessories therefor grinding of lenses involving grinding wheels controlled by gearing
• B24B 13/06 - Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other workAccessories therefor grinding of lenses, the tool or work being controlled by information carrying means, e.g. patterns, punched tapes, magnetic tapes
• B24B 41/04 - HeadstocksWorking-spindlesFeatures relating thereto

Abstract

The invention relates to a method for finely machining an axicon (L), which has a concave or convex conical surface (KF) with a cone axis (KA) and a cone angle (α), using geometrically undefined cutting edges in the form of bonded or loose grains in combination with a liquid on a machining region (BB) of a tool (W2), which is designed for a linear engagement (LE) with the conical surface and which has a front end (EB) with respect to the cone axis. Material is removed on the conical surface using a relative cutting speed resulting solely from the rotational movement of the axicon about the cone axis and a relative oscillating linear movement (oscillation axis R) of the tool, the machining region being in linear engagement with the conical surface during said linear movement, and the front end of the machining region is moved back and forth in the radial direction in plan view with respect to the cone axis. The invention additionally relates to a device which can be used for said method, said device being installable on a tool spindle of a fine machining device.

IPC Classes  ?

• B24B 41/04 - HeadstocksWorking-spindlesFeatures relating thereto
• B24B 13/06 - Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other workAccessories therefor grinding of lenses, the tool or work being controlled by information carrying means, e.g. patterns, punched tapes, magnetic tapes
• B24B 41/06 - Work supports, e.g. adjustable steadies

Goods & Services

Adhesive tapes, strips, bands and films for industrial use; adhesive pads used to hold optical lenses in place while lenses are being processed.

Goods & Services

Adhesive tapes, strips, bands and films for industrial use; adhesive pads used to hold optical lenses in place while lenses are being processed.

Goods & Services

Adhesives for industrial purposes, including contact adhesives and adhesives to fix grinding pads, polishing pads, polishing foils, polishing cloth, polishing felt, diamond pellets and diamond grinding segments on laps for optical production; optical cements and optical adhesives as well as optical cement foils and optical adhesive foils for cementing and fixing of optical parts on loose and fixed multiple blocks for optical production, namely cementing sealing waxes [fillers], colophony cements, wax cements, cementing resins, ultraviolet cements, ultraviolet adhesives and contact adhesives; foam inhibitors and defoamers for liquid grinding, polishing, lapping and cooling preparations; preservatives for the preserving of liquid coolants and lubricants; solvents for adhesives and adhesive foils for industrial purposes and for protective lacquers for protection of particularly finished polished surfaces fur optical production; chemical liquid cooling preparations and cooling concentrates; chemical coolants for grinding of optical parts. Paints, varnishes and lacquers for industrial purposes; protective lacquers for protecting of particularly finished polished surfaces for optical production as well as thinners for such lacquers, including dip-coating paints for spectacle lenses; anti-corrosive additives for liquid coolants and cooling lubricants; colorants for coloring of optical lenses. Grinding, polishing and lapping abrasives in powder form for the preparation of liquid grinding, polishing and lapping slurries for the processing of particularly optical parts with loose abrasive; system cleaning agents, namely cleaning agents for circulation and supplying facilities used for circulating and supplying liquid grinding, polishing, lapping and cooling preparations as well as cooling lubricants; cleaning agents for machinery in the optical production industry; cleaning agents and cleaning concentrates for optical parts as well as additives therefor, particularly for cleaning machinery and cleaning apparatuses; liquid grinding, polishing and lapping preparations as well as liquid grinding, polishing and lapping concentrates. Machine tools as well as parts thereof; facilities essentially consisting of machinery, apparatuses and devices for the blocking of semi-finished optical parts particularly semi-finished ophthalmic blanks, for further processing thereof, as well as parts thereof, the aforementioned machinery, apparatuses and devices in as far as contained in this class; blocking pieces [parts of machines] from aluminum alloys or plastics and blocking rings [parts of machines] from stainless steel as well as attachment, piano and prism rings [parts of machines] for the blocking of semi-finished optical parts, particularly semi-finished ophthalmic blanks, for further processing thereof; facilities essentially consisting of machinery, apparatuses and devices for mixing, preparing and filtering of liquid grinding, polishing, lapping, cooling, cleaning and lubricating materials as well as parts thereof, including centrifuges and band filter devices, the aforementioned machinery, apparatuses and devices in as far as contained in this class; facilities essentially consisting of machinery, apparatuses and devices for deblocking of optical parts, particularly ophthalmic lenses, as well as parts thereof, the aforementioned machinery, apparatuses and devices in as far as contained in this class; facilities essentially consisting of machinery, apparatuses and devices for preliminary cleaning and coating-ready cleaning of semi-finished optical parts, the aforementioned machinery, apparatuses and devices in as far as contained in this class; facilities essentially consisting of machinery, apparatuses and devices for ultrasonic, brush and/or fluid cleaning as well as drying of parts, particularly optical parts like ophthalmic lenses, as well as parts thereof, the aforementioned machinery, apparatuses and devices in as far as contained in this class; facilities essentially consisting of machinery, apparatuses and devices for the refinement and coating of optical parts, the aforementioned machinery, apparatuses and devices in as far as contained in this class; facilities essentially consisting of machinery, apparatuses and devices for tinting of plastic lenses, the aforementioned machinery, apparatuses and devices in as far as contained in this class; high vacuum coating facilities essentially consisting of machinery, apparatuses and devices for the coating of spectacle lenses, optical lenses and optical parts as well as other articles, including high vacuum coating facilities for the thermal coating by means of electron beam evaporation sources and thermal evaporation sources, with or without ion or plasma support, the aforementioned machinery, apparatuses and devices in as far as contained in this class; sputtering facilities of all kinds, essentially consisting of machinery, apparatuses and devices for the sputtering coating of articles, the aforementioned machinery, apparatuses and devices in as far as contained in this class; CVD and PICVD coating facilities of all kinds, essentially consisting of machinery, apparatuses and devices for the CVD coating [Chemical Vapor Deposition] and PICVD coating [Plasma Impulse Chemical Vapor Deposition] of articles, with or without ion support, the aforementioned machinery, apparatuses and devices in as far as contained in this class; plasma sources and ion [Kaufman-]sources for the ion-supported operation as accessory of the aforementioned coating facilities; facilities essentially consisting of machinery, apparatuses and devices for applying hydrophobic layers, with or without vacuum, the aforementioned machinery, apparatuses and devices in as far as contained in this class; substrate lacquering facilities of all kinds, essentially consisting of machinery, apparatuses and devices for applying hard coatings on substrates, the aforementioned machinery, apparatuses and devices in as far as contained in this class; apparatuses for recovering solvents in the optical production as accessory of the facilities mentioned in this class; electromagnetically or pneumatically operated automation, handling and loading devices for all of the aforementioned facilities, machinery, apparatuses and devices as well as parts thereof, including devices with swivel arm robots, suction devices, belt conveyors and/or tray magazines and devices for carrying substrates; workpiece holder [machine parts] for clamping of optical lenses. Laser centering devices for checking, aligning and cementing of optical parts; devices for measuring the intensity of ultraviolet radiation; dosing devices and dispensers for liquids and paste-like media, particularly optical cements and optical adhesives; devices and instruments for measuring liquid grinding, polishing, lapping, cooling and lubricating materials regarding temperature, pH value, electrical conductivity, density, concentration and/or suspension behavior as well as parts thereof, including aerometers, refractometers, thermometers end measuring devices for the pH value; machinery, devices and instruments for measuring and checking optical components, particularly precision optical lenses and ophthalmic lenses, as well as parts thereof, including aspheric measuring machinery, topography measuring devices, interferometers, spherometer rings with gauges, measuring bars for the measurement of planity, spherometers and torometers for convex and concave surface measurement, center-thickness measuring devices for finished and blocked lenses, lens meters and measuring magnifiers; spectral photometer; test glasses for determining the fringe defect and for checking of work pieces surfaces of lenses, mirrors, prisms and other optical elements; optical lenses, primarily made of glass and plastics, also for ultraviolet and infrared applications, especially ophthalmic lenses with or without coating, in particular anti-reflection coating, and precision optical lenses; lens blanks for ophthalmic lenses; vacuum-coated optical, if applicable quartz containing elements or carriers of glass; vacuum-coated optical, if applicable quartz containing elements or carriers of plastics [testing devices]; devices for the detection of drilled holes and for obtaining the form data of ophthalmic lenses for rimless spectacles as well as parts thereof; devices for detecting the geometrical shape of spectacle frames as well as parts thereof; computer software and computer hardware for the calculation of processing data for optical parts, particularly ophthalmic lenses, for the administration and the transfer of production data to the processing machinery as well as for the surveillance and control of the manufacturing processes; machinery, apparatuses and devices for temperature controlling as well as parts thereof; devices for measuring the pressure at bladder chucks of grinding and polishing machinery; vacuum-leak detectors; substrate test and inspection devices; work benches and cabinets for clean rooms as special furniture for laboratories; magnetrons of all kinds, in as far as contained in this class. Chilling devices and chilling plates for cooling down blocked semi-finished optical parts; water cooling devices, including cascade-cooler; circulating cooler; ultraviolet point and ultraviolet surface radiators for the pre and finish-hardening of ultraviolet cements and ultraviolet adhesives for optical production as well as parts thereat heating cabinets with halogen radiators for the hardening of optical cements and optical adhesives with halogen light, as well as parts thereof; heating devices and heating plates for heating optical parts; tempering furnaces particularly for post oxidation of evaporated coatings and for hardening of lacquer finishes; ovens of all kinds, including static oven and tunnel oven for drying and degassing of optical parts; inspection lamps for surface controlling of optical parts as well as parts thereof. Adhesive foils, except for packing purposes, including adhesive foils for fastening grinding pads, polishing pads, polishing foils, polishing cloth, polishing felt, diamond pellets and diamond grinding segments on laps for optical production. Installation, maintenance, overhauling and repair of machinery, facilities and devices in the optical industry; installation, maintenance and repair of computer hardware in the optical industry. Organization, arrangement and realization of training and educational courses and seminars in connection with optical production. Services of engineers, physicists and mathematicians, including technical project planning, planning of production plants and lab planning for the optical industry, technical consultancy in connection with process technology and the development of process technology in the optical industry; programming, installation, maintenance and updating of computer software in the optical industry; research in the field of optical production; all of the aforementioned services in connection with all of the aforementioned goods.

Goods & Services

Adhesives for industrial purposes, namely, contact adhesives and adhesives to fix grinding pads, polishing pads, polishing foils, polishing cloth, polishing felt, diamond pellets and diamond grinding segments on laps for optical production; contact cements for industrial purposes, namely, optical cements, optical adhesives, optical cement foils and optical adhesive foils for cementing and fixing of optical parts on loose and fixed multiple blocks used in optical production, namely, sealing cement, colophony cements, wax cements, cementing resins, ultraviolet cements, ultraviolet adhesives and contact adhesives; foam inhibitors and defoamer agents used in connection with liquid grinding, polishing, lapping and cooling preparations; chemical preservatives for the preserving of liquid coolants and lubricants; solvents for adhesives and adhesive foils for industrial purposes and solvents used for protective lacquers used on particularly finished polished surfaces used in the production of optical goods; coolants, namely, chemical liquid cooling preparations and cooling concentrates; chemical coolants for grinding of optical parts Paints, varnishes and lacquers for general industrial purposes; protective lacquers for protecting of particularly finished polished surfaces used in optical production and thinners for such lacquers, namely, dip-coating paints used in the production of spectacle lenses; colorants for coloring of optical lenses Industrial abrasives, namely, grinding, polishing and lapping abrasive preparations in powder form for the preparation of liquid slurries used in connection with machines for the grinding, polishing and lapping of optical parts with loose abrasive; system cleaning agents, namely, cleaning agents for circulation and supplying manufacturing facilities used in the optical industry which use liquid grinding, polishing, lapping and cooling preparations and cooling lubricants; cleaning agents for machinery used in the optical production industry; cleaning agents and cleaning concentrates for optical parts and additives therefor, particularly for cleaning machinery and cleaning apparatuses; industrial abrasives, namely, liquid grinding, polishing and lapping abrasive preparations used in connection with machines for the grinding, polishing and lapping and liquid concentrates of grinding, polishing and lapping abrasive preparations used in connection with machines for the grinding, polishing and lapping Machine tools for machining of optical goods and parts thereof; machinery for the blocking of semi-finished optical parts, particularly semi-finished ophthalmic blanks, for further processing thereof, and parts thereof; machine parts, namely, blocking pieces from aluminum alloys or plastics for the blocking of semi-finished ophthalmic part blanks and stainless steel blocking rings for the blocking of semi-finished ophthalmic part blanks; machine parts, namely, attachment rings, plano rings and prism rings for the blocking of semi-finished optical parts, particularly, semi-finished ophthalmic blanks, for further processing thereof; machinery for mixing, preparing and filtering of liquid grinding, polishing, lapping, cooling, cleaning and lubricating materials and parts thereof, namely, centrifuges and band filter; machinery for deblocking of optical parts and ophthalmic lenses, and parts thereof; machinery for preliminary cleaning and coating-ready cleaning of semi-finished optical parts; machinery for ultrasonic, brush and fluid cleaning of optical parts, and parts thereof; machinery for drying of optical parts and ophthalmic lenses, and parts thereof; machinery for the refinement and coating of optical parts; machinery for tinting of plastic lenses; high vacuum coating machinery for the coating of spectacle lenses, optical lenses, optical parts and other articles, namely, high vacuum coating machinery for the thermal coating by means of electron beam evaporation sources and thermal evaporation sources, with or without ion or plasma support; sputter coating machines for the sputtering coating of articles; Chemical Vapor Deposition (CVD) and Plasma Impulse Chemical Vapor Deposition (PICVD) coating machines for the CVD coating and PICVD coating of articles, with or without ion support; accessory parts of coating machines, namely, plasma sources and ion sources for the ion-supported operation of coating machines used in the coating of articles; machinery for applying hydrophobic layers, with or without vacuum, to articles; substrate lacquering machinery, namely, machines for applying hard coatings on substrates; extracting machines for recovering solvents used in the production of optical goods; electromagnetically or pneumatically operated automation, handling and loading devices to be used in connection with machinery used to produce optical goods, namely, industrial robots with swivel arms, suction holders, belt conveyors and/or tray magazines and holding brackets for carrying substrates; machine parts, namely, workpiece holder for use in the clamping of optical lenses Laser centering devices for projecting a visible beam on a work piece when checking, aligning and cementing of optical parts; radiation-measuring instruments for measuring the intensity of ultraviolet radiation; mechanical devices, namely, dispensers of preset portions of liquids and paste-like media, namely, optical cements and optical adhesives for dosing purposes, all not for medical use; instruments for measuring liquid grinding, polishing, lapping, cooling and lubricating materials regarding density, namely, aerometers and parts thereof; instruments for measuring liquid grinding, polishing, lapping, cooling and lubricating materials regarding concentration and/or suspension of ingredients, namely, refractometers and parts thereof; instruments for measuring liquid grinding, polishing, lapping, cooling and lubricating materials regarding temperature, namely, thermometers and parts thereof; instruments for measuring liquid grinding, polishing, lapping, cooling and lubricating materials regarding pH value, namely, pH meters and parts thereof; instruments for measuring liquid grinding, polishing, lapping, cooling and lubricating materials regarding electrical conductivity, namely, conductivity meters and parts thereof; machinery, devices and instruments for measuring and checking optical components, particularly precision optical lenses and ophthalmic lenses, and parts thereof, namely, aspheric measuring machinery, topography measuring devices, interferometers, spherometer rings with gauges, measuring bars for the measurement of planity, spherometers and torometers for convex and concave surface measurement, center-thickness measuring devices for finished and blocked lenses, lensometers and measuring magnifiers; spectral-photometer; test glasses for determining the fringe defect and for checking of workpiece surfaces of lenses, mirrors and prisms; optical lenses, primarily made of glass and plastics, also for ultraviolet and infrared applications, especially ophthalmic lenses with or without coating, in particular anti-reflection coating, and precision optical lenses; lens blanks for ophthalmic lenses; vacuum-coated optical, if applicable quartz containing elements or carriers of glass, namely, discs of glass featuring vacuum-applied coatings and coatings containing quartz for testing purposes, namely, coating thickness control; vacuum-coated optical, if applicable quartz containing elements or carriers of plastics, namely, discs of plastics featuring vacuum-applied coatings and coatings containing quartz for testing purposes, namely, coating thickness control; measuring instruments for the detection of drilled holes and for obtaining the form data of ophthalmic lenses for rimless spectacles and parts thereof; measuring instruments for detecting the geometrical shape of spectacle frames and parts thereof; downloadable and recorded computer software and computer hardware for the calculation of processing data for optical parts, particularly ophthalmic lenses, for the administration and the transfer of production data to the processing machinery and for the surveillance and control of the manufacturing processes; temperature controllers for machinery used in the production of optical goods and parts thereof; pressure gauges for measuring the pressure at bladder chucks of grinding and polishing machinery; leak detectors for use with vacuum pumps; ultrasound substrate and visual inspection devices for optical goods; work benches and cabinets for clean rooms as special furniture for laboratories; magnetrons for use in coating machines Industrial cooling apparatus for cooling down blocked semi-finished optical parts; water cooling installations, namely, cascade-cooler; electric cooler in the nature of a circulating cooler; ultraviolet radiators not for motors and engines, namely, ultraviolet point and ultraviolet surface radiators, and parts thereof, used in optical production for the pre-hardening and finish-hardening of ultraviolet cements and ultraviolet adhesives; electric heating cabinets incorporating halogen heaters for the hardening of optical cements and optical adhesives using halogen light, and parts thereof; heating furnaces for industrial use, namely, heating devices and heating plates for heating optical parts; industrial heating furnaces, namely, tempering furnaces for post oxidation of evaporated coatings and for hardening of lacquer finishes; ovens for industrial use, namely, static ovens and tunnel ovens for drying and degassing of optical parts; inspection lamps, and parts thereof, for use in surface inspection of optical parts Adhesive foils, except for packing purposes, namely, adhesive foils for industrial use for fastening grinding pads, polishing pads, polishing foils, polishing cloth, polishing felt, diamond pellets and diamond grinding segments on lapping tools used for optical production Installation, maintenance, overhauling and repair of machinery, manufacturing facilities and equipment used in the optical industry; installation, maintenance and repair of computer hardware used in the optical industry Arrangement of training, educational courses and seminars in the field of manufacturing processes used in the optical industry Engineering services, namely, technical project planning and design engineering of production plants and laboratory facilities used in the optical industry; consulting services provided by engineers, physicists and mathematicians, namely, technical consultancy in connection with designing process technology in the optical industry; programming, installation, maintenance and updating of computer software used in the optical industry; research in the field of optical production

Goods & Services

Adhesives and adhesive foils for industrial purposes, including contact adhesives, adhesives and adhesive foils for fixing grinding and polishing pads and foils, polishing cloths and felts, as well as diamond pellets and diamond grinding segments on laps in the optical production; soldering means and pastes for the soldering of diamond pellets and diamond grinding segments on grinding laps; optical cements and optical adhesives as well as optical cement and adhesive foils for cementing and fixing of optical parts on loose and fixed multiple blocks in the optical production, namely cementing sealing waxes, colophony cements, wax cements, cementing resins, ultraviolet cements and ultraviolet adhesives as well as contact adhesives; foam inhibitors and defoamers for liquid grinding, polishing, lapping and cooling preparations; preservatives for the preserving of liquid coolants and coolant lubricants; solvents for adhesives and adhesive foils for industrial purposes and for protective lacquers for protecting of particularly finished and polished surfaces in the optical production; chemical cooling preparations and cooling concentrates; chemical coolants for grinding of optical parts; powdery, granulated, pill-shaped or pellet-shaped consumables for the coating of spectacle lenses and other optical components, namely metals, metal oxides, metal nitrides, metal fluorides, metal carbides as well as mixtures thereof; evaporation materials for the forming of water and dirt repellent coatings from perfluorinated carbon-hydroxides, as well as antistatic layers from transparent, conducting metal oxides; anti-corrosive additives for liquid coolants and cooling lubricants; system cleaning agents, namely cleaning agents for circulation and supplying facilities used for circulating and supplying liquid grinding, polishing, lapping and cooling preparations as well as cooling lubricants; cleaning agents for machines for the optical production; cleaning agents and concentrates for optical parts as well as additives therefor, particularly for ultrasonic cleaning machines and apparatuses; liquid grinding, polishing and lapping preparations as well as concentrates. Paints, varnishes and lacquers for industrial purposes; protective lacquers for protecting of particularly finished and polished surfaces in the optical production as well as thinners for such use, including dip-coating paints for spectacle lenses; colorants for colouring of optical lenses; UV-curing and by thermal polymerization curing lacquers for the coating of surfaces in the optical production; lacquers for the scratch-resistant coating of spectacle lenses. Grinding, polishing and lapping abrasives in powder form for the preparation of liquid grinding, polishing and lapping slurries for the processing of particularly optical parts with loose abrasive. Cooling lubricants, including diamond suspensions and diamond lubricants, oxide polishing suspensions, cooling agents and concentrates comprising or not comprising mineral oil for grinding optical parts with diamond tools, mineral oil free lubricants as well as lubricants based on vegetable oil, particularly for the processing of mineral glass and plastics in the optical production, mineral cooling oils for grinding of optical parts and cutting oils; waxes for the blocking of semi-finished optical parts; oils, greases and lubricants for high-vacuum pumps and other vacuum applications. Alloys of common metal for the blocking of semi-finished optical parts; metallic consumables for application in electron beam guns and ion guns, particularly crucible liners and evaporation boats from molybdenum and other high-melting metals as well as filaments from tungsten wire; sputter targets, consisting of metals and metal oxides. Machine-driven tools for optical machinery as well as parts thereof and accessories therefor, included in this class, namely drills, turning tools with blades from tungsten carbide, PCD, CVD or natural diamond, milling heads with PCD blades and blades from tungsten carbide, sintered and electroplated special shape milling cutters, diamond plano cutters, diamond radial milling cutters, diamond circular grinding tools, diamond grinding wheels, diamond plano grinding wheels, diamond slicing wheels, diamond cup grinding wheels, diamond centering wheels, diamond chamfering wheels and discs, diamond hollow drills, diamond grinding segments to cover flat grinding wheels, diamond pellets with metal or resin bond of the diamond particles to cover form tools, sintered and electroplated diamond grinding pads and foils, form tools for grinding, polishing and lapping processing of particularly optical parts by means of bound and loose abrasive, grinding pads, grinding tapes and grinding foils with bound abrasive, polishing base, including polishing pads, polishing discs, polishing tapes, polishing foils, polishing cloths and polishing felts; workpiece chucks (parts of machines) for optical machinery as well as parts thereof, including collet chucks and workpiece holders with membranes; workpiece holders (parts of machines) to clamp optical lenses; blocking pieces (parts of machines) from aluminium alloys or plastics and blocking rings (parts of machines) from stainless steel as well as attachment, plano and prism rings (parts of machines) for the blocking of semi-finished optical parts, particularly semi-finished ophthalmic blanks, for further processing thereof; filter papers, non-woven filter materials and filter cloths, as parts of machines, for filtering of particles from liquid coolants and cooling lubricants; plasma and ion (Kaufman-) sources for the ion-supported operation of coating devices; spare parts for coating devices, particularly graphite and stainless steel anodes, gas distributors, insulators and thermal transfer plates. Monitor crystals from quartz crystal ceramics with a metallic electrode, for layer thickness measurement in coating devices. Self-adhesive protection foils from plastics, except for packing purposes, for protecting particularly, finished and polished surfaces in the optical production. Transport and work trays made of plastic for optical parts.

Abstract

An apparatus for the machining of optical workpieces of materials of non-brittle hardness, particularly of plastics material spectacles lenses, has a holder, which is operatively connected with an actuator for reciprocating movement, and a support, which is fixable to the holder and to which a cutting tip of monocrystalline diamond, which has an arcuate cutting edge, is fastened. In order to be able to use the cutting edge over its curve length to avoid of premature wear in the rotary machining, provision is made for a positioning device, by which the support is fixable in at least two different relative positions with respect to the holder to dispose substantially different circumferential sections of the cutting edge for the rotary machining.

IPC Classes  ?

• B23B 27/20 - Cutting tools of which the bits or tips are of special material with diamond bits
• B23B 5/00 - Turning-machines or devices specially adapted for particular workAccessories specially adapted therefor
• B23B 27/16 - Cutting tools of which the bits or tips are of special material with exchangeable cutting bits, e.g. able to be clamped

Abstract

A tool for polishing and fine-grinding optically active surfaces in precision optics has a main body which can be attached in a rotationally fixed manner to a tool spindle of a machining machine. A guide element is arranged concentrically in the main body and is mounted such that it can be displaced axially therein. A machining disk is replaceably attached to the outer end of the guide element. The main body is rigidly connected in a rotationally fixed manner, over the full displacement travel, to the guide element mounted such that it can be displaced axially therein, and in that the machining disk is rigidly fixed in a non-tiltable manner on the guide element.

IPC Classes  ?

• B24B 5/00 - Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfacesAccessories therefor

Abstract

An apparatus (10) for generating a surface (S) on a workpiece (W) is proposed, which comprises a workpiece chuck (17) having a longitudinal axis (L), a spindle (18) for rotating a fly cutting tool (20) having a tool tip (48), and a moving device for moving the spindle generally transverse to the axis (L). The spindle further has a rotary encoder (42) for detecting an angle of tool rotation (γ), wherein the chuck is operatively connected with a fast workpiece servo (50) capable of moving it over short distances at high velocities. The servo is controllable taking into account the given angle of tool rotation so that the workpiece can be advanced toward and retracted from the tool in a defined manner while being cut by the tool tip. The limited geometry of the tool can thus be modified by moving the workpiece relative to the tool tip.

IPC Classes  ?

• B23B 27/00 - Tools for turning or boring machinesTools of a similar kind in generalAccessories therefor

Abstract

A fast tool arrangement, in particular for lathes for machining optical workpieces, has a carriage, which for linear reciprocating movements is guided in a housing on bearing elements stationary in relation to the housing, and which at its outer end carries a holder for a tool or workpiece and at its inner end is actively connected with a moving coil drive. The carriage has the cross-section of a T-profile with plane-parallel flange and web faces wherein the bearing elements are arranged in pairs on both sides of the profile web and the profile flange.

IPC Classes  ?

• B23B 3/00 - General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screwSets of turning-machines
• B23B 21/00 - Lathe carriagesCross-slidesTool postsSimilar parts of any machine tools

Abstract

A machine for machining optical workpieces, in particular plastic spectacle lenses, which has a workpiece spindle, which drives the workpiece in rotation about a workpiece rotation axis (B), and a fast tool arrangement, which moves a turning tool in a fast tool movement plane (X-F1), wherein the workpiece spindle and the fast tool arrangement can moreover be moved relative to one another in a plane (X-Y) which contains the workpiece rotation axis (B). The fast tool movement plane (X-F1) is positioned obliquely (work angle α) with respect to the plane (X-Y) containing the workpiece rotation axis (B). As a result, a machine is provided in which the working point of the cutting edge of the turning tool can be aligned in a particularly simple and highly precise manner on the rotation axis (B) of the workpiece spindle.

IPC Classes  ?

• B23B 3/00 - General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screwSets of turning-machines

Abstract

A method for auto-calibration of at least one tool (36) in a single point turning machine (10) used for manufacturing in particular ophthalmic lenses (L) is proposed, in which a test piece of special, predetermined geometry is cut with the tool and then probed to obtain probe data. The method subsequently uses the probe data to mathematically and deterministically identify the necessary tool/machine calibration corrections in two directions (X, Y) and three directions (X, Y, Z), respectively, of the machine. Finally these corrections can be applied numerically to all controllable and/or adjustable axes (B, F1, X, Y) of the machine in order to achieve a (global) tool/machine calibration applicable to all work pieces within the machines operating range. As a result two-dimensional (2D) tool/machine calibration and three-dimensional (3D) tool/machine calibration, respectively, can be performed in a reliable and economic manner.

IPC Classes  ?

• G06F 19/00 - Digital computing or data processing equipment or methods, specially adapted for specific applications (specially adapted for specific functions G06F 17/00;data processing systems or methods specially adapted for administrative, commercial, financial, managerial, supervisory or forecasting purposes G06Q;healthcare informatics G16H)
• B24B 1/00 - Processes of grinding or polishingUse of auxiliary equipment in connection with such processes

Abstract

A polishing disk for a tool for the fine machining of optically active surfaces on spectacle lenses in particular is disclosed, which comprises a support body, to which a foam layer is attached, wherein a polishing film bears against the foam layer. The polishing film is provided with at least one opening in a central region. During machining, the opening ensures pressure equalization and makes liquid polishing agent available from inside the foam layer, as a result of which better rinsing and cooling of otherwise disadvantaged regions of the polishing disk is achieved. As a result, a polishing disk of simple and cost-effective design is proposed, which is much more durable than the prior art while achieving high surface qualities.

IPC Classes  ?

• B24B 29/00 - Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents