EP0745017B1 - Verfahren zur randbearbeitung von brillengläsern - Google Patents
Verfahren zur randbearbeitung von brillengläsern Download PDFInfo
- Publication number
- EP0745017B1 EP0745017B1 EP95909630A EP95909630A EP0745017B1 EP 0745017 B1 EP0745017 B1 EP 0745017B1 EP 95909630 A EP95909630 A EP 95909630A EP 95909630 A EP95909630 A EP 95909630A EP 0745017 B1 EP0745017 B1 EP 0745017B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- process according
- grinding
- grinding lap
- employed
- processing
- 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
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
- B24B9/08—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 glass
- B24B9/14—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 glass of optical work, e.g. lenses, prisms
-
- 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
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- 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
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
Definitions
- the invention relates to a method for Edge processing of glasses with an electric motor driven, rotating grinding wheel, whose peripheral edge with the peripheral edge of the lens is engaged during processing (.see e.g. FR-A-2 648 244).
- Edge processing of glasses is necessary in order to to grind optical glasses in a spectacle frame.
- Grinding machines of the aforementioned type usually have an electric motor drive on the motor axis provided grinding wheels are in rotation depending on the engine power be transferred.
- the devices for edge processing of spectacle lenses have electric motors in a known manner, which typically have a power consumption of 550 Watts are and are mostly used by single-phase electric motors driven.
- the grinding wheels used usually have diameters of less than 120 mm and are at a peripheral speed from about 15 to 25 m / sec. operated.
- Spectacle lenses processed with such devices are shown on their polished edges often so-called edge blowouts that close to the edge Surface layer injured and a danger to represent further glass cracks.
- grinding wheel operation requires peripheral speeds of 25 m / sec and less Use of lubricants for the derivation of the Provide warmth at the grinding point between the Spectacle lens and the grinding wheel through the prevailing Contact pressure arises.
- the use of Abrasives in the processing of spectacle lenses the mainly contain lubricants, not only throws the problem of disposal, but not conditional last but not least due to the rubbing effectiveness of the agent even that the machine parts of the spectacle lens edge grinding machine subject to faster wear.
- the invention is therefore based on the object Generic method in the preamble of the claim 1 specified type in such a way that the Marginal blows largely during processing eliminated the processing times per lens reduced at least 40%, the stock removal rate is to be increased during the grinding process, and the Noise development during processing considerably can be reduced. Furthermore, the lifespan of the tools used, here are in particular naming the grinding wheels increased considerably become. After all, any inaccuracies kept as small as possible during the grinding process become. The aim is to reduce the axis offset and the start-up behavior the grinding wheel can be improved.
- According to the invention is a method for edge processing of glasses with an electric motor driven, rotating grinding wheel, its peripheral edge with the peripheral edge of the lens during processing is engaged, marked in such a way that the peripheral speed of the grinding wheel at least 30 m / sec is.
- the invention is based on the idea that with increased Rotational speed of the grinding wheel more precise abrasion can be caused on the lens can. It turned out that without help of so-called pressure lubricants, the primary serve for cooling during the grinding process with Circumferential speeds of the grinding wheel between 30 and 45 m / sec. can be worked. Thus the Reduce the degree of dropouts by 50%, the processing time to shrink by 20% and the noise level to decrease at least 3 db. It can also be observed that the life of the tools increased by 20% can be.
- the Removal performance of the grinding wheel during the grinding process can be increased by using a liquid Lubricant or coolant pressurized to the Grinding wheel is directed so that the lubricant preferably between the spectacle lens to be edged and the grinding wheel penetrates.
- the lubricant jet should have a jet pressure of at least 0.5 - 1 bar hit the grinding wheel. That way you can Abrasion particles, which are residues in the wells the grinding wheel get caught and rinsed out are so that the abrasion properties of the Do not worsen the grinding wheel during the grinding process.
- the used at the high circulation speeds Grinding wheels are preferably diamond wheels with Diameters between 50 and 120 mm. Particularly suitable a diamond disc with a diameter of 110 mm. So the start-up behavior of the device according to the invention thereby be improved by the grinding wheel equipped with an extra core is, e.g. a plastic or wood core.
- the force with which the spectacle lens is applied to the grinding wheel is pressed is preferably between 3 and 6 kp.
- the delivery worker depends in particular on the choice of material from; the softer the glass material, the lower the Delivery staff.
- a particular advantage of the device according to the invention represents the possibility to edit the Edge processing glasses without pre-grinding, so that the introduction of one in a single grinding process Edge facet through a corresponding profile disc is possible.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Description
Claims (12)
- Verfahren zur Randbearbeitung von Brillengläsern unter Verwendung einer elektromotorisch angetriebenen, rotierenden Schleifscheibe, deren Umfangsrand mit dem Umfangsrand des Brillenglases während der Bearbeitung in Eingriff steht,
dadurch gekennzeichnet, daß die Umfangsgeschwindigkeit der Schleifscheibe wenigstens 30 m/Sek. beträgt. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß die Umfangsgeschwindigkeit der Schleifscheibe zwischen 30 und 45 m/Sek. beträgt. - Verfahren nach dem Oberbegriff des Anspruchs 1, dadurch gekennzeichnet, daß während der Randbearbeitung des Brillenglases ein flüssiger Schmiermittelstrahl mit einem Strahldruck von wenigstens 0,5 - 1 bar auf die Schleifscheibe gerichtet wird.
- Verfahren nach Anspruch 3,
dadurch gekennzeichnet, daß die Umfangsgeschwindigkeit der Schleifscheibe zur Randbearbeitung von Kunststoffgläser vorzugsweise zwischen 40 und 60 m/Sek. und zur Randbearbeitung von Silicatgläser zwischen 30 und 50 m/Sek. beträgt. - Verfahren nach Anspruch 4,
dadurch gekennzeichnet, daß als Schmiermittel Wasser oder eine die Flächenbenetzung fördernde Emulsion verwendet wird. - Verfahren nach einem der Ansprüche 3 bis 5,
dadurch gekennzeichnet, daß das Schmiermittel derart auf die Schleifscheibe gerichtet wird, daß das Schmiermittel zwischen Schleifscheibe und dem randzubearbeitenden Brillenglas gelangt. - Verfahren nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß als Schleifscheibe eine Diamantschleifscheibe mit einem Durchmesser von 110 mm verwendet wird. - Verfahren nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß eine Schleifscheibe mit einen Durchmesser im Bereich zwischen 50 und 120 mm verwendet wird. - Verfahren nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, daß die Zustellkraft, mit der der Umfangsrand des Brillenglases auf die rotierende Schleifscheibe gedrückt wird, zwischen 3 und 6 kp beträgt. - Verfahren nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet, daß ein Elektromotor mit einer Leistungsaufnahme von 400 bis 1000 Watt und Drehzahlen im Bereich von 4000 bis 6000 Umdrehungen/Minute verwendet wird. - Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß als Antriebsmotor der Schleifscheibe ein geregelter 3-Phasen-Elektromotor verwendet wird.
- Verfahren nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet, daß als Antriebsmotor ein geregelter oder ungeregelter Gleichstrommotor verwendet wird, der eine einphasige Netzeinspeisung und ein Getriebe aufweist.
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4404646 | 1994-02-14 | ||
DE4404646 | 1994-02-14 | ||
DE4445735 | 1994-12-21 | ||
DE4445735 | 1994-12-21 | ||
DE19503432A DE19503432A1 (de) | 1994-02-14 | 1995-02-03 | Vorrichtung zur Randbearbeitung von Brillengläsern |
DE19503432 | 1995-02-03 | ||
PCT/DE1995/000183 WO1995021724A1 (de) | 1994-02-14 | 1995-02-14 | Vorrichtung zur randbearbeitung von brillengläsern |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0745017A1 EP0745017A1 (de) | 1996-12-04 |
EP0745017B1 true EP0745017B1 (de) | 1999-05-06 |
Family
ID=27206080
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95909630A Expired - Lifetime EP0745017B1 (de) | 1994-02-14 | 1995-02-14 | Verfahren zur randbearbeitung von brillengläsern |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0745017B1 (de) |
JP (1) | JPH09508588A (de) |
ES (1) | ES2133742T3 (de) |
WO (1) | WO1995021724A1 (de) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3426744C1 (de) * | 1984-07-20 | 1985-08-22 | Flachglas AG, 8510 Fürth | Maschine zum Kantenschleifen von Modellglasscheiben |
DE3503009A1 (de) * | 1985-01-30 | 1986-07-31 | Wernicke & Co GmbH, 4000 Düsseldorf | Verfahren und vorrichtung zum zufuehren von schleiffluessigkeit zur schleifstelle einer brillenglasrandschleifmaschine |
US4839996A (en) * | 1987-11-11 | 1989-06-20 | Disco Abrasive Systems, Ltd. | Method and apparatus for machining hard, brittle and difficultly-machinable workpieces |
WO1989012530A1 (en) * | 1988-06-20 | 1989-12-28 | Siemens Aktiengesellschaft | Sprinkler nozzle arrangement |
FR2648244B1 (fr) * | 1989-06-07 | 1992-04-17 | Briot Int | Machine pour le meulage de verres de correction optique |
DE4035798C1 (en) * | 1990-11-10 | 1992-04-16 | Fortuna-Werke Maschinenfabrik Gmbh, 7000 Stuttgart, De | Supplying liq. coolant to grinding work - feeds coolant by nozzle to contact zone between grinding wheel and workpiece |
JPH05305561A (ja) * | 1992-05-01 | 1993-11-19 | Sumitomo Electric Ind Ltd | 窒化ケイ素系セラミックスの研削加工方法及びその加工製品 |
US5203122A (en) * | 1992-06-05 | 1993-04-20 | United Technologies Corporation | Method of grinding titanium |
-
1995
- 1995-02-14 JP JP7520911A patent/JPH09508588A/ja active Pending
- 1995-02-14 WO PCT/DE1995/000183 patent/WO1995021724A1/de active IP Right Grant
- 1995-02-14 ES ES95909630T patent/ES2133742T3/es not_active Expired - Lifetime
- 1995-02-14 EP EP95909630A patent/EP0745017B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
WO1995021724A1 (de) | 1995-08-17 |
EP0745017A1 (de) | 1996-12-04 |
JPH09508588A (ja) | 1997-09-02 |
ES2133742T3 (es) | 1999-09-16 |
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