EP0445568A1 - Procédé pour la fabrication d' un disque de meulage pour le meulage des bords de lentilles de lunettes - Google Patents

Procédé pour la fabrication d' un disque de meulage pour le meulage des bords de lentilles de lunettes Download PDF

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Publication number
EP0445568A1
EP0445568A1 EP91102312A EP91102312A EP0445568A1 EP 0445568 A1 EP0445568 A1 EP 0445568A1 EP 91102312 A EP91102312 A EP 91102312A EP 91102312 A EP91102312 A EP 91102312A EP 0445568 A1 EP0445568 A1 EP 0445568A1
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EP
European Patent Office
Prior art keywords
grinding wheel
ring
wheel according
grinding
base body
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
EP91102312A
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German (de)
English (en)
Other versions
EP0445568B1 (fr
Inventor
Hans-Robert Dr.-Ing. Meyer
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.)
Saint Gobain Diamantwerkzeuge GmbH and Co KG
Original Assignee
Ernst Winter and Sohn Diamantwekzeuge GmbH and Co
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
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Application filed by Ernst Winter and Sohn Diamantwekzeuge GmbH and Co filed Critical Ernst Winter and Sohn Diamantwekzeuge GmbH and Co
Publication of EP0445568A1 publication Critical patent/EP0445568A1/fr
Application granted granted Critical
Publication of EP0445568B1 publication Critical patent/EP0445568B1/fr
Anticipated expiration legal-status Critical
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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
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/0018—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for by electrolytic deposition
    • 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

Definitions

  • the invention relates to a grinding wheel for grinding spectacle lens edges, containing a base body and a grinding surface made of diamond and metal. These are peripheral disks, but in particular also profiled disks.
  • This abrasive coating made of diamond and metal already has a relatively low thickness in the order of magnitude of approximately 3 mm or less due to its production, diamond particles having a size of approximately 250 ⁇ m or smaller being distributed.
  • Circumferential grinding wheels which have a base body and an abrasive coating in the above sense, the base body having a central hole with which it is clamped onto a spindle. This applies to all versions, whereby special perforation profiles are included.
  • metal is bronze
  • that of different types such as pure bronze, silver bronze, cobalt bronze, etc., is galvanically deposited Use nickel or, in extreme cases, also hard metal.
  • base bodies made of steel and bronze were primarily used for a diamond and metal abrasive coating.
  • the known lenses are particularly unsuitable when machining spectacle lens edges, because, according to the above considerations, they lead to rejects either due to the transmission of imbalances, rigid designs, inability to dampen, or from the outset asymmetrical designs.
  • the invention has for its object to provide a grinding wheel of the type mentioned with high-precision grinding properties in terms of accuracy even when processing an extremely brittle and thin material under economic conditions.
  • the base body consists essentially of plastic in a grinding wheel with a grinding surface made of diamond and metal and a ring made of a metallic material is arranged between the base body and the grinding surface.
  • the damping is low and the joining problematic because the application of the abrasive coating to the steel ring requires an expensive pretreatment of the same.
  • the abrasive coating is sintered on, for example if a bronze ring is deposited, there is a risk of the bronze ring collapsing under the temperature and pressure conditions when the abrasive coating is sintered on.
  • the claimed design of a basic body essentially made of plastic, in connection with the interposed ring made of metallic material for the diamond and metal abrasive coating surprisingly brings about a vibration behavior with regard to damping or rigidity, which ensures a gentle material intervention.
  • the depositing of the specified abrasive coating with a ring made of metallic material ensures symmetry and accuracy and, with the properties of the metallic material, also ensures particularly favorable heat dissipation in the disk. This is essential for a plastic core, be it with fillers. What is important, however, is the interposition of the ring made of metallic material of the specified properties to improve the joining ability, ie the circumferential strength and the engagement stability of the materials of the disk, which only ensures that a precision instrument is created.
  • a particularly advantageous feature of the invention is that the metallic material of the ring has a strength that can withstand the forces that occur during sintering. This creates a cheap base.
  • the metallic material of the ring is more heat resistant than the abrasive coating.
  • the preferred embodiment is that the ring consists of copper.
  • the ring consists of bronze, in particular tempered bronze.
  • the ring is made of aluminum, and it should not be excluded that the ring is made of steel. This version is subject to the problems of joining described above, but otherwise has the stated advantages.
  • the ring preferably has a thickness of up to 10% of the radius of the grinding wheel. This creates a sufficiently strong deposit for the sintering of the abrasive coating. This applies preferably to the more advantageous design of the ring made of copper.
  • the thickness of the ring is in the order of 3 to 10 mm.
  • a combination between the abrasive coating and the metallic ring is already achieved.
  • the base body is particularly advantageously made of a synthetic resin, in particular with fillers.
  • Suitable thermoplastics and thermosets can be used as synthetic resins with regard to heat resistance and mechanical strength.
  • Phenolic resin e.g. Bakelite
  • Other phenol-formaldehyde condensation products are also included.
  • Other thermoplastics and thermosets are possible, but the preferred embodiment leads to particularly favorable properties with regard to strength, machinability and elasticity through the chosen introduction of fillers. Most of these are fibrous materials.
  • Carbon or glass fibers, optionally also asbestos fibers, and / or metals are particularly preferably provided as fillers.
  • the invention is based on a grinding wheel with a diamond and metal abrasive coating. It is preferred that bronzes, electrodeposited nickel, hard metals or other metal alloys are mainly used as the metal in the abrasive coating. Bronze is particularly advantageous because it can be applied inexpensively and inexpensively to a metallic ring. Here, however, a steel ring is used less, which requires a special and expensive pretreatment to apply bronze.
  • thermosets of the plastic base body have advantageous properties, especially in connection with a copper intermediate ring between the abrasive coating and the plastic base body.
  • the preferred embodiment of the invention therefore consists in a grinding wheel with a sintered abrasive coating with diamond particles in the order of magnitude of 3 to 250 ⁇ m and a metal, in particular copper layer, which has a ring-shaped carrier with good thermal conductivity, based on a base body of the grinding wheel, forms.
  • This disc is relatively light, but also sufficiently strong in terms of stress.
  • the assembly consisting of the metallic ring and the abrasive coating, which are composed in particular by sintering on the main body.
  • An advantageous embodiment is that the ring-shaped assembly is applied by shrinking. This also has the advantage of a tight contact with the circumferential surface of the base body, so that the machining, provided that it takes place under normal metallic tolerances, is facilitated. The shrinking creates an absolutely firm connection to the disk-shaped base body with the result that a high-precision tool is then created.
  • the ring-shaped assembly made of abrasive coating and ring is glued to the base body, but the adhesive layer is then so small that elasticities are excluded. It must always be assumed that the invention relates to a peripheral disk.
  • the invention creates a new grinding tool with special properties precisely in connection with the processing of glass. It can be assumed that the plastic base body can be machined precisely. It is less subject to external influences than metal, i.e. in the event of thermal expansion. These properties would be adversely affected if significant amounts of metal were introduced.
  • a damping carrier with low mass is essential for grinding glass.
  • the plastic is light and damping is. Even if there is an imbalance, it can be cushioned and there is no destruction of the processing material in the form of breakouts.
  • Copper as a heat-conductive deposit has a high thermal conductivity and creates a secure connection.
  • a direct joint is initially provided on the damping plastic base body with the metallic base.
  • the plastic base body is designed with increased thermal conductivity on its circumference in the vicinity of the abrasive coating, including the metallic ring.
  • thermally conductive substances in particular metals, are introduced into the plastic base body, which extend from the outside to a maximum of 20% of the radius in the body.
  • the copper deposit mentioned several times above is an advantageous feature that is used in the preferred embodiment because the abrasive layer is used to the end and particularly good heat dissipation can be achieved.
  • the grinding wheel is a profiled or cylindrical peripheral wheel, as can be used for grinding the edges of glasses.
  • it consists of an abrasive coating 1.
  • This has a thickness of approximately 3 mm.
  • It consists of diamond particles as grinding wheels, which are held in a binder, advantageously bronze.
  • This is a sintered abrasive coating on a copper ring 2, which is designed as a metallic, ring-shaped carrier, has good thermal conductivity, but still has sufficient stability to support the abrasive coating in a defined manner.
  • This copper ring 2 is arranged on a base body 3, which consists of synthetic resin, in particular of a phenolic resin according to the above statements. Fillers (not shown in the drawing) are advantageously arranged in this phenolic resin, which can consist of glass or carbon fibers.
  • metal particles for example made of aluminum, particularly in the vicinity of the joint between the ring 2 and the base body 3, in order thereby to improve the heat transfer.
  • the ring 2 can be applied to the base body 3 by gluing or shrinking.
  • the base body has a central hole 4, by means of which it can be applied to a spindle of a grinding machine.
  • the profiling which can be seen in FIG. 2, is suitable for grinding an eyeglass lens edge with a customary, projecting web.
  • cylindrical, non-profiled grinding wheels are used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP91102312A 1990-03-03 1991-02-19 Procédé pour la fabrication d' un disque de meulage pour le meulage des bords de lentilles de lunettes Expired - Lifetime EP0445568B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4006660A DE4006660A1 (de) 1990-03-03 1990-03-03 Schleifscheibe zum schleifen von brillenglasraendern
DE4006660 1990-03-03

Publications (2)

Publication Number Publication Date
EP0445568A1 true EP0445568A1 (fr) 1991-09-11
EP0445568B1 EP0445568B1 (fr) 1994-08-10

Family

ID=6401327

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91102312A Expired - Lifetime EP0445568B1 (fr) 1990-03-03 1991-02-19 Procédé pour la fabrication d' un disque de meulage pour le meulage des bords de lentilles de lunettes

Country Status (7)

Country Link
US (1) US5645476A (fr)
EP (1) EP0445568B1 (fr)
JP (1) JP3196030B2 (fr)
AT (1) ATE109710T1 (fr)
DE (2) DE4006660A1 (fr)
DK (1) DK0445568T3 (fr)
ES (1) ES2058952T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998001259A3 (fr) * 1996-07-05 1998-03-12 Darex Corp Machine de precision a affûter des forets et ensemble meule pour cette derniere
WO1998030360A1 (fr) * 1997-01-13 1998-07-16 Winter Cvd Technik Gmbh Corps abrasif
EP1332013A4 (fr) * 2000-09-28 2005-01-05 Inland Diamond Products Compan Meule a biseau permettant l'elimination des copeaux
AT518251B1 (de) * 2016-03-15 2017-09-15 Tyrolit - Schleifmittelwerke Swarovski K G Schleifscheibe
CN108838910A (zh) * 2018-06-21 2018-11-20 江苏赛扬精工科技有限责任公司 一种树脂基无心磨砂轮及其制备方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4334887C2 (de) * 1993-02-02 1995-01-05 Wernicke & Co Gmbh Verwendung eines Schleifwerkzeugs zum Bearbeiten des Umfangsrandes und/oder deroptischen Oberfläche von Brillengläsern aus Kunststoff
JPH09103940A (ja) * 1995-08-07 1997-04-22 Ricoh Co Ltd 電解インプロセスドレッシング研削砥石および電解インプロセスドレッシング研削方法および電解インプロセスドレッシング研削装置
US5891206A (en) * 1997-05-08 1999-04-06 Norton Company Sintered abrasive tools
US6213860B1 (en) * 1998-02-04 2001-04-10 Unicorn Abrasives Limited Grinding wheel
JP2003039331A (ja) 2001-08-01 2003-02-13 Noritake Co Ltd 樹脂製コア部を有する砥石車とその製造方法及び再利用方法
DE102017116851B4 (de) * 2017-07-25 2020-06-04 Lukas-Erzett Vereinigte Schleif- Und Fräswerkzeugfabriken Gmbh & Co. Kg Schleifwerkzeug und Verwendung eines solchen Schleifwerkzeuges
KR102948592B1 (ko) * 2021-01-14 2026-04-03 현대자동차주식회사 연마를 위한 그라인딩 휠

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2226607A (en) * 1938-06-07 1940-12-31 Gilmore Abrasive surface and method of preparing the same
FR1087350A (fr) * 1953-07-23 1955-02-23 Outil abrasif et procédé de sa fabrication
DE1020460B (de) * 1951-07-19 1957-12-05 Pilkington Brothers Ltd Verwendung einer Kupferlegierung als Werkstoff fuer die Schleifflaechen von Schleifwerkzeugen fuer Tafelglas
US3957593A (en) * 1975-01-31 1976-05-18 Keene Corporation Method of forming an abrasive tool
DE2716415A1 (de) * 1977-04-14 1979-01-18 Joern J Jessen Methode zur herstellung von schleif- u.ae. koerpern- oder elementen
AT378345B (de) * 1982-03-18 1985-07-25 Swarovski Tyrolit Schleif Schleifwerkzeug
DE3530974C1 (en) * 1985-08-30 1987-03-05 Wernicke & Co Gmbh Grinding wheel for machining the edges of spectacle glasses, and a process for producing it
DE3537331A1 (de) * 1985-10-19 1987-04-23 Wernicke & Co Gmbh Verfahren zum herstellen, insbesondere einer brillenglasrandschleifscheibe oder -ringscheibe
DE3533248C1 (en) * 1985-09-18 1987-07-02 Werner Foppe Process for producing milling cutters by equipping with macro grains of abrasive materials, such as silicon carbide
SU449554A1 (ru) * 1971-12-30 1990-01-07 Предприятие П/Я Р-6543 Алмазный прав щий ролик

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2275339A (en) * 1941-02-08 1942-03-03 Allison Company Abrasive cutting wheel
US2475517A (en) * 1946-08-13 1949-07-05 Carborundum Co Abrasive article of manufacture
US3290834A (en) * 1964-07-15 1966-12-13 Frederick W Lindblad Grinding wheel
US3868233A (en) * 1973-03-12 1975-02-25 Norton Co Grinding wheel core
US4010583A (en) * 1974-05-28 1977-03-08 Engelhard Minerals & Chemicals Corporation Fixed-super-abrasive tool and method of manufacture thereof
US4037367A (en) * 1975-12-22 1977-07-26 Kruse James A Grinding tool

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2226607A (en) * 1938-06-07 1940-12-31 Gilmore Abrasive surface and method of preparing the same
DE1020460B (de) * 1951-07-19 1957-12-05 Pilkington Brothers Ltd Verwendung einer Kupferlegierung als Werkstoff fuer die Schleifflaechen von Schleifwerkzeugen fuer Tafelglas
FR1087350A (fr) * 1953-07-23 1955-02-23 Outil abrasif et procédé de sa fabrication
SU449554A1 (ru) * 1971-12-30 1990-01-07 Предприятие П/Я Р-6543 Алмазный прав щий ролик
US3957593A (en) * 1975-01-31 1976-05-18 Keene Corporation Method of forming an abrasive tool
DE2716415A1 (de) * 1977-04-14 1979-01-18 Joern J Jessen Methode zur herstellung von schleif- u.ae. koerpern- oder elementen
AT378345B (de) * 1982-03-18 1985-07-25 Swarovski Tyrolit Schleif Schleifwerkzeug
DE3530974C1 (en) * 1985-08-30 1987-03-05 Wernicke & Co Gmbh Grinding wheel for machining the edges of spectacle glasses, and a process for producing it
DE3533248C1 (en) * 1985-09-18 1987-07-02 Werner Foppe Process for producing milling cutters by equipping with macro grains of abrasive materials, such as silicon carbide
DE3537331A1 (de) * 1985-10-19 1987-04-23 Wernicke & Co Gmbh Verfahren zum herstellen, insbesondere einer brillenglasrandschleifscheibe oder -ringscheibe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED Section Mech Week 9036, 17 October 1990 Derwent World Patents Index; AN 1990-273056 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998001259A3 (fr) * 1996-07-05 1998-03-12 Darex Corp Machine de precision a affûter des forets et ensemble meule pour cette derniere
EP1234633A1 (fr) * 1996-07-05 2002-08-28 David Bernard Affûteuse de precision pour forêts et montage de meule pour cette dernière
WO1998030360A1 (fr) * 1997-01-13 1998-07-16 Winter Cvd Technik Gmbh Corps abrasif
EP1332013A4 (fr) * 2000-09-28 2005-01-05 Inland Diamond Products Compan Meule a biseau permettant l'elimination des copeaux
EP1875980A1 (fr) * 2000-09-28 2008-01-09 Inland Diamond Products Company Compositions alimentaires comportant des extraits de mélisse
AT518251B1 (de) * 2016-03-15 2017-09-15 Tyrolit - Schleifmittelwerke Swarovski K G Schleifscheibe
AT518251A4 (de) * 2016-03-15 2017-09-15 Tyrolit - Schleifmittelwerke Swarovski K G Schleifscheibe
CN108838910A (zh) * 2018-06-21 2018-11-20 江苏赛扬精工科技有限责任公司 一种树脂基无心磨砂轮及其制备方法

Also Published As

Publication number Publication date
DE4006660A1 (de) 1991-09-05
DE4006660C2 (fr) 1992-10-08
DK0445568T3 (da) 1994-11-21
ES2058952T3 (es) 1994-11-01
US5645476A (en) 1997-07-08
JPH04217462A (ja) 1992-08-07
JP3196030B2 (ja) 2001-08-06
DE59102461D1 (de) 1994-09-15
ATE109710T1 (de) 1994-08-15
EP0445568B1 (fr) 1994-08-10

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