EP0445568B1 - Verfahren zur Herstellung einer Schleifscheibe zum Schleifen von Brillenglasrändern - Google Patents

Verfahren zur Herstellung einer Schleifscheibe zum Schleifen von Brillenglasrändern Download PDF

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Publication number
EP0445568B1
EP0445568B1 EP91102312A EP91102312A EP0445568B1 EP 0445568 B1 EP0445568 B1 EP 0445568B1 EP 91102312 A EP91102312 A EP 91102312A EP 91102312 A EP91102312 A EP 91102312A EP 0445568 B1 EP0445568 B1 EP 0445568B1
Authority
EP
European Patent Office
Prior art keywords
ring
process according
grinding
abrasive coating
grinding wheel
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
Application number
EP91102312A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0445568A1 (de
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6401327&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0445568(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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/de
Application granted granted Critical
Publication of EP0445568B1 publication Critical patent/EP0445568B1/de
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 method for producing a grinding wheel for grinding spectacle lens edges.
  • a grinding wheel for grinding spectacle lens edges has become known, in which sinterable grinding material is calendered with a temporary binder onto a grid or sheet metal strip.
  • the blank thus obtained is formed into a closed ring.
  • the abrasive material layer is sintered before or after the ring is made by applying heat.
  • the finished ring is then drawn with a layer pointing outwards onto a support part which is adapted or adapted to the inside diameter of the ring and connected to it.
  • the abrasive material consists of shares in diamond chips and bronze or a bronze alloy as well as a temporary binder; the support part is made of plastic.
  • the calendering of the abrasive layer onto the sheet metal blank is intended to bring about homogeneity and the clawing of the abrasive material with the lattice or perforated structure of the sheet metal strip is intended to provide a firm connection with this or the supporting part.
  • the blank used must be flexible so that it can be bent into a ring. The same applies to the abrasive material layer.
  • a grinding wheel which consists of a support body, a metal ring applied to the support body and an abrasive layer.
  • the abrasive layer contains diamond chips that are bonded to the metal ring using tungsten sprayed using the plasma process.
  • the metal ring is used to dissipate heat from the diamond cutting during grinding.
  • the invention has for its object to provide a grinding wheel for grinding spectacle lens edges, which grinds the extremely brittle and thin glass material precisely and gently and which can be manufactured especially with relatively little effort.
  • the grinding wheel according to the invention has a one-piece ring made of copper or bronze, which is applied to the base body made of plastic material. It is applied to the base body in close physical contact between the ring and the base body. It can e.g. by shrinking or gluing the ring onto the base body.
  • the ring made of copper or bronze is in one piece and its strength and heat resistance are such that the abrasive coating consisting only of metal and diamond can be applied in a sintering process under pressure and heat.
  • the metal ring also allows the heat generated during grinding to be dissipated.
  • the metallic ring serves as a support body that can be produced with sufficient precision for sintering on the grinding surface at a higher temperature and sufficient pressure.
  • the ring must therefore be designed so that it withstands the stresses in the sintering process.
  • Copper or bronze are selected as the material for the ring in order to achieve sufficient adhesion of the abrasive coating to the metal ring during sintering. This is particularly well guaranteed for copper.
  • the ring of the grinding wheel according to the invention has a thickness of up to 10% of the radius of the grinding wheel and, according to a further embodiment of the invention, can have a thickness which is of the order of 3 to 10 mm.
  • the basic body made of plastic serves to dampen vibrations and reduces the weight of the grinding wheel.
  • it consists of phenolic resin.
  • it can be permeated with fillers, predominantly with fibrous materials. Carbon or glass fibers, possibly also asbestos fibers, are suitable as fillers.
  • Grinding disks for spectacle lens edges often have a profile.
  • an outer peripheral surface of the grinding wheel and the interface between the abrasive coating and the one-piece solid ring each have a profile, the profiles being identical or similar.
  • 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 results in a vibration behavior with regard to damping or rigidity, which ensures a gentle material intervention.
  • the deposit of the specified abrasive coating with a ring made of metallic material ensures the symmetry and accuracy and, with the properties of the metallic material, also ensures particularly favorable heat dissipation in the disk. This is for a plastic core, be it with fillers, essential. What is important, however, is the interposition of the ring made of metallic material with the specified properties to improve the fitability, that is to say the circumferential strength and the engagement stability of the materials of the disk, which only ensures that a precision instrument is created.
  • 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 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 predominantly used as the metal in the abrasive coating. Bronze is particularly advantageous because it can be applied inexpensively and inexpensively to a metallic ring.
  • 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 forms an annularly defined carrier with good thermal conductivity, based on a base body of the grinding wheel.
  • This disc is relatively light, but also sufficiently strong in terms of stress.
  • An advantageous embodiment consists in that the ring-shaped assembly is applied by shrink fitting. 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 the usual 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 of abrasive coating and ring can be glued to the base body, but the adhesive layer is then so small that elasticities are excluded.
  • the invention creates a new grinding tool with special properties especially 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 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-conducting 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 circumference of the plastic base body is carried out in the vicinity of the abrasive coating, including the metallic ring, with increased thermal conductivity.
  • thermally conductive substances in particular metals, can be introduced into the plastic base body, which extend in the body to an area up to a maximum of 20% of the radius from the outside.
  • the grinding wheel is a profiled or cylindrical peripheral wheel, as can be used for grinding the edges of spectacle lenses.
  • 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 rim with a conventional, protruding web.
  • cylindrical, non-profiled grinding wheels are used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (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 Verfahren zur Herstellung einer Schleifscheibe zum Schleifen von Brillenglasrändern Expired - Lifetime EP0445568B1 (de)

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 EP0445568A1 (de) 1991-09-11
EP0445568B1 true EP0445568B1 (de) 1994-08-10

Family

ID=6401327

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91102312A Expired - Lifetime EP0445568B1 (de) 1990-03-03 1991-02-19 Verfahren zur Herstellung einer Schleifscheibe zum Schleifen von Brillenglasrändern

Country Status (7)

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

Families Citing this family (12)

* 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
US5735732A (en) * 1996-07-05 1998-04-07 Bernard; David A. Precision drill sharpener and grinding wheel assembly therefor
DE19800250A1 (de) * 1997-01-13 1998-08-06 Winter Cvd Technik Gmbh Schleifkörper
US5891206A (en) * 1997-05-08 1999-04-06 Norton Company Sintered abrasive tools
DE69903709T2 (de) * 1998-02-04 2003-07-03 Unicorn Abrasives Ltd., Stafford Schleifscheibe
US6840851B1 (en) * 2000-09-28 2005-01-11 Inland Diamond Products Company Bevel edging wheel with swarf clearance
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
AT518251B1 (de) * 2016-03-15 2017-09-15 Tyrolit - Schleifmittelwerke Swarovski K G Schleifscheibe
DE102017116851B4 (de) 2017-07-25 2020-06-04 Lukas-Erzett Vereinigte Schleif- Und Fräswerkzeugfabriken Gmbh & Co. Kg Schleifwerkzeug und Verwendung eines solchen Schleifwerkzeuges
CN111890244B (zh) * 2018-06-21 2022-06-28 江苏赛扬精工科技有限责任公司 一种树脂基无心磨砂轮的制备方法
KR20220102758A (ko) * 2021-01-14 2022-07-21 현대자동차주식회사 연마를 위한 그라인딩 휠

Family Cites Families (16)

* 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
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
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
US3290834A (en) * 1964-07-15 1966-12-13 Frederick W Lindblad Grinding wheel
SU449554A1 (ru) * 1971-12-30 1990-01-07 Предприятие П/Я Р-6543 Алмазный прав щий ролик
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
US3957593A (en) * 1975-01-31 1976-05-18 Keene Corporation Method of forming an abrasive tool
US4037367A (en) * 1975-12-22 1977-07-26 Kruse James A Grinding 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

Also Published As

Publication number Publication date
DE59102461D1 (de) 1994-09-15
JP3196030B2 (ja) 2001-08-06
DK0445568T3 (da) 1994-11-21
ES2058952T3 (es) 1994-11-01
US5645476A (en) 1997-07-08
ATE109710T1 (de) 1994-08-15
DE4006660A1 (de) 1991-09-05
EP0445568A1 (de) 1991-09-11
DE4006660C2 (enrdf_load_stackoverflow) 1992-10-08
JPH04217462A (ja) 1992-08-07

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