EP2529886B1 - Procédé de meulage de surface sphérique de verre d'optique utilisant une meule en forme d'assiette - Google Patents

Procédé de meulage de surface sphérique de verre d'optique utilisant une meule en forme d'assiette Download PDF

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Publication number
EP2529886B1
EP2529886B1 EP10844519.8A EP10844519A EP2529886B1 EP 2529886 B1 EP2529886 B1 EP 2529886B1 EP 10844519 A EP10844519 A EP 10844519A EP 2529886 B1 EP2529886 B1 EP 2529886B1
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EP
European Patent Office
Prior art keywords
rotational speed
dish
processing pressure
grinding
lens
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.)
Not-in-force
Application number
EP10844519.8A
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German (de)
English (en)
Other versions
EP2529886A4 (fr
EP2529886A1 (fr
Inventor
Hideo Kojima
Hiroshi Fukuzawa
Yoshiyuki Otsuki
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Kojima Engineering Co Ltd
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Kojima Engineering Co Ltd
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Publication date
Application filed by Kojima Engineering Co Ltd filed Critical Kojima Engineering Co Ltd
Publication of EP2529886A1 publication Critical patent/EP2529886A1/fr
Publication of EP2529886A4 publication Critical patent/EP2529886A4/fr
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Publication of EP2529886B1 publication Critical patent/EP2529886B1/fr
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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
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/02—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor by means of tools with abrading surfaces corresponding in shape with the lenses to be made

Definitions

  • the swinging mechanism 11 is capable of causing the dish-shaped grindstone 8 to swing in a set swinging direction with a set swing angle ⁇ and a set processing radius R about a swing center O in which the spherical grindstone surface 8a is positioned on the center axial line 2a.
  • the processing data for the present experimental example are as follows: Lens blank material TAFD25 Degree of wear of the lens blank 90 Knoop hardness of the lens blank 630 Processing spherical surface radius R 108 mm Lens outside diameter 37.5 mm Dish-shaped grindstone Diamond pellet SP60B #800

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Claims (5)

  1. Procédé de meulage de surface sphérique de lentille en utilisant une meule en forme de disque (8), laquelle meule en forme de disque pourvue d'une surface de meule sphérique (8a) pourvue de grains abrasifs en diamant est pressée à une pression prédéterminée contre une surface à meuler d'une ébauche de lentille cible de meulage (7), et dans un tel état, la surface à meuler est meulée sur une surface sphérique alors que la meule en forme de disque est mise en rotation et pivotée à une vitesse de rotation prédéterminée,
    le procédé étant caractérisé en ce qu'il comprend :
    un processus de meulage d'étape initiale pour effectuer un meulage dans lequel la pression de traitement est une première pression de traitement et la vitesse de rotation est une première vitesse de rotation ;
    un processus de meulage d'étape intermédiaire pour effectuer un meulage dans lequel la pression de traitement est une deuxième pression de traitement et la vitesse de rotation est une deuxième vitesse de rotation ; et
    un processus de meulage de dernière étape pour effectuer un meulage dans lequel la pression de traitement est une troisième pression de traitement et la vitesse de rotation est une troisième vitesse de rotation, dans lequel
    la deuxième pression de traitement est une pression à laquelle la surface de meule sphérique peut mordre dans l'ébauche de lentille, une quantité de morsure de la meule en forme de disque est obtenue à partir d'une dureté de l'ébauche de lentille et d'une aire de contact entre la surface à meuler de l'ébauche de lentille et la surface de meule sphérique de la meule en forme de disque, et la deuxième pression de traitement est calculée sur la base de la quantité de morsure ;
    la deuxième vitesse de rotation est fixée à une vitesse de rotation à laquelle les grains abrasifs en diamant de la meule en forme de disque peuvent mordre dans l'ébauche de lentille ;
    la première pression de traitement est fixée à une valeur inférieure à la deuxième pression de traitement et la première vitesse de rotation est fixée à une valeur inférieure à la deuxième vitesse de rotation ; et
    la troisième pression de traitement est fixée à une valeur inférieure à la première pression de traitement et la troisième vitesse de rotation est fixée à une valeur inférieure à la deuxième vitesse de rotation et supérieure à la première vitesse de rotation.
  2. Procédé de meulage de surface sphérique de lentille en utilisant une meule en forme de disque selon la revendication 1, caractérisé en ce que
    la deuxième pression de traitement est fixée à une valeur minimum à laquelle les grains abrasifs en diamant de la meule en forme de disque peuvent mordre dans l'ébauche de lentille ; et
    la deuxième vitesse de rotation est fixée à une valeur maximum à laquelle les grains de diamant de la meule en forme de disque peuvent mordre dans l'ébauche de lentille.
  3. Procédé de meulage de surface sphérique de lentille en utilisant une meule en forme de disque selon la revendication 1 ou 2, caractérisé en ce que le processus de meulage d'étape initiale est effectué jusqu'à ce qu'un état soit obtenu dans lequel la surface à meuler de l'ébauche de lentille est en contact avec la surface de meule sphérique entière ; et
    le processus de meulage d'étape intermédiaire est effectué jusqu'à ce qu'un état soit obtenu dans lequel une épaisseur centrale de l'ébauche de lentille est supérieure à une valeur cible d'une dimension fixée à l'avance.
  4. Procédé de meulage de surface sphérique de lentille en utilisant une meule en forme de disque selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'une région dans laquelle la surface à meuler de l'ébauche de lentille coulisse sur la surface de meule sphérique de la meule en forme de disque est changée périodiquement au moins dans le processus de meulage d'étape intermédiaire.
  5. Procédé de meulage de surface sphérique de lentille en utilisant une meule en forme de disque selon l'une quelconque des revendications 1 à 4, caractérisé en ce que :
    la dureté de l'ébauche de lentille est une dureté Knoop de 630 ;
    la deuxième pression de traitement est égale à 10 kg/cm2 et la deuxième vitesse de rotation est égale à 1.500 tr/mn ;
    la première pression de traitement est égale à 2 kg/cm2 et la première vitesse de rotation est gale à 400 à 600 tr/mn ; et
    la troisième pression de traitement est égale à 1,5 kg/cm2 et la troisième vitesse de rotation est égale à 1.000 tr/mn.
EP10844519.8A 2010-01-29 2010-01-29 Procédé de meulage de surface sphérique de verre d'optique utilisant une meule en forme d'assiette Not-in-force EP2529886B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2010/000563 WO2011092748A1 (fr) 2010-01-29 2010-01-29 Procédé de meulage de surface sphérique de verre d'optique utilisant une meule en forme d'assiette

Publications (3)

Publication Number Publication Date
EP2529886A1 EP2529886A1 (fr) 2012-12-05
EP2529886A4 EP2529886A4 (fr) 2015-08-05
EP2529886B1 true EP2529886B1 (fr) 2016-04-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10844519.8A Not-in-force EP2529886B1 (fr) 2010-01-29 2010-01-29 Procédé de meulage de surface sphérique de verre d'optique utilisant une meule en forme d'assiette

Country Status (8)

Country Link
US (1) US20120289127A1 (fr)
EP (1) EP2529886B1 (fr)
JP (1) JP5453459B2 (fr)
KR (1) KR101584265B1 (fr)
CN (1) CN102725104B (fr)
HK (1) HK1174871A1 (fr)
TW (1) TWI415709B (fr)
WO (1) WO2011092748A1 (fr)

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US20160008944A1 (en) * 2013-03-19 2016-01-14 Jun Zha Polishing device for optical elements and method thereof
TWI584914B (zh) * 2013-07-22 2017-06-01 佳能股份有限公司 元件製造方法及拋光裝置
KR101594795B1 (ko) * 2013-07-23 2016-02-17 카부시키가이샤하루치카세이미쯔 요동기구 및 구심요동연마기
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CN106695494B (zh) * 2017-03-07 2019-07-23 徐工集团工程机械有限公司 球面配磨装置及方法
CN107214584A (zh) * 2017-07-06 2017-09-29 衡东县湘峰陶瓷有限公司 全自动稳定型匣钵外表面打磨装置
CN107443183A (zh) * 2017-07-06 2017-12-08 衡东县湘峰陶瓷有限公司 匣钵外表面打磨装置
CN107443184A (zh) * 2017-07-06 2017-12-08 衡东县湘峰陶瓷有限公司 通用型匣钵外表面打磨装置
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CN108422286B (zh) * 2018-03-30 2023-11-03 马鞍山市江南光学有限公司 一种斯米特屋脊棱镜的加工方法及其定位工装

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Also Published As

Publication number Publication date
TWI415709B (zh) 2013-11-21
CN102725104B (zh) 2015-07-01
TW201125680A (en) 2011-08-01
HK1174871A1 (en) 2013-06-21
JPWO2011092748A1 (ja) 2013-05-23
KR101584265B1 (ko) 2016-01-11
WO2011092748A1 (fr) 2011-08-04
EP2529886A4 (fr) 2015-08-05
US20120289127A1 (en) 2012-11-15
KR20120123082A (ko) 2012-11-07
EP2529886A1 (fr) 2012-12-05
CN102725104A (zh) 2012-10-10
JP5453459B2 (ja) 2014-03-26

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