EP0257258A1 - Machine à meuler les bords des verres de lunettes - Google Patents

Machine à meuler les bords des verres de lunettes Download PDF

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Publication number
EP0257258A1
EP0257258A1 EP87109911A EP87109911A EP0257258A1 EP 0257258 A1 EP0257258 A1 EP 0257258A1 EP 87109911 A EP87109911 A EP 87109911A EP 87109911 A EP87109911 A EP 87109911A EP 0257258 A1 EP0257258 A1 EP 0257258A1
Authority
EP
European Patent Office
Prior art keywords
bridge
housing
rocker
pinion
grinding
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.)
Withdrawn
Application number
EP87109911A
Other languages
German (de)
English (en)
Inventor
Fritz Kötting
Günter Barwasser
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.)
Wernicke and Co GmbH
Original Assignee
Wernicke and Co GmbH
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
Application filed by Wernicke and Co GmbH filed Critical Wernicke and Co GmbH
Publication of EP0257258A1 publication Critical patent/EP0257258A1/fr
Withdrawn legal-status Critical Current

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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

Definitions

  • the invention relates to a spectacle lens edge grinding machine of the type mentioned in the preamble of the main claim.
  • FR-A-24 81 635 describes an eyeglass lens edge grinding machine in which the rocker arm carrying the eyeglass lens can be axially adjusted by means of a pinion engaging in a toothed rack or the like and a potentiometer detects this axial adjustment.
  • DE-A-1 627 984 also discloses an eyeglass lens grinding machine with a rocker which can be pivoted about a horizontal axis and on which the eyeglass lens is held.
  • the axial movement of the rocker arm is brought about by a friction wheel drive from a motor.
  • the axial adjustment of the rocker can, however, only in a certain Position opposite the friction wheel, which is mounted on the drive shaft of the motor.
  • - DE-A-32 21 713 and US-A-4 176 498 spectacle lens edge grinding machines are known in which the different grinding wheels for pre-grinding and fine sanding are arranged on a slide which is in two horizontal coordinate directions with respect to the spectacle lens and whose template is adjustable.
  • the object of the invention in relation to these known lens edge grinding machines is to make the machine structurally simpler and to achieve a more precise adjustment of the grinding wheel relative to the spectacle lens or of the lens relative to the grinding wheels without additional means, the device for axially adjusting the rocker arm or the Carrying part having grinding wheels can be attached as a unit to the machine housing, for which only a small amount of additional work is required.
  • the invention provides two embodiments that are subject to a uniform inventive concept, the features of which are contained in a main claim and a subsidiary claim. -
  • the characteristics of the Subclaims serve to improve and further develop the features of the claims mentioned.
  • the use of a toothed rack and a pinion guarantees the exact positioning of the rocker arm or of the supporting part on the base frame, whereby it is ensured that the pinion can engage in the toothed rack without slippage.
  • a length of a pulling element or the like is omitted, and a time-consuming assembly of such a pulling element can no longer be provided.
  • the adjusting motor, the coupling, the pinion and the potentiometer are arranged coaxially on a common support frame which is fastened in the machine housing; assembling, assembling and adjusting the parts to each other can take place outside the machine housing, so that it is only necessary to attach the support frame with the parts located in the machine housing.
  • the axis 2 is mounted on the housing G of the machine, in which the grinding wheels are arranged, in an axially adjustable manner (arrow 3, FIG. 2). That's the thing about her Swing arm 1 carrying the spectacle lens is fastened as a machine upper part and can be pivoted from a position in which the spectacle lens is located above the grinding wheels and a position in which the spectacle lens is processed on the grinding wheels.
  • the arrangement of the swing arm 1 holding the spectacle lens between two lens holder shafts as a machine upper part can also be designed in any other way.
  • a pin 5 In one end of the axis 2 in its central axis M, about which the pivoting movement of the rocker 1 takes place, the one end of a pin 5 is screwed in a rotationally fixed manner, which is encompassed by two bearings 7, 8. These bearings are received in a bore 9 of a bridge 10 such that the bridge 10 can be pivoted relative to the axis 2 in the direction of the double arrow 4 (Fig. 1).
  • the bridge In its section 10a, the bridge has a guide bush 11 parallel to the axis 2, through which an axis 12 projects, the end of which is connected to a housing wall by means of clamps 13, 14 or the like.
  • a toothed rack 15 is fastened to it, the row of teeth of which projects downward and with which a pinion 16 arranged under the toothed rack meshes. Together with the parts described below, this forms the drive or adjusting device for the axial movement of the axis 2 and the rocker 1 arranged thereon with the spectacle lens.
  • the pinion 16 is arranged on a shaft 17 (FIG. 3), the free end of which carries the rotatable part of a potentiometer 18, which is fitted in a suitable manner in the machine housing.
  • the shaft 17 is supported by two bearings 19, 20 which are arranged in a flange 21 of a support part 22.
  • This support part carries the potentiometer 18 and has a second flange 23 which is directed parallel to the flange 21 and on whose side remote from the potentiometer 18 and the pinion 16 a motor 24 is arranged in a rotationally fixed manner.
  • Its shaft 25 carries the armature 26 of an electromagnetic clutch 27, the coil 28 of which is located concentrically with the shafts 17, 25. While the armature 26 of the electromagnet is connected to the shaft 25, the coil 28 is connected with its core to the shaft 17.
  • the support member 22 carries on its web 29 a mounting flange 31, by means of which the entire drive and adjustment device of the rocker 1 can be attached in one operation to a wall of the housing, care being taken outside the housing that the pinion 16 is free of play engages in the toothing of the rack 15. Due to the play-free engagement of the pinion in the toothed rack, an exact positioning of the rocker arm 1 is ensured when the engine is at a standstill or when the e-clutch is disengaged.
  • a plate or frame 51 on the machine housing has four bearing blocks 52, 53, which are arranged coaxially in pairs.
  • two guide rods 54, 55 can be inserted through the blocks 52, 53 and fastened in them.
  • a base frame 56 can therefore be adjusted in the direction of the double arrow 57 between the bearing blocks 52 on the one hand and 53 on the other hand on the guide rods 54, 55.
  • the base frame has two projections 58 with bearings 59 through which the guide rods 54, 55 are guided.
  • the base frame 56 supports in pairs or in the vicinity at its corners blocks 60, 61, through which guide rods 62, 63 are also inserted and fastened in the blocks.
  • a bridge-like support frame 66 can be adjusted in the direction of the double arrow 67 with the aid of the bearings 64, 65.
  • the support frame 66 carries at its one free end a motor 68 fixedly flanged to it, the shaft 69 of which passes through the fracture-like support frame and carries the different grinding wheels 70, 71, 72 at the end remote from the motor 68.
  • the end of the bridge-like support frame 66 facing away from the motor 68 and the grinding wheels 70 to 72 has a toothed rack 73 which is firmly connected to it and which is directed with its toothed part 74 against the guide rod 63.
  • the base frame 56 has a shoulder 56a, which has a device corresponding to the drive and adjustment device according to FIG. 3 on a support frame, not shown, and a pinion 75, which in turn engages the rack 73 without play.
  • the effect of the device according to FIG. 4 can be seen in the fact that the grinding wheels 70 to 72 can be adjusted in the direction of the arrow 67 relative to the longitudinally adjustable spectacle lens.
  • the exact position of the spectacle lens with respect to the grinding wheels or the grinding wheels 70 to 72 according to FIG. 4 with respect to the spectacle lens can be determined or adjusted.
  • the electromagnetic clutch 27 serves as a brake, so that for the pre-grinding the drive motor 24, 68 is stopped and the electromagnetic clutch is switched on, so that the rocker arm 1 or the grinding wheel package are held on the support frame 66 in the axial direction.
  • the electromagnetic clutch 27 is switched on and the motor 24 or 68 is also put into action, so that the pinion 16 or 75 in rotation and the rack 15 or 73 are set in axial movement .
  • the motor 24 and the electromagnetic clutch 27 are switched off, so that the rocker arm and, analogously, the support frame 66 with the grinding wheel package can move freely in the axial direction. Should the spectacle lens or the grinding wheels 70 to 72 not have any axial movement during of the sanding results in a position of the parts as in the pre-sanding.
  • a dome-like control template 100 is brought into effect.
  • the motor 24 and the electromagnetic clutch 27 are switched on, so that the rocker arm 1 or the support frame 66 is pressed resiliently in the direction of arrow 101 against the control template 100, with a slippage between the motor shaft 25 and the pinion shaft 17 for this compliant system of the Approach 102 of the pivotable and axially displaceable rocker 1 or the support frame 66 on the control template 10 provides.
  • the actual movement of the parts is detected exactly here by the slip-free connection between the rack 15, 73 and the potentiometer.
  • the supporting part 22 shown in FIG. 3 with its parts arranged thereon serves for both embodiments.
  • this is arranged in a housing on or in this housing, when the grinding wheels are arranged on an adjustable base frame, as in the case of FIG. 4 on the frame 56, the support part 22 is on the base frame arranged.
  • the support part 22 is arranged on the bridge 10 or on the support frame 66 and the rack on the housing or on the base frame 56, but this contrasts with a worsened embodiment the two above-described embodiments insofar as the support part 22 increases the mass of the displaceable elements with its parts, while in the illustrated embodiments only the rack 15 and 73, which is considerably smaller than the mass of the support part, can be regarded as the displaceable mass 22 with its parts.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP87109911A 1986-08-28 1987-07-09 Machine à meuler les bords des verres de lunettes Withdrawn EP0257258A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3629252 1986-08-28
DE3629252 1986-08-28

Publications (1)

Publication Number Publication Date
EP0257258A1 true EP0257258A1 (fr) 1988-03-02

Family

ID=6308360

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109911A Withdrawn EP0257258A1 (fr) 1986-08-28 1987-07-09 Machine à meuler les bords des verres de lunettes

Country Status (3)

Country Link
US (1) US4837978A (fr)
EP (1) EP0257258A1 (fr)
JP (1) JPS6368348A (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1627984A1 (de) * 1966-03-07 1970-01-15 Asselin P H L Maschine zum Abschleifen des Randes,zum Abkanten und zum Nufen von Brillenglaesern
US4176498A (en) * 1978-02-21 1979-12-04 Ait Industries, Inc. Apparatus for edging lenses
FR2481635A1 (fr) * 1980-04-30 1981-11-06 Briot Internal Machine automatique a meuler et biseauter les verres de lunettes
DE3409624A1 (de) * 1984-03-16 1985-09-26 Otto 4010 Hilden Helbrecht Schleifmaschine fuer die raender von brillenglaesern

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3894361A (en) * 1974-09-03 1975-07-15 Dimelp Optical Co Inc Lens grinding machine
GB2041800A (en) * 1979-02-15 1980-09-17 Rodway Optical Ind Ltd Lens edge grinding machine
JPS5843227B2 (ja) * 1980-02-13 1983-09-26 孝正 田窪 自動玉摺機
JPS6049545B2 (ja) * 1982-04-16 1985-11-02 株式会社工研 レンズ加工機
DE3221713A1 (de) * 1982-06-09 1983-12-15 Wernicke & Co GmbH, 4000 Düsseldorf Brillenglasrandschleifmaschine
FR2543039B1 (fr) * 1983-03-22 1985-08-09 Essilor Int Procede pour le biseautage d'une lentille ophtalmique, et machine a meuler automatique correspondante

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1627984A1 (de) * 1966-03-07 1970-01-15 Asselin P H L Maschine zum Abschleifen des Randes,zum Abkanten und zum Nufen von Brillenglaesern
US4176498A (en) * 1978-02-21 1979-12-04 Ait Industries, Inc. Apparatus for edging lenses
FR2481635A1 (fr) * 1980-04-30 1981-11-06 Briot Internal Machine automatique a meuler et biseauter les verres de lunettes
DE3409624A1 (de) * 1984-03-16 1985-09-26 Otto 4010 Hilden Helbrecht Schleifmaschine fuer die raender von brillenglaesern

Also Published As

Publication number Publication date
US4837978A (en) 1989-06-13
JPS6368348A (ja) 1988-03-28

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Inventor name: BARWASSER, GUENTER

Inventor name: KOETTING, FRITZ