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Initial position setting method for grinding device

Imported: 24 Feb '17 | Published: 06 Jan '04

Yasuhito Eto, Kenichi Watanabe, Yoshiyuki Hatano

USPTO - Utility Patents

Abstract

An initial position setting method for grinding work apparatus includes: a grind stone

11; a pair of lens rotating shafts

14, 14 which are capable of approaching and drawing apart each other along a normal line of the grind stone

11; a ditch excavation grind stone

23 and chamfering grind stones

24, 25. A measurement standard

70 with a predetermined shape is adapted to be held by the lens rotating shafts

14, 14. The ditch excavation grind stone

23 and the chamfering grind stones

24, 25 are adapted to be moved to the predetermined position. The lens rotating shafts

14, 14 are adapted to be moved in order for the measurement standard

70 to contact with the ditch excavation grind stone

23 or the chamfering grind stones

24, 25 to obtain a moving distance of the lens rotating shafts

14, 14 when the measurement standard

70 is contacted and to carry out an initial setting for moving distance of the ditch excavation grind stone or the chamfering grind stones on a basis of the moving distance of lens rotating shafts

14, 14 and a dimension of the measurement standard.

Description

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view to show a schematic structure of a lens grinding work apparatus in which an initial position setting method in accordance with the present invention is enforced.

FIG. 2 is an explanatory view to show a structure of driving mechanism of the lens grinding work apparatus shown in FIG.

1.

FIG. 3 is an explanatory view to show a structure of adjusting means for distance between the shafts.

FIG. 4 is an explanatory view to show a chamfering work unit.

FIG. 5 is a perspective view to show a carriage arm, a carriage base and so on.

FIG.

6(A) is an explanatory view to show schematically structure by which the adjusting means for distance between the shafts is supported.

FIG.

6(B) is an explanatory view to show a shaft of the adjusting means for distance between the shafts which is supported by a shaft bearing.

FIG. 7 is a block diagram to show a structure of principal part of a controlling system for the lens grinding work apparatus.

FIG. 8 is a block diagram to show a structure of principal part of a controlling unit.

FIG.

9(A) is a left side view to show a measurement standard.

FIG.

9(B) is a front view to show the measurement standard.

FIG.

9(C) is a right side view to show the measurement standard.

FIG. 10 is an explanatory view to show a state in which the ditch excavation grind stone is contacted with an end portion of a third disk of the measurement standard.

FIG. 11 is an explanatory view to show a state in which the lens axis is shifted along Y direction.

FIG. 12 is an explanatory view to show a state in which the ditch excavation grind stone is contacted with an end portion of a second disk of the measurement standard.

FIG. 13 is an explanatory view to show a positional relation between the measurement standard and the ditch excavation grind stone.

FIG. 14 is an explanatory view to show a state in which a grinding work is performed on a lens to be operated.

FIG.

15(A) is an explanatory view to show a state in which the chamfering grind stone is contacted with the third disk of the measurement standard.

FIG.

15(B) is an explanatory view to show a state in which the chamfering grind stone is contacted with an end portion of the second disk of the measurement standard.

FIG. 16 is an explanatory view to show a state in which the third disk of the measurement standard runs upon an end portion of a mirror finishing work grind stone.

FIG. 17 is an explanatory view to show a state in which a first disk of the measurement standard runs upon an end portion of the mirror finishing work grind stone.

Claims

1. Method for setting initial position of grinding work apparatus comprising the steps of:

2. Method for setting initial position of grinding work apparatus according to claim 1, wherein said measurement standard is composed with a first disk having a predetermined diameter and a second disk which is coaxially disposed outside of the first disk, and whose diameter is smaller than that of the first disk; and wherein initial setting of the ditch excavation grind stone or the chamfering grind stone is performed utilizing said measurement standard.

3. Method for setting initial position of grinding work apparatus comprising the steps of:

4. Method for setting initial position of grinding work apparatus according to claim 3, wherein said V shape grind stone is a V shaped ditch V shape grind stone having a V shaped ditch; wherein the measurement standard is composed with a first disk which has a predetermined diameter and a chevron shape to be engaged with the V shaped ditch of said V shaped ditch V shape grind stone, a second disk which is coaxially disposed outside of the first disk and whose diameter is smaller than that of the first disk, and a third disk which is coaxially disposed outside of the second disk and whose diameter is smaller than that of the second disk; and wherein initial setting of the V shape grind stone or the flat grind stone is performed utilizing the measurement standard.