LENS SPHERICAL FACE GRINDING METHOD AND DEVICE

PROBLEM TO BE SOLVED: To provide a method and device for grinding the surface of a lens material into a spherical face with a grinding tool, particularly suitable for rough grinding using a cup grinding tool to actualize short-time rough grinding of a lens resulting in improved lens machining produc...

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Bibliographic Details
Main Author OBATA TOMOAKI
Format Patent
LanguageEnglish
Published 02.04.2009
Subjects
DRESSING OR CONDITIONING OF ABRADING SURFACES
FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
GRINDING
MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING
PERFORMING OPERATIONS
POLISHING
TRANSPORTING
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Summary:PROBLEM TO BE SOLVED: To provide a method and device for grinding the surface of a lens material into a spherical face with a grinding tool, particularly suitable for rough grinding using a cup grinding tool to actualize short-time rough grinding of a lens resulting in improved lens machining productivity. SOLUTION: The lens spherical grinding method comprises gripping the lens material 4 with a lens holder 12 provided at the shaft end of a rotary work shaft 1, and rotating the cup grinding tool 3a in circular contact with the surface 43 of the lens material after ground to grind the surface 43 of the lens material into a spherical face. Instead of a conventional means for roughly grinding the lens material 4 while applying axial grinding feed to the cup grinding tool 3a, the cup grinding tool 3a fed by a predetermined grinding allowance e is circularly moved from the peripheral edge side of the lens material 4 to the center around a curvature center O of the lens surface 43 after ground. The grinding is completed with one rocking operation of a wheel shaft 25a. COPYRIGHT: (C)2009,JPO&INPIT
Bibliography:Application Number: JP20070239612