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Patent Searching and Data


Title:
NON-CONTACT PROCESSING METHOD FOR SPHERICAL SURFACE
Document Type and Number:
Japanese Patent JPH0343146
Kind Code:
A
Abstract:

PURPOSE: To make it unnecessary to repair and exchange a tubular jig main body and enhance the stability of the finish quality of a lens processed by forming a fluidized gringing powder layer on the enlarged surface of the tubular jig main body and processing the lens using the grinding powder layer.

CONSTITUTION: A flow passage for a grinding liquid 3 containing free grinding powder 31 is formed while a rotary shaft 15 is included therein and also a tubular jig main body 1 is provided which comprises an enlarged surface 16 formed near the exit 14 of the inner wall 12 of the flow passage. The tubular jig main body 1 is rotated around the rotary shaft 15 and the grinding liquid 3 is forced to flow into the flow passage from the entrance toward an exit 19, and a fluidized grinding powder layer 30 wherein the free grinding powder 31 is highly densified is formed along the enlarged surface 14 by a centrifugal force caused by rotation of the main body 1. Thereafter, the surface 21 to be processed of a lens 2 rotated about a shaft center 22 crossing the rotary shaft 15 of the tubular jig main body 1 at a predetermined angle θ of inclination is pressed into contact with the fluidized grinding powder layer 30 so that the spherical surface of the lens is processed with high accuracy.


Inventors:
IKEDA MITSUAKI
Application Number:
JP1989000178584
Publication Date:
February 25, 1991
Filing Date:
July 11, 1989
Export Citation:
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Assignee:
NIPPON SHEET GLASS CO LTD
International Classes:
B24B13/01; B24B13/00; B24B19/22; B24B37/025; (IPC1-7): B24B13/01; B24B37/02