Whole spherical surface polishing device
OwnerShoichi Akahaneinventor
Life of this patent
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Abstract
This invention relates to a polishing device which may polish the surface of a hard body such as metal, rock, glass or hard plastics into a perfect spherical shape. Each polishing device may also be applied for the mass-production of lenses, concave and convex. The polishing device comprises three identical polishing dishes mounted on the front ends of three rotating shafts which are positioned on three lines radiating from one point on a plane with an angular interval of 120.degree., respectively. Said polishing dish has a concave polishing surface and the three polishing dishes are adapted to support a body to be polished at the center of the device and to rotate in contact with the body. Therefore, it may be polished into a perfectly spherical shape.
Claims5
Apparatus for lapping a complete spherical surface on a body in one operation, comprising three shafts located in a plane and having axes intersecting at one point in said plane and being angularly displaced from each other by angles of 120.degree.;
- three lapping cups mounted at one of the ends of said shaft at equal distances from said point, each of said cups having a spherical contact surface adapted to contact the body to be processed through an angle of less than 120.degree., said cups being respectively connected to said shafts for rotation therewith and one of said cups being immovably fixed to one of said shafts and the other cups being respectively connected to the other two shafts for a slight tilting movement about said one end;
- bearing means mounting said shafts for rotation and for movement in axial direction;
- biasing means connected to said other two shafts for urging said other two shafts and the cups connected thereto towards said point;
- means engaging the other end of said one shaft for adjusting the axial position thereof;
- and drive means connected to each of said shafts for driving the same respectively at different speeds of rotation so as to revolve a body contacted by said spherical contact surfaces and to lap the whole surface of said body to a perfect spherical shape.
Dependencies are inferred from the claim text.