Polishing method

Patent metadata

Field	Value
Publication number	US-9643291-B2
Application number	US-201615066896-A
Country	US
Kind code	B2
Filing date	Mar 10, 2016
Priority date	Nov 11, 2013
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A polishing method comprising: arranging a polishing tool and a workpiece on lower and upper shaft sides of a polishing device, respectively, the polishing tool including: a polishing surface having a spherical zone shape; and a hole that is provided inside the polishing surface and concentric with an outer edge of the polishing surface around a rotation axis on a projection plane orthogonal to the rotation axis, a ratio of an outer diameter of the polishing surface to an inner diameter of the polishing surface being greater than 1.0 and 6.0 or less; and swinging the polishing tool relative to a reference point while rotating the polishing tool around the rotation axis. The reference point is positioned where a straight line, which passes through a center of the workpiece and intersects with the rotation axis, passes through a center of a spherical zone of the polishing surface in width direction.

First claim

What is claimed is:

1. A method for polishing a workpiece executed by a polishing device having a polishing tool, the method comprising the steps of:
arranging the polishing tool on a lower shaft side of the polishing device, the polishing tool including: a polishing surface having a predetermined radius of curvature; and a hole that is provided inside the polishing surface and is concentric with an outer edge of the polishing surface around a rotation axis on a projection plane orthogonal to the rotation axis, wherein the polishing surface has a spherical zone shape, and a ratio of an outer diameter of the polishing surface to an inner diameter of the polishing surface is greater than 1.0 and equal to or less than 6.0, and a ratio of a spherical zone width of the polishing surface to an outer diameter of the workpiece is equal to or greater than 0.9;
arranging only the workpiece on an upper shaft side of the polishing device; and
swinging the polishing tool at a constant swing width with respect to a reference point while rotating the polishing tool around the rotation axis to polish the workpiece, wherein the reference point is provided at a position where a straight line, which passes through a center of the workpiece and intersects with the rotation axis, passes through a center of a spherical zone of the polishing surface in a width direction.

Assignees

• Olympus Corp

Inventors

• Hagiwara Genichiro

Classifications

• B24B13/02 Primary

  by means of tools with abrading surfaces corresponding in shape with the lenses to be made · CPC title

• B24B1/00 Primary

  Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes · CPC title

• B24D7/10

  with cooling provisions · CPC title

• B24B27/0084

  the grinding wheel support being angularly adjustable · CPC title

• B24B13/01

  Specific tools, e.g. bowl-like; Production, dressing or fastening of these tools · CPC title