Koyo Machine Industries Company Limited

Junzo Ikeda

Shizuki Sasakura

Koichi Ueda

Toshio Ishii

Yasuo Yoshimura

A centerless grinder according to the present invention comprises a bed , a grinding wheel spindle stock , a regulating wheel spindle stock , a work rest , and the like. The grinding wheel spindle stock and the regulating wheel spindle stock are respectively moved toward and away from each other by feed devices . The feed devices respectively comprise feed screws each having one end fixed to the work rest . Nuts are respectively retained in the grinding wheel spindle stock and the regulating wheel spindle stock in threading engagement with the feed screws so that axial movements thereof along the feed screws are restricted and rotational movements thereof about axes thereof are permitted. The nuts are respectively rotated by driving motors . In the centerless grinder , the feed screws are fixed to the work rest and, therefore, even if the bed is thermally deformed by heat generated during grinding, a reduction in machining accuracy can be minimized.

Centerless grinding machine

A double side grinding apparatus for thin disklike work comprises a pair of rotatable grinding wheels having opposed circular grinding faces provided by respective end faces and so arranged as to be movable relative to each other axially thereof, and work rotating means for rotating the thin disklike work about its own axis while supporting the work in a grinding position between the grinding faces so that opposite surfaces of the work to be worked on face the respective grinding faces of the pair of the wheels, with an outer periphery of the work intersecting an outer periphery of each grinding face and with the center of the work positioned inwardly of the grinding faces.

Growing community of inventors

Yao, Japan

Junzo Ikeda