Machine component and super-finishing method therefor
AssigneeNtn Corporation
InventorsGousuke Itou, Satoshi Fujimoto
Life of this patent
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Abstract
A surface shape of a machining surface of a rotating elastic grindstone is rendered to be a shape appropriate to a to-be-machined surface of a work. With the work being rotated, the rotating elastic grindstone is held in engagement to an end of the to-be-machined surface of the work. The elastic grindstone is moved along a machining trajectory effective to allow the machining surface of the elastic grindstone, which is so formed as to suit to the to-be-machined surface, to follow the to-be-machined surface of the work. The to-be-machined surface of the work so superfinished represents a smooth surface free from any machining trace such as a crossing-angle pattern.
Claims13
A machine component comprising a superfinished surface, the superfinished surface being formed by a rotating elastic grindstone, the rotating elastic grindstone being rotated in a direction counter to a direction of rotation of the machine component, whereby the superfinished surface does not include machined markings and crossing-angle patterns,
- wherein the superfinished surface is an outer peripheral surface and a chamfered portion of an edge of the outer peripheral surface of the machine component.
A superfinishing method comprising:
- superfinishing a machine component with a rotating elastic grindstone, the rotating elastic grindstone being rotated in a direction counter to a direction of rotation of the machine component, the machine component being a bearing component;
- rendering a surface shape of a machining surface of the rotating elastic grindstone to be a sectional shape corresponding to a sectional shape of a to-be-machined surface of a work comprised of a rolling element or a bearing ring for a rolling bearing assembly, which is the bearing component;
- rotating the work and urging the rotating elastic grindstone to an end of the to-be-machined surface of the work;
- and
- moving the elastic grindstone to permit the machining surface of the elastic grindstone, the sectional shape of which corresponds to the sectional shape of the to-be-machined surface, to follow the to-be-machined surface of the work,
- whereby the to-be-machined surface of the work is therefore superfinished.
Dependencies are inferred from the claim text.