Method and apparatus for finishing grooved articles
AssigneesNippon Denso Co., Ltd., Asmo Co., Ltd.
InventorsYoshimichi Shirai, Hiromitu Ibe, Yasutosi Kada, Kazushi Sugishima
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Abstract
Grooves in an article such as a commutator are filled with a soft brittle material before a grooved surface of the article is cut. With the grooves thus filled, the cutting is performed continuously and smoothly without involving formation of burrs projecting into the groove. The soft brittle material includes a water soluble material which can easily be removed from the grooves by merely immersing the article in water. Preferably, the soft brittle material comprises a sublimable material which is self-vanishing or disappearing as it undergoes sublimation to the vapor state when it is left to stand in the atmosphere.
Claims14
A method of finishing a grooved surface of an article, comprising the steps of:
- (a) filling each in the grooved surface with a sublimable material;
- (b) thereafter, cutting the grooved surface;
- and
- (c) exposing the sublimable material to atmospheric conditions thereby removing the sublimable material from the groove by sublimation of the sublimable material to a vapor state.
Dependencies are inferred from the claim text.