| 摘要 |
PURPOSE: To prevent grinding burning at the time of grinding machining by setting a grinding stone contact angle of a grinding stone against an end surface part at a specified value. CONSTITUTION: In case of an article 1 to be machined on which a cylindrical part 1a and an end part 1b are orthogonal with each other, a grinding stone contact angleθbecomes equal to an angular angle. Consequently, when the grinding stone contact angle 9 made by an angular grinding stone 2 and the article 1 to be machined gripped by a chuck 5 is set at more than zero but less than 20 degrees, the angular angle becomes more than zero and less than 20 degrees. Consequently, length (contact arc length) of an outer peripheral surface 2b of the grinding stone 2 simultaneously making contact with a grinding flap of the article 1 to be machined becomes short, and an antiseizing property against grinding burning caused at the time of grinding machining is improved. The reason why zero degree is not included in the grinding stone contact angle 9 is that if zero degree is included in the case of the article 1 to be machined on which the cylindrical part 1a and the end surface part 1b are orthogonal with each other, the cylindrical part 1a interferes with the outer peripheral surface 2b orthogonal with a shaft center 2a of the grinding stone 2.
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