Patent ID: 8701530
Filing Date: 2014-04-22
Classification: B23B,Y10T

Abstract:
1. A method of cutting a thin-walled material having an inner round surface and an outer round surface over a predetermined range in the direction parallel to a central axis thereof, the method comprising the steps of: (A) preparing a material having a suitable stock for obtaining the thin-walled material; (B) cutting the inner round surface by a desired distance within the predetermined range by feeding a cutting tool relative to the material by the desired distance from one end side to the other end side of the central axis while rotating the material around the central axis; (C) cutting the outer round surface by a desired distance within the predetermined range by feeding the cutting tool relative to the material by the desired distance from one end side to the other end side of the central axis while rotating the material around the central axis; and (D) finishing the inner round surface and the outer round surface over the predetermined ranges by alternately repeating the steps (B) and (C), wherein the step (D) is performed in order of the step (B) and the step (C) or in order of the step (C) and the step (B), after the step (A).