| 摘要 |
PROBLEM TO BE SOLVED: To provide a work machining method by a lathe to machine a cylindrical surface having the axis inclined with respect to a spindle of the lathe. SOLUTION: The lathe is provided with a tool holder controlled by a fixing means to fix the rotation of the spindle and a numerically controlled apparatus to control the position in the X-axis direction and Y-axis direction, and can bold a rotary tool with the axis of rotation in the intersecting direction at a desired angle of inclination to the axis of the spindle. A milling cutter having a cutting blade on a circumferential surface is fitted to the tool holder of the lathe, a work is held by a spindle chuck, the spindle is fixed, and an inclined cylindrical surface of the work is machined by controlling the position x in the cut and feed direction and the position y in the direction orthogonal to the feed of the tool holder while rotating the rotary tool by relating the positions to each other by an arithmetic expression including trigonometric functions.
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