| 摘要 |
PROBLEM TO BE SOLVED: To provide a lathe sufficiently performing processing in a vertical direction in a vertical surface of a work.SOLUTION: A lathe includes: a saddle guided by a cross rail and movable along an X-axis direction; an X-axis linearly-driving mechanism moving the saddle in the X-axis direction; a ram 16 movably attached to the saddle along a Z-axis direction as a direction vertical to the saddle; a Z-axis linearly-driving mechanism moving the ram 16 in the Z-axis direction; and a tool holder 2 mounted on the lower end part of the ram 16 and holding a tapered cutter 1. The tool holder 2 includes: a holder body 21 below the ram 16; and a rotation drive transmission mechanism 22 mounted on a holder body 21, transmitting rotation around a Z-axis to the tapered cutter 1 as rotation around an intersecting axis P intersecting with the Z-axis, and having a rotary axis rotating around the intersecting axis P. An angle α of an acute angle part of angles formed between the intersecting axis P and the Z-axis exceeds 0° and is smaller than 90°. |
