| 摘要 |
<p>The present invention provides a precision roll turning lathe which can form a pattern including three-dimensionally shaped portions, such as three-sided pyramids, on the surface of a roll, with high accuracy. Specifically, a tool post is provided with a tool turning axis (A axis) which is used to turn a tool such that, when forming a spiral groove cut through the roll, a cutting face of a tip of the tool is oriented perpendicular to a direction along which the spiral groove extends.</p> |
