| 摘要 |
PURPOSE:To operate a lathe to smoothly and accurately attain its rough cutting, by successively cutting a work along the slope of its crest to the top part of the crest even if the work has a crest higher than the starting point of a cutting cycle, when the numerically controlled (NC) lathe performs rough cutting. CONSTITUTION:When a lathe cuts a work, a tool 2 placed in a starting point A of cutting, after it cuts the work into a point B, performs cutting from the point B to a point C along a Z-axis and upward from the point C to a point D higher than the point A. Next, the tool 2, after it is quickly fed from the point D to a point E along the Z-axis, moves to the point B along an X-axis cutting the work into a point G from the point B. And next, the tool 2 performs cutting from the point G to a point H along the Z-axis and upward from the point H to the point D. Subsequently, the tool 2 successively cuts the next crest part almost similarly in orders 9-14, completing a desired cycle of rough cutting by quickly feeding the tool from a point N to a point O along the Z-axis while from the point O to the point A along the X-axis. |
