| 摘要 |
1. Machine tool comprising the essential elements of a conventional lathe, namely : - a rotary workpiece-holding lathe spindle (4) driven in rotation about a horizontal axis (l-l) by driving means (3) allowing its rapid rotation within the range of speeds normally used for lathes ; - a tool-carrier assembly (2) movable in translation horizontally with respect ot the spindle (4) along a longitudinal axis parallel to the axis (l-l) of the spindle and a transverse axis (ll-ll) at right angles to the axis to the spindle ; - tools (11) fixedly mounted on the tool-carrier assembly (2) ; - means (10) mounted on the tool-carrier assembly, for driving turning tools (7, 8) in rotation ; - the driving means for the spindle comprising at least one principal motor (31) allowing the rapid rotation of the spindle and electronic control means (33) allowing the speed of rotation of the motor and of the spindle to be controlled, then to stop it at specific successive angular position, characterized in that : - the workpiece-holding spindle (4) is mounted on a carriage (5) sliding on guideways (61) of the frame along a vertical axis (lll-lll), - the tools, stationary (11) and rotary (7, 8), are situated at different heights of the tool-carrier assembly (2) and at fixed positions with respect to the tool-carrier assembly (2). |
