| 摘要 |
A CNC lathe with double-speed shifting feature in spindle axis comprises a frame, a screw rod pivotally disposed along a lengthwise spindle axis of the frame, a worktable assembly and a tool holder assembly; characterized in that the screw rod includes a positive thread section and a counter thread section for engaging two nuts respectively secured on the worktable assembly and the tool holder assembly; thereby when the screw rod is rotated by a servomotor, the tool holder assembly and worktable assembly are simultaneously shifted in opposite directions along the spindle axis for obtaining a relatively shifting speed at the double of conventional one, so that the non-cutting operation time of a CNC lathe is greatly reduced, and so that the overall machining speed and efficiency are improved.
|
