Automatic precision lathe
AssigneeTsugami Corporation
InventorHidetsugu Wakatsuki
Life of this patent
Estimating the term…
Abstract
An automatic precision lathe is provided with a rotating main spindle movable in its axial directions, a slide movable in directions perpendicular to the axial directions of the main spindle, and a first subspindle and a second subspindle provided on the surface of the slide which faces the main spindle. The first and the second spindle are moved together with the slide to be alternately aligned with the main spindle to held the tip portion and the largest intermediate portion of the workpiece, respectively. The automatic precision lathe machines a workpiece having an intermediate portion with the largest diameter very accurately at a high rotational speed and at a large feed.
Claims8
An automatic precision lathe comprising:
- a bed;
- a main spindle having an axis and movable in two opposed axial directions thereof, for holding a long workpiece having a tip portion, a rear end portion and an intermediate portion between said tip portion and said rear end portion, said intermediate portion having a larger diameter than said tip portion and said rear end portion after said tip portion, said rear end poriton and said intermediate portion have been machined;
- first driving means for rotating said main spindle;
- second driving means for moving said main spindle in said axial directions;
- a cross slide movable in two opposed crosswise directions perpendicular to said axial directions of said main spindle, said cross slide having a surface facing said main spindle;
- third driving means for moving said cross slide in said crosswise directions;
- a first subspindle and a second subspindle having axes parallel with one another and parallel with the axis of said main spindle, said first subspindle and said second subspindle projecting from said surface of said cross slide and movable together with said cross slide in said crosswise directions so as to be alternately axially aligned with said main spindle;
- a first chuck provided on said first subspindle, for holding said tip portion of said workpiece, when said first subspindle is axially aligned with said main spindle and the intermediate portion of said workpiece is being worked;
- and
- a second chuck provided on said second subspindle, for holding said intermediate portion of said workpiece, when said second subspindle is axially aligned with said main spindle and the rear end portion of said workpiece is being worked.
Dependencies are inferred from the claim text.