Patent ID: 9227245
Filing Date: 2016-01-05
CPC Classification: B23B,Y10T

Claim Text:
1. A lathe machine comprising: a machine bed; a headstock mounted fixedly on a front part of said machine bed and having a spindle which defines a spindle axis, and which is configured for holding a workpiece; a tailstock unit including a bottom seat which is mounted on a rear part of said machine bed and movable in a longitudinal direction relative to said headstock, and which has a first front end wall that confronts said headstock, and a first leftwardly facing wall that extends in the longitudinal direction, a tail stock mount which is mounted on said bottom seat and movable in a transverse direction relative to said bottom seat, and which has a second front end wall that confronts said headstock, and a second leftwardly facing wall that extends in the longitudinal direction, a centering mandrel which is mounted on said tailstock mount, and which defines a centerline, and a drilling tool holder which is mounted on said tailstock mount, and which defines a drilling line, said drilling tool holder being juxtaposed to said centering mandrel in the transverse direction such that, by means of displacement of said tailstock mount in the transverse direction, a selected one of the centerline and the drilling line is in line with the spindle axis; a turret unit including a saddle which is mounted on said rear part of said machine bed and movable in the longitudinal direction relative to said headstock, a turret mount which is mounted on said saddle and movable in the transverse direction relative to said saddle, and which has a mount front that confronts said second leftwardly facing wall in the transverse direction, and a turret which is mounted on said turret mount; a first coupler unit disposed to releasably couple said saddle with said bottom seat so as to permit said bottom seat to be moved with said saddle in the longitudinal direction; a second coupler unit disposed to releasably couple said mount front with said second leftwardly facing wall so as to permit said tailstock mount to be moved with said turret mount in the transverse direction; and a positioning unit including a blocking member which is disposed on and movable relative to said first front end wall of said bottom seat in an upright direction that is transverse to both the longitudinal and transverse directions, and which has a rightward-facing inclined surface, and an abutment member which is disposed to be movable with said second front end wall of said tailstock mount in the transverse direction, and which has a leftward-facing inclined surface that is configured to matingly abut against said rightward-facing inclined surface of said blocking member so as to permit the centerline to be kept in line with the spindle axis.