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US 4,087,890 AGranted
Compound lathe
AssigneeCitizen Watch Co., Ltd.
InventorsShinichi Ishizuka, Kenji Sugimoto
Life of this patent
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AssigneeCitizen Watch Co., Ltd.
InventorsShinichi Ishizuka, Kenji Sugimoto
Estimating the term…
A compound lathe in which a headstock is horizontally movable along a spindle axis to provide longitudinal feeding of a workpiece mounted for rotation with the spindle and a saddle carrying a turret is vertically movable to provide transverse feeding. The saddle is slidably disposed on vertical guideways which is formed on a column mounted on a bed at the back of the headstock rearwardly of cutting areas of the workpiece and which vertically extends in a plane parallel to the axis of the spindle. The turret supports tools for turning, milling, drilling and other operations. Numerically controlled servo motors preferably position the headstock and saddle. A secondary workpiece gripping means is provided to grip the end of the workpiece opposite the headstock and is releasably connected to the headstock for movement therewith. The gripping means allows accurate secondary machining of the cut-off portion of a parted workpiece by the tools on the turret.
A lathe comprising a bed having horizontally disposed first guideways, a heastock horizontally slidable on said first guideways, a spindle rotatable in said headstock and having workpiece gripping means provided at a forward end portion of said spindle to grip a workpiece, a workpiece support detachable mounted on said bed in a coaxial relationship with said spindle at a position adjacent a forward end portion of said first guideways, a vertically extending column fixed to said bed at one adjacent side of said first guideways and at the same side as said headstock with respect to a plane perpendicular to the axis of said spindle and passing through a forward end of said workpiece support, second guideways provided on said column substantially vertically extending in a plane parallel to the axis of said spindle at a position adjacent a forward end portion of said first guideways, a saddle located at the same side as said headstock with respect to said plane passing through said forward end of said workpiece support and slidable on said second guideways to be vertically movable along a path overlying the slidable path of said headstock, a turret rotatably supported by said saddle and vertically movable therewith along a path which is perpendicular to the axis of said spindle, first driving means numerically controlled for horizontally feeding said headstock along said first guideways, second driving means numerically controlled for vertically moving said saddle along said second guideways and thereby moving said turret along said path which is perpendicular to the axis of said spindle, third driving means for rotating said spindle, and indexing means for rotating said turret to an indexed position, said turret including a hollow shaft horizontally extending through said saddle and drivingly connected to said indexing means for rotating said turret, a rotatable shaft extending through said hollow shaft, a plurality of tool gripping means mounted on said turret and drivably connected to said rotatable shaft, a drive train connected between said rotatable shaft and said third driving means to drive at least one of said tool gripping means, first coupling means disposed between said third driving means and said spindle, second coupling means disposed between said third driving means and said rotatable shaft, and said indexing means including a horizontally extending shaft having an axis parallel to said hollow shaft and rotatably supported by said saddle, gear means drivably connecting said horizontally extending shaft to said hollow shaft, and a motor mounted on said saddle and connected to said horizontally extending shaft to rotate said turret for indexing.
A lathe comprising a bed having horizontally disposed first guideways, a headstock horizontally slidable on said first guideways, a spindle rotatable in said headstock and having workpiece gripping means provided at a forward end portion of said spindle to grip a workpiece, a workpiece support detachably mounted on said bed in a coaxial relationship with said spindle at a position adjacent a forward end portion of said first guideways, a vertically extending column fixed to said bed at one adjacent side of said first guideways at the same side as said headstock with respect to a plane perpendicular to the axis of said spindle and passing through said forward end of said workpiece support, second guideways provided on said column substantially vertically extending in a plane parallel to the axis of said spindle at a position adjacent a forward end portion of said first guideways, a saddle located at the same side as said headstock with respect to said plane passing through said forward end of said workpiece support and slidable on said second guidways to be vertically movable along a path overlying the slidable path of said headstock, a turret rotatably supported by said saddle and vertically movable therewith along a path which is perpendicular to the axis of said spindle, said turret including rotatable tool gripping means, a hollow shaft extending through said saddle and connected to said turret, a rotatable shaft horizontally extending through said hollow shaft and operatively connected to said rotatable tool gripping means to rotate the same, indexing means drivingly connected to said hollow shaft for rotating said turret to an indexed position, and a source of driving power operatively connected to said spindle and said rotatable shaft to provide a driving power thereto, said indexing means including a horizontally extending shaft having an axis parallel to said hollow shaft and rotatably supported by said saddle, gear means drivably connecting said horizontally extending shaft to said hollow shaft, and a motor mounted on said saddle and connected to said horizontally extending shaft to rotate said turret for indexing.
A lathe comprising a bed having horizontally disposed first guideways, a headstock horizontally slidable on said first guideways, a spindle rotatable in said headstock and having workpiece gripping means provided at a forward end portion of said spindle to grip a workpiece, a workpiece support detachably mounted on said bed in a coaxial relationship with said spindle at a position adjacent a forward end portion of said first guideways, a vertically exending column fixed to said bed at one ajacent side of said first guideways at the same side as said headstock with respect to a plane perpendicular to the axis of said spindle and passing through a forward end of said workpiece support, second guideways provided on said column substantially vertically extending in a plane parallel to the axis of said spindle adjacent said forward end portion of said first guideways, a saddle located at the same side as said headstock with respect to said plane passing through said forward end of said workpiece support and slidable on said second guideways to be vertically movable along a path overlying the slidable path of said headstock, and a turret rotatably supported by said saddle and vertically movable therewith, said turret including rotatable tool gripping means, a hollow shaft extending through said saddle and connected to said turret, and a rotatable shaft extending through said hollow shaft and operatively connected to said tool gripping means.
A lathe comprising a bed having horizontally disposed first guideways, a headstock horizontally slidable on said first guideways, a spindle rotatable on said headstock and having workpiece gripping means provided at a forward end of said spindle to grip a workpiece, a workpiece support detachably mounted on said bed in coaxial relationship with said spindle at a position adjacent a forward end portion of said first guideways, a vertically extending column fixed to said bed at one adjacent side of said first guideways at the same side as said headstock with respect to a plane perpendicular to the axis of said spindle and passing through a forward end of said workpiece support, second guideways provided on a front face of said column and substantially vertically extending in a plane parallel to the axis of said spindle, a saddle located at the same side as said headstock with respect to said plane passing through said forward end of said workpiece support and slidable on said second guideways to be vertically movable along a path overlying the slidable path of said headstock, a turret rotatably supported by said saddle and vertically movable therewith, secondary workpiece gripping means opposedly facing said workpiece gripping means of said spindle, and means for releasably connecting said secondary workpiece gripping means to said headstock, said turret including rotatable tool gripping means, a hollow shaft extending through said saddle and connected to said turret, and a rotatable shaft extending through said hollow shaft and operatively connected to said tool gripping means.
A lathe comprising a bed having a horizontally disposed first guideways, a headstock horizontally slidable on said first guideways, a workpiece gripping spindle rotatable in said headstock, a vertically extending column fixed to said bed at one adjacent side of said first guideways at the same side as said headstock with respect to a plane perpendicular to the axis of said spindle and passing through a forward end portion of said bed, second guideways provided on said column substantially vertically extending in a plane parallel to the axis of said spindle at a position adjacent a forward end portion of said first guideways, a saddle located at the same side as said headstock with respect to said plane passing through said forward end of said bed and slidable on said second guideways to be vertically movable along a path overlying the slidable path of said headstock, a turret rotatable supported by said saddle and vertically movable therewith, said turret comprising rotatable tool gripping means, rotatable shaft means extending through said saddle to said turret and operatively connected to said tool gripping means, said rotatable shaft means being rotatable about an axis parallel to the axis of rotation of said spindle, a drive motor having its drive shaft axis parallel to the axes of said rotatable shaft means and said spindle, and drive means drivingly and selectively interconnecting said motor drive shaft with said rotatable shaft means and said spindle.
Dependencies are inferred from the claim text.