Patent ID: 6302006
Filing Date: 2001-10-16
Classification: B23B,Y10T

Abstract:
A machine spindle for mounting one of a tool and a workpiece, comprising:a rotationally-fixed spindle housing;a two-part, central spindle shaft having a first spindle-shaft part and a second spindle-shaft part;said first and second spindle-shaft parts being rotatable with respect to one another, being axially non-displaceable with respect to one another, and being disposed coaxially with respect to one another;said first spindle-shaft part having a mounting device for mounting one of a tool and a workpiece;said two-part, central spindle shaft having spindle ends, respectively formed by said first and second spindle-shaft parts, said two-part, central spindle shaft being mounted as a unit, at said spindle ends, in said rotationally-fixed spindle housing;an integrated, task-dependent clamping mechanism operatively associated with said first and second spindle-shaft parts, said integrated, task-dependent clamping mechanism being actuatable by rotating said first spindle-shaft part relative to said second spindle-shaft part;an angle-position-controlled spindle drive connected to said second spindle-shaft part;a ring coaxially enclosing said two-part, central spindle shaft;said ring being axially displaceable between two axial end positions and, in one of the axial end positions, said ring connecting said first and second spindle-shaft parts such that said two-part, central spindle shaft acts as said unit for a normal operation as a machine spindle and, in another one of the end positions, said ring connecting said first spindle-shaft part fixedly to said rotationally-fixed spindle housing, and said second spindle-shaft part being coupled exclusively to said integrated, task-dependent clamping mechanism; andsaid integrated, task-dependent clamping mechanism being actuatable for a clamping operation, via said angle-position-controlled spindle drive connected to said second spindle-shaft part.