Patent ID: 6073323
Filing Date: 2000-06-13
Classification: B23B,Y10T

Abstract:
A tool spindle fixing device for composite machine tools in which a rotating-tool process is performed by one of driving a tool spindle in rotation with a rotating tool fitted to the tool spindle rotatably supported to a tool headstock and by driving a workpiece into turning with the tool spindle fixed to the tool headstock and with a turning tool fitted to the tool spindle, with comprises:a fixed-side coupling having a plurality of engaging teeth, said rotating side coupling being fixed to the tool headstock;a rotating-side coupling having a plurality of engaging teeth, said rotating side coupling being fixed to the tool spindle so that said rotating-side coupling is placed within the fixed-side coupling and is coaxial with the fixed-side coupling;a connection coupling having a plurality of engaging teeth, said connection coupling including a device for advancing said connection coupling towards and retracting said connection coupling away from the fixed- and rotating-side couplings, wherein the engaging teeth of the connection coupling are engaged or disengaged with the engaging teeth of said fixed- and rotating-side couplings, by which the tool spindle is fixed or unfixed to the tool headstock; anda positioning mechanism for pressing, in the turning process, a counter-tool-side end face of the tool spindle by a pressing member so that the tool spindle is positioned axially, and for withdrawing, in the rotating tool process, the pressing member so that the pressing member is separated from the end face.