Method and apparatus for the production of turned workpieces on multi-station machine tools

A multistation turret machine for the production of machined workpieces from rod stock, comprises a turntable having an axis and being indexable about this axis between a plurality of stations circumferentially displaced about said turntable and including a loading station and a plurality of working stations;

• a plurality of clamping devices mounted circumferentially spaced from each other on said turntable, one for each station, and respectively aligned therewith during each indexing of said turntable;
• means cooperating with the clamping device which during indexing of the turntable is at said loading station for opening and closing said clamping device;
• means for feeding rod stock into the clamping device at said loading station while the clamping device at said loading station is open;
• severing means at the loading station for severing a rod section from said rod stock, while the clamping device at said loading station is closed, so that a machining length protrudes radially outwardly from said clamping device at said loading station;
• a plurality of radially inwardly directed guide means on said turntable, one for each of said clamping devices, for guiding the severed rod section;
• a plurality of machining units respectively arranged at said work stations for machining the machining length protruding outwardly from the respective clamping device, said machining units including an additional severing device for severing a machined workpiece from said rod section, said additional severing device being located at a station preceding said loading station;
• and means at one of said stations following said station provided with said additional severing device for moving the remainder of said rod section in radially outward direction so that a further machining length protrudes again from the clamping device of said following station.