Patent ID: 9089913
Filing Date: 2015-07-28
Classification: B23C,B23F,Y10T

Abstract:
1. A machine tool for machining gear teeth into an inner side of an annular workpiece, the tool comprising: a substructure comprising a lateral surface having an upper side comprising a circular ring, a rotary bearing having two rings rotatable relative to each other, an annular machining table disposed on said rotary bearing and adapted to support at least one workpiece seated thereon, and a chassis for supporting a tool head, said chassis extending at least during machining, through the annular machining table, or through a central opening therein, from a bed or pedestal below the machining table, a plurality of exchangable machining rings, each adapted for a selected workpiece to be machined, with receptacles provided with fastening means on upper sides thereof, and an adaption ring fixed to an upper side of either one of an inner ring and an outer ring of said rotary bearing and supporting the machining ring, wherein concentric guiding means defined by an inner cone and an outer cone are provided, one of said inner and outer cones being provided on said adaption ring, and the other one of said inner and outer cones being provided on at least one of said plurality of exchangeable machining rings, and wherein at least one braking device with movable brake shoes for arresting the machining table is provided, the braking device being adapted to act on a radially outwardly projecting, peripheral collar of said adaption ring.