Patent ID: 7080433
Filing Date: 2006-07-25
Classification: B23Q,Y10T

Abstract:
1. A workpiece seat for the machining of bar-shaped workpieces by milling and turning operations, said workpiece seat comprising: an elongated housing; a spindle rotatably supported in the housing, said spindle having a working end; an electric direct drive for the spindle, said drive comprising a rotor fixed on the spindle and a stator fixed in the housing; a clamping means provided at the working end of the spindle, said clamping means being shaped and configured for fixing a bar-shaped workpiece in the spindle; a front-side spindle bearing arrangement; a connection unit provided at a rear part of the housing for energy supply; and a fixing means for fixing the spindle in the housing by contacting the working end of the spindle, said fixing means being formed as a compact part and arranged on the working end of the spindle before the front-side spindle bearing arrangement, the fixing means further comprising an annular elongated pressure chamber formed in the housing part, into which at least one pressure-oil channel terminates and which is limited in a radial inward direction by a deformable radial inner wall.