Abstract: Machine tool for machining of a rotating workpiece, comprising a tool drive, a workpiece drive for rotatably driving the workpiece, a tool rotationally driven by the tool drive in synchronization with the workpiece for producing a toothing on the workpiece, rotation transmitters for determining rotational condition of the tool and the workpiece, respectively, an electronic control for keeping the workpiece drive and the tool drive in synchronization by respectively associated ones of the rotation transmitters. A positioning motor is associated with one of the two drives for influencing the position of the phases of the two drives, and a sensor element provided in association with one of the two rotation transmitters is rotatably adjustable with respect to a stator of a corresponding one of the drives.

Abstract: The invention concerns a machine tool for the bovelling of a gear, in which two topfaces are simultaneously milled, with a rotationally driven workpiece carrier and two rotationally driven mounting spindles (13) which can be placed on the workpiece in an axial direction and whose rotationally driven angle of orientation towards the workpiece axis is adjustable in order to receive a milling machine at any one time, especially face milling cutters or single-tooth fly cutters. The workpiece is alternatively clocked or rotationally driven in a continuous manner and the mounting spindles (13) can be moved on a forwards or backwards axis in synchronization with the workpiece cycle or in synchronization with the continuous rotation of the workpiece on a fixed axis. The workpiece is moved forwards in the direction of the axis and each mounting spindle (13) is provided with a slide (12), which can be moved by an axial displacement drive (15).

Abstract: The invention relates to a feed device for machine tools with chuck arranged at the free end of a spindle, to which chuck the workpiece is fed axially through the inside of the spindle from the rear by means of compressed air from a compressed air nozzle through the spindle (1) into the chuck (2), having a tool station arranged in front of the head of the chuck and having a stop which comes in front of the head of the chuck (2) in synchronism with the machining for halting the movement of the individual workpiece (8). In order to increase the productivity, a brake member is arranged in the axial hollow (11) of the spindle (1) between the entrance end and the chuck (2).

Abstract: The invention relates to a machine for machining by cutting with workholder and tool holder rotating in positive drive with respect to each other, the axis (z) of which toolholder extending askew to the workholder axis of rotation (x), is swingable and lockable about an axis (y) which intersects the axis of rotation (x) of the workpiece and the axis (z) of the toolholder at right angles, the toolholder being displaceable in the direction of the axis of rotation (x) of the workholder and the axis of swing (y) of the toolholder.