Abstract: A workpiece holding system for correctly locating disk-shaped workpieces in a work area of a machine tool, in particular for machining rotor disks of a gas turbine engine, includes a base plate (6) firmly attached to the machine tool (1) with vertically and radially adjustable clamping elements (7) for restraining the workpiece on an outer circumference in a correct position, as well as a plurality of differently dimensioned centering elements (12) and supporting elements (17), each adapted to a particular shape and size of the workpiece (2) to be machined and to the respective processing step, these centering (12) and supporting elements (17) being exchangeable and attachable to the base plate/machine tool by quick fasteners.

Abstract: On a numerically controlled machine tool a sub-program is integrated into the given program for controlling the machine tool by which a periodic change of at least one cutting tool parameter is effected in one processing cycle, or also in several processing cycles, or in certain length and diameter zones of the workpiece characterized by tool vibrations and leading to inferior workpiece quality. By way of the periodic cutting parameter change, self-excited tool vibrations are avoided in these sensitive machining areas, thereby enabling tool wear to be reduced and workpiece quality improved. Furthermore, this intervention into the machining program is documentable and identically reproducible for each workpiece—independently of the expertise and personal judgement of the operator.

Abstract: A workpiece holding system for correctly locating disk-shaped workpieces in a work area of a machine tool, in particular for machining rotor disks of a gas turbine engine, includes a base plate (6) firmly attached to the machine tool (1) with vertically and radially adjustable clamping elements (7) for restraining the workpiece on an outer circumference in a correct position, as well as a plurality of differently dimensioned centering elements (12) and supporting elements (17), each adapted to a particular shape and size of the workpiece (2) to be machined and to the respective processing step, these centering (12) and supporting elements (17) being exchangeable and attachable to the base plate/machine tool by quick fasteners.