Apparatus for working on turbine blade mounting grooves.

摘要

An apparatus for machining turbine blades (1) of a radial entry type to form in each blade a groove of a Christmas tree shape for mounting the blade on a turbine rotor including a main spindle (25), a rotary disk (30) supported on the main spindle, and a plurality of cutters (50) supported on the rotary disk (30) through a cutter holder (46) in positions forming an arc on the surface of the disk. The cutters (50) are located such that those of a configuration suitable for use in giving coarse finishes, those of a configurator suitable for giving middling finishes and those of a configuration suitable for giving final fine finishes are arranged successively in positions forming an arc on the disk. A blade (1) to be machined is supported in a position in which a groove thereof crosses paths of movement of the cutters as the disk is rotated. Thus the blade (1) can be machined to give fine finishes to the groove.