Patent ID: 7125312

Claim:
Grinding machine for blades of a turbine or a compressor rotor, comprising: a machine bench, supporting a rotor of several periods of blades rotating at high speed; a grinding wheel head including two grinding wheels for grinding which are rotatable into a grinding position for the grinding of blades of successive rotors; a shaping device associated with each grinding wheel for shaping of each grinding wheel, each shaping device including a respective shaping tool mounted on a supporting carriage for linear movement of the shaping tool with respect to the grinding wheel; an electronic control unit including a numerical control CNC to control the rotor, displacement of the grinding wheel head in an axial direction in a radial directions and an angular direction with respect to the rotor, and displacements of the shaping device; an optical system to measure the radius (R) of the blades the rotor period being rectified, which is connected to the bench of the machine; the grinding wheel head is supported on a rotary carriage and two linear carriages, which carry out the displacements of the head, calculated from geometric data relative to the two grinding wheels; wherein the optical system in cooperation with the control unit carries out a continuous detection of burrs on the blades during the grinding by means of measuring perturbations of the radius R, and each respective shaping tool carries out shaping of each respective grinding wheel during continuous detection of burrs by the optical system without stopping the grinding.