Method for processing the rotor of a turbine and device for implementing the method

摘要

The method involves inserting a program controlled milling fixture into a groove i.e. fir tree groove (13), with a milling tool (20), where the milling fixture has a milling tool positioning device for guiding the milling tool along the surface of the groove that is to be machined. Material from the groove is removed until the shape of the groove is changed, such that the groove is less susceptible to cracks compared to the unaltered shape of the groove. The groove is examined with a probe for identifying presence of cracks in the groove. An independent claim is also included for a device for subsequently machining a groove in a rotor of a turbine for accommodating a shovel.