Turbine blade tip finishing apparatus

摘要

An apparatus for finishing the tips of turbine blades and the like is provided. The invention is especially useful on worn turbine blades which have been repaired by adding weld material. An abrasive first removes excess weld material with a reciprocating motion and constant force. A sensor indicates when the abrasive is a predetermined distance above the intended finish contour surface and thereafter there is a predetermined fixed time in which the material removal continues. During the predetermined time period the motion of the abrasive is converted to one along a guided path corresponding to the path of the finished surface contour by apparatus such as a cam and cam follower. Thus, the time of refinishing is reduced and labor productivity is increased.