Adaptive high-speed milling

Adaptive high-speed milling

When high-pressure turbine blades are repaired, the worn blade tips are frequently removed and restored by buildup welding. Adaptive high-speed milling is used to remove the excess welding filler in the process of reproducing the original blade tip contour after welding.

Since the damage patterns on blade tips and the tip contours to be restored differ greatly depending on the stresses occurring in operation and the blade type involved, recontouring previously has had to be performed manually, a process which was costly and time-consuming. An integrated tactile measuring system now permits the blade tips to be machined to their final contour by adaptive milling in a fully automated and flexible process.

With the new process, MTU Maintenance Hannover can now offer complete blade tip repairs comprising laser powder cladding, adaptive high-speed milling and electro-discharge machining for a wide range of blade types.