On-machine ultrasonic thickness measurement and compensation of thin-walled parts machining on a CNC lathe

摘要

Aero-engine casing manufacturing requires considerable processing accuracy. In the aero casing turning process, the entire profile needs to be machined in one process to ensure the surface smoothness and control the remained wall thickness. However, the wall thickness error will be affected by tool wear and workpiece deformation in turning. This paper proposed a non-contact ultrasonic measurement system to measure the wall thickness and compensate the wall thickness error. The wall thickness of the aero casing is measured on the lathe after each turning process and compensated in the next path. Experiments validate the effectiveness of the developed method.