Online detection method for holes co-axiality of aero-engine

In recent years, the requirement for the assembly performance of aero-engine is getting higher in the aviation field. As the key indicator which can affect engine performance, the demand of detection accuracy of rotor bearing holes' coaxial error is increasing. In the engine's assembly process, the traditional manual mechanical detection cannot measure the assembled holes' co-axiality directly, and must be carried out by the fixed tools after the trial assembly. This results in the long assembly time, low productivity, and low detection accuracy. An online detection method which can better ensure the products' assembly quality must be proposed. Based on the analysis of the related research status of co-axiality detection at home and abroad, combined with the laser alignment technology and the axle hole centering measurement technology, an online measurement method based on the laser alignment is proposed, and a co-axiality detection system of the turbofan engine for specific models is introduced, whose centering error is less than 4μm. Besides, a universal co-axiality detection method of the engine rotor shaft hole is obtained, which could optimize the assembly process and improve the assembly efficiency.