Abstract:  During the machining of an aeroengine blade, the precision of traditional table was reduced after long-term wear, which was unable to match the requirement of aero-engine blade processing. Therefore, a non-standard grooved disc spring servo compensation mechanism was innovatively designed for the new type of two-stage helical gear transmission turntable, which used the variable stiffness and reduced load displacement curve characteristics of the non-standard slotted disc spring. The wear gap caused by long-term meshing of the gear pair was eliminated by this mechanism. Meanwhile the design of the non-standard slotted disc spring, which was the core component of the new mechanism, was systematically summarized. The method combining ANSYS analysis and experimental verification was used to verify the correctness of the design of the slotted disc spring servo compensation mechanism and the theoretical system of the non-standard slotted disc spring design. The research results show that 

the designed disc spring can be used as a compensation mechanism to realize real-time compensation of wear errors, achieve the purpose of improving the accuracy of the turntable, and meet the extremely high processing requirements of aero-engine blades.

Key words:  new type of machine tool turntable; non-standard slotted disc spring; follow-up compensation for wear error; modal analysis; declining load displacement characteristics