In order to meet the nuclear industry's requirements for post-processing of spent fuel cladding assemblies, the design of the spent fuel cladding assembly inversion mechanism was completed through the analysis of the design and research of the inversion mechanism at home and abroad. In order to ensure the machining accuracy of the system, the accuracy of the hydraulic turning mechanism is analyzed based on the mathematical model and finite element simulation software. The analysis shows that the thermal error caused by the heat fluctuation caus...