Damage repairing method for balancing lever of lubricating oil accessory of aero-engine

In order to solve the technical problems that the hardness of a carburized layer of a lubricating oil accessory balance lever is not enough and the lubricating oil accessory balance lever is easy to wear and no effective repair means exists in China at present, the invention provides a damage repair method for an aero-engine lubricating oil accessory. According to the method, firstly, the special flat grinding tool integrating clamping and measuring basis providing is designed to clamp the balance lever, it can be guaranteed that the to-be-repaired face of the balance lever is flat during machining, then spraying repair is conducted on the balance lever by setting reasonable thermal spraying process parameters, the profile size of the working face of the balance lever is recovered, and the machining precision of the balance lever is improved. The thickness of the sprayed WC coating can meet the technical requirements, the coating metallographic structure is uniform and free of cracks and unmelted particles, t