Thermal spraying remanufacturing method for damaged end surface of aero-engine accessory gearbox housing

Abstract

The invention discloses a thermal spraying remanufacturing method for a damaged end surface of an aero-engine accessory gearbox housing. The technological process includes the steps as follows: boring partially the damaged part, thermal spraying to repair the damaged part, and boring the remaining coating. The method is characterized in that during the process of thermal spraying to repair the damaged part, the bottom transitional layer adopts Ni-Al alloy material; the Ni-Al alloy consists of 95wt% of Ni and 15wt% of Al; the Ni-Al alloy wire has the spraying parameters as follows: spraying voltage is from 30 to 35V, the spraying current is from 150 to 180A, the spraying distance is 100mm, and the atomizing air pressure is from 0.35 to 0.45Mpa; and the aluminum wire spraying parameters are as follows: the spraying voltage is from 30 to 35V, the spraying current is from 100 to 120A, the spraying distance is from 130 to 150mm, and the atomizing air pressure is from 0.5 to 0.6Mpa. The method is simple to operate, has excellent effect, has the effective function of fault removal as the repaired accessory can meet the technical requirements of the engine use, improves the safety and reliability of the engine use, and reduces the maintenance cost of the engine at the same time.

Description

technical field [0001] The invention relates to the field of engine repair, and specifically provides a thermal spraying remanufacturing technology for a damaged end surface of an aero-engine accessory case casing. Background technique [0002] The aero-engine accessory casing is an important part of the engine transmission system and is installed above the engine intermediate casing to fix and drive the engine fuel accessories. [0003] Because fuel system failures are more common when the engine is used in the field, it is necessary to frequently disassemble the above accessories for troubleshooting. In view of the harsh working environment in the field and the limitations of troubleshooting, many shell end faces were damaged due to improper operation and repeated disassembly and assembly of accessories. Multiple receiver shells scrapped. Due to the complex structure of the accessory receiver, it cannot be replaced directly. At the same time, for the repair of the fault...

AI Technical Summary

Problems solved by technology

In view of the harsh working environment in the field and the limitations of troubleshooting, many shell end faces were damaged due to improper operation and repeated disassembly and assembly of accessories. Multi-cassette case scrapped

Due to the complex structure of the accessory casing, it cannot be directly replaced

At the same time, for the repair of the fault surface, there is no damage repair technology of similar materials, which greatly affects the normal use of the engine

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