Machining method for aviation flywheel

By using a 5,000-ton press for pre-forging, gas-shielded welding wire full penetration welding and tempering treatment, combined with a coupling mechanism and a buffer mechanism, the deformation problem caused by welding residual stress in the machining of large flywheels was solved, and the precise assembly and efficient simulation test of the flywheel were realized.

CN120839429APending Publication Date: 2025-10-28CHANGSHU QIANGSHENG ELECTRICITY EQUIP CO LTD
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Patent Information

Application Number
CN202511017651.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-23
Publication Date
2025-10-28

AI Technical Summary

Technical Problem

During the machining of large flywheels, residual welding stress is difficult to eliminate, leading to deformation and dimensional instability, which affects the flywheel's form and position tolerances and assembly accuracy, and consequently affects the reliability and accuracy of simulation tests of aircraft landing gear.

Method used

The drum wheel rim is prepared by pre-forging with a 5000-ton press and rolling with a 9-meter ring forging machine. Combined with full penetration welding with gas shielded welding wire and tempering treatment, residual welding stress is eliminated. The coaxiality of the rotating shaft and the connecting shaft and the accuracy of the dynamic balance test are ensured by the coupling mechanism and the buffer mechanism.

Benefits of technology

It effectively eliminated residual welding stress, stabilized the dimensional accuracy of the flywheel, ensured the concentricity and assembly accuracy of the flywheel and other components, and improved the reliability and accuracy of the simulation test of the aircraft take-off and landing device.

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Abstract

The invention relates to a machining method of an aviation flywheel, and relates to the technical field of aerospace manufacturing, the machining method comprises the following steps: S1, a 5000-ton press is used for pre-forging, and a 9-meter ring forging machine is used for rolling to prepare a drum wheel rim; a rim and a hub are preprocessed; s2, preheating to 250 + / -10 DEG C in a 9-meter well type electric furnace, performing full penetration welding by adopting a gas shield welding wire, and performing heat preservation and slow cooling after welding; performing UT and MT detection on each welding seam, heating to 500 DEG C at the speed of less than or equal to 50 DEG C / h, tempering, preserving heat for 8 hours, cooling to 250 DEG C or below along with the furnace, and discharging; in the machining process of the aviation flywheel, the temperature of the temperature measuring point is monitored in real time through the temperature measuring gun during welding, the structure is homogenized during tempering, welding residual stress is eliminated, deformation and cracking in the subsequent machining or using process are prevented, the size precision is stabilized, and the accuracy in the subsequent machining process is ensured.
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