Vacuum hot pressing repair method for titanium alloy lower earring part of an airplane

CN118989859BActive Publication Date: 2026-07-03WUHU STATE-OWNED FACTORY OF MACHINING

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: WUHU STATE-OWNED FACTORY OF MACHINING
Filing Date: 2024-08-01
Publication Date: 2026-07-03

AI Technical Summary

Technical Problem

In the existing technology, the repair of damage to aircraft titanium alloy lower earring parts has problems such as low strength, easy oxidation, large deformation, and high scrap rate. In particular, the deformation after wear on the inner side of the earring affects the stable flight of the aircraft.

Method used

The vacuum hot pressing repair method includes mechanical grinding, tapered bevel processing, vacuum hot pressing equipment repair, and non-destructive testing. The specific steps are: mechanical grinding of the damaged part, tapered bevel processing, vacuum hot pressing repair, and non-destructive testing. The repair is carried out by applying pressure at 800℃-1100℃ using vacuum hot pressing equipment.

Benefits of technology

It improves the mechanical properties of the aircraft's lower ear loop, ensuring the aircraft's reliability, reducing costs, and achieving high economic and quality benefits.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN118989859B_ABST

Patent Text Reader

Abstract

This invention relates to the field of remanufacturing technology, specifically to a vacuum hot-press repair method for aircraft titanium alloy lower earring parts, comprising the following steps: S1, based on the damage condition, firstly, mechanically grind away the deformed and worn parts around the titanium alloy lower earring lug, then process the titanium alloy lower earring lug into a tapered bevel from the outside to the inside; S2, use titanium alloy material of the same or similar type as the titanium alloy lower earring to process a blank that matches the bevel shape of the titanium alloy lower earring lug; S3, insert the cylindrical section of the blank into the large end face of the bevel of the titanium alloy lower earring lug and press it tightly, then place it in a vacuum hot-pressing device, fix it with a clamp, and perform vacuum hot-press repair; S4, after vacuum hot-press repair, cool it, release the pressure after cooling, and remove the repaired titanium alloy lower earring for non-destructive testing. This invention solves the problems of low strength, easy oxidation, large deformation, and high scrap rate that exist when repairing damage to lower earring products using conventional methods.

Need to check novelty before this filing date? Find Prior Art