Skin damage repair method for aluminum alloy skin foam sandwich part

Abstract

The invention belongs to the technical field of aerial foam sandwich part manufacturing and relates to a skin damage off-site repair method for an aluminum alloy skin foam sandwich part.The method is mainly used for maintaining skin damage faults of the aluminum alloy skin foam sandwich part.According to a prepared curing adhesive, the weight ratio of E-51 epoxy resin, quartz powder, m-xylylenediamine and 201 polysulfide rubber in the curing adhesive is 100:20:22:50.Besides, according to the shape of a damage range, a set of high-strength glass cloth patches identical in shape and different in size are cut, and the edge distance of the patches adjacent in size in each set is 25 mm.The patches are laid sequentially in the damaged position from small to large, the curing adhesive is evenly coated between the patches, the number of the patches is determined by the thickness of aluminum alloy skin, and it is guaranteed that a repaired damage area is flush with surrounding skin.

Description

technical field [0001] The invention belongs to the technical field of manufacturing aviation foam sandwich parts, and relates to an out-of-factory maintenance method suitable for skin damage of aluminum alloy skin foam sandwich parts. Background technique [0002] A certain part used in the installation of a certain type of machine in Yun 8 is an aluminum alloy skin foam sandwich structure. For the specific structure, see figure 1 . Due to the impact of the flight environment and conditions, during the flight process in various aircraft factories for many years, foreign objects, local water ingress, foam expansion and contraction due to temperature differences, etc. have often caused local damage to the skin, such as bulges, breakage, and delamination. , affecting the flight use of the aircraft, if it is replaced with new parts, it is basically unfeasible due to the influence of long cycle, high cost, and difficulty in installation outside the factory. In view of this pro...

AI Technical Summary

Problems solved by technology

Due to the impact of the flight environment and conditions, during the flight in various aircraft factories for many years, foreign objects, local water ingress, temperature difference, foam expansion and contraction, etc. often caused partial damage to the skin, such as bulges, breakage, and delamination. , which affects the flight use of the aircraft. If new parts are installed, it is basically not feasible due to the influence of long cycle, high cost, and difficulty in installation outside the factory.

Images