Process method for replacement and repair of iron clad of main blade made of composite material

Abstract

The invention belongs to the technique of repair of aircrafts, and relates to a process method for replacement and repair of an iron clad of a main blade made of a composite material. The surface of the blade is marked in a spanwise position where the iron clade needs to be replaced, and the iron clad is separated from the main blade; an original resin system is selected and used, dry glass cloth is dipped in glue with 45% glue content, the glass cloth after glue dipping is cut according to the size of the glass cloth, and the layers of the laid glass cloth are one more than those of the stripped glass cloth; a tooling is fixed by adhesive tape and vacuumized, and a upper wing surface and a lower wing surface of the iron clad are pressurized; finally, the method that the blade is fully packaged with a vacuum bag is adopted, so that the iron clad of the blade can be replaced and repaired. The repair quality of the iron clad of the main blade is improved after ungluing, the theoretical appearance and the adhesion strength of the blade are guaranteed, the blade scrap rate caused by faults of the iron clade is effectively reduced, the repair efficiency and the repair success rate of the blade are increased, and the repair quality and the product stability are guaranteed.

Description

technical field [0001] The invention belongs to the aircraft repair technology, and relates to a process method for replacing and repairing iron-clad main blades of composite materials. Background technique [0002] The leading edge of the composite material main blade of the helicopter adopts an iron-clad protective structure. When there are faults such as the iron-clad debonding, debonding, or damage to the iron-clad due to impact of foreign objects, the leading-edge iron-clad needs to be replaced. At present, when the iron cladding needs to be replaced for the main propeller, the vacuum bag method is used to directly bond and pressurize the iron cladding. The direct pressurization method of the vacuum bag has no restrictions on the shape of the iron-clad, so the shape of the blade cannot be guaranteed, and it is easy to cause the condition that the repaired iron-clad does not match the theoretical state, and the pressure provided by the vacuum bag is limited, which is dif...

AI Technical Summary

Problems solved by technology

The direct pressurization method of the vacuum bag has no restrictions on the shape of the iron-clad, so the shape of the blade cannot be guaranteed, and it is easy to cause the condition that the repaired iron-clad does not match the theoretical state, and the pressure provided by the vacuum bag is limited, which is different from when the blade is first formed. The pressure is very different, and the bonding strength will also decrease, which will affect the life of the blade

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