Penetrating ultrasonic testing method of vertical honeycomb splicing interface with water spray

Abstract

A vertical honeycomb splicing interface water spray penetrating ultrasonic detection method, comprising the following steps: vertically splicing multilayer honeycomb structures; paving a layer of peelable skin on the upper and lower surfaces of the obtained multilayer honeycomb structure; The multi-layer honeycomb structure that has been peeled off the skin is cured for the first time; the multi-layer honeycomb structure after the first curing is subjected to a water spray penetrating ultrasonic C-scan test to detect whether all the honeycomb splicing interfaces are debonded; if all the honeycomb splicing interfaces are If there is no debonding defect, the detachable skin on the upper and lower surfaces of the multi-layer honeycomb structure is torn off; the surface skin is pasted on the upper and lower surfaces of the multi-layer honeycomb structure, and the multi-layer honeycomb structure pasted with the surface skin is subjected to secondary curing , to obtain vertically spliced ​​multilayer honeycomb structure parts. The above-mentioned ultrasonic testing method of vertical honeycomb splicing interface water spray penetrating can ensure the quality of the vertically spliced ​​multilayer honeycomb sandwich structure parts, reduce the risk of scrapping the multilayer honeycomb sandwich structure parts, and help save production costs.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to a water-spraying penetrating ultrasonic testing method for a vertical honeycomb splicing interface. Background technique [0002] In recent years, due to the needs of the development of aerospace technology, composite materials have developed rapidly, and various advanced composite materials and complex structural forms are replacing traditional airframe structural materials. Ultrasonic testing is the most effective and convenient non-destructive testing method for composite material structural parts, especially for ultrasonic testing of composite honeycomb sandwich structures. Due to the particularity of the honeycomb structure, the testing method is mainly based on water spray Ultrasound C-scan detection mainly. [0003] Traditional composite honeycomb sandwich structures are mostly single-layer honeycomb sandwich structures. With the continuous emergence of ne...

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Problems solved by technology

[0004] Since the multi-layer honeycomb sandwich structure after one curing has no surface skin, the upper and lower honeycombs are directly exposed, and water spray penetration C-scanning cannot be performed. In the prior art, only the vertically spliced ​​multi-layer honeycomb after two curings is completed. Sandwich structure parts are inspected by water spray penetrating ultrasonic C-scan, and once defects are detected in multi-layer honeycomb sandwich structure parts, the parts can only be scrapped. The scrap rate of parts is high, which affects production costs

Therefore, the existing vertical honeycomb splicing interface water spray penetrating ultrasonic testing method cannot detect and monitor whether the honeycomb splicing interface after a solidification is debonded in advance, which makes the scrapping risk of multi-layer honeycomb sandwich structure parts high and affects production costs. technical issues

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