Vertical honeycomb splicing interface water-spraying penetration type ultrasonic detection method

Abstract

The invention discloses a vertical honeycomb splicing interface water-spraying penetration type ultrasonic detection method. The vertical honeycomb splicing interface water-spraying penetration type ultrasonic detection method comprises the following steps that a multilayer honeycomb structure is vertically spliced; a layer of detachable skin is paved and pasted on each of the upper surface and the lower surface of the obtained multilayer honeycomb structure; first curing treatment is conducted on the multilayer honeycomb structure paved with the detachable skin; water-spraying penetration type ultrasonic C scanning detection is conducted on the multilayer honeycomb structure subjected to primary curing, and whether all honeycomb splicing interfaces are debonded or not is detected; if allthe honeycomb splicing interfaces do not have the debonding defect, the detachable skins on the upper surface and the lower surface of the multilayer honeycomb structure are torn off; and surface skins are pasted to the upper surface and the lower surface of the multilayer honeycomb structure, secondary curing is conducted on the multilayer honeycomb structure pasted with the surface skins, and vertically-spliced multilayer honeycomb structure parts are obtained. According to the vertical honeycomb splicing interface water-spraying penetration type ultrasonic detection method, the quality of the vertically-spliced multilayer honeycomb sandwich structure part can be guaranteed, the scrap risk of the multilayer honeycomb sandwich structure part is reduced, and the production cost is saved advantageously.

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...

AI Technical Summary

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

Images