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Method of determining moulded gasbag of tail rotor blade through CT detection

A technology of tail rotor blades and airbags is applied in the field of auxiliary inspection of helicopters, which can solve the problem of inability to determine the thickness of the leading edge of the skin, and achieve the effect of improving product safety and controlling product quality.

Inactive Publication Date: 2015-08-05
HARBIN
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, under the premise of not damaging the tail rotor blade, the current methods such as X-ray inspection, visual inspection and knock inspection cannot determine the thickness of the skin and leading edge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Preparation before inspection

[0015] Tooling preparation:

[0016] Check the effectiveness of the radiographic inspection clamping tooling (tooling drawing number: 384ZM5080098).

[0017] Check the integrity of the mold, clean the residual glue and other excess on the tooling, check the accurate positioning of the frame and flexible disassembly; scrub the tooling with acetone or methyl ethyl ketone to ensure that the surface of the tooling is smooth and free of grease.

[0018] Put the lower wing of the tail rotor blade to be inspected on the platform to be inspected, and place a soft foam sponge pad on the inspection platform to prevent the surface of the tail rotor blade from being scratched.

[0019] Specify the inspection mark on the airfoil section of the tail rotor blade as the starting record point for checking the tail rotor blade.

[0020] Tail rotor blade inspection

[0021] Put the tail rotor blade to be inspected into the clamp body, close the splint, a...

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Abstract

The invention belongs to the field of helicopter assistant detection and particularly relates to a method of determining a moulded gasbag of a tail rotor blade through CT detection. At present, on the premise of not destroying the tail rotor blade, methods of X-ray inspection, vision inspection and knocking inspection and the like cannot be used for determining the thickness of a skin and a leading edge, so that a method of nondestructive testing on the premise of not destroying the tail rotor blade is required. According to the method, through layering detection of leading edge of the tail rotor blade with CT, a CT cross section anatomy scanning image in all directions is obtained, thereby providing a simple and fine unique tool which can show all detains of an object and is used for observing layer-grade parts. During production, the method of CT to perform identification and inspection on the leading edge form of the tail rotor blade is a lossless inspection method which is effective of controlling product quality and increasing product safety.

Description

technical field [0001] The invention belongs to the field of auxiliary detection of helicopters, and in particular relates to a method for determining an airbag formed by a tail rotor blade through CT detection. Background technique [0002] The tail rotor blade is composed of three parts: flexible beam, sleeve and airfoil section. The core component of the tail rotor is the flexible beam, which connects the two tail rotor blades in reverse, fixes them to the hub, and forms the girder of the tail rotor blade airfoil section through it. [0003] In order to verify the quality consistency of batch production of tail rotor blades, the life test of batch production of tail rotor blades was carried out. Among them, a certain batch of test pieces failed prematurely when the test was performed 5,000 times, so that the subsequent delivery of the tail rotor blade was stopped, which affected the delivery of the test flight. [0004] Through inspection, analysis and elimination, espe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/02
Inventor 李鹏李富朴陈光王绍阳王研邓玉宝
Owner HARBIN
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