System and method for inspecting fiber placement during manufacture of fiber reinforced composite parts
An inspection method and enhanced technology, applied in image enhancement, instrumentation, image data processing, etc., can solve problems such as weakening of composite parts
Active Publication Date: 2020-04-17
THE BOEING CO
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Problems solved by technology
Interlaminar voids are delamination defects that can lead to weakening of cured composite parts
Method used
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[0146] Clause 1. An inspection method, said inspection method comprising:
[0147] projecting 102 a light pattern onto the inspection area on the form 30;
[0148] acquiring 104 a baseline 3D profile of the forming part by imaging the light pattern on the forming part;
[0149] laying 106 an uncured fiber sheet onto the form in the inspection area;
[0150] projecting 108 the light pattern onto the uncured fiber sheet on the form;
[0151] acquiring 110 a test 3D profile of the uncured fiber sheet on the form by imaging the light pattern on the uncured fiber sheet on the form; and
[0152] A thickness difference between the test 3D profile and the baseline 3D profile is calculated 112 .
[0153] Clause 2. The inspection method of clause 1, wherein the step of obtaining 104 said baseline 3D profile and obtaining 110 said test 3D profile comprises performing digital image correlation.
[0154] Clause 3. The inspection method according to any one of clauses 1-2, further compr...
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Abstract
The present invention relates to a system and method for inspecting fiber placement during manufacture of fiber reinforced composite parts. The disclosed systems and methods relate to inspecting an uncured fiber reinforced composite part by non-contact 3D measurement of the part using a 3D digital image correlated to patterned illumination. The system includes a light projector configured to project a light pattern onto the form, a digital camera configured to image the light pattern, and may include and / or be associated with an AFP configured to deposit uncured composite material on the form. machine. The method includes: projecting a light pattern onto the form; acquiring a baseline 3D profile of the form by imaging the light pattern on the form; laying an uncured fiber sheet onto the form; projecting the light pattern onto the uncured on the fiber sheet; the test 3D profile of the fiber sheet is acquired by imaging the light pattern on the uncured fiber sheet and the difference in thickness between the test 3D profile and the baseline 3D profile is calculated.
Description
technical field [0001] The present disclosure relates to systems and methods for inspecting fiber placement during manufacture of fiber reinforced composite components. Background technique [0002] Automated fiber placement is a technology for manufacturing fiber-reinforced composite parts. The technology uses automated fiber placement (AFP) machines (also known as advanced fiber placement machines) that precisely place and layer uncured sliver fiber tapes onto molds and / or mandrels . AFP machines are commonly used to manufacture large complex shaped structures such as housings, air turbine blades, pressure vessels, and other industrial products. [0003] Uncured fiber tapes generally comprise carbon fibers pre-impregnated with thermosetting and / or thermoplastic materials (pre-impregnated carbon fiber tapes). The tape can take the form of a tow, which is an untwisted bundle of continuous filaments, and can be thin and narrow (common thicknesses range from about 0.005" (0...
Claims
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IPC IPC(8): B29C70/54B29C70/38
CPCB29C70/382B29C70/54G06T7/001B29C2037/906G06T2207/10028B32B5/026B32B5/26B32B2260/021B32B2260/046B32B2262/0261B32B2262/101B32B2262/106G06T7/521G01B11/06
Inventor J·A·葛罗尼柯K·E·麦卡瑞K·M·尼尔森C·A·克莱默
Owner THE BOEING CO