Segmented Fuselage Preform Assembly for Faster Composite Layup
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Solution Overview
Problem
Current methods for fabricating large composite aircraft parts are time-consuming due to the need for extensive indexing and layup of preforms on a single mandrel, requiring substantial space and specialized machinery.
Innovation Solution
The implementation of an assembly-line system that subdivides layup and compaction operations across multiple stations, allowing a series of arcuate mandrel sections to be advanced through an assembly line for incremental fiber reinforcement and stringer preform placement, enabling continuous processing and increased throughput without specialized machinery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single AFP machine traverses the entire layup mandrel singularly, then manufacturing precision is maintained, but productivity is reduced
Solution Approach 1:
The patent divides the large layup mandrel into multiple smaller mandrel sections that can be processed independently by multiple AFP machines simultaneously. Each machine works on a specific section, maintaining precision while dramatically increasing overall production throughput by eliminating the sequential bottleneck of a single machine traversing the entire length.
Solution Approach 2:
The patent transitions from a single-dimensional sequential processing approach (one machine moving along the entire mandrel) to a multi-dimensional parallel processing approach (multiple machines working simultaneously on different sections). This dimensional change in the production system enables both precision maintenance and productivity improvement.
2Manufacturing precision
If a large layup mandrel is used for entire fuselage sections, then manufacturing precision is maintained, but the area occupied in the factory increases
Solution Approach 1:
The patent segments the large mandrel into smaller modular sections that can be processed independently. These smaller sections occupy less factory floor space and can be arranged more compactly, reducing the overall area required while maintaining the precision benefits of controlled layup environments.
Solution Approach 2:
The patent employs movable and reconfigurable mandrel sections that can be assembled and disassembled as needed. This dynamic approach allows the same equipment to handle different fuselage section sizes, optimizing space utilization compared to fixed large-scale mandrels that occupy permanent factory space.
3Manufacturing precision
If extensive indexing and layup operations are performed on a stationary mandrel, then manufacturing precision is achieved, but the duration of action increases
Solution Approach 1:
The patent divides the fabrication process into parallel segments, with multiple AFP machines simultaneously performing layup operations on different mandrel sections. This segmentation eliminates the sequential indexing delays inherent in single-machine processes, reducing total fabrication time while maintaining precision through controlled parallel operations.
Solution Approach 2:
The patent enables continuous parallel layup operations across multiple mandrel sections, eliminating idle time and indexing delays. While one section is being laid up, other sections are simultaneously processed, ensuring continuous productive action throughout the system and dramatically reducing overall fabrication duration.
Data Source
AI summary
Systems and methods are provided for fabricating a preform for a fuselage section of an aircraft. The method includes advancing a series of arcuate mandrel sections in a process direction through an assembly line, laying up fiber reinforced material onto the arcuate mandrel sections via layup stations, uniting the series of arcuate mandrel sections into a combined mandrel; and splicing the fiber reinforced material laid-up onto the arcuate mandrel sections.