Modular Composite Layup System for Contoured Structures
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Solution Overview
Problem
The challenge lies in efficiently fabricating one-piece contoured composite laminate structures in high production rate environments, where conventional methods are labor-intensive and time-consuming, and cannot handle materials like unidirectional prepreg tape effectively.
Innovation Solution
A modular system comprising a base, ply carrier control assembly, and a nosepiece that can adapt to tool profiles, allowing for automated formation and compaction of composite resin plies on a tool, with features like load cell feedback, position sensing, and compliance to conform to tool features, enabling efficient production of unique parts with common features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional manual fabrication methods are used, then flexibility in handling different materials and geometries is maintained, but labor intensity and production time increase significantly
Solution Approach 1:
The automated fabrication system is divided into modular components including a robot controller, ply carrier control assembly, and head section with nosepiece. Each module can be independently controlled and optimized, allowing high-speed automated operation while maintaining flexibility for different laminate configurations and material types.
Solution Approach 2:
The automated layup system is designed to handle multiple material types (unidirectional prepreg tape, woven fabrics, etc.) and various laminate configurations through programmable control. The same apparatus can fabricate different contoured structures by adjusting control parameters, eliminating the need for dedicated equipment for each material or geometry.
2Ease of manufacture
If one-piece contoured frame sections are fabricated using braided composites, then assembly complexity is reduced, but fabrication time and labor intensity increase
Solution Approach 1:
Multiple plies are pre-positioned on the ply carrier in the desired sequence and orientation before the forming operation begins. The ply carrier control assembly precisely controls the positioning and delivery of each ply to the nosepiece, allowing rapid sequential layup without manual intervention during the forming process.
Solution Approach 2:
The automated system maintains continuous operation during the layup process, with the robot controller coordinating the simultaneous or sequential actions of the ply carrier control assembly and nosepiece. This eliminates idle time and manual repositioning, enabling continuous fabrication of one-piece contoured structures.
3Productivity
If automated forming systems are implemented, then production efficiency increases, but system complexity and initial investment increase
Solution Approach 1:
The automated forming system is divided into modular components including a robot controller, ply carrier control assembly, and head section with nosepiece. Each module can be independently controlled and optimized, allowing high-speed automated operation while maintaining flexibility for different laminate configurations and material types.
Solution Approach 2:
The system incorporates sensors and control algorithms that automatically adjust forming parameters based on real-time feedback from the process. The robot controller monitors ply placement accuracy and nosepiece position, making automatic corrections without external intervention, thereby simplifying operation despite the system's complexity.
4Strength
If unidirectional prepreg tape is used for fabrication, then laminate performance is improved, but conventional manual methods cannot effectively handle this material form
Solution Approach 1:
The system replaces manual mechanical handling with an automated robot-controlled mechanism. The ply carrier control assembly uses precision motors and sensors to position and deliver unidirectional prepreg tape from the roll through the nosepiece, enabling effective handling of this difficult material form through automated mechanical systems.
Solution Approach 2:
The automated system allows precise control of forming parameters such as nosepiece position, ply tension, and forming speed. These parameters can be optimized for unidirectional prepreg tape specifically, adjusting the forming process to match the material's properties and enabling effective fabrication that manual methods cannot achieve.
Data Source
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AI summary
A plurality of identical fabrication modules (42) are linked together and configurable to fabricate any of a plurality of differing laminate structures in a family of structures having common features. Each of the fabrication modules is locally adapted to fabricate a section of the laminate structure on a corresponding tool (48). A controller (52) controls and coordinates automated operation of the fabrication modules.