Composite Ply Layup Tool Paths for Surface Tolerance Control
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Solution Overview
Problem
In composite manufacturing, achieving precise surface quality and dimensional tolerances is challenging due to variations in raw materials and processing conditions, leading to inconsistencies and structural weaknesses in composite structures, particularly when using automated layup equipment.
Innovation Solution
A method involving measuring intermediate surfaces of composite structures using high-accuracy equipment, such as laser trackers, to generate modified tool paths for composite placement machines, ensuring that the laydown surface matches the measured surface profiles, thereby reducing inconsistencies and improving surface quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated layup equipment is used to improve productivity, then manufacturing speed increases, but surface quality consistency deteriorates due to material and processing variations
Solution Approach 1:
The system performs preliminary measurement of the intermediate surface before completing the layup process. By measuring the actual surface profile early in the process, the system can predict and compensate for potential surface quality issues before they affect the final product, thus maintaining consistency even with automated high-speed equipment
Solution Approach 2:
The system implements feedback by using measured intermediate surface data to modify subsequent tool paths. The actual surface measurements feed back into the control system, which adjusts the layup parameters in real-time to compensate for variations, ensuring consistent surface quality while maintaining automated productivity
2Reliability
If tight dimensional tolerances are required for mating surfaces to ensure high quality joining, then joining quality improves, but manufacturing complexity increases due to the need for precise control
Solution Approach 1:
The system changes the control parameter from fixed predetermined tolerances to dynamic tolerance compensation based on actual measurements. By adjusting the tool path parameters according to measured surface variations, the system achieves tight joining tolerances without requiring overly complex precision control mechanisms throughout the entire manufacturing process
Solution Approach 2:
The system performs preliminary measurement and analysis of the intermediate surface before final joining operations. This advance knowledge allows the system to plan and execute precise joining operations tailored to the actual surface conditions, achieving high joining quality without requiring excessive complexity in the joining equipment itself
3Manufacturing precision
If intermediate surfaces are measured with high accuracy equipment to improve surface quality, then manufacturing precision improves, but measurement and process complexity increases
Solution Approach 1:
The system applies partial measurement action by measuring only the critical intermediate surfaces that directly affect final surface quality, rather than measuring the entire component. This selective measurement approach achieves sufficient manufacturing precision without requiring comprehensive complex measurement systems
Solution Approach 2:
The system uses an intermediary computational process that translates intermediate measurement data into corrected tool paths. This intermediary layer allows the use of relatively simple measurement equipment while achieving high final surface quality through intelligent data processing and tool path modification
Data Source
AI summary
A process and system for improving surface quality of composite structures, including laying up a first set of composite plies including a first outer ply of a first composite structure. A first intermediate surface of the first outer ply is measured to form a first set of measurements. A laydown surface for a tool path of a composite placement machine is modified to form a modified tool path, wherein modifying the laydown surface comprises modifying the laydown surface such that a laydown surface of the modified tool path matches the first set of measurements. A composite ply is laid down using the composite placement machine and the modified tool path.