AFP Layup Strategy Analysis for Tow Count and Fiber Precision
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Solution Overview
Problem
Automated fiber placement (AFP) manufacturing faces challenges in producing laminate parts with complex shapes while maintaining specified fiber angle orientations, due to limitations such as insufficient roller pressure for cohesion and adhesion, and issues with tow compression leading to flaws like folds and puckers.
Innovation Solution
A layup strategy analysis tool that includes a memory storing analysis instructions and processors to execute them, which obtains 3D model data and process data to generate output indicating the optimal number of tows that can be simultaneously applied during a single pass, based on the object's geometry and manufacturability constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fewer and smaller tows are used to address fiber placement and orientation concerns, then manufacturing precision is improved, but productivity deteriorates since it takes longer to build up each layer
Solution Approach 1:
The system dynamically adjusts the number of tows applied per pass based on real-time analysis of object geometry and manufacturability constraints. The layup strategy analysis tool evaluates different configurations and optimizes the tow count for each specific location, allowing the process to adapt between using more tows for efficiency in suitable areas and fewer tows for precision in complex areas.
Solution Approach 2:
The invention changes the parameter of tow count from a fixed value to a variable that is optimized based on geometric constraints and manufacturability criteria. By analyzing the 3D model data and process data, the system determines the optimal number of tows for each location, balancing precision requirements with manufacturing efficiency.
2Manufacturing precision
If the roller presses fibers onto the working surface with sufficient pressure to ensure cohesion and adhesion, then manufacturing precision is improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The system performs preliminary analysis of the object geometry and manufacturability constraints before the actual fiber placement process. The layup strategy analysis tool evaluates the 3D model data and process data in advance to determine optimal layup strategies, including the number of tows per pass, which helps pre-plan the pressure application requirements without adding complex real-time control mechanisms.
Solution Approach 2:
The analysis system uses the existing process data and geometry information to self-determine the optimal parameters for fiber placement. By analyzing the manufacturability constraints and object geometry, the system autonomously identifies the appropriate tow count and placement strategy without requiring additional complex external control systems.
3Manufacturing precision
If the tow changes directions to keep fibers aligned with the as-designed fiber orientation, then manufacturing precision is improved, but object-generated harmful factors increase due to compression causing folds and puckers
Solution Approach 1:
The system performs preliminary analysis to identify potential compression defects before they occur during manufacturing. By analyzing the 3D model data and process data, the layup strategy analysis tool predicts areas where tow compression might cause folds or puckers and adjusts the layup strategy in advance to avoid these harmful effects while maintaining fiber alignment accuracy.
Data Source
AI summary
A layup strategy analysis tool including a memory storing layup strategy analysis instructions and one or more processors configured to execute the layup strategy analysis instructions. During execution, the layup strategy analysis instructions obtain model data representing a three-dimensional (3D) model of an object to be formed using an automated fiber placement process. The layup strategy analysis instructions also obtain process data descriptive of the automated fiber placement process and one or more automated fiber placement machines. The layup strategy analysis instructions also generate output indicating a count of a number of tows that can be simultaneously applied during a single pass based on a geometry of the object and based on manufacturability constraints indicated by the process data.