Automated Fiber Placement Rework for Composite Layup
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Solution Overview
Problem
Existing automated fiber placement systems cannot efficiently rework material placement errors in composite part fabrication, as they cannot accurately identify and correct out-of-tolerance inconsistencies in individual tows within a ply.
Innovation Solution
The method involves identifying out-of-tolerance inconsistencies in a current ply using imaging sensors and then using a single-lane automated fiber placement device with an atmospheric pressure plasma heater to deposit replacement tows, allowing for localized rework without damaging surrounding material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a multi-lane automated fiber placement device is used to deposit composite material, then productivity is improved through simultaneous deposition of multiple tows, but the ability to rework individual tows with material placement errors is lost
Solution Approach 1:
The system segments the fiber placement process into two distinct phases: a multi-lane deposition phase for high-speed initial layup, and a single-lane rework phase for targeted correction of defective tows. This segmentation allows each phase to optimize for its specific function, resolving the contradiction between productivity and rework capability.
Solution Approach 2:
The system dynamically transitions between multi-lane and single-lane operational modes based on real-time quality feedback. When material placement errors are detected, the system automatically switches from high-speed multi-lane deposition to precision single-lane rework mode, and then returns to multi-lane mode after correction, making the system adaptable to varying quality requirements.
2Manufacturing precision
If automated detection and rework systems are implemented, then manufacturing precision is improved through identification and correction of out-of-tolerance inconsistencies, but device complexity increases
Solution Approach 1:
The system merges multiple functions into an integrated quality management platform that combines imaging sensors, machine learning-based defect detection, automated toolpath regeneration, and coordination between multi-lane and single-lane depositors. This consolidation manages complexity by creating a unified control system rather than separate independent subsystems.
Solution Approach 2:
The system implements self-service through automated detection and correction of material placement errors without requiring manual intervention. The machine learning model automatically identifies out-of-tolerance inconsistencies, and the control system autonomously generates corrected toolpaths and coordinates rework operations, eliminating the need for human operators to manually inspect and repair each defect.
3Manufacturing precision
If rework is performed on individual tows within a ply, then manufacturing precision is improved by correcting material placement errors, but loss of time occurs due to interruption of the deposition process
Solution Approach 1:
The system applies partial action by performing rework only on the specific tows that contain material placement errors rather than reworking the entire ply or stopping the entire multi-lane deposition process. This selective approach minimizes the time loss associated with rework while still achieving the necessary quality improvements.
Solution Approach 2:
The system maintains continuity of useful action by quickly transitioning to single-lane rework mode for defect correction and then immediately returning to multi-lane deposition mode. The automated nature of the process minimizes idle time, and the use of real-time quality feedback allows the system to resume high-speed deposition as soon as corrections are complete, keeping the overall process flowing continuously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables efficient and precise rework of material placement errors in composite parts, improving the quality of the layup by allowing for the correction of out-of-tolerance inconsistencies without damaging the surrounding substrate or material.
Implementation Method 1
using a single-lane automated fiber placement device with an atmospheric pressure plasma heater to deposit replacement tows
Data Source
AI summary
A method to fabricate a composite part includes identifying an out-of-tolerance inconsistency in a current ply of the layup for the composite part and depositing a replacement tow onto the substrate to rework the out-of-tolerance inconsistency in the current ply for the layup of the composite part. In another example, the method includes depositing tows onto a substrate using a multi-lane automated fiber placement device to form a first ply; after out-of-tolerance inconsistencies in the first ply are identified, depositing replacement tows to rework the out-of-tolerance inconsistencies using a single-lane automated fiber placement device; and depositing additional tows onto the substrate using the multi-lane automated fiber placement device to form a second ply overlaying the first ply. A system for fabricating a layup for a composite part includes the multi-lane automated fiber placement device and the single-lane automated fiber placement device.