Ceramic Matrix Composite Ply Stacking for Consistent Automated Layup
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Solution Overview
Problem
Ceramic matrix composites require different processing methods due to their brittleness and stiffness compared to polymer matrix composites, leading to variability in quality, increased cycle time, and labor costs in manufacturing, as well as the need for skilled technicians in hand-layup processes.
Innovation Solution
An electronically-controlled method for manufacturing ceramic matrix composite structures involves transporting and processing ceramic matrix composite plies using automated mechanisms to form stacks, which are then compacted and shaped at a remote location, enabling automated quality inspection and reduced manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hand-layup process is used to manufacture ceramic matrix composite structure, then skilled technicians can process the brittle and stiff ceramic fibers, but variability of quality and consistency increases
Solution Approach 1:
The patent replaces the manual mechanical hand-layup process with an automated material placement system that uses computer-controlled mechanisms to position ceramic matrix composite plies. This substitution eliminates human variability while maintaining the ability to handle brittle and stiff ceramic fibers, thereby improving quality consistency without sacrificing processing capability
Solution Approach 2:
The automated material placement system incorporates self-aligning features and automated inspection mechanisms that allow the system to self-correct and self-verify its work. This reduces dependence on skilled technician judgment while maintaining high processing standards, resolving the contradiction between ease of operation and manufacturing precision
2Ease of operation
If hand-layup process is used to manufacture ceramic matrix composite structure, then skilled technicians can handle the material, but cycle time increases
Solution Approach 1:
The automated material placement system replaces manual material handling operations with robotically-controlled mechanisms that can quickly and accurately position ceramic matrix composite plies. This substitution maintains the ability to handle difficult materials while dramatically reducing the time required for each placement operation, thereby improving productivity without sacrificing material handling capability
Solution Approach 2:
The automated system enables continuous operation without the interruptions inherent in manual processes. Multiple plies can be placed in sequence without removing tools or repositioning equipment, and the system can operate continuously to build up thick composite structures, eliminating the cycle time extensions associated with hand-layup methods
3Manufacturing precision
If hand-layup process is used to manufacture ceramic matrix composite structure, then manual inspection and rework can be performed, but labor costs increase
Solution Approach 1:
The automated material placement system incorporates automated inspection mechanisms that use sensors and imaging systems to detect placement errors and quality defects. This substitution of automated inspection for manual inspection maintains high quality standards while eliminating the need for additional manual rework operations, thereby reducing labor requirements without compromising manufacturing precision
Solution Approach 2:
The system incorporates real-time feedback mechanisms that monitor material placement quality as it occurs. When defects or misalignments are detected, the system automatically adjusts subsequent placement operations or triggers corrective actions, eliminating the need for separate manual inspection and rework stages while maintaining high quality standards
Data Source
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Figure 3A~3D
Figure 3E~3H
AI summary
An electronically-controlled method (700, 800, 900) is provided for manufacturing a ceramic matrix composite structure (500) with a desired shape, the electronically-controlled method comprising: - processing (block 802) at a first location a plurality of ceramic matrix composite plies to form a stack (400) of the plurality of ceramic matrix composite plies (212, 222), wherein the processing comprises: - picking (902) a first ceramic matrix composite ply (212) that is sandwiched between a first bottom backing film (213) and a first top backing film (211); - placing (904) the first ceramic matrix composite ply (212) on a table surface (104) at a first location; - peeling away (906) the first top backing film (211) from a top surface of the first ceramic matrix composite ply (212); - picking (908) a second ceramic matrix composite ply (222) that is sandwiched between a second bottom backing film (223) and a second top backing film (221); - peeling away (910) the second bottom backing film (223) from a bottom surface of the second ceramic matrix composite ply (222); - placing (912) the bottom surface of the second ceramic matrix composite ply (222) on the top surface of the first ceramic matrix composite ply (212) to form a stack (400) comprising at least the first ceramic matrix composite ply (212) and the second ceramic matrix composite ply (222); - transporting (block 804) the stack (400) of plurality of ceramic matrix composite plies (212, 222) from the first location to a second location which is remote from the first location, wherein the transporting comprises: - transporting (914) the stack (400) from the table surface (104) at the first location to a tool surface (112) at a second location which is different from the first location to enable the stack (400) to be manufactured as the ceramic matrix composite structure (500) with the desired shape at the second location; and - processing (block 804) at the second location the stack (400) of plurality of ceramic matrix composite plies (212, 222) to provide the ceramic matrix composite structure (500) with the desired shape.