CMC Part Cut Path Planning Around Fabrication Defects
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Solution Overview
Problem
The high cost and waste associated with manufacturing ceramic matrix composite (CMC) parts due to defects detected during fabrication, leading to scrapped parts and increased piece prices, hinder the widespread adoption of CMCs in aerospace applications.
Innovation Solution
A method and system for identifying defect locations in solid base material and generating a cut path that excludes these defects, allowing for the fabrication of parts from the base material while optimizing material usage, thereby reducing waste and improving production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If CMC material is placed in a mold close to final part geometry, then manufacturing precision is improved, but defects are detected during inspection resulting in part scrapping and increased waste
Solution Approach 1:
The system performs preliminary defect detection and cut path planning before the actual cutting operation. By identifying defect locations in advance and pre-calculating optimized cut paths that avoid these defects, the system prevents part scrapping before manufacturing begins, thereby reducing CMC material waste while maintaining manufacturing precision
Solution Approach 2:
The system changes the cutting parameters dynamically by generating multiple alternative cut paths based on defect locations and selecting the optimal path that maximizes material utilization. This parameter optimization allows the system to adapt the cutting strategy to avoid defects while minimizing waste
2Reliability
If defects are detected and parts are scrapped, then part quality is maintained, but production rate decreases and costs increase
Solution Approach 1:
The system performs preliminary defect detection and cut path optimization before manufacturing, allowing multiple parts to be planned from a single CMC piece while avoiding defects. This pre-planning ensures that only defect-free regions are used, maintaining part quality while maximizing the number of acceptable parts produced, thereby increasing production rate
Solution Approach 2:
The system segments the CMC base material into multiple potential part locations based on defect maps, allowing simultaneous planning of multiple parts from one raw material piece. This segmentation strategy enables the system to produce multiple acceptable parts while maintaining quality standards, thus improving productivity
3Ease of manufacture
If traditional cutting methods are used, then manufacturing process is simple, but material utilization is low resulting in high costs
Solution Approach 1:
The system employs automated defect detection and self-service cut path generation algorithms that automatically optimize material utilization without requiring complex manual intervention. The system serves itself by integrating inspection data directly into cut path planning, achieving high material utilization efficiency while maintaining ease of manufacture through automation
Solution Approach 2:
The system optimizes cutting parameters by generating multiple alternative cut paths and selecting the one that maximizes material utilization. This parameter optimization automatically adjusts cutting strategies to minimize waste while keeping the manufacturing process simple through automated decision-making
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
The method reduces defects in final parts, lowers manufacturing costs, and increases the production rate of acceptable parts by maximizing the use of solid base material, thus making CMCs more cost-effective for aerospace components.
Implementation Method 1
generating an x-ray image of the piece of solid base material
Implementation Method 2
performing an ultrasound inspection of the piece of solid base material
Implementation Method 3
performing a fluorescent penetrant inspection of the piece of solid base material
Data Source
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AI summary
A method of fabricating parts is provided. The method comprises identifying a location of a defect (510) in a piece of solid base material (500), generating a cut path (520) through the piece of solid base material (500) as a function of the location of the defect (510), and fabricating the parts from the piece of solid base material (500) by executing the cut path (520), the executing including cutting the piece of solid base material (500) along the cut path such that all the parts, once cut out of the piece of solid base material (500), exclude the defect (510).