Grinding Mechanism Coating Removal Vibration Monitoring
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Solution Overview
Problem
Existing methods for removing thermal barrier coatings (TBC) from gas turbine components are inefficient and lack precision, often requiring manual monitoring and inspection, which can lead to uneven substrate material removal and reduced component service life.
Innovation Solution
A system and method utilizing a grinding mechanism controlled by a computer-readable medium to monitor and evaluate a variable operating parameter, allowing for automated detection of coating layer removal based on predetermined thresholds, enabling accurate traversal and depth control during the removal process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual monitoring and inspection are used during coating removal, then the process can be controlled, but the substrate material removal becomes uneven and component service life is reduced
Solution Approach 1:
The system continuously monitors the operating parameter (vibration frequency) during the grinding process and uses this feedback to detect when the coating has been removed. The controller adjusts the grinding process in real-time based on this feedback, automatically transitioning from coating removal mode to substrate finishing mode when the coating is detected to be removed, thereby preventing excessive substrate material removal while ensuring complete coating removal.
Solution Approach 2:
The patent replaces manual visual inspection and mechanical measurement methods with an automated sensing system that detects coating removal through vibration frequency analysis. This substitution of mechanical/manual monitoring with a sensor-based detection system enables more precise control of the removal process, reducing substrate material loss while maintaining manufacturing precision.
2Measurement precision
If automated detection is implemented, then coating removal precision is improved, but the device complexity increases
Solution Approach 1:
The patent introduces a sensor as an intermediary element that indirectly detects coating removal by measuring vibration frequency changes rather than directly measuring coating thickness or presence. This intermediary measurement approach simplifies the detection system compared to direct measurement methods while maintaining high measurement precision, as the vibration frequency serves as a proxy indicator for coating removal status.
3Reliability
If manual inspection is used to determine removal duration, then the process can be monitored, but productivity is reduced due to manual intervention
Solution Approach 1:
The system performs self-monitoring and self-adjustment during the coating removal process. The sensor automatically detects when the coating has been removed and the controller automatically transitions the grinding process to the next stage, eliminating the need for manual inspection and intervention. This self-service capability maintains reliable process monitoring while significantly improving productivity by enabling continuous automated operation.
4Reliability
If prolonged grinding is applied to ensure complete coating removal, then coating removal completeness is improved, but substrate material loss increases
Solution Approach 1:
The system performs preliminary detection of coating removal status during the grinding process by monitoring vibration frequency changes. This preliminary action allows the system to determine when the coating has been sufficiently removed before proceeding to complete substrate finishing, preventing prolonged grinding that would cause excessive substrate material loss while ensuring adequate coating removal completeness.
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 solution ensures accurate and automated removal of multi-layer coatings, reducing substrate material loss and extending the service life of gas turbine components by precisely determining when each coating layer is removed.
Implementation Method 1
a grinding mechanism configured to remove the multi-layer coating from the substrate
Implementation Method 2
monitor vibrations of the grinding mechanism during the first removal mode
Data Source
AI summary
A system for use in removing a multi-layer coating (116) from a substrate (118) is provided. The multi-layer coating includes a first coating (124) applied to the substrate and a second coating (126) applied over the first coating. The first coating (124) is formed from a first material and the second coating (126) is formed from a second material different from the first material. The system includes a grinding mechanism (102) configured to remove the multi-layer coating from the substrate (118), and a controller (104) coupled in communication with the grinding mechanism (102). The controller is configured to position the grinding mechanism (102) against the multi-layer coating (116), initiate a first removal mode (110) that directs the grinding mechanism (102) to traverse across the substrate, monitor a variable operating parameter of the grinding mechanism (102) during the first removal mode (110), and evaluate a value of the variable operating parameter against a predetermined threshold to determine whether the second coating (126) has been removed from the substrate.