Thermal Spray Coating Parameter Control via Test Spot Geometry
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Solution Overview
Problem
Current thermal spraying methods lack precise control over process parameters, leading to inconsistent coating quality and difficulty in predicting the desired coating result, especially for critical components like gas turbine parts.
Innovation Solution
A method involving the production of a test spray spot with initial process parameters, followed by geometric and layer thickness measurements using optical or tactile instruments, with adjustments made to parameters based on deviations from target values to achieve precise control over the coating process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If thermal spraying is performed without precise process parameter control, then the coating process is simpler and faster, but the coating quality becomes inconsistent and unpredictable
Solution Approach 1:
The patent applies preliminary action by performing test spraying before actual coating to determine process parameters. The method creates test spray spots, measures their geometric values, and uses these measurements to calculate optimal process parameters before the main coating operation, ensuring consistent quality without requiring complex real-time control systems.
Solution Approach 2:
The patent implements feedback by measuring geometric values of test spray spots and using these measurements to adjust process parameters. The measured geometric values are fed back into the parameter calculation to optimize coating quality, creating a closed-loop control system that improves consistency without excessive complexity.
2Manufacturing precision
If multiple test injections are performed to determine optimal parameters, then coating quality improves, but production time increases
Solution Approach 1:
The patent performs test spraying and parameter determination as a preliminary action before production coating. By establishing optimal parameters through test spots and geometric measurements in advance, the method eliminates the need for multiple trial injections during production, thereby improving quality while maintaining productivity.
Solution Approach 2:
The patent uses parameter changes by calculating optimal process parameters based on measured geometric values from test spray spots. This mathematical approach to parameter optimization reduces the need for iterative physical testing, thereby decreasing production time while maintaining high coating quality.
3Measurement precision
If geometric measurements are performed on test spray spots, then process parameter accuracy improves, but measurement and analysis time increases
Solution Approach 1:
The patent replaces complex mechanical measurement systems with optical measurement methods. By using optical instruments to measure geometric values of test spray spots and calculating process parameters mathematically, the method achieves high measurement precision while minimizing the time required for measurement and analysis.
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 allows for more precise determination and adjustment of process parameters, resulting in a coating with predictable quality and reduced need for test injections, enhancing the accuracy and reliability of the coating process, particularly for gas turbine components.
Implementation Method 1
a test spray spot is produced on a surface by test spraying with a coating system operated in a first process parameter setting
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a coating process (10) in which a test spray spot is created on a surface by means of a test spraying (12) with a coating system operated in a first process parameter setting. Subsequently, at least one geometric actual value of the test spray spot is determined in a spot determination (13). This at least one geometric actual value is then compared with a predefined target value in an actual value check (14). Subsequently, if the actual value check (14) reveals a deviation of the geometric actual value from the target value, the first process parameter setting is changed to a second process parameter setting in a parameter change (15). Alternatively, if the actual value check (14) reveals no deviation of the geometric actual value from the target value, a component is coated by spraying (16) with the coating system operated in the first process parameter setting.