Adaptive Toolpath Machining for Complex Surface Variations
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Solution Overview
Problem
Existing machining systems face challenges in efficiently processing components with complex shapes and geometric variations, such as gas turbine engine blades and vanes, due to limitations in adapting to size and surface geometry variances.
Innovation Solution
An adaptive machining system comprising a component measuring device, numerical control machine, system controller, and adaptive machining controller, which compares electronic surface model data to measured data to modify machine tool program instructions, allowing for real-time adjustments and compensation for misalignment, thereby ensuring precise machining of complex components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional machining systems are used for components with complex shapes and geometric variations, then the machining process becomes time-consuming and requires extensive re-machining, but the system lacks the capability to adapt to size and surface geometry variances
Solution Approach 1:
The system performs preliminary measurement of the component's actual geometry before machining, creates a digital model of the as-received component, and calculates the adaptive toolpath in advance. This preliminary action allows the system to adapt to geometric variations without requiring time-consuming re-machining operations, thereby improving both adaptability and productivity
Solution Approach 2:
The machining system dynamically adjusts the toolpath and machining parameters based on the measured geometric variations of the component. The adaptive controller modifies cutting depths, feed rates, and tool positions in real-time according to the actual surface geometry, enabling the system to handle variations efficiently without sacrificing productivity
2Manufacturing precision
If traditional machining systems process components with geometric variations, then extensive re-machining is required to achieve desired accuracy, but this increases machining time and reduces productivity
Solution Approach 1:
The system incorporates measurement feedback by scanning the component's actual geometry, comparing it to the target geometry, and using this information to adjust the machining process. This closed-loop feedback ensures high manufacturing precision while minimizing the need for multiple re-machining passes, thereby reducing total machining time
Solution Approach 2:
The system performs preliminary measurement and creates an adaptive machining strategy before the actual machining begins. By pre-calculating the toolpath based on measured geometric variations, the system achieves the desired surface smoothness and contour accuracy in fewer passes, significantly reducing machining time
3Manufacturing precision
If adaptive machining with measurement and model creation is implemented, then machining precision and adaptability improve, but system complexity increases
Solution Approach 1:
The system replaces complex mechanical measurement and adjustment mechanisms with digital modeling and computer-controlled adaptive toolpath generation. By using software-based adaptive control and digital twins of the component geometry, the system achieves high contour accuracy while avoiding the complexity of multiple mechanical subsystems
Solution Approach 2:
The adaptive machining system integrates measurement, modeling, and machining functions into a single multi-functional platform. The same system performs geometric measurement, creates digital models, calculates adaptive toolpaths, and executes machining operations, reducing overall system complexity compared to separate dedicated systems for each function
Data Source
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AI summary
In some examples, an adaptive machining system may include a model comparison unit, a compromise shape determination unit, and a program modification unit. The model comparison unit can be configured to compare electronic measured dimensional surface data of a component with an electronic surface model of the component. The compromise shape determination unit can be configured to determine a compromise shape for the component based on the comparison. The program modification unit can be configured to modify a machine tool program code based on the compromise shape.