CAD Compensation Field for Additive Manufacturing Distortion
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Solution Overview
Problem
Additive manufacturing (AM) processes face challenges with distortion mitigation, leading to unusable components due to thermal and mechanical stresses, resulting in multiple iterations before achieving geometric precision.
Innovation Solution
A method and system that generates a nominal CAD image, produces a physical component, measures deviations, determines a compensation field if deviations exceed a tolerance threshold, and modifies the CAD image to produce a corrected physical representation, reducing distortions and iterations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional additive manufacturing processes are used without distortion compensation, then the manufacturing process is simple, but the manufacturing precision deteriorates due to thermal and mechanical stresses causing layer shifts
Solution Approach 1:
The patent applies preliminary action by generating a distortion compensation field before the additive manufacturing process. The system predicts thermal and mechanical stresses, calculates layer shifts, and pre-compensates the toolpath to counteract expected distortions. This allows the component to achieve geometric precision after cooling without requiring complex real-time intervention during manufacturing.
Solution Approach 2:
The patent implements feedback by measuring the actual geometric deviations of a test component after manufacturing, comparing these measurements against the predicted distortions, and using this information to refine and update the distortion compensation field for subsequent manufacturing iterations. This closed-loop approach continuously improves precision while maintaining process simplicity.
2Manufacturing precision
If multiple iterations are performed to achieve geometric precision, then the manufacturing precision improves, but the productivity deteriorates due to repeated production of non-relevant components
Solution Approach 1:
The system performs preliminary distortion compensation by predicting thermal and mechanical stresses and pre-calculating the compensation field before manufacturing. This allows the first or second iteration to produce a geometrically relevant component directly, eliminating the need for multiple redundant iterations and significantly improving productivity while maintaining high precision.
Solution Approach 2:
The system enables self-service by automatically generating and updating distortion compensation fields without requiring manual intervention or extensive rework. The automated measurement and field update process allows the system to self-correct across iterations, reducing the number of non-relevant components produced and improving overall production efficiency.
3Manufacturing precision
If distortion compensation is implemented through multiple iterations, then the manufacturing precision improves, but the loss of time and resources increases due to producing unusable components
Solution Approach 1:
The patent applies preliminary action by pre-calculating distortion compensation fields based on predicted thermal and mechanical stresses before manufacturing begins. This allows the system to produce geometrically relevant components in early iterations without requiring multiple time-consuming correction cycles, thereby reducing cycle time and resource waste while achieving high precision.
Solution Approach 2:
The system uses feedback by measuring actual geometric deviations and automatically updating the distortion compensation field for subsequent iterations. This closed-loop approach minimizes the number of iterations needed to achieve precision, reducing both time loss and resource consumption compared to conventional multi-iteration processes.
4Manufacturing precision
If distortion compensation is implemented through multiple iterations, then the manufacturing precision improves, but the loss of energy and materials increases due to producing non-relevant components
Solution Approach 1:
The patent applies preliminary action by pre-calculating distortion compensation fields before manufacturing, enabling the production of geometrically relevant components in early iterations. This reduces the number of non-relevant components that require material consumption and subsequent disposal or rework, thereby minimizing material waste and energy consumption while achieving high precision.
Solution Approach 2:
The system enables self-service by automatically measuring geometric deviations and updating distortion compensation fields without manual intervention. This reduces the number of iterations needed to produce usable components, minimizing material waste and energy consumption associated with producing and discarding non-relevant parts while maintaining high manufacturing precision.
Data Source
AI summary
According to some embodiments, system and methods are provided comprising generating a nominal computer-aided design (CAD) image of a component; producing a physical representation of the component from the nominal CAD image using an additive manufacturing (AM) process; measuring the physical component to obtain measurement data; determining a deviation between geometry associated with the nominal CAD image and the obtained measurement data; determining a compensation field for the deviation, if the deviation is outside of a tolerance threshold; modifying the nominal CAD image by the compensation field; and producing a physical representation of the component from the modified nominal CAD image. Numerous other aspects are provided.