Calibrating Electron Beam Additive Manufacturing Systems
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Solution Overview
Problem
In additive manufacturing systems using multiple electron beam guns, interaction between the electron beams can occur, leading to inefficiencies and inaccuracies, especially when shielding is impractical or undesirable.
Innovation Solution
A calibration system that includes a calibration probe and a sensing device to measure the response of electron beams, an oscilloscope to detect electrical signals, and an analysis component to synchronize and adjust the electron beam guns' movements and precision, minimizing interaction and optimizing beam coordination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple electron beam guns are used to increase productivity, then manufacturing speed and output improve, but beam interaction between guns occurs causing inaccuracies
Solution Approach 1:
The system performs preliminary calibration by directing each electron beam gun to execute a scan function that impinges on specific portions of a calibration probe. The calibration process establishes predetermined coil values and timing parameters before actual manufacturing, allowing the system to pre-compensate for potential beam interactions and positioning errors that would otherwise occur during production.
Solution Approach 2:
The system employs a sensing device to detect responses generated when electron beams impinge on the calibration probe, converting these responses into electrical signals. An analysis component then processes these signals to evaluate beam positioning and timing, providing feedback that is used to adjust and synchronize the electron beam guns, thereby maintaining manufacturing precision despite the use of multiple guns for increased productivity.
2Manufacturing precision
If shielding is implemented to prevent beam interaction, then beam positioning accuracy improves, but device complexity and manufacturing cost increase
Solution Approach 1:
Instead of implementing physical shielding structures within the build chamber, the system extracts the problem of beam interaction into a calibration and synchronization process. By removing the need for complex shielding hardware and replacing it with software-based coordination and calibration procedures, the system maintains beam positioning accuracy while significantly reducing device complexity and structural interference in the manufacturing environment.
3Manufacturing precision
If calibration and synchronization procedures are implemented, then beam positioning accuracy improves, but calibration time and process duration increase
Solution Approach 1:
The calibration process is performed as a preliminary action before actual manufacturing begins. By establishing the scan functions, predetermined coil values, and timing synchronizations in advance, the system pays the time cost once during calibration rather than continuously during production. This preliminary calibration enables fast, accurate manufacturing operations without repeated time losses.
Solution Approach 2:
The system utilizes adjustable parameters such as coil values and timing settings that can be precisely controlled and optimized. By changing these parameters during calibration and synchronization, the system achieves accurate beam coordination without requiring excessive time, as the parameters can be rapidly adjusted and evaluated through the feedback mechanism rather than requiring lengthy mechanical adjustments.
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 quicker and more accurate formation of metallic articles by avoiding beam interactions and eliminating the need for shielding, enhancing the precision and speed of the additive manufacturing process.
Implementation Method 1
a sensing device positioned to measure and acquire a response generated as a result of impingement of electron beams emitted from the plurality of electron beam guns on the calibration probe
Data Source
AI summary
Devices, systems and methods for calibrating and operating an additive manufacturing system are disclosed. A calibration system for an electron beam additive manufacturing system having a plurality of electron beam guns includes a calibration probe positioned in a build chamber of the electron beam additive manufacturing system, a sensing device positioned to measure and acquire a response generated as a result of impingement of electron beams emitted from the plurality of electron beam guns on the calibration probe, the sensing device generating a response signal as a result of the measured and acquired response, and an analysis component communicatively coupled to the sensing device and programmed to analyze and evaluate the response signal.