Electron Beam Additive Manufacturing Feedback Control for Melt Pool Precision

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Solution Overview

Problem

Existing layer manufacturing techniques using electron beam energy emission devices lack automated feedback controls, relying heavily on human intervention and subjective observations, which can lead to inefficiencies and inaccuracies in the fabrication of three-dimensional articles.

Innovation Solution

A closed-loop control system is implemented, utilizing a cooled camera housing, vapor protection device, and alignment fixture for real-time monitoring of molten pool deposits, allowing for automatic adjustments of processing conditions, such as electron beam power and feed rates, to ensure precise control and high output rates in electron beam additive manufacturing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If open loop fashion with human intervention is used, then flexibility in parameter adjustment is improved, but manufacturing precision and reliability deteriorate due to subjectivity and delays

Engineering Contradiction:
Improveflexibility in parameter adjustmentVSAvoidprecision of buildup process
Core Design Contradiction:
Ease of operationVSManufacturing precision

Solution Approach 1:

The patent implements a closed-loop control system that continuously monitors the layer manufacturing process and automatically adjusts operating parameters based on real-time feedback. Sensors detect deviations from the forecasted buildup process and feed this information back to the control system, which then modifies parameters such as electron beam power, material feed rate, and layer thickness to maintain precision and reliability while eliminating subjective human observation.

Inventive Principle:
Principle #23Feedback

2Manufacturing precision

If automated feedback controls are implemented, then manufacturing precision and reliability are improved, but device complexity increases

Engineering Contradiction:
Improveprecision of buildup processVSAvoidcomplexity of control system
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent replaces manual mechanical observation and adjustment with an automated electronic control system. Optical sensors, cameras, and computer vision algorithms substitute for human visual inspection, while programmable logic controllers and software-based parameter adjustment replace manual mechanical controls. This substitution increases precision while managing complexity through automation and digital control rather than mechanical systems.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If real-time monitoring and automatic adjustments are made, then productivity and efficiency are improved, but device complexity and cost increase

Engineering Contradiction:
Improveoutput rate of fabricationVSAvoidcomplexity of monitoring system
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent implements a self-regulating control system that automatically detects process deviations and adjusts parameters without external intervention. The system monitors its own performance through integrated sensors and self-corrects by modifying electron beam parameters, material feed rates, and layer deposition conditions. This self-service capability increases productivity by eliminating delays for manual intervention while containing complexity through autonomous operation.

Inventive Principle:
Principle #25Self-service

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 enables rapid and accurate fabrication of three-dimensional articles with high precision and efficiency, reducing the need for human intervention and minimizing errors by providing real-time data and automatic process adjustments.

Implementation Method 1

electron beam additive manufacturing (EBAM)... using an energy emission device and specifically an electron beam energy

Methodology Applied
Scientific EffectElectron beam: Electron Beam

Implementation Method 2

cooled camera housing... for real-time monitoring of molten pool deposits

Methodology Applied
Scientific EffectCooling: Cooling

Data Source

PatentUS12036604B2Electron beam additive manufacturing system and control components
Publication Date: 2024.07.16 SCIAKY SA
  • US12036604B2 patent drawing
  • US12036604B2 patent drawing
  • US12036604B2 patent drawing

AI summary

A layer manufacturing apparatus comprising: (a) a main chamber; (b) one or more energy emission devices; (c) one or more work piece supports; (d) a plurality of material delivery devices; wherein the plurality of material delivery devices are connected to one or more spools that are located external of the main chamber.