Electron Beam Powder Preheating to Suppress Re-Scattering
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Solution Overview
Problem
In additive manufacturing, the interruption of electron beam irradiation due to powder material scattering disrupts the smooth manufacturing process, leading to potential re-scattering issues when resumed from the beginning.
Innovation Solution
An additive manufacturing device and method that preheats the powder material with a charged particle beam, increasing the thermal dose at the scattering position to suppress further scattering, allowing for continuous manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electron beam irradiation is interrupted when powder material scatters, then the quality of manufactured article is maintained, but the manufacturing process cannot proceed smoothly and productivity decreases
Solution Approach 1:
The system performs preliminary detection of powder scattering during electron beam irradiation and takes preventive action by interrupting the beam before significant scattering occurs, thereby maintaining article quality while enabling quicker resumption of manufacturing
Solution Approach 2:
The scattering detection unit continuously monitors powder material behavior during irradiation and provides real-time feedback to the control unit, which adjusts the electron beam irradiation accordingly to prevent quality defects while maintaining manufacturing continuity
2Productivity
If the electron beam irradiation is resumed from the beginning after interruption, then the manufacturing process can continue, but the powder material may scatter again at the same irradiation position
Solution Approach 1:
Before resuming electron beam irradiation at a previously interrupted position, the system performs preliminary detection to check whether powder scattering conditions have changed, ensuring safe resumption and preventing re-scattering at the same position
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
The increased thermal dose at the scattering position effectively reduces powder material scattering, enabling uninterrupted and smooth manufacturing of articles.
Implementation Method 1
preheating a powder material by irradiating the powder material with a charged particle beam
Implementation Method 2
irradiating the powder material with the charged particle beam
Implementation Method 3
melting the powder material by irradiating the powder material with the charged particle beam
Implementation Method 4
irradiating the powder material with the charged particle beam
Data Source
AI summary
An additive manufacturing device manufactures an additively manufactured article by preheating a powder material by irradiating the powder material with a charged particle beam and then melting the powder material by irradiating the powder material with the charged particle beam. The additive manufacturing device includes a beam emitting unit emitting the charged particle beam and irradiating the powder material with the charged particle beam, and a position detection unit detecting a position of scattering of the powder material when the powder material scatters by being irradiated with the charged particle beam. When the powder material scatters by being irradiated with the charged particle beam, the beam emitting unit emits the charged particle beam such that a thermal dose of the preheating is increased at the position of scattering.