Electron Beam Powder Bed Heating After Powder Scattering
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Solution Overview
Problem
In additive manufacturing, the scattering of powder material during electron beam irradiation disrupts the manufacturing process, leading to inefficiencies and potential device malfunctions due to the need to restart operations in suboptimal heating conditions.
Innovation Solution
An additive manufacturing device and method that includes a detection unit to identify powder material scattering, a heating unit to preheat the irradiation region before resupplying powder, and a beam emitting unit that stops and restarts the charged particle beam irradiation after the region is heated, ensuring a stable high-temperature environment for continued manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the charged particle beam irradiation is stopped and restarted after powder material scattering is detected, then the scattering can be addressed, but the manufacturing process cannot proceed smoothly and productivity decreases
Solution Approach 1:
The heating unit performs preliminary heating of the irradiation region before new powder material is supplied. This pre-heating action prepares the environment in advance to prevent scattering from occurring in the first place, allowing the manufacturing process to resume smoothly without repeated interruptions, thus improving both reliability and productivity
2Productivity
If beam irradiation is performed in the same heating circumstances after powder material is supplied to the irradiation region, then manufacturing can continue, but there is concern that powder material may scatter again
Solution Approach 1:
The system changes the temperature parameter of the irradiation region by heating it before supplying new powder material. This parameter change creates optimal heating conditions that prevent scattering, allowing continuous manufacturing while maintaining reliability
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 effectively curbs powder material scattering, allowing for smoother and more efficient article manufacturing by maintaining a high-temperature state during resumption of irradiation, reducing the likelihood of recurrence and device malfunctions.
Implementation Method 1
a heating unit heating the irradiation region
Implementation Method 2
irradiating the powder material with the charged particle beam, and melting the powder material
Data Source
AI summary
An additive manufacturing device performs manufacturing of an additively manufactured article by supplying a powder material to an irradiation region of an electron beam, laying and leveling the powder material, irradiating the powder material with the electron beam, and melting the powder material. The additive manufacturing device determines whether or not the powder material has scattered during manufacturing of the article. When it is determined that the powder material has scattered, an irradiation region R is heated by a heater before a new powder material is supplied to the irradiation region R. Manufacturing of the article is restarted after the new powder material has been supplied to the heated irradiation region.