Powder Dosing Estimation in Additive Manufacturing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional additive manufacturing systems, such as powder bed fusion (PBF) systems, lack precise regulation of powder dosing, leading to waste and the need for manual operator intervention, as the required powder dosing varies by layer and is often overestimated to prevent short feeds and build crashes.
Innovation Solution
A method and system for estimating and regulating powder dosing in PBF systems, such as direct metal laser melting (DMLM), by creating a dosing plan that accounts for layer-specific requirements, using a controller to manage powder supply based on predetermined dosing needs, and automating dosing adjustments layer-by-layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional PBF systems use manual observation and regulation for powder dosing, then operator flexibility is maintained, but manufacturing precision and productivity deteriorate due to variability and waste
Solution Approach 1:
The system automatically calculates and regulates powder dosing based on layer geometry and build parameters, eliminating the need for manual operator observation and intervention. The controller self-manages the dosing process by reading STL files, calculating required powder amounts, and controlling the piston and recoater mechanisms without human input.
Solution Approach 2:
The system performs preliminary calculations of powder requirements before the build process begins. By analyzing the STL file and calculating dosing plans in advance, the system prepares the dosing strategy beforehand, allowing for precise powder delivery throughout the build without manual adjustments.
2Reliability
If conventional systems overdose powder to prevent short feeds, then build reliability improves, but substance loss increases due to waste in overflow collector
Solution Approach 1:
The system dynamically changes the powder dosing parameters based on the specific requirements of each layer. By calculating the exact powder amount needed for each layer's cross-sectional area and adjusting the piston elevation and recoater positioning accordingly, the system achieves precise dosing that prevents both under-dosing and waste.
Solution Approach 2:
The system applies different powder dosing amounts to different regions and layers based on their specific requirements. Each layer receives the precise amount of powder needed for its cross-sectional area, rather than using a uniform over-dosing approach. This localizes the powder delivery to match the actual build requirements.
3Productivity
If conventional systems lack layer-specific dosing control, then device complexity remains low, but productivity decreases due to extended build times and powder waste
Solution Approach 1:
The system incorporates feedback mechanisms where the controller continuously monitors and adjusts powder dosing based on the build progress and layer requirements. The system reads the STL file, calculates dosing plans, and adjusts the piston and recoater positions in real-time during the build process to maintain optimal powder delivery.
Solution Approach 2:
The system makes the dosing parameters dynamic rather than static. The piston elevation, recoater positioning, and powder delivery rates are continuously adjusted based on the current layer's requirements, allowing the system to adapt to varying cross-sectional areas and build conditions throughout the process.
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 reduces waste, extends build height capability, and eliminates the need for manual intervention by accurately managing powder use, minimizing the risk of running out of powder and reducing part defects.
Implementation Method 1
An energy source directs an energy beam such as a laser or an electron beam onto the thin layer of powder to melt or fuse the sequential layers of powder
Implementation Method 2
with DMLS, or SLS systems, layers of powder are sintered, fusing particles of powder with one another generally without reaching the melting point of the powder
Implementation Method 3
An energy source directs an energy beam such as a laser or an electron beam onto the thin layer of powder
Implementation Method 4
An energy source directs an energy beam such as a laser or an electron beam onto the thin layer of powder
Data Source
AI summary
A method for forming a component includes estimating a dosing plan for powder of a powder bed fusion (PBF) system needed to form the component. The dosing plan includes powder dosing requirements needed per layer to form the component. The method includes providing the dosing plan to a controller of the PBF system. Further, the method includes regulating the powder being supplied to a build chamber of the PBF system from a supply chamber of the PBF system based on the dosing plan. In addition, the method includes additively manufacturing the component via the PBF system using the powder.