Dust Particle Counter for Powder Bed Fusion Process

Area of Science:

• Materials Science
• Mechanical Engineering
• Physics

Background:

• Continuous dust monitoring is crucial in various industrial processes.
• Existing dust detection methods may have limitations in accuracy or scope.
• Powder bed fusion processes require precise control over particle characteristics.

Purpose of the Study:

• To develop and validate a novel laser-based dust detector for continuous monitoring.
• To establish a method for determining dust concentration based on particle size and number.
• To assess the detector's performance for applications like powder bed fusion.

Main Methods:

• Utilized an innovative laser system for dust detection.
• Conducted measurements using FeNi18Co9Mo5 (maraging MS1 steel) particles.
• Compared experimental data with particle fall times calculated via Navier-Stokes equation.
• Performed sieve analysis and laser system detection on measurement powder.

Main Results:

• Developed a formula to determine dust concentration from particle count and size.
• Achieved a measurement range of 16 to 100 µm with applied filtration.
• Demonstrated successful continuous dust monitoring capabilities.
• Validated measurements against theoretical calculations.

Conclusions:

• The novel laser dust detector is effective for continuous monitoring applications.
• The developed formula provides a reliable method for dust concentration assessment.
• The technology shows promise for integration into powder bed fusion systems.