safe operation of selective laser melting tools with ... · s. jakschik, w. koehler | ult ag 10th...
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S. Jakschik, W. Koehler | ULT AG
10th LAM Conference Schaumburg, IL
Safe operation of Selective Laser Melting
tools with respect to gas cleaning.
Dr. Mario Mustermann
2S. Jakschik| ULT AG
Motivation
Sold systems:
2015: over 12.000 systems
Source : Max Planck
Additive Manufacturing: An exciting market with creative products and complex selection of base materials
Source : Author
Source: Author
Dr. Mario Mustermann
3S. Jakschik| ULT AG
Selection of additive manufacturing processes
Source: VDMA
polymers Metals/
polymersSiO2, Metals/
polymersPolymers, wax Paper. polymers,
CIP
Polymer Metals
Dr. Mario Mustermann
4S. Jakschik| ULT AG
Classification by a filtration view
Additive Manufacturing
Inert Gas-systems
Air Systems
Seletive laser melting -metals
Laser-Cladding
polymers print
polymers print
Sand
Dr. Mario Mustermann
5S. Jakschik| ULT AG
The seven air pollutants in additive manufacturing and their potentialhazards for humans, machines, and products
Dr. Mario Mustermann
6S. Jakschik| ULT AG
The seven air pollutants in additive manufacturing and their potentialhazards for humans, machines, and products
Dr. Mario Mustermann
7S. Jakschik| ULT AG
Tasks of air handling during AM depend on procedure type
Dr. Mario Mustermann
8S. Jakschik| ULT AG
Tasks of air handling during AM depend on procedure type
Dr. Mario Mustermann
9S. Jakschik| ULT AG
Experiment – Metall 3D SLM/Sintering
Dr. Mario Mustermann
10S. Jakschik| ULT AG
Laser-Processes
ultra fast laser CW Laser
Quelle: D. T. Pham Laser Milling
Dr. Mario Mustermann
11
Stefan Jakschik | ULT AG
Sice of particles
Quelle:
Analysis of particle size with laser melting (SSRM) Maximum between 100nm…200nm indication of sub 10nm particles Comparable to USP laser processes
Particle size [nm]
Co
ncen
trati
on
dN
[#/c
m³]
raw gas
raw gas
raw gas
Dr. Mario Mustermann
12S. Jakschik| ULT AG
Ultra short puls laser particle SEM-images
A mesh of non melted particles, produced by ultra fast laser in air
Dr. Mario Mustermann
13S. Jakschik| ULT AG
SEM image of laser induced particles during Ar based melting
ULT project ConPam: AlSi7Mg, 20 µm, 1 µm und <20 nm
Particle size significant below 20nm
Dr. Mario Mustermann
14S. Jakschik| ULT AG
Solution
Dr. Mario Mustermann
15S. Jakschik| ULT AG
Solution
Dr. Mario Mustermann
16S. Jakschik| ULT AG
Solution
Dr. Mario Mustermann
17S. Jakschik| ULT AG
Requirements
process polutant filterEx requirment
Inertgas Metal ParticleParticle filter
Only during service
Inert polymers Melted products Particle filter, gas filter
Only during service
Air polymers Particles, burned polymers Particle filter, gas
filter
To be evaluated for operation as well
Air sand Particle solventsParticle filter, gas filter
To be evaluated for operation as well
Dr. Mario Mustermann
18S. Jakschik| ULT AG
Inertization of micro- and nano-scale particlesMetal powder with dust
Fig. 11. flame distribution of 70% micro Ti/30% nano TiO2
minimum ignition energy (MZE) ≥ 10 mJ - normal shot ignition sensitiveminimum ignition energy (MZE) 3-10 mJ - notably shot ignition sensitiveminimum ignition energy (MZE) ≤ 3 mJ - extrem shot ignition sensitive
1
22
1 1 13
1 13 3
0,016
14
0,28 0,25
0,082 0,019
0,1102468
1012141618202224
MZE, Staubwolke [mJ]
Quellen: Wu2009, Eckhoff2012,Yuan2017Dank an M. Berger
Dr. Mario Mustermann
19S. Jakschik| ULT AG
Inertization of micro- and nano-scale particlesMetal powder with dust
Dr. Mario Mustermann
20S. Jakschik| ULT AG
Inert Gas Systems - operation
EX
extinguable: given
ignitionOxygen not
present
attention: With inertization sensor is necessary. minimum: < 2% O2
Dr. Mario Mustermann
21S. Jakschik| ULT AG
Inert Gas Systems – Service
Prevention of ignition very complex for ignition energy in mJrange
Ensure inertization chain
EX
extinguable: given
ignitionOxygen not
present
Dr. Mario Mustermann
22S. Jakschik| ULT AG
Summary
1. Airborne pollutions my be generated along during the
additive manufacturing process chain.
2. For process quality build area has to be clean as well
3. Filtration technology needs to take fire and Ex consideration
into account
4. Proven technical solutions exist.
Thank you for your attention.
ULT AG, Firmensitz: Am Göpelteich 1, OT Kittlitz, D-02708 Löbau
Telefon: +49 (0) 35 85 - 41 28 - 0, Telefax: +49 (0) 35 85 - 41 28 -11, URL: www.ult.de, E-Mail: [email protected]
ULT AG, Firmensitz: Am Göpelteich 1, OT Kittlitz, D-02708 Löbau
Telefon: +49 (0) 35 85 - 41 28 - 0, Telefax: +49 (0) 35 85 - 41 28 -11, URL: www.ult.de, E-Mail: [email protected]
For further details please contact
Wolfgang KöhlerULT LLC6000 W. Executive Drive, Suite GMequon, WI 53092