Metal 3D Printing Overview and the Best SLM/DMLS 3D Printers on the Market
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- Опубліковано 1 жов 2024
- Metal 3D Printing Overview and the Best SLM/DMLS 3D Printers on the Market
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Hi everyone! This is Top 3D Shop, and in this video, we will tell you about SLM 3D printing and the most prominent equipment based on this technology.
Selective laser melting, or SLM, is the technology behind most 3D printers using metals as consumable. DMLS, DMLM, LMF, LPBF, SLM are different names for the same printing method. Some terms have developed historically, while others are trademarks. Referring to the inventors of the technology from the Fraunhofer Institute in Germany, the most appropriate term would be LPBF - Laser Powder Bed Fusion. In our guide, we are going to use the term SLM as the most common name for the technology today.
So, what is the essence of this additive method? In short, potent lasers selectively fuse metal powder layer by layer. The required volume of powder is placed on a platform, which, after fusing a layer, is lowered to a predetermined height, equal to the layer thickness. The next layer of material is applied on top and the procedure is repeated until the part is finished.
SLM refers to additive methods that do not require special support structures. On the one hand, the whole volume of powder in which the model is formed acts as support. On the other hand, supports are needed since the difference in temperature between the melt zone and the surrounding powder can lead to certain deformations. In this method, supports are used to remove excessive heat from the work area.
Today, SLM 3D printers use both pure metal powders and metal alloy ones. The most common consumables are aluminum, cobalt-chrome, copper, nickel (Inconel), stainless and tool steel, titanium, and precious metals.
Compact budget-friendly SLM printers can be equipped with low-power lasers. Usually, the larger the size of the device, the more power and number of lasers it features. Some units are engineered with dozens of lasers 1 kilowatt each. As a result, the efficiency and productivity grow significantly, but so does the cost of the machine.
SLM 3D printers have an array of characteristics that should be taken into account when choosing proper equipment: power and number of lasers, diameter of laser spot, scanning algorithms and speed, layer thickness (usually from 20 to 120 microns), cooling system, etc.
When printing, the build chamber of an SLM printer is filled with inert gas - nitrogen or argon.
Upon completion of the process, the finished part can be removed from the build chamber after cooling. The latter can take up to several hours in case of large objects. The unused metal powder is collected, cleaned, and used for further printing.
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"SLM parts have higher tensile properties but cast parts are still stronger"
So in what way are cast parts stronger? Under compression? Sheer? Torsion?
Alternatively, what are these tensile properties that are higher, if not strength?
Can't wait until these become available for consumer use. I've been tempted a few times over the past year to buy a "cheap" one for like 20k.
You’d still need to be trained, and it’s not as easy as F3 (FDM) printing.
Train yourself
No you dont want to do this at home, the metal powder is hazardous.
@@hyuxionnot as hazardous as metal grain flow
so what is the actual difference between SLM and DMLS ?
None. SLM is a generic term, whereas DMLS is a term invented by the company EOS, mainly to differentiate itself from other printer manufacturers.
What's the price tag for those machines
The price of an organ in your body can be a good comparison
Hermiston Meadows
Good job.
Thank you!
You forgot EBM
Man if only NASA got one of these… think of all the lives saved if they had a reliable part manufacturing system.
wrong they have normal 3d printer, this only would make them mad, and also no gravity dumb dumb.
they probably have over a dozen
wrong he lies, powder cant be used again it lost all its properties after print. Which means its dumped into landfill. models brake, warp if they did not get proper heat, the sweeper can simply brake your model and than its the end of your money and many many more problems, printers come with badly made sweepers or even cheap lasers.....
How is powder not hit by the laser affected, and what properties are lost?
WTF are you talking about? Take a video of those "problems" happening on your SLM printer so we can see your experience.
Can anyone suggest a 3d metal printer for a home based business ?
great!