There are seven additive manufacturing technologies that can be inserted into your plant. In this article, we will compare the two most efficient ones: DED and PBF.
To do this, we will look at each one separately, as we will highlight their advantages and disadvantages. Let’s hope it makes it easier for you to choose the right acquisition for your manufacturing site.
What is Metal Additive Manufacturing Technology?
This technology enables manufacturers to create objects of any size and complexity through metal 3D printing. It is based on information sent from a computer, which is then reproduced Metal Addition Manufacturing Machine. The technology varies, but it usually refers to fine metallic powders, one layer at a time, on top of each other, combining between them when using a bonding agent.
DED – Directed energy accumulation
How does it work?
DED is the process of material fusion, because it melts the metal when it is deposited. It uses powder or a wire on which it focuses strong energy (often a laser). The metal is coming out of a nozzle, which can go in any direction, to create the part it is working on. It works well for repairing or adding components, but also for creating something completely new. It can be compared to casting. However, the important difference is that DED Addition production The process can produce extremely fine details, which cannot be welded.
There are three categories of direct energy deposition, which are defined by the energy source they use. These are: Lens (Laser Engineered Net Shaping), EBAM (Electron Beam Additive Manufacturing) and WAAM Wire Arc Additive Manufacturing.
Advantages of DED
This is one of the most convenient processes in terms of time and cost for each part, as it works quickly and does not waste a lot of material. It can be used with a variety of materials, which helps to reduce the cost to your liking. It is often used when working on large pieces and when corners are difficult to reach. Finally, the results are dense and strong.
Disadvantages of DED
Acquiring material can be expensive in the beginning. The liquid melting pool, where the process takes place, does not allow overhang. Also, it may require post-processing, once the work is done, because DED’s process resolution is not optimal.
PBF – Powder Bed Fusion
When you use a PBF machine, you can selectively fuse the areas of a powder bed, using a power tool to melt or sint the powdered material. It works by creating a sheet of material on top of the part. Before the laser or electron beam melts everything together, it reaches the melting point and spreads its need evenly everywhere. In the PBF process, an inert gas is used inside the near-zero chamber. It is meant to protect the working object from oxidation and corrosion.
There are seven different types of powder bed fusion depending on the power source used: Selective Laser Centering (SLS), MJF (by HP), Selective Laser Melting (SLM), Direct Metal Laser Centering (DMLS), Electron Beam Email ), Selective heat centering (SHS), high-speed centering (HSS).
Advantages of PBF
PBF is often compared to machining and casting because of the mechanical properties of metal parts. Through this process, you can create very complex objects in terms of size. To do this, you can even use different materials on each piece. In the end, the parts that come out are very strong. You do not need any physical support to build and many parts can be made at the same time. If you prefer, you can work with plastic or add metal construction materials during the process. After all, the powder it uses is often recyclable.
Disadvantages of PBF
This is not the least expensive process in metallurgical manufacturing technology. This is because the printing time is quite long and you will often need post-processing before the part is complete. In fact, the result will show different quality textures on the surface. It requires a lot of electricity to work. Finally, a potential thermal deformation can occur.
One process is not better than another. These are both great technologies that make good, hard metal parts. The choice you have to make depends on what you are making at your plant and what your priorities are. In both cases, you will be satisfied with the end result and so will your clients.