DED 3D Printing for Large-Scale Metal Projects

What is Direct Energy Deposition?

Direct Energy Deposition (DED) is a sequence of several similar metal 3D printing technologies that prints parts by melting and fusing material as it is deposited.

While it can be used to manufacture new parts, DED 3D Printing service is primarily used for repairing and rebuilding damaged components. 

How does DED work?

• Start with 3D modelling of the object to be printed
• Then send it to a slicing software, also called slicer, which will cut it according to the successive physical layers of deposited material.
• The slicer will transfer all information to the 3D printer, which starts its manufacturing process accordingly.
• Then the material, which comes in either metal powder or wire form, is pushed through a feed nozzle.
• Then, melted by a focused heat and successively added onto the build platform.
• The heat source and feed nozzle are mounted on a gantry system or robotic arm.
• The process usually takes place in a hermetically sealed chamber filled with inert gas to better control the material properties and protect the material from unwanted oxidation.
• A 5-axis arm with a nozzle moves around a fixed object.
• Material is deposited from the nozzle onto existing surfaces of the object provided earlier in wire or powder form.
• Then the material is added layer by layer and solidifies, creating or repairing new material specifications on the existing object.

Watch: https://www.youtube.com/watch?v=oPMjaYWM0X0 

What are the materials supported by DED?

DED 3D Printing in India supports a wide range of metals, including:

• Titanium alloys
• Stainless steel
• Tool steels
• Aluminium alloys
• Refractory metals (tantalum, tungsten, niobium)
• Superalloys (Inconel, Hastelloy)
• Nickel Copper
• Other speciality materials, composites and functionally graded materials

What are the advantages of DED 3D Printing?

• Ideal for repairing parts
• Grain structure can be controlled to a high degree
• Larger 3D printed parts printed with ease
• High printing speed
• Less material wastes.
• Multi-material capabilities
• High-quality metal parts
• Hybrid manufacturing capabilities

What are the disadvantages of DED 3D Printing?

• Low resolution
• No support structures
• Expensive
• Finishes are not of best quality and may require post processing to achieve desired effect
• Limited material use
• Fusion processes require more research for further advancement

What are the applications of DED 3D Printing online?

• Used in aerospace industry
• Used in oil & gas industry
• Used in defence industry
• Used in marine industry
• Used for architecture
• Used for satellites
• Used for military aircraft
• relatively fast
• Used for commercial aircraft 
• Used for repairing damaged parts
• Used to produce components like turbine blades
• Used to modify parts 

Selecting the Right Programming CAM Software 

In manufacturing, “hybrid” commonly describes the combination of machining and online 3D printing metal. Many hybrid systems comprise a milling machine or lathe equipped with a directed energy deposition (DED) head for depositing metal powder or wire. DED 3D Printing in India is one of many additive manufacturing processes, but it is not new.  At a high, abstract level, DED 3D Printing service creates a melt pool and adds material to an existing component, such as welding two parts together.  However, today we make DED 3D Printing service in India new by combining it with subtractive machining and automating the process, which improves control and moves applications beyond welding parts.  It is easy to imagine the challenges manufacturers of 3D Printing companies faced when they started to control the milling process using computers.  After much development, manufacturers have learned a lot about this topic, and the knowledge base is now substantial.   However, computer-aided DED online 3D Printing processes are still in their first iterations, and manufacturers are in the discovery phase with much to learn. Following is an overview of some hybrid AM applications, including mold repair, mold modification and composite molds. For each of these applications, the additive process will not necessarily happen on a flat area of the mold, which is where the DED online 3D Printing process has an advantage over the powder bed fusion additive manufacturing process.  

Mold Repair

Molds often have to be repaired or reworked during their production life, and the DED 3D Printing Bangalore  can be of great help for this purpose.  Adding material precisely where it is required and then re-machining the part in a single setup can now be achieved with one system.

Mold Modification

Manufacturers of 3D Printing companies in India are increasingly interested in modifying their old tooling to produce the next generation of parts after a design change. 

Composite Molds

Some manufacturers are starting to use the DED affordable 3D Printing service because of its unique ability to generate a composite metal structure: one single part made of different alloys.  For example, it’s possible to deposit material with high thermal conductivity properties on standard mold steel to reduce the part cooling time in the critical areas of the mold. To get started, you must first establish the type of equipment that will incorporate the process of DED online 3D Printing India. Machine tool manufacturers have started to offer dedicated machines for the DED 3D Printing online process that also feature lasers and powder delivery systems for the additive process. Watch: https://www.youtube.com/watch?v=kZjlUDPaAzg

Software Solution

Next, and the focus, is to determine which tools you need in your CAM strategy to properly support efficient hybrid processing with simultaneous additive and subtractive processing on one machine. For example, choose software that enables users to perfectly program cladding and milling together, true-to-detail additive and subtractive simulation and stock tracking between the individual process steps to guarantee the utmost reliability. It is essential to answer these three questions before selecting programming CAM software for the DED process and to consider the following factors before you make your CAM purchase:

1. Is the software capable of working within a hybrid process?
2. Are you able to create machining and additive operations in the same programming environment? 
3. Does the software allow for keeping track of the stock between different types of operations? The ability to generate stock is essential during an additive and subtractive process. It is used to contain the tool path and minimize motion in air, and also is used for collision check with the tool assembly. The stock condition is changing throughout the additive and subtractive processes of a hybrid operation.

Simulation: While it’s true that there is software specialized in simulation, it’s always better to have the part correct the first time as a result of working directly from CAM software, instead of going back and forth between CAM and simulation software.  For example, when using additive manufacturing, the software should be able to display the build during the simulation to ensure that the process is building the workpiece correctly. Some CAM software offering DED 3D Printing quote options do not offer this capability. This information should also be used by the CAM software to check possible collisions with the additive device itself as well as with the machine component.  This is especially important when performing five-axis motions during the build process. Five-axis machining: Five-axis machining capability is essential for the DED 3D Printing Bangalore process because the deposition process must occur normal to the area on which the machine deposits the material.  As previously mentioned, the DED online 3D Printing Bangalore will most likely not happen on flat surfaces, so five-axis capability is vital.  Another reason why five-axis is critical is that the additive device might need to be tilted to avoid existing features or to reach some areas. The role CAM software has in the five-axis process is also very significant.  While smoothness of the five-axis motions is a big factor in machining performance and part surface quality, it is also critical for DED online 3D Printing services because if the motions are not smooth, the machine will not be able to maintain its speed, causing the additive process to over-build or over-heat. Post processors: All post-processor technologies are not the same.  If you intend to perform complex five-axis motions with an expensive machine tool, you should work with a trusted solution that is proven to be safe, as there are enough variables associated with every new process.  Also, ensure the post-processor is prepared to transport the DED 3D Printing online technology information to the machine.  Lastly, carefully consider your software source. Since computer-aided DED 3D Printing service is new, users might encounter unexpected issues, so it is essential to consult with a knowledgeable software supplier.  Before choosing that supplier, ask about the team’s experience with additive manufacturing, assess their willingness to find solutions and inquire about existing partnerships they have with machine tool manufacturers who are involved in the research and development of additive technology.

Conclusion:

DED 3D Printing in India benefits industries that require the creation or efficient repair of high-value equipment in numerous ways and bespoke metal parts, especially those of a larger size. In future the scope of 3D printing technologies is predicted to increase, specifically due to the exciting trend of hybrid manufacturing. Through integration with conventional manufacturing technologies, DED online 3D Printing India could bring advances to industries on the lookout for innovative and cost-effective production opportunities.

Read More: Think Big, Print Big: DED 3D Printing for Large-Scale Metal Projects