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Additive Manufacturing Technology: A Review

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Referred to in short as AM, the basic principle of this technology is that a model, initially generated using a three-dimensional Computer Aided Design (3D CAD) system, can be fabricated directly without the need for process planning. Although this is not in reality as simple as it first sounds, AM technology significantly simplifies the process of producing complex 3D objects directly from CAD data. Other manufacturing processes require a careful and detailed analysis of the part geometry to determine things like the order in which different features can be fabricated, what tools and processes must be used, and what additional fixtures may be required to complete the part.

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Additive Manufacturing Technology: A Review

  1. 1. AGEND A Introduction​ Why Additive Manufacturing? Terms Used in Additive Manufacturing​ General AM Process Parameters of AM Process​ Benefits of AM Future of AM Summary 2
  2. 2. INTRODUCTION Additive Manufacturing is the formalized term for what used to be called Rapid Prototyping and what is popularly called 3D Printing. The term Rapid Prototyping (or RP) is used in a variety of industries to describe a process for rapidly creating a system or part representation before final release or commercialization. In other words, the emphasis is on creating something quickly, and that the output is a prototype or basis model from which further models and eventually the final product will be derived.
  3. 3. WHY ADDITIVE MANUFACTURING By now, you should realize that the technology we are referring to is primarily the use of additive processes, combining materials layer- by-layer. The term Additive Manufacturing, or AM, seems to describe this quite well, but there are many other terms which are in use. It discusses other terms that have been used to describe this technology as a way of explaining the overall purpose and benefits of the technology for product development.
  4. 4. TERMS USED FOR ADDITIVE MANUFACTURING 1. Automated Fabrication (Autofab) Computers and microcontrollers are used to control the actuators and to monitor the system variables. 2. Freeform Fabrication This is very different from most conventional manufacturing processes that become much more involved as the geometric complexity increases. 3. Layer-Based Manufacturing These descriptions relate to the way the processes fabricate parts by adding material in layers. This is in contrast to machining technology that removes or subtracts material from a block of raw material.
  5. 5. TERMS USED FOR ADDITIVE MANUFACTURING 4. Rapid Prototyping RP was found to significantly speed up this process, and thus the term was adopted. 5. Stereolithography or 3D Printing Both terms allude to the use of 2D processes (lithography and printing) and extending them into the third dimension.
  6. 6. GENERAL AM PROCESS STEP 1: CAD STEP 2: CONVERSION TO STL STEP 5: BUILD​ STEP 3: TRANSFER TO AM MACHINE AND STL FILE MANIPULATION​ STEP 8: APPLICATION​ STEP 7: POST-PROCESSING​ STEP 6: REMOVAL STEP 4: MACHINE SETUP
  7. 7. PARAMETERS OF AM PROCESS 1: MATERIAL 2: SPEED 5: GEOMETRY​ 3: COMPLEXITY 6: PROGRAMMING 4: ACCURACY
  8. 8. BENEFITS OF AM  It is one of the Disruptive technology.  Transfer to AM is relatively Seamless.  What you See Is What You Build (XYZ).  Complexity of parts to be built is generally performed in a single step.  Workshops can be much cleaner, more streamlined, and more versatile than before.  We do not really need to design the part according to how it is to be manufactured.
  9. 9. FUTURE OF AM  With improvements in AM technology, the speed, quality, accuracy, and material properties have all developed to the extent that parts can be made for final use and not just for prototyping.  The terms Rapid Manufacturing and Direct Digital Manufacturing (RM and DDM) gained popularity prior to the adoption of the term Additive Manufacturing to represent the use of AM to produce parts which will be used as an end product.  Certainly we will continue to use this technology for prototyping for years to come, but we are already entering a time when it is common place to manufacture products in low volumes or unique products using AM.
  10. 10. SUMMARY It would not be possible for AM to exist where innovations in areas like 3D graphics and Computer-Aided Design software is not available. This presentation highlighted some of the key moments that catalogue the development of Additive Manufacturing. It described how the different technologies converged to a state where they could be integrated into AM machines.
  11. 11. THANK YOU Vaibhav Wani Shreenathbhuvan.14@gmail.com

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