What is Additive Manufacturing?
Additive Manufacturing is an appropriate name to describe the technologies that build 3D objects by adding layer-upon-layer of material, whether the material is plastic, metal, concrete or one day…..human tissue.
Common to AM technologies is the use of a computer, 3D modeling software (Computer Aided Design or CAD), machine equipment and layering material. Once a CAD sketch is produced, the AM equipment reads in data from the CAD file and lays downs or adds successive layers of liquid, powder, sheet material or other, in a layer-upon-layer fashion to fabricate a 3D object.
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What exactly does the Additive Manufacturing Describe? It’s simple, If you Know the conventional way of manufacturing a product, and i want to make a small stepped shaft using a lathe machine then what i do is I’ll take a circular billet with a diameter greater or equal to the highest measured diameter of the stepped shaft, using the lathe machine i’ll remove the material to reduce the shaft diameter to the required dimension, so what happens is that there is a removal of material from the parent metal, in this process there is a wastage of material to get the required product. Whereas in the additive manufacturing the product is made layer by layer using a 3D printer after designing the required shaft using any CAD modelling softwares. The printer prints the model in such a way that there is no wastage of the material, the interesting fact is that a laser beam sintered on the powdered metal and this process is done by using Selective Laser Sintering 3D Printer
The Following link explains about additive manufaturing
You can Know all about 3D printing in the following link