3d printing presentation genteral .pptx

3d printing

1. 3D printing GOPI V – 111717114038 4 th year A sec

2. Introduction: 3D printing is a form of additive manufacturing technology where a three dimensional object is created by laying down successive layers of material. It is also known as additive manufacturing. 3D printing is achieved using an additive process, where successive layers of material are laid down in different shapes. It brings digital object (its CAD representation) into physical form by adding layer by layer of materials

3. History of 3D printing: Technology for printing physical 3D objects from digital data was first designed by Charles Hull in 1984. He named the technique as stereo lithography and obtained a patent for the technique in 1986. By the end of the 1980s , other similar technologies such Fused Deposition Modeling (FDM) and Selective Laser Sintering (SLS) were introduced.

4. How it works: A visual design of the object is created . CAD (Computer Aided Design) uses a 3D modelling program or 3D scanner for virtual design. The software slices the final model into hundreds of horizontal layers. The printer creates the object layer by layer , resulting in one three dimensional object. The amount of material , the rotation of the platform , and the design of the object is controlled via graphic design software,

5. Work flow: Pre-process: Process: Post process: CAD 3D models Specialized software 3D printer Powder removal Heating

6. Applications: Rapid prototyping : Prototyping is a cycle that producers or designing teams make models for end users to test , evaluate , or debug, and get feedbacks then revise or redesign at the pre-production. Saves time and cost. Personal printing: For about a thousand dollars can to buy the RepRap kit and put together their own personal 3D printer, complete with any desired customizations. What really speeds the development is the open source idea. Everybody working on the RepRap kit shares their knowledge so other people can use it and improve it again.

7. Challenges: Cost: june 2011- The current cost for a personal printer is S1200, The cheapest Commercial printers can be commissioned at $30I,000 Inability to easily print in multiple materials on the same machine: Particularly plastic, metal and conductive material. The colours are a touch dull and matt finish only A decent standard for model design: The current standard STL. files have some limitations. July 2011 -A new standard has been proposed the AMF file format , but at this stage it is not well known or well ued . Speed: Printing is slow. It takes a long time to build even the small piece. Most video you see are speed up or cut so you are not sitting there for an hour while you build a tap washer. Aug 2011 - The Ultimaker is .able to print much faster than Makerbot now.

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