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  • A Technical Seminar on 3D- PRINTINGFor B.E. (Mechanical Engineering)

    Mandar Gadkari(III B)

    Under the Guidance of Prof . Praful Shirpurkar

    Dept. of Mechanical EngineeringDr. Babasaheb Ambedkar College of Engg. & ResearchSession : 2014-15

  • 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 rapid prototyping, is a mechanized method whereby 3D objects are quickly made on a reasonably sized machine connected to a computer containing blueprints for the object. This revolutionary method for creating 3D models with the use of inkjet technology saves time and cost by eliminating the need to design; print and glue together separate model parts. The basic principles include materials cartridges, flexibility of output, and translation of code into a visible pattern.

  • HOW DOES IT WORKProcessing:

  • Working Principle

  • First super fine stainless steel powder is put into the box of 3D printer, Then the machine spread the a layer of stainless still powder on the platform where 3D object is to made , tubes carry a binding substance from container to machines print head. The binder acts like a weak glue and it is ejected in very narrow jets by the print head. As the print head head moves back and fourth on stainless steel powered bed ,it eject glue on exact location specified by the computer .As the layers printed by print head goes on finishing, a powerful heater attached above the print head ensures the layer is completely dry. A roller applies a new thin layer of powder and the 3D printer applies binder to it, this builds the object from bottom up. Thus the process goes on for several hours . Once the layering is done the box in 3D printer is taken to oven where it is heated for particular time period as required, this will evaporate all the moisture present and make binder bond strong , After that the remaining powdered is vacuum out and the object emerges out. The cleaning action is performed on the object very carefully as the object is still fragile and can be crushed with bare hands

  • In this process arrangement is made to infuse brass with the object prepared by performing moulding and casting like process in which sand is not ,but a substance which will give support to object prepared also not interfere or react with brass ( Alumina oxide grit , may vary according to the type of metal used ). Then the object is taken to a furnance where it will be heated to 2000 F up to 24 hours, this melts the bronze which get suck upped to object like water by sponge . Infused with bronze the object is a solid metal ,thus object is ready can be polished or coated by gold to match any demand .the 3D metal printer can make various design with great accuracy and in very less time .

  • APPLICATIONS

  • CAPABILITIESAs anticipated, this modern technology has smoothed the path for numerous new possibilities in various fields. The list below details the advantages of 3D printing in certain fields.Product formation is currently the main use of 3D printing technology. These machines allow designers and engineers to test out ideas for dimensional products cheaply before committing to expensive tooling and manufacturing processes. In Medical Field, Surgeons are using 3d printing machines to print body parts for reference before complex surgeries. Other machines are used to construct bone grafts for patients who have suffered traumatic injuries. Looking further in the future, research is underway as scientists are working on creating replacement organs.Architects need to create mockups of their designs. 3D printing allows them to come up with these mockups in a short period of time and with a higher degree of accuracy.3D printing allows artists to create objects that would be incredibly difficult, costly, or time intensive using traditional processes.

  • COMPLEX STRUCTURE3D-Printers are very helpful in creating complexarchitectural structure.

  • MEDICAL USELaura Olivieri, a pediatric cardiologist at the Children's National Medical Center in Washington DC (which spent $250,000 on the 3D printer) says that these replica hearts are ideal for dry runs of complex operations, allowing the surgeon to see beforehand the exact anatomical landscape they will have to navigate.

  • New technologies using Unmanned Aircraft Vehicles (UAV) could create a new, cost-effective and reliable monitoring service. Researchers at University of Southampton, UK have created a new 3D printed drone, called 2Seas, that could soon be used by maritime security organizations. The heart of 2Seas the central wing box, fuel tank and engine mountings was 3D-printed, the wings and tail are made from carbon fiber.

  • ADVANTAGES RAPID PROTOTYPING: 3D printing gives designers the ability to quickly turn concepts into 3D models or prototypes (a.k.a.,rapid prototyping).

    Clean process. Wastage of material is negligible.(oral ..)

    Complex shape can be produced .

    EASY TO USE No skilled person needed.

    REDUCE DESIGN COMPLEXITY

    CHEAP Cheaper process than any other process.(oral)

    People in remote locations can fabricate objects that would otherwise be inaccessible to them.

  • DISADVANTAGESProcess is slow.Limited material use 3-D printers are still expensive.Size hurdle

    Although 3-D printers have the potential of creating many jobs and opportunities, they might also put certain jobs at risk .

    Misuse of technology-3d PRINTER ARE USED EXTENSIVELY FOR MAKING AMMO LIKE GUNS.

  • IN FUTUREWith today's 3D printers, if you lose your TV remote's battery cover you can print a replacement battery cover. With tomorrow's, if you lose your remote, you'll be able to print a new remote.

    3D printers are always getting cheaper and better.

    There is currently research going on to create 3D printers that could print out organs for people in need of a transplant.

    Within a decade, 3D printers will become commonplace in houses.

    The benefits of such technology are endless.

  • COSTS OF 3D PRINTERS

  • en.wikipedia.org/wiki/3D_printingHow the stuffs work:- http://computer.howstuffworks.com/3-d-printing.htmMakerbot:- http://www.makerbot.com/http://www.3dprinter.net/reference/what-is-3d-printing

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