3D printers
•Als PPTX, PDF herunterladen•
3 gefällt mir•1,115 views
Get introduced to 3D printers like a professional.
Empfohlen
Weitere ähnliche Inhalte
Was ist angesagt?
Was ist angesagt? (20)
Andere mochten auch
Andere mochten auch (20)
Ähnlich wie 3D printers
Ähnlich wie 3D printers (20)
Mehr von Ardalan Amiri
Kürzlich hochgeladen
Kürzlich hochgeladen (20)
3D printers
- 1. Power pointed by: Ardalan Amiri Presenting by: Ardalan Amiri Hesam Omidi and Mohammad Darini
- 2. History Manufacturers have quietly used 3D printing technology — also known as additive manufacturing — to build models and prototypes of products over the past 20 years. Charles Hull invented the first commercial 3D printer
- 3. How it works CAD 3D Scanner Computer “STL” format file 3D printer
- 4. Practicality Several different 3D printing processes have been invented since the late 1970s Almost all of them are efficient only for small quantities and relatively small dimensions They can take several hours to several mounts to build a model Some of them can use multiple materials and colors simultaneously and/or sequentially
- 5. 3D printer markets Many companies offer 3D printing services or sell relatively cheap 3D printers that can cost just hundreds rather than thousands of dollars nowadays.
- 6. An example of non-industrial use 3D-Printed Reefs Could Rehabilitate Persian Gulf Ecosystem
- 7. Voxel (Volume + Pixel) The particles are around 50 to 100 μm (510 to 250 DPI (dots per inch)) in diameter
- 8. Additive processes types Extrusion FDM* Thermo Plastics Silicon Rubber Wire EBF3* Any Metal Alloys Granular DMLS* EBM* SLM* SHS* SLS* Laminated Any Metal Alloys Ceramics Aluminum, Stainless Steel Titanium Alloys Thermo plastics LOM* Paper, Metal foil, plastic film Light Polymerized SLA* DLP* Photopolymer High Tech Military use Oldest 1986 Fastest
- 9. Granular DMLS Method Precise and flexible Still under huge study and development Invested and used by universities Using almost any available 3D printing material Using Particle locating system Covers many sub-branches of 3D printing
- 10. Mechanical Friendly The most efficient 3D printing method for Mechanical Engineers. Directly build metal parts (expensive) Great choice to build moulds for further manufactures
- 12. Limits Imperfections in plastic materials Lack of accuracy in Z direction Needs powerful computer processors In demand for finishing process There are few numbers of famous companies ( patent for Germany and USA )
- 13. Stereo lithography (SLA) • excellent for composite materials • fast and accurate • Top-down process • The resin used in SLA is particularly sensitive to ultraviolet light, so it hardens once the UV laser hits it. • Novel mechanism
- 14. What happens next Once the process is finished, the newly created object is soaked in a solvent that helps cure the resin, the supporting structure is removed, and whatever excess resin is scraped off. Some machines require the “printed” item to be baked in an ultraviolet oven to guarantee its solid state
- 16. can produce parts with a maximum size of approximately 50×50×60 cm (20"×20"×24")
- 17. Other side of facts The resin alone stands at around $100 to $200 per liter the cost of stereolithography machines ranges from $100,000 to more than $500,000 The less resin the poorer Voxel The commercial types suffer from lack of reliability
- 18. References [1] H.Lispon and F. C.Moon and J.Hai and C.Pavent i , “ 3-D Pr int ing the History of Mechanisms ” . Journal of Mechanical Design , Vol . 127, pp. 2-3, 2005. [2] E.Maravelakis and K. David and A. Antoniadis and A.Manios and N. Bi lal is and Y.Papahar i laou, "Reverse engineer ing techniques for cranioplasty: a case study " , Journal of Medical Engineer ing & Technology, No. 1, pp.2 - 7, 2007. [3] “Technology Quat rer ly, ” Proc. Int . Conf . The Econome. China, 2009, pp. 3-5. [4] 3D Pr inter " , Nov 2011, Avai lable At : Ht tp: / /www.wikipidia.org/3dprnters.html [5] Z Corporat ion 3D Pr int ing Technology Fast , Af fordable and Uniquely Versat i le" , Dec 2011, Avai lable At :Ht tp: / /www.zcorp.com/documents/1083D Pr int ing Whi te Paper FINAL.pdf [6] Open 3D Pr int ing and Open Hardware" , J.crack , Dec 2011, Avai lable At : Ht tp: / /www. jmccrack.com/ Open 3D Pr int ing and Open Hardware.pdf [7] " Objet260 Connex " , Nov 2011, Avai lable At : Ht tp: / /www.Objet .com/Objet260 Connex open wi th Model .pdf
Hinweis der Redaktion
- Charles Hull invented the first commercial 3D printer and offered it for sale through his company 3D Systems in 1986. Hull's machine used stereo lithography, a technique that relies upon a laser to solidify an ultraviolet-sensitive polymer material wherever the ultraviolet laser touches.
- 3D printers work by following a computer's digital instructions to "print" an object using materials such as plastic, ceramics and metal. The printing process involves building up an object one layer at a time until it's complete. For instance, some 3D printers squirt out a stream of heated, semi-liquid plastic that solidifies as the printer's head moves around to create the outline of each layer within the object. The instructions used by 3D printers often take the form of computer-aided design (CAD) files — digital blueprints for making different objects. That means a person can design an object on their computer using 3D modeling software, hook the computer up to a 3D printer, and the watch the 3D printer build the object right before his or her eyes.
- The technology remained relatively unknown to the greater public until the second decade of the 21st century. A combination of U.S. government funding and commercial startups has created a new wave of unprecedented popularity around the idea of 3D printing since that time. First, President Barack Obama's administration awarded $30 million to create the National Additive Manufacturing Innovation Institute (NAMII) in 2012 as a way of helping to revitalize U.S. manufacturing. NAMII acts as an umbrella organization for a network of universities and companies that aims to refine 3D printing technology for rapid deployment in the manufacturing sector. Second, a new wave of startups has made the idea of 3D printing popular within the so-called "Maker" movement that emphasizes do-it-yourself projects. Many of those companies offer 3D printing services or sell relatively cheap 3D printers that can cost just hundreds rather than thousands of dollars.
- Artificial reefs created using 3D printing technology may be effective tools for restoring marine life in threatened ecosystems. A Bahrain-based organization, called Reef Arabia, is using 3D-printed reef formations to rehabilitate the waters of the Persian Gulf. Artificial reefs can help restore sea life by providing a base for corals and sponges to take hold. The waters off Bahrain's coast have suffered from overfishing, but Reef Arabia is hoping its 3D-printed formations will help revive the region's marine diversity. The group is designing artificial reefs printed using non-toxic sandstone material, which will give the formations a more realistic feel, said Reef Arabia team member David Lennon. "With 3D printing we can get closer to natural design because of its ability to produce very organic shapes and almost lay down material similar to how nature does it,“.
- Fused deposition modeling رسوب ذوب شده Electron Beam Free Form Fabrication اشعه ی الکترونی آزاد Direct metal laser sintering خاکسترسازی مستقیم فلز به کمک لیزر Electron-beam melting ذوب الکترونی Selective laser melting ذوب الکترونی انتخابی Selective heat sinteringذوب گرمایی انتخابی Selective laser sintering خاکستر لیزری انتخابی Laminated object manufacturingتولید چندلایه ای Stereo lithography Digital Light Processing