1. KAVITHA MOHAN S3ECE ROLL NO:41
3D PRINTING
KAVITHA MOHAN
S3ECE
ROLL NO:41

2. HISTORY 3D printing / Additive manufacturing
Process of making three dimensional solid objects from a digital file.
An object is created by laying down successive layers of material until the entire object is created.

3. GENERAL PRINCIPLES MODELING: PRINTING
with a computer aided design (CAD) package/or via a 3D scanner /via a plain digital camera and photogrammetry software
PRINTING
To perform a print, the machine reads the design and lays down successive layers of liquid, powder, or sheet material to build the model from a series of cross sections.
These layers, which correspond to the virtual cross sections from the CAD model, are joined together or automatically fused to create the final shape.

4. FINISHING
Though the printer-produced resolution is sufficient for many applications, printing a slightly oversized version of the desired object in standard resolution, and then removing material with a higher-resolution subtractive process can achieve a higher-resolution.

5. Methods of 3d Printing
Selective laser sintering (SLS) Laminated object manufacturing or LOM
Stereolithography (SLA)
Polyjet or Jetted Photopolymer (J-P)
Fused deposition modeling/fused filament fabrication (FDM/FFF)
Cladding or Laser Powder Forming or Laser Fusing
Laminated object manufacturing or LOM

6. SLS :uses a high powered laser to melt powder together
for musical instruments
SLA: A layer of fluid resin is hardened by UV or laser
no need for post-finishing.
PJ: extrudes a photopolymer which hardens with UV light.
can create rubber-like objects.
for creating one-piece string instruments
FDM: most seen 3d printing method
a plastic wire is molten and laid down in layers.
Inherently unsolid material, always has air-spaces and fuse lines

7. LPF: Instead of feeding the printing head a solid core of material, a powder is fed.
A method for making very detailed and small parts
LOM: Sheets of raw material are laid on each other, after which it will be cut out by laser or knife.

10. Biomedical Engineering:
APPLICATIONS
Biomedical Engineering:
Creating limbs and other body parts out of metal or other materials to replace lost or damaged limbs.
More accurate
Faster

11. Construction and Architecture
3D printing concept to create entire buildings

12. Product Prototyping
Allows designers to create and the next day see and touch their design
Earlier the process was tedious without 3D printing