This document discusses additive manufacturing (AM), also known as 3D printing. It begins with an introduction to AM and its ability to manufacture 3D objects from CAD data in a layer-by-layer process without design limitations. The document then covers the basic principles of AM including modeling, printing, and finishing. It discusses various AM processes like fused deposition modeling, selective laser sintering, and stereolithography. Advantages of AM over machining are provided along with applications in industries like automotive and aerospace. Barriers to AM adoption like slow build rates and high costs are also mentioned.

1. ADDITIVE
MANUFACTURING
SAURABH SONKER
B.Tech.
Mechanical engineering

2. TOPICS TO BE DISCUSSED :
• INTRODUCTION
• BASIC PRICIPLE OF AM
• TYPES OF AM PROCESSES
• AM VS MACHINING
• ADVANTAGES & APPLICATIONS
• BARRIERS

3. INTRODUCTION
“ADDITIVE MANUFACTURING” REFERS TO
OF MANUFACTURING 3D OBJECTS FROM CAD
DATA IN A LAYER BY LAYER METHOD.
GENERALLY KNOWN AS 3D PRINTING.
• IT IS PRESENTLY ONE OF THE MOST ADVANCE
TECHNOLOGY USED FOR MANUFACTURING WITHOUT
ANY DESIGN LIMITATIONS.
• USING AM ANY SHAPE AND GEOMETRY CAN BE
MANUFACTURED EASILY AND ACCURATELY.

4. BASIC PRINCIPLES OF AM
1) Modelling
2) Printing
3) Finishing
Flowchart

5. 1.) Modelling
a.) Creation of CAD model using:
• Using CAD package ( e.g. CATIA,
SOLIDWORKS, AUTODESK)
• 3D scanner
b.) conversion to .STL format :
• 3D models are converted printing
software readable format.

6. 2.) Printing
a.) Processing .STL file in slicer
• Using slicing software like
CURA,MESHMIXER
• SLICING model into series of thin layers
• Produce G-Code file.
b.) Layer by layer construction in 3D
printer.

7. 3.) Finishing
a.) Removing manufactured part from
machine
b.) Removal of extra material such as
supports.
c.) Minor cleaning, surface treatment,
painting if required.

8. AM Types
1. Fused Deposition Modelling (FDM)
• Based on Material Extrusion technique
• Material is drawn through a nozzle, where it
is heated and is then deposited layer by
layer
• Layers are fused together upon deposition
as the
material is in a
melted state.

9. 2. Selective laser sintering (SLS)
• Based on Powdered Bed Fusion
• Roller spread powdered layer of
material each time it passes
• Laser fuses the powdered material
layer by layer
• Process repeats until the entire model
is created.

10. 3. Stereolithography (SLA)
• Based on photo polymerization
• Photo reactive resin is solidified by
using UV laser
• Platform get lowered by layer
thickness each time
• High resolution of details can be
obtained

11. AM VS MACHINING

12. ADAVANTAGES
• Freedom of design
• Potential elimination of tooling
• Lightweight design
• Elimination of assembling steps
• No Need for manufacturer skills
APPLICATIONS
Used in many industries for rapid prototyping or for
reverse engineering or for innovation in:
• Automotive
• Aerospace
• Biomedical
• Consumer goods and many others

13. BARRIERS - DISADVANTAGES
• Slow build rates
• High production costs
• Considerable effort for design optimisation
• Discontinuous production process
• Limited component size.