Additive Manufacturing I PDF

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

N. Sinha Department of Mechanical Engineering IIT Kanpur

 Additive Manufacturing (AM) refers to a process by which digital 3D design data is used to build up a component in layers by depositing material       







What You See Is What You Build (WYSIWYB) Process 

    !"#$  $  !$   %#$  

 

&   ! !'  (  Source: Gibson, Additive Manufacturing



Source: Gibson, Additive Manufacturing

 !

STL uses triangles to describe the surfaces to be built. Each triangle is described as three points and a facet normal vector indicating the outward side of the triangle, in a manner similar to the following: facet normal 4.470293E02 7.003503E01 7.123981E-01 outer loop vertex 2.812284E+00 2.298693E+01 0.000000E+00 vertex 2.812284E+00 2.296699E+01 1.960784E02 vertex 3.124760E+00 2.296699E+01 0.000000E+00 endloop endfacet Source: Gibson, Additive Manufacturing



Effects of building using different layer thicknesses Source: Gibson, Additive Manufacturing

"## ) *  #  !   +& ,- -  . + # / !0 , 1!2' -

Source: Gibson, Additive Manufacturing

Difference between various AM techniques?  3    #$  3  '  # $  !$  4# 0$  *  $  #$  

$

Source: Royal Academy of Engineering

$

Source: Royal Academy of Engineering

Source Google images

Current and Potential industries for Additive Manufacturing



%

Source: SAVING project/Crucible Industrial Design Ltd.; Roland Berger

%

Source: Roland Berger

%

Source: Roland Berger

&'!

Old toothbrush

Customization: •Bristle hardness •Colour •Handle Style and shape •Etc. New toothbrush

Laser scanner to input personalized data

Home 3D Printer



Source: Royal Academy of Engineering

($ #!)!* !!    !  ' !   !  - /      $    3     $    -      !!      $    !!  '  /  !  !

($ 5+" !    ! !    '#    # 0  !6 2 -# 7 4  !!     #      ! 58   96 51/    96 58# / # /   96

($   -  #  +"!  0/   : ! '  ! '0

($ $ ) -;  !  !        / #   '...