Presented by

VAISHAKH B S

130

S8MB

3-D PRINTING

FOR MASS

PRODUCTION

Guide

Dr. Suresh K S

Associate professor

Department of Mechanical Engineering

Outline

Introduction

History

How it work??

General principal

Different method of 3-d Printing

Manufacturing of PMMA cam shaft through rapid

prototyping technology

Conclusions

References

Introduction 3D printing is a modern technology in which 3 dimensional

objects are printed from digital data

Three dimensional object is created by laying downsuccessive layers of material

3D printing technology is also known as Additivemanufacturing, where an object is created by adding layerby layer

History

The 3D printing technology was first developed by Chuck

Hull in 1984

He named the technique as Stereo lithography and

obtained a patent for the technique in 1986

He also develop the STL format widely accepted for 3D

printing

Stages of 3D printing

Modeling

A 3D image of the item to be printed is produced

by using a Computer Assisted Design(CAD)

software.

The 3D model files should be exported to the 3D

printing machine in standard format .STL

The exported file will be a mesh(series of

triangles oriented in space)

Printing

The STL file exported will be processed using

slicing software.

KISSlicer( Keep it simple slicer), Slic3r is an

example of slicing software.

It cuts the model into horizontal slices (layers),

generates tool paths(G code files) for the

movement of print heads.

Printing of the model.

Finishing

The finishing work depends on the method which

the 3D model is manufactured.

Different Methods

• Stereo lithography

• Selective laser sintering (SLS)

• Fused deposition modeling (FDM)

Stereolithography Stereolithography is a 3D printing technology.

It employs liquid curable resign and an UV laserto builds parts.

Using the UV laser beam the first cross section ofthe STL file is drawn in to the vat of photopolymer resign.

The platform will be lowered so that the freshlayer of resin will cover the build surface

The next layer is traced out curing and bondingthe resin to the layer below

The process is repeated layer by layer until themodel is fully grown.

Selective laser sintering Selective laser sintering (DMLS) is an 3D printing

technique that create metal parts powders of metal,

alloy material such as stainless steel to create

models.

A pre-programed assembly will supply powder on the

base platform to create a uniform layer of powder.

A laser then draws a 2D cross section on the surface

of building material by heating and fusing the material

to a solid mass.

Then the base platform will be lowered

Then next layer of powder will be supplied

The process will continue till the model is completed

Fused deposition modeling (FDM)• FDM is a 3D printing technique that uses

thermoplastic materials to produce models.

• Thin thread like spools of thermoplastic andsupport material are used to create each crosssection of the product

• The materials will be slowly extruded through thenozzle.

• The nozzle will precisely place the material

• After finishing the first layer the base platform willbe moved down

• Process is repeated till the model is completed

Manufacturing of PMMA Cam

Shaft by Rapid Prototyping

RP is an additive manufacturing process in which

a three dimensional product or component is

produced from a three dimensional design using

computer aided design (CAD) software in a very

short period of time.

CAM shaft which produced through the existing

ways which requires a lot of power, space, cost

and time

Modification has to be done in SLS machine in

order to adapt for the mass production

The strength of the laser beam is

increased so increased amount of

material can be increased

They increase the number of laser tool

so that an increased amount of cam shaft

can be produced in a single layer

Under deep analysis they have selected poly(methyl methacrylate) PMMA instead ofconventionally used cast iron.

By using the 3D printing technology for theproduction of the cam shaft, it is able to gainthe following advantages,

(a) Increased productivity

(b) Less time

(c) Less space

(d) No wastage of the materials

SOME APPLICATIONS

Rapid manufacturing

Manufacturing through 3D printing found to be

less expensive than other manufacturing.

Advances in 3D printing technology have

introduced materials that are appropriate for final

manufacture

End use parts

3D printing is capable of building the most

durable, stable, and repeatable parts in the

industry, whose accuracy can be compared

with injection molding.

Medical field Printing organs such as kidney, fingers, etc

House printing

A chineese company winzoon built 10 houses in a

day using large 3D printers

Aerospace

Aerospace engineers rely on patented FDM

Technology for prototyping, tooling and part

manufacturing.

In September 2014, SpaceX delivered the first

zero-gravity 3-D printer

On December 19, 2014,NASA emailed CAD

drawings for a socket wrench to astronauts

aboard the International Space Station (ISS),

who then printed the tool using its 3-D printer

Conclusions3D printing technology has the potential for the

better manufacturing of products

3D printing has a lot of possible benefits to society,

although the products created must be regulated.

3D printing technology can be effectively used for

the mass production.

REFERENCES1.Manufacturing of PMMA Cam Shaft by Rapid Prototyping

2014

Jaiganesh .V, Andrew anthony christopher 1, MugilanE2

2. Progress in Additive Manufacturing and Rapid Prototyping

J.-P. Kruth , Katholieke Universiteit Leuven, Division PM,Belgium

M.C. Leu* (2), New Jersey Institute of Technolgy, Mech. Eng. Dept USA

T. Nakagawa (I), University of Tokyo, Inst. of Industrial Science, Japan. 3.Emphasizing the advantage of 3d printing technology in packaging design development and production in local industries

Dr. Rania F. Mohamed

Dr. Abeer S. Mahmoud

4.Wikipedia

5.youtube