4th Seminar RapidPrototyping Senior Seminar Ahmedawad

43
Rapid Prototyping

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Transcript of 4th Seminar RapidPrototyping Senior Seminar Ahmedawad

Page 1: 4th Seminar RapidPrototyping Senior Seminar Ahmedawad

Rapid Prototyping

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Contents

• Manufacturing Process Classification

• Technologies

• Process Cycle

• Advantages

• Applications

• Comparison

• Applications

• Conclusion

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Manufacturing Process Classification

Consolidation

Subtractive

Additive

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Rapid Prototyping

The term "rapid prototyping" is a relatively

new expression for the generation of three-

dimensional models manufactured without

the need for machining or tooling.

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Applications

• Rapid prototyping

• Rapid tooling

• Rapid manufacturing

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Rapid prototyping

http://ccmodels.com/index.html

Prototypes for visualization, form/fit testing, and

functional testing

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Classic construction models

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Rapid tooling

Molds and dies fabricated using additive

processes

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Rapid manufacturing

Low-to-medium volume production runs of

end-use parts

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Process Cycle

3D solid modeling

Slicing the part

Fabrication of the part

Post processing

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• Create CAD model - For all additive

processes, the designer must first use

Computer-Aided Design (CAD) software to

create a 3-D model of the part.

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• Convert CAD model into STL model -

Each form of CAD software saves the

geometric data representing the 3-D

model in different ways.

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• Slice STL model into layers - Using

specialized software into thin cross

sectional layers

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• Build part one layer at a time - The

machine builds the part from the STL

model by sequentially forming layers of

material on top of previously formed

layers.

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• Post-processing of part - After being built,

the part and any supports are removed

from the machine

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Advantages

• Speed.

• Part complexity

• Low-volume

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Technologies

Liquid-based processes 1

• Material used: Photopolymer

• Example: Stereolithography (STL)

Powder-based processes 2

•Material Used: powders of polymers, metals, or ceramics

Example :Three Dimensional Printing (3DP(

Solid-based processes 3

• Material used: paper

• Example: Laminated Object Manufacturing (LOM)

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Stereolithography (SLA)

• Material type: Liquid (Photopolymer)

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Stereolithography (SLA)

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• Time to complete a single layer :

𝑇𝑖 =𝐴𝑖

𝑣 + 𝐷+ 𝑇𝑟

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Laminated Object Manufacturing (LOM)

• Material type: Solid (Sheets)

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Laminated Object Manufacturing (LOM)

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Three Dimensional Printing (3DP)

• Material type: Powder

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Three Dimensional Printing (3DP)

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Comparison

• Material

• part size

• Surface finish

• Accuracy

• Time

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SLA 3DP LOM

Material typeLiquid

(Photopolymer)Powder Solid (Sheets)

MaterialsThermoplastics

(Elastomers)

Ferrous metals

such as

Stainless steel;

Non-ferrous

metals such as

Bronze;

Elastomers;

Composites;

Ceramics

Thermoplastics

such as PVC;

Paper;

Composites

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Tensile Strength

55

35

19

SLA LOM 3DP

Str

es

s (

MP

a)

technology

Tensile Strength

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Hardness (Shore D)

8678

62

SLA LOM 3DP

Hard

ne

ss

(S

ho

re D

)

technology

Hardness (Shore D(

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Max part size

0.2307

0.7872

0.5619

SLA LOM 3DP

Vo

lum

e (

m^

3)

technology

Max part size

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0.127

0.25

0.33

SLA LOM 3DP

Th

ick

ne

ss

(m

m)

technology

Layer Thickness

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SLA LOM 3DP

Surface finish Smooth Rough Rough

Accuracy Best Average Fair

Time average fast Very fast

Water, chemical

resistance Poor Best Poor

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SLA LOM 3DP

Form/fit testing,

Functional testing,

Rapid tooling

patterns,

Very detailed parts,

Presentation models,

Form/fit testing,

Less detailed parts,

Rapid tooling patterns

Concept models,

Limited functional

testing

industrial models,

Consumer goods

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Applications

In 2011 University of Southampton engineers at

the University of Southampton in the UK have

designed, printed, and sent skyward the world’s

first aircraft manufactured almost entirely via 3-D

printing technology

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Conclusion

• Now the time has come where, the design

engineer just can imagine the new design

and within the few minute the product will

be ready with this technology (prototyping)

• Research & Development Engineers

developing new shapes, size, design, type

of various component for the establishing

machine or product