introduction manufacturing processes © 2013 su-jin kim gnu manufacturing processes manufacturing...

IntroductionIntroductionManufacturing ProcessesManufacturing Processes

© 2013 Su-Jin Kim GNU© 2013 Su-Jin Kim GNU

Manufacturing ProcessesManufacturing Processes( 기계공작법 )

IntroductionIntroduction( 서론 )

Associate Professor Su-Jin Kim

School of Mechanical EngineeringGyeongsang National University



What is Manufacturing?• Manufacturing( 제조 ) is the process of converting raw

materials( 재료 ) into products( 제품 ).• Nations with largest GDP growth concentrated on high value-

added products, such as automobiles and machinery.

Powder BreadManufacturing?



What did we make?

Paper Mask Paper+Bamboo Kite Pet bottle Rocket

Chopstick Gun Paper+Bamboo Airplane

Who to make it?

Manufacturing Process



Materials

The types of materials( 재료 ) generally used in manufacturing:

1. Metals : Steels, Aluminium, copper2. Plastics3. Ceramics4. Composite materials ( 복합재료 )



Metals

• Iron (Fe): Cast iron, Steel, Carbon steel, High strength steel, Stainless steel, Tool steel

• POSCO: http://www.posco.com -> Products and Technology

• Copper (Cu), Brass (Cu+Zn,Zinc), Bronze (Cu+Sn,Tin)• Aluminum (Al), Duralumin (Al+Cu+Mg+Mn)• Lead, Titanium, Nickel, (Zinc), Gold, Silver



Polymer (Plastic)

• Thermoplastics: Nylon, Polyethylene, Polystyrene, Vinyl• Thermosets: Epoxy, Phenolic, Polyester• Elastomer: Rubber



Composite

• Reinforced plastics, Concrete (Cement + Sand), Concrete-steel wire, Wood, Polywood, Polymer matrix

• FRP, Glass reinforced plastic, Carbon reinforced plastic



Ceramics

Ceramics• Clay, Glass (SiO2), Diamond (C), Alumina (Al2O3),

Semiconductor (Si+P+B)



Material property ~ Process• Melting temperature ~ Casting• Harness ~ Machining, Grinding• Toughness (Ductile-Brittle) ~ Forming• Electric property ~ EDM, Welding

Properties Metal Plastic Ceramic

Melting temperature 1,000℃ 200℃ 3,000℃

Strength 400MPa 10MPa -300MPa, +50MPa

Toughness Ductile Ductile Brittle

Hardness High Low Very High

T. E. conductivity High Low Low

Stiffness (=E) High Low High

Chemical stability Mid High Very high

Density High Low High

Price High Low High



Melting temperature°C Ceramics Metals Polymers Composites

4000

Graphite

Tungsten 3400

3000 SiC

MgO

Al2O3 2052

2000 Silicon Platinum Cermets

Iron 1500, Ti

Copper

1000 Gold, Silver

Al 660, Mg

Zinc, Lead PE, PS FRP



Material & ProcessMaterials Process Products

MetalsMachiningFormingCasting

AxisCrank armEngine housing

Plastics Injection molding Toy

Ceramic Sintering Terning insert

Joining processesWeldingMechanical assembly

ShipCar

Silicon Deposition, Etching Memory



Manufacturing Process

Market &Specification

ConceptualDesign

Design forManufacture

Unit ManufacturingUnit Manufacturing

Assembly andJoining

Assembly andJoining

•Machining•Injection molding•Casting•Stamping•Chemical vapor deposition

•Welding•Bolting•Bonding•Soldering

ProductSell

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