8/2/2019 1 Intro Forming

1/8

Metal Forming(Pembentukan Logam)

Arif Rahman, ST, MT

8/2/2019 1 Intro Forming

2/8

Pembentukan Logam (MMS310803E) 2

todayandtomorrow.netproductioncars.com

dullmensclub.com amazon.co.ukgermes-online.com

Case of Coat Hanger & Car

8/2/2019 1 Intro Forming

3/8

Pembentukan Logam (MMS310803E) 3

Casting, etc

Initial shaping

Welding,

riveting etc Creating

subassemblies

Heat; surfacetreatment, etc achieving

certainproperties

Localseparation of

materials

Painting,Galvanising,

etc.

Applying thinlayer ofmaterial

Manufacturing processes as per DIN 8580(Metal Forming Handbook/Schuler, 1998)

8/2/2019 1 Intro Forming

4/8

Pembentukan Logam (MMS310803E) 4

Metal Forming

Alibaba.com

indiamart.com

Forging

alibaba.com

alibaba.com

matter.org.uk

alibaba.com

made-in-china.com

Extrusion

RollingSheet metal forming

Wire drawing

ThermomechanicalProcess

8/2/2019 1 Intro Forming

5/8

Pembentukan Logam (MMS310803E) 5

Principle

Rawmaterials

Initial shape

Simple forms

UsefulproductsMore complex shape

Change in properties

Final configuration

External Force

8/2/2019 1 Intro Forming

6/8

Pembentukan Logam (MMS310803E) 6

Classification (working temperature)

Hot working (0.6*Tm)

Advantages

Reduce

Defects/Discontinuities Improve Microstructure

Disadvantages

Poor Dimensional

Tolerance Material-Environment

Interaction

Poor Surface Appearance

Cold working (0.3*Tm)

Advantages

Good Surface Appearance

Good DimensionalTolerance

Improve MechanicalProperties

Material-Environmental

Interaction Disadvantages

Deformation Force

Complex Equipment

Ductility of Final Product

8/2/2019 1 Intro Forming

7/8

Pembentukan Logam (MMS310803E) 7

General Characteristics of Forming Processes

Process Characteristics

Rolling

Flat

Shape

Forging

Extrusion

Drawing

Sheet-metal forming

Production of flat plate, sheet and foil at high speeds;good surface finish, especially in cold rolling; very highcapital investment; low to moderate labour cost

Production of various structural shapes (such as I-beamsand rails) at high speeds; includes thread rolling; requiresshaped rolls and expensive equipment; low to moderatelabour cost; moderate operator skill

Production of discrete parts with a set of dies; somefinishing operations usually required; usually performed atelevated temperatures, but also cold for smaller parts; dieand equipment costs are high; moderate to high labour

cost; moderate to high operator skill

Production of long lengths of solid or hollow shapes withconstant cross-section; product is then cut into desiredlengths; usually performed at elevated temperatures; coldextrusion has similarities to forging and is used to makediscrete products; moderate to high die and equipmentcost; low to moderate operator skill

Production of long rod and wire with various cross-sections; good surface finish; low to moderate die,equipment and labour costs; low to moderate operatorskill

Production of a wide variety of shapes with thin walls andwith simple or complex geometries; generally low tomoderate die, equipment, and labour costs; low tomoderate operator skill

8/2/2019 1 Intro Forming

8/8

Pembentukan Logam (MMS310803E) 8

Tugas (PR)

Jelaskan proses-proses pembentukan logam (rolling,forging, dsb) serta berikan komponen-komponenapa yang umumnya dibuat dengan proses tersebut.

Kertas A4; margin kiri 4 cm, lainnya 3 cm; hurufTimes New Roman (12 pt), 1,5 spasi; maksimum 5halaman