Connecting rod

2008013374 Park Bum Jin2008013405 Lee Dong Hun

Intro

Converted into the rotating mo-tion of the crankshaft to be con-nected to the linear energy of re-ciprocating piston engine parts

Material

Endure compressive strength, tensile, and bending

Need strength, stiffness and reducing weight

Used chrome-molybden steel, through the description of the above

Manufacturing Process

Raw material Impression-die forging Annealing Rolling(Flat, Structural shape) Machining Heat treatment Grinding

Raw Material

Steel(Carbon 0.25~0.35%)

Chrome : 0.8~1.1%

Molybden : 0.15~0.25%

Manganese : 0.4~0.6%

Impression-die forging

Annealing & Rolling

Flat rolling Structural shape rolling

Machining & Heat treatment

Machining & Grinding

Reduce surface rough-ness

Increase accuracy

Heat treatment(Tempering)

Quenching is increase strength but occur brittleness

Tempering over 200˚Creduce brittleness