Group work for EMM3583 Manufacturing Technology

1. MANUFACTURING ENGINEERING
(EMM 3583)
HIGH PERFORMANCES OF BOLT AND NUT
• MONISSRI RASAMANIKAM 2170178
• AZNEEN AWALLIAH BINTI MOHD AMIR SYAM 2170186
• UNGKU MUHAMMAD AMIN SAYYID BIN UNG MD SALLEH 2170188
• MUHAMMAD ZUL FAHMI BIN ZUL AZRI 2170203

2. WHAT IS BOLT AND NUT ?
• A bolt is an externally threaded fastener
which is primarily used as bolted joint with a
nut
• Nut is a small metal block with internal screw
thread to be fitted onto a bolt
APPLICATION

3. PROCESS OF MANUFACTURING BOLT AND NUT…
BOLT HEAD FORMED BY FORCING
THE STEEL INTO VARIOUS DIES AT
HIGH PRESSURE
MOLDING THE STEEL INTO THE
RIGHT SHAPE AT ROOM
TEMPERATURE
WIRE IS UNCOILED, STRAIGHTENED
AND CUT TO LENGTH
THREADS ARE FORMED BY ROLLING
OR CUTTING
THE BOLT IS EXPOSED TO EXTREME
HEAT TO HARDEN STEEL
SURFACE TREATMENT ARE
PROVIDED BASED ON ITS
APPLICATION. ZINC-PLATING IS
COMMON TO INCREASE
CORROSION RESISTENCE
AFTER QUALITY CONTROL TO
ENSURE UNIFORMITY AND
CONSISTENCY, BOLTS ARE
PACKAGED
COLD
FORGING

4. PROS AND CONS…
ADVANTAGES DISADVANTAGES
COLD
FORGING
• Mass production
• High volume bolts produced
• High accuracy
• Excellent surface quality
• High strength
• Simple shapes
• Less ductile
• Not suitable for every steel
• Limitation in size and shape
HOT
FORGING
• High ductility
• Excellent surface quality
• Low volume bolts produced
• Additional cost in production
• Less dimensional tolerance
MACHINING • Best for customized and intricated
shape
• Low volume bolts produced
• Low in strength
• Produces more scrap
• Less strength

5. COST OF PRODUCTION OF BOLT AND NUT…
COST EFFICIENCY OF COLD FORGING
• Raw materials can be directly purchased with
included annealing and peeling making it ready for
process.
• Raw material is limited, more expensive
• To minimize cost, cold heading wire preferred small
in size
• Efficient lubrication system guarantees high quality
of final product and eliminate additional cost
COST EFFICIENCY OF HOT FORGING
• Minimization of energy cost by using indicator and
billet with matching diameter
• Automatization of all forging presses essential for
the cost efficiency of the hot forging manufacturing
process, especially for industries that require high
volume production runs as the automotive
• All applied tools should be optimized for the
following innovative technologies:
(a) Metallurgy
(b) Reloading
(c) Heat treatment
(d) Surface treatment