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Hot and Cold Working

The document discusses various manufacturing processes involving hot working of metals. It describes processes like hot rolling, forging, extrusion and drawing. Hot rolling involves passing hot metal between rollers to reduce thickness. Forging involves shaping metals using dies or hammers while they are hot. Extrusion uses a punch to push hot metal through a die to create shapes. Drawing pulls hot metal through a die to reduce cross-section. The document compares various types of these processes and discusses their advantages in allowing shaping of metals above their recrystallization temperature for better mechanical properties.

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0% found this document useful (0 votes)

352 views34 pages

Hot and Cold Working

The document discusses various manufacturing processes involving hot working of metals. It describes processes like hot rolling, forging, extrusion and drawing. Hot rolling involves passing hot metal between rollers to reduce thickness. Forging involves shaping metals using dies or hammers while they are hot. Extrusion uses a punch to push hot metal through a die to create shapes. Drawing pulls hot metal through a die to reduce cross-section. The document compares various types of these processes and discusses their advantages in allowing shaping of metals above their recrystallization temperature for better mechanical properties.

Uploaded by

Copyright

© © All Rights Reserved

We take content rights seriously. If you suspect this is your content, claim it here.

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Manufacturing Processes

LECTURER : ZAINUDIN YAHYA

University TENAGA National
Manufacturing Processes

Hot Working of Metal

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

in cold working there is no

LECTURER change
: ZAINUDIN YAHYA in these properties
University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

Advantages of Hot Working

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

Disadvantages of Hot Working

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

Types of Hot Working

1- Hot rolling

section.
•After pouring the steel into molds, it is left to cool and form an
LECTURER : ZAINUDIN YAHYA
University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

Effect of hot rolling on grain structure

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

Calculation:

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

Roll Arrangement

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

2- Hot Forging:

Type of Hot Forging:

1- Hammer or smith Forging:

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

Equipment:

Disadvantage:

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

2- Drop Forging:

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
LECTURER : ZAINUDIN YAHYA
University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

Difference between Hammer and Drop forging

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

3- Hot Press Forging:

Equipment:

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

Calculation:

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

Advantage:

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

4- Upset Forging:

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

5- Roll Forging:

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

3- Hot Extrusion:

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

Advantages of extrusion:

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

4- Drawing:

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
Manufacturing Processes

LECTURER : ZAINUDIN YAHYA

University TENAGA National Lecturer: Habeeb Al-Ani
THANK YOU
LECTURER : ZAINUDIN YAHYA

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