Introduction production engineering

2. Unit -1
Overview of Mechanical Engineering
Mechanical Engineering contributions to the welfare
of Society
• Specialized sub disciplines in Mechanical Engineering
- Production, Automobile, and Energy Engineering
• Interdisciplinary concepts in Civil and Mechanical
Engineering.

3. Production Engineering
 Production engineering is also known as
Manufacturing engineering.
 Production is the process of converting raw
materials into finished products with
minimum cost.
 Production processes such as forming,
machining, joining, and casting.
 Modern machining process

4. Metal forming process

5. Metal forming process
 Metal forming is the process of changing the shape of
a solid without any change in it’s mass or material
compositions.
 In forming process no material is removed instead of
material is deformed.
 Metal forming process may be either hot working or
cold working depending upon temperature and strain
rate

6. Hot working
 In hot working, plastic
deformation takes place
above recrystallisation
temperature but below
melting point.

7. Cold working
 In cold working, plastic
deformation takes place
below recrystallisation
temperature.

8. Example of forming
Rolling
Piercing
Drawing
Spinning
Extrusion
Forging

9. Example of forming

10. Example of forming

11. Example of forming

12. Metal Machining Process

13. Metal Machining process
 In metal machining process or cutting
shaping process, material is cut by a
machine tool to form desired shape.
 Various machine tools are lathe, drilling,
milling, grinding, planer, shaper

14. Lathe machine
 Lathe is a father of all
machine tools
 Cylinders, turbine shaft
are made by lathe
machine
 Automatic lathe such as
a capstan and turret
lathe are also available

15. Drilling machine
 Drilling machine used to
form a hole in the work
piece
 Drilling machine used
multipoint cutting tools

16. Milling machine
 Milling is the process
of machining using
rotary cutters to remove
material by advancing a
cutter into a work piece.
This may be done varying
direction on one or
several axes, cutter head
speed, and pressure.

17. Grinding process
 Grinding is machining
process that's used to
remove material from a
work piece via
a grinding wheel. As
the grinding wheel
turns, it cuts material off
the wor kpiece while
creating a smooth
surface texture in
the process.

19. Metal casting process
 It is the process of
forming metal products
by melting the metal,
pouring it into a cavity
called mould and allow
to solidify
 Green sand moulding is
a best example for this
process

20. Metal casting process

21. Welding process
 Welding is a
fabrication process whe
reby two or more parts
are fused together by
means of heat, pressure
or both forming a join as
the parts cool.
 Welding is usually used
on metals and
thermoplastics but can
also be used on wood.