PPT: Principles of Machining | Manufacturing Engineering - Mechanical Engineering PDF Download

 Page 1


Non Conventional Machining
Page 2


Non Conventional Machining
Comparison between Conventional and Non-conventional 
machining :
Sr.
No
Conventional Non-Conventional
1
Direct contact of tool and 
workpiece.
Tools are non-conventional technique 
like Laser beam, electric arc etc.
2
Cutting tool is always harder than 
w/p.
Tool may not be harder and it may not 
be physical presence.
3 Tool life is less due to high wear. Tool life is more.
4
Generally Macroscopic chip 
formation.
Material removal occur with or without 
chip formation .
5
Material removal takes place due to 
application of cutting force.
It uses different energy like electrical, 
Thermo-Chemical  etc. to provide 
machining.
6 Suitable for all material Not suitable for all material.
7
It cannot be used to make prototype 
parts very effectively.
It can be used to produce prototype 
parts very effectively.
Page 3


Non Conventional Machining
Comparison between Conventional and Non-conventional 
machining :
Sr.
No
Conventional Non-Conventional
1
Direct contact of tool and 
workpiece.
Tools are non-conventional technique 
like Laser beam, electric arc etc.
2
Cutting tool is always harder than 
w/p.
Tool may not be harder and it may not 
be physical presence.
3 Tool life is less due to high wear. Tool life is more.
4
Generally Macroscopic chip 
formation.
Material removal occur with or without 
chip formation .
5
Material removal takes place due to 
application of cutting force.
It uses different energy like electrical, 
Thermo-Chemical  etc. to provide 
machining.
6 Suitable for all material Not suitable for all material.
7
It cannot be used to make prototype 
parts very effectively.
It can be used to produce prototype 
parts very effectively.
Electrical Discharge Machining
or
Spark Erosion
or
Spark machining
or
Thermal Erosion
or
Electro Erosion Process
Page 4


Non Conventional Machining
Comparison between Conventional and Non-conventional 
machining :
Sr.
No
Conventional Non-Conventional
1
Direct contact of tool and 
workpiece.
Tools are non-conventional technique 
like Laser beam, electric arc etc.
2
Cutting tool is always harder than 
w/p.
Tool may not be harder and it may not 
be physical presence.
3 Tool life is less due to high wear. Tool life is more.
4
Generally Macroscopic chip 
formation.
Material removal occur with or without 
chip formation .
5
Material removal takes place due to 
application of cutting force.
It uses different energy like electrical, 
Thermo-Chemical  etc. to provide 
machining.
6 Suitable for all material Not suitable for all material.
7
It cannot be used to make prototype 
parts very effectively.
It can be used to produce prototype 
parts very effectively.
Electrical Discharge Machining
or
Spark Erosion
or
Spark machining
or
Thermal Erosion
or
Electro Erosion Process
Principle of EDM:
Page 5


Non Conventional Machining
Comparison between Conventional and Non-conventional 
machining :
Sr.
No
Conventional Non-Conventional
1
Direct contact of tool and 
workpiece.
Tools are non-conventional technique 
like Laser beam, electric arc etc.
2
Cutting tool is always harder than 
w/p.
Tool may not be harder and it may not 
be physical presence.
3 Tool life is less due to high wear. Tool life is more.
4
Generally Macroscopic chip 
formation.
Material removal occur with or without 
chip formation .
5
Material removal takes place due to 
application of cutting force.
It uses different energy like electrical, 
Thermo-Chemical  etc. to provide 
machining.
6 Suitable for all material Not suitable for all material.
7
It cannot be used to make prototype 
parts very effectively.
It can be used to produce prototype 
parts very effectively.
Electrical Discharge Machining
or
Spark Erosion
or
Spark machining
or
Thermal Erosion
or
Electro Erosion Process
Principle of EDM:
? The main attraction of EDM over conventional machining is that
this technique use thermoelectric process to erode undesired
material from the w/p.
Construction :
? System consist of Shaped tool, Power supply source, Dielectric
fluid and its circulation line, Servo controlled tool feed mechanism
and work.
? Tool Cathode ( Negative terminal)
? Work Anode ( Positive terminal)
? Terminals are connected to DC power supply to create potential
difference between work and tool.
? Distance between work and tool is known as Spark gap and it is
filled by dielectric fluid.