The
tool life of a tool is said to be over if
The
tool has failed and a poor surface finish is obtained
Sudden
increase in power and cutting forces takes place and chatter appears in
machining
Overheating
and fuming due to friction occurs in addition to dimensional instability
All
option are correct
All
option are correct
The
tool life is said to be over if:
1.
Poor surface finish is obtained.
2.
There is sudden increase in cutting forces and power consumption.
3.
Overheating and fuming due to heat of friction starts.
Hence, the correct option is (D).
&Key Points:-
Ways
of measuring tool life :
1.
Number of pieces of work machined
2.
Total volume of material removed
3.
Total length of cut
4.
Limiting value of surface finish
5.
Increase in cutting forces
6.
Dimensional accuracy
7.
Overheating and fuming
8.
Presence of chatter
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