GATE ME 2016 Set 1 — Question 60
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Manufacturing Processes → Machining & Machine Tools → Tool Life (Taylor's Equation)
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Question
The tool life equation for HSS tool is . The tool life () of 30 min is obtained using the following cutting conditions:
, ,
If speed (), feed () and depth of cut () are increased individually by 25%, the tool life (in min) is
, ,
If speed (), feed () and depth of cut () are increased individually by 25%, the tool life (in min) is
Correct answer
(B) 1.06
Solution
The tool life equation is .
Let the initial conditions be and final conditions be .
Given , , and .
Equating the constants:
Substituting the final conditions:
Thus,
Given min:
min.
The closest option is 1.06.
Let the initial conditions be and final conditions be .
Given , , and .
Equating the constants:
Substituting the final conditions:
Thus,
Given min:
min.
The closest option is 1.06.
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