टेलर के उपकरण जीवन VT0.5 = C का उपयोग करके, उपकरण जीवन काल की गणना की जाती है। अब कर्तन गति आधी हो गई है, उपकरण जीवन काल में प्रतिशत वृद्धि है:

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  1. 300%
  2. 50%
  3. 200%
  4. 75%

Answer (Detailed Solution Below)

Option 1 : 300%
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Detailed Solution

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Concept:

Taylor's tool life is given by - 

VTn = C

where V = Cutting velocity (m/min), T = Tool life (min), n = Taylor's exponent and C = Taylor's constant.

Calculation:

Given:

V1 = V m/min, T1 = T min, n = 0.5, \(V_2=\frac{V}{2} \; m/min\)

Applying tool life equation:

\(V_1T_1^{0.5}=V_2T_2^{0.5}\)

\(\Rightarrow (\frac{T_2}{T_1})^{0.5}=\frac{V_1}{V_2}\)

\(\Rightarrow \frac{T_2}{T_1}=(2)^{\frac{1}{0.5}}\)

T2 = 4T1

% increase in tool life is -

\(\%\;increase=(\frac{T_2-T_1}{T_1})\times\;100\;{\%}\)

\(\%\;increase=(\frac{4T_1-T_1}{T_1})\times\;100\;{\%}\)

% increase = 300 %.

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