मिलिंग कर्तन (कटर) की कर्तन चाल (कटींग स्पीड) 21 m/min है। यदि कर्तन (कटर) का व्यास 21 mm है तो कर्तन (कटर) के rpm ढूंढिए। (π = 22/7)

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ISRO SAC Technician B Fitter 6 Nov 2016 Official Paper
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  1. 25
  2. 318
  3. 2.5
  4. 2500

Answer (Detailed Solution Below)

Option 2 : 318
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अवधारणा:

कर्तन चाल:

  • कर्तन चाल वह चाल होती है जिस पर कर्तन कोर कर्तन के दौरान सामग्री के ऊपर से गुजरता है और मीटर प्रति मिनट में व्यक्त किया जाता है।
  • इसे निम्न द्वारा दिया जाता है:

V = \(\frac{\pi~\times~D~\times~N}{1000}\)

जहां, D = बरमा का व्यास (mm), N = rpm, V = m/min में कर्तन चाल

गणना:

दिया गया है:

V = 21 m/min, व्यास, D = 21 mm

∵ V = \(\frac{\pi~\times~D~\times~N}{1000}\)

⇒ 21 = \(\frac{\pi~\times~21~\times~N}{1000}\)

⇒ N = 318.18 rpm

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