GATE ME 2020 Set 1 — Question 52
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Manufacturing Processes → Machining & Machine Tools → Conventional Machine Tools
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Question
A slot of is to be milled in a workpiece of length using a side and face milling cutter of diameter , width and having 20 teeth.For a depth of cut , feed per tooth , cutting speed and approach and over travel distance of each, the time required for milling the slot is ___________ minutes (round off to one decimal place).
Correct answer
7 to 9
Solution
1.Calculate spindle speed ():
2.Calculate table feed rate ():
3.Calculate total travel length per pass ():
Geometric approach Total length
4.Calculate time per pass ():
5.Calculate total time for 5 passes:
Since the slot depth is and depth of cut is , the number of passes .Total time .Rounding to one decimal place, .
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