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Manufacturing Engineering
Machining Processes
GATE 2012
Medium

A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2 mm depth by a cutter of 10 mm diameter between points (0, 0) and (100, 100) on the XY plane (dimensions in mm). The feed rate used for milling is 50 mm/min. Milling time for the slot (in seconds) is

  • A120
  • 170
  • C180
  • D240

Explanation

Toolpath (slot) length = distance from (0,0) to (100,100) = √(100²+100²)=141.42 mm. Time = length/feed rate = 141.42/50 = 2.828 min = 169.7 s ≈ 170 s.

Source: GATE ME 2012 (Booklet Code A) (2012)

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