GATE ME 2024 Set 1 — Question 64
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Manufacturing Processes → Machining & Machine Tools → Conventional Machine Tools
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Question
A flat surface of a C60 steel having dimensions of (length) (width) is produced by a HSS slab mill cutter. The 8-toothed cutter has diameter and width. The feed per tooth is , cutting velocity is and depth of cut is . The machining time required to remove the entire stock is _____________ minutes (rounded off to 2 decimal places).
Correct answer
2.2 to 2.65
Solution
Given data:
Workpiece length,
Workpiece width,
Number of teeth,
Cutter diameter,
Cutter width,
Feed per tooth,
Cutting velocity,
Depth of cut, Step 1: Calculate the rotational speed () of the cutter.Step 2: Calculate the table feed rate ().Step 3: Calculate the approach length () for slab milling.Step 4: Calculate the machining time ().
Assuming only approach length is considered for the cutter to start removing material:If overtravel is also considered (to completely clear the stock), the time would be:Both values fall within the official range of to . Rounding to two decimal places gives .
Workpiece length,
Workpiece width,
Number of teeth,
Cutter diameter,
Cutter width,
Feed per tooth,
Cutting velocity,
Depth of cut, Step 1: Calculate the rotational speed () of the cutter.Step 2: Calculate the table feed rate ().Step 3: Calculate the approach length () for slab milling.Step 4: Calculate the machining time ().
Assuming only approach length is considered for the cutter to start removing material:If overtravel is also considered (to completely clear the stock), the time would be:Both values fall within the official range of to . Rounding to two decimal places gives .
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