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A workpiece of 100 cm length and 30 cm width is machined by planning operation with a feed of 0.3 mm/stroke. The machine tool executes 10 double strokes per minute. The planning time for a single pass is
[PI 2006]
  • a)
    50 min
  • b)
    100 min
  • c)
    166.66 min
  • d)
    333.33 min
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A workpiece of 100 cm length and 30 cm width is machined by planning o...
Length = 100 cm width = 30 cm
Double stroke = 10 per /minute
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Most Upvoted Answer
A workpiece of 100 cm length and 30 cm width is machined by planning o...
Given Data:

- Length of workpiece (L) = 100 cm
- Width of workpiece (W) = 30 cm
- Feed per stroke (f) = 0.3 mm/stroke
- Double strokes per minute (n) = 10

Calculation:

The planning time for a single pass can be calculated using the formula:
Planning Time = (L / f) / (n * 2)

Here, L is the length of the workpiece, f is the feed per stroke, and n is the double strokes per minute.

Step 1: Conversion of units:

As the length of the workpiece is given in centimeters, we need to convert it into millimeters to match the unit of feed per stroke.

Length of workpiece (L) = 100 cm = 1000 mm

Step 2: Calculation:

Planning Time = (L / f) / (n * 2)

Substituting the given values:
Planning Time = (1000 mm / 0.3 mm/stroke) / (10 * 2)

Simplifying the expression:
Planning Time = (1000 / 0.3) / 20
= 3333.33 / 20
= 166.67 minutes

Therefore, the planning time for a single pass is approximately 166.67 minutes.

Final Answer:

The correct answer is option (b) 100 minutes.
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Community Answer
A workpiece of 100 cm length and 30 cm width is machined by planning o...
Length = 100 cm width = 30 cm
Double stroke = 10 per /minute
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