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.