A cylindrical stainless steel rod with length 250 mm and diameter 160 mm is to be turned to diameter of 10 140 mm. The operator decides to turn the rod by number of roughing cuts and a final finishing cut. Calculate the total time required for machining the component. Assume feed 0.62mm/rev, cutting speed 60m/min and depth of cut 3 mm per pass for roughing cut. The finishing cut, assume the feed as 0.1 mm/rev, cutting speed 150m/min and depth of cut 0.5 mm. Assume pre-travel length of 12mm for each cut.
Answers
Answer:
A cylindrical stainless steel rod with length 250 mm and diameter 160 mm is to be turned to diameter of 10 140 mm. The operator decides to turn the rod by number of roughing cuts and a final finishing cut. Calculate the total time required for machining the component. Assume feed 0.62mm/rev, cutting speed 60m/min and depth of cut 3 mm per pass for roughing cut. The finishing cut, assume the feed as 0.1 mm/rev, cutting speed 150m/min and depth of cut 0.5 mm. Assume pre-travel length of 12mm for each cut.
Answer:
The total time required for machining the component is approximately 9.14 hours or 549.57 minutes.
Explanation:
To determine the total time required for machining the component, we need to calculate the time required for each roughing cut and the finishing cut.
Let's start by calculating the number of roughing cuts required to reduce the diameter from 160 mm to 10 140 mm.
Initial diameter of rod = 160 mm
Final diameter of rod = 10 140 mm
Reduction in diameter = 160 mm - 10 140 mm = 9980 mm
Assuming a depth of cut of 3 mm per pass, the number of roughing cuts required would be:
Number of roughing cuts = Reduction in diameter / (2 x depth of cut)
Number of roughing cuts = 9980 mm / (2 x 3 mm) = 1663.33
Since we can't have a fraction of a cut, we need to round up to the nearest integer. Therefore, we need 1664 roughing cuts.
Next, let's calculate the time required for each roughing cut:
Length of cut = 250 mm / 1664 = 0.15 mm
Time per roughing cut = (Length of cut + Pre-travel length) / Feed rate
Time per roughing cut = (0.15 mm + 12 mm) / 0.62 mm/rev = 19.68 seconds
The total time required for all roughing cuts would be:
Total time for roughing = Time per roughing cut x Number of roughing cuts
Total time for roughing = 19.68 seconds x 1664 = 32779.52 seconds
Now, let's calculate the time required for the finishing cut:
Length of cut = 250 mm - (1663 x 3 mm) - 12 mm = 1 mm
Time for finishing cut = (Length of cut + Pre-travel length) / Feed rate
Time for finishing cut = (1 mm + 12 mm) / 0.1 mm/rev = 130 seconds
The total time required for machining the component would be:
Total time = Total time for roughing + Time for finishing cut
Total time = 32779.52 seconds + 130 seconds = 32909.52 seconds
Therefore, the total time required for machining the component is approximately 9.14 hours or 549.57 minutes.
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