Q 1,17 1. Suppose you wanted to machine cast iron with BHN of 275. The process...
-A O40mm HSS face mill is being used to machine grey cast iron. Determine a suitable speed in revmin^-1 for average metal cutting conditions
.Suppose you want to drill a 2-in. thick plate of cast steel (0.4%C), 4-in. diameter hole. An indexable HSS insert drill has been selected. Consider the table below, select the appropriate cutting speed, feed rate. Calculate the spindle speed (rpm), the feed rate (in/min), the MRR, and cutting time. Assume the cutting process will be performed in3 steps using 3 drills sizes in sequence 1”, then 2”, then 4”. Calculate the cutting total cutting time, considering a proper allowance each...