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Unformatted text preview: A while calculating the cutting time. Hint: 1 foot = 12 inches. 2. A lathe turning process is carried out on an Al alloy workpiece with cutting speed V = 400 surface feet per minute, depth of cut d = 0.11 inches and feed rate f r = 0.009 ipr. The unit power expected for machining the Al alloy is 0.35 hp/(inch 3 /min). Estimate the cutting force F c , necessary to perform this operation. Assume that the correction factor CF and the efficiency E both equal 1. 3. A lathe turning operation is performed on a material with shear strength 50,000 lb/inch 2 . The operation is described by the following parameter values: cutting speed = 4800 inches/min, depth of cut d = 0.15 inches, feed rate f r = 0.02 ipr, tool rake angle = 5, toolchip coefficient of friction = 0.58. What is the cutting force expected for this operation? Assume that the turning operation is an orthogonal machining process....
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 Spring '11
 Cheng

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