Slab milling is performed on the top surface of a rectangular workpiece that is 12.0 in...

 

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Slab milling is performed on the top surface of a rectangular workpiece that is 12.0 in long by 2.5 in wide by 4.0 in thick. The helical milling cutter, which has a 3.0 in diameter and eight teeth overhangs the width of the part on both sides. Cutting speed = 125 ft/min, feed = 0.006 in/tooth, and depth of cut 0.300 in. Determine (a) machining time, (2 marks) (b) maximum metal removal rate during the cut. (2 marks) (c) by considering minimum values of an additional approach distance at the beginning of the pass (before cutting begins) and an overtravel distance at the end of the pass, what is the duration of the feed motion. (3 marks) Slab milling is performed on the top surface of a rectangular workpiece that is 12.0 in long by 2.5 in wide by 4.0 in thick. The helical milling cutter, which has a 3.0 in diameter and eight teeth overhangs the width of the part on both sides. Cutting speed = 125 ft/min, feed = 0.006 in/tooth, and depth of cut 0.300 in. Determine (a) machining time, (2 marks) (b) maximum metal removal rate during the cut. (2 marks) (c) by considering minimum values of an additional approach distance at the beginning of the pass (before cutting begins) and an overtravel distance at the end of the pass, what is the duration of the feed motion. (3 marks)