Question

PART 3: OPTIONAL PROBLEMS Vertical milling is used to machine the whole surface (20 x 150 mm) of an aluminum block. The feed is along the longest length of the part. Use SI units for all your work. Tool: ø12.7 mm (ø0.500 in), 30 mm (1.181 in) long, 4 inserts Workpiece: 20 x 150 x 10 mm height (0.78 x 5.900 x 0.390 in height) a) Sketch the set up and list relevant information. Show any motion with an arrow. b) Calculate the rotation speed (rpm) of the tool. c) Calculate the time (minutes) to mill the entire surface layer. Work-out Solution Chip load 0.025 mm/insert (0.001 in/insert) Cutting speed 0.5 m/s (19.7 in/s) Depth of cut 1mm (0.039 in) Scratch (will not be graded) a)

Answer 1

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