The cast iron block of Evaluative Question 3 is to have the surface finished by removing 0.100 in. from one 4 X 6 surface. The piece is put into the shaper so the tool will travel over the 6-in....

The cast iron block of Evaluative Question 3 is to have the surface finished by removing 0.100 in. from one 4 X 6 surface. The piece is put into the shaper so the tool will travel over the 6-in. length and feed across the 4-in. side. The feed per stroke is 0.015 in., the unit horsepower is 1.4 hp/in.'/min. and the recommended speed is 100 ft/min. Assume a mechanical shaper and pretravel and overtravel of 1 in. a. What is the number of strokes per minute? (105)

b. What is the metal removal rate? (0.945 in.?/min)

c. What is the horsepower required at the cutter? (1.32 hp)

d. What is the time to cut the piece? (2.54 min)