Unformatted text preview: velocity of 165 ft/min (50 m/min), feed of 0.010 inch (0.254 mm), and depth of cut of 0.100 inch (2.54 mm). During the test, the dynamometer reading indicated 450 lbs (2000 N) in the cutting direction and 200 lbs (890 N) in the feed direction. The wattmeter reading for the main spindle motor was 2.68 HP (2 KW). (a) Determine the efficiency of this machine. (b) What is the specific horsepower of this material? 3. Textbook 21.45 An orthogonal cutting operation is being carried out under the following conditions: t =0.1 mm, t c =0.2 mm, width of cut = 5 mm, V c = 2 m/s, rake angle= 10 ° , F c =500 N and F t =200N. Calculate the percentage of the total energy that is dissipated in the shear plane....
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- Spring '09