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AMEM201 LEC9 PROBLEMS - FIT Staffweb

Turning formulas 1. A cylindrical stainless steel rod with length L=150 mm, diameter D0 = 12 mm is being reduced in diameter to Df =11 mm by turning on a lathe. The spindle rotates at N = 400 rpm, and the tool is travelling at an axial speed of =200 mm/min Calculate: a. The cutting speed V (maximum and minimum) b. The material removal rate MRR c. The cutting time t d. The power required if the unit power is estimated to 4 SOLUTION: a. The maximum cutting speed is at the outer diameter D0, and is obtained from the expression V = D0 N Thus, Vmax = ( ) (12) (400) = 15072 mm/min The cutting speed at the inner diameter Df is Vmin = ( ) (11) (400) = 13816 mm/min b.

1. A cylindrical stainless steel rod with length L=150 mm , diameter D0 = 12 mm is being reduced in diameter to Df =11 mm by turning on a lathe.

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