A ϕ 40 mm job is subjected to orthogonal turning by a + 100 rake angle tool at 500 rev/min. By direct measurement during the cutting operation, the shear angle was found equal to 250
The velocity (in m/min) with which the chip flows on the tool face is
(a) 32 (b) 63 (c) 22 (d) 27.5
If the friction angle t the tool-chip interface is 580 10’ and the cutting force components measured by a dynamometer are 600 N and 200 N, the power loss due to friction (in kNm/min) is approximately.
(a) 20 (b) 18 (c) 16 (d) 250