Orthogonal machining of steel work-piece is one with a HSS tool of zero rake angle. The ratio of the cutting force and the thrust force on the tool is 1:0:372. The length of cut chip is 4.71 mm while the uncut chip length is 10 mm. what are the shear plane angle Φ and friction angle β in deg.? Use Merchant’s theory
(a) 32,49m 10.22 (b) 25.22, 20.41
(c) 64.78, 20.41 (d) 25.22, 23.21