Orthogonal machining of a steel workpiece is done 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 is the shear plane angle and friction angle in degree? Use Merchants theory

Orthogonal machining of a steel workpiece is done with a HSS tool of z

1.	Orthogonal machining of a steel workpiece is done 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 is the shear plane angle and friction angle in degree? Use Merchants theory
A.	32.49, 10.22
B.	25.22, 20.41
C.	64.78 20.41
D.	25.22, 23.21
Answer» C. 64.78 20.41

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