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In an orthogonal cutting experiment, as HSS tool having the following tool signature in the orthogonal reference system (ORS) has been used:

0-10-7-7-10-75-1

Given: Width of cut = 3.6 mm;

Shear strength of work piece material = 460N/mm2

Depth of cut = 0.25 mm;

Coefficient of friction at chip tool interface = 0.7

 

Shear plane angle (in degrees) for minimum cutting force is

(a) 20.5       (b) 24.5         (c) 28.6          (d) 32.5

 

Minimum Power requirement (in KW) at a cutting speed of 150m/min is

(a) 2.6       (b) 3.25          (c) 3.35            (d) 3.45

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