7. One of the most common models of the metal cutting operation is to consider it to be a process of shear on a single p

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7 One Of The Most Common Models Of The Metal Cutting Operation Is To Consider It To Be A Process Of Shear On A Single P 1 (135.88 KiB) Viewed 7 times

7. One of the most common models of the metal cutting operation is to consider it to be a process of shear on a single plane. Indicate why a model is desirable or necessary and list workers who have used this or alternative approaches. In an orthogonal metal cutting operation which approximates closely to the thin zone model of the cutting process, the cutting conditions were as follows: Tool rake angle 20° Cutting speed 90 m min Depth of cut 0.25 mm Width of cut 2.5 mm Component of resultant force in direction of cutting 2.000 N Component of resultant force perpendicular to direction of cutting 1,200 N Cutting ratio 0.35 Estimate a value for the inclination of the shear plane and the total power which is used to overcome friction. If the shear stress may be assumed uniformly distributed over the shear plane and the friction at the chip tool interface to approximate to that of dry sliding friction, calculate values for the shear stress and the coefficient of friction at the chip tool interface. defertarist 85 = 1 1 1 AS