Problem NO: 13

A carbon steel bar with 7.64 in diameter has a tensile strength of 65,000 lb/in2 and a shear strength of 45,000 lb/in2 . The diameter is reduced using

A carbon steel bar with 7.64 in diameter has a tensile strength of 65,000 lb/in2 and a shear strength of 45,000 lb/in2 . The diameter is reduced using a turning operation at a cutting speed of 400 ft/min. The feed is 0.011 in/rev and the depth of cut is 0.120 in. The rake angle on the tool in the direction of chip flow is 13°. The cutting conditions result in a chip ratio of 0.52. Using the orthogonal model as an approximation of turning, determine (a) the shear plane angle, (b) shear force, (c) cutting force and feed force, and (d) coefficient of friction between the tool and chip.

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