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8. Sheet Metal Drawing Review Problem A deep drawing operation is performed to produce a cylindrical cup in which the inside diameter D 4.25 in and height h 2.65 in. Stock thickness 3/16 in, and blank diameter D, 7.7 in. Punch and die radii R, R 5/32 in. The metal has a tensile strength TS 65,000 lb/in2, yield strength Y- 32,000 Ib/in2, and shear strength S 40,000 lb/in2. Determine the (a) drawing ratio, (b) reduction, (c) drawing force, and (d) blankholder force. T0
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