A blanking operation is to be performed on 2.0 mm thick cold rolled steel (half hard). The part is circular with diameter = 75.0 mm. a) Determine the appropriate punch and die sizes for this operation, b) Determine the blanking force required, if the steel has a shear strength = 350 MPa. %3D TABLE 20.1 Clearance allowance value for three sheet-metal groups. Metal Group A. 1100S and 5052S aluminum alloys, all tempers 2024STand 6061STaluminum alloys; brass, all tempers; soft cold- rolled steel, soft stainless steel 0.045 0.060 Cold-rolled steel, half hard; stainless steel, half-hard and full-hard 0.075 S = shear strength of the sheet metal, MPa. TS = ultimate tensile strength MPa t = stock thickness, mm L = Length of cut edge, mm c = Act F = StL %3D clearance, mm; F = 0.7(TS)tL Ac= clearance allowance; t = stock thickness, mm Activate Wir