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. Determine the appropriate punch size for this operation (Punch diameter - Db - 2c) Clearance allowance value for Metal Group |1100S and 5052S aluminum alloys, 0.045 all tempers 2024ST and 6061 ST aluminum alloys; brass, all tempers; soft cold- rolled steel, soft stainless steel Cold-rolled steel, half hard; stainless steel, half-hard and full- Ac 0.060 0.075 hard 74,70 98,20 82,70 88,80 95.10

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Forming and Shaping

Metal forming is a category of metalworking process through which the material can be given the desired shape and size by subjecting it to plastic deformation, where the component undergoes bulk deformation process upon application of loads. Unlike the shearing and machining process, the material does not undergo up to a failure point as indicated in the stress-strain curve. Hence, the stresses induced during the forming process are greater than yield strength but less than the failure strength of the material. The process does not lead to the loss of material, so it can be said to be an economical process. During forming, the material is subjected to tensile forces, compressive forces, bending, and shearing loading conditions. The material should possess the property of ductility to undergo the forming process.