Calculate the rolling force required to hot reduce an AISI 1018 steel plate, 80 cm wide, from an initial thickness of 5 mm to a final thickness of 3.5 mm. The rollers are made of steel with a diameter of 350 mm. Through plane strain compression tests, it was determined that the material has a plane strain yield stress of 150 MPa. Assume an efficiency of 60%. Answer: P=3.24 NM

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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.