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...Metal forming processes large set of manufacturing in which the material is deformed plastically to take shape die geometry tools used for such deformation are called punch etc depending on type process plastic stresses beyond yield strength workpiece required categories bulk sheet stretching general classification r ganesh narayanan iitg m p groover fundamental modern materials and systems ed basic forging wire drawing rolling extrusion it a severe resulting massive change surface area volume work relatively small mostly done hot working conditions this form slab or plate compressed between two rotating rolls thickness direction so that reduced draw into gap compresses final product dies containing shaped contours shapes imparted part pushed opening hole as its cross section rod similar except pulled through bending deep shearing involves cutting operations performed sheets strips coils ratio starting high include deform strained by give bend angle usually straight axis cup operation ...