The shaping operation may be performed in the same die as cutting operation, which deforms the mental to various degrees. Shaping operations are generally divided into three groups: · Bending · Forming · Drawing What is spring back? How does it can be prevented? Spring back: Elastic stresses remaining in the bend area after bending pressure is released will cause a slight decrease in the bend angle. Metal movement of this type is known as spring back. Prevention: it can be prevented in wiping dies by ‘ironing’ the material. To iron the bend effectively the distance between the punch & the die must be slightly less than the metal thickness. Ironing in the corner will be effectively accomplished only by using a slight shoulder o...
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