April 26, 2021

It is the sheet metal operations of production of a hole in a sheet metal by the punch and die. In case of punching, a circular hole is produced, where as in the case of piercing, the hole produced may be of any shape. Blanking It is the operation of cutting a piece of the

To deform the metal permanently, the stress must exceed the elastic limit. At room temperature, the metal is in a more rigid state than when at higher temperature. Hot Working and Cold Working Metal Forming. Thus, to deform the metal greater pressures are needed when it is in cold state than when in hot state