To apply it, we use mainly hydraulic machines with high tons of pressure capacity that bend the metal sheets giving them a new form. These machines are standard so the initial cost is low and it can be used for low production rates. If the bending is specific, it will have to use specific machines increasing the cost of the process and the production quantity requires.
During bending it produces changes into the component. When the pressure is on it, the metal is compressed on a side and extended on the other. But when pressure disappear these deforms do not persist because the metal has an elastic zone producing a return effect.