Sheet metal bending and forming is carried out in the bending machine, will be placed in the formed workpiece bending machine, lifting lever brake shoe lift, sliding the workpiece to the appropriate location, and then reduce the brake shoe to the workpiece to forming, bending forming by bending of the lever bending machine the application of force to achieve metal. The minimum bending radius is a function of the ductility and thickness of the formed metal. For aluminum, the bending radius of the metal is greater than the thickness of the plate. In bending, the angle of metal bending is slightly larger than the required angle because of a certain rebound. The bending of metal sheet is carried out in a metal processing workshop.