7th July 2016
A pre-form (flat blank or preformed blank) is fastened on the shear-forming tool with a pressure plate and rotated by the main spindle drive. The pre-form is moved along by a friction lock. The shear-forming rollers are applied locally at the circumference, starting from the bottom to the opening diameter of the pre-form. The direct pressure effect of the rollers plastically deforms the material and produces the workpiece in one shear-forming overrun. Material is reduced under mathematic conditions, the so-called shear-forming law.