Patent ID: 8683679

Claim:
Pre-forming apparatus for an electrical bar conductor of an electrical bar winding, comprising: a punch provided with moving members for exerting a thrust on the conductor during the relative pre-forming, the punch being in contact with a guiding groove on a surface of the apparatus and axially sliding along the guiding groove in a pre-forming direction (X-X), the punch being provided with a cursor connected to a moving arm and with a pre-forming head suitable for engaging with the conductor, the conductor, in pre-forming conditions, being a linear element arranged along a cross direction (Y-Y), perpendicular to said pre-forming direction (X-X), the apparatus comprising a first pre-forming chamber suitable for being crossed by the conductor and by the punch during the advance of the punch as it axially slides along the guiding groove for the pre-forming operation, wherein the forming head is comprises a fork portion so as to hook and keep the conductor hooked during the displacement of the punch for pre-forming the conductor.