Transformer winding and production method thereof

1. A method for producing a winding, particularly for an electrical transformer from a cylindrical tubular metal element of polygonal cross-section having side surfaces, characterized in that the method comprises steps of:

machining, in a first series of passes, a first series of cuts substantially parallel to one another through each of the side surfaces, except for one of the side surfaces of the tubular element with the first series of cuts, being substantially perpendicular to a longitudinal axis of the tubular element; and

machining, in a second series of passes, a second series of cuts in said one of said side surfaces in order to ensure that junctions of the first series of cuts open out adjacent to the second series of cuts, so that the first and second series of cuts are continuous with respect to one another and constitute a single groove of helicoidal shape.

2. The method according to claim 1 , characterized in that machining of the first and second series of cuts is ensured by means of a rotary machining disc.

3. The method according to claim 1 , wherein the second series of cuts are inclined from each of the first series of cuts.

4. The method according to claim 1 , wherein the first series of cuts cut along an entirety of each of the side surfaces with the exception of said one of said side surfaces.

5. The method according to claim 4 , wherein the second series of cuts cut along an entirety said one of said side surfaces.