Method for producing a wave winding coil winding

A method for producing a wave winding for forming a coil winding having at least one wave winding layer in a stator or rotor element with a winding former rotatable about a longitudinal axis, comprising the method steps:

• a. feeding parallel coil wires onto a first side of the winding former in a winding section of the winding former, the winding section having a first winding width;
• b. forming winding heads by alternately axially shifting the parallel coil wires on the winding former and winding them around the winding former that is rotated;
• and
• c. repeating steps a and b until the wave winding has reached a length of a first wave winding layer of the coil winding,
• repeating steps a and b in at least one further winding section of the winding former with a different winding width than the first winding width until the wave winding has reached a length of a further wave winding layer of the coil winding;
• and
• wherein an intermediate step having an intermediate winding in an intermediate section is provided in a transfer from the winding section to the further winding section, wherein a winding width of the intermediate section lies between the winding widths of the winding sections and is uniform in the intermediate section between the winding section and further winding section,
• whereby forming of a frustoconical winding is avoided by increasing or decreasing the winding widths in a step-wise manner along the longitudinal axis.