Patent ID: 8020282

Claim:
An apparatus for producing a wave-type winding pattern made of a series of fillets and head portions for an electrical element of an electrical machine from coil windings of a group of n wires, wherein two associated fillets of a wire are joined by a respective gable-shaped head portion, said apparatus for producing a wave-type winding pattern comprising: a wire guide which pays out n parallel wires in a plane with a predetermined intermediate distance between adjacent wires; a flat former having opposite first and second long flat sides which alternatively take up the n parallel wires from the wire guide while maintaining the intermediate distances of the n wires, said flat former being operative to undergo repeated 180° winding rotations about a pivot axis whereby n fillets of the n parallel wires are wound flat against the respective first and then second flat sides of the flat former; first and second shaping bodies which are oppositely spaced a same radial distance from both the first and second sides of the former, the first and second shaping bodies being operative to undergo a) a stepwise 180° rotation with the 180° winding rotation of the flat former so that the n parallel wires paying out from the wire guide are alternately rotated with the first and second shaping bodies to form n fillets on the respective first and second flat sides of the former and to form respective n head portions extending laterally away from the n fillets on the flat former, and b) a removal from adjacent the n head portions formed by the 180° rotation, to reduce tension on the just-formed n head portions; means for holding n ends of each respective previously-formed fillets; and first and second guide devices which displace the n just-formed fillets relative to the former such that legs of each n head portions are spread apart and gable shaped head portions are formed.