A winding mat for forming a coil winding of a component of an electrical machine, comprising a plurality of undulatingly bent wave winding wires (24, 24a-24f) extending in a longitudinal direction comprising wire sections longitudinally spaced and extending in a transverse direction transverse to the longitudinal direction, and roof-shaped winding heads (30, 30a, 30b) therebetween, such that adjacent straight wire sections are interconnected by a roof-shaped bent winding head (30, 30a, 30b) to form a half-wave section (32a, 32b), such that first half-wave sections having first winding heads bent in a first direction and second half-wave sections having second winding heads bent in an opposite second direction are alternately provided, and a first half-wave section and an adjacent second half-wave section each form a wave section, wherein the wave winding wires (24, 24a-24f) are not intertwined or looped around each other, but are joined together by plugging the wave winding wires (24, 24a-24f) together in the transverse direction with respect to each other, characterized in that plugging together the wave winding wires (24, 24a-24f) in the transverse direction to each other is joined together in such a manner that, at at least one plugging area of the winding mat, a first and an adjacent second sub-section of said one wave winding wire (24a-24e) and a first and an adjacent second sub-section of the other wave winding wire (24b-24f) are plugged into each other in such a manner that the first sub-section of the one wave winding wire (24a-24e) is inserted under the first sub-section of the other wave winding wire (24b-24f) in a height direction extending transversely to the longitudinal direction and transversely to the transverse direction, and the second sub-section of the one wave winding wire (24a-24e) is inserted over the second sub-section of the other wave winding wire (24b-24f) in a height direction extending transversely to the longitudinal direction and transversely to the transverse direction. wherein the wave winding wires (24, 24a-24f) are not intertwined or looped around each other, but are joined together by plugging the wave winding wires (24, 24a-24f) together in the transverse direction with respect to each other, characterized in that plugging together the wave winding wires (24, 24a-24f) in the transverse direction to each other is joined together in such a manner that, at at least one plugging area of the winding mat, a first and an adjacent second sub-section of said one wave winding wire (24a-24e) and a first and an adjacent second sub-section of the other wave winding wire (24b-24f) are plugged into each other in such a manner that the first sub-section of the one wave winding wire (24a-24e) is inserted under the first sub-section of the other wave winding wire (24b-24f) in a height direction extending transversely to the longitudinal direction and transversely to the transverse direction, and the second sub-section of the one wave winding wire (24a-24e) is inserted over the second sub-section of the other wave winding wire (24b-24f) in a height direction extending transversely to the longitudinal direction and transversely to the transverse direction.