Stator manufacturing method and stator

A stator manufacturing method comprising:

• a lead wire bending process of inserting a plurality of concentrically wound coils into slots, each of the concentrically wound coils being formed by winding a flat conductive wire for a plurality of turns, each of the slots being formed between every two adjacent teeth extending radially inward from an annular back yoke of a stator core, and bending lead wire portions of the inserted concentrically wound coils projecting in an axial direction of the stator from an end surface of the stator core,
• the concentrically wound coils include coil end portions projecting from the end surface of the stator core in directions along the axial direction of the stator,
• the coil end portions include a plurality of vertex portions projecting outward in the directions along the axial direction of the stator,
• the vertex portions provided adjacently to each other in a circumferential direction of the stator core, wherein:
• the lead wire portions before being bent in the lead wire bending process extend in a circumferential direction of the stator core while extending in the axial direction of the stator core, and
• the lead wire bending process includes a first bending process of bending the lead wire portions using, as fulcrums, predetermined parts between connection parts between the lead wire portions and slot accommodation portions of the concentrically wound coils and ends of the lead wire portions, the predetermined parts located above the vertex portions along the axial direction of the stator, the connection parts located between a side of the stator core end surface and the vertex portions, the slot accommodation portions being accommodated in the slots, so that parts positioned closer to the ends than the predetermined parts topple radially outward from radially inward of the stator core;
• and
• a second bending process performed after the first bending process, the second bending process bending the lead wire portions using the connection parts as fulcrums so that the lead wire portions approach the end surface of the stator core along the circumferential direction of the stator, so that the lead wire approaches the end face of the stator core from the axial direction using the connection portion as a fulcrum.