Patent ID: 9680358
Date: 2017-06-13
CPC Classifications: H02K,Y10T

Claim:
1. A method for manufacturing a winding body that is used in an armature winding for an electric machine, said winding body being configured by winding a jointless continuous conductor wire that is coated with insulation into a helical shape for m turns, where m is a natural number that is greater than or equal to two, so as to comprise: rectilinear portions that are arranged into two columns such that m of said rectilinear portions line up in each of said columns; and coil ends that link together end portions of said rectilinear portions between said columns, each of said coil ends comprising: a bulging portion; a pair of inclined portions that link said bulging portion and said rectilinear portions; and a crank portion that is formed on a central portion of said bulging portion, and that displaces said rectilinear portions that are linked by said coil end by a set amount in a direction of arrangement of said rectilinear portions, wherein said method for manufacturing a winding body that is used in an armature winding for an electric machine comprises: a bulging portion forming step in which said bulging portions are formed by bending at a set pitch on said conductor wire; a crank portion forming step in which said crank portions are formed by bending on said central portions of said bulging portions; a rectilinear portion forming step in which said rectilinear portions are formed by bending on said conductor wire on which said bulging portions are formed at a set pitch and on which said crank portions are formed on each of said bulging portions after completion of said bulging portion forming step and said crank portion forming step; and an inclined portion forming step in which said inclined portions are formed by bending on said conductor wire on two sides of said bulging portions before said rectilinear portion forming step.