METHOD FOR MANUFACTURING A COMMUTATOR

摘要

METHOD FOR MANUFACTURING A COMMUTATOR A disk armature for an electric, in-tank fuel pump motor is manufactured by laser welding a pair of annular disks in two concentric circles of spot welds, one near each of the inner and outer circumferences of the disks. One disk is made of malleable copper for the forming of commutator hooks and studs; the other is made of hardened copper alumina for superior wear characteristics in a sour gasoline environment. The welded disks are affixed to an insulating support and cut into segments, each having at least one weld from the inner circle and two from the outer circle. Thus the segments are each securely welded without deformation or degredation of the superior wear properties of the copper alumina disk.