Method for manufacturing a commutator.

摘要

A disk armature for an electric, in-tank fuel pump motor is manufactured by laser-welding a pair of annular disks (20, 21) together using two concentric circles of spotwelds (16), one circle near each of the inner (25) and outer (26) circumferences of the disks. One disk (20) is made of malleable copper for the forming of commutator hooks and studs (12, 13); the other disk (21) is made of hardened copper alumina for superior wear characteristics in a sour gasoline environment. The welded disks (20,21) are affixed to an insulating support (11) and cut into segments (15), each having at least one weld (16) from the inner circle and two welds (16) from the outer circle. Thus the segments (15) are each securely welded without deformation or degradation of the superior wear properties of the copper alumina disk (21