Patent ID: 9682439
Date: 2017-06-20
CPC Classifications: B23B,B23K,Y10T

Claim:
1. A welding electrode comprising a body with a round, spherically domed weld face for contact of the spherically domed face with a workpiece in an electrical resistance welding operation, the spherically domed weld face comprising concentric circular rings of ridges that are separated by surfaces of the spherically domed weld face such that the concentric circular rings of ridges are spaced from each other radially from a center of the spherically domed weld face, the concentric circular rings of ridges being positioned to contact and impress into a workpiece surface with each of the individual ridges projecting outwardly from the surfaces of the spherically domed weld face that are adjacent thereto, the concentric circular rings of ridges having height dimensions in the range of twenty micrometers to two hundred micrometers and spacings between ridge heights in the range of eighty micrometers to fifteen hundred micrometers, and wherein the material of the concentric circular rings of ridges is susceptible to degradation in welding operations.