Patent ID: 8436269
Filing Date: 2013-05-07
Classification: B23B,B23K,Y10T

Abstract:
1. A welding electrode comprising an electrically conductive body with a spherically domed weld face for contact of the spherically domed weld face with a surface of an aluminum alloy or a magnesium alloy workpiece in an electrical resistance welding operation, the spherically domed weld face comprising concentric circular rings of ridges that are separated by sloped base surfaces of the spherically domed weld face, the concentric circular rings of ridges being positioned to contact and impress into the workpiece surface with each individual ridge projecting outwardly, with a constant semicircular cross-sectional profile, from adjacent sloped base surfaces of the spherically domed weld face, and wherein the material of the concentric circular rings of ridges is susceptible to degradation in welding operations.