Abstract: A method and apparatus is provided for welding an edge surface of a curved metal brake shoe to a substantially flat metal brake shoe table surface. The apparatus has a positioning mechanism which positions the brake shoe table in longitudinal alignment with the brake shoe web with one end portion of the table surface abutting the brake shoe web surface over a predetermined distance and with the table surface diverging away from the brake shoe web edge forming a vertex where the surfaces abut. A wheel is provided for pressing the abutting surfaces together at the vertex. Conductors are used to contact both the brake shoe web and the brake shoe table to provide a high frequency alternating potential to the pieces to induce current to flow therebetween and thereby heat the interfacing surfaces in the area of the vertex.

Abstract: A method and apparatus is provided for welding an edge surface of a curved metal brake shoe to a substantially flat metal brake shoe table surface. The apparatus has a positioning mechanism which positions the brake shoe table in longitudinal alignment with the brake shoe web with one end portion of the table surface abutting the brake shoe web surface over a predetermined distance and with the table surface diverging away from the brake shoe web edge forming a vertex where the surfaces abut. A wheel is provided for pressing the abutting surfaces together at the vertex. Conductors are used to contact both the brake shoe web and the brake shoe table to provide a high frequency alternating potential to the pieces to induce current to flow therebetween and thereby heat the interfacing surfaces in the area of the vertex.

Abstract: A method and apparatus for welding an edge surface of a curved metal brake shoe web to a metal brake shoe table surface. The metal brake shoe table surface has a greater radius of curvature than the brake shoe web edge. The brake shoe table is positioned in longitudinal alignment with the brake shoe web with one end portion of the table surface abutting the brake shoe web surface over a predetermined distance and with the table surface diverging away from the brake shoe web edge surface forming a vertex where the surfaces abut. The abutting surfaces are pressed together at the vertex thereby moving the diverging surface of the brake shoe table into contact with a first conductor which is spaced from the vertex. A positive electrical connection is provided between the brake shoe web and the second conductor.

Abstract: A method is provided for welding an edge surface of a curved metal brake shoe web to a metal brake shoe table. The brake shoe table surface has a greater radius of curvature than the brake shoe web prior to welding. The method consists of the steps of positioning the brake shoe table in longitudinal alignment with the brake shoe web with one end portion of the table surface abutting the brake shoe web surface over a predetermined distance and with the table surface diverging away from the brake shoe web edge to form a vertex where the surfaces abut. The abutting surfaces of the brake shoe web and the brake table are then pressed together at the vertex. The diverging surfaces of the brake shoe web and the brake table are contacted by separate electrodes. The high frequency alternating potential is then provided to each of the electrodes contacting the table and the web to induce a current to flow therebetween and thereby heat the interfacing surfaces in the area of the vertex.

Abstract: A weld joint configuration facilitating the connection of two closely positioned workpieces having spaced apart end surfaces comprising sidewalls of a weld joint space. One of said workpieces has a tongue projecting therefrom that is received at least in part in a groove formed in the other of the workpieces. The interface between the tongue and a surface of the other workpiece partially defining the groove comprises a weld joint parting line. An extension projecting from at least one of the workpieces provides workpiece material located between this parting line and the weld joint space. When the workpieces are welded electrode material and the extensions are mixed to form a composite weld having a root portion with a parting line extending substantially tangentially from the root portion.