the bogies of railway development

摘要

This invention relates to a railway bogie comprising a bolster secured between two hollow section side frames, in which the bolster ends are flanged and each is welded around its edge to the surface of a mating aperture or recess in the inner side of the side frame. The bolster section is strengthened, at least in the area of the flange, by stiffening ribs. The recess may be constituted by either an integrally formed shoulder ring or a separate backing ring secured around the aperture. Depending on the weld classification required, this ring may be removed so as to expose the inner weld seal, a weld bead then being laid from the inside.