Rigid frog for direction change points, at a railway permanent way, has two control half-rails bonded together by electron beam welding with an air gap between their webs

摘要

The frog for direction change points, at a railway permanent way, is a rigid unit with two control half-rails (2,3), bonded together by electron beam welded seams (6,6') at their rail heads (7,8) and feet (4,5). An air gap (9) is between the half-rail webs (11). The welded seams have a depth of 25-35 mm, and the air gap has a width of 1.5 mm.