Method of clamping rails for pressure welding the same and clamping apparatus therefor

摘要

When forcing together the mating end faces of a pair of rails into contact and pressure welding the rails, the clamping operation of each rails end is effected by dividing it into a vertical positioning clamping and a lateral positioning clamping performed independently of the former. With the contacting end faces being interposed, each of the two rail ends is first forced upward at the chins of each rail below the head thereof to press the upper surface of each rail against the lower surface of a leveler which establishes a preliminarily adjusted reference level. Then, each of the rail ends is clamped by a pair of clamping means which are pressed against the sides of the web of the rail from both sides. At this time, one of the clamping means pressed against one side of the rail web forces the rail web to a preliminarily adjusted reference position with a relatively strong force and the other clamping means pressed against the other side of the web forces the web in the opposing direction with a weaker force.