METHOD AND APPARATUS FOR RELIEVING WELDING DISTORTION IN LONG SIZE WELDED STRUCTURE HAVING BOX SECTION

摘要

PROBLEM TO BE SOLVED: To propose a method or an apparatus for relieving welding distortion using roller rolling with respect to the welding distortion produced on longitudinal plates of a long size welded structure having a box section such as a boom to thereby improve the contents of the distortion relieving work of the welding distortion.;SOLUTION: Roller rolling is carried out by putting a vertical plate 1 between an inside roller 24a and an outside roller 41a and sliding the long size welded structure in the pressurized state as to the vertical plate 1 in the vicinity of a weld bead along the weld bead 5 of the long size welded structure ( a boom 4 or the like ) forming the box section by combining upper and lower plates 2 and two vertical plates 1.;COPYRIGHT: (C)2004,JPO