| 摘要 |
1,226,379. Welding by fusion. CLOVER. 26 April, 1968 [28 April, 1967], No. 19892/68. Heading B3R. In electron, ion or laser beam welding thick metal parts, the parts 1, 2, Fig. 2, are formed to have abutting central portions AC between opposed welding grooves, the central portions are joined by beam welding from both sides, and inserts 6, 7 pre-formed to the required section are positioned in the grooves and beam welded. Where very thick plates are being welded, several layers of inserts of diamond or triangular section are used. The groove walls may consist of sections AK, KL of increasing angle or of staggered sections so that welds do not penetrate and re-fuse welds made earlier. For circular welds, annular inserts may be used. In a tube to plate joint, a collar 23, Fig. 8, is welded to the plate along abutting surfaces AC and annular inserts 25 are welded into grooves adjacent the surfaces AC. The tube 27 is welded to the collar 23 by internal and external weld passes. |
