MAKING BUTT WELD JOINT BETWEEN REINFORCING BARS Russian patent published in 2014 - IPC B23K33/00 B23K9/25 

FIELD: metallurgy.

SUBSTANCE: reinforcing bars and straps are arranged with gaps between their ends. Lengthwise connection welds are built up between said strap and bars. Said welds are composed by at least two plies. Said welds are made in staggered order with weld build-up on first side of reinforcing bar and, then on second bar side located in diagonal. Thereafter, welds are consecutively built up on remaining sides of the first and second bars. Every next build-up is performed after cooling of previous weld to 100-150°C. In case bars are arranged horizontally, welds are applied starting from strap edges to its centre. In case bars are arranged horizontally, welds are applied starting from bottom to top.

EFFECT: full strength welds, minimum bar metal softening in weld seam side.

4 cl, 2 dwg, 4 ex, 1 tbl