INFLUENCE OF EDGE CONDITION OF SLIT-STEEL STRIP ON WELDING QUALITY OF SMALL SIZED HEAVY-WALLED WELDED PIPE AND RELEVANT CONTROL MEASURES

Factors concerning the slit-strip which are responsible for the welding quality are analyzed. The result from the operation of slitting the strip for 7-8mm heavy welded pipes for automobile drive shaft and oil pump shows that proper adjustment of the slitter knives gaps in both horizontal and vertical directions will bring about satisfactory strip edge, which means much better welding quality.