FIELD: process engineering.
SUBSTANCE: invention relates to arc welding. Set of ribs is arranged on metal sheet, locked thereat and welded thereto. First, grooving is made on rib every side. Ribs are locked at metal sheet with clearance. Every rib is welded in turns, on opposite sides. Before first welding pass, forming pad composed of holder provided with a set of spring-loaded ceramic pads are fitted in said grooving and clamped across rib being welded on side opposite the welding. Said holder has, for example, bent edges with pads arranged there between to displace therein in assembly. Forming pad features triangular shape with vortex angle equal to the of grooving while vertices are rounded to radius equal to clearance between rib and sheet. After said first pass, sais pad is removed.
EFFECT: higher quality and efficiency.
4 cl, 1 dwg
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