METHOD OF HIGH-FREQUENCY WELDING OF SECTIONS OF SURFACE-RIB TYPE Russian patent published in 1998 - IPC

FIELD: production of sections of the surface-rib type, in particular, T-sections, H-sections, ribbed pipes. SUBSTANCE: the rib and surface are brought together forming a V-slot with the apex in the convergence point. The surface and rib are overheated by passage of high-frequency current. The current leads are installed at definite distances from the convergence point along the axis of welding. The preheating zone is located between the current lead to the surface and the convergence point. The surface and rib are compressed in the convergence point. The current lead to the rib is positioned at a distance from the convergence point, depending on the rib thickness. The length of the surface heating element is determined, depending on the mentioned distance and welding speed. EFFECT: optimized welding conditions. 1 dwg, 2 tbl