DEVICE FOR FORMING AND WELDING PIPE LENGTHWISE SEAMS Russian patent published in 2013 - IPC B21C37/08 

FIELD: process engineering.

SUBSTANCE: invention relates to forming and welding of lengthwise seams in thin-wall small-diameter pipes made, primarily, of stainless steels. Device foundation 1 accommodates last stand of forming mill with bottom forming roll and top seam guide roll, mechanism of radial and axial adjustment of rolls, means 3 to act at tube billet lengthwise edges, welding assembly 4 and seam squeezing stand 5. Said means 3 to act at tube billet lengthwise edges is composed of to seam guide roll 8 fitted lateral cylindrical journals to run in plain bearings and to turn from hydraulic cylinder around roll pins. Housing accommodates seam guide rolls. At housing top section welding assembly 4 equipped with lengthwise adjustment mechanism with retainer is mounted. Housing top section has horizontal opening accommodating said lengthwise adjustment mechanism with retainer.

EFFECT: higher quality of tube welding by arc and laser processes, smaller sizes and metal input, higher reliability.

7 dwg