MILL FOR ASSEMBLING AND WELDING STRAIGHT-SEAM PIPES Russian patent published in 2017 - IPC B21C37/08 

FIELD: machine engineering.

SUBSTANCE: mill contains an elevated frame with guides on which a welding bridge is mounted with the possibility of motion, carrying welding equipment with a first welding head designed for applying a weld seam from the outside of the pipe blank. In span of support posts of overpass there is a system of tube blank turning and assembly mandrels, each of which contains mechanism for clamping longitudinal edges of the pipe blank. The mill is equipped with cantilever bar mounted in supporting assembly with second welding head designed for applying an outer weld seam, a clamping mechanism is made in the form of hydraulic stops. The pipe blank turning system is mounted with possibility to move a welding trolley with rotary rollers for positioning the blank for welding along a guide, and support-and-turning rollers located close to assembly mandrels and installed with the possibility of separation and convergence until tight to the blank surface. Control system is introduced into the mill.

EFFECT: application of weld seams from inside and outside of the pipe blank in different sequence using different technologies, with the observance of geometrical accuracy of convergence of pipe blank edges of different diameters.

4 cl, 2 dwg