Continuous tube weld and stretch reducing mill - with specified arcs for reducing mill roll passes

摘要

A continuous weld and stretch reducing mill is assembled from alternating pairs of vertical and horizontal grooved rolls. The working surface of all rolls is formed by conjugate arcs of =2 radii. =1 Of the arcs has the same radius as that of the welding roll pass; the crowns of the arcs of the same radius lie in the same plane which passes through the longitudinal axis of the rolling mill. This results in a higher strength of the welded seam and in a higher precision of the tubes.