WELDING PROCESS OF STRIPS BEFORE COLD ROLLING Russian patent published in 2009 - IPC B21B1/28 

FIELD: metallurgy.

SUBSTANCE: welding process of strips before rolling includes preparation of groove face, its joining and further welding of strips in a butt joint. Preparation of groove faces is implemented by means of cutting of trailing end of the previous strip and leading end following in the herringbone line with at vertex from more than 150° up to 170°, vertex of which is located on the axis of strip by its movement. Additionally there are reduced dynamic loads on strip in deformation area of weld seam, it is reduced probability of strip rupture and increased productivity of mill, in connection with necessity absence of rolling rate reduction at passing of weld seam area.

EFFECT: improvement of plastic working quality of butt-weld strips on cold-rolling mill.

3 dwg, 3 ex