Finish rolling method for production of round cross-sectional shape materials

Abstract From the Canadian patent

In the rolling of metal material to round crosssectional shape through a succession of three roll stands with the horizontal-horizontal-vertical or vertical-vertical-, horizontal rolls arranged in this order in the rolling down direction for achievement of increased accuracy of dimensional control at finish, an initial metal stock of specific oval cross-section is rolled to an intermediate and small reduction through the first and second stands forming specific oval groove, and then to a finish and small reduction through the third stand forming a round groove.