Flexible Universal Rolling Technology of H-Shape & Product Development

by Tetsuya Oomori

Publisher - Large Shape Mill, Shape Div, Wakayama Works (Sakai Area), Nippon Steel and Sumitomo Metal Corporation, Japan

Category - Engineering & IT

27 years ago, we started manufacturing NS Hyper Beam® at Wakayama Work (Sakai Area) of Nippon Steel & Sumitomo Metal Corp. To achieve production of NS Hyper Beam, We have established innovative technology, “Flexible universal rolling technology”. In the manufacture of conventional H-beam, inside web height and flange depth cannot be controlled because of technical constraints. Therefore synchronous change of beam depth and width with its thickness is inevitable in a same size series. We’ve broken through constraints with flexible rolling technology. This technology includes 3 innovatory technical elements. 1. The skewed rolling mill and the free size finishing mill for flexible rolling inside web height. 2. The free size edging mill for flexible rolling flange depth. 3. The free size roller straightening machine that has variable barrel length rolls. The development of this flexible rolling technology has enabled us to manufacture uniform depth and width in a same size series. In addition, it has opened possibility of manufacturing a multi-size series, using only one set of rolls. We are manufacturing 611 sizes NS Hyper Beam® and other cross section which corresponding JIS, ASTM and EN H-beams standards. Furthermore, we have been producing Hyper Beam VE® (Value Ecology & Economy) series NSYP®345B (+20MPa yield stress), and H-beam which improve low temperature properties for onshore and offshore plant fields (CVN spec -40°C >27J). 27 years ago, we started manufacturing NS Hyper Beam® at Wakayama Work (Sakai Area) of Nippon Steel & Sumitomo Metal Corp. To achieve production of NS Hyper Beam, We have established innovative technology, “Flexible universal rolling technology”. In the manufacture of conventional H-beam, inside web height and flange depth cannot be controlled because of technical constraints. Therefore synchronous change of beam depth and width with its thickness is inevitable in a same size series. We’ve broken through constraints with flexible rolling technology. This technology includes 3 innovatory technical elements. 1. The skewed rolling mill and the free size finishing mill for flexible rolling inside web height. 2. The free size edging mill for flexible rolling flange depth. 3. The free size roller straightening machine that has variable barrel length rolls. The development of this flexible rolling technology has enabled us to manufacture uniform depth and width in a same size series. In addition, it has opened possibility of manufacturing a multi-size series, using only one set of rolls. We are manufacturing 611 sizes NS Hyper Beam® and other cross section which corresponding JIS, ASTM and EN H-beams standards. Furthermore, we have been producing Hyper Beam VE® (Value Ecology & Economy) series NSYP®345B (+20MPa yield stress), and H-beam which improve low temperature properties for onshore and offshore plant fields (CVN spec -40°C >27J).

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