| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.25 ( September 1991 ) Special Issue on 'H-Shapes with Fixed Outer Dimension' and 'Steel Pipe' ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Development of Chance-Free Bulge Roll (CBR) Forming Process for Manufacturing ERW Pipe Takaaki Toyooka, Yuji Hashimoto, Kunihiko Kobayashi, Susumu Itadani, Tsutomu Ide, Yasuo Nishida |
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Synopsis : In response to the increased demand for greater product variety of ERW pipe, Kawasaki Steel Corp. has developed a new forming process for manufacturing ERW pipe named the chance-free bulge roll forming process, that is, CBR forming process & mill. This process is characterized by the new forming flower and new mechanism of the mill, and has been researched and developed using an experimental model mill and a CBR forming pilot mill. On the basis or the results of the above-mentioned efforts the actual CBR mill designed by Kawasaki Steel was installed in June 1990 at Chita Works and has been operating more than satisfactorily. This process has achieved not only high flexibility of forming rolls but also high productivity, excellent formability, and high quality of welded seams and pipe. ERW high-grade, high quality stainless steel pipe has been satisfactorily produced in CBR forming mill. |
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