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US 5,287,715 AGranted
Method of rolling steel shapes and apparatus therefor
AssigneeSumitomo Metal Industries, Ltd.
InventorYoshiaki Kusaba
Life of this patent
Estimating the term…
Abstract
A method and apparatus for rolling parallel-flange steel shapes under hot conditions through reversing rolling in a universal mill group are disclosed. The mill group comprises a first universal mill, an edging mill, and a second universal mill. The web height of the steel shape is finished to a final target size by a final pass in the second universal mill, or the inner web length is finished to a final target size by reducing the web weight by a first pass in the first universal mill before carrying out the reversing rolling.
Claims12
A method of rolling parallel-flange steel shapes comprising steps of:
- forming a parallel-flange steel shape by reversing rolling steel under hot conditions in a universal mill group comprising a first universal mill, an edging mill, and a second universal mill wherein the steel is sequentially rolled by each of the first universal mill, the edging mill and the second universal mill during the reversing step and horizontal rolls of the second universal mill are of the variable-width type and taper of lateral faces of the horizontal rolls and edging rolls are from 0 to 2.0 degrees for each of the first universal mill, edging mill and second universal mill;
- and
- finishing a web height of the steel shape to a final target size by a final pass in the second universal mill.
Dependencies are inferred from the claim text.