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US 6,564,608 B2Granted
Rolling method and line for rails or other sections
AssigneeDaniel & C. Officine Meccaniche S.P.A.
InventorsLoris Maestrutti, Giorgio Lavaroni, Stefano Zuttion
Life of this patent
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Abstract
Rolling method and line for rails or other sections starting from a steel bar, including a roughing step and a finishing step. The roughing step provides use of a two-high reversible roughing stand, or BDM (Break-Down Mill), associated with a reversible edging stand (RES), which can be located irrespectively upstream or downstream of the BDM stand.
Claims27
A rolling method for sections starting from a steel bar, comprising:
- a roughing step to shape said steel bar into a roughened shape comprising:
- passing said steel bar through a Break-Down Mill (BDM) stand, the BDM stand comprising a two-high reversible roughing stand, and
- passing said steel bar through at least a Reversible Edging Stand (RES) located irrespectively upstream or downstream of said BDM stand,
- wherein said RES comprises two first working rolls shaped to define one grooved profile having a cross-section substantially rectangular or squared, and said steel bar passes at least once through said grooved profile of said two first working rolls,
- wherein said BDM stand has second working rolls shaped to define a plurality of grooved profiles, wherein said plurality of grooved profiles comprises a first grooved profile with a substantially rectangular cross-section, and said steel bar passes at least once through said first grooved profile of said second working rolls, and
- wherein said grooved profile of said first working rolls is substantially aligned with said first grooved profile of said second working rolls,
- wherein said steel bar performs at least one step selected from the group consisting of passing from the first grooved profile of said second working rolls to said grooved profile of said two first working rolls and passing from said grooved profile of said two first working rolls to said first grooved profile of said second working rolls;
- and
- a finishing step comprising finishing said steel bar having a roughened shape after the roughing step.
6 more elements
A rolling line for sections starting from a steel bar, comprising:
- a roughing assembly comprising:
- a Break-Down Mill (BDM), said BDM comprising at least a two-high reversible roughing stand, able to receive at inlet said steel bar, and
- a Reversible Edging Stand (RES) located irrespectively upstream or downstream of said BDM stand,
- wherein said RES comprises two first working rolls shaped to define one grooved profile having a cross-section substantially rectangular or squared,
- wherein said BDM stand has second working rolls shaped to define a plurality of grooved profiles, wherein said plurality of grooved profiles comprises a first grooved profile with a substantially rectangular cross-section for passing said bar therethrough at least once, and
- wherein said grooved profile of said first working rolls is substantially aligned with said first grooved profile of said second working rolls, and
- a finishing train arranged downstream of said roughing assembly.
4 more elements
Dependencies are inferred from the claim text.