Method and apparatus for rolling metal products
AssigneeDanieli & C. Officine Meccaniche SpA
InventorDaniele Andreatta
Life of this patent
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Abstract
Method for rolling metal products comprising a plurality of sequential rolling passes during which a metal product (P) is rolled. The method comprises a first rolling pass of the metal product (P) to obtain a first intermediate product (P1), a second rolling pass of the first intermediate product (P1) to obtain a second intermediate product (P2), a third rolling pass of the second intermediate product (P2) to obtain a third intermediate product (P3), a fourth rolling pass of the third intermediate product (P3) to obtain a final rolled product (L).
Claims12
Method for rolling metal products comprising a plurality of sequential rolling passes during which a metal product (P) having an initial size is rolled, the method consisting of:
- a first rolling pass of said metal product (P) to obtain a first intermediate product (P1) with a lozenge-shaped cross section, with opposite angles equal to each other and different adjacent angles;
- a second rolling pass of said first intermediate product (P1) to obtain a second intermediate product (P2) with a quadrangular shape of the cross section with angles substantially equal to each other;
- a third rolling pass of said second intermediate product (P2) to obtain a third intermediate product (P3) with a round shape of the cross section, not finished;
- and
- a fourth rolling pass of said third intermediate product (P3) to obtain a final rolled product (L) with a round, calibrated shape of the cross section.
Apparatus for rolling metal products comprising a plurality of rolling units, the apparatus consisting of:
- a first rolling unit (11) provided with first rolling rolls (15) defining a first rolling channel (16) with a lozenge shape with opposite angles equal to each other and different adjacent angles;
- a second rolling unit (12) provided with second rolling rolls (18) defining a second rolling channel (19) with a quadrangular shape, with angles substantially equal to each other;
- a third rolling unit (13) provided with third rolling rolls (21) defining a third rolling channel (22) with a round shape;
- a fourth rolling unit (14) provided with fourth rolling rolls (24) defining a fourth rolling channel (26) with a circular shape.
Dependencies are inferred from the claim text.