Method and device for manufacturing cold rolled metal sheets or strips
AssigneeSidmar N.V.
InventorsCarl De Mare, Yves Gadeyne
Life of this patent
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Abstract
Method of producing metal sheets or strips by rolling a metal sheet or strip through cold rolling mills, characterized in that at least two work rolls (2) are textured according to a surface pattern consisting in a regular deterministic bidimensional patter in the form of unit cells of spots, said spot being obtained through an electron beam irradiation (12) and in that the wavelengths in the longitudinal direction .lambda..sub.L ! of the rolls and in the transverse direction .lambda..sub.L ! of the rolls are less than 1.5 mm.
Claims10
Method of producing metal sheets or strips by rolling a metal sheet or strip through cold rolling mills, characterized in that at least two work rolls are textured according to a surface pattern consisting in a regular deterministic bidimensional pattern in the form of unit cells of spots, said spot being obtained through an electron beam irradiation and in that interference wavelengths in a longitudinal direction of the pattern on the rolls and in the transverse direction of the rolls are less than 1.5 mm wherein .gamma..sub.L and .gamma..sub.Q are defined as follows:
- ##EQU17## wherein dl.sub.1 =max dl.sup.A, dl.sup.B !
- dl.sub.2 =min dl.sup.A, dl.sup.B !
- dq.sub.1 =max n.sup.A dq.sup.A, n.sup.B dq.sup.B !
- dq.sub.2 =min n.sup.A dq.sup.A, n.sup.B dq.sup.B !
- k,l=an integer so that the denominator is minimum
- m=min n.sup.A, n.sup.B !
- dl=the distance between two spots in the circumferential direction of the roll
- dq=the distance between two spots in the axial direction of the roll=n.dA
- dA=distance between two circumferences in the axial direction
- n=number of windings on the roll before the crater has the same circumferential position on the roll, n is an integer or a real number
- Superscript A=regarding the first textured work roll
- Superscript B=regarding the second textured work roll.
Device for producing metal sheets or strips by cold rolling a metal sheet or strip characterized in that it comprises at least two work rolls which are textured according to a surface pattern consisting in a regular deterministic bidimensional pattern in the form of unit cells of spots, said spots being obtained through an electron beam irradiation and in that interference wavelengths in a longitudinal direction of the pattern on the rolls and In the transverse direction of the roll are less than 1.5 mm.
Dependencies are inferred from the claim text.