Work roll capable of improving edge drop control capability

Abstract

The invention relates to the technical field of steel rolling, in particular to an end contour of a work roll capable of improving edge drop control capability. The end contour of the work roll is shown as a polynomial power function curve, and is characterized in that an intersection point of an extended line of the work roll body and an extended line of an end line is taken as an origin, the axial direction of the work roll is taken as an x-axis, and the radial direction of the work roll is taken as a y-axis; and the functional equation of the end contour curve is shown in the specification: y(x)=a0.[a1(L-x)<2>+a2.(L-x)<4>+a3.(L-x)<6>]. The end contour of the work roll has the beneficial effects that by adopting a gradient tapered curve transition mode, the edge drop control capability of the work roll on the edge part of strip steel is well improved under a certain movement value; meanwhile, the contact stress of the roll surface can be better homogenized, thus lowering the surface wear speed of the work roll and an intermediate roll, prolonging the service life of the rolls, and reducing the production cost.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a work roll end roll shape. Background technique [0002] In the production process of rolled flat products, the roller exerts a strong extrusion force on the processed object, causing the processed object to undergo plastic deformation, so as to achieve the cross-sectional shape required by the user. However, in actual production, due to multiple influencing factors, the thickness values ​​of each part of the cross-section of the cold-rolled steel plate always fluctuate within a certain range. Based on the rolling force distribution and deformation law of the roll, the thickness distribution presents a certain law. Specifically: the closer the steel plate is to the edge, the smaller the thickness value is, and the closer the steel plate is to the middle, the relatively larger thickness value. Taking ordinary non-oriented silicon steel as an example, the difference between...

AI Technical Summary

Problems solved by technology

[0007] However, as downstream users have higher and higher requirements for the same-plate difference accuracy of cold-rolled steel sheets (especially cold-rolled silicon steel sheets), the existing traditional edge drop control accuracy has been difficult to meet the demanding needs of users, such as using traditional work rolls For cold-rolled non-oriented silicon steel and other hard sheets, the thickness difference of Edge15-Center frequently exceeds the standard of 10um, which makes the pass rate in the length direction difficult to meet user needs, directly reducing the competitiveness of cold-rolled products

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