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A kind of variable contact backup roll for rolling plate and strip and its processing method

A technology of supporting rolls and variable contact, applied in metal rolling, metal rolling, manufacturing tools, etc., can solve problems such as inability to adjust roll shape

Inactive Publication Date: 2011-11-30
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when l' and h' are fixed for the roll shape, the radius r' has been determined, and the chamfering form has also been determined, and the roll shape cannot be adjusted according to the contact between the rolls.

Method used

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  • A kind of variable contact backup roll for rolling plate and strip and its processing method
  • A kind of variable contact backup roll for rolling plate and strip and its processing method
  • A kind of variable contact backup roll for rolling plate and strip and its processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0111] The roll shape curve is designed with the coefficients selected in Table 1, such as Figure 7 As shown in the middle roll shape 1, it can be seen that when all roll shape angles are taken as 0, the roll shape is a conventional flat roll.

[0112] Table 1

[0113] Coefficient

Embodiment approach 2

[0115] The roll shape curve is designed with the coefficients selected in Table 2 as Figure 7 As shown in the middle roll shape 2, it can be seen that the roll shape has obvious variable contact characteristics. Since the selection of the shape angle is small and the roll shape adjustment coefficient is selected to the maximum value, the depth of the variable contact section and the chamfer section of the roll shape curve are uniform. Larger, the maximum roll diameter difference of the roll shape has reached more than 2.5mm, and this roll shape is generally suitable for occasions with large rolling forces.

[0116] Table 2

[0117] Coefficient

Embodiment approach 3

[0119] The roll shape curve is designed with the coefficients selected in Table 3 as Figure 7 As shown in the middle roll shape 3, it can be seen that the roll shape has variable contact characteristics, and the maximum roll diameter difference is about 1.4mm, which is generally suitable for the upstream stand of the hot rolling mill.

[0120] table 3

[0121] Coefficient

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Abstract

The invention relates to a variable contact support roll for rolling a plate and a strip and a processing method thereof. The roll shape curve is superimposed by five-segment sine functions, which can make the length of the contact line between the backup roll and the work roll similar to the width of the rolled strip, reduce the harmful contact area during the rolling process, and improve the control effect of the bending force , to increase the lateral stiffness of the roll gap, and at the same time, it can evenly contact the pressure between the rolls, and reduce or eliminate the occurrence of peeling accidents at the edge of the support roll. In the grinding process of the roll shape, the superimposed roll shape of the variable contact section and the chamfer section on both sides are firstly ground, and then the whole roll body is ground to achieve the purpose of improving the processing efficiency and reducing the consumption of the grinding wheel. The roll shape design and processing of the backup roll of the invention are convenient, and industrial application is easy to realize.

Description

technical field [0001] The invention relates to a back-up roll shape and a processing method thereof, which are used for strip shape control and can reduce roll consumption in strip steel production, and belong to the roll shape design in the field of strip rolling. Background technique [0002] In the field of strip production, the initial roll shape of the backing roll is a conventional crown roll or a flat roll. Since the conventional roll shape does not have the ability to control the shape of the strip and is prone to peeling accidents of the backing roll, it has gradually been changed to a contact backing roll shape. And the edge chamfering is replaced by the roll shape of the supporting roll. [0003] (1) Variable contact support roll shape [0004] In order to solve the problem of uneven wear of the backup rollers and improve the shape control ability of the backup rollers, Patent 1 (ZL91229974.6, 1993.12.22), Document 1 (Chen Xianlin, Yang Quan, Zhang Qingdong, et ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B29/00
Inventor 李洪波张杰曹建国杨光辉
Owner UNIV OF SCI & TECH BEIJING
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