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Steel rail cross section specification full-length fluctuation control method

A rail section and control method technology, applied in the direction of rolling mill control devices, metal rolling, manufacturing tools, etc., can solve the problems of large thickness error, small compensation value, complex shape, etc., to improve product quality and cross-section specification general length deviation Reduced effect

Active Publication Date: 2014-05-28
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This patent application must use a thickness gauge to obtain the thickness deviation of the rolled plate to correct the subsequent rolling thickness. It is corrected based on the parameters of the online rolled piece. The correction itself has a certain hysteresis, especially There is no data to correct the section of plate that has just been rolled, so the thickness error of the section of plate that has just been rolled is relatively large; the execution of the final parameters is realized through the input of L2 level; and because the patent is dedicated to Sheet metal, the shape control of the sheet metal is mainly related to the two factors of the reduction (roll gap) and the roll shape curve. In addition to other factors, the extension and deformation of the head, waist, and bottom also have mutual influences. Therefore, this method cannot be directly applied to the size fluctuation control of rails with complex sections. Shape Compensation Control Method

Method used

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  • Steel rail cross section specification full-length fluctuation control method
  • Steel rail cross section specification full-length fluctuation control method
  • Steel rail cross section specification full-length fluctuation control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0138] Such as image 3 , Figure 4 , Figure 5 with Figure 6 , Figure 7 As shown, taking the rolling 60kg / mU75V rail as an example, the standard bottom width F is 150mm, and the layout of the rolling mill is shown in image 3 , 60kg / mU75V rail adopts seven racks to produce rails, the blanking unit consists of two racks, which are respectively billeting machine BD1 and billeting machine BD2, the universal rolling mill has five racks, and three universal rolling mills are universal rolling mill U1, The universal rolling mill U2 and the universal rolling mill UF have two edging stands, respectively the first edging machine E1 and the second edging machine E2, according to image 3 When the rolling mills of the process layout roll the rails, the universal rolling mill UF, the second edge rolling mill E2, and the universal rolling mill U2 each roll one pass, while the first edge rolling mill E1 rolls two passes, and the universal rolling mill U1 rolls three passes. In its c...

Embodiment 2

[0151] Such as image 3 , Figure 4 , Figure 5 with Figure 8 , Figure 9 As shown, another batch of 60kg / mU75V steel rails is normally rolled and the rolling mill layout is the same as that of Embodiment 1. For the rolling mill layout process diagram, see image 3 ,according to image 3 When the rolling mills of the process layout roll the rails, the universal rolling mill UF, the second edge rolling mill E2, and the universal rolling mill U2 each roll one pass, the first edge rolling mill E1 rolls two passes, and the universal rolling mill U1 rolls three passes , but the details of the rolling process are slightly different, and the method of the present invention is used to control the rolling of another batch of 60kg / mU75V steel rails.

[0152] I. According to the normal rolling situation, analyze the detection curve of each size of the cross section of 60kg / mU75V under normal rolling situation, and obtain the fluctuation of the cross section specification length acc...

Embodiment 3

[0164] Such as image 3 , Figure 4 , Figure 5 with Figure 10 , Figure 11 As shown, taking the rolled 60kg / mU75V rail as an example, the standard rail height H is 176mm, and the layout of the rolling mill is shown in image 3 , 60kg / mU75V rail adopts seven racks to produce rails, the blanking unit consists of two racks, which are respectively billeting machine BD1 and billeting machine BD2, the universal rolling mill has five racks, and three universal rolling mills are universal rolling mill U1, The universal rolling mill U2 and the universal rolling mill UF have two edging stands, respectively the first edging machine E1 and the second edging machine E2, according to image 3 When the rolling mills of the process layout roll the rails, the universal rolling mill UF, the second edge rolling mill E2, and the universal rolling mill U2 each roll one pass, while the first edge rolling mill E1 rolls two passes, and the universal rolling mill U1 rolls three passes. In its c...

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Abstract

The invention discloses a steel rail cross section specification full-length fluctuation control method. The method comprises obtaining the distribution length l of the full-length fluctuation abnormal part of each dimension of the cross section on a steel rail and the mean deviation of all dimension fluctuations of the cross section according to the steel rail cross section dimension detection curve under the normal steel rail rolling condition, determining the compensation part on the steel rail cross section, and determining the compensation value of a rolling part corresponding to the compensation part; selecting a compensation rolling mill and a compensation pass according to the rolling part and the compensation value, and determining the compensation amount of the compensation pass; determining to-be-compensated length L and compensating for the to-be-compensated length L of the steel rail during rolling; and when the to-be-compensated length L is reached, allowing the roll gap S at the rolling part on the compensation rolling mill to restore to the normal roll gap s, and allowing the displacement value Y to restore to the normal displacement value y. The method provided by the invention effectively controls steel rail cross section specification full-length fluctuation, reduces rolling deviation, requires no additional equipment and is mainly used for steel rail rolling control.

Description

technical field [0001] The invention relates to a method for controlling fluctuations in rail size, in particular to a method for controlling fluctuations in the length of rail section specifications. Background technique [0002] The rails produced by the automatic control of the universal production line all have the problem of fluctuations in the length of the cross-section specification, that is, the deviation of the cross-section specification is relatively large. Rails of different specifications and materials have different lengths and deviations of section specification fluctuations, but the common point is that the end pointing to the direction of the rolling mill usually has a section in the "fluctuation section" of 0 to 15 meters (corresponding to the rail height) in the length direction. The fluctuation range of specifications is higher than that of other parts, and the rolling force is not much different in the overall length direction. AGC compensated by rollin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/16
Inventor 陶功明赵云王彦中杨伟程铖贾济海甘鹏赵德伟
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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