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A Method of Solving Wave Shape Between Racks by Proportional Convexity Variation Coefficient

A technology of proportional convexity and variation coefficient, which is applied in the direction of contour control, etc., to achieve the effect of reducing roll changing time and reducing roll consumption

Active Publication Date: 2021-07-09
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For example, in the literature reported above, it is not found that by adjusting the proportional crown variation coefficient, the simultaneous control of the crown and wave shape of each stand of hot continuous rolling can be realized.

Method used

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  • A Method of Solving Wave Shape Between Racks by Proportional Convexity Variation Coefficient
  • A Method of Solving Wave Shape Between Racks by Proportional Convexity Variation Coefficient
  • A Method of Solving Wave Shape Between Racks by Proportional Convexity Variation Coefficient

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Embodiment

[0038] The method for solving the wave shape between racks through the proportional convexity variation coefficient of the present embodiment includes the following steps:

[0039] (1) Determine the proportional convexity change coefficient Pi of each rack, and the determination method is as follows:

[0040] (101) According to the crown control ability of each stand itself and the position of the stand in the whole unit, the conventional hot continuous rolling finishing mill is composed of 7 rolling stands. 3 racks, that is, F5 to F7 racks are the rear racks;

[0041] (102) The sum of the proportional convexity change coefficients of each rack is 1, that is, P1+P2+P3+P4+P5+P6+P7=1; among them, the proportional convexity change of the front rack is allowed, in order to ensure that the inter-rack board The shape and the outlet of the unit have good straightness, and the proportional convexity change of the rear frame is 0, that is, P5=P6=P7=0;

[0042] (103) In order to deter...

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Abstract

The invention relates to a method for solving the wave shape between racks through the proportional crown variation coefficient, which comprises the following steps: determining the proportional crown variation coefficient of each rack, determining the target crown of the product, configuring the intermediate billet crown, and calculating the Steps such as frame convexity value. The method provided by the present invention to solve the wave shape between the racks through the coefficient of proportional crown variation can ensure that the crown of the strip head fully reaches the target value (that is, ensure that the outlet crown of each rack is within the range of equipment capabilities, which is the full The long crown reaches the target value to establish the precondition), and it can ensure that there will be no waves between the racks and the exit of the finishing rolling unit, especially between the racks in the post-finishing section (such as between F5, F6 racks and F6, F6, The flatness of the strip between the F7 racks can ensure the stability of strip threading when rolling thin gauges, and finally extend the rolling plan by at least 15%, reducing the time for changing rolls and reducing the consumption of rolls.

Description

technical field [0001] The invention relates to a method for solving the wave shape between racks through the coefficient of proportional convexity variation, and belongs to the technical field of steelmaking. Background technique [0002] The hot continuous rolling process of finishing rolling is usually composed of 7 or 6 or even 5 finishing mills, rolling intermediate billets of different thicknesses into strips of various widths (0.8-25) mm in thickness. When producing thin-gauge products, the shape quality of the strip between the racks and the finish rolling exit not only relates to the shape quality of the product, but more importantly, involves the success of strip threading and the stability of rolling. The strip shape control system mainly includes the control of crown and flatness (model setting and control of bilateral waves and intermediate waves, that is, symmetrical wave shape), and the straightness between racks depends on the strip convexity of each rack. d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/28
CPCB21B37/28
Inventor 夏小明谭耘宇汪明新李美华方少华
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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