Wedge shape control system and method with off-tracking protection function

A control system, wedge-shaped technology, applied in contour control, rolling force/roll gap control, metal rolling, etc., can solve the problems of slow response, deviation of scrap, and low accuracy

Active Publication Date: 2019-04-05
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing wedge control technology mainly relies on the operator to manually intervene the leveling value on both sides of the rolling mill to control the strip wedge, which is slow in response and low in accuracy, and it is easy to cause deviation accidents

Method used

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  • Wedge shape control system and method with off-tracking protection function
  • Wedge shape control system and method with off-tracking protection function
  • Wedge shape control system and method with off-tracking protection function

Examples

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Effect test

Embodiment

[0092] For 1780 hot rolling production of a carbon steel strip product of a certain specification, the specification is 3.2×1450mm, and the target wedge shape is ≤20μm, the above method is used for control.

[0093] (1) Detection and dead zone processing of the exit wedge value of finishing rolling:

[0094] The wedge-shaped actual value We detected by the multi-function instrument for finishing rolling, if W e ≤δ (δ is the allowable value, take ±5um), then no adjustment will be made.

[0095] (2) Determination of adjustment rack

[0096] The finishing rolling F4-F7 is selected as the adjustment stand, that is, under the condition that the wedge-shaped deviation detected at the finish-rolling exit exceeds the allowable range, the bending force of the F4-F7 stand is dynamically adjusted to make the strip wedge shape reach the target range.

[0097] (3) Determination of the adjustment amount of each rack

[0098] Calculate the unilateral roll gap adjustment amount of each fra...

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Abstract

The invention provides a wedge shape control system and method with an off-tracking protection function. In order to control the intra-plate deviation in the rolling process of strip steel, through aprocess computer, a basic automatic control machine, a multifunctional instrument and a corresponding action executing end, roll gap control, with centering as the datum, of bending rolls is built forracks at a finish rolling outlet. According to the wedge shape control system and method with the off-tracking protection function, the single-side rolling reduction of all the finish rolling racks is real-timely dynamically adjusted according to the deviation between a wedge shape value detected by the multifunctional instrument, and a target wedge shape value to ensure that the overall-length wedge shape of the strip steel is in a certain interval; and meanwhile, in the real-time dynamic adjusting process, an adjusting model taking centering as the datum, synthesizing four elements of rolling mill rigidity, plastic deformation, thickness and width and constituted according to the regression thought is built by considering centering data of the finish rolling outlet, overall balance adjusting is carried out according to the model, wedge shape rolling and the final strip steel wedge shape are improved, and meanwhile rolling stability of hot rolling and plate shape quality of a strip steel product are improved.

Description

technical field [0001] The invention belongs to the field of shape control of strip steel rolling, and in particular relates to a wedge shape control system and method with deviation protection. Background technique [0002] Hot-rolled strip steel is an important steel product, and hot rolling is one of the main methods of hot-rolled strip steel production. Figure 4 Shown is a typical hot-rolled strip production schematic. The production process generally includes slab heating, high-pressure water descaling, rough rolling, head and tail cutting, finish rolling, laminar cooling, and coiling. [0003] Wedge is a shape problem that often occurs in the production of hot-rolled strip steel. With the existence of wedge, there are usually camber and unilateral corrugated defects in the strip, which have extremely adverse effects on production stability and user use. Such as Figure 5 As shown, the so-called wedge shape refers to the difference in the thickness of the representat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/28B21B37/58
CPCB21B37/28B21B37/58B21B2263/04B21B2271/02
Inventor 刘运华张勇张国民暴文帅焦四海
Owner BAOSHAN IRON & STEEL CO LTD
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