A strip-head rolling method for cold continuous rolling limit thickness strip steel

A continuous cold rolling and extreme technology, applied in the direction of metal rolling, tail end control, etc., can solve problems such as regression abnormality, slow regression process speed, and low control accuracy, so as to reduce the number of broken strips, solve welding difficulties, and improve rolling The effect of control accuracy

Active Publication Date: 2017-08-11
HIGH END EQUIP & RAIL TRANSIT TECH R & D CENT OF HAIAN TAIYUAN UNIV OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Due to the complex model relationship of the system, the regression process is slow and regression abnormalities often occur, and the control accuracy is not high

Method used

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  • A strip-head rolling method for cold continuous rolling limit thickness strip steel
  • A strip-head rolling method for cold continuous rolling limit thickness strip steel
  • A strip-head rolling method for cold continuous rolling limit thickness strip steel

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Embodiment Construction

[0038] Such as figure 1 As shown, a strip-rolling method for cold-rolled limit-thickness strip steel is used as an example in a cold-rolling mill in a cold-rolling factory to produce thin-gauge cold-rolled strip products of 0.25 mm, and the strip-rolled thickness is 0.5mm, the strip width is 1250mm, and the tensile strength is 650Mpa. The specific rolling method is as follows:

[0039] (1) Start the automatic head rolling mode

[0040] When the rolling mill meets the following 3 conditions, the automatic strip rolling mode starts:

[0041] Condition 1: The thickness at the exit of the rolling mill is set to 0.25mm;

[0042] Condition 2: The strip weld is less than 12m away from the first frame;

[0043] Condition 3: Strip exit speed v=1m / s.

[0044] (2) Calculate the thickness ratio coefficient

[0045]

[0046] Substitute the value of:

[0047]

[0048] In formula (1), T G is the target thickness of strip rolling; T N Set the thickness for the outlet; A is the t...

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Abstract

The invention discloses a strip head rolling method for cold continuous rolling of a strip steel of a limited thickness, and aims to improve the quality of finished products of the strip steel of the limited thickness. The method comprises the following steps of starting an automatic strip head rolling mode; calculating a thickness ratio coefficient; performing filter processing in thickness measurement; calculating a bracket speed required by the rolled thickness; calculating a slope smoothing factor; calculating the transmitting coefficient of a strip head additional bracket; calculating a bracket strip head rolling speed; and transmitting the automatically calculated parameters to a control system, and starting or closing the automatic strip head rolling mode through utilizing a conventional welding seam tracking system. According to the strip head rolling method disclosed by the invention, the problem that a rolling mill penetrates through the strip steels when the rolling mill rolls ultra-thin strip steels is solved, so that the frequency of strip breaking of heads and tails of the strip steels is reduced, and the problem that a continuous annealing welder is difficult to weld after ultra-thick strip steels are rolled is solved.

Description

technical field [0001] The invention relates to a rolling method for cold continuous rolling of limit thickness strip steel, in particular to a strip head rolling method for cold continuous rolling limit thickness strip steel. Background technique [0002] The incoming materials of the cold tandem rolling mill are mainly hot-rolled thin plates. As the final product, cold-rolled steel strips have been widely used in industries such as home appliances, automobiles, and construction. Cold-rolled strip steel is a rolled product directly faced by general users, and has high requirements for the thickness, specification and shape of cold-rolled strip steel. The original design of the existing five-stand full-six-high tandem cold rolling mill is between 0.3-2.0 mm in thickness and 800-1300 mm in width at the outlet of the rolling mill. When the incoming strip is within a certain specification, the model calculation and process control of the rolling mill are very stable, and the h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/72
CPCB21B37/72B21B2261/04
Inventor 刘洪宇刘俊清
Owner HIGH END EQUIP & RAIL TRANSIT TECH R & D CENT OF HAIAN TAIYUAN UNIV OF SCI
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