The control method for starting the cold tandem mill regardless of the small coils

A technology of cold tandem rolling unit and control method, which is applied in the direction of rolling mill control device, metal rolling, roll speed control, etc. It can solve the problems of reducing the utilization factor of rolling mill speed, poor export steel coil ladle, and affecting the production capacity of the unit, and achieves Reduce cold rolling waste, maintain stable coil shape, and improve factory logistics

Active Publication Date: 2016-09-14
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(2) The strip length tracking calculation of the next process unit is based on the same strip thickness value, so the supply of materials from the rolling mill to the next process unit is not allowed to have uneven strip thickness
[0005] However, the main problems of this process are: it is prone to accidents of bad export steel coils caused by coil splitting, and the low-speed crawling reduces the speed utilization coefficient of the rolling mill, which affects the production capacity of the unit
At present, there is no patent document that discovers and solves this technical problem

Method used

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  • The control method for starting the cold tandem mill regardless of the small coils
  • The control method for starting the cold tandem mill regardless of the small coils
  • The control method for starting the cold tandem mill regardless of the small coils

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Embodiment 1

[0032] like figure 1 As shown, the cold tandem rolling mill in this embodiment starts the control method regardless of small coils, including the following steps:

[0033] In the first step, the cold tandem rolling unit starts and starts rolling strip steel, and the coiler starts to coil the export strip; the coiler is located at the exit of the cold tandem rolling unit; go to the second step;

[0034] The second step is to continuously monitor the actual thickness of the exit strip by using a thickness gauge located at the exit of the cold tandem rolling mill; when the actual thickness is within the preset thickness range, go to the third step;

[0035] The third step is to calculate the coil diameter of the coil on the coiler at the current moment according to the current exit strip line speed V and the coiler motor speed N, and use this coil diameter as the "virtual sleeve" coil diameter D 0 ;Roll diameter of "virtual sleeve" D. 0 The unit of N is mm, the unit of N is r...

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Abstract

The invention relates to a control method for starting a cold tandem rolling unit regardless of small coils, comprising: coiling strip steel by an exit coiler of the cold tandem rolling unit; monitoring the actual thickness of the strip steel, and calculating the coil diameter of a "virtual sleeve" when the standard is reached; The unit in the next process calculates the length of the steel coil of the uncoiler in real time in combination with the coil diameter of the "virtual sleeve", and performs the tail throwing operation when it reaches the standard. The control method of the present invention does not need to increase any equipment investment, so that the rolling mill can be started without coil separation, and at the same time, it will not affect the normal production of the next process unit, which is conducive to improving the production efficiency of cold rolling, reducing the production cost per ton of steel and reducing the number of scrapped cold rolling. .

Description

technical field [0001] The invention relates to a control method for a cold tandem rolling mill, in particular to a control method for starting a cold tandem rolling mill without dividing small coils, and belongs to the technical field of rolling computer control. Background technique [0002] According to the applicant's knowledge, in the actual production process of modern fully continuous high-speed rolling thin strip steel, it is often necessary to restart the cold tandem rolling unit due to process roll change, accidental strip breakage, abnormal shutdown and other reasons. In the initial stage of cold tandem mill start-up, the quality of the strip head could not be qualified due to the fact that the shape and thickness control of the unit did not reach the best effect. [0003] In view of this situation, the small coil cutting process is usually started at the exit of the cold tandem rolling mill: the rolling mill starts to build the tension, crawls at a low speed, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/20B21B37/46
CPCB21B37/20B21B37/46
Inventor 谢邦立严加根黎玄陈宗仁刘云峰王海军
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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