Steel loop control method for low-temperature wide material finishing mill frame of hot continuous rolling mill

A control method and looper technology, applied in rolling mill control devices, metal rolling, metal rolling, etc., can solve the problems of enterprise economic loss, looper oscillation, scrap steel between stands, etc., to reduce abnormal downtime, ensure Automatic control, solve the effect of stability

Inactive Publication Date: 2016-04-20
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of special steel varieties, when the strip outlet temperature of the finishing mill is lower than or equal to 850°C and the width is greater than or equal to 1350mm (the length of the roll in our mill is 1549mm, and the width of the rolled strip is less than 1400mm), due to the wide strip The mismatch between the plastic properties of the steel and the adjustment of the hydraulic looper leads to oscillations in the 0#-5# looper between the finish rolling stands, and in severe cases, it will lead to direct scrap steel between the stands, which seriously affects the normal production of the rolling line and brings great harm to the enterprise. great economic loss

Method used

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  • Steel loop control method for low-temperature wide material finishing mill frame of hot continuous rolling mill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] When the rolled steel grade is T510 and the width is 1350mm, the first-level computer (PLC controller) checks the width moment coefficients of all loopers through the table model. The first-level computer takes the final rolling temperature of the strip steel at 850°C and the finished strip steel width of 1350mm as the selection symbol of the control technology, and at the same time puts into the control of the corresponding rolling mill looper according to the tracking load signal of each rolling mill. The scanning time of this program is 5ms, and the value of the width torque coefficient is 0# looper: width torque coefficient 0.6; 1# looper: width torque coefficient 0.6; 2# looper: width torque coefficient 0.55; 3# looper: width Moment coefficient 0.45; 4# looper: width moment coefficient 0.4; 5# looper: width moment coefficient 0.4.

Embodiment 2

[0025] When the rolling steel grade is container plate SPAH and the width is 1380mm, the first-level computer (PLC controller) checks the width moment coefficients of all loopers through the table model. The first-level computer takes the final rolling temperature of the strip steel at 830°C and the finished strip steel width of 1380mm as the selection symbol of the control technology, and at the same time puts into the control of the corresponding rolling mill looper according to the tracking load signal of each rolling mill. The scanning time of this program is 5ms, and the value of the width torque coefficient is 0# looper: the width torque coefficient is 0.5; 1# looper: the width torque coefficient is 0.5; 2# looper: the width torque coefficient is 0.5; 3# looper: the width Moment coefficient 0.4; 4# looper: width moment coefficient 0.4; 5# looper: width moment coefficient 0.3.

[0026] If there is no selection flag, it is controlled according to the normal looper control ...

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Abstract

The invention relates to the field of hot continuous rolling low-temperature wide material special steel loop control, in particular to a steel loop control method for a low-temperature wide material finishing mill frame of a hot continuous rolling mill. The steel loop control method for low-temperature wide material finishing mill frame of the hot continuous rolling mill is characterized in that whether low-temperature wide material special band steel is rolled or not is judged; if so, a loop control technology is used until the rolling is completed; otherwise, a normal loop automatic control procedure is used; when the outlet temperature of a finishing mill frame of the band steel is lower than or equal to 850 DEG C, and meanwhile, the width is greater than or equal to 1350mm, the low-temperature wide material special band steel is rolled. The steel loop control method has the advantages that a low-temperature wide material special steel loop control technology is developed; the automatic control of a hydraulic loop during low-temperature wide material band belt rolling is ensured; during the low-temperature wide material band belt rolling, the problems of hydraulic loop oscillation between hot continuous rolling finishing mill frames, and the like are solved.

Description

technical field [0001] The invention relates to the field of looper control of low-temperature wide-material special steel for hot continuous rolling, in particular to a control method for steel looper of a low-temperature wide-material finishing stand of a hot continuous rolling mill. Background technique [0002] Because the finishing stand of the hot continuous rolling mill generally consists of 7 rolling mills, a hydraulic looper is arranged between every adjacent two rolling mills. The finishing mill control is realized by the primary and secondary computers, and the width moment coefficient of each rolling mill and the looper torque adjustment control of each rolling mill are all completed by the primary computer PLC. With the development of special steel varieties, when the strip outlet temperature of the finishing mill is lower than or equal to 850°C and the width is greater than or equal to 1350mm (the length of the roll in our mill is 1549mm, and the width of the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/00
CPCB21B37/00B21B2037/002
Inventor 张世厚姚红霞
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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