CN103056171A - Quadratic curve control method for short stroke of rough rolling vertical roll - Google Patents
Quadratic curve control method for short stroke of rough rolling vertical roll Download PDFInfo
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- CN103056171A CN103056171A CN2012105792370A CN201210579237A CN103056171A CN 103056171 A CN103056171 A CN 103056171A CN 2012105792370 A CN2012105792370 A CN 2012105792370A CN 201210579237 A CN201210579237 A CN 201210579237A CN 103056171 A CN103056171 A CN 103056171A
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Abstract
The invention relates to a quadratic curve control method for the short stroke of a rough rolling vertical roll. The quadratic curve shape is used for controlling the short stroke, when a rolled piece is detected to enter the short stroke at the head of a rolling mill; a programmable logic controller (PLC) enables the roll gap to reach the maximum opening of the stroke for the entering of the rolled piece, performs integral according to the speed of the vertical roll or a horizontal roll, considers effects of factors such as forward slip, tracks the head of the roller piece, calculates the length X of the rolled piece entering the vertical roll, as the process of rolling, calculates the real-time roll gap allowance Y of the vertical roll according to a quadratic curve equation, and adjusts the roll gap opening in real time; and the roll gap declines gradually in the quadratic curve shape as the entering of the rolled piece, and when the length X of the rolled piece entering the vertical roll is equal to the length L of the short stroke at the head, the roll gap allowance Y of the vertical roll is zero. By means of the method, errors generated in a broken line mode can be reduced effectively, changes of shapes of heads and tails of rolled pieces can be controlled accurately, and the control accuracy of the short stoke can be improved.
Description
Technical field
The present invention relates to a kind of control method of Ferrous Metallurgy hot rolling line.
Background technology
In the hot rolling roughing mill rolling process, slab reaches the roughing intermediate blank size objectives value that needs through behind edger roll and horizontal roller rolling.Theoretical according to firm end, the edger roll side pressure is so that form the end of a fish tail or ligulate with steel, this is owing to the section at rolling middle rolled piece produces inhomogeneous deformation, cause inhomogeneous elongation with steel to cause, cause the head-tail width overproof, after rolling through level, the distortion of rolled piece end not only can not eliminated on the contrary and can increase the weight of, and causes rolled piece to broaden or loses wide phenomenon.When rolled piece when the deviation of end surpasses permissible value end to end, just need to cut off the overproof part of width, thereby reduce the recovery rate of metal.
Overproof wide in order to reduce band steel toe tail, increase the rate of becoming a useful person with steel, improve the control accuracy of width, adopted end to end short stroke control mode of roughing mill vertical roll, what large number adopted at present is dual slope short stroke control mode.The edger roll opening degree of head end points is maximum, along with the carrying out of rolled piece, dwindles opening degree, behind the arrival break, continues to dwindle opening degree, until reach static opening degree, afterbody is then opposite.Traditional edger roll end to end broken line short stroke control mode only has several point locations, is difficult to accurately control end to end aperture, and Actual Control Effect of Strong is phase step type, can not accurately control shape of rolling piece.
Summary of the invention
The purpose of this invention is to provide a kind of roughing vertical roll short stroke conic section control method, the method adopts the conic section shape to carry out short stroke control, can effectively reduce the error that the broken line mode produces, more accurately control the variation of head and tail shape, improve the precision of short stroke control.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of roughing vertical roll short stroke conic section control method, comprise the control of edger roll head short stroke and the control of edger roll afterbody short stroke, described edger roll head short stroke control mode is: when detecting rolled piece and enter milling train head short stroke, PLC stitches maximum variable quantity G according to edger roll, make roll gap reach the short stroke maximum opening degree and wait for that rolled piece enters, PLC carries out integration according to the speed of edger roll or plain-barreled roll, consider the advancing slip impact that waits factor, head to rolled piece is followed the tracks of, calculate the length of rolled piece X that enters edger roll, along with rolling carrying out, PLC is according to quadratic curve equation, calculate the real-time roll gap correction of edger roll Y, adjust in real time the roll gap opening degree; Roll gap descending with the conic section shape along with entering gradually of rolled piece reduces, when the length of rolled piece X of the edger roll of nipping equates with head short run length L, edger roll roll gap correction Y=0, the edger roll fixed value of roller slit returns to a reference value, the head short stroke is finished;
Described edger roll afterbody short stroke control mode is: when detecting rolled piece and enter vertical roll of rolling afterbody short stroke, PLC follows the tracks of the afterbody of rolled piece, calculate the length of rolled piece X that enters edger roll afterbody short stroke, along with rolling carrying out, PLC is according to quadratic curve equation, calculate the real-time roll gap correction of edger roll Y, adjust in real time the roll gap opening degree; Roll gap is ascending with walk out the gradually increase of conic section shape along with rolled piece, when the length of rolled piece X of the edger roll of nipping equates with afterbody short run length L, and edger roll roll gap correction Y=0, the afterbody short stroke is finished;
Described quadratic curve equation is
0≤X≤L 0≤D≤G wherein
The correction of Y – edger roll roll gap
X – enters the length of edger roll rolled piece
L – rolled piece short run length
The maximum variable quantity of G – edger roll short stroke roll gap
The curve degree of depth of D – edger roll short stroke.
Compared with prior art, the invention has the beneficial effects as follows:
Adopt the mode of conic section to carry out short stroke control, reduce the error that the broken line mode produces, control more accurately the variation of head and tail shape, improve the precision of edger roll short stroke control, reduce band steel toe tail overproof wide, reduce and shear end to end number of times and shearing displacement, increase band steel recovery rate, reduce cost, improved quality and the qualification rate of product.
Description of drawings
Fig. 1 is conic section control structure figure of the present invention.
The specific embodiment
Be described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
The roll gap control of roughing mill vertical roll, jointly finished by electronic and hydraulic pressure two covering devices, when rolled piece enters the roughing mill approach table, the roughing mill vertical roll roll gap carries out the APC adjustment first time according to the second computer setting value by electric device, after the electric device adjustment was complete, PLC calculated the deviation that electric device produces, PLC adjusts the roll gap deviation that electric device produces as hydraulic means setting value, carried out the second time of edger roll roll gap by hydraulic means and adjust, to reach the purpose of accurate location.PLC is to the setting value of hydraulic system at this moment, and as a reference value of short stroke, when rolled piece was about to arrive milling train, the locking of edger roll electric device prepared to carry out the control of edger roll short stroke, and short stroke control is finished by hydraulic means.Short stroke is divided into head short stroke and afterbody short stroke dual mode, and a kind of is that workpiece front end is controlled, and a kind of is that the rolled piece afterbody is controlled, and also can drop into simultaneously.
Take the head short stroke as example, when HMD before the edger roll (hot metal detector) detects rolled piece and enters, PLC begins to start head short stroke control program, stitch maximum variable quantity G according to edger roll, make roll gap reach the short stroke maximum opening degree and wait for that rolled piece enters, PLC carries out integration according to the speed of edger roll or plain-barreled roll, consider the advancing slip impact that waits factor, head to rolled piece is followed the tracks of, calculate the length of rolled piece X that enters edger roll, along with rolling carrying out, PLC is according to quadratic curve equation, calculate real-time roll gap correction Y, adjust in real time the roll gap opening degree.Roll gap descending with the conic section shape along with entering gradually of rolled piece reduces, when the length of rolled piece X of the edger roll of nipping equates with head short run length L, edger roll roll gap correction Y=0, the edger roll fixed value of roller slit returns to a reference value, the head short stroke is finished.Wherein D is the degree of depth of conic section, and the larger conic section degree of depth of numerical value is larger, and short stroke effect amplitude is larger.Roughing mill outlet is equipped with width gage, and PLC or second computer model can carry out data acquisition for the adjustment of short stroke self study and L, G, D parameter according to width gage.
Owing to adopting the conic section mode, the hydraulic system response is quicker, and roll gap changes more level and smooth, eliminates the step effect of the actual generation of traditional double broken line mode, has reduced the error that the broken line mode produces, and has controlled more accurately the rolled piece variation.
The quadratic curve equation formula is:
0≤X≤L 0≤D≤G wherein
The correction of Y – edger roll roll gap
X – enters the length of edger roll rolled piece
L – rolled piece short run length
The maximum variable quantity of G – edger roll short stroke roll gap
The curve degree of depth of D – edger roll short stroke
Edger roll afterbody short stroke control mode and head short stroke control mode are substantially similar, and X has become the length of rolled piece afterbody, act on opposite with the head short stroke.
Claims (1)
1. roughing vertical roll short stroke conic section control method, it is characterized in that, comprise the control of edger roll head short stroke and the control of edger roll afterbody short stroke, described edger roll head short stroke control mode is: when detecting rolled piece and enter milling train head short stroke, PLC stitches maximum variable quantity G according to edger roll, make roll gap reach the short stroke maximum opening degree and wait for that rolled piece enters, PLC carries out integration according to the speed of edger roll or plain-barreled roll, consider the advancing slip impact that waits factor, head to rolled piece is followed the tracks of, calculate the length of rolled piece X that enters edger roll, along with rolling carrying out, PLC calculates the real-time roll gap correction of edger roll Y according to quadratic curve equation, adjusts in real time the roll gap opening degree; Roll gap descending with the conic section shape along with entering gradually of rolled piece reduces, when the length of rolled piece X of the edger roll of nipping equates with head short run length L, edger roll roll gap correction Y=0, the edger roll fixed value of roller slit returns to a reference value, the head short stroke is finished;
Described edger roll afterbody short stroke control mode is: when detecting rolled piece and enter vertical roll of rolling afterbody short stroke, PLC follows the tracks of the afterbody of rolled piece, calculate the length of rolled piece X that enters edger roll afterbody short stroke, along with rolling carrying out, PLC is according to quadratic curve equation, calculate the real-time roll gap correction of edger roll Y, adjust in real time the roll gap opening degree; Roll gap is ascending with walk out the gradually increase of conic section shape along with rolled piece, when the length of rolled piece X of the edger roll of nipping equates with afterbody short run length L, and edger roll roll gap correction Y=0, the afterbody short stroke is finished;
Described quadratic curve equation is
0≤X≤L 0≤D≤G wherein
The correction of Y – edger roll roll gap
X – enters the length of edger roll rolled piece
L – rolled piece short run length
The maximum variable quantity of G – edger roll short stroke roll gap
The curve degree of depth of D – edger roll short stroke.
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| CN201210579237.0A CN103056171B (en) | 2012-12-27 | 2012-12-27 | Quadratic curve control method for short stroke of rough rolling vertical roll |
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| CN201210579237.0A CN103056171B (en) | 2012-12-27 | 2012-12-27 | Quadratic curve control method for short stroke of rough rolling vertical roll |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252357A (en) * | 2013-05-23 | 2013-08-21 | 南京钢铁股份有限公司 | Broadening rolling method with dynamic roll gap control |
| CN104249084A (en) * | 2014-09-26 | 2014-12-31 | 成都金自天正智能控制有限公司 | Hot-rolling strip steel head and tail width accuracy improving method |
| CN104324949A (en) * | 2014-11-14 | 2015-02-04 | 北京金自天正智能控制股份有限公司 | Acquisition method for vertical roll opening degree of rough rolling vertical roll pass |
| CN104907342A (en) * | 2015-06-19 | 2015-09-16 | 首钢京唐钢铁联合有限责任公司 | Roughing short-stroke control method |
| CN105798253A (en) * | 2016-06-06 | 2016-07-27 | 重庆大学 | Special-shaped blank continuous casting secondary-cooling roll gap adjustment method |
| CN108213089A (en) * | 2016-12-09 | 2018-06-29 | 宝山钢铁股份有限公司 | Continuous hot-rolling mill edger roll roll gap control method |
| CN109513749A (en) * | 2018-11-01 | 2019-03-26 | 北京首钢股份有限公司 | A kind of hot-strip head-tail width control method and device |
| CN113020280A (en) * | 2021-03-01 | 2021-06-25 | 北京科技大学设计研究院有限公司 | On-line precision evaluation method for rough rolling large vertical roll of hot rolled strip steel |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252357A (en) * | 2013-05-23 | 2013-08-21 | 南京钢铁股份有限公司 | Broadening rolling method with dynamic roll gap control |
| CN104249084A (en) * | 2014-09-26 | 2014-12-31 | 成都金自天正智能控制有限公司 | Hot-rolling strip steel head and tail width accuracy improving method |
| CN104249084B (en) * | 2014-09-26 | 2016-06-01 | 成都金自天正智能控制有限公司 | A kind of method improving band steel portion's width accuracy end to end when hot continuous rolling is produced |
| CN104324949B (en) * | 2014-11-14 | 2016-08-17 | 北京金自天正智能控制股份有限公司 | A kind of acquisition methods of roughing vertical roll passage edger roll opening degree |
| CN104324949A (en) * | 2014-11-14 | 2015-02-04 | 北京金自天正智能控制股份有限公司 | Acquisition method for vertical roll opening degree of rough rolling vertical roll pass |
| CN104907342A (en) * | 2015-06-19 | 2015-09-16 | 首钢京唐钢铁联合有限责任公司 | Roughing short-stroke control method |
| CN105798253A (en) * | 2016-06-06 | 2016-07-27 | 重庆大学 | Special-shaped blank continuous casting secondary-cooling roll gap adjustment method |
| CN105798253B (en) * | 2016-06-06 | 2017-08-04 | 重庆大学 | A kind of chilling roller of casting for shaped blank continuous two stitches method of adjustment |
| CN108213089A (en) * | 2016-12-09 | 2018-06-29 | 宝山钢铁股份有限公司 | Continuous hot-rolling mill edger roll roll gap control method |
| CN109513749A (en) * | 2018-11-01 | 2019-03-26 | 北京首钢股份有限公司 | A kind of hot-strip head-tail width control method and device |
| CN109513749B (en) * | 2018-11-01 | 2020-06-02 | 北京首钢股份有限公司 | Method and device for controlling width of head and tail of hot rolled strip steel |
| CN113020280A (en) * | 2021-03-01 | 2021-06-25 | 北京科技大学设计研究院有限公司 | On-line precision evaluation method for rough rolling large vertical roll of hot rolled strip steel |
| CN113020280B (en) * | 2021-03-01 | 2022-11-11 | 北京科技大学设计研究院有限公司 | On-line precision evaluation method for rough rolling large vertical roll of hot rolled strip steel |
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| CN103056171B (en) | 2015-03-25 |
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Owner name: DALIAN HUAYELIAN AUTOMATION CO., LTD. Free format text: FORMER OWNER: ANGANG GROUP AUTOMATIZATION COMPANTY Effective date: 20150618 |
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Effective date of registration: 20150618 Address after: 116023 Liaoning Province, Dalian City High-tech Park Qixianling Rhenish Street No. 9 Patentee after: Dalian Huayelian Automation Co., Ltd. Address before: 114002 No. 292 South Zhonghua Road, Tiedong District, Liaoning, Anshan Patentee before: Automation Company of Angang Group |