CN103464473A - Automatic adjustment method of finishing roll gap level - Google Patents
Automatic adjustment method of finishing roll gap level Download PDFInfo
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- CN103464473A CN103464473A CN2013103720866A CN201310372086A CN103464473A CN 103464473 A CN103464473 A CN 103464473A CN 2013103720866 A CN2013103720866 A CN 2013103720866A CN 201310372086 A CN201310372086 A CN 201310372086A CN 103464473 A CN103464473 A CN 103464473A
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Abstract
The invention discloses an automatic adjustment method of a finishing roll gap level. The method includes firstly calculating strength difference between two sides of a frame according to corresponding relation between detected force by a pressure detection device during pressing and AGC hydraulic cylinder length changing amount; secondly, calculating a pre-adjusted roll gap value and a rolling gap adjusting value; thirdly, calculating a rolling gap error by setting the difference between rolling force and pressing force and combining rolling machine strength before rolling, presetting according to the calculated rolling gap error, and correcting abnormity manually after preset; and fourthly, adjusting the rolling gap automatically during rolling according to rolling force errors and deviation direction of strip steel. According to the automatic level adjustment method, the level of the finishing roll gap can be preset by pressing strength and presetting rolling force errors, the rolling gap level can be adjusted by a computer appropriately through rolling force errors during rolling, and accordingly the problems of strip steel plate shape and thin specification flick can be controlled effectively.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, be specifically related to the horizontal Automatic adjustment method of a kind of finish rolling roll gap.
Background technology
In the Hot Strip Rolling production process, the template quality perplexs all hot continuous rolling production lines always, regulation and control for template mainly relies on operative employee's observation and experience to be adjusted for a long time, and can't intuitively be observed for each frame outlet template mass defect after setting up tension force (finish rolling and finish rolling with batch) at the band steel, so just make template effectively not monitor and feedback means.
The production of hot continuous rolling thin specification is the sign of this production unit level, but the Major Difficulties that thin specification is produced is rolling stability, the outlet template is controlled more difficult and whipping etc., seriously restricted the production of the thin specification of the hot continuous rolling production line limit, improve ultra-thin gauge rolling stability for this reason, it is particularly outstanding that the problems such as the actual template quality in control ultra-thin gauge rolling process and whipping will show, must improve by effective control device the rolling stability of thin specification for this reason, realize the centering rolling in the ultra-thin gauge rolling process, avoid the appearance of whipping phenomenon.
In reality is produced, the operation of rolling of asymmetrical state is absolute, and the operation of rolling of full symmetric is non-existent, and due to many-sided reason, the theoretical research of unsymmetrical rolling phenomenon is made slow progress always.In recent years, along with being growing more intense of industry competition, in each manufacturer to improving the quality of products, reduce production costs and extension device service life etc. aspect pay attention to day by day under, unsymmetrical rolling phenomenon in production has just caused people's extensive concern gradually, the roll gap horizontal adjusting of continuous hot-rolling mill roll line is controlled and is all completed by operating personnel's manual operation for a long time, because of operating personnel's qualification and grasp different with the difference of asymmetric control degree with the plate shape of steel, simultaneously because operating personnel exist hysteresis and speed to wait more slowly factor for the template adjustment, make with the strip shape quality of steel and control and produced larger difference, newly-built product line particularly, perhaps in new product development, in limit ultra-thin gauge rolling process, the level difference of controlling because of operative employee's operating experience has affected steady production and product quality.
Summary of the invention
By Given this, the invention provides the horizontal Automatic adjustment method of a kind of finish rolling roll gap, mainly by pressing rigidity and setting the level that rolling force deviation presets the finish rolling roll gap, adjust the function of roll gap level with computer by the deviation of roll-force in the operation of rolling more in good time, can effectively control band steel plate type and thin specification whipping problem.
To achieve these goals, the present invention is by the following technical solutions:
The horizontal Automatic adjustment method of a kind of finish rolling roll gap adopts following steps:
The first step, by pressing power that the course pressure checkout gear detects and the corresponding relation of AGC hydraulic cylinder length variations amount, the poor rigidity of computer rack both sides;
Second step, calculate presetting gap values between rollers and operation of rolling roll gap adjusted value;
The 3rd step, before rolling, according to the difference of setting roll-force and throw-on pressure and calculate the roll gap deviation in conjunction with mill stiffness: roll gap level revision in advance is worth=sets roll-force/throw-on pressure * milling train both sides poor rigidity, according to the roll gap deviation of calculating, presetted, after presetting for extremely manually revising;
The 4th step, in rolling according to rolling force deviation and carry out the automatic adjustment of roll gap with the sideslip direction of steel: according to the trace analysis to the rolling parameter relation, the variable quantity that draws strip running deviation and milling train both sides rolling force deviation has single corresponding relation, therefore, when carrying out strip steel deviation control, the variable quantity poor according to roll-force by AGC carries out the adjusting of roll gap level, guarantees, with steel, neutralization to be guaranteed to the steady throwing tail with steel.
As preferably, described presetting gap values between rollers is: (roll-force of setting-roll gap calibration power)/roll gap calibration power * milling train subtend rigidity.
As preferably, described operation of rolling roll gap adjusted value is: the poor * mill stiffness of roll-force * empirical coefficient, the empirical system span is: ± 0.5.
Beneficial effect of the present invention is:
1, the present invention is by existing AGC(automatic thickness control system) function, control module is improved, utilize the automatic identification of computer, carrying out the automatic horizontal adjustment according to artificial given program, can realize like this adjustment and the correction automatically in advance, in real time and fast with steel, solve with long-term difficult problems perplexed of hot continuous rolling such as the logical plate template of steel and thin specification whippings to reach.By add artificial computing formula in the one-level program, in by the operation of rolling, pressure divergence is adjusted in good time, and modification of program is simple, and control procedure is easy to the characteristics such as realization; Can effectively by the computer one-level, automatically control the monolateral shape wave of accommodation zone steel, can effectively make up in good time accurately and timely adjusting of manually can't accomplishing, can effectively improve the template quality in kind with steel.
2, the present invention is mainly used in the template quality in the controlled rolling process, and the whipping problem while especially thin specification being produced can play effective control, by computer, automatically regulates and realizes the control of template automatic deviation correction.
3, the present invention can shift to an earlier date, accurately, in good time with the automatic control of steel plate type, can control timely and effectively the monolateral shape wave in the belt steel rolling process, establish good control and practical basis for realizing automatic Steel Rolling.
Occur when 4, the present invention is for ultra-thin gauge rolling that the whipping problem can arrive effectively control, can accurately and timely be rectified a deviation for band steel afterbody by automatic adjusting, avoid the whipping problem to occur.
The accompanying drawing explanation
fig. 1 is schematic flow sheet of the present invention.
The specific embodiment
The horizontal roll gap that the present invention calculates finish rolling by formula is presetted, feed back to carry out by the pressure divergence in the operation of rolling Level tune that one-level is controlled roll gap automatically again, by roll gap preset with the operation of rolling in level automatically regulate, can effectively realize the full frame roll gap of finish rolling level preset with the operation of rolling in level automatically regulate, this function has broken through operative employee's eye-observation and micro-judgment on the traditional sense, the level that theoretical calculating and actual feedback control to regulate roll gap, realized the automatic control of the monolateral shape wave of the full frame of finish rolling.The realization of controlling function by this, can effectively control the logical plate template of band steel, very obvious for thin gauge strip afterbody template control action especially, can effectively control " whipping ".
As shown in Figure 1, the specific embodiment of the invention step is as follows:
The first step, by pressing power that the course pressure checkout gear detects and the corresponding relation of AGC hydraulic cylinder length variations amount, the poor rigidity of computer rack both sides;
Second step, calculate presetting gap values between rollers and operation of rolling roll gap adjusted value; Presetting gap values between rollers is: (roll-force of setting-roll gap calibration power)/roll gap calibration power * milling train subtend rigidity.Operation of rolling roll gap adjusted value is: the poor * mill stiffness of roll-force * empirical coefficient, and the empirical system span is: ± 0.5;
The 3rd step, before rolling, according to the difference of setting roll-force and throw-on pressure and calculate the roll gap deviation in conjunction with mill stiffness: roll gap level revision in advance is worth=sets roll-force/throw-on pressure * milling train both sides poor rigidity, according to the roll gap deviation of calculating, presetted, after presetting for extremely manually revising;
The 4th step, in rolling according to rolling force deviation and carry out the automatic adjustment of roll gap with the sideslip direction of steel: according to the trace analysis to the rolling parameter relation, the variable quantity that draws strip running deviation and milling train both sides rolling force deviation has single corresponding relation, therefore, when carrying out strip steel deviation control, the variable quantity poor according to roll-force by AGC carries out the adjusting of roll gap level, guarantees, with steel, neutralization to be guaranteed to the steady throwing tail with steel.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, other modifications that those of ordinary skills make technical scheme of the present invention or be equal to replacement, only otherwise break away from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of claim scope of the present invention.
Claims (3)
1. the horizontal Automatic adjustment method of finish rolling roll gap, is characterized in that: comprise the steps:
The first step, by pressing power that the course pressure checkout gear detects and the corresponding relation of AGC hydraulic cylinder length variations amount, the poor rigidity of computer rack both sides;
Second step, calculate presetting gap values between rollers and operation of rolling roll gap adjusted value;
The 3rd step, before rolling, according to the difference of setting roll-force and throw-on pressure and calculate the roll gap deviation in conjunction with mill stiffness: roll gap level revision in advance is worth=sets roll-force/throw-on pressure * milling train both sides poor rigidity, according to the roll gap deviation of calculating, presetted, after presetting for extremely manually revising;
The 4th step, in rolling according to rolling force deviation and carry out the automatic adjustment of roll gap with the sideslip direction of steel: according to the trace analysis to the rolling parameter relation, the variable quantity that draws strip running deviation and milling train both sides rolling force deviation has single corresponding relation, therefore, when carrying out strip steel deviation control, the variable quantity poor according to roll-force by AGC carries out the adjusting of roll gap level, guarantees, with steel, neutralization to be guaranteed to the steady throwing tail with steel.
2. the horizontal Automatic adjustment method of a kind of finish rolling roll gap according to claim 1, it is characterized in that: described presetting gap values between rollers is: (roll-force of setting-roll gap calibration power)/roll gap calibration power * milling train subtend rigidity.
3. the horizontal Automatic adjustment method of a kind of finish rolling roll gap according to claim 1 and 2, it is characterized in that: described operation of rolling roll gap adjusted value is: the poor * mill stiffness of roll-force * empirical coefficient, the empirical system span is: ± 0.5.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665451A (en) * | 2016-03-15 | 2016-06-15 | 山东钢铁股份有限公司 | Calibration method for finishing mill |
| CN105921525A (en) * | 2016-05-05 | 2016-09-07 | 广西柳州银海铝业股份有限公司 | Correction method for tail of strip of continuous rolling unit |
| CN106269904A (en) * | 2015-05-27 | 2017-01-04 | 鞍钢股份有限公司 | A kind of scaling method of mill roll-gap |
| CN110153202A (en) * | 2019-06-21 | 2019-08-23 | 安阳钢铁股份有限公司 | A kind of method that mill roll-gap automatic horizontal is adjusted |
| CN110328245A (en) * | 2019-07-02 | 2019-10-15 | 北京首钢股份有限公司 | A kind of method and device controlling strip whipping |
| CN111215233A (en) * | 2019-11-19 | 2020-06-02 | 成都九泰科技有限公司 | Deviation correction and pressure control method for roll squeezer system |
| CN111530940A (en) * | 2020-05-09 | 2020-08-14 | 河钢股份有限公司承德分公司 | Steel rolling drift automatic adjusting method based on bounce theory |
| CN111872133A (en) * | 2020-08-03 | 2020-11-03 | 华峰铝业有限公司 | Metal composite material bonding rolling method for improving defects of air bubbles and leather material deviation |
| CN111922094A (en) * | 2020-07-09 | 2020-11-13 | 首钢京唐钢铁联合有限责任公司 | Control method for automatically setting horizontal value of head of strip steel and finishing mill system |
| CN112139259A (en) * | 2019-06-28 | 2020-12-29 | 宝山钢铁股份有限公司 | Automatic deviation rectifying control method for finish rolling strip steel |
| CN112337978A (en) * | 2020-09-28 | 2021-02-09 | 中冶南方工程技术有限公司 | Plate shape presetting method and device for plate and strip rolling mill |
| CN112547809A (en) * | 2020-11-20 | 2021-03-26 | 安阳钢铁股份有限公司 | Method for improving setting precision of roll gap of rolling mill |
| CN112756403A (en) * | 2020-12-18 | 2021-05-07 | 攀钢集团攀枝花钢钒有限公司 | Strip steel deviation rectifying system and method |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106269904A (en) * | 2015-05-27 | 2017-01-04 | 鞍钢股份有限公司 | A kind of scaling method of mill roll-gap |
| CN105665451B (en) * | 2016-03-15 | 2017-06-23 | 山东钢铁股份有限公司 | Finishing mill scaling method |
| CN105665451A (en) * | 2016-03-15 | 2016-06-15 | 山东钢铁股份有限公司 | Calibration method for finishing mill |
| CN105921525A (en) * | 2016-05-05 | 2016-09-07 | 广西柳州银海铝业股份有限公司 | Correction method for tail of strip of continuous rolling unit |
| CN110153202A (en) * | 2019-06-21 | 2019-08-23 | 安阳钢铁股份有限公司 | A kind of method that mill roll-gap automatic horizontal is adjusted |
| CN110153202B (en) * | 2019-06-21 | 2020-09-11 | 安阳钢铁股份有限公司 | Automatic horizontal adjustment method for roll gap of rolling mill |
| CN112139259A (en) * | 2019-06-28 | 2020-12-29 | 宝山钢铁股份有限公司 | Automatic deviation rectifying control method for finish rolling strip steel |
| CN110328245A (en) * | 2019-07-02 | 2019-10-15 | 北京首钢股份有限公司 | A kind of method and device controlling strip whipping |
| CN111215233A (en) * | 2019-11-19 | 2020-06-02 | 成都九泰科技有限公司 | Deviation correction and pressure control method for roll squeezer system |
| CN111215233B (en) * | 2019-11-19 | 2022-03-18 | 成都九泰科技有限公司 | Deviation correction and pressure control method for roll squeezer system |
| CN111530940B (en) * | 2020-05-09 | 2021-05-25 | 河钢股份有限公司承德分公司 | Steel rolling drift automatic adjusting method based on bounce theory |
| CN111530940A (en) * | 2020-05-09 | 2020-08-14 | 河钢股份有限公司承德分公司 | Steel rolling drift automatic adjusting method based on bounce theory |
| CN111922094A (en) * | 2020-07-09 | 2020-11-13 | 首钢京唐钢铁联合有限责任公司 | Control method for automatically setting horizontal value of head of strip steel and finishing mill system |
| CN111922094B (en) * | 2020-07-09 | 2022-06-14 | 首钢京唐钢铁联合有限责任公司 | Control method for automatically setting horizontal value of head of strip steel and finishing mill system |
| CN111872133A (en) * | 2020-08-03 | 2020-11-03 | 华峰铝业有限公司 | Metal composite material bonding rolling method for improving defects of air bubbles and leather material deviation |
| CN111872133B (en) * | 2020-08-03 | 2022-03-15 | 华峰铝业有限公司 | Metal composite material bonding rolling method for improving defects of air bubbles and leather material deviation |
| CN112337978A (en) * | 2020-09-28 | 2021-02-09 | 中冶南方工程技术有限公司 | Plate shape presetting method and device for plate and strip rolling mill |
| CN112547809A (en) * | 2020-11-20 | 2021-03-26 | 安阳钢铁股份有限公司 | Method for improving setting precision of roll gap of rolling mill |
| CN112547809B (en) * | 2020-11-20 | 2023-03-10 | 安阳钢铁股份有限公司 | Method for improving setting precision of roll gap of rolling mill |
| CN112756403A (en) * | 2020-12-18 | 2021-05-07 | 攀钢集团攀枝花钢钒有限公司 | Strip steel deviation rectifying system and method |
| CN112756403B (en) * | 2020-12-18 | 2022-08-16 | 攀钢集团攀枝花钢钒有限公司 | Strip steel deviation rectifying system and method |
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Application publication date: 20131225 |