CN103230947A - Method for judging whether rolling guide position of high-speed wire production line is damaged or not - Google Patents
Method for judging whether rolling guide position of high-speed wire production line is damaged or not Download PDFInfo
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- CN103230947A CN103230947A CN2013101525854A CN201310152585A CN103230947A CN 103230947 A CN103230947 A CN 103230947A CN 2013101525854 A CN2013101525854 A CN 2013101525854A CN 201310152585 A CN201310152585 A CN 201310152585A CN 103230947 A CN103230947 A CN 103230947A
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Abstract
The invention discloses a method for judging whether a rolling guide position of a high-speed wire production line is damaged or not. The method is adopted to judge whether the guide position is about to be damaged or not according to change of load current of a rolling mill of a machine frame where the guide position is located and change of load current of rolling mills of adjacent machine frames. The method can be used for guiding steel rolling production and avoiding a stuck steel accident and a quality accident caused by the managed rolling guide position.
Description
Technical field
The present invention relates to a kind of steel rolling technology, specifically, relate to and a kind ofly judge that high line production line rolls and lead the bad method of bit loss.
Background technology
High line production line tension force control is mainly undertaken by the master station operating personnel, by observing the variation of motor load electric current, in time finds the tension variation situation, takes necessary means, guarantees tension stability, and some accident symptom of a trends of energy early warning, avoids the generation of accident.
The appearance influence of rolled rhythm not only that steel rolling is rolled and to be caused the guide and guard damaged condition also can destroy this rack material type.The wearing and tearing of guide and guard and to damage be the stable key factor of restriction processing line always, guide and guard damage not only to cause and suppress steel but also be easy to generate the ears or side handles of a utensil, mass defect such as folding, influence lumber recovery.
Summary of the invention
Technical problem solved by the invention provides a kind ofly judges that high line production line rolls and leads the bad method of bit loss that can be used for instructing steel rolling production, the damage of avoiding leading the position because of rolling causes the generation of suppressing steel accident and quality accident.
Technical scheme is as follows:
A kind ofly judge that high line production line rolls and lead the bad method of bit loss, utilize the mill load electric current of guide and guard place frame to change and the mill load electric current of adjacent frame changes to judge whether described guide and guard will damage.
Further: by rolling the rolling and pre-finish rolling tension free rolling of small tension receiving coil in the uniting and adjustment realization, this moment, kink was controlled to be tension free rolling, after stable, the mill load current value of stablizing afer bay with open rolling is reference current value, with machine frame rolling mill real-time current value and side arm mill load current value and the contrast of described reference current value, judging rolls leads the presence of position.
Further: before described guide and guard damage, the mill load electric current of described guide and guard place frame and the mill load electric current of adjacent frame are stably, mill load electric current rising when described guide and guard place frame, and when the mill load electric current of described adjacent frame descends, judge that described guide and guard will damage.
Further: in roll the district and pre-finish rolling district adjusts the milling train rotating speed according to each sortie speed correction, in roll the correction of district after the speed governing be no more than ± 0.25, the correction in pre-finish rolling district is no more than ± 0.8.
Further: when pre-finish rolling zone velocity correction or looper height actual amount departed from normal datum quantity, then thinking rolls led the position and is about to damage; In the middle of roll the zone and damage and to lead a side arm rolling mill speed correction and increase, and the mill load current value diminishes, and rolls to lead position self sortie mill load current value and increase, then thinking rolls leads the position and is about to damage.
Further: normal reference value control is at the state of 0 following negative value; leading this electric current of position when rolling raises; speed correction side arm is just being become by negative; the milling train current value of frame self increases by 1.5 times on the basis of reference current value; the kink actual height of side arm reduces; the kink actual height of frame self raises, and thinks that then the position of leading of frame self is damaged fully.
Further: the milling train current value of frame self raises, when the milling train current value is elevated to greater than described reference current value 1.5 times, and the mill load electric current of described frame side arm drops to less than 1/2 o'clock of described reference current value, indicates that then the position of leading of described frame is damaged fully.
The technology of the present invention effect comprises:
1, the present invention can be used for instructing steel rolling production, and the damage of avoiding leading the position because of rolling causes the generation of suppressing steel accident and quality accident.The present invention searches out a kind of method whether guide and guard will damage of prejudging from the mill load electric current of stand motor and front and back sortie heap are established unprincipled connection, can instruct in advance and take measures, and avoids suppressing the generation of steel accident and quality accident.
2, the present invention can bring huge economic and social benefits.
Since each teams and groups uses, and the direct economic benefit of generation=80 ton/hour * 0.5 hour/day (modified amount wastes time * 15 days * 150 yuan of/ton (processing profit)=90,000 yuan/month.
The annual long-term economic that produces and social benefit=90,000 yuan/month * 12 month/year+useless * 200 days * 1000 yuan (price difference that finished product is useless with inspection)+6 of 0.5 ton of inspection/month * 12 months * 0.8 ten thousand yuan (guide and guard average price)+500,000 (a year saving equipment dimension inspection takes)=3,250,000 yuan.
3, prospect for promotion and application of the present invention is boundless.
The present invention from the mill load electric current observe this angle improve end product quality, grasp the material type whether normal, common accident is made anticipation, reduce the precedent of technology accident, can apply actual production for a long time.
Description of drawings
Fig. 1 rolls among the present invention and each sortie correction value demonstration figure of this moment of the rolling stable back of each sortie, pre-finish rolling zone reference current value correspondence;
Fig. 2 is guide and guard and the preceding mill load electric current variation diagram of attached process components damage among the present invention;
Fig. 3 is pre-finish rolling zone looper height and speed correction demonstration figure.
The specific embodiment
The present invention utilizes the mill load electric current of guide and guard place frame to change and the mill load electric current of adjacent frame changes to judge whether described guide and guard will damage.Specifically, be roll in realizing by manual uniting and adjustment the rolling and pre-finish rolling tension free rolling of small tension receiving coil (kink is controlled to be tension free rolling) stable after, the mill load current value of stablizing afer bay with open rolling is reference current value, by observing the situation of change of this machine frame rolling mill real-time current value and preceding rolling mill current value, and with this machine frame rolling mill real-time current value and preceding rolling mill current value and reference current value contrast, judging rolls leads the presence of position.
In production practices, guide and guard and attached process components go to toward delicate sign is arranged destruction, and we analyze this point and contrast.
As shown in Figure 1, be to roll among the present invention and each sortie correction value demonstration figure of this moment of the rolling stable back of each sortie, pre-finish rolling zone reference current value correspondence.When the mill load current value after stable is reference current value, manually adjust each frame rotating speed when in fact being exactly open rolling just, it is unbalance to remedy " the second flow amount " that cause because of various factors, in roll the district and pre-finish rolling district adjust the milling train rotating speed according to each sortie speed correction, in roll the correction of district after the speed governing and surpass ± 0.25, the correction in pre-finish rolling district surpasses ± 0.8.
Behind manual uniting and adjustment realization stable rolling, determine normal reference value, normal reference value control is at the state of 0 following negative value; The milling train current value of leading a place when rolling raises, speed correction side arm is just being become by negative, the milling train current value of frame self increases by 1.5 times on the basis of reference current value, the kink actual height of side arm reduces, the kink actual height of frame self raises, and thinks that then the position of leading of frame self is damaged fully.When the milling train current value of frame self is elevated to greater than reference current value 1.5 times, and the mill load electric current of frame side arm drops to less than 1/2 o'clock of reference current value, indicates that then the position of leading of described frame is damaged fully.
As shown in Figure 2, be guide and guard and the preceding mill load electric current variation diagram of attached process components damage among the present invention.In roll No. 12 frames guide and guard damage before; the mill load current value of No. 11 frames and No. 12 frames is to be normal reference value stably; when the guide and guard of No. 12 frames are slightly damaged but when also not damaging fully, the mill load map of current can be sent sign, the guide and guard of No. 12 frames of indication are bad.It shows as, mill load electric current rising (accompanying greater than 1.5 of normal reference value approximately) (Fig. 2 middle and upper part curve) of No. 12 frames.When the mill load electric current of No. 11 frames descends (approximately less than normal reference value 3/4), when less than normal reference value 1/2, indicate that then this leads the position and damage (Fig. 2 middle and lower part curve) fully.From the another one angle, before the guide and guard of No. 12 frames destroy, it is big that the deflector roll gap of the guide and guard of No. 12 frames becomes, the state of nipping when causing No. 12 frames to nip rolled piece changes, cause having " drawing steel " relation between No. 12 frames and No. 11 frames, there are " heap steel " relation in No. 12 frames and No. 13 frames.
As shown in Figure 3, be pre-finish rolling zone looper height and speed correction demonstration figure among the present invention.In the production, the inlet rolling guide that No. 14 milling trains, No. 16 frames, No. 18 frames also often appear in pre-finish rolling district damages, it is bad not only bigger to the product quality influence that bit loss is led in this zone rolling, and pre-finish rolling suppresses steel, and the pair roller case destroys very big, by above-mentioned current ratio according to method and looper height change, the size variation of speed correction, " drew " key point of back " heap " for judging in the past, grasping rolls leads the presence of position, in time changes, and guarantees to produce.In addition to the above methods, the post worker conscientiously observes on the machine side and takes a sample, and also is to avoid because leading the bad good approach of suppressing steel that causes of bit loss.
Under the ordinary production situation, in roll after district's speed governing the speed correction value as far as possible control more more good near " 0 ", after the pre-finish rolling speed governing speed correction value then as far as possible control be good near " 0 " state more at absolute value.In roll and adopt to adjust the milling train rotating speed correction of regulating the speed, pre-finish rolling is adopted and is adjusted milling train rotating speed and the looper height set-point correction of regulating the speed.
When the rolling mill speed correction departs from normal reference value, for example: in roll No. 12 frames guide and guard damage, show as No. 11 machine frame rolling mill speed corrections and increase, the mill load electric current diminishes, the mill load electric current of No. 12 frames increases; Pre-finish rolling district then shows as to damage and leads a side arm looper height reduction, the speed correction is tending towards " 0 " on the occasion of variation, leads position self sortie current value and raises, and the speed correction is tending towards " 0 " and changes to negative value, looper height increases, i.e. the state of preceding " drawing " back " heap ".This state is then thought to roll and is led the position and damage or damage.
Claims (7)
1. the high line production line of judgement rolls and leads the bad method of bit loss, it is characterized in that: utilize the mill load electric current variation of guide and guard place frame and the mill load electric current of adjacent frame to change to judge whether described guide and guard will damage.
2. the high line production line of judgement as claimed in claim 1 rolls and leads the bad method of bit loss, it is characterized in that: roll the rolling and pre-finish rolling tension free rolling of small tension receiving coil in realizing by uniting and adjustment, this moment, kink was controlled to be tension free rolling, after stable, the mill load current value of stablizing afer bay with open rolling is reference current value, with machine frame rolling mill real-time current value and side arm mill load current value and the contrast of described reference current value, judging rolls leads the presence of position.
3. the high line production line of judgement as claimed in claim 1 rolls and leads the bad method of bit loss, it is characterized in that: before described guide and guard damage, the mill load electric current of described guide and guard place frame and the mill load electric current of adjacent frame are stably, mill load electric current rising when described guide and guard place frame, and when the mill load electric current of described adjacent frame descends, judge that described guide and guard will damage.
4. the high line production line of judgement as claimed in claim 1 rolls and leads the bad method of bit loss, it is characterized in that: in roll the district and pre-finish rolling district adjust the milling train rotating speed according to each sortie speed correction, in roll the correction of district after the speed governing be no more than ± 0.25, the correction in pre-finish rolling district is no more than ± 0.8.
5. the high line production line of judgement as claimed in claim 2 rolls and leads the bad method of bit loss, it is characterized in that: when pre-finish rolling zone velocity correction or looper height actual amount departed from normal datum quantity, then thinking rolls led the position and is about to damage; In the middle of roll the zone and damage and to lead a side arm rolling mill speed correction and increase, and the mill load current value diminishes, and rolls to lead position self sortie mill load current value and increase, then thinking rolls leads the position and is about to damage.
6. the high line production line of judgement as claimed in claim 5 rolls and leads the bad method of bit loss; it is characterized in that: normal reference value control is at the state of 0 following negative value; leading this electric current of position when rolling raises; speed correction side arm is just being become by negative; the milling train current value of frame self increases by 1.5 times on the basis of reference current value; the kink actual height of side arm reduces, and the kink actual height of frame self raises, and thinks that then the position of leading of frame self is damaged fully.
7. the high line production line of judgement as claimed in claim 5 rolls and leads the bad method of bit loss, it is characterized in that: the milling train current value of frame self raises, when the milling train current value is elevated to greater than described reference current value 1.5 times, and the mill load electric current of described frame side arm drops to less than 1/2 o'clock of described reference current value, indicates that then the position of leading of described frame is damaged fully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310152585.4A CN103230947B (en) | 2013-04-27 | 2013-04-27 | Judge the method that high line production line rolling guide damages |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310152585.4A CN103230947B (en) | 2013-04-27 | 2013-04-27 | Judge the method that high line production line rolling guide damages |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103230947A true CN103230947A (en) | 2013-08-07 |
| CN103230947B CN103230947B (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310152585.4A Withdrawn - After Issue CN103230947B (en) | 2013-04-27 | 2013-04-27 | Judge the method that high line production line rolling guide damages |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114082791A (en) * | 2021-11-22 | 2022-02-25 | 阳春新钢铁有限责任公司 | Control system and method for through pipe wearing and pre-waking of spiral finished product plastic coil |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07195109A (en) * | 1993-12-29 | 1995-08-01 | Nippon Steel Corp | Method for centering rolled stock |
| JP2001105006A (en) * | 1999-09-30 | 2001-04-17 | Sumitomo Metal Ind Ltd | Production of thick steel plate and this apparatus |
| CN102059256A (en) * | 2010-11-26 | 2011-05-18 | 首钢总公司 | Equipment operating and process quality state monitoring system for high-speed rolling mill |
| CN102470410A (en) * | 2009-07-15 | 2012-05-23 | 西门子公司 | Belt tension and loop control unit |
-
2013
- 2013-04-27 CN CN201310152585.4A patent/CN103230947B/en not_active Withdrawn - After Issue
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07195109A (en) * | 1993-12-29 | 1995-08-01 | Nippon Steel Corp | Method for centering rolled stock |
| JP2001105006A (en) * | 1999-09-30 | 2001-04-17 | Sumitomo Metal Ind Ltd | Production of thick steel plate and this apparatus |
| CN102470410A (en) * | 2009-07-15 | 2012-05-23 | 西门子公司 | Belt tension and loop control unit |
| CN102059256A (en) * | 2010-11-26 | 2011-05-18 | 首钢总公司 | Equipment operating and process quality state monitoring system for high-speed rolling mill |
Non-Patent Citations (1)
| Title |
|---|
| 张华新: "轧机电流趋势与棒材轧制控制", 《中国计量协会冶金分会2011年会论文集》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114082791A (en) * | 2021-11-22 | 2022-02-25 | 阳春新钢铁有限责任公司 | Control system and method for through pipe wearing and pre-waking of spiral finished product plastic coil |
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| CN103230947B (en) | 2015-12-02 |
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