CN104107837B - The method of accurate control cincture steel percentage elongation when weld seam crosses planisher - Google Patents
The method of accurate control cincture steel percentage elongation when weld seam crosses planisher Download PDFInfo
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- CN104107837B CN104107837B CN201310139128.1A CN201310139128A CN104107837B CN 104107837 B CN104107837 B CN 104107837B CN 201310139128 A CN201310139128 A CN 201310139128A CN 104107837 B CN104107837 B CN 104107837B
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Abstract
The invention discloses the method for accurate control cincture steel percentage elongation when a kind of weld seam crosses planisher, it comprises the following steps: to start; When being with steel to march to weld seam close to planisher, band steel gait of march is down to 30-70m/min, and the rear weld seam that slowed down needs anomaly more than complete machine 1m; When be with steel march to weld seam started planisher time, roll-force is dropped to 80-150 ton; When band steel march to weld seam by planisher after, the size of more current actual measurement percentage elongation value and percentage elongation desired value: if work as the former be greater than the latter, then roll-force is 300-800 ton; If when the former is less than the latter, then roll-force is 90-150 ton; If current actual measurement percentage elongation value equals percentage elongation desired value, then terminate; Band steel continues to advance, and judges that whether current actual measurement percentage elongation value is close to percentage elongation desired value: if yes, then carry out next step; If NO, then the roll-force rate of climb is controlled for 500-1500 ton/s; Terminate.
Description
Technical field
The present invention relates to the production control method in a kind of metallurgical process, particularly relate to a kind of band steel elongation controlling means.
Background technology
In cold-rolling continuous annealing unit, the percentage elongation of planisher connects the key process parameter moving back general cold drawing, which determines the final performance of belt steel product.As shown in Figure 1, Fig. 1 shows in prior art the simple and easy diagram connecting and move back planisher and arrange, with the idler roller 11 that steel 13 is being positioned at before and after planisher 10 respectively, 12 places are subject to tension force, and skin pass rolling power is subject at planisher 10 place, therefore the control of planisher percentage elongation is primarily of skin pass rolling power, and smooth front and back tension force determines jointly, and wherein the roll-force of planisher is the key factor controlling planisher percentage elongation precision.
For controlling the flow process of percentage elongation method when planisher crossed by weld seam band steel as shown in Figure 2 in prior art.As can be seen from Figure 2, when weld seam is by planisher, elongation control cuts off, (usual to cross the skin pass rolling power of weld seam be less than 100 tons now to there is the sharply change of a roll-force, normal operation roll-force is up to about 1000 tons, and the time that weld seam crosses planisher only has short about 2 seconds), as shown in Figure 3 (Fig. 3 be in prior art weld seam by roll-force controlling curve figure during planisher, wherein A curve represents setting curve, B represents actual curve), this roll-force switching sharply can cause being with steel in a very long segment length (nearly 20 meters) upper percentage elongation fluctuation, as shown in Figure 4, A curve table percentage elongation setting value curve in Fig. 4, B represents percentage elongation actual value curve.The band steel of this section of percentage elongation fluctuation, owing to not reaching technological requirement, therefore must excise, and causes very large waste thus.
Summary of the invention
A kind of method of accurate control cincture steel percentage elongation when the object of the present invention is to provide weld seam to cross planisher, cross the adjustment of the roll-force after planisher with steel gait of march and weld seam before the method crosses planisher by butt welded seam, the percentage elongation value of fast accurate ground control cincture steel, improves the lumber recovery of band steel.
In order to reach foregoing invention object, the invention provides the method for accurate control cincture steel percentage elongation when a kind of weld seam crosses planisher, it comprises the following steps:
(1) start;
(2) when being with steel to march to weld seam close to planisher, band steel gait of march is down to 30-70m/min, and the rear weld seam that slowed down needs anomaly more than complete machine 1m;
(3) when be with steel march to weld seam started planisher time, roll-force is rapidly dropped to 80-150 ton;
(4) when band steel march to weld seam by planisher after, the size of more current actual measurement percentage elongation value and percentage elongation desired value: if current actual measurement percentage elongation value is greater than percentage elongation desired value, then controlled rolling power is 300-800 ton; If current actual measurement percentage elongation value is less than percentage elongation desired value, then controlled rolling power is 90-150 ton; If current actual measurement percentage elongation value equals percentage elongation desired value, then skip to step (6);
(5) be with steel to advance further, judge that whether current actual measurement percentage elongation value is close to percentage elongation desired value: if yes, then carry out next step; If NO, then the roll-force rate of climb is controlled for 500-1500 ton/s, until current actual measurement percentage elongation value is close to percentage elongation desired value;
(6) terminate.
Further, in above-mentioned steps (3), when the distance of weld pitch planisher is less than 1m, then think that weld seam started planisher.
Further, in above-mentioned steps (3), the speed that roll-force declines is 200-500 ton/s.
Further, in above-mentioned steps (4), weld seam is by after planisher X1, and the size of more current actual measurement percentage elongation value and percentage elongation desired value, X1 is 0.1-0.9m.
Further, in above-mentioned steps (5), weld seam is by after planisher X2, and judge that whether current actual measurement percentage elongation value is close to percentage elongation desired value, X2 is 0.2-1m, and X2 > X1.
Further, also there is between above-mentioned steps (5) and (6) step (5a): if weld seam is by after planisher X3, then band steel gait of march is accelerated to 100-700m/min, X2 < X3 < 15m.Band steel gait of march is accelerated be that adjustment in order to for percentage elongation above provides time enough.
Further, in above-mentioned steps (5), if the deviation of current actual measurement percentage elongation value and percentage elongation desired value is less than or equal to 0.3%, then think that current actual measurement percentage elongation value is close to percentage elongation desired value.
Cross the adjustment of the roll-force size after planisher and roll-force pace of change before technical scheme of the present invention crosses planisher by butt welded seam with steel gait of march and weld seam, control weld seam crosses band steel percentage elongation during planisher, and it has the following advantages:
(1) band steel percentage elongation when weld seam crosses planisher fast, is controlled accurately and efficiently;
(2) reduce the length of defective percentage elongation band steel, improve the utilization rate of becoming a useful person of band steel;
(3) implementation and operation is simple.
Accompanying drawing explanation
Fig. 1 connects the structural representation moving back planisher and arrange in prior art.
Fig. 2 connects in prior art to move back the elongation controlling means flow chart that planisher weld seam crosses planisher.
Fig. 3 is the curve of cyclical fluctuations of roll-force when adopting existing weld seam to cross planisher elongation controlling means.
Fig. 4 is with the curve of cyclical fluctuations of steel percentage elongation when being and adopting existing weld seam to cross planisher elongation controlling means.
Fig. 5 is the flow chart of method under a kind of embodiment of weld seam of the present invention accurate control cincture steel percentage elongation when crossing planisher.
Fig. 6 is roll-force curve of cyclical fluctuations when adopting weld seam of the present invention to cross planisher elongation controlling means.
Fig. 7 is band steel percentage elongation curve of cyclical fluctuations when adopting weld seam of the present invention to cross planisher elongation controlling means.
Detailed description of the invention
Below the method for accurate control cincture steel percentage elongation when crossing planisher according to detailed description of the invention and Figure of description to weld seam of the present invention is described further, but detailed description of the invention and related description do not form the improper restriction for technical scheme of the present invention.
As shown in Figure 5, band steel percentage elongation when crossing planisher according to following step butt welded seam controls:
(1) start;
(2) when being with steel to march to weld seam close to planisher, band steel gait of march is down to 60m/min, and the distance of having slowed down between rear weld seam and planisher is 2m;
(3) when the distance of weld pitch planisher is less than 1m, with the speed of 400 tons/s, roll-force is rapidly dropped to 80-150 ton;
(4) when weld seam is by after planisher 0.6m, the size of more current actual measurement percentage elongation value and percentage elongation desired value: if current actual measurement percentage elongation value is greater than percentage elongation desired value, then control roll-force as 400-600 ton; If current actual measurement percentage elongation value is less than percentage elongation desired value, then roll-force is controlled for 90-150 ton; If current actual measurement percentage elongation value equals percentage elongation desired value, then skip to step (6);
(5) when weld seam is by after planisher 0.8m, judge whether the deviation of current actual measurement percentage elongation value and percentage elongation desired value is less than or equal to 0.3%, if so, then carries out next step; If not, then the roll-force rate of climb is controlled to be 600 tons/s;
(6) terminate.
Fig. 6 shows roll-force curve of cyclical fluctuations when adopting said method.Wherein, A is rolling force setup curve, and B is roll-force actual curve.
Fig. 7 shows band steel percentage elongation curve of cyclical fluctuations when adopting said method.Wherein, A is percentage elongation desired value (i.e. setting value), and B is percentage elongation measured value.
As can be seen from Figure 7, the fluctuation length of its band steel percentage elongation will be far smaller than the band steel percentage elongation fluctuation length of Fig. 4 display.Band steel percentage elongation fluctuation length in the technical program probably only has about 5m.Therefore, adopt the control method of the present embodiment both precisely to control percentage elongation value when weld seam crosses planisher, turn improve the utilization rate of belt steel material, from material and time saving Productive statistics cost.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to the present invention is described, and be not used as limitation of the invention, as long as in essential scope of the present invention, all will drop in Claims scope of the present invention the change of the above embodiment or modification.
Claims (7)
1. when weld seam crosses planisher, a method for accurate control cincture steel percentage elongation, is characterized in that, comprise the following steps:
(1) start;
(2) when being with steel to march to weld seam close to planisher, band steel gait of march is down to 30-70m/min, and the rear weld seam that slowed down needs anomaly more than complete machine 1m;
(3) when be with steel march to weld seam started planisher time, roll-force is rapidly dropped to 80-150 ton;
(4) when band steel march to weld seam by planisher after, the size of more current actual measurement percentage elongation value and percentage elongation desired value: if current actual measurement percentage elongation value is greater than percentage elongation desired value, then controlled rolling power is 300-800 ton; If current actual measurement percentage elongation value is less than percentage elongation desired value, then controlled rolling power is 90-150 ton; If current actual measurement percentage elongation value equals percentage elongation desired value, then skip to step (6);
(5) be with steel to advance further, judge that whether current actual measurement percentage elongation value is close to percentage elongation desired value: if yes, then carry out next step; If NO, then the roll-force rate of climb is controlled for 500-1500 ton/s, until current actual measurement percentage elongation value is close to percentage elongation desired value;
(6) terminate.
2. the method for claim 1, is characterized in that: in step (3), when the distance of weld pitch planisher is less than 1m, then thinks that weld seam started planisher.
3. the method for claim 1, is characterized in that: in step (3), and the speed that roll-force declines is 200-500 ton/s.
4. the method for claim 1, is characterized in that: in step (4), and weld seam is by after planisher X1, and the size of more current actual measurement percentage elongation value and percentage elongation desired value, X1 is 0.1-0.9m.
5. method as claimed in claim 4, is characterized in that, in step (5), weld seam is by after planisher X2, and judge that whether current actual measurement percentage elongation value is close to percentage elongation desired value, X2 is 0.2-1m, and X2 > X1.
6. method as claimed in claim 5, it is characterized in that, also there is step (5a) between step (5) and (6): if weld seam is by after planisher X3, then band steel gait of march is accelerated to 100-700m/min, X2 < X3 < 15m.
7. the method for claim 1, is characterized in that, in step (5), if the deviation of current actual measurement percentage elongation value and percentage elongation desired value is less than or equal to 0.3%, then thinks that current actual measurement percentage elongation value is close to percentage elongation desired value.
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| CN106270002B (en) * | 2016-08-29 | 2018-09-18 | 首钢京唐钢铁联合有限责任公司 | Method and device for rolling strip steel weld joint |
| CN106825069B (en) * | 2017-03-22 | 2018-07-17 | 宁波宝新不锈钢有限公司 | A kind of cold-strip steel high precision plates shape surface roughness on-line intelligence control method |
| CN107321789A (en) * | 2017-06-01 | 2017-11-07 | 河钢股份有限公司邯郸分公司 | The control method of yield point elongation before and after a kind of elimination cold-strip steel weld seam |
| CN107716558B (en) * | 2017-10-13 | 2019-08-23 | 山西太钢不锈钢股份有限公司 | A kind of stable operating method by five frame connection rolling machine of control stainless steel weld joint |
| CN110653267B (en) * | 2018-06-29 | 2021-06-15 | 宝山钢铁股份有限公司 | Control method for micro-opening welding seam of hot galvanizing unit leveling equipment |
| CN110064652B (en) * | 2019-04-18 | 2020-11-06 | 首钢京唐钢铁联合有限责任公司 | Method and device applied to limit variable-specification rolling of temper mill |
| CN110142314B (en) * | 2019-06-05 | 2021-09-24 | 北京首钢冷轧薄板有限公司 | Method and device for controlling tension fluctuation of galvanized wire welding line burnishing machine |
| CN110227723B (en) * | 2019-06-09 | 2021-02-26 | 宝钢湛江钢铁有限公司 | Parameter control method for initial section of continuous annealing six-roller cold rolling temper mill |
| CN110227724B (en) * | 2019-06-09 | 2021-04-16 | 宝钢湛江钢铁有限公司 | Parameter control method for six-roller cold rolling temper mill for continuous annealing of welding seam |
| CN113102517B (en) * | 2021-05-14 | 2022-04-08 | 宝钢湛江钢铁有限公司 | Hot galvanizing four-roller temper mill elongation rate control method |
| CN113560372B (en) * | 2021-06-28 | 2023-01-17 | 鞍钢股份有限公司 | Method for stably controlling plate shape of welding seam area by continuous annealing unit |
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| JP2748831B2 (en) * | 1992-09-11 | 1998-05-13 | 日本鋼管株式会社 | Temper rolling method |
| JP3743253B2 (en) * | 2000-03-27 | 2006-02-08 | Ｊｆｅスチール株式会社 | Elongation rate control method of temper rolling mill |
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| CN101332469A (en) * | 2007-06-28 | 2008-12-31 | 上海宝信软件股份有限公司 | Tension leveler control method |
| CN101585058A (en) * | 2008-05-22 | 2009-11-25 | 上海精翔实业有限公司 | Band steel stretch-bending straightening system capable of controlling elongation rate and control method thereof |
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