CN104107837A - Method for accurately controlling band-steel ductility when welding joints pass leveling machine - Google Patents
Method for accurately controlling band-steel ductility when welding joints pass leveling machine Download PDFInfo
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- CN104107837A CN104107837A CN201310139128.1A CN201310139128A CN104107837A CN 104107837 A CN104107837 A CN 104107837A CN 201310139128 A CN201310139128 A CN 201310139128A CN 104107837 A CN104107837 A CN 104107837A
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- percentage elongation
- planisher
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- weld seam
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Abstract
The invention discloses a method for accurately controlling band-steel ductility when welding joints pass a leveling machine. The method includes steps that firstly, when band steel moves to the welding joints and is close to the leveling machine, the moving speed of the band steel is reduced to 30-70m/min, and the welding joints needs to be more 1m away from the leveling machine after speed reduction; when the band steel moves to the welding joints and passes the leveling machine, rolling force is reduced to 80-150 tons; when the band steel moves to the welding joints and goes through the leveling machine, a current practical ductility value and a ductility target value are compared, if the former is larger than the latter, rolling force is 300-800 tons; if the former is smaller than the latter, rolling force is 90-150 tons, and if the former is equal to the latter, all steps are finished; the band steel keeps moving, whether the current practical ductility value is approximate to the ductility target value or not is judged, if yes, the next step is performed, and if not, rolling force rises at the speed of 500-1500 tons; the steps are finished.
Description
Technical field
The present invention relates to the production control method in a kind of metallurgical process, relate in particular to a kind of band steel elongation controlling means.
Background technology
In cold-rolling continuous annealing unit, the percentage elongation of planisher is to connect the key process parameter that moves back general cold drawing, and it has determined the final performance of belt steel product.As shown in Figure 1, Fig. 1 shows in prior art and connects and move back the simple and easy diagram that planisher is arranged, with steel 13 respectively at the idler roller 11 that is positioned at planisher 10 front and back, 12 places are subject to tension force, and be subject to skin pass rolling power at planisher 10 places, therefore the control of planisher percentage elongation is mainly by skin pass rolling power, and smooth front and back tension force determines jointly, and wherein the roll-force of planisher is to control the key factor of planisher percentage elongation precision.
In prior art, the flow process of percentage elongation method is as shown in Figure 2 when controlling weld seam band steel and cross planisher.As can be seen from Figure 2, in the time that weld seam passes through planisher, elongation control is cut off, (common to cross the skin pass rolling power of weld seam be below 100 tons now the sharply variation of a roll-force, normal operation roll-force is up to 1000 tons of left and right, and weld seam is spent the time of planisher and is only had short about 2 seconds), (Fig. 3 is roll-force control curve map when weld seam is by planisher in prior art as shown in Figure 3, wherein A curve represents setting curve, B represents actual curve), this roll-force switching sharply can cause with steel in the upper percentage elongation fluctuation of a very long segment length (nearly 20 meters), 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 has caused thus very large waste.
Summary of the invention
While the object of the present invention is to provide a kind of weld seam to cross planisher, accurately control the method with steel percentage elongation, the method is crossed before planisher the adjustment of crossing the roll-force after planisher with steel gait of march and weld seam by butt welded seam, the percentage elongation value with steel is controlled on fast accurate ground, has improved the lumber recovery with steel.
In order to reach foregoing invention object, when the invention provides a kind of weld seam and crossing planisher, accurately control the method with steel percentage elongation, it comprises the following steps:
(1) start;
(2) in the time that band steel marches to weld seam and approaches planisher, band steel gait of march is down to 30-70m/min, and more than the rear weld seam that slowed down needs anomaly complete machine 1m;
(3) in the time that band steel marches to weld seam and started planisher, by roll-force fast-descending to 80-150 ton;
(4) when band steel marches to weld seam by after planisher, 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, controlled rolling power is 300-800 ton; If current actual measurement percentage elongation value is less than percentage elongation desired value, controlled rolling power is 90-150 ton; If current actual measurement percentage elongation value equals percentage elongation desired value, skip to step (6);
(5) band steel is further advanced, and judges whether current actual measurement percentage elongation value approaches percentage elongation desired value: if yes, carry out next step; If NO be, 500-1500 ton/s by the control of the roll-force rate of climb, until current actual measurement percentage elongation value approaches percentage elongation desired value;
(6) finish.
Further, in above-mentioned steps (3), in the time that the distance of weld pitch planisher is less than 1m, 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 passes through after planisher X1, the size of more current actual measurement percentage elongation value and percentage elongation desired value, and X1 is 0.1-0.9m.
Further, in above-mentioned steps (5), weld seam, by after planisher X2, judges whether current actual measurement percentage elongation value approaches percentage elongation desired value, and X2 is 0.2-1m, and X2 > X1.
Further, between above-mentioned steps (5) and (6), also there is step (5a): if weld seam is by after planisher X3, band steel gait of march is accelerated to 100-700m/min, X2 < X3 < 15m.In order to provide time enough for the adjustment of percentage elongation above by accelerating with steel gait of march.
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%, think that current actual measurement percentage elongation value approaches percentage elongation desired value.
Technical scheme of the present invention is crossed before planisher with steel gait of march and weld seam and is crossed roll-force size after planisher and the adjustment of roll-force pace of change by butt welded seam, band steel percentage elongation when control weld seam is crossed planisher, and it has the following advantages:
(1) the band steel percentage elongation while controlling weld seam fast, accurately and efficiently and cross planisher;
(2) reduce the length of defective percentage elongation band steel, improve the utilization rate of becoming a useful person with steel;
(3) implementation and operation is simple.
Brief description of the drawings
Fig. 1 connects in prior art to move back the structural representation that planisher is arranged.
Fig. 2 connects the elongation controlling means flow chart that moves back planisher weld seam and cross planisher in prior art.
Fig. 3 is the curve of cyclical fluctuations of roll-force while adopting existing weld seam to cross planisher elongation controlling means.
Fig. 4 is the curve of cyclical fluctuations with steel percentage elongation while adopting existing weld seam to cross planisher elongation controlling means.
Fig. 5 is that weld seam of the present invention is accurately controlled method with the steel percentage elongation flow chart under a kind of embodiment while crossing planisher.
Fig. 6 is the roll-force curve of cyclical fluctuations while adopting weld seam of the present invention to cross planisher elongation controlling means.
Fig. 7 is the band steel percentage elongation curve of cyclical fluctuations while adopting weld seam of the present invention to cross planisher elongation controlling means.
Detailed description of the invention
Accurately control and be described further with the method for steel percentage elongation when weld seam of the present invention being crossed to planisher according to detailed description of the invention and Figure of description below, 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, the band steel percentage elongation while crossing planisher according to following step butt welded seam is controlled:
(1) start;
(2) in the time that band steel marches to weld seam and approaches 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) in the time that the distance of weld pitch planisher is less than 1m, with the speed of 400 tons/s by roll-force fast-descending 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, be 400-600 ton by roll-force control; If current actual measurement percentage elongation value is less than percentage elongation desired value, be 90-150 ton by roll-force control; If current actual measurement percentage elongation value equals percentage elongation desired value, 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, carry out next step; If not, be 600 tons/s by the control of the roll-force rate of climb;
(6) finish.
Fig. 6 has shown the roll-force curve of cyclical fluctuations while adopting said method.Wherein, A is rolling force setup curve, and B is roll-force actual curve.
Fig. 7 has shown the band steel percentage elongation curve of cyclical fluctuations while 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, its fluctuation length with steel percentage elongation will be far smaller than the band steel percentage elongation fluctuation length that Fig. 4 shows.Band steel percentage elongation fluctuation length in the technical program probably only has 5m left and right.Therefore, adopt the control method of the present embodiment both precisely to control percentage elongation value when weld seam is crossed planisher, improved again the utilization rate of belt steel material, save production input cost from material and time.
Those of ordinary skill in the art will be appreciated that, above embodiment is only for the present invention is described, and be not used as limitation of the invention, as long as in essential scope of the present invention, the variation to the above embodiment or modification all will drop within the scope of claims of the present invention.
Claims (7)
1. when weld seam is crossed planisher, accurately control the method with steel percentage elongation, it is characterized in that, comprise the following steps:
(1) start;
(2) in the time that band steel marches to weld seam and approaches planisher, band steel gait of march is down to 30-70m/min, and more than the rear weld seam that slowed down needs anomaly complete machine 1m;
(3) in the time that band steel marches to weld seam and started planisher, by roll-force fast-descending to 80-150 ton;
(4) when band steel marches to weld seam by after planisher, 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, controlled rolling power is 300-800 ton; If current actual measurement percentage elongation value is less than percentage elongation desired value, controlled rolling power is 90-150 ton; If current actual measurement percentage elongation value equals percentage elongation desired value, skip to step (6);
(5) band steel is further advanced, and judges whether current actual measurement percentage elongation value approaches percentage elongation desired value: if yes, carry out next step; If NO be, 500-1500 ton/s by the control of the roll-force rate of climb, until current actual measurement percentage elongation value approaches percentage elongation desired value;
(6) finish.
2. the method for claim 1, is characterized in that: in step (3), in the time that the distance of weld pitch planisher is less than 1m, think that weld seam started planisher.
3. the method for claim 1, is characterized in that: in step (3), the speed that roll-force declines is 200-500 ton/s.
4. the method for claim 1, is characterized in that: in step (4), weld seam passes through after planisher X1, the size of more current actual measurement percentage elongation value and percentage elongation desired value, and X1 is 0.1-0.9m.
5. method as claimed in claim 4, is characterized in that, in step (5), weld seam, by after planisher X2, judges whether current actual measurement percentage elongation value approaches percentage elongation desired value, and X2 is 0.2-1m, and X2 > X1.
6. method as claimed in claim 5, it is characterized in that, between step (5) and (6), also there is step (5a): if weld seam is by after planisher X3, 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%, thinks that current actual measurement percentage elongation value approaches percentage elongation desired value.
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| CN201310139128.1A CN104107837B (en) | 2013-04-19 | 2013-04-19 | The method of accurate control cincture steel percentage elongation when weld seam crosses planisher |
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| CN201310139128.1A CN104107837B (en) | 2013-04-19 | 2013-04-19 | The method of accurate control cincture steel percentage elongation when weld seam crosses planisher |
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| CN104107837B CN104107837B (en) | 2016-02-24 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270002A (en) * | 2016-08-29 | 2017-01-04 | 首钢京唐钢铁联合有限责任公司 | A kind of method and device of rolled band steel weld seam |
| CN106825069A (en) * | 2017-03-22 | 2017-06-13 | 宁波宝新不锈钢有限公司 | A kind of cold-strip steel high accuracy plate 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 |
| CN107716558A (en) * | 2017-10-13 | 2018-02-23 | 山西太钢不锈钢股份有限公司 | It is a kind of to control the stable operating method by five frame connection rolling machine of stainless steel weld joint |
| CN110064652A (en) * | 2019-04-18 | 2019-07-30 | 首钢京唐钢铁联合有限责任公司 | A kind of method and apparatus becoming specification rolling applied to the planisher limit |
| CN110142314A (en) * | 2019-06-05 | 2019-08-20 | 北京首钢冷轧薄板有限公司 | A kind of galvanized wire weld seam crosses the control method and device of polishing machine tension fluctuation |
| CN110227724A (en) * | 2019-06-09 | 2019-09-13 | 宝钢湛江钢铁有限公司 | A kind of weld seam crosses the parameter control method of six roller Cold-Rolled Strip Temper Mill of continuous annealing |
| CN110227723A (en) * | 2019-06-09 | 2019-09-13 | 宝钢湛江钢铁有限公司 | A kind of parameter control method of six roller Cold-Rolled Strip Temper Mill initial segment of continuous annealing |
| CN110653267A (en) * | 2018-06-29 | 2020-01-07 | 宝山钢铁股份有限公司 | Control method for micro-opening welding seam of hot galvanizing unit leveling equipment |
| CN113102517A (en) * | 2021-05-14 | 2021-07-13 | 宝钢湛江钢铁有限公司 | Hot galvanizing four-roller temper mill elongation rate control method |
| CN113560372A (en) * | 2021-06-28 | 2021-10-29 | 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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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270002A (en) * | 2016-08-29 | 2017-01-04 | 首钢京唐钢铁联合有限责任公司 | A kind of method and device of rolled band steel weld seam |
| CN106270002B (en) * | 2016-08-29 | 2018-09-18 | 首钢京唐钢铁联合有限责任公司 | A kind of method and device of rolled band steel weld seam |
| CN106825069A (en) * | 2017-03-22 | 2017-06-13 | 宁波宝新不锈钢有限公司 | A kind of cold-strip steel high accuracy plate shape surface roughness on-line intelligence control method |
| 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 |
| CN107716558A (en) * | 2017-10-13 | 2018-02-23 | 山西太钢不锈钢股份有限公司 | It is a kind of to control the stable operating method by five frame connection rolling machine of 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 |
| CN110653267A (en) * | 2018-06-29 | 2020-01-07 | 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 |
| CN110064652A (en) * | 2019-04-18 | 2019-07-30 | 首钢京唐钢铁联合有限责任公司 | A kind of method and apparatus becoming specification rolling applied to the planisher limit |
| CN110142314A (en) * | 2019-06-05 | 2019-08-20 | 北京首钢冷轧薄板有限公司 | A kind of galvanized wire weld seam crosses the control method and device of polishing machine tension fluctuation |
| CN110227724A (en) * | 2019-06-09 | 2019-09-13 | 宝钢湛江钢铁有限公司 | A kind of weld seam crosses the parameter control method of six roller Cold-Rolled Strip Temper Mill of continuous annealing |
| CN110227723A (en) * | 2019-06-09 | 2019-09-13 | 宝钢湛江钢铁有限公司 | A kind of parameter control method of six roller Cold-Rolled Strip Temper Mill initial segment of continuous annealing |
| CN113102517A (en) * | 2021-05-14 | 2021-07-13 | 宝钢湛江钢铁有限公司 | Hot galvanizing four-roller temper mill elongation rate control method |
| 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 |
| CN113560372A (en) * | 2021-06-28 | 2021-10-29 | 鞍钢股份有限公司 | Method for stably controlling plate shape of welding seam area by continuous annealing unit |
| 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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