CN103252357A - Broadening rolling method with dynamic roll gap control - Google Patents
Broadening rolling method with dynamic roll gap control Download PDFInfo
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- CN103252357A CN103252357A CN201310193008XA CN201310193008A CN103252357A CN 103252357 A CN103252357 A CN 103252357A CN 201310193008X A CN201310193008X A CN 201310193008XA CN 201310193008 A CN201310193008 A CN 201310193008A CN 103252357 A CN103252357 A CN 103252357A
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Abstract
The invention discloses a broadening rolling method with dynamic roll gap control. The broadening rolling method comprises the following steps of improving hydraulic pressure response speed, when a steel plate is in a last pass of broadening passes, lifting up a roll gap 1-2mm in the process of biting steel, pressing the roll gap 3-4mm in the process of steel plate rolling after normal biting steel, and pressing the roll gap when 400mm length of the steel plate is achieved through normal rolling. When the steel plate is close to the tail, the roll gap is lifted up 3-4mm to obtain a steel plate which is U-shaped. By the adoption of the broadening rolling method with the dynamic roll gap control, circular arcs of the head and the tail of the steel plate can be reduced, non-planed size is reduced, and yield is improved.
Description
Technical field
The present invention relates to a kind of steel plate rolling method, specifically a kind of broadening milling method that utilizes dynamic roll gap control.
Background technology
Along with the aggravation of market competition, how to improve the lumber recovery of steel plate, it is important all the more to improve enterprise competitiveness.The most frequently used broadening rolling of present national cut deal has two kinds:
1, vertically broadening is rolling: when slab length less than finished product steel plate burr width, and need be with the slab length direction during as the finished product steel plate width, slab after de-scaling and the roll forming is rotation direction no longer, but continue rollingly, turn over 90 degree when slab length is rolled finished product steel plate burr width dimensions again and enter the elongation rolling sequence.
2, laterally broadening is rolling: when width of plate slab less than finished product steel plate burr width, and need be with width of plate slab during as the finished product steel plate width, after de-scaling and roll forming slab being turned over 90 degree makes, after width of plate slab is stretched to finished product steel plate burr width dimensions, goes back to 90 degree again and enter the elongation rolling sequence.
Above broadening rolling can help to improve the anisotropy of steel plate, but existing problems: 1, the material type is had requirement, bulge is shone in the meeting of broadening serious offense; The rectangle degree of steel plate is poor; 2, can't solve the problem of circular arc end to end, lumber recovery can not get improving; 3, under material type complicated situation, easily produce the situation that broadening is excessive or width is not enough, it is unplanned to improve size.
Summary of the invention
In order to overcome the problem that prior art exists, the purpose of this invention is to provide a kind of broadening milling method that utilizes dynamic roll gap control, this method can reduce steel plate circular arc end to end by roll gap control, and it is unplanned to reduce size, improves lumber recovery.
The objective of the invention is to be achieved through the following technical solutions:
A kind of broadening milling method that utilizes dynamic roll gap control is characterized in that this method may further comprise the steps:
1) improve hydraulic response speed, steel plate was at last one o'clock of the broadening passage, and roll gap is lifted 1-2mm when stinging steel;
When 2) normally stinging behind the steel steel plate rolling, roll gap presses down 3-4mm; Steel plate can be when normally being rolled down to 400mm length, and roll gap presses down.
3) at steel plate during near afterbody, roll gap is lifted 3-4mm on again, obtains similar " recessed " shaped steel plate.At steel plate during apart from afterbody 400mm, roll gap is lifted on again.
The present invention is that roll gap is lifted 1-2mm by improving the hydraulic pressure corresponding speed at last one o'clock of the broadening passage stinging steel, and roll gap presses down 3-4mm during rolling 400mm, and near afterbody the time, roll gap is lifted 3-4mm on again.Allow steel plate become " recessed " type.After turning around, thick partially head has partly become width before turning around, and utilizes law of minimum resistance, and the part that width is thick partially can be extended toward cephlad-caudal, to play the compensation head, reduces the effect of circular arc.
The present invention adopts planar rectangular control method, utilizes the variation of the drafts of last passage of broadening, controls the shape behind last together rolling of broadening, by constancy of volume principle and least resistance principle, can effectively reduce the circular arc end to end of steel plate.Circular arc is less end to end for the steel plate that the present invention produces, the yield of steel plate height.
The specific embodiment
A kind of broadening milling method that utilizes the control of dynamic roll gap adopts planar rectangular control method, utilizes the variation of the drafts of last passage of broadening, controls the shape behind last together rolling of broadening, and this method may further comprise the steps:
Improve hydraulic response speed, steel plate was at last one o'clock of the broadening passage, and roll gap is lifted 1-2mm when stinging steel;
After stinging steel, when steel plate normally was rolled down to 400mm length, roll gap pressed down 3-4mm;
At steel plate during apart from afterbody 400mm, roll gap is lifted 3-4mm on again, obtains similar " recessed " shaped steel plate.
Turn around can the centre is many when rolling the part supply end to end, can effectively reduce the circular arc end to end of steel plate.Circular arc is less end to end for the steel plate that the present invention produces, the yield of steel plate height.It is unplanned 0.1% to reduce size, by 1,650,000 tons of calculations at the beginning of the year, can fall this more than 660,000.
Claims (3)
1. broadening milling method that utilizes the control of dynamic roll gap is characterized in that this method may further comprise the steps:
Improve hydraulic response speed, steel plate was at last one o'clock of the broadening passage, and roll gap is lifted 1-2mm when stinging steel;
When normally stinging behind the steel steel plate rolling, roll gap presses down 3-4mm;
At steel plate during near afterbody, roll gap is lifted 3-4mm on again, obtains similar " recessed " shaped steel plate.
2. the broadening milling method of the dynamic roll gap of utilization according to claim 1 control is characterized in that: step 2) in, to sting when steel plate rolling is to 400mm length behind the steel, roll gap presses down.
3. the broadening milling method of the dynamic roll gap of utilization according to claim 1 control is characterized in that: in the step 3), at steel plate during apart from afterbody 400mm, roll gap is lifted on again, allow the slab shape keep before and after symmetry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310193008XA CN103252357A (en) | 2013-05-23 | 2013-05-23 | Broadening rolling method with dynamic roll gap control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310193008XA CN103252357A (en) | 2013-05-23 | 2013-05-23 | Broadening rolling method with dynamic roll gap control |
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| CN103252357A true CN103252357A (en) | 2013-08-21 |
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| CN201310193008XA Pending CN103252357A (en) | 2013-05-23 | 2013-05-23 | Broadening rolling method with dynamic roll gap control |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694570A (en) * | 2016-11-29 | 2017-05-24 | 东北大学 | Hot continuous rolling finishing area rack after-rolling widthwise elongation calculation method |
| CN108787757A (en) * | 2017-04-28 | 2018-11-13 | 宝山钢铁股份有限公司 | A kind of dynamic control method of the neutral roller gap of heavy plate rolling production |
| CN113945359A (en) * | 2021-10-23 | 2022-01-18 | 西南石油大学 | Dynamic seam width adjusting flat plate crack for proppant conveying experiment |
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| US4038848A (en) * | 1974-05-31 | 1977-08-02 | Hitachi, Ltd. | Method and apparatus for controlling eccentricity of rolls in rolling mill |
| CN101722196A (en) * | 2009-11-10 | 2010-06-09 | 武汉钢铁(集团)公司 | Method for calculating and locating strip steel head of automatic stepping system of hot continuous rolling coiling machine |
| CN102581024A (en) * | 2012-03-09 | 2012-07-18 | 攀钢集团攀枝花钢钒有限公司 | Control method for full-length fluctuation of steel rail height |
| CN102601124A (en) * | 2012-03-09 | 2012-07-25 | 攀钢集团攀枝花钢钒有限公司 | Method for controlling bottom width full-length fluctuation of steel rail |
| CN102601125A (en) * | 2012-03-09 | 2012-07-25 | 攀钢集团攀枝花钢钒有限公司 | Steel rail cross section specification full-length fluctuation control method |
| CN103056171A (en) * | 2012-12-27 | 2013-04-24 | 鞍钢集团自动化公司 | Quadratic curve control method for short stroke of rough rolling vertical roll |
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2013
- 2013-05-23 CN CN201310193008XA patent/CN103252357A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4038848A (en) * | 1974-05-31 | 1977-08-02 | Hitachi, Ltd. | Method and apparatus for controlling eccentricity of rolls in rolling mill |
| CN101722196A (en) * | 2009-11-10 | 2010-06-09 | 武汉钢铁(集团)公司 | Method for calculating and locating strip steel head of automatic stepping system of hot continuous rolling coiling machine |
| CN102581024A (en) * | 2012-03-09 | 2012-07-18 | 攀钢集团攀枝花钢钒有限公司 | Control method for full-length fluctuation of steel rail height |
| CN102601124A (en) * | 2012-03-09 | 2012-07-25 | 攀钢集团攀枝花钢钒有限公司 | Method for controlling bottom width full-length fluctuation of steel rail |
| CN102601125A (en) * | 2012-03-09 | 2012-07-25 | 攀钢集团攀枝花钢钒有限公司 | Steel rail cross section specification full-length fluctuation control method |
| CN103056171A (en) * | 2012-12-27 | 2013-04-24 | 鞍钢集团自动化公司 | Quadratic curve control method for short stroke of rough rolling vertical roll |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694570A (en) * | 2016-11-29 | 2017-05-24 | 东北大学 | Hot continuous rolling finishing area rack after-rolling widthwise elongation calculation method |
| CN106694570B (en) * | 2016-11-29 | 2018-10-23 | 东北大学 | A kind of hot continuous rolling finish rolling district rack rolls rear absolute spread computational methods |
| CN108787757A (en) * | 2017-04-28 | 2018-11-13 | 宝山钢铁股份有限公司 | A kind of dynamic control method of the neutral roller gap of heavy plate rolling production |
| CN113945359A (en) * | 2021-10-23 | 2022-01-18 | 西南石油大学 | Dynamic seam width adjusting flat plate crack for proppant conveying experiment |
| CN113945359B (en) * | 2021-10-23 | 2024-05-10 | 西南石油大学 | Dynamic seam width adjusting flat plate crack applicable to proppant conveying experiment |
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Application publication date: 20130821 |