CN102500658A - Hot straightening method for controlling shape of extra-thick plate - Google Patents
Hot straightening method for controlling shape of extra-thick plate Download PDFInfo
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- CN102500658A CN102500658A CN2011103473499A CN201110347349A CN102500658A CN 102500658 A CN102500658 A CN 102500658A CN 2011103473499 A CN2011103473499 A CN 2011103473499A CN 201110347349 A CN201110347349 A CN 201110347349A CN 102500658 A CN102500658 A CN 102500658A
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Abstract
The invention discloses a hot straightening method for controlling the shape of an extra-thick plate, and belongs to the technical field of hot straightening machines for medium-thick plates. The method comprises the following steps of: at the last time when a steel plate is rolled, sending steel plate production data by a rolling machine to a straightening machine, and performing straightening precomputation by the straightening machine on the extra-thick plate; supplying corresponding precomputation parameters, wherein setting ranges of the parameters are that: a straightening force ranges from 1,000 to 5,000 KN, and a straightening speed ranges from 0.2 to 0.7 m/s; and when the steel plate reaches the 1# grating of the straightening machine, starting an extra-thick plate straightening mode, namely setting corresponding straightening roller slits according to different thicknesses and temperatures of the steel plate, and setting the roller slits according to two temperature ranges and three thickness ranges. The invention has the advantages that: the method is easy to operate, and is safe; the problem that the rolled steel plate with the thickness of over 100 millimeters cannot be straightened is solved; a technical guarantee is supplied to control over the shape of the extra-thick plate; and straightening equipment can be protected.
Description
Technical field
The invention belongs to cut deal thermal straightening machine technical field, a kind of thermal straightening method that realizes the control of special heavy plate plate shape particularly is provided.
Background technology
Before, steel plate rolling finishes the back to straightener transmission steel plate creation data, and straightener is aligned precomputation according to steel plate information., the straightener pyrometer will carry out the straightener Model Calculation again after detecting steel plate.11 roller thermal straightening machines design aligning thickness limit is 100mm, and (100～300mm) steel-plate shapes can only be decided by milled sheet shape, follow-up no control device behind the thickness that oversteps the extreme limit.Along with the adjustment of change of market and product structure, special heavy plate output progressively increases, and steel plate plate strip shape quality problem has become the principal contradiction of restriction product quality.Therefore, if can on existing equipment for straightening and process modeling basis, develop the straightening process of special heavy plate, will replenish and new product development generation material impact the aligning principle so.
Summary of the invention
The object of the present invention is to provide a kind of thermal straightening method that realizes the control of special heavy plate plate shape; Not only simple to operate but also safety; Efficiently solve the problem that to align after thickness rolls greater than the 100mm steel plate,, also can protect equipment for straightening simultaneously for the control of the plate shape of special heavy plate provides technical guarantee.
The present invention is that the final pass milling train at steel plate rolling will send the steel plate creation data to straightener, and straightener carries out the precomputation of special heavy plate aligning.Provide corresponding precomputation parameter then.Each parameter setting range is following:
Straightening force scope: 1000KN-5000KN
Aligning velocity interval: 0.2～0.7m/s
When steel plate arrived straightener 1# grating, the operative employee started special heavy plate aligning pattern according to the steel plate actual conditions:
At first, steel plate to be getting at a high speed the straightener zone, and its velocity amplitude is that (1m/s～2m/s) carries out steel plate with low speed and nips and align, and its velocity amplitude is 0.2～0.7m/s.Thereby realize each control point smooth transition, avoid equipment is impacted.
Secondly, according between steel plate different temperature interval (>=800～＜900 ℃ or >=900～＜1000 ℃) and different caliper zones (>=100～150mm, >=150～200mm and >=200～300mm) carry out the roll gap setting.When steel plate thickness is positioned at >=100～150mm, steel billet temperature is positioned at >=800～＜900 ℃ between the time, the aligning roll gap is h+2mm (h is a steel plate target rolling thickness).When temperature be positioned at >=900～＜1000 ℃ between the time, the aligning roll gap is h+3mm.When steel plate thickness be positioned at other (>=150～200mm and >=200～300mm) caliper zones between the time, smoothing roll is sewn on the corresponding temperature range basis increases 1mm.
Operating personnel align setting according to steel plate information simultaneously, and promptly steel plate adopts the plain-barreled roll aligning, and straightener does not have the anteversion and retroversion momentum, and the inlet roll gap equals to export roll gap.The straightener sequence control procedure do not start high pressure (>=12～25MPa), at low pressure (aligning under >=6～18MPa) states, and the low pressure alarming value of straightener aligning brought up to 18MPa from 12MPa.After straightener possessed the aligning condition, operation interface can show " beginning aligning " button.
Moreover, in the aligning process,, prevent that fortuitous event from taking place, and starts the safeguard protection pattern for protection equipment.In the aligning process of special heavy plate, adopt low pressure aligning pattern, the system pressure that wherein is used for the hydraulic cylinder of press down system is controlled between the 20Mpa-25Mpa.In the aligning process as straightening force occurs and exceed setting value and will start the straightener defencive function, straightener will start the empty pattern of crossing automatically so, promptly align roll gap and open to maximum fast, steel plate empty do not align.
At last, the operative employee confirms that according to strip shape quality the aligning operation finishes.
The characteristics of this method for aligning are to make full use of exploitation special heavy plate straightening process on the existing aligning model based, change the design of distribution straggly up and down of original working roll, adopt the parallel distribution of upper and lower working roll.Efficiently solve the problem that can't align after thickness rolls greater than the 100mm steel plate, steel plate plate strip shape quality is guaranteed, and has satisfied the demand of market to super-thick steel plate, also can play the effect of protection equipment for straightening simultaneously.
The specific embodiment
1, the 200mm thickness steel plate sends steel plate actual size specification and temperature behind mill milling.Straightener is aligned the model precomputation according to the steel plate production information.Steel plate gets into the aligning zone with the speed of 1.2m/s, and detecting steel billet temperature when arriving 1# aligning grating is 970 ℃.
At this moment, operating personnel start special heavy plate aligning pattern, and straightening system starts special heavy plate aligning defence program.It is that (thickness is positioned at the 3rd interval to 205mm, and temperature is positioned at second interval, so the aligning roll gap is set at: steel plate thickness+5mm) that operating personnel manually are provided with the aligning roll gap according to steel plate thickness and actual temperature.Steel plate is set adopts the plain-barreled roll aligning, straightener does not have the anteversion and retroversion momentum, and the inlet roll gap equals to export roll gap.The straightener sequence control procedure does not start high pressure, under low-pressure state, aligns, and the low pressure alarming value of straightener aligning is brought up to 25Mpa.
After straightener possessed the aligning condition, operation interface can show " beginning aligning " button.And startup aligning safeguard protection pattern.Aligning speed is 0.5m/s, and the amount of fascinating is 0.After operating personnel examine relevant parameter, start special heavy plate aligning program and begin aligning, straightening force is 4000KN.
Aligning back steel-plate shape is good, and operating personnel confirm that aligning finishes.
2, the 120mm thickness steel plate sends steel plate actual size specification and temperature behind mill milling.Straightener is aligned the model precomputation according to the steel plate production information.Steel plate gets into the aligning zone with the speed of 1.3m/s, and detecting steel billet temperature when arriving 1# aligning grating is 860 ℃.
At this moment, operating personnel start special heavy plate aligning pattern, and straightening system starts special heavy plate aligning defence program.According to steel plate thickness and actual temperature the aligning roll gap being set manually is that (thickness is positioned at first interval to 122mm, and temperature is positioned at first interval, so the aligning roll gap is set at: steel plate thickness+2mm).Steel plate is set adopts the plain-barreled roll aligning, straightener does not have the anteversion and retroversion momentum, and the inlet roll gap equals to export roll gap.The straightener sequence control procedure does not start high pressure, under low-pressure state, aligns, and the low pressure alarming value of straightener aligning is brought up to 25Mpa.
After straightener possessed the aligning condition, operation interface can show " beginning aligning " button.And startup aligning safeguard protection pattern.Aligning speed is 0.6m/s, and the amount of fascinating is 0.After operating personnel examine relevant parameter, start special heavy plate aligning program and begin aligning, straightening force is 3500KN.
Aligning back steel-plate shape is good, and operating personnel confirm that aligning finishes.
Claims (1)
1. a thermal straightening method that realizes special heavy plate plate shape control is characterized in that, will send the steel plate creation data to straightener at the final pass milling train of steel plate rolling, and straightener carries out the precomputation of special heavy plate aligning; Provide corresponding precomputation parameter then: straightening force scope: 1000KN-5000KN, aligning velocity interval: 0.2～0.7m/s;
When steel plate arrived straightener 1# grating, the operative employee started special heavy plate aligning pattern according to the steel plate actual conditions:
At first, steel plate gets into the straightener zone with the speed of 1m/s～2m/s, carries out steel plate with the speed of 0.2～0.7m/s and nips and align, and realizes each control point smooth transition, avoids equipment is impacted;
Secondly, according to carrying out the roll gap setting between the interval and different caliper zones of steel plate different temperature:
When steel plate thickness is positioned at >=100～150mm, steel billet temperature is positioned at >=800～＜900 ℃ between the time, the aligning roll gap is h+2mm, h is a steel plate target rolling thickness;
When temperature be positioned at >=900～＜1000 ℃ between the time, the aligning roll gap is h+3mm;
When steel plate thickness be positioned at >=150～200mm or >=when 200～300mm was interval, smoothing roll is sewn on the corresponding temperature range basis increased 1mm;
Operating personnel align setting according to steel plate information simultaneously, and promptly steel plate adopts the plain-barreled roll aligning, and straightener does not have the anteversion and retroversion momentum, and the inlet roll gap equals to export roll gap; Under >=6～18MPa state, align, and the low pressure alarming value of straightener aligning is brought up to 18MPa from 12MPa; After straightener possessed the aligning condition, operation interface can show " beginning aligning " button.
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| CN201110347349.9A CN102500658B (en) | 2011-11-07 | 2011-11-07 | Hot straightening method for controlling shape of extra-thick plate |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962419A (en) * | 2014-04-24 | 2014-08-06 | 山西太钢不锈钢股份有限公司 | Method for improving shape of transversely-cut high-strength steel plate |
| CN104438458A (en) * | 2013-09-16 | 2015-03-25 | 宝山钢铁股份有限公司 | Straightening method of head turning steel plate |
| CN105057402A (en) * | 2015-07-17 | 2015-11-18 | 河北钢铁股份有限公司邯郸分公司 | Hot straightening method for low-carbon bainite steel plate with thickness of 25 mm |
| CN107282697A (en) * | 2016-04-04 | 2017-10-24 | 鞍钢股份有限公司 | A kind of hot straightening method of high-strength steel sheet |
| CN108273871A (en) * | 2018-04-09 | 2018-07-13 | 包头钢铁（集团）有限责任公司 | The method of low grade non-oriented silicon steel in coil opener aligning |
| CN108326078A (en) * | 2018-04-09 | 2018-07-27 | 包头钢铁（集团）有限责任公司 | The method that coil opener aligns mild steel |
| CN108526248A (en) * | 2018-04-09 | 2018-09-14 | 包头钢铁（集团）有限责任公司 | The method that coil opener aligns medium carbon steel |
| CN111672933A (en) * | 2020-07-16 | 2020-09-18 | 山东钢铁股份有限公司 | Steel plate straightening method |
| CN114160609A (en) * | 2021-11-18 | 2022-03-11 | 山东钢铁集团日照有限公司 | Method for efficiently cold-straightening thin-gauge buckling steel plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104438458A (en) * | 2013-09-16 | 2015-03-25 | 宝山钢铁股份有限公司 | Straightening method of head turning steel plate |
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| CN105057402A (en) * | 2015-07-17 | 2015-11-18 | 河北钢铁股份有限公司邯郸分公司 | Hot straightening method for low-carbon bainite steel plate with thickness of 25 mm |
| CN107282697A (en) * | 2016-04-04 | 2017-10-24 | 鞍钢股份有限公司 | A kind of hot straightening method of high-strength steel sheet |
| CN108273871A (en) * | 2018-04-09 | 2018-07-13 | 包头钢铁（集团）有限责任公司 | The method of low grade non-oriented silicon steel in coil opener aligning |
| CN108326078A (en) * | 2018-04-09 | 2018-07-27 | 包头钢铁（集团）有限责任公司 | The method that coil opener aligns mild steel |
| CN108526248A (en) * | 2018-04-09 | 2018-09-14 | 包头钢铁（集团）有限责任公司 | The method that coil opener aligns medium carbon steel |
| CN111672933A (en) * | 2020-07-16 | 2020-09-18 | 山东钢铁股份有限公司 | Steel plate straightening method |
| CN114160609A (en) * | 2021-11-18 | 2022-03-11 | 山东钢铁集团日照有限公司 | Method for efficiently cold-straightening thin-gauge buckling steel plate |
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Address after: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei Co-patentee after: Shougang Group Co. Ltd. Patentee after: Qinhuangdao Shouqin Metal Material Co., Ltd. Address before: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei Co-patentee before: Capital Iron & Steel General Company Patentee before: Qinhuangdao Shouqin Metal Material Co., Ltd. |
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Effective date of registration: 20190408 Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee after: Shougang Group Co. Ltd. Address before: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei Co-patentee before: Shougang Group Co. Ltd. Patentee before: Qinhuangdao Shouqin Metal Material Co., Ltd. |
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