CN102500658B - 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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- CN102500658B CN102500658B CN201110347349.9A CN201110347349A CN102500658B CN 102500658 B CN102500658 B CN 102500658B CN 201110347349 A CN201110347349 A CN 201110347349A CN 102500658 B CN102500658 B CN 102500658B
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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 hot plate-straightening machine technical field, a kind of hot straightening method that special heavy plate plate shape is controlled of realizing is particularly provided.
Background technology
Before, after steel plate rolling, to straightener, send Plate Production data, straightener is aligned precomputation according to Steel Plate Information.After straightener pyrometer detects steel plate, will re-start leveler model calculates.11 roller thermal straightening machine design aligning thickness limits are 100mm, and (100～300mm) steel-plate shape after thickness that oversteps the extreme limit can only be decided by milled sheet shape, follow-up without control device.Along with the variation in market and the adjustment of product structure, special heavy plate output progressively increases, and steel plate strip shape quality problem has become the principal contradiction of restriction product quality.Therefore,, if can develop the straightening process of special heavy plate on existing equipment for straightening and process modeling basis, will supplement and new product development generation material impact Levelling principle so.
Summary of the invention
The object of the present invention is to provide a kind of hot straightening method that special heavy plate plate shape is controlled of realizing; not only simple to operate but also safety; efficiently solve thickness and be greater than the problem that cannot align after 100mm steel plate rolls, for the plate shape of special heavy plate is controlled, provide technique guarantee, also can protect equipment for straightening simultaneously.
The present invention is that the final pass milling train at steel plate rolling will send Plate Production data to straightener, and straightener carries out the precomputation of special heavy plate aligning.Then provide corresponding precomputation parameter.Each setting parameter scope is as follows:
Straightening force scope: 1000KN-5000KN
Aligning velocity interval: 0.2～0.7m/s
When steel plate arrives straightener 1# grating, operative employee starts special heavy plate aligning pattern according to steel plate actual conditions:
First, steel plate is to enter straightener region at a high speed, and its velocity amplitude is (1m/s～2m/s), carries out steel plate nip and align with low speed, and its velocity amplitude is 0.2～0.7m/s.Thereby realize each control point smooth transition, avoid equipment to impact.
Secondly, between the temperature range different according to steel plate (900 ℃ of >=800～< or >=900～< 1000 ℃) and different caliper zones (>=100～150mm, >=150～200mm and >=200～300mm) carries out roll gap setting.As be positioned at >=100～150mm of steel plate thickness, steel billet temperature is between 900 ℃ of >=800～< time, and aligning roll gap is h+2mm (h is steel plate target rolling thickness).When temperature is between 1000 ℃ of >=900～< time, aligning roll gap is h+3mm.When steel plate thickness is positioned between other (>=150～200mm and >=200～300mm) caliper zones, smoothing roll is sewn on corresponding temperature range basis increases 1mm.
Operating personnel align setting according to Steel Plate Information simultaneously, and steel plate adopts plain-barreled roll aligning, the unmatched hypsokinesis momentum of straightener, and entrance roll gap equals to export roll gap.Straightener sequence control procedure does not start high pressure (>=12～25MPa), aligns, and the low pressure alarming value of straightener aligning is brought up to 18MPa from 12MPa under low pressure (>=6～18MPa) state.When straightener possesses after aligning condition, operation interface can show " starting aligning " button.
Moreover, in aligning process, for protection equipment, prevent that fortuitous event from occurring, and starts safeguard protection pattern.In the aligning process of special heavy plate, adopt low pressure aligning pattern, wherein the system pressure for the hydraulic cylinder of press down system is controlled between 20Mpa-25Mpa.In aligning process, as occurred that straightening force exceeds setting value and will start straightener defencive function, straightener will start the empty pattern of crossing automatically so, align roll gap and open to fast maximum, and empty mistake of steel plate do not aligned.
Finally, operative employee determines that according to strip shape quality aligning operation finishes.
The feature of this method for aligning is to make full use of on the basis of existing aligning model to develop special heavy plate straightening process, changes the design of the upper and lower distribution straggly of original working roll, adopts the parallel distribution of upper and lower working roll.Efficiently solve thickness and be greater than the problem that cannot align after 100mm steel plate rolls, steel plate strip shape quality is guaranteed, and has met the demand of market to super-thick steel plate, also can play the effect of protection equipment for straightening simultaneously.
The specific embodiment
1,200mm thickness steel plate, after mill milling, sends steel plate actual size specification and temperature.Straightener is aligned model precomputation according to Plate Production information.Steel plate enters aligning region with the speed of 1.2m/s, and while arriving 1# aligning grating, detecting steel billet temperature is 970 ℃.
Now, 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 between Second Region, so smoothing roll seams, is decided to be: steel plate thickness+5mm) that operating personnel manually arrange aligning roll gap according to the temperature of steel plate thickness and reality.Steel plate is set and adopts plain-barreled roll aligning, the unmatched hypsokinesis momentum of straightener, entrance roll gap equals to export roll gap.Straightener sequence control procedure does not start high pressure, aligns, and the low pressure alarming value of straightener aligning is brought up to 25Mpa under low-pressure state.
When straightener possesses after aligning condition, operation interface can show " starting aligning " button.And startup aligning safeguard protection pattern.Aligning speed is 0.5m/s, and the amount of fascinating is 0.Operating personnel examine after relevant parameter, start special heavy plate aligning program and start aligning, and straightening force is 4000KN.
After aligning, steel-plate shape is good, and operating personnel confirm that aligning finishes.
2,120mm thickness steel plate, after mill milling, sends steel plate actual size specification and temperature.Straightener is aligned model precomputation according to Plate Production information.Steel plate enters aligning region with the speed of 1.3m/s, and while arriving 1# aligning grating, detecting steel billet temperature is 860 ℃.
Now, operating personnel start special heavy plate aligning pattern, and straightening system starts special heavy plate aligning defence program.According to the temperature of steel plate thickness and reality, aligning roll gap being manually set is that (thickness is positioned at the first interval to 122mm, and temperature is positioned at the first interval, so smoothing roll seams, is decided to be: steel plate thickness+2mm).Steel plate is set and adopts plain-barreled roll aligning, the unmatched hypsokinesis momentum of straightener, entrance roll gap equals to export roll gap.Straightener sequence control procedure does not start high pressure, aligns, and the low pressure alarming value of straightener aligning is brought up to 25Mpa under low-pressure state.
When straightener possesses after aligning condition, operation interface can show " starting aligning " button.And startup aligning safeguard protection pattern.Aligning speed is 0.6m/s, and the amount of fascinating is 0.Operating personnel examine after relevant parameter, start special heavy plate aligning program and start aligning, and straightening force is 3500KN.
After aligning, steel-plate shape is good, and operating personnel confirm that aligning finishes.
Claims (1)
1. realize the hot straightening method that special heavy plate plate shape is controlled, it is characterized in that, at the final pass milling train of steel plate rolling, will send Plate Production data to straightener, straightener carries out the precomputation of special heavy plate aligning; Then provide corresponding precomputation parameter: straightening force scope: 1000KN-5000KN, aligning velocity interval: 0.2～0.7m/s;
When steel plate arrives straightener 1# grating, operative employee starts special heavy plate aligning pattern according to steel plate actual conditions:
First, steel plate enters straightener region with the speed of 1m/s～2m/s, carries out steel plate nip and align with the speed of 0.2～0.7m/s, realizes each control point smooth transition, avoids equipment to impact;
Secondly, according to carrying out roll gap setting between the different temperature range of steel plate and different caliper zones:
When steel plate thickness is more than or equal to 100, be less than or equal to 150mm, steel billet temperature is more than or equal to 800 while being less than between 900 ℃, and aligning roll gap is h+2mm, and h is steel plate target rolling thickness;
When temperature is more than or equal to 900 while being less than between 1000 ℃, aligning roll gap is h+3mm;
When steel plate thickness is greater than 150, is less than or equal to 200mm or is greater than 200 and be less than or equal to 300mm when interval, smoothing roll is sewn on corresponding temperature range basis increases 1mm;
Operating personnel align setting according to Steel Plate Information simultaneously, and steel plate adopts plain-barreled roll aligning, the unmatched hypsokinesis momentum of straightener, and entrance roll gap equals to export roll gap; Align being more than or equal to 6MPa and being less than or equal under 18MPa state, and the low pressure alarming value of straightener aligning is brought up to 18MPa from 12MPa; When straightener possesses after aligning condition, operation interface can show " starting 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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| CN201110347349.9A CN102500658B (en) | 2011-11-07 | 2011-11-07 | Hot straightening method for controlling shape of extra-thick plate |
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| CN102500658B true CN102500658B (en) | 2014-11-12 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104438458B (en) * | 2013-09-16 | 2016-08-24 | 宝山钢铁股份有限公司 | The method for aligning of nose steel plate |
| CN103962419B (en) * | 2014-04-24 | 2015-10-28 | 山西太钢不锈钢股份有限公司 | A kind of method improving crosscut high strength steel plate plate shape |
| CN105057402B (en) * | 2015-07-17 | 2017-01-25 | 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 | Hot straightening method for high-strength steel plate |
| 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 |
| CN108273871B (en) * | 2018-04-09 | 2020-06-02 | 包头钢铁（集团）有限责任公司 | Method for straightening middle-low grade non-oriented silicon steel by straight-end machine |
| CN111672933A (en) * | 2020-07-16 | 2020-09-18 | 山东钢铁股份有限公司 | Steel plate straightening method |
| CN114515769A (en) * | 2020-11-20 | 2022-05-20 | 宝山钢铁股份有限公司 | Hot straightening method for thick steel plate |
| CN114160609B (en) * | 2021-11-18 | 2023-07-04 | 山东钢铁集团日照有限公司 | Method for efficiently cold straightening thin-specification buckling steel plate |
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| JPS598443B2 (en) * | 1977-11-28 | 1984-02-24 | 川崎製鉄株式会社 | Thick plate planar shape control method |
| JPS5913520A (en) * | 1982-07-15 | 1984-01-24 | Hitachi Ltd | Roll leveler |
| CN1027426C (en) * | 1991-12-21 | 1995-01-18 | 冶金工业部钢铁研究总院 | Method to set up gap values between rollers for rolling medium plates |
| CN101069896B (en) * | 2007-06-15 | 2011-06-01 | 鞍钢股份有限公司 | Medium plate shape control method |
| CN101716618A (en) * | 2009-11-13 | 2010-06-02 | 秦皇岛首秦金属材料有限公司 | Method for penetrating straightening steel plate of thermal straightening machine |
| CN101811141A (en) * | 2010-04-15 | 2010-08-25 | 南京钢铁股份有限公司 | Novel method for controlling plate shape of heavy and medium plate mill |
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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. |