CN103008361A - Method for controlling bending of steel plate head - Google Patents
Method for controlling bending of steel plate head Download PDFInfo
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- CN103008361A CN103008361A CN2012105697906A CN201210569790A CN103008361A CN 103008361 A CN103008361 A CN 103008361A CN 2012105697906 A CN2012105697906 A CN 2012105697906A CN 201210569790 A CN201210569790 A CN 201210569790A CN 103008361 A CN103008361 A CN 103008361A
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Abstract
The invention discloses a method for controlling the bending of a steel plate head. According to the method, by regulating and optimizing the nipping length and the nipping speed of a steel plate during a rolling process, the bending extent and the bending shape of the steel plate head are controlled, usually the nipping length is controlled to be 0.2m-1.0m, the nipping speed is controlled to be 1.0m/s-2.0m/s, and both or one of the nipping length and the nipping speed can be selected for regulation according to an actual situation during actual operations. By the adoption of the method, part of defects in a traditional control method are made up, the manufactured steel plate head has an excellent shape, which is straight or slightly bends upwards, and the cutting damage caused by the bending in the head and a poor shape is reduced.
Description
Technical field
The invention belongs to the hot rolled heavy plate technical field, specifically, relate to a kind of method of controlling Front End Bending of Plate.
Background technology
Cut deal is after rolling, desirable plate shape is that head is straight, but presents in various degree buckling phenomenon at actual production process light plate head, is divided into being bent downwardly " nose " and being bent upwards " discount ", (seeing also Fig. 1), the bending status of operation of rolling steel plate as shown in Figure 2.Usually, cause the factor of Front End Bending of Plate to have: the upper and lower surface temperature inequality of steel billet, the upper and lower working roll rotating speed difference of milling train, the upper and lower work roll diameter difference of milling train, single pass reduction ratio etc.
Number of patent application is 03113203.0, and name is called " rolled member head shape controlling method ", and a kind of method of improving head-bent by changing the upper working rolls and lower working rolls rotating speed is provided; Number of patent application is 201010351038.0, name is called " a kind of novel board-shape control method of heavy and medium plate mill ", by last passage in the operation of rolling is set as planishing pass, and sets suitable mill speed, gap values between rollers, roll-force etc. and solve the head-bent phenomenons.
In the prior art, controlled by continuous research steel plate head buckling phenomenon, although often the degree of crook of steel plate head is controlled, the steel plate head shape also has the elbow phenomenon to exist, and bad plate shape as shown in Figure 3.
Summary of the invention
Technical problem solved by the invention provides a kind of method of controlling Front End Bending of Plate, so that roll straight or little the sticking up of rear steel plate head, and then improve lumber recovery.
Technical scheme is as follows:
A kind of method of controlling Front End Bending of Plate is stung degree of crook that the steel parameter comes steel plate after the controlled rolling and the shape of steel plate head low-temperature space by what adjust, optimize steel plate.
Further: describedly sting that the steel parameter comprises biting speed or the length of nipping, come the degree of crook of steel plate after the controlled rolling and the shape of steel plate head low-temperature space by adjusting, optimize the biting speed of steel plate or the length of nipping.
Further: adjust described biting speed according to Front End Bending of Plate degree and low-temperature space curved shape, guarantee that steel plate head is good, the scope of described biting speed is between 1.0m/s-2.0m/s.
Further: adjust the described length of nipping according to Front End Bending of Plate degree and low-temperature space curved shape, guarantee that steel plate head is good, the scope of the described length of nipping is between 0.2m-1.0m.
Further: steel rolling adopts low speed to sting the strategy of steel high-speed rolling, namely carries out low speed at the length of interval of nipping that sets and stings steel, just begins increasing speed rolling when nipping length when mill length surpasses.
Further: according to Front End Bending of Plate degree and low-temperature space curved shape, continue to optimize each passage steel plate biting speed and the length of nipping in the operation of rolling, guarantee that the steel plate head shape is good.
Technique effect of the present invention comprises:
Biting speed and the length angle of nipping of steel plate when 1, the present invention is from optimization steel rolling; a kind of method of simple and effective control Front End Bending of Plate phenomenon is provided; so that roll straight or little the sticking up of rear steel plate head, to protection equipment, improve plate shape and then improve lumber recovery important meaning is arranged.
2, adopt the inventive method to remedy the part defective of traditional control method, the steel plate head shape of output is good, is straight or little shape that sticks up, and has reduced the damage of cutting that the bending of excuse section and shape defect cause.
Description of drawings
Fig. 1 is that the prior art light plate rolls up and down crooked schematic diagram of rear steel plate head;
Fig. 2 is prior art light plate head-bent schematic diagram in the operation of rolling;
Fig. 3 is to Front End Bending of Plate bad plate shape schematic diagram Ex post in the prior art;
Fig. 4 is the speed time curve figure in the light plate operation of rolling of the present invention;
Fig. 5 is the temperature profile of operation of rolling light plate among the present invention;
Fig. 6 is the good schematic diagram of light plate head plate shape of the present invention.
The specific embodiment
This patent is studied from the control of another angle to the Front End Bending of Plate phenomenon, by the biting speed of control steel plate and the head-bent of nip length and then control steel plate, avoid steel plate head crooked and bad plate shape shown in Figure 3 to occur, be specially adapted to the control of 550MPa and above high strength steel plate head-bent.The inventive method is controlled Front End Bending of Plate degree and curved shape by nip length and biting speed that adjust to optimize operation of rolling light plate, can be according to actual conditions simultaneously or select wherein a certain parameter to adjust in the practical operation.
Among the present invention, Plate Rolling Process adopts low speed to sting the strategy of steel, increasing speed rolling, low speed throwing steel, and the rate curve of its operation of rolling is seen Fig. 4.
Cut deal rolling, treat plate body generation uneven heat dissipation in the warm process, de-scaling water, frame cooling water, roller-way cooling water and with the factor effects such as heat exchange of surrounding environment under, the heat radiation of steel plate body periphery wants fast than plate body middle part, so steel plate body peripheral temperature low (steel plate integral slab body Temperature Distribution is referring to Fig. 5).And it also is inhomogeneous prolonging width, thickness direction and length direction each several part temperature at low-temperature space, and degree of irregularity is serious when this part is out of shape, and has aggravated to produce the tendency of bad plate shape.Characteristics of the present invention are to set rational biting speed and the length etc. of nipping is stung the steel parameter, and are good to guarantee the steel plate head after rolling.
Rolled piece is nipped, and the roll driving motor bears load behind the milling train, so decline to a certain degree can occur motor speed, and then roll rotational speed is descended.The top and bottom rolls rotating speed is consistent when milling train is unloaded, stings top and bottom rolls rotating speed behind the steel in various degree decline occurs, so that steel plate head upper and lower surface deformation velocity is inconsistent and then bending phenomenon occurs.Therefore need to set rational biting speed, when the milling train bearing load, the decline of top and bottom rolls rotating speed is unlikely to obviously to have influence on the uniformity of steel plate upper and lower surface distortion, and generally the difference according to steel grade, specification is set as 1.0m/s-2.0m/s with biting speed.
Above mention steel rolling and adopt low speed to sting the strategy of steel high-speed rolling, namely carry out low speed at the length of interval of nipping that sets and sting steel, just begin increasing speed rolling when nipping length when mill length surpasses.When nipping length more in short-term, the length of nipping of steel plate is less than head low-temperature zone length, steel plate just begins increasing speed rolling at low-temperature space after low speed is stung steel like this, so that top and bottom rolls because bearing different loads the phenomenon that rotating speed descends in various degree occurs, thereby has influence on the steel plate head shape.When the length of nipping is longer, although be unlikely to occur in the just phenomenon of increasing speed rolling of low-temperature zone, say that from the angle of enhancing productivity the oversize length of nipping also is irrational.Be 0.2m-1.0m according to the difference of steel grade, the specification length setting of will nipping generally.
Biting speed and the length angle of nipping of the present invention's steel plate when optimizing steel rolling; a kind of method of simple and effective control Front End Bending of Plate phenomenon is provided; so that roll straight or little the sticking up of rear steel plate head; to protection equipment, improve plate shape and then improve lumber recovery important meaning is arranged, good steel plate head is as shown in Figure 6.
The below elaborates to concrete application of the present invention.
Use 1:
A kind of method of controlling Warping Phenomenon in Plate Rolling Process, namely on the basis of traditional control method by adjusting steel plate biting speed, the length of nipping and then making straight or little the sticking up of steel plate head.Take rolling 20mm Q550D as example, the length setting of nipping is 0.7m, biting speed is set as 1.5m/s, it is good that steel plate rolls rear glacing flatness, head " does not upwarp " or " lower button " largely, bad shape shown in Figure 3 simultaneously, does not occur at the head low-temperature space in true form as shown in Figure 6 yet.
Use 2:
A kind of method of controlling Warping Phenomenon in Plate Rolling Process, namely on the basis of traditional control method by adjusting steel plate biting speed, the length of nipping and then making straight or little the sticking up of steel plate head.Take rolling 30mm Q690D as example, the length setting of nipping is 0.6m, biting speed is set as 1.65m/s, it is good that steel plate rolls rear glacing flatness, head " does not upwarp " or " lower button " largely, bad shape shown in Figure 3 simultaneously, does not occur at the head low-temperature space in true form as shown in Figure 6 yet.
Claims (6)
1. method of controlling Front End Bending of Plate is characterized in that: sting degree of crook that the steel parameter comes steel plate after the controlled rolling and the shape of steel plate head low-temperature space by what adjust, optimize steel plate.
2. the method for control Front End Bending of Plate as claimed in claim 1, it is characterized in that: describedly sting that the steel parameter comprises biting speed or the length of nipping, come the degree of crook of steel plate after the controlled rolling and the shape of steel plate head low-temperature space by adjusting, optimize the biting speed of steel plate or the length of nipping.
3. the method for control Front End Bending of Plate as claimed in claim 2, it is characterized in that: adjust described biting speed according to Front End Bending of Plate degree and low-temperature space curved shape, guarantee that steel plate head is good, the scope of described biting speed is between 1.0m/s-2.0m/s.
4. the method for control Front End Bending of Plate as claimed in claim 2 is characterized in that: adjust the described length of nipping according to Front End Bending of Plate degree and low-temperature space curved shape, guarantee that steel plate head is good, the scope of the described length of nipping is between 0.2m-1.0m.
5. the method for control Front End Bending of Plate as claimed in claim 2, it is characterized in that: steel rolling adopts low speed to sting the strategy of steel high-speed rolling, namely carry out low speed at the length of interval of nipping that sets and sting steel, just begin increasing speed rolling when nipping length when mill length surpasses.
6. the method for control Front End Bending of Plate as claimed in claim 2, it is characterized in that: in the operation of rolling according to Front End Bending of Plate degree and low-temperature space curved shape, continue to optimize each passage steel plate biting speed and the length of nipping, guarantee that the steel plate head shape is good.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210569790.6A CN103008361B (en) | 2012-12-25 | 2012-12-25 | Method for controlling bending of steel plate head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210569790.6A CN103008361B (en) | 2012-12-25 | 2012-12-25 | Method for controlling bending of steel plate head |
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| CN103008361A true CN103008361A (en) | 2013-04-03 |
| CN103008361B CN103008361B (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210569790.6A Withdrawn - After Issue CN103008361B (en) | 2012-12-25 | 2012-12-25 | Method for controlling bending of steel plate head |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103230943A (en) * | 2013-04-28 | 2013-08-07 | 内蒙古包钢钢联股份有限公司 | Method for improving bending of head portion of medium plate |
| CN103302106A (en) * | 2013-07-09 | 2013-09-18 | 济钢集团有限公司 | Thick steel plate straightness improvement method and control method thereof in rolling process |
| CN109663814A (en) * | 2018-11-19 | 2019-04-23 | 包头钢铁（集团）有限责任公司 | A method of reduce think gauge abrasion-resistant stee steel plate end to end with plate body thickness difference |
| CN112718873A (en) * | 2020-12-14 | 2021-04-30 | 攀钢集团攀枝花钢钒有限公司 | Method for improving straightness of front end part of steel rail |
| CN113333479A (en) * | 2021-06-08 | 2021-09-03 | 大力神铝业股份有限公司 | Method for head upturned deformation in aluminum alloy plate rolling process |
| CN114042752A (en) * | 2021-11-10 | 2022-02-15 | 山东钢铁集团日照有限公司 | Treatment process of large-thickness small-size blank and application thereof |
Citations (3)
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| JPH01241314A (en) * | 1988-03-24 | 1989-09-26 | Sumitomo Metal Ind Ltd | Method for controlling plate camber in hot rolling mill |
| JP2006007307A (en) * | 2004-06-29 | 2006-01-12 | Sumitomo Metal Ind Ltd | Method for manufacturing steel plate |
| CN102527735A (en) * | 2011-12-23 | 2012-07-04 | 秦皇岛首秦金属材料有限公司 | Method for controlling even deformation of edge portion in medium-thick board rolling |
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2012
- 2012-12-25 CN CN201210569790.6A patent/CN103008361B/en not_active Withdrawn - After Issue
Patent Citations (3)
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|---|---|---|---|---|
| JPH01241314A (en) * | 1988-03-24 | 1989-09-26 | Sumitomo Metal Ind Ltd | Method for controlling plate camber in hot rolling mill |
| JP2006007307A (en) * | 2004-06-29 | 2006-01-12 | Sumitomo Metal Ind Ltd | Method for manufacturing steel plate |
| CN102527735A (en) * | 2011-12-23 | 2012-07-04 | 秦皇岛首秦金属材料有限公司 | Method for controlling even deformation of edge portion in medium-thick board rolling |
Non-Patent Citations (3)
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| 何绪友等: "钢板动态速比调控技术的分析与应用", 《山东冶金》 * |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103230943A (en) * | 2013-04-28 | 2013-08-07 | 内蒙古包钢钢联股份有限公司 | Method for improving bending of head portion of medium plate |
| CN103230943B (en) * | 2013-04-28 | 2016-04-20 | 内蒙古包钢钢联股份有限公司 | Improve the method for Warping Phenomenon in Plate Rolling Process |
| CN103302106A (en) * | 2013-07-09 | 2013-09-18 | 济钢集团有限公司 | Thick steel plate straightness improvement method and control method thereof in rolling process |
| CN103302106B (en) * | 2013-07-09 | 2015-04-08 | 济钢集团有限公司 | Thick steel plate straightness improvement method and control method thereof in rolling process |
| CN109663814A (en) * | 2018-11-19 | 2019-04-23 | 包头钢铁（集团）有限责任公司 | A method of reduce think gauge abrasion-resistant stee steel plate end to end with plate body thickness difference |
| CN112718873A (en) * | 2020-12-14 | 2021-04-30 | 攀钢集团攀枝花钢钒有限公司 | Method for improving straightness of front end part of steel rail |
| CN113333479A (en) * | 2021-06-08 | 2021-09-03 | 大力神铝业股份有限公司 | Method for head upturned deformation in aluminum alloy plate rolling process |
| CN114042752A (en) * | 2021-11-10 | 2022-02-15 | 山东钢铁集团日照有限公司 | Treatment process of large-thickness small-size blank and application thereof |
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| Publication number | Publication date |
|---|---|
| CN103008361B (en) | 2015-06-03 |
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