CN109663819A - A method of reducing thick steel plates length direction abnormity amount end to end - Google Patents
A method of reducing thick steel plates length direction abnormity amount end to end Download PDFInfo
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- CN109663819A CN109663819A CN201811377252.0A CN201811377252A CN109663819A CN 109663819 A CN109663819 A CN 109663819A CN 201811377252 A CN201811377252 A CN 201811377252A CN 109663819 A CN109663819 A CN 109663819A
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- Prior art keywords
- steel plate
- abnormity
- steel
- length direction
- rolling
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/72—Rear end control; Front end control
Abstract
The invention discloses a kind of reduction thick steel plates length direction methods that abnormity is measured end to end, particularly suitable for producing the steel plate of 30mm~80mm thickness.The biting speed of first five passage when this method is by rolling thick steel plate, mill speed, the limitation of steel throwing distance and manipulator Special use, the plagiocephaly phenomenon end to end after Wide and Thick Slab thick steel plate rolls has been effectively eliminated, the abnormity amount end to end of steel plate is greatly reduced.Since abnormity amount is reduced thick steel plate end to end, the house amount of cutting of steel plate end to end is reduced, and thick steel plate lumber recovery improves 3% or so, and contract encashment ratio also greatly improves.
Description
Technical field
The present invention relates to technical field of steel rolling more particularly to it is a kind of reduce thick steel plates length direction end to end abnormity amount
Method.
Background technique
Wide and Thick Slab generally will be by broadening rolling, the rolling in extension two stages of rolling in production.When due to rolling
In the direction of the width, the metal flow in the middle part of steel plate edge and steel plate on horizontal and vertical is different, leads to the steel plate rolled
It no matter in the longitudinal direction, still in the direction of the width, is all in drum-shaped, the rectangular degree of steel plate is bad, and generous plate delivery is wanted
Four sides are all cut away, since the rectangular degree of steel plate is bad, cause steel plate edge and end to end cut house amount increase, lumber recovery drop
It is low.This edge is rolled in the steel plate of barrel shape by using three sequences at present, i.e. shaping sequences rolling, spreading sequence
Rolling, extension sequence rolling, and when shaping sequences and spreading sequence are rolled using the board-shape control method of dogbone rolling, so that it may
To eliminate the barrel-shaped of steel plate edge, the rectangular degree of steel plate is improved.This plate shape deflection of steel plate two sides in steel plate rolling is
Uniformly.
The steel plate that wide and heavy plate mill rolls is there are also a kind of shape, and the steel plate parallelogram exactly rolled, steel plate is in length
Plagiocephaly end to end on direction is spent, abnormity amount is big end to end, and causing steel plate to be cut end to end, house amount is big, and the lumber recovery of steel plate is low.This plate shape category
The assymmetrical deformation on steel plate both sides, can not be solved by the methods of dogbone rolling when rolling, and control difficulty is larger, to becoming a useful person
The influence of rate is also larger.
The patent " a method of reduce Wide and Thick Slab cut damage " of publication number " CN 106311757A ", this method passes through optimization
The parameter setting of MAS, that improves the rectangular degree of steel plate to reduce steel plate cuts house amount end to end, can effectively improve the rectangular degree of steel plate.
But this method to steel plate end to end this bad plate shape of plagiocephaly improve without reference to.
A kind of patent " heating rolling method of ultra-wide stainless steel plate " of publication number " 107262532 A of CN ", this method mentions
A kind of high production method of ultra-wide stainless steel plate.This method mainly emphasizes the structure property and straightness control of ultra-wide stainless steel plate
System.To steel plate parallelogram is rolled, the improvement of this bad plate shape of plagiocephaly is not referred to end to end.
A kind of patent " production method of width specification titanium steel composite board " of publication number " 107350285 A of CN ", this method mentions
A kind of high production method of wide specification titanium steel composite board.This method mainly emphasizes the structure property of wide specification titanium steel clad steel plate
And flatness control.To steel plate parallelogram is rolled, end to end the improvement of this bad plate shape of plagiocephaly without reference to.
Summary of the invention
In order to solve the above-mentioned technical problem, the object of the present invention is to provide a kind of reduction thick steel plates length directions end to end
The method of abnormity amount, is particularly suitable for the steel plate of production 30~80mm thickness.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A method of reducing thick steel plates length direction abnormity amount end to end, comprising:
When S1, steel plate rolling the biting speed of first five passage be 0.6m/s~0.8m/s, mill speed be 1.5m/s~
2.2m/s；
Steel throwing distance is 2.3m~2.8m when S2, steel plate rolling；
When S3, first five passes, carried out before steel plate bites manually in per pass, centering force be 120KN~
150KN, after manual centering, the gap that manipulator unclamps is 4~6mm；
When S4, first five passes, for every a time after steel plate bites and generates roll-force, manipulator begins to press against steel plate,
Throw-on pressure is 1.5KN, until the passes finish, manipulator is just opened；
Further, the gap that manipulator unclamps is 5mm.
Further, the steel plate applied to 30~80mm thickness.
Further, mill product with a thickness of 80mm steel plate when, the biting speed of first five passage is 0.6m/s, rolling
Speed is 1.5m/s；Steel throwing distance when steel plate rolling is 2.3m.
Further, mill product with a thickness of 50mm steel plate when, the biting speed of first five passage is 0.7m/s, rolling
Speed is 1.9m/s；Steel throwing distance when steel plate rolling is 2.5m.
Parallelogram is presented in the steel plate rolled, and the main reason for steel plate plagiocephaly is that steel plate is preceding several along its length
When passes, from stopping place before rack to gantry motion during, slab occur skew, in the subsequent operation of rolling,
As rolling pass number increases, steel plate length increase, steel plate end to end plagiocephaly length increase, make the steel plate rolled present parallel four
Side shape.The skew amount of several passage slabs is bigger before when rolling, and the steel plate rolled is longer, then the plagiocephaly length end to end that steel plate rolls
It is bigger.When steel plate rolling from stopping place before rack to gantry motion during, slab occur skew reason mainly have slab
Plate shape is bad, steel throwing distance is too far, improper, rack operation stability difference etc. is arranged in biting speed and mill speed.And slab
Often occur sticking up when rolling, the bad plate shape such as discount, with the progress of production, abrasion increases, roller system of rolling mill Stiffness, rack
Stability inevitably reduces, these influence factors are difficult to solve in a short time in actual production.Therefore steel plate head
Tail plagiocephaly occurs often, causes to cut the increase of house amount end to end, lumber recovery reduces, and contract encashment ratio reduces.The present invention is using lower
Biting speed and mill speed are the shakes in order to reduce slab in rolling, reduce skew when biting, improve bite it is steady
It is qualitative.Closer steel throwing distance is set, is reduced and skew occurs in motion process to reduce move distance of the steel plate to rack
A possibility that.Manual centering is carried out to steel plate before rolling per pass, and manipulator begins to press against steel plate when there is roll-force after biting,
It is in order to which skew does not occur when making steel plate before the rolling with rolling.
After applying the present invention, the phenomenon of plagiocephaly end to end of 30mm~80mm thick steel plate is effectively eliminated, and rolls steel plate and head occurs
The amount of tail plagiocephaly reduces 96% or so than in the past, cuts house amount end to end and greatly reduces, lumber recovery improves 3% or so.Contract is converted
Now rate is also largely increased.
Compared with prior art, advantageous effects of the invention:
1, the plagiocephaly amount end to end of 30mm~80mm thick steel plate, the Head and Tail Shape of steel plate can be greatly reduced using the method for the present invention
Improve, cuts house amount end to end and substantially reduce.
2, it does not need to increase any other equipment using the method for the present invention, does not need to be transformed existing equipment, no yet
Additional investment is needed, it is easy to accomplish in actual production.
3, this method is easy to operate, is easy to realize in production operation at the scene, convenient for the popularization and application of this method.
Specific embodiment
The invention will be further described with reference to embodiments.
Embodiment 1
Mill product is with a thickness of the steel plate of 30mm, and the biting speed of first five passage is 0.8m/s, mill speed 2.2m/
s；Steel throwing distance when steel plate rolling is 2.8m, which carries out before steel plate bites per pass in first five passes
Manual centering, centering force 120KN, after manual centering, the gap that manipulator unclamps is 5mm.When first five passes, per together
Secondary manipulator begins to press against steel plate after steel plate bites and generates roll-force, and throw-on pressure 1.5KN is pushed away until the passes finish
Bed is just opened.Rear steel plate is rolled without plagiocephaly phenomenon end to end.
Embodiment 2
Mill product is with a thickness of the steel plate of 80mm, and the biting speed of first five passage is 0.6m/s, mill speed 1.5m/
s；Steel throwing distance when steel plate rolling is 2.3m, which carries out before steel plate bites per pass in first five passes
Manual centering, centering force 150KN, after manual centering, the gap that manipulator unclamps is 5mm.When first five passes, per together
Secondary manipulator begins to press against steel plate after steel plate bites and generates roll-force, and throw-on pressure 1.5KN is pushed away until the passes finish
Bed is just opened.Rear steel plate is rolled without plagiocephaly phenomenon end to end.
Embodiment 3
Mill product is with a thickness of the steel plate of 50mm, and the biting speed of first five passage is 0.7m/s, mill speed 1.9m/
s；Steel throwing distance when steel plate rolling is 2.5m, which carries out before steel plate bites per pass in first five passes
Manual centering, centering force 130KN, after manual centering, the gap that manipulator unclamps is 5mm.When first five passes, per together
Secondary manipulator begins to press against steel plate after steel plate bites and generates roll-force, and throw-on pressure 1.5KN is pushed away until the passes finish
Bed is just opened.Rear steel plate is rolled without plagiocephaly phenomenon end to end.
Embodiment 4
The mill product of embodiment 4 is with a thickness of the steel plate of 40mm, the biting speed of first five passage is 0.72m/s, rolling
Speed is 1.85m/s；Steel throwing distance when steel plate rolling is 2.6m, and the steel plate is in first five passes, per pass in steel
Plate carries out manual centering before biting, centering force 135KN, after manual centering, the gap that manipulator unclamps is 5mm.First five passage
When rolling, for every a time after steel plate bites and generates roll-force, manipulator begins to press against steel plate, throw-on pressure 1.5KN, until the road
Secondary rolling finishes, and manipulator is just opened.Rear steel plate is rolled without plagiocephaly phenomenon end to end.
The limitation of the biting speed of first five passage, mill speed, steel throwing distance when this method is by rolling thick steel plate
And the Special use of manipulator, the plagiocephaly phenomenon end to end after Wide and Thick Slab thick steel plate rolls has been effectively eliminated, steel is greatly reduced
The abnormity amount end to end of plate.Since abnormity amount is reduced thick steel plate end to end, the house amount of cutting of steel plate end to end is reduced, and thick steel plate lumber recovery improves
3% or so.
Embodiment described above is only that preferred embodiment of the invention is described, and is not carried out to the scope of the present invention
It limits, without departing from the spirit of the design of the present invention, those of ordinary skill in the art make technical solution of the present invention
Various changes and improvements, should all fall into claims of the present invention determine protection scope in.
Claims (5)
1. a kind of reduce the thick steel plates length direction method that abnormity is measured end to end characterized by comprising
The biting speed of first five passage is 0.6m/s~0.8m/s when S1, steel plate rolling, mill speed is 1.5m/s~2.2m/
s；
Steel throwing distance is 2.3m~2.8m when S2, steel plate rolling；
When S3, first five passes, being carried out before steel plate bites manually in per pass, centering force is 120KN~150KN,
After manual centering, the gap that manipulator unclamps is 4~6mm；
When S4, first five passes, for every a time after steel plate bites and generates roll-force, manipulator begins to press against steel plate, is pressed against
Power is 1.5KN, until the passes finish, manipulator is just opened.
2. according to claim 1 reduce the thick steel plates length direction method that abnormity is measured end to end, which is characterized in that push away
The gap that bed unclamps is 5mm.
3. according to claim 1 reduce the thick steel plates length direction method that abnormity is measured end to end, which is characterized in that answer
Steel plate for 30~80mm thickness.
4. according to claim 1 reduce the thick steel plates length direction method that abnormity is measured end to end, which is characterized in that roll
Manufactured goods with a thickness of 80mm steel plate when, the biting speed of first five passage is 0.6m/s, mill speed 1.5m/s；Steel plate rolls
Steel throwing distance when processed is 2.3m.
5. according to claim 1 reduce the thick steel plates length direction method that abnormity is measured end to end, which is characterized in that roll
Manufactured goods with a thickness of 50mm steel plate when, the biting speed of first five passage is 0.7m/s, mill speed 1.9m/s；Steel plate rolls
Steel throwing distance when processed is 2.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811377252.0A CN109663819A (en) | 2018-11-19 | 2018-11-19 | A method of reducing thick steel plates length direction abnormity amount end to end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811377252.0A CN109663819A (en) | 2018-11-19 | 2018-11-19 | A method of reducing thick steel plates length direction abnormity amount end to end |
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|---|---|
| CN109663819A true CN109663819A (en) | 2019-04-23 |
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|---|---|---|---|
| CN201811377252.0A Pending CN109663819A (en) | 2018-11-19 | 2018-11-19 | A method of reducing thick steel plates length direction abnormity amount end to end |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1840252A (en) * | 2005-03-28 | 2006-10-04 | 鞍钢集团新钢铁有限责任公司 | Production process of continuous-casting tandem-rolling coiled sheet of medium thick plate |
| CN1974040A (en) * | 2006-12-08 | 2007-06-06 | 广州珠江钢铁有限责任公司 | Rolling process of hot rolled steel sheet |
| CN103240285A (en) * | 2013-05-16 | 2013-08-14 | 莱芜钢铁集团有限公司 | Method for achieving automatic clamping centering of hot rolling strip steel manipulator |
-
2018
- 2018-11-19 CN CN201811377252.0A patent/CN109663819A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1840252A (en) * | 2005-03-28 | 2006-10-04 | 鞍钢集团新钢铁有限责任公司 | Production process of continuous-casting tandem-rolling coiled sheet of medium thick plate |
| CN1974040A (en) * | 2006-12-08 | 2007-06-06 | 广州珠江钢铁有限责任公司 | Rolling process of hot rolled steel sheet |
| CN103240285A (en) * | 2013-05-16 | 2013-08-14 | 莱芜钢铁集团有限公司 | Method for achieving automatic clamping centering of hot rolling strip steel manipulator |
Non-Patent Citations (1)
| Title |
|---|
| 孙玮等: "《中厚板生产900问》", 31 July 2014, 冶金工业出版社 * |
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Application publication date: 20190423 |