CN101979167A - Method for positioning roll seam of roughly rolling vertical miller - Google Patents
Method for positioning roll seam of roughly rolling vertical miller Download PDFInfo
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- CN101979167A CN101979167A CN 201010227111 CN201010227111A CN101979167A CN 101979167 A CN101979167 A CN 101979167A CN 201010227111 CN201010227111 CN 201010227111 CN 201010227111 A CN201010227111 A CN 201010227111A CN 101979167 A CN101979167 A CN 101979167A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012937 correction Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 230000004044 response Effects 0.000 abstract description 4
- 230000033764 rhythmic process Effects 0.000 description 5
- 238000003801 milling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003079 width control Methods 0.000 description 1
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Abstract
The invention relates to a method for positioning the roll seam of a roughly rolling vertical miller, which comprises the following steps: (1) a roughly rolling vertical miller receives a primary set value; (2) adopting a side pressing screw for positioning the roll seam initially; (3) allowing the roughly rolling vertical miller to receive a secondary set value; and (4) judging if the difference between the primary set value and the secondary set value is smaller than a preset threshold, and adopting an AWC hydraulic cylinder for positioning the roll seam for a second time if the difference is smaller than the preset threshold, or adopting the side pressing screw for positioning the roll seam for a second time. In the invention, a process of positioning by combining a hydraulic cylinder and a pressing mechanism is adopted, the characteristic of large stroke of the electric pressing mechanism and the characteristics of quick response and positioning speed of the hydraulic cylinder are fully used, the positioning speed of the secondary set value of the vertical mill is improved, the waiting time of a steel blank before the mill is reduced, the rolling cycle is shortened, the roll seam positioning precision is improved, and the roll seam interference precision of operators is improved.
Description
Technical field
The present invention relates to roll gap positioning control technology field, particularly relate to the method for a kind of rough rolling vertical roller mill roll gap location.
Background technology
Under the side pressure of rougher of hot strip mill vertical miller, system generally is made up of electronic side pressure and AWC hydraulic cylinder two parts, and electronic side pressure is responsible for when steel rolling not, rough rolling vertical roller mill is carried out between two rollers opening degree regulate.On peaceful steel 1780 hot tandem rolling broad strip mills, intermesh determination is mainly finished by electronic side pressure, and the AWC hydraulic cylinder is mainly finished the short stroke control of band steel toe tail and the automatic width control of belt body.What the control mode of electronic side pressure adopted is APC automated location control mode.
Under this control mode, mainly there is following defective:
1) the roll gap location is slow.Because the response and the locating speed of pressure measurement motor are slower, especially when the physical location of side pressure screw approaches desired value.In order to guarantee the positioning accuracy of side pressure screw, the speed of side pressure motor is slowed down according to the square root curve of position deviation, and positioning time is long.
2) influence of rolled rhythm.In automatic rolling process, the fixed value of roller slit of rough rolling vertical roller mill will issue the secondary setting value after width gage detects width of steel billet before roughing.And width gage is generally apart from the close together of vertical miller, and the secondary intermesh determination of vertical miller uses electronic side pressure to finish, and slab or intermediate blank need need to wait for the vertical miller location before milling train, rolling rhythm is had bigger influence.
3) electronic screw-down can not guarantee that roll gap all is a depressed state from big to small, is prone to the housing screw gap, thereby influences actual roll gap precision, influences width accuracy.
When 4) operator's opposite roller roll gap was intervened, the roll gap location response was slow, and the gap values between rollers deviation is bigger, and it is overproof to be prone to width.
Summary of the invention
Technical problem to be solved by this invention provides the method for a kind of rough rolling vertical roller mill roll gap location, improve the locating speed of vertical miller secondary setting value, avoid the wait of steel billet before milling train, improve rolling rhythm, improve the roll gap positioning accuracy, improve operating personnel's roll gap and intervene precision.
The technical solution adopted for the present invention to solve the technical problems is: the method for a kind of rough rolling vertical roller mill roll gap location is provided, may further comprise the steps:
(1) rough rolling vertical roller mill receives once setting value;
(2) adopting the side pressure screw to carry out roll gap according to the once setting value that receives just locatees;
(3) rough rolling vertical roller mill receives the secondary setting value;
(4) judge that once difference between setting value and the secondary setting value whether less than predefined limits value, if less than predefined limits value, then adopts the AWC hydraulic cylinder to carry out the roll gap secondary according to the secondary setting value that receives and locatees; Otherwise adopt the side pressure screw to carry out roll gap secondary location according to the secondary setting value that receives.
In described step (2), first locating accuracy requirement is ± 0.5mm.
Once setting value is 880mm～1650mm in described step (1).
In described step (3) secondary setting value setting value once ± 5mm in variation.
Limits value in described step (4) once set value according to second computer and secondary setting value between maximum variable quantity and the stroke of AWC hydraulic cylinder set.
Preceding in described step (1) with the zero clearing of AWC hydraulic cylinder correction value.
Beneficial effect
Owing to adopted above-mentioned technical scheme, the present invention compared with prior art has following advantage and good effect: because electronic screw-down and AWC hydraulic cylinder divide the work and unite, thereby improved locating speed and precision, slab need not waited for before milling train, improves rolling rhythm.This method does not need original equipment is transformed, and can come into operation at once, and implementation is quite convenient.
Description of drawings
Fig. 1 is a control flow chart of the present invention.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiments of the present invention relate to the method for a kind of rough rolling vertical roller mill roll gap location, this method is utilized hydraulic cylinder and screw-down alignment by union technology, make full use of the fast characteristics of response, locating speed of the big stroke and the hydraulic cylinder of electronic screw-down, thereby overcome the defective that the location is slow, precision is low.As shown in Figure 1, its concrete steps are as follows: at first, and with the zero clearing of AWC hydraulic cylinder correction value.Secondly, rough rolling vertical roller mill receives once setting value, and the scope that normal conditions set value next time is at 880mm～1650mm.Then, adopt the side pressure screw of screw-down to carry out roll gap according to the once setting value that receives and just locate, reduced the requirement of APC automated location control accuracy, be reduced to ± 0.5mm, increased the speed of location from ± 0.1mm at this.Then, rough rolling vertical roller mill receives the secondary setting value, general secondary setting value setting value once ± 5mm in variation.At last, judge that once whether setting value and the secondary difference between setting value is less than predefined limits value, if less than predefined limits value, then adopt the AWC hydraulic cylinder to carry out accurately roll gap secondary location according to the secondary setting value that receives, utilize the AWC hydraulic cylinder to participate in the location, improve the locating speed of secondary setting value.Because the secondary setting value is to the once correction of setting value, generally and once the deviation between setting value is less, and the stroke of vertical miller AWC cylinder design is longer at present, can satisfy the compensation of secondary setting value deviation fully.If once the difference between setting value and the secondary setting value is more than or equal to predefined limits value, then still adopt the side pressure screw to carry out roll gap secondary location according to the secondary setting value that receives, avoid the correction value between secondary fixed value of roller slit under special circumstances and fixed value of roller slit excessive, the stroke of AWC hydraulic cylinder can't satisfy the requirement of location and produce the location mistake.In addition, when artificial roll gap was intervened, the intervention value used the AWC hydraulic cylinder to reorientate during less than limits value; The intervention value adopts AWC hydraulic cylinder and screw-down alignment by union during greater than limits value.Wherein, limits value can according to second computer once set value and secondary setting value between the maximum variable quantity and the stroke of AWC hydraulic cylinder set and adjust.Such as the stroke of AWC hydraulic cylinder is 60mm, and in the normal operation of rolling, general AWC hydraulic cylinder is at meta, and promptly the variable scope of hydraulic cylinder is ± 30mm; Consider safety factor, the maximum adjustment amount of AWC hydraulic cylinder can not exceed ± 25mm; Consider the adjustment amount of short stroke and AWC again, so AWC hydraulic cylinder location adjustment amount can not exceed ± 10mm.Because once the maximum variable quantity between setting value and secondary setting value is approximately 5mm, the stroke of hydraulic cylinder can satisfy fully, considers the surplus of location, so limits value is set at 6mm.
Rise in October, 2009, and this method begins to try out at Ningbo iron and steel 1780 hot rolling lines, and effect is fine.At first the E1 vertical miller has been carried out the roll gap location and used, obviously improved locating speed, edger roll has dropped to below the 1.0s from 4-5s positioning time.In actual production process, do not find that roll gap runs phenomenon, particularly first passage, solved that width differs bigger phenomenon between two blocks of steel.
Rise in March, 2010, and this method is used on the E2 vertical miller, and effect is more remarkable.Except possessing the advantage after the E1 milling train improves, improved E2 vertical miller rhythm effectively.When adopting former location mode, when the roughing zone adopted single chassis to produce, the E2 vertical miller rolling cycle is the shortest to be 210s, and after employing this method, the cycle shortens to 165s, and production efficiency significantly improves.
After adopting this method, operating personnel have felt that the convenience of width intervention is with in time.When hot charging slab and the transition of cold charge slab, behind the manual intervention roll gap, the strip width hit rate significantly improves; The uniformity of adjacent two strip widths also significantly promotes.Hot-strip width hit rate rises to more than 99.4% from 98.8%, and the width hit rate has improved 0.6 percentage point.Simultaneously, the fluctuation of the width of monovolume band steel also narrows gradually, and the fluctuation of whole at present volume width is from dropping to below the 10mm more than the 15mm.
Claims (6)
1. the method for a rough rolling vertical roller mill roll gap location is characterized in that, may further comprise the steps:
(1) rough rolling vertical roller mill receives once setting value;
(2) adopting the side pressure screw to carry out roll gap according to the once setting value that receives just locatees;
(3) rough rolling vertical roller mill receives the secondary setting value;
(4) judge that once difference between setting value and the secondary setting value whether less than predefined limits value, if less than predefined limits value, then adopts the AWC hydraulic cylinder to carry out the roll gap secondary according to the secondary setting value that receives and locatees; Otherwise adopt the side pressure screw to carry out roll gap secondary location according to the secondary setting value that receives.
2. the method for rough rolling vertical roller mill roll gap according to claim 1 location is characterized in that, in described step (2), first locating accuracy requirement is ± 0.5mm.
3. the method for rough rolling vertical roller mill roll gap according to claim 1 location is characterized in that once setting value is 880mm～1650mm in described step (1).
4. the method for rough rolling vertical roller mill roll gap according to claim 1 location is characterized in that, in described step (3) the secondary setting value setting value once ± 5mm in variation.
5. the method for rough rolling vertical roller mill roll gap according to claim 1 location, it is characterized in that, the limits value in described step (4) once set value according to second computer and secondary setting value between maximum variable quantity and the stroke of AWC hydraulic cylinder set.
6. the method for rough rolling vertical roller mill roll gap according to claim 1 location is characterized in that, and is preceding with the zero clearing of AWC hydraulic cylinder correction value in described step (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010227111 CN101979167A (en) | 2010-07-14 | 2010-07-14 | Method for positioning roll seam of roughly rolling vertical miller |
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| CN 201010227111 CN101979167A (en) | 2010-07-14 | 2010-07-14 | Method for positioning roll seam of roughly rolling vertical miller |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102989780A (en) * | 2011-09-19 | 2013-03-27 | 宝山钢铁股份有限公司 | Electricity-saving control device and control method for vertical mill |
| CN103121040A (en) * | 2011-11-18 | 2013-05-29 | 宝山钢铁股份有限公司 | Rapid detection method of tandem rolling rack condition |
| CN105290120A (en) * | 2015-10-30 | 2016-02-03 | 莱芜钢铁集团有限公司 | Automatic control method, device and system for rolling mill roller gaps |
| CN107088584A (en) * | 2016-02-17 | 2017-08-25 | 宝山钢铁股份有限公司 | The interlock protection control method and system of vertical miller |
| CN114951306A (en) * | 2022-06-21 | 2022-08-30 | 湖南华菱湘潭钢铁有限公司 | A method for controlling the roll gap of a medium and heavy plate vertical roll mill |
| CN115780531A (en) * | 2022-12-08 | 2023-03-14 | 鞍钢股份有限公司 | Roughing mill roll gap APC steel bar feeding control method based on manual intervention judgment |
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| EP0129633A1 (en) * | 1983-06-27 | 1985-01-02 | Centro-Morgardshammar Ab | A mounting for a roll unit, particularly in a wire rod mill |
| RU2170152C2 (en) * | 1998-11-02 | 2001-07-10 | Открытое акционерное общество "Электростальский завод тяжелого машиностроения" | Three-roll stand of screw rolling mill |
| KR20040025282A (en) * | 2002-09-19 | 2004-03-24 | 주식회사 포스코 | Apparatus for controlling zero point of roll gap in mill stand |
| CN1546249A (en) * | 2003-12-10 | 2004-11-17 | 东北大学 | Non-retraction variable precision fast roll gap setting method for medium and heavy plate mill |
| CN1958183A (en) * | 2006-10-16 | 2007-05-09 | 马鞍山钢铁股份有限公司 | Control method for zero adjusting rollers in universal type rolling mill |
| CN100998996A (en) * | 2007-01-10 | 2007-07-18 | 攀枝花新钢钒股份有限公司 | Zero setting rolling pressure acquisition method for rolling mill |
| JP2008132537A (en) * | 2006-10-27 | 2008-06-12 | Nippon Steel Corp | Method for producing agglomerate using roll agglomeration machine and roll agglomeration machine |
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2010
- 2010-07-14 CN CN 201010227111 patent/CN101979167A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0129633A1 (en) * | 1983-06-27 | 1985-01-02 | Centro-Morgardshammar Ab | A mounting for a roll unit, particularly in a wire rod mill |
| RU2170152C2 (en) * | 1998-11-02 | 2001-07-10 | Открытое акционерное общество "Электростальский завод тяжелого машиностроения" | Three-roll stand of screw rolling mill |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102989780A (en) * | 2011-09-19 | 2013-03-27 | 宝山钢铁股份有限公司 | Electricity-saving control device and control method for vertical mill |
| CN102989780B (en) * | 2011-09-19 | 2014-12-24 | 宝山钢铁股份有限公司 | Electricity-saving control device and control method for vertical mill |
| CN103121040A (en) * | 2011-11-18 | 2013-05-29 | 宝山钢铁股份有限公司 | Rapid detection method of tandem rolling rack condition |
| CN103121040B (en) * | 2011-11-18 | 2015-03-04 | 宝山钢铁股份有限公司 | Rapid detection method of tandem rolling rack condition |
| CN105290120A (en) * | 2015-10-30 | 2016-02-03 | 莱芜钢铁集团有限公司 | Automatic control method, device and system for rolling mill roller gaps |
| CN107088584A (en) * | 2016-02-17 | 2017-08-25 | 宝山钢铁股份有限公司 | The interlock protection control method and system of vertical miller |
| CN114951306A (en) * | 2022-06-21 | 2022-08-30 | 湖南华菱湘潭钢铁有限公司 | A method for controlling the roll gap of a medium and heavy plate vertical roll mill |
| CN115780531A (en) * | 2022-12-08 | 2023-03-14 | 鞍钢股份有限公司 | Roughing mill roll gap APC steel bar feeding control method based on manual intervention judgment |
| CN115780531B (en) * | 2022-12-08 | 2023-10-20 | 鞍钢股份有限公司 | Roughing mill roll gap APC steel bar feeding control method based on manual intervention judgment |
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Application publication date: 20110223 |