CN104324952A - Control method for load relay of hot continuous rolling thin-specification rolling frame - Google Patents
Control method for load relay of hot continuous rolling thin-specification rolling frame Download PDFInfo
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- CN104324952A CN104324952A CN201410448927.1A CN201410448927A CN104324952A CN 104324952 A CN104324952 A CN 104324952A CN 201410448927 A CN201410448927 A CN 201410448927A CN 104324952 A CN104324952 A CN 104324952A
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Abstract
The invention discloses a control method for a load relay of a hot continuous rolling thin-specification rolling frame. When the thickness of a strip steel finished product is smaller than or equal to 1.6 millimeters, the switch-on/off of the frame load relay is judged according to a frame rolling pressure value; the frame rolling pressure value is equal to the sum of the detection values of pressure detection devices on both sides. According to the method, a frame rolling load relay signal control program is developed specific to a rolling thin specification by making full use of the characteristics of advancement and operability of a computer control technology, the control problem and the major potential hazard of damage to mechanical equipment caused by signal abnormality of the frame load relay are solved and eliminated, the failure time is shortened, the product quality is enhanced, and a good benefit is achieved. The method is suitable for controlling the frame of a hot rolled strip finishing mill.
Description
Technical field
The invention belongs to steel rolling field, the finishing stand being specifically related to hot-continuous-rolling strip steel rolling line controls automatically.
Background technology
There is milling train F0 ~ F6 frame (7 rolling mill) in hot continuous rolling finish rolling district, frame load relay signal is all depended in the pressure, kink, roller, tracing control etc. of each frame, frame load relay signal carries out judgement break-make by the size of draught pressure usually, namely when strip steel head nip frame simultaneously this frame draught pressure be more than or equal to 350 ton hours, frame load relay signal connect; When tail part of band steel leaves frame and draught pressure is less than 350 ton hours, frame load relay signal disconnects.
Along with the increase of Thin Specs steel grade, the unloaded increasing pressure of back segment frame is large, sometimes reaches 600-700 ton, band steel frame load relay is caused to judge to occur extremely, cause direct steel scrap between frame, affect normally carrying out of rolling line production, bring very large economic loss to enterprise.Therefore, the problem of Thin Specs load relay must be solved.
Summary of the invention
The present invention is by exploitation hot continuous rolling thin specification rolling load relay determination methods, reach the normal control that can ensure that frame pressure, kink, roller, tracking when rolling thin gauge strip, ensure the object of the stability contorting between finishing stand, thus ensure that normal and product quality are produced in hot rolling.
technical scheme of the present invention:
Transmission side, the fore side of upper rack depress oil cylinder of the present invention are equipped with pressure sensor respectively; Frame lower support roll bottom transmission side, fore side are equipped with pressure head respectively, and both sides detected pressures sum is frame draught pressure value, and the size of described frame draught pressure value is for judging frame load relay.
Pressure detecting of the present invention is realized by primary computer point-to-point control signal passage SM500, and checkout gear is pressure sensor or pressure head, and pressure sensor adopts HYDAC pressure sensor to realize, and model is: HDA3840-A-0350-124; Pressure head adopts KELK to realize, and model is: SLC2500.
The present invention is after Taiyuan Iron and Steel Co. hot continuous rolling factory finishing mill mill stand control uses, and effect is as follows:
(1) achieve the automatic control of each equipment of finishing stand, eliminate the abnormal major hidden danger to device damage of device action, decrease the cancel closedown time.
(2) ensure that finishing stand rolling load relay signal is normal, solve the load relay abnormal signal problem that the unloaded pressure of thin gauge strip frame causes greatly, avoid the normal impact controlled.
(3) saved fault time, improve product percent of pass, annual 658 yuan of the direct economic benefit obtained.
Detailed description of the invention
Tracking is the function that computer controls detection zone steel, and it can show the actual physical location being with steel, and strip tracking is divided into strip steel head to follow the tracks of and afterbody is followed the tracks of.Tracking signal is the condition that each equipment of frame controls automatically.
Thin Specs mm finishing mill unit back segment frame belt steel rolling pressure is generally: ton F6:1100 ~ 1300 ton, ton F5:1200 ~ 1500, F4:1300 ~ 1600;
The each frame of mm finishing mill unit relative to the physical location value of rolling line starting point is: F0:176 m F1:181.5m F2:187m F3:192.5m F4:198m F5:203.5m F6:209m, computer tracking band steel position draws according to the band steel actual speed of each frame and program scanning Time Calculation, the each machine frame head of band steel, tail tracing positional value window is+2m,-2m, that is be with steel to arrive in frame physical location value+2 m in computer head tracking position and judge frame belt steel rolling pressure changing, at twice program scanning time 10 ~ 20ms, relatively strip steel head draught pressure, if pressure increase reaches 150 ~ 300 tons, corresponding frame strip steel head load relay is connected, band steel arrives in frame physical location value-2m at computer afterbody tracing positional and judges frame belt steel rolling pressure changing, at twice program scanning time 10 ~ 20ms, relatively tail part of band steel frame draught pressure, if pressure decreases by 150 ~ 300 tons, corresponding frame tail part of band steel load relay disconnects.
The normal ON and the disconnection that achieve frame load relay is judged by the belt steel rolling pressure increase and decrease of twice program scanning time.
Embodiment 1: when rolling Q235 specification is 1.5mm*1250mm, the unloaded pressure of F5 frame is 500 tons; The unloaded pressure of F6 frame is 650 tons; If draught pressure value added reaches 300 tons, corresponding frame strip steel head load relay is connected.Therefore, strip steel head arrive distance F5 frame and computer strip steel head tracing positional equal 205.5m(F5 frame physical location value+2 m) time, strip steel head tracking window is opened, the computer scanning time is 10 ms, twice sweep time detecting to frame draught pressure value be respectively 600 tons and 900 tons, then draught pressure value added is 300 tons, therefore judges that F5 frame load relay is connected; Strip steel head arrive distance F6 frame and computer strip steel head tracing positional equal 211m(F6 frame physical location value+2 m) time, strip steel head tracking window is opened, the computer scanning time is 10 ms, twice sweep time detecting to frame draught pressure value be respectively 660 tons and 1000 tons, then draught pressure value added is 340 tons, therefore judges that F6 frame load relay is connected.
Embodiment 2: when rolling container plate specification is 1.4mm*1250mm, the unloaded pressure of F5 frame is 550 tons; The unloaded pressure of F6 frame is 700 tons; If draught pressure range of decrease value reaches 300 tons, corresponding frame tail part of band steel load relay disconnects.Therefore, tail part of band steel distance leave F5 frame and computer tail part of band steel tracing positional equal 201.5m(F5 frame physical location value-2 m) time, tail part of band steel tracking window is opened, the computer scanning time is 10 ms, twice sweep time detecting to frame draught pressure value be respectively 1200 tons and 800 tons, then draught pressure range of decrease value is 400 tons, therefore judges that F5 frame load relay disconnects; Tail part of band steel distance leave F6 frame and computer tail part of band steel tracing positional value equal 207m(F6 frame physical location value-2 m) time, tail part of band steel tracking window is opened, the computer scanning time is 10 ms, twice sweep time detecting to frame draught pressure value be respectively 1060 tons and 700 tons, then draught pressure range of decrease value is 360 tons, therefore judges that F6 frame load relay disconnects.
Claims (1)
1. hot continuous rolling thin specification rolling machine frame load relay control method, when being with steel finished product thickness to be less than or equal to 1.6mm, with computer twice sweep time detecting to the size of frame draught pressure value control frame load relay, namely when frame draught pressure value recruitment reaches 150 ~ 300 ton hours, corresponding frame strip steel head load relay is connected; When frame draught pressure value reduction reaches 150 ~ 300 ton hours, corresponding frame tail part of band steel load relay disconnects;
Described frame draught pressure value equals the detected value sum of pressure at both sides checkout gear;
Described pressure-detecting device comprise following any one: (1) frame lower support roll bottom transmission side install pressure head and fore side install pressure head; (2) pressure sensor of upper rack depress oil cylinder transmission side installation and the pressure sensor of fore side installation;
The detected value of described pressure-detecting device equals both sides pressure head detected pressures value sum or equals pressure at both sides sensor detected pressures value sum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410448927.1A CN104324952B (en) | 2014-09-05 | 2014-09-05 | Hot continuous rolling thin specification rolling machine frame load relay control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410448927.1A CN104324952B (en) | 2014-09-05 | 2014-09-05 | Hot continuous rolling thin specification rolling machine frame load relay control method |
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| CN104324952A true CN104324952A (en) | 2015-02-04 |
| CN104324952B CN104324952B (en) | 2016-04-27 |
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| CN201410448927.1A Active CN104324952B (en) | 2014-09-05 | 2014-09-05 | Hot continuous rolling thin specification rolling machine frame load relay control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862276A (en) * | 2017-02-07 | 2017-06-20 | 山西太钢不锈钢股份有限公司 | Hot tandem rolling special steel main transmission overload control method |
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| JPS5536714A (en) * | 1978-09-06 | 1980-03-14 | Hitachi Ltd | Method of measuring length of divided hot rolled coil |
| JPH04172117A (en) * | 1990-11-02 | 1992-06-19 | Nippon Steel Corp | Method for measuring forward slip on hot rolling mill |
| JPH07178454A (en) * | 1993-12-24 | 1995-07-18 | Toshiba Corp | Slip detecting device of steel rolling mill |
| JPH08215726A (en) * | 1995-02-21 | 1996-08-27 | Toshiba Corp | Bite detector for rolling stock |
| CN1182204A (en) * | 1997-08-28 | 1998-05-20 | 宝山钢铁(集团)公司 | Anti-interference method and device for width measuring instrument used in hot rolling, finish rolling and winding. |
| CN101905242A (en) * | 2010-07-09 | 2010-12-08 | 太原重工股份有限公司 | Roller-lifting proportional and synchronous hydraulic control system |
| CN103240284A (en) * | 2013-03-29 | 2013-08-14 | 广西柳州银海铝业股份有限公司 | Metal sheet machining centering device and metal sheet machining centering method |
| CN103406353A (en) * | 2013-09-02 | 2013-11-27 | 北京科技大学 | Cold-rolled steel strip stretch bending straightening machine with roll shifting function |
-
2014
- 2014-09-05 CN CN201410448927.1A patent/CN104324952B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5536714A (en) * | 1978-09-06 | 1980-03-14 | Hitachi Ltd | Method of measuring length of divided hot rolled coil |
| JPH04172117A (en) * | 1990-11-02 | 1992-06-19 | Nippon Steel Corp | Method for measuring forward slip on hot rolling mill |
| JPH07178454A (en) * | 1993-12-24 | 1995-07-18 | Toshiba Corp | Slip detecting device of steel rolling mill |
| JPH08215726A (en) * | 1995-02-21 | 1996-08-27 | Toshiba Corp | Bite detector for rolling stock |
| CN1182204A (en) * | 1997-08-28 | 1998-05-20 | 宝山钢铁(集团)公司 | Anti-interference method and device for width measuring instrument used in hot rolling, finish rolling and winding. |
| CN101905242A (en) * | 2010-07-09 | 2010-12-08 | 太原重工股份有限公司 | Roller-lifting proportional and synchronous hydraulic control system |
| CN103240284A (en) * | 2013-03-29 | 2013-08-14 | 广西柳州银海铝业股份有限公司 | Metal sheet machining centering device and metal sheet machining centering method |
| CN103406353A (en) * | 2013-09-02 | 2013-11-27 | 北京科技大学 | Cold-rolled steel strip stretch bending straightening machine with roll shifting function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862276A (en) * | 2017-02-07 | 2017-06-20 | 山西太钢不锈钢股份有限公司 | Hot tandem rolling special steel main transmission overload control method |
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| CN104324952B (en) | 2016-04-27 |
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