CN103008359B - Thin material threading control method for guide rulers of hot rolling coiler - Google Patents
Thin material threading control method for guide rulers of hot rolling coiler Download PDFInfo
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- CN103008359B CN103008359B CN201210559466.6A CN201210559466A CN103008359B CN 103008359 B CN103008359 B CN 103008359B CN 201210559466 A CN201210559466 A CN 201210559466A CN 103008359 B CN103008359 B CN 103008359B
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Abstract
The invention provides a thin material threading control method for guide rulers of a hot rolling coiler. The method comprises the following steps of: additionally arranging a pressure sensor, and additionally arranging an analog quantity input plate and a corresponding program in a PLC (Programmable Logic Controller); when steel is fed through a second frame, setting the opening degrees of the guide rulers by using a secondary computer: when the head part of a steel strip arrives at the middle position of each guide ruler, controlling to start up a primary short stroke and a second short stroke in sequence on the working sides and transmission sides of the guide rulers by using the PLC; judging whether the WS clamping force feedback on the working sides of the guide rulers is more than or equal to 7KN and can last for 50 milliseconds or not at the moment after, and if so, directly switching to a guide ruler working side pressure automatic control way; otherwise, setting a third short stroke: if the working sides of the guide rulers never meet a switching condition, directly switching to an AFC (Automatic Frequency Control) way after the third short strokes of the working sides of the guide rulers are completed. Due to the adoption of the method, the 'inner tower' phenomenon and head cutting loss of a steel coil can be eliminated, the total sealing rate is controlled to be below 1.8 percent, the hot rolling coiling quality is improved greatly, and rolling yield is increased greatly, and the recoiling quantity of sub-coils is reduced by over 30 percent.
Description
Technical field
The invention belongs to steel rolling process technical field, relate in particular to a kind of for hot rolling coiler jig thin material threading control method.
Background technology
Before every coiling machine of hot-strip, there is a pair of jig, in order to clamp steel plate, guarantee that plate centre line overlaps as far as possible with rolling centerline, article two, center line approaches coincidence, band steel center line is more stable, finished steel coils scroll is better, and especially when thin material threading, jig clamping speed plays a key effect to steel coil head turriform.
Hot rolling thin material coiling machine threading speed reaches 12m/s, band steel head arrives jig centre position (jig HMD) moment jig and starts action, jig switches to automatic pressure and controls (AFC) mode after twice short stroke closed, until the actual steel plate that is clamped to of jig, the used time is at least about 4.4s altogether.While being with steel below producing 2.50mm, due to the existence of the own mechanical friction power of jig and unstable, existing detection means cannot be rejected completely by computational methods, and this gauge strip steel jig AFC is set as 10kN left and right simultaneously, and control the given computational methods of servo valve, is:
Servo valve is given=(AFC setting-AFC feedback) * proportional control factor+penalty constant.
Because general frictional force feedback is in 5-8kN left and right, therefore will cause servo valve output less than normal, thereby jig clamping strip speed is very slow.Jig HMD is 5.7m to reel distance, therefore be with the steel 52.8m that walked during this period, and head average about 4.5m mono-circle while batching, when jig is clamped to band steel, coiling machine has at least batched 10 circles, this 10 astragal steel center line is free state completely, even sometimes, when producing 1.6mm container thin material, because chucking power setting is very little, often appearance has been batched 20 multi-turn jigs and has not also been clamped to the situation of steel plate.Therefore when 3.0mm and the production of following gauge strip steel, 30% the band steel of having an appointment has seriously " interior tower " phenomenon through batching occiput, need to remove bundling rewinding, even wherein have an appointment 1% steel coil head 10-50m left and right by waste product excision, caused significant impact to hot-rolled finished product quality, lumber recovery and cost control.
Summary of the invention
Object of the present invention is intended to eliminate above-mentioned defect, thereby a kind of hot rolling thin material lumber recovery that improves is provided, and improves hot-rolled finished product volume scroll, improve the quality of products, and the hot rolling coiler jig thin material threading control method reducing production costs.
For this reason, the solution that the present invention takes is:
A hot rolling coiler jig thin material threading control method, comprises PLC(programmable logic controller), second computer and detect 2# hydraulic cylinder piston and the pressure sensor of cylinder bar pressure, it is characterized in that:
One group of pressure sensor is installed, is detected 1# hydraulic cylinder piston and cylinder bar pressure; In PLC, set up analog input, and revision establishment jig opening degree setting program, pressure feedback calculation procedure, strip tracking program and jig opening degree and pressure automatic control program, while being with steel between two hydraulic cylinder active regions, two pressure feedback are averaged as the actual clamping of jig plate pressure;
The concrete control procedure of jig is:
1, jig maintains the last opening degree of setting, and when first frame of finish rolling is entered steel, this piece of jig opening degree steel is set and started, and data check is errorless rear to second computer transmission data receiver settling signal;
2,, when second frame of finish rolling entered steel, jig is carried out second computer and is set opening degree:
One-sided jig is set opening degree=(strip width+second computer is set width allowance+mono-time short stroke allowance+secondary short stroke allowance)/2;
3, when band steel head arrives jig centre position, PLC controls jig active side and short stroke of jig transmission side starts, whether jig both sides, and continue to detect a short stroke and complete to steel plate 100 mm that advance with maximal rate, until a short stroke finishes;
When 4, a short stroke completes, PLC carries out jig active side and jig transmission side secondary short stroke starts, and whether jig both sides, and continue to detect secondary short stroke and complete to steel plate 50 mm that advance with maximal rate, until secondary short stroke finishes;
5, after secondary short stroke completes, whether PLC judges now jig active side chucking power feedback >=7KN and lasting 50ms, if condition meets, is directly switch to jig active side pressure automatic control AFC control mode, and jig transmission side remains unchanged; Otherwise jig transmission side, jig active side are carried out three short strokes and are set: three short strokes are set opening degree=secondary and set strip width/2; Jig transmission side is carried out three short strokes always and is set, until three short strokes are complete; And jig active side continues whether judge chucking power >=and 7KN and lasting 50 ms, once condition meets, jig active side abandons carrying out three short strokes settings, converts rapidly AFC control mode to; If carry out jig active side in three short stroke processes, never meet AFC control mode switching condition, the complete rear AFC control mode that directly switches to of three short strokes of jig active side.
Beneficial effect of the present invention is:
After the present invention puts into operation, eliminated the head excision loss of batching " interior tower " phenomenon of rear coil of strip and causing thus, owing to batching the blockade that jig reason causes, greatly reduce, total blocking rate is controlled at below 1.8%, not only greatly improve hot rolling reeling quality and rolling line lumber recovery, reduced production cost, and reduced bundling rewinding amount more than 30%, improve hot-rolled finished product volume scroll, the various expenses such as can reduce that the auxiliary equipment such as crane, Hydraulic Station and material are had bad luck simultaneously.
Accompanying drawing explanation
Fig. 1 is hot rolling coiler jig thin material threading control flow chart.
The specific embodiment
Hot rolling coiler jig thin material threading control method of the present invention, be at original PLC, second computer and detect on the basis of pressure sensor of 2# hydraulic cylinder piston and cylinder bar pressure, installed again one group of pressure sensor that detects 1# hydraulic cylinder piston and cylinder bar pressure additional; In PLC, set up M35N analog input simultaneously, and revision establishment jig opening degree setting program, pressure feedback calculation procedure, strip tracking program and jig opening degree and pressure automatic control program, while being with steel between two hydraulic cylinder active regions, two pressure feedback are averaged as the actual clamping of jig plate pressure.
The concrete control procedure of jig is:
1, jig maintains the last opening degree of setting, and when first frame of finish rolling (F1) is entered steel, this piece of jig opening degree steel is set and started, and data check is errorless rear to second computer transmission data receiver settling signal.
2,, when second frame of finish rolling (F2) entered steel, jig is carried out second computer and is set opening degree:
One-sided jig is set opening degree=(strip width+second computer is set width allowance+mono-time short stroke allowance+secondary short stroke allowance)/2
Complete rear wait band steel head arrives jig centre position (jig HMD).
3, when band steel head arrival jig HMD signal comes, PLC controls jig active side (jig WS) and short stroke of jig transmission side (jig DS) starts, jig both sides with maximal rate to steel plate 100 mm that advance, and continue to detect a short stroke and whether complete, until a short stroke finishes.
When 4, a short stroke settling signal comes, PLC carries out jig WS and bis-short strokes of jig DS start, and whether jig both sides, and continue to detect secondary short stroke and complete to steel plate 50 mm that advance with maximal rate, until secondary short stroke finishes.
5, after secondary short stroke settling signal comes, PLC judges now jig WS chucking power feedback whether >=7KN and lasting 50ms, if condition meets, is directly switch to jig WS pressure automatic control AFC control mode, and jig DS remains unchanged; Otherwise jig DS, jig WS carry out three short strokes and set: three short strokes are set opening degree=secondary and set strip width/2.Jig DS carries out three short strokes always and sets, until three short strokes are complete; And jig WS continues whether judge chucking power >=and 7KN and lasting 50 ms, once condition meets, jig WS abandons carrying out three short strokes settings, converts rapidly AFC control mode to; If carry out jig WS in three short stroke processes, never meet AFC control mode switching condition, the complete rear AFC control mode that directly switches to of tri-short strokes of jig WS.
Claims (1)
1. a hot rolling coiler jig thin material threading control method, comprises PLC, second computer and detects the pressure sensor of 2# hydraulic cylinder piston and cylinder bar pressure, it is characterized in that:
One group of pressure sensor is installed, is detected 1# hydraulic cylinder piston and cylinder bar pressure; In PLC, set up analog input, and revision establishment jig opening degree setting program, pressure feedback calculation procedure, strip tracking program and jig opening degree and pressure automatic control program, while being with steel between two hydraulic cylinder active regions, two pressure feedback are averaged as the actual clamping of jig plate pressure;
The concrete control procedure of jig is:
(1), jig maintains the last opening degree of setting, when first frame of finish rolling is entered steel, this piece of jig opening degree steel is set and is started, data check is errorless sends data receiver settling signal afterwards to second computer;
(2), when second frame of finish rolling entered steel, jig is carried out second computer and is set opening degree:
One-sided jig is set opening degree=(strip width+second computer is set width allowance+mono-time short stroke allowance+secondary short stroke allowance)/2;
(3), when band steel head arrives jig centre position, PLC controls jig active side and short stroke of jig transmission side starts, whether jig both sides, and continue to detect a short stroke and complete to steel plate 100 mm that advance with maximal rate, until a short stroke finishes;
(4), a short stroke is when complete, PLC carries out jig active side and jig transmission side secondary short stroke starts, whether jig both sides, and continue to detect secondary short stroke and complete to steel plate 50 mm that advance with maximal rate, until secondary short stroke finishes;
(5), after secondary short stroke completes, PLC judges now jig active side chucking power feedback is whether >=7KN and lasting 50ms, if condition meets, is directly switch to jig active side pressure automatic control AFC control mode, jig transmission side remains unchanged; Otherwise jig transmission side, jig active side are carried out three short strokes and are set: three short strokes are set opening degree=secondary and set strip width/2; Jig transmission side is carried out three short strokes always and is set, until three short strokes are complete; And jig active side continues whether judge chucking power >=and 7KN and lasting 50 ms, once condition meets, jig active side abandons carrying out three short strokes settings, converts rapidly AFC control mode to; If carry out jig active side in three short stroke processes, never meet AFC control mode switching condition, the complete rear AFC control mode that directly switches to of three short strokes of jig active side.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210559466.6A CN103008359B (en) | 2012-12-21 | 2012-12-21 | Thin material threading control method for guide rulers of hot rolling coiler |
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| CN201210559466.6A CN103008359B (en) | 2012-12-21 | 2012-12-21 | Thin material threading control method for guide rulers of hot rolling coiler |
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| CN103008359B true CN103008359B (en) | 2014-07-30 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106140825B (en) * | 2016-06-28 | 2018-06-29 | 攀钢集团攀枝花钢钒有限公司 | A kind of flipper guide control method for preventing hot-continuous-rolling strip steel from generating wedge shape |
| CN108480407B (en) * | 2018-03-16 | 2020-03-24 | 山东鲁冶瑞宝电气自动化有限公司 | Control method for short stroke of guide ruler of coiling machine |
| CN110000220B (en) * | 2019-04-09 | 2020-06-23 | 鞍钢股份有限公司 | Automatic adjusting method for coil shape of hot-rolled strip steel |
| CN111054753B (en) * | 2019-11-29 | 2021-09-03 | 首钢智新迁安电磁材料有限公司 | Strip steel head threading control method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2424615C2 (en) * | 1974-05-21 | 1982-12-16 | Vereinigte Flugtechnische Werke Gmbh, 2800 Bremen | Circuit arrangement for a roll gap control device |
| JPH03264110A (en) * | 1990-03-12 | 1991-11-25 | Ishikawajima Harima Heavy Ind Co Ltd | Method for controlling side guides |
| JPH0669582B2 (en) * | 1990-10-23 | 1994-09-07 | 石川島播磨重工業株式会社 | Side guide control method |
| JP2006263779A (en) * | 2005-03-24 | 2006-10-05 | Jfe Steel Kk | Side guide control method for hot rolling apparatus |
| CN101585055B (en) * | 2008-05-22 | 2011-04-20 | 上海梅山钢铁股份有限公司 | Coiling side guide plate control method capable of memorizing optimized operation behavior |
| CN102632084A (en) * | 2012-04-28 | 2012-08-15 | 山西太钢不锈钢股份有限公司 | Method for controlling head tower of stainless steel hot-rolled coil |
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