CN102513386A - Emulsion spraying method and emulsion spraying system for producing steel types with yield strength higher than 400MPa - Google Patents
Emulsion spraying method and emulsion spraying system for producing steel types with yield strength higher than 400MPa Download PDFInfo
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- CN102513386A CN102513386A CN2011104551264A CN201110455126A CN102513386A CN 102513386 A CN102513386 A CN 102513386A CN 2011104551264 A CN2011104551264 A CN 2011104551264A CN 201110455126 A CN201110455126 A CN 201110455126A CN 102513386 A CN102513386 A CN 102513386A
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Abstract
An emulsion spraying method and an emulsion spraying system for producing steel types with yield strength higher than 400MPa. The method includes the steps of arranging spraying beams on intermediate rolls and working rolls on inlet sides and working rolls on outlet sides of all frames of a five-frame cold continuous rolling unit, arranging spraying beams among the frames, arranging a fine cooling spraying beam at an outlet of the fifth frame, and arranging spraying beams on surfaces of the working rolls of the third frame and the fourth frame; arranging a plurality of nozzles on the spraying beams; enabling the nozzles of the spraying beams on the intermediate rolls and the working rolls on the inlet sides of the frames to spray emulsion to roll seam areas on the inlet sides of the upper working rolls and the lower working rolls respectively; enabling the nozzles of the spraying beams on the intermediate rolls and the working rolls on the inlet sides of the frames to spray emulsion to roll seam areas of upper support rolls and lower support rolls respectively; enabling the nozzles of the spraying beams on the working rolls on the outlet sides of the frames to spray emulsion to roll seam areas on the inlet sides of the upper working rolls and the lower working rolls respectively; and enabling the nozzles of the spraying beams arranged on the surfaces of the working rolls of the third frame and the fourth frame to spray emulsion. The method eliminates frame vibration during rolling of a cold continuous rolling mill, and realizes normal and stable production of high-strength steel types in the cold continuous rolling unit.
Description
Technical field
The present invention relates to the pickling rolling technique, relate in particular to a kind of emulsion injection method and system that the above steel grade of yield strength 400MPa is produced that be used for.
Background technology
In recent years, along with the fast development of household electrical appliance industry and motor industry, to the also constantly increase of demand of silicon steel product.And the cold rolling non-orientation silicon steel product more and more receives the favor in market owing to its high magnetic strength, low iron loss, has replaced the main raw material(s) that hot rolled silicon steel sheet becomes electromechanics trade at present.The low grade silicon steel product of cold rolling non-orientation is general at present to adopt tandem mill to be rolled; And the non-oriented high grade silicon steel product is because its material behavior, and silicon, aluminium content are higher, and its yield strength is all more than 400MPa; Some high grade silicon steel even surpass 800MPa; If adopt the tandem mill production of big roller footpath that the rolling mill vibration phenomenon very easily takes place, and then influence product quality or cause broken belt heap steel accident, so generally adopt 20 roller singlestandmills to be rolled this series products.But the relative tandem mill of the production efficiency of singlestandmill has obvious gap, and manufacturing cost is far above the tandem rolling unit, so the cold continuous rolling fixture of like product has the stronger market competitiveness under the equal conditions.
There is following problem in prior art:
To the product more than the yield strength 400MPa,,, influence production stability and product quality because its material behavior and high resistance of deformation are prone in the operation of rolling rolling mill vibration phenomenon take place and then cause the broken belt accident if adopt cold continuous rolling to be rolled.
If adopt single chassis 20 roller mills to be rolled, then production cost is higher and production efficiency is low.
Summary of the invention
The object of the present invention is to provide a kind of emulsion injection method and system that the above steel grade of yield strength 400MPa is produced that be used for; Associated materials characteristic and rolling characteristic to high strength cold-rolled product; To eliminate the frame vibration phenomenon in the cold continuous rolling operation of rolling, realize the normal and stable production of high-strength products in tandem mills.
For achieving the above object, technical scheme of the present invention is:
A kind of emulsion injection method that is used for the above steel grade production of yield strength 400MPa; Each frame entrance side intermediate calender rolls, working roll and outlet side working roll in five frame tandem mills are provided with the spray beam; The spray beam is set between each frame; The 5th frame exit is provided with meticulous cooling spray beam, and corresponding the 3rd, 4 frame working roll roll surfaces are provided with the spray beam; The spray beam is provided with plurality of nozzles; Nozzle on the said meticulous cooling spray beam divides some groups along the working roll width, and each organizes nozzle can spray control separately;
Wherein, each frame entrance side intermediate calender rolls, working roll spray beam nozzle are respectively to the entrance side roll gap area spray emulsion of upper working rolls and lower working rolls, and emulsion adopts 0.4～0.6MPa low-pressure to spray;
To the roll gap area spray emulsion of backing roll up and down, emulsion adopts 0.7～0.9MPa high pressure to spray to each frame entrance side intermediate calender rolls, working roll spray beam nozzle respectively;
Each frame outlet side working roll spray beam nozzle is respectively to the outlet side roll gap area spray emulsion of upper working rolls and lower working rolls, and emulsion adopts 0.7～0.9MPa high pressure to spray;
The spray beam nozzle ejection emulsion that corresponding the 3rd, 4 frame working roll roll surfaces are provided with, emulsion adopt 0.2～0.4MPa low-pressure to spray.
Further, on the spray beam between each nozzle spacing be 25～50mm.
Again, the spray beam that band steel between frame is sprayed is set between described each frame, emulsion adopts 0.4～0.6MPa pressure injection.
When adopting tandem mill to produce high-strength products, one of difficult problem that at first need solve is exactly a rolling mill vibration.And the principal element that influences rolling mill vibration comprises the thickness of sheet material, the stability of ROLLING OIL, the work-hardening capacity of stocking etc.This is wherein obvious to its influence that causes with rolling lubrication again, can think like this that the lubricated and oil film thickness of reasonable technology is a rolling mill vibration key of problem when solving high-strength products production.
Each frame entrance side working roll spray beam is respectively to the entrance side roll gap area spray emulsion of upper working rolls and lower working rolls, on the spray beam between each nozzle spacing be 25～50mm, emulsion adopts 0.4～0.6MPa low-pressure to spray.The purpose that entrance side working roll roll gap zone adopts low-pressure to spray is, lower expulsion pressure helps the even distribution of oil film, makes the deformation condition of rolled piece more stable, to stablizing tension force and roll-force has booster action.
Each frame entrance side intermediate calender rolls is provided with the spray beam respectively to the roll gap area spray emulsion of backing roll up and down; On the spray beam between each nozzle spacing be 25～50mm; Emulsion adopts 0.7～0.9MPa high pressure to spray; Through the high-pressure injection here, sponge the distortion heat of a part of working roll, intermediate calender rolls, keep the stable of roll surface convexity.
Each frame outlet side working roll is provided with the spray beam respectively to the outlet side roll gap area spray emulsion of upper working rolls and lower working rolls, on the spray beam between each nozzle spacing be 25～50mm, emulsion adopts 0.7～0.9MPa high pressure to spray.Here adopt the reason of high-pressure injection to be, high grade silicon steel produces higher distortion heat in deformation process, utilizes increase emulsion flow to come breaker roll to cool off, and stablizes the plate shape of rolled piece.
At the 3rd, 4 frame entrance sides, arranged working roll roll surface spray beam in addition, on the spray beam between each nozzle spacing be 25～50mm, emulsion adopts 0.2～0.4MPa low-pressure to spray.Mention in the introduction in front, the key that solves vibration problem is to make being evenly distributed of emulsion oil film, and keeps the relatively stable of roll surface convexity.Because entrance side working roll spray beam is the roll gap district that is directly injected to working roll, adopts the low-pressure injection to help oil film and evenly distribute.But can cause the roller temperature problem faster that rises thus.And the 3rd, 4 frames are in rolled piece work hardening visibility point the most; The temperature of roll rises the most obvious; Therefore in the entrance side specific placement of the 3rd frame, 4 frames roll surface cooling spray beam; To the roll surface direct injection, cooling off roll stablizes convexity on the one hand, also helps on the other hand oil film is remained on rational thickness with low-pressure, low discharge emulsion.
Spray beam between other each frame, band steel between frame is sprayed emulsion, emulsion adopts 0.4～0.6MPa pressure injection.
The 5th frame exports meticulous cooling spray beam as the auxiliary usefulness of plate shape, does not relate to the vibration problem in the operation of rolling, carries out corresponding pressure setting according to actual plate shape.
Beneficial effect of the present invention
The present invention is directed to the associated materials characteristic and the rolling characteristic of the above steel grade of yield strength 400MPa; Designed a kind of be applicable to high-yield strength band cold continuous rolling process the emulsion spray technology; Eliminated the frame vibration phenomenon of high-strength products in the cold continuous rolling operation of rolling; Can realize being used for of the normal and stable production of the above steel grade of yield strength 400MPa, significantly improve the production efficiency and the lumber recovery level of Related product at cold continuous rolling.
Description of drawings
Fig. 1 is the sketch map of the embodiment of the invention.
The specific embodiment
Referring to Fig. 1; A kind of emulsion injection method that the above steel grade of yield strength 400MPa is produced that is used for of the present invention; Each frame 1#～5# entrance side intermediate calender rolls in five frame tandem mills is provided with spray beam ETM and EBM; Entrance side working roll spray beam ETW and EBW and outlet side working roll are provided with spray beam DT and DB, and the 5th frame 5# exit is provided with meticulous cooling spray beam 5SP, and corresponding the 3rd, 4 frame working roll roll surfaces are provided with the spray beam; The spray beam is provided with plurality of nozzles; Nozzle on the said meticulous cooling spray beam divides some groups along the working roll width, and each organizes nozzle can spray control separately; Corresponding the 3rd, 4 frame 3#, 4# working roll roll surface are provided with spray beam TW and BW; Be provided with plurality of nozzles on the above-mentioned spray beam;
Wherein, each frame entrance side intermediate calender rolls, working roll spray beam nozzle are respectively to the entrance side roll gap area spray emulsion of upper working rolls and lower working rolls, and emulsion adopts 0.4～0.6MPa low-pressure to spray;
To the roll gap area spray emulsion of backing roll up and down, emulsion adopts 0.7～0.9MPa high pressure to spray to each frame entrance side intermediate calender rolls, working roll spray beam nozzle respectively;
Each frame outlet side working roll spray beam nozzle is respectively to the outlet side roll gap area spray emulsion of upper working rolls and lower working rolls, and emulsion adopts 0.7～0.9MPa high pressure to spray;
The spray beam nozzle ejection emulsion that corresponding the 3rd, 4 frame working roll roll surfaces are provided with, emulsion adopt 0.2～0.4MPa low-pressure to spray;
Further, on the spray beam between each nozzle spacing be 25～50mm.
Again, spray beam MT and MB that band steel between frame is sprayed are set between described each frame, emulsion adopts 0.4～0.6MPa pressure injection.
The 5th frame exports meticulous cooling spray beam 5SP all as the auxiliary usefulness of plate shape, does not relate to the vibration problem in the operation of rolling, and it carries out corresponding pressure setting according to actual plate shape and respectively organizes nozzle ejection.
Below in conjunction with embodiment the present invention is further specified:
Embodiment one:
Each frame spray beam ETW and EBW be respectively to the entrance side roll gap area spray emulsion of upper working rolls and lower working rolls, on the spray beam between each nozzle spacing be 30mm, emulsion adopts the injection of 0.45MPa low-pressure.
Each frame spray beam ETM and EBM be respectively to the roll gap area spray emulsion of backing roll up and down, on the spray beam between each nozzle spacing be 30mm, emulsion adopts the injection of 0.8MPa high pressure.
Each frame spray beam DT and DB be respectively to the outlet side roll gap area spray emulsion of upper working rolls and lower working rolls, on the spray beam between each nozzle spacing be 30mm, emulsion adopts the injection of 0.8MPa high pressure.
At the 3rd, 4 frame # 3,4# entrance side, arranged working roll roll surface spray beam TW and BW in addition, on the spray beam between each nozzle spacing be 30mm, emulsion adopts the 0.3MPa low-pressure to spray.
Spray beam MT and MB pressure are set at 0.5MPa between frame, and the 5th frame 5# exports meticulous cooling spray beam 5SP pressure and regulates automatically according to exit plate shape situation.
Embodiment two:
Each frame spray beam ETW and EBW be respectively to the entrance side roll gap area spray emulsion of upper working rolls and lower working rolls, on the spray beam between each nozzle spacing be 40mm, emulsion adopts the injection of 0.5MPa low-pressure.
Each frame spray beam ETM and EBM be respectively to the roll gap area spray emulsion of backing roll up and down, on the spray beam between each nozzle spacing be 40mm, emulsion adopts the injection of 0.85MPa high pressure.
Each frame spray beam DT and DB be respectively to the outlet side roll gap area spray emulsion of upper working rolls and lower working rolls, on the spray beam between each nozzle spacing be 40mm, emulsion adopts the injection of 0.85MPa high pressure.
At the 3rd, 4 frame 3#, 4# entrance side, arranged working roll roll surface spray beam TW and BW in addition, on the spray beam between each nozzle spacing be 40mm, emulsion adopts the 0.25MPa low-pressure to spray.
Spray beam MT and MB pressure are set at 0.45MPa between each frame, and the 5th frame 5# exports meticulous cooling spray beam 5SP pressure and regulates automatically according to exit plate shape situation.
Embodiment three:
Each frame spray beam ETW and EBW be respectively to the entrance side roll gap area spray emulsion of upper working rolls and lower working rolls, on the spray beam between each nozzle spacing be 45mm, emulsion adopts the injection of 0.55MPa low-pressure.
Each frame spray beam ETM and EBM be respectively to the roll gap area spray emulsion of backing roll up and down, on the spray beam between each nozzle spacing be 45mm, emulsion adopts the injection of 0.9MPa high pressure.
Each frame spray beam DT and DB be respectively to the outlet side roll gap area spray emulsion of upper working rolls and lower working rolls, on the spray beam between each nozzle spacing be 45mm, emulsion adopts the injection of 0.9MPa high pressure.
At the 3rd, 4 frame 3#, 4# entrance side, arranged working roll roll surface spray beam TW and BW in addition, on the spray beam between each nozzle spacing be 45mm, emulsion adopts the 0.4MPa low-pressure to spray.
Spray beam MT and MB pressure are set at 0.55MPa between each frame, and the 5th frame 5# exports meticulous cooling spray beam 5SP pressure and regulates automatically according to exit plate shape situation.
Emulsion injection method of the present invention; To high associated materials characteristic and rolling characteristic,, eliminated the frame vibration phenomenon of high strength steel grade in the cold continuous rolling operation of rolling through this method; The production efficiency and the product lumber recovery level of Related product have been improved; Especially under the background that at present high grade non-oriented silicon steel produce market demand constantly enlarges, can realize that high grade non-oriented silicon steel product cold continuous rolling process to the substituting of the singlestandmill operation of rolling, has broad application prospects.
Claims (5)
1. one kind is used for the emulsion injection method that the above steel grade of yield strength 400MPa is produced; Each frame entrance side intermediate calender rolls, working roll and outlet side working roll in five frame tandem mills are provided with the spray beam; The spray beam that band steel between frame is sprayed is set between each frame; The 5th frame exit is provided with meticulous cooling spray beam, and corresponding the 3rd, 4 frame working roll roll surfaces are provided with the spray beam; The spray beam is provided with plurality of nozzles; Nozzle on the said meticulous cooling spray beam divides some groups along the working roll width, and each organizes nozzle can spray control separately;
Wherein, each frame entrance side intermediate calender rolls, working roll spray beam nozzle are respectively to the entrance side roll gap area spray emulsion of upper working rolls and lower working rolls, and emulsion adopts 0.4～0.6MPa low-pressure to spray;
To the roll gap area spray emulsion of backing roll up and down, emulsion adopts 0.7～0.9MPa high pressure to spray to each frame entrance side intermediate calender rolls, working roll spray beam nozzle respectively;
Each frame outlet side working roll spray beam nozzle is respectively to the outlet side roll gap area spray emulsion of upper working rolls and lower working rolls, and emulsion adopts 0.7～0.9MPa high pressure to spray;
The spray beam nozzle ejection emulsion that corresponding the 3rd, 4 frame working roll roll surfaces are provided with, emulsion adopt 0.2～0.4MPa low-pressure to spray.
2. as claimed in claim 1ly be used for the emulsion injection method that the above steel grade of yield strength 400MPa is produced, it is characterized in that, on the spray beam between each nozzle spacing be 25～50mm.
3. the emulsion injection method that is used for the above steel grade production of yield strength 400MPa as claimed in claim 1 is characterized in that, the spray beam that band steel between frame is sprayed is set between described each frame, and emulsion adopts 0.4～0.6MPa pressure injection.
4. be used for the emulsion spraying system that the above steel grade of yield strength 400MPa is produced, it is characterized in that,
Each frame entrance side intermediate calender rolls, working roll and outlet side working roll in five frame tandem mills are provided with the spray beam; The spray beam that band steel between frame is sprayed is set between each frame; The 5th frame exit is provided with meticulous cooling spray beam, and corresponding the 3rd, 4 frame working roll roll surfaces are provided with the spray beam; The spray beam is provided with plurality of nozzles; Wherein, each frame entrance side intermediate calender rolls, working roll spray beam nozzle is respectively to the entrance side roll gap zone of upper working rolls and lower working rolls; Wherein, each frame entrance side intermediate calender rolls, working roll spray beam nozzle is respectively to the roll gap zone of backing roll up and down; Each frame outlet side working roll spray beam nozzle is regional to the outlet side roll gap of upper working rolls and lower working rolls respectively; The spray beam nozzle that corresponding the 3rd, 4 frame working roll roll surfaces are provided with.
5. as claimed in claim 4ly be used for the emulsion spraying system that the above steel grade of yield strength 400MPa is produced, it is characterized in that, on the spray beam between each nozzle spacing be 25～50mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110455126.4A CN102513386B (en) | 2011-12-30 | 2011-12-30 | Emulsion spraying method and emulsion spraying system for producing steel types with yield strength higher than 400MPa |
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| CN201110455126.4A CN102513386B (en) | 2011-12-30 | 2011-12-30 | Emulsion spraying method and emulsion spraying system for producing steel types with yield strength higher than 400MPa |
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| CN102513386A true CN102513386A (en) | 2012-06-27 |
| CN102513386B CN102513386B (en) | 2015-07-22 |
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Cited By (3)
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| CN105363811A (en) * | 2015-12-21 | 2016-03-02 | 本钢板材股份有限公司 | Cooling process method and device for strip steel among racks of pickling line tandem cold rolling mill |
| CN110695102A (en) * | 2019-10-18 | 2020-01-17 | 首钢智新迁安电磁材料有限公司 | Strip steel lubricating method |
| CN115446113A (en) * | 2022-09-28 | 2022-12-09 | 湖南宏旺新材料科技有限公司 | Cold rolling process for improving oil burning defect of surface of silicon steel plate |
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| CN115446113A (en) * | 2022-09-28 | 2022-12-09 | 湖南宏旺新材料科技有限公司 | Cold rolling process for improving oil burning defect of surface of silicon steel plate |
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