CN104942031B - A kind of cold rolling lubricant supplying method - Google Patents
A kind of cold rolling lubricant supplying method Download PDFInfo
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- CN104942031B CN104942031B CN201410116525.1A CN201410116525A CN104942031B CN 104942031 B CN104942031 B CN 104942031B CN 201410116525 A CN201410116525 A CN 201410116525A CN 104942031 B CN104942031 B CN 104942031B
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Abstract
The invention discloses a kind of cold rolling lubricant supplying method, it includes：Lubricating fluid is sent into nozzle using pressure-feed mode, simultaneously also it is passed through in nozzle using the compressed gas of certain pressure, cold-rolling lubricant is crushed in nozzle with the disturbance and souring of gas, and the cold-rolling lubricant liquid particles to form 20 80 μm are sprayed, it is injected into the roll gap area of the belt steel surface of cold rolling frame entrance side and/or strip and roll.Cold rolling lubricant supplying method of the present invention is avoided that the dirt plug nozzle passages such as the greasy filth group of friction iron powder and ROLLING OIL generation；More significantly lift the cooling effect of cold mill complex；When lubricant pressure changes, the spray characteristics of lubricant are relatively efficiently maintained by the pressure energy for adjusting compressed air；Prevent from causing the not good situation of plate shape because cold-rolling lubricant flow distribution is uneven in belt steel surface appearance.
Description
Technical field
The present invention relates to a kind of supply method of operation of rolling lubricant, more particularly to a kind of rolling for cold-rolling mill production
The supply method of process lubricant processed.
Background technology
The actual load of the cold-rolled process of steel is very high, and the pressure in usual deformed area may be up to 2500-3000MPa, together
When, the strip in deformed area can produce amount of heat, therefore, in order to reduce rolling load, in production can using ROLLING OIL or
Emulsion is lubricated and cools down strip and roll.As shown in figure 1, emulsion or ROLLING OIL are sprayed at the He of roll 2 by nozzle 1
The surface of strip 3, and one layer of oil reservoir 4 is formed on the surface of strip 3, to play a part of to lubricate and cool down.In the operation of rolling, emulsification
The usage amount of liquid and ROLLING OIL is very big, so needing to be purified after reclaiming used lubricant using circulation and stress method
Process and put into recycling.
It is cold rolling that lubricant is with lubricator sprayed by pressure type fan nozzle in actual production process.Fig. 2 shows existing
There is the overall structure of the pressure segment nozzle in technology.Fig. 3 shows the structure of the circulation passage of the nozzle shown in Fig. 2.Fig. 4 shows
The export structure of the circulation passage shown in Fig. 3 is shown.As shown in Fig. 2, Fig. 3 and Fig. 4, one is offered along the axial direction of nozzle 5
Bar circulation passage 6, the oval in shape of outlet 7 of the circulation passage 6, lubricant flows through circulation passage in the presence of certain pressure
After being ejected from outlet 7 after 6, in spatial dispersion, the lubricant for ejecting is in integrally flat fan to be dispersed into droplet one by one.
Fig. 5 shows the structure of the spraying system for being installed on cold mill complex scene.Fig. 6 is then shown using shown in Fig. 5
The flow of lubricant of belt steel surface during spraying system and the relation schematic diagram of strip position.As shown in figure 5, the spraying system 8
Including several fan nozzles 9, multiple nozzles 9 incline staggered, and lubricant that each nozzle 9 is ejected is not general mutual
Collision so that the lubricant of ejection forms the uniform lubricant distribution of a laminar flow amount in the spatial dimension along strip width
Layer.As shown in fig. 6, the injection flow of lubricant is an essentially lineal layout on strip width direction, show that lubricant exists
Flow on strip width direction is uniform, so ensure that strip and roll cooling effect and lubricant effect it is equal
One property and be unlikely to the local uneven effect of cold and hot or lubrication occur.
But can there are problems that using above-mentioned cold-rolling lubricant spray regime, predominantly：
1）Due to can constantly produce friction iron powder in cold-rolled process, together with greasy filth reunion that it can be formed with ROLLING OIL,
Consequently, it is possible to causing the situation of the circulation passage in plug nozzle；
2）In cold-rolled process, if changing the injection pressure of the nozzle under use state, the jet angle of lubricant
Degree and injection sector will change, and can also be changed with the flow of lubricant for causing nozzle to spray, when multiple nozzles
Flow causes the inlet zone of strip and roll flow distribution inequality occur after overlapping, so as to ultimately result in steel-plate shape defect；
3）Fineness of dispersion of the lubricant that drive nozzle is sprayed in space is 100-200 μm or so, particularly with emphasizing
For the cold rolling process of cooling effect, because fineness of dispersion is excessive, its cooling effect can not produce a desired effect.
Drive nozzle usually there will be above mentioned problem in cold-rolling process, and nozzle is hidden in setting when being produced due to milling train
It is standby internal, therefore, there is above mentioned problem staff and be difficult to be investigated and repaired.
Publication No. CN101060940A, publication date is on June 27th, 2007, entitled " to ensure the tandem rolling course of sheet metal very much
The Chinese patent literature of the emulsion injection method of middle strip stabilization " is related to a kind of emulsion injection method, it is ensured that very thin plate connects
The emulsion injection method of strip stabilization during rolling, it is comprised the following steps：Working roll roll gap lubrication spray beam A is arranged in machine
Frame entrance side, respectively to the roll gap area injection emulsion of bottom working roll and top working roll, emulsion uses 0.3~0.4Mpa low pressure
Power is sprayed；Working roll is cooled down and cleaning spray beam B is arranged in rack outlet side, respectively to top working roll and the roll surface of bottom working roll
Injection emulsion, emulsion injection pressure is 0.5~0.7Mpa；Intermediate calender rolls and backing roll cooling and cleaning spray beam D are arranged in
Rack outlet side, emulsion injection pressure is 0.8~0.9Mpa；Strip is cooled down and cleaning spray beam C is arranged in rack outlet side,
The upper and lower surface to strip sprays emulsion respectively, and emulsion is sprayed using 0.3~0.4Mpa low-pressures.
Notification number is CN202877237U, and the day for announcing is on April 17th, 2013, a kind of entitled " rolling mill emulsion spray
The Chinese patent literature of mouth " discloses a kind of Emulsified liquid nozzle for milling train, and it includes spray beam and nozzle, and nozzle is fixed on
In spray beam, nozzle is provided with cavity, and the afterbody of cavity is provided with columned connection end, and the head of cavity is provided with flat horn-like penetrate
Outlet, connection end is provided with internal thread, and nozzle arrangement is located at spray beam side.
Publication No. CN101060940A, publication date is on October 24th, 2007, entitled " the lubricating oil supply in cold rolling
The Chinese patent literature of method " is related to the method for supplying lubricant in a kind of cold-rolled process, and the method for supplying lubricant is each
Rolling support feed side is mixed with a kind of emulsion lubrication oil of the defined of ROLLING OIL and water by nozzle supply, so as to enter row metal
Method for supplying lubricant in rolling lubrication, cold rolling during the tandem of plate is cold rolling, it includes：While determining or presumption lubrication
Pressure (lubricating nozzle pressure) in nozzle pipe arrangement, and Stress control is carried out for the emulsion lubrication oil of above-mentioned defined, with
So that become to be susceptible to lubricating nozzle pressure at least more than the 0.5Mpa of lubricated many rolling supports, while to the support
Roll be rolled into area's entrance and directly spray, supply above-mentioned lubricating oil.
In sum, in cold continuous rolling production process, above-mentioned technical proposal remains unchanged and is confined to simple pressure injection side
In the improvement of formula, it is merely capable of solving the problems, such as the production of the single aspects such as steady production, anti-blocking or skidding, and use above-mentioned skill
The cost input of total system can be improved after art scheme and is difficult to be fully solved problem proposed by the present invention.
The content of the invention
It is an object of the invention to provide a kind of supply method of cold rolling lubricant, using the cold rolling lubricant
Supply method can be significantly increased the cooling effect of cold mill complex, it is to avoid the blocking of lubricant nozzle passage, and one
Determine effectively maintain the uniform spray characteristics of flow of lubricant in the case that range pressure changes.
To achieve these goals, the present invention proposes a kind of cold rolling lubricant supplying method, and it includes：Using pressure
The mode of power conveying sends into nozzle cold rolling lubricant and compressed gas, using compressed gas to cold rolling lubricant
Crushed, so that particle of the cold rolling lubricant ejected from nozzle for 20-80 μm.
Sprayed different from the fluid pressure formula that prior art is used, technical scheme uses two-fluid gas
Liquid formula spray, i.e., in addition to lubricant simply is delivered into nozzle with fluid pressure, mainly by compressed gas send into nozzle in
After cold rolling lubricant is sufficiently mixed, and a certain degree of broken, then compressed gas is carried out to cold-rolling lubricant in nozzle
Body entrained lubricant liquid injection delivery nozzle is obtaining the process of final 20-80 μm of smaller liquid particles, this liquid particles
The two phase fluid mixed with a small amount of compressed gas is ejected.
Compared with the liquid particles granularity (about 100-200 μm) using the cold-rolling lubricant obtained by prior art,
By the liquid particles granularity that technical scheme is obtained is smaller, it has preferably cooling effect under equal flow
Really, can adapt in the cold mill complex scene for emphasizing cooling effect.Simultaneously as compressed gas are there are in nozzle, therefore,
Even if the liquid conveying pressure of cold-rolling lubricant occurs abrupt change, the pressure that can accordingly adjust compressed gas causes to be sprayed from nozzle
The characteristic variations of the lubricant mist of injection will not be very big.
In addition, compressed gas wash away the passage for lubricant conveying circulation in nozzle all the time, it is to avoid iron powder or ROLLING OIL
The situation of the dirty plug nozzle spout such as greasy filth, so as to reduce the possibility that cold-rolling lubricant supply arrangement breaks down.
Further, in cold rolling lubricant supplying method of the present invention, cold rolling lubricant is injected
To the roll gap area of belt steel surface and/or strip with roll of cold rolling frame entrance side.
Further, in cold rolling lubricant supplying method of the present invention, can also go out to cold rolling frame simultaneously
The belt steel surface and/or strip of mouth side and spray cooling liquid in the roll gap area of roll, preferably to reduce the temperature of roll and strip
Degree.
Further, above-mentioned coolant can be using the one of which in emulsion, pure water or ROLLING OIL.
Further, the injection pressure of above-mentioned coolant is 5.0-9.0bar.
Further, on strip unit width, the emitted dose of above-mentioned coolant is no less than 1.5m3/(m·min)。
Further, in cold rolling lubricant supplying method of the present invention, above-mentioned cold-rolling lubricant can be adopted
With emulsion or ROLLING OIL.
Further, in cold rolling lubricant supplying method of the present invention, when cold rolling lubricant is sprayed
When being incident upon the belt steel surface to cold rolling frame entrance side, and the cold rolling lubricant for emulsion, nozzle center's extension line
Contact point distance with strip is 0.5-2.0m apart from H positioned at the frame working roll center line at its rear.
Preferably, above-mentioned H is 1.0-1.5m.
Further, in cold rolling lubricant supplying method of the present invention, above-mentioned cold rolling lubricant
Temperature is more than 30 DEG C.
Further, in cold rolling lubricant supplying method of the present invention, cold rolling profit on unit width
The emitted dose Q of lubrication prescriptionvFor：
QV=k1vs 2.2Dr 0.5
Wherein, when cold rolling lubricant is ROLLING OIL, k1Value is 5.5 × 10-5~8.0 × 10-6；Work as cold rolling
When lubricant is emulsion, k1Value is 1.33 × 10-4~5.3 × 10-5Between；vsIt is strip speed, unit is ms-1；Dr
It is work roll diameter, unit is m.
Further, in cold rolling lubricant supplying method of the present invention, lubricating fluid injection pressure is
0.5-8.0bar。
Further, in cold rolling lubricant supplying method of the present invention, the supply pressure of the compressed gas
Power is the 30%-150% that now lubricant sprays pressure.
Further, in cold rolling lubricant supplying method of the present invention, cold rolling lubricant is injected
To the belt steel surface of cold rolling frame entrance side, injection direction is vertical with the direction of travel of strip.
Cold-rolling oil supply method of the present invention sprays as a result of two-fluid gas liquid type, and it is excellent that it possesses
Put and be：
1）It is avoided that the dirt plug nozzle passages such as the greasy filth group of friction iron powder and ROLLING OIL generation；
2）More significantly lift the cooling effect of cold mill complex；
3）When lubricant pressure changes, the spray characteristics of lubricant can be effectively maintained；
4）Prevent from causing the not good situation of plate shape because cold-rolling lubricant flow distribution is uneven in belt steel surface appearance.
Brief description of the drawings
Fig. 1 is the schematic diagram that emulsion or ROLLING OIL are sprayed on belt steel surface using prior art.
Fig. 2 is the overall structure diagram of pressure segment nozzle of the prior art.
Fig. 3 is the structural representation of the circulation passage of the nozzle shown in Fig. 2.
Fig. 4 is the export structure schematic diagram of the circulation passage shown in Fig. 3.
Fig. 5 is the structural representation of the spraying system for being installed on cold mill complex scene.
The flow Q and strip position X of the lubricant P of belt steel surface when Fig. 6 is using spraying system as shown in Figure 5
Relation schematic diagram.
Fig. 7 is the spraying system for realizing cold rolling lubricant supplying method of the present invention under a kind of implementation method
Structural representation.
Fig. 8 is the spraying system for realizing cold rolling lubricant supplying method of the present invention in another embodiment
Down located at one when the structural representation of the nozzle of forebay.
Fig. 9 is one group of structural representation of nozzle shown in Fig. 8.
Specific embodiment
Below will be according to specific embodiment and Figure of description to cold rolling lubricant supplying method of the present invention
Be described further, but specific examples below and its related description do not constitute it is improper for technical scheme
Limit.
Embodiment A1-A5
Fig. 7 shows the spraying system for realizing cold rolling lubricant supplying method of the present invention in a kind of embodiment party
Structure under formula.
As shown in fig. 7, the cold mill complex is with 5 cold rolling production units of frame, wherein 1#~4# frames are by one
Emulsion box sprays cold-rolling lubricant by nozzle 13 via nozzle group valve station 11 to 1#~4# frames, and 5# frames are then by another breast
Change liquid case and cold-rolling lubricant is sprayed to 5# frames by nozzle 14 via nozzle group valve station 12；Divide under 1#~4# frames and 5# frames
It is not provided with collecting tank 15,16 to be used for gathering used cold-rolling lubricant, so that repetitive cycling utilizes cold-rolling lubricant.
Before the 1# frames of milling train, the cold rolling rolling lubricant injection system of a set of two-fluid is set according to description of the invention
System.
With continued reference to Fig. 7, in actual production process, the cold rolling lubricant for being applied to above-mentioned cold rolling production unit is supplied
Include to method：
Cold rolling lubricant is transported in the nozzle 18 before milling train 1# frames by pipeline, while sending into compressed gas
P, compressed gas P is crushed to cold rolling lubricant, so that the cold rolling lubricant ejected from nozzle 18 is 20-80
μm particle, cold rolling lubricant is ejected into the surface of strip 10 of cold rolling frame entrance side.The wherein supply of compressed gas
Pressure is the 30%-150% that now lubricant sprays pressure；The temperature of the cold rolling lubricant of injection is more than 30 DEG C, injection
Pressure is 0.5-8.0bar；Emitted dose Q of the cold rolling lubricant on the surface unit width of strip 10vMeet below equation：
QV=k1vs 2.2Dr 0.5
Wherein, cold-rolling lubricant is ROLLING OIL, k1Take 5.5 × 10-5To 8.0 × 10-6Between, vsIt is strip speed, it is single
Position is ms-1；DrIt is work roll diameter, unit is m.
Relevant parameter in above-mentioned cold-rolling oil supply method refers to table 1, on cold rolling lubricant in strip table
Emitted dose Q on the unit width of facevRelevant parameter refer to table 2.
Table 1.
Table 2.
Fig. 8 shows the spraying system for realizing cold-rolling oil supply method of the present invention in another embodiment
Down located at one when the nozzle arrangements of forebay.
As shown in figure 8, nozzle 21 and nozzle 22 are provided with the upper and lower surface of cold rolling frame entrance side A strips, its use
To spray cold rolling lubricant, and the He of nozzle 23 is respectively equipped with the upper and lower surface of cold rolling frame outlet side B strips
Nozzle 24, it is used for spray cooling liquid, to cool down finished strip and roll.
With continued reference to Fig. 8, in actual production process, the cold rolling profit of the cold rolling production unit being applied to shown in Fig. 8
Lubrication prescription supply method, compared with above-mentioned cold-rolling oil supply method, in step 1)~3) on the basis of, it also includes：
To spray cooling liquid in the belt steel surface and/or strip 20 of cold rolling frame outlet side B and the roll gap area of roll 25, its
The injection pressure of middle coolant is 5.0-9.0bar, emitted dose Q >=1.5m3/ (mmin), particularly relevant parameter is referred to table
3。
In addition, above-mentioned coolant can be using the one of which in emulsion, pure water or ROLLING OIL.
Table 3 shows the relevant parameter of spray cooling liquid in cold-rolling oil supply method.
Table 3.
| Injection pressure (bar) | Emitted dose [m3/(m·min)] |
| A1 | 6 | 2.0 |
| A2 | 6 | 1.7 |
| A3 | 6 | 2.1 |
| A4 | 8 | 2.3 |
| A5 | 8 | 2.3 |
Fig. 9 shows one group of mounting structure of nozzle in Fig. 8.
As shown in figure 9, this group of nozzle 21 is arranged at cold rolling frame porch, the upper and lower surface that it is vertical at strip 20 it
On, the contact point R of the center extension line of nozzle 21 and strip distance be located between the frame working roll center line at its rear away from
From being H.
When cold rolling lubricant is emulsion, the span of H is 0.5-2.0m；Preferably, can be by the value of H
Scope is set to 1.0-1.5m.
With continued reference to Fig. 9, said nozzle is vertically disposed at the upper and lower surface of strip 20, so when cold-rolling lubricant quilt
Spray to cold rolling frame entrance side belt steel surface when, its injection direction it is vertical with the direction of travel of strip with formation sector it is cold
Roll the spray regime S of lubricant.
It should be noted that being adopted by the outlet temperature ratio of the coil of strip after cold-rolling oil supply method of the invention treatment
The temperature of the coil of strip after being processed with prior art will reduce 5-10 DEG C, greatly increase the cooling effect of cold mill complex, so that
Effectively improve the surface quality of production strip.Meanwhile, the equipment for realizing technical scheme is ripe, installs facility,
Input cost is low.
Additionally, compared to prior art is taken, because the compressed gas in technical scheme constantly wash away nozzle
Spout, therefore, blockage problem of the nozzle under various common operating modes will not occur, improve the stable of spraying system
Property.
It should be noted that listed above is only specific embodiment of the invention, it is clear that real the invention is not restricted to more than
Example is applied, there is the similar change of many therewith.If those skilled in the art directly derived from present disclosure or
The all deformations associated, all should belong to protection scope of the present invention.
Claims (11)
1. a kind of cold rolling lubricant supplying method, it is characterised in that：Cold rolling is lubricated using pressure-feed mode
In agent and compressed gas feeding nozzle, cold rolling lubricant is crushed using compressed gas, so as to be ejected from nozzle
Cold rolling lubricant be 20-80 μm of particle；Wherein injection pressure is 0.5-8.0bar, the supply pressure of the compressed gas
Power is the 30%-150% that now lubricant sprays pressure；Wherein, on unit width cold rolling lubricant emitted dose QvFor：
QV=k1vs 2.2Dr 0.5
Wherein, when cold rolling lubricant is ROLLING OIL, k1Value is 5.5 × 10-5~8.0 × 10-6；When cold rolling lubrication
When agent is emulsion, k1Value is 1.33 × 10-4~5.3 × 10-5Between；vsIt is strip speed, unit is ms-1；DrIt is work
Make roller diameter, unit is m.
2. cold rolling lubricant supplying method as claimed in claim 1, it is characterised in that：Cold rolling lubricant is injected
To the roll gap area of belt steel surface and/or strip with roll of cold rolling frame entrance side.
3. cold rolling lubricant supplying method as claimed in claim 1, it is characterised in that：To the band of cold rolling frame outlet side
Steel surface and/or strip and spray cooling liquid in the roll gap area of roll.
4. cold rolling lubricant supplying method as claimed in claim 3, it is characterised in that the coolant be emulsion,
Pure water or ROLLING OIL.
5. cold rolling lubricant supplying method as claimed in claim 3, it is characterised in that the injection pressure of the coolant
It is 5.0-9.0bar.
6. cold rolling lubricant supplying method as claimed in claim 3, it is characterised in that on strip unit width, institute
The emitted dose for stating coolant is no less than 1.5m3/(m·min)。
7. cold rolling lubricant supplying method as claimed in claim 1, it is characterised in that the cold rolling lubricant is
Emulsion or ROLLING OIL.
8. cold rolling lubricant supplying method as claimed in claim 7, it is characterised in that when cold rolling lubricant is sprayed
When being incident upon the belt steel surface to cold rolling frame entrance side, and the cold rolling lubricant for emulsion, nozzle center's extension line
Contact point distance with strip is 0.5-2.0m apart from H positioned at the frame working roll center line at its rear.
9. cold rolling lubricant supplying method as claimed in claim 8, it is characterised in that H is 1.0-1.5m.
10. cold rolling lubricant supplying method as claimed in claim 1, it is characterised in that the cold rolling lubricant
Temperature be more than 30 DEG C.
11. cold rolling lubricant supplying methods as claimed in claim 1, it is characterised in that cold rolling lubricant is sprayed
The belt steel surface of cold rolling frame entrance side is incident upon, injection direction is vertical with the direction of travel of strip.
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| CN201410116525.1A CN104942031B (en) | 2014-03-26 | 2014-03-26 | A kind of cold rolling lubricant supplying method |
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| CN201410116525.1A CN104942031B (en) | 2014-03-26 | 2014-03-26 | A kind of cold rolling lubricant supplying method |
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| CN104942031B true CN104942031B (en) | 2017-05-31 |
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| CN110193517B (en) * | 2018-02-27 | 2020-11-17 | 宝山钢铁股份有限公司 | Lubricating device for hot rolling vertical roll |
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| JPS585731B2 (en) * | 1979-09-12 | 1983-02-01 | 川崎製鉄株式会社 | Lubricating method in cold rolling mill |
| DE10352546A1 (en) * | 2003-09-04 | 2005-03-31 | Sms Demag Ag | Method and device for applying an adjustable tensile stress distribution, in particular in the edge regions of cold-rolled metal strips |
| DE102004040375A1 (en) * | 2004-06-09 | 2005-12-29 | Sms Demag Ag | Method and rolling stand for cold rolling of metallic rolling stock, in particular of rolled strip, with nozzles for gaseous or liquid treatment media |
| BE1017806A3 (en) * | 2007-10-08 | 2009-07-07 | Ct Rech Metallurgiques Asbl | ATOMIZATION LUBRICATION SYSTEM AND METHOD FOR ROLLING CYLINDERS. |
| CN101396694A (en) * | 2008-10-31 | 2009-04-01 | 莱芜钢铁股份有限公司 | Roller aerosol cooling method and device |
| CN201950080U (en) * | 2010-12-14 | 2011-08-31 | 永鑫精密材料（无锡）有限公司 | Technical lubricating device for stainless steel strips in bending and straightening |
| EP2465619A1 (en) * | 2010-12-16 | 2012-06-20 | Siemens VAI Metals Technologies GmbH | Method and device for applying a lubricant when milling a metallic milling product |
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