CN101024230A - Method for lubrication in heat-rolling process - Google Patents
Method for lubrication in heat-rolling process Download PDFInfo
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- CN101024230A CN101024230A CN 200610124130 CN200610124130A CN101024230A CN 101024230 A CN101024230 A CN 101024230A CN 200610124130 CN200610124130 CN 200610124130 CN 200610124130 A CN200610124130 A CN 200610124130A CN 101024230 A CN101024230 A CN 101024230A
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- support roller
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Abstract
The invention disclose a hot rolling technological lubrication method that means the roll surface of the hot mill support roll and working roll is sprayed by the oil-water mixture to lubricate. This method can reduce frame load, relieve frame libration, prolong the useful life of the support roll and working roll, increase capacity and production efficiency, improve thin and ultra-thin rolling etc.
Description
Technical field
The present invention relates to a kind of method of lubrication in heat-rolling process, particularly relate to a kind of method of bar strip continuous casting and rolling flow path lubrication in heat-rolling process.
Background technology
Conventional process flow and existing bar strip continuous casting and rolling flow path hot continuous rolling unit technological lubrication generally adopt working roll technological lubrication technology, promptly spray the roll surface of oil water mixture in working roll, lubricated roll.This technology is protected the roll surface of working roll for reducing the frame load, prolongs the rolling milimeter number of working roll, and the surface quality tool that improves the band steel has certain effect.Yet, the working roll lubrication technology is applied to rolling thin specification, higher steel grade and the material of alloy content is the roll of high-speed steel, the frame load range of decrease is less, especially for bar strip continuous casting and rolling flow path hot continuous rolling unit leading portion frame, each frame load is big, reduction ratio is big, rolling board temperature height, the working condition that roll uses is more abominable, during rolling thin specification, the working roll lubrication technology reduces that the load of frame is more not remarkable, and frame vibration is still obvious, stable rolling of considerable influence equipment life, product quality and thin specification.In addition, the working roll lubrication technology can not lubricate backing roll, and the effect in service life that prolongs backing roll is less.
Summary of the invention
The method that the purpose of this invention is to provide a kind of new lubrication in heat-rolling process, this method can reduce the frame load, and energy savings prolongs service life of backing roll and working roll, improves strip surface quality and improve thin specification ratio rolling.
Purpose of the present invention is achieved by taking following technical scheme:
A kind of method of lubrication in heat-rolling process, the roll surface that is included in the upper working rolls and lower working rolls of milling train sprays oil water mixture with lubricated working roll, and the roll surface that also is included in the backing roll up and down of milling train sprays oil water mixture with lubricated backing roll.
In the technique scheme, comprise following concrete measure:
1. oil water mixture is for containing the hot-rolling oil of certain viscosity, acid number and saponification number and the mixture of water.
2. backing roll and upper working rolls and lower working rolls are all finished the profit mixing by 1 measuring pump fuel feeding and 1 blender respectively about each frame.
3. upper support roller water discharging board is installed on frame upper outlet side, in 35～75 ° of scopes of the angle of installation and horizontal direction angle; Lower support roller water discharging board is installed on frame and is lowered to oral-lateral, and the angle of installation and backing roll are radially in 20～40 ° of scopes.
4. the nozzle that is applied to the upper support roller is installed on upper support roller water discharging board below, with upper support roller central horizontal direction ± 10 ° of interior and vertical roll surfaces of scope, nozzle distance roll surface 100～300mm; The nozzle of using the lower support roller is installed on outlet side and the at 45 and vertical roll surface of lower support roller central horizontal direction, nozzle distance roll surface 100～300mm under the frame.
5. the fuel delivery scope of backing roll is 30～800ml/min about spraying, and operating oil pressure is 2～15Bar, and work water pressure is 2～15Bar.
6. the oil water mixture injection sequential for rolling same slab is that each frame oil water mixture opening and closing is sprayed backing roll prior to working roll.
Among the present invention each frame up and down backing roll and upper working rolls and lower working rolls finish profit by 1 measuring pump and 1 blender respectively and mix, be in order to realize the separately quantitatively control of backing roll and upper working rolls and lower working rolls fuel feeding up and down, the convenient adjusting.
Among the present invention up and down the Position Design of backing roll water discharging board and installation thereof be in order to prevent that backing roll from rotating the water that carries on the roll surface and influence oil water mixture and adhere to roll surface, the water effect is cut in the position handled easily and the acquisition of water discharging board design preferably.
The spray angle of nozzle and be in order to obtain the effect that best injection and oil adhere to roll surface among the present invention apart from the distance design of roll surface.
The design of backing roll fuel delivery, operating oil pressure, work water pressure and injection sequential is in order to ensure the stable of mill control system and obtains best effect among the present invention.
Compared with prior art, the present invention has following characteristics:
1. the frame load reduces more remarkable.For bar strip continuous casting and rolling flow path, thin specification is rolling, alloy content is higher steel grade and material are the roll of high-speed steel, work on hand roller technological lubrication technology is under big fuel delivery condition, it is still less to reduce the frame load, and backing roll and working roll technological lubrication technology all, under less fuel delivery condition, the frame load reduces still remarkable.
2. alleviate the vibration of frame preferably.For bar strip continuous casting and rolling flow path, because the design feature of hot continuous rolling unit, during rolling thin specification, the serious oscillation phenomenon of leading portion frame ubiquity.Because when rolling thin specification, working roll and backing roll all technological lubrication technology reduce more significantly than work on hand roller lubrication technology frame load, and frame vibration is well alleviated, thereby improve the service life of equipment and improve the surface quality of band steel.
3. prolong the rolling milimeter number of backing roll more than 40%.Because spray oil water mixture on the roll surface of backing roll up and down, lubricated backing roll reduces the friction between backing roll and the working roll, reduce wear, thereby prolong service life of backing roll, reduce the roll change cycle, improve production capacity and production efficiency.
Description of drawings
Fig. 1 is the backing roll and the working roll technological lubrication schematic diagram of the embodiment of the invention;
Fig. 2 is that the embodiment of the invention 1 adopts all roll-force reduction schematic diagrames of the rolling boxboard 1.6mm of technological lubrication F3 frame of backing roll and working roll;
Fig. 3 is that the roll-force that adopts the rolling boxboard 1.6mm of working roll technological lubrication F3 frame separately of Comparative Examples of the present invention reduces schematic diagram.
The specific embodiment
The present invention will be described to enumerate a part of specific embodiment below, is necessary to be pointed out that at this following specific embodiment only is used for that the invention will be further described, does not represent limiting the scope of the invention.Some nonessential modifications that other people make according to the present invention and adjustment still belong to protection scope of the present invention.
The present invention specifically is implemented on bar strip continuous casting and rolling flow path hot continuous rolling unit leading portion frame, the slab thickness that adopts is 50～60mm, width of plate slab is 1000～1350mm, the slab tapping temperature is 1050～1180 ℃, belt steel thickness is 1.2～12.7mm, and the roller of backing roll directly is 1250～1350mm, and barrel length is 1500mm, the roller of working roll directly is 720～800mm, and barrel length is 1700mm.
Embodiment 1
The method of lubrication in heat-rolling process comprises the steps:
(1) selecting for use of hot-rolling oil: select a kind of hot-rolling oil, hot-rolling oil partial properties index such as the table 1 selected for use in the enforcement with certain performance indications.
The partial properties index of table 1 hot-rolling oil
| Outward appearance | Yellow transparent liquid |
| Density (g/cm 3) | 0.89 |
| Viscosity (40 ℃, mm 2) | 320 |
| Acid number (mgKOH/g) | 1 |
| Saponification number (mgKOH/g) | 40 |
| Ignition point (℃) | 214 |
(2) upper support roller water discharging board is installed on frame upper outlet side, 45 ° of the angle of installation and horizontal direction angles, and lower support roller water discharging board is installed on frame and is lowered to oral-lateral, radially 25 ° of setting angle and backing rolls.
(3) nozzle that is applied to the upper support roller is installed on upper support roller water discharging board below, is 0 ° and vertical roll surface with upper support roller central horizontal angular separation, nozzle distance roll surface 200mm; The nozzle of using the lower support roller is installed on outlet side and the at 45 and vertical roll surface of lower support roller central horizontal direction, nozzle distance roll surface 200mm under the frame.
(4) backing roll and upper working rolls and lower working rolls are all finished the profit mixing by 1 measuring pump fuel feeding and 1 blender respectively about every frame.
(5) concentration determination of profit mixing: adopt concentration tester the concentration of the oil water mixture of the oily flow of difference, discharge to be measured partial data such as the table 2 measured in the enforcement.
The concentration of the oil water mixture of the different oily flows of table 2, discharge
| Oil flow ml/min | Concentration % | |
| Working roll | Backing roll | |
| Discharge 120L/min | Discharge 75L/min | |
| 50 | 0.04 | 0.07 |
| 100 | 0.08 | 0.14 |
| 200 | 0.16 | 0.28 |
| 300 | 0.24 | 0.42 |
| 400 | 0.32 | 0.56 |
| 500 | 0.40 | 0.70 |
| 600 | 0.50 | 0.84 |
(6) fuel delivery of injection upper working rolls and lower working rolls is 200ml/min, and operating oil pressure is 6.0Bar, and work water pressure is 4.0Bar; The fuel delivery of backing roll is 200ml/min about spraying, and operating oil pressure is 7.0Bar, and work water pressure is 5.0Bar.
(7) spray sequential: when the strip frame of nipping, backing roll is lubricated to be started, strip back one frame of nipping, and working roll is lubricated to be started; Strip is 10～20 seconds before last frame is thrown steel, and backing roll is lubricated closes, and strip is thrown steel in last frame, and working roll is lubricated closes.
Embodiment 1 employing backing roll and working roll all technological lubrication compare as Fig. 2 and Fig. 3 with the roll-force reduction of the rolling boxboard 1.6mm of the roller technological lubrication F3 frame that works independently.Adopt working roll and backing roll technological lubrication, the frame load reduces significantly, adopts the working roll technological lubrication separately, and the frame load reduces less.
Embodiment 2
Relevant difference specifically comprises following aspect among embodiment 2 and the embodiment 1, and all the other are with embodiment 1:
(1) upper support roller water discharging board is installed on frame upper outlet side, and the angle of installation and horizontal direction angle are 60 °, and lower support roller water discharging board is installed on frame and is lowered to oral-lateral, and the angle of installation radially becomes 35 ° with backing roll.
(2) nozzle that is applied to the upper support roller is installed on upper support roller water discharging board below, is 5 ° and vertical roll surface with upper support roller central horizontal angular separation, nozzle distance roll surface 250mm; The nozzle of using the lower support roller is installed on outlet side and the at 45 and vertical roll surface of lower support roller central horizontal direction, nozzle distance roll surface 240mm under the frame.
(3) fuel delivery of injection upper working rolls and lower working rolls is 300ml/min, and operating oil pressure is 7.0Bar, and work water pressure is 5.0Bar; The fuel delivery of backing roll is 250ml/min about spraying, and operating oil pressure is 8.0Bar, and work water pressure is 6.0Bar.
Embodiment 2 mid frames load reduces significantly, and frame vibration is obviously alleviated, and the rolling milimeter number of working roll prolongs 33%, and the rolling milimeter number of backing roll prolongs 45%.
Claims (7)
1. the method for a lubrication in heat-rolling process, the roll surface that is included in the upper working rolls and lower working rolls of milling train sprays oil water mixture with lubricated working roll, it is characterized in that: the roll surface that also is included in the backing roll up and down of milling train sprays oil water mixture with lubricated backing roll.
2. the method for lubrication in heat-rolling process according to claim 1, it is characterized in that: oil water mixture is the mixture of hot-rolling oil and water.
3. the method for lubrication in heat-rolling process according to claim 1 is characterized in that: each frame backing roll and upper working rolls and lower working rolls is up and down all finished profit by 1 measuring pump fuel feeding and 1 blender respectively and is mixed.
4. the method for lubrication in heat-rolling process according to claim 1, it is characterized in that: upper support roller water discharging board is installed on frame upper outlet side, in 35～75 ° of scopes of the angle of installation and horizontal direction angle; Lower support roller water discharging board is installed on frame and is lowered to oral-lateral, and the angle of installation and backing roll are radially in 20～40 ° of scopes.
5. the method for lubrication in heat-rolling process according to claim 1, it is characterized in that: the nozzle that is applied to the upper support roller is installed on upper support roller water discharging board below, with upper support roller central horizontal direction ± 10 ° of interior and vertical roll surfaces of scope, nozzle distance roll surface 100～300mm; The nozzle of using the lower support roller is installed on outlet side and the at 45 and vertical roll surface of lower support roller central horizontal direction, nozzle distance roll surface 100～300mm under the frame.
6. the method for lubrication in heat-rolling process according to claim 1 is characterized in that: spray up and down that the fuel delivery scope of backing roll is 30～800ml/min, operating oil pressure is 2～15Bar, and work water pressure is 2～15Bar.
7. the method for lubrication in heat-rolling process according to claim 1 is characterized in that: spraying sequential for the oil water mixture of rolling same slab is that each frame oil water mixture opening and closing is sprayed backing roll prior to working roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610124130 CN101024230A (en) | 2006-12-08 | 2006-12-08 | Method for lubrication in heat-rolling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610124130 CN101024230A (en) | 2006-12-08 | 2006-12-08 | Method for lubrication in heat-rolling process |
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| Publication Number | Publication Date |
|---|---|
| CN101024230A true CN101024230A (en) | 2007-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610124130 Pending CN101024230A (en) | 2006-12-08 | 2006-12-08 | Method for lubrication in heat-rolling process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107030116A (en) * | 2015-12-14 | 2017-08-11 | Posco公司 | The hot-rolling method of the excellent stainless steel plate of surface quality |
| CN109351779A (en) * | 2018-11-13 | 2019-02-19 | 中冶京诚工程技术有限公司 | A kind of upper roller water discharging board and lower roll water discharging board for hot rolled thin strip operation roll of mill |
-
2006
- 2006-12-08 CN CN 200610124130 patent/CN101024230A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107030116A (en) * | 2015-12-14 | 2017-08-11 | Posco公司 | The hot-rolling method of the excellent stainless steel plate of surface quality |
| CN109351779A (en) * | 2018-11-13 | 2019-02-19 | 中冶京诚工程技术有限公司 | A kind of upper roller water discharging board and lower roll water discharging board for hot rolled thin strip operation roll of mill |
| CN109351779B (en) * | 2018-11-13 | 2024-02-06 | 中冶京诚工程技术有限公司 | Upper roll water cutting plate and lower roll water cutting plate for working roll of hot rolling thin strip rolling mill |
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Open date: 20070829 |