CN112122369B - Brushing method using multifilament brush roller - Google Patents
Brushing method using multifilament brush roller Download PDFInfo
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- CN112122369B CN112122369B CN202010755236.1A CN202010755236A CN112122369B CN 112122369 B CN112122369 B CN 112122369B CN 202010755236 A CN202010755236 A CN 202010755236A CN 112122369 B CN112122369 B CN 112122369B
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- stainless steel
- brush
- multifilament
- steel strip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
- B21B45/0278—Cleaning devices removing liquids
- B21B45/0284—Cleaning devices removing liquids removing lubricants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
- B21B45/0287—Cleaning devices removing solid particles, e.g. dust, rust
Abstract
The invention relates to a brushing method adopting a multifilament brush roll, which comprises the steps of respectively arranging a plurality of multifilament brush rolls on the upper surface and the lower surface of a stainless steel strip, and carrying out brush roll rotating speed control, degreasing fluid spraying and brush roll pressing amount control, wherein: in the control of the rotating speed of the brush roll, the rotating speed of the multifilament brush roll is controlled to be 900-1200 rpm, and meanwhile, the running speed of the stainless steel strip is controlled to be lower than 100 m/min; in degreasing fluid spraying, spraying degreasing fluid to the surface of the stainless steel strip material in a fan-shaped spraying mode through a nozzle, wherein the fan-shaped spraying angle range of the nozzle is controlled to be 95-115 degrees, and the spraying direction of the nozzle is controlled to be an angle of 15-35 degrees with the surface of the stainless steel strip material; in the control of the rolling reduction of the brush roller, the rolling reduction of the multifilament brush roller is controlled to be 2-3 mm. By utilizing the brushing method, the quality defects of surface scratch, poor cleaning and the like generated during the brushing of the precision stainless steel can be overcome, and the high-quality requirement of the precision stainless steel strip can be met.
Description
Technical Field
The invention belongs to the technical field of production processes of precision stainless steel bands, and particularly relates to a brushing method adopting a multifilament brush roller.
Background
In the process of cold rolling of the stainless steel strip, rolling oil is usually used as a lubricant according to technological requirements, the lubricant can leave a layer of oil film on the surface of the stainless steel strip after being degreased by a wiping roller, and the layer of oil film can generate a carburization phenomenon due to heating decomposition when being annealed by a bright annealing furnace, so that the annealing performance and the surface treatment effect of the stainless steel strip are influenced. Meanwhile, the oil film is decomposed to cause great influence on the annealing atmosphere, the dew point and the oxygen content of hydrogen in the furnace are increased, and the stainless steel strip is oxidized after being annealed. Therefore, the stainless steel strip needs to be degreased before annealing, wherein degreasing is to destroy an oil film on the surface of the stainless steel strip by using saponification and emulsification of an alkali liquor degreasing agent through wetting, permeation, winding, dispersion and solubilization. After the oil film is softened and damaged, the brush roller is used for brushing metal scraps such as iron, tin, phosphorus and the like and residual grease on the surface of the steel belt, alkali liquor is sprayed on the brushing part to lubricate the brushing surface, and the brushed greasy pollutants on the surface are washed away.
Generally, the surface roughness of the precision stainless steel is about Ra0.13-0.16, the smooth surface gully is small, and the existing monofilament bristles with the diameter of 0.3-0.5 mm are easy to clean. The roughness of part of special precision stainless steel is about Ra0.19-0.21, after the surface roughness is improved, the existing monofilament bristles with the diameters of 0.3-0.5 mm have poor cleaning effect on the deep layer of the steel belt, and dirt and grease in gullies are difficult to clean.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to develop a brushing method suitable for precision stainless steel having a surface roughness greater than ra0.19 to solve the problem of poor cleaning effect of high-roughness surface of precision stainless steel.
Disclosure of Invention
The invention aims to solve the bottleneck problem of the precision stainless steel in the degreasing and brushing process, namely: if the diameter of the existing monofilament bristles is too small, the root supporting force is not enough, and the brushing effect is poor; if the diameter is too large, the surface of the stainless steel strip is scratched, and metal chips in grooves on the microscopic surface of the stainless steel strip cannot be thoroughly cleaned. In order to overcome the defects in the prior art, the invention provides a brushing method adopting a multifilament brush roller, which is particularly suitable for brushing the surface of precision stainless steel with the surface roughness larger than Ra0.19.
The multifilament brush roll comprises multifilament bristles and a roll body, wherein the multifilament bristles are formed by bundling multi-heel monofilament bristles with the diameter not more than 0.03mm, the diameter of the multifilament bristles is 1.2-1.5 mm, the length of the multifilament bristles is 40-55 mm, the diameter of the roll body is not less than 400mm, and the arrangement density of the multifilament bristles on the roll body is more than 50%.
Preferably, in the above brush roller, the bundle of multi-filament bristles is wound with polytetrafluoroethylene fibers in a spiral shape on the circumferential surface thereof and cured with a vinyl resin.
Preferably, in the above-described brush roller of the present invention, the multi-filament bristles are formed of multi-heeled monofilament bristle bundles having a diameter of 0.02 mm.
The brushing method adopting the multifilament brush roll comprises the steps of respectively arranging a plurality of multifilament brush rolls on the upper surface and the lower surface of a stainless steel strip and respectively brushing the upper surface and the lower surface of the stainless steel strip, wherein each multifilament brush roll comprises multifilament bristles and a roll body, the multifilament bristles are formed by bundling multi-heel monofilament bristles with the diameter not more than 0.03mm, the length of each multifilament bristle is 40-55 mm, the diameter of the roll body is not less than 400mm, the setting density of the multifilament bristles on the roll body is more than 50%, the brushing method further comprises the steps of brush roll rotating speed control, degreasing liquid spraying and brush roll pressing amount control, and the brushing method comprises the following steps of: in the control of the rotating speed of the brush roll, the rotating speed of the multifilament brush roll is controlled to be 900-1200 rpm, and meanwhile, the running speed of the stainless steel strip is controlled to be lower than 100 m/min; in degreasing fluid spraying, spraying degreasing fluid to the surface of a stainless steel strip in a fan-shaped spraying mode through nozzles, wherein the nozzles are arranged at intervals of 200-250 mm, the fan-shaped spraying angle range of the nozzles is controlled to be 95-115 degrees, the spraying direction of the nozzles is controlled to be an angle of 15-35 degrees with the surface of the stainless steel strip, the total spraying flow of the nozzles is controlled to be not less than 5L/min per 100mm of brush surface of the stainless steel strip, and the temperature of the degreasing fluid is controlled to be 65-80 ℃; in the control of the rolling reduction of the brush roller, the rolling reduction of the multifilament brush roller is controlled to be 2-3 mm.
Preferably, in the above brushing method using the multi-filament brush roller according to the present invention, the spraying direction of the nozzle is controlled to be at an angle of 25 ° to the surface of the stainless steel strip.
Preferably, in the above-described brushing method using the multifilament brush roller according to the invention, in the brush roller depression amount control, the brush roller depression amount is increased or decreased by increasing or decreasing the current of the brush roller control motor.
Preferably, in the above brushing method using the multi-filament brush rolls according to the present invention, two multi-filament brush rolls are symmetrically disposed on the upper and lower surfaces of the stainless steel strip.
Preferably, in the above-mentioned brushing method using the multi-filament brush roller according to the present invention, the rotation direction of the multi-filament brush roller is controlled to be opposite to the traveling direction of the stainless steel strip.
As a specific embodiment, in the brushing method using the multi-filament brush rolls according to the present invention, two multi-filament brush rolls having a bristle density of 55%, a bristle length of 50mm, and a brush roll diameter of 400mm are symmetrically disposed on upper and lower surfaces of a stainless steel band; the rotating speed of the brush roll is 1100rpm, the rolling reduction of the brush roll is 3mm, and the running speed of the stainless steel strip is 60 m/min; the interval of the nozzles is 220mm, the fan-shaped spraying angle range of the nozzles is 95 degrees, the spraying direction angle of the nozzles relative to the surface of the stainless steel strip is 25 degrees, and the total spraying flow of the nozzles is 7.5L/min per 100mm of brush surface of the stainless steel strip; the temperature of the degreased liquid is 78 ℃.
By using the brushing method adopting the multifilament brush roll, the parameters such as the bristle density, the brush roll rotating speed, the degreasing liquid spraying, the brush roll pressing amount, the brush roll diameter, the bristle length and the like are strictly controlled, so that the surface degreasing brushing of the high-roughness precision stainless steel strip is realized, the quality defects of surface scratches, poor cleaning and the like generated during the brushing of the precision stainless steel can be overcome, the method is suitable for industrial mass production, and the high-quality requirement of the precision stainless steel strip is met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the construction of a multi-filament brushroll of the present invention;
FIG. 2a is a schematic illustration of brushing with a prior art monofilament bristle;
FIG. 2b is a schematic view of brushing with the multi-filament brush roll of the present invention.
Detailed Description
Definition 1: herein, the term "SUS 304" refers to stainless steel having a GB designation of 06Cr19Ni 10.
Definition 2: as used herein, the term "precision stainless steel" refers to stainless steel strip having a thickness of 0.05mm or less (including 0.05 mm).
As shown in fig. 1 and 2b, the multi-filament brush roller 1 of the present invention includes multi-filament bristles 11 and a roller 12, the multi-filament bristles 11 are formed of a bundle of multi-heel monofilament bristles having a diameter of not more than 0.03mm, polytetrafluoroethylene fibers are spirally wound around the circumference of the bundle of multi-heel monofilament bristles, and are cured using a vinyl resin, so as to improve the supporting strength of the multi-filament bristles 11, thereby obtaining a high brushing supporting force, which can provide a good grinding ability to the brushing ends of the multi-filament bristles 11, exert a maximum brushing force, and improve the brushing effect. Under the condition that the brushing tail ends of the multifilament bristles 11 are stressed and are in the degreasing fluid environment, the multifilaments are scattered into a plurality of monofilaments, and the monofilament bristles can extend into the microscopic surface grooves of the stainless steel strip due to small diameters, so that metal chips in the microscopic surface grooves of the stainless steel strip can be cleaned, and the brushing effect is improved.
As shown in fig. 2a and 2b, the diameter of the monofilament bristles of 0.3-0.5 mm is thicker, and the head of the bristles cannot extend into the inside of the microscopic surface groove of the stainless steel strip for effective cleaning, whereas the brushing end of the multifilament bristles 11 of the multifilament brush roller 1 of the present invention is stressed and is in the environment of degreasing fluid, the multifilament is spread into a plurality of monofilaments, and the monofilament bristles can extend into the microscopic surface groove of the stainless steel strip due to the diameter of the monofilament bristles not greater than 0.03mm, so that the metal chips in the microscopic surface groove of the stainless steel strip can be cleaned.
The diameter of the multi-filament bristles 11 is controlled to be 1.2 to 1.5mm, the length of the multi-filament bristles 11 is controlled to be 40 to 55mm, and the supporting strength of the bristles having a length exceeding 55mm is weakened, which is not favorable for brushing.
The plurality of multifilament bristles 11 are arranged on the roller body 12, and the arrangement density of the multifilament bristles 11 on the roller body 12, namely the bristle density, is more than 50%. The increase of the bristle density can improve the brushing amount of the surface of the stainless steel strip in unit time, and the degreasing effect is also in positive correlation with the bristle density.
The diameter of the roller body 12 is set to be not less than 400mm, and the large-diameter multifilament brush roller can ensure that the multifilament brush roller has a larger contact area with the surface of the stainless steel strip under the state of equal pressing amount, so that the brushing effect can be improved.
Preferably, the multi-filament bristles 11 are formed of multi-heeled monofilament bristle bundles having a diameter of 0.02 mm.
The brushing method adopting the multifilament brush rolls is suitable for brushing the precision stainless steel with the surface roughness of more than Ra0.19 by using the multifilament brush rolls, and comprises the steps of arranging a plurality of multifilament brush rolls on a brushing machine, and respectively arranging the plurality of multifilament brush rolls on the upper surface and the lower surface of a stainless steel strip so as to respectively brush the upper surface and the lower surface of the stainless steel strip.
The brushing method adopting the multifilament brush roll also comprises the steps of controlling the rotating speed of the brush roll, spraying degreasing liquid and controlling the pressing amount of the brush roll, wherein:
in the control of the rotating speed of the brush roll, the rotating speed of the multifilament brush roll is controlled to be 900-1200 rpm, and meanwhile, the running speed of the stainless steel strip is controlled to be lower than 100m/min, and researches show that the rotating speed is increased by 10%, and the surface cleanliness of the stainless steel strip after being brushed can be increased by 5% -6%;
in the degreasing liquid spraying process, degreasing liquid is sprayed on the surface of the stainless steel strip to ensure the lubrication and cooling of the brushing process, otherwise, the high-speed rotating multifilament brush roller can cause serious scratches on the surface of the stainless steel strip, and meanwhile, the dry friction can cause the temperature of bristles of the multifilament brush roller to rise to cause the end parts of the bristles to melt;
in the control of the rolling amount of the brush roller, the rolling amount of the multifilament brush roller is controlled to be 2-3 mm, so that the bristles can be guaranteed to be slightly inclined, the bristle body still keeps good supporting force, if the rolling amount is too small, the brushing effect is poor, the rolling amount is too large, the end parts of the bristles deform seriously, and the bristles are easily broken or abraded, so that the service life is shortened.
Preferably, in the degreasing fluid spraying, the degreasing fluid is sprayed in a fan-shaped spraying mode through nozzles, the nozzles are arranged at intervals of 200-250 mm, and the fan-shaped spraying angle range of the nozzles is controlled to be 95-115 degrees, so that the spraying fan-shaped surfaces of the nozzles are staggered, and the sprayed degreasing fluids are prevented from interfering with each other and influencing the spraying pressure; the spraying direction of the nozzle is controlled to be at an angle of 15-35 degrees, more preferably at an angle of 25 degrees, with the tangential direction of the multifilament brush roll, i.e. the surface of the stainless steel strip; the total flow rate of all the nozzles is controlled to be not less than 5L/min per 100mm stainless steel strip brushing surface.
Preferably, in the degreasing fluid spraying process, the temperature of the degreasing fluid is controlled to be 65-80 ℃, the temperature is lower than 65 ℃, the alkali liquor activity of the degreasing fluid is poor, the degreasing fluid is easy to crystallize at high concentration, the temperature exceeds 80 ℃, the alkali liquor activity of the degreasing fluid is also reduced, and the operation cost for maintaining high temperature is increased rapidly.
Preferably, in the brush roller depression amount control, the depression amount control of the multi-filament brush roller is performed in a constant depression force control mode, and the closed-loop control is performed by a current feedback value of the brush roller control motor. The brush roller pressing amount and the current have a linear relation, and the brush roller pressing amount can be accurately controlled through a current feedback value of the brush roller control motor, namely the current of the brush roller control motor is increased or decreased, namely the brush roller pressing amount can be correspondingly increased or decreased. For example, in the case where the diameter of the brush roller is 400mm and the brush roller control motor power is 5kw, the current of the brush roller control motor is increased by 1A for every increase of the brush roller depression amount of 0.7 mm.
Preferably, four multi-filament brush rolls may be provided on the scrubber, two being symmetrically arranged on each of the upper and lower surfaces of the stainless steel strip.
Preferably, the direction of rotation of the multifilament roller is counter to the direction of travel of the stainless steel strip for optimum brushing.
By using the brushing method adopting the multifilament brush roll, the parameters such as the bristle density, the brush roll rotating speed, the degreasing liquid spraying, the brush roll pressing amount, the brush roll diameter, the bristle length and the like are strictly controlled, so that the surface degreasing brushing of the high-roughness precision stainless steel strip is realized, the quality defects of surface scratches, poor cleaning and the like generated during the brushing of the precision stainless steel can be overcome, the method is suitable for industrial mass production, and the high-quality requirement of the precision stainless steel strip is met.
The brushing method using the multi-filament brush roller according to the present invention will be described in detail with reference to specific examples thereof.
Example 1
Example 1A precision stainless steel stock roll of SUS304 grade was selected, having a thickness of 0.04mm, a width of 600mm, a surface roughness of Ra0.20, a flat steel strip, no scratch, no wrinkles, a surface residual oil content of 260mg/m2(one side). The requirements of finished steel belts are as follows: the thickness is 0.04mm, the width is 600mm, the surface is clean, the color is not uniform, the scratch is avoided, and the surface residual oil content is less than 5mg/m2(one side). The stainless steel strip is degreased and scrubbed through a cleaning unit at the running speed of 60m/min, and the scrubbing unit is provided with 4 multifilament brush rolls which are respectively arranged on the upper surface and the lower surface of the stainless steel strip. The control parameters in the multi-filament brush roll brushing method of example 1 were: the brush density is 55%, the rotating speed of the brush roll is 1100rpm, the interval of the nozzles is 220mm, the fan-shaped spraying angle range of the nozzles is 95 degrees, the spraying direction angle of the nozzles relative to the surface of the stainless steel strip is 25 degrees, the total spraying flow of the nozzles is 7.5L/min per 100mm of the brush surface of the stainless steel strip, the degreasing fluid temperature is 78 ℃, the pressing amount of the brush roll is 3mm, the diameter of the brush roll is 400mm, and the length of the brush is 50 mm.
By using the brushing method of the embodiment 1 of the invention, after the SUS304 precision stainless steel is degreased and brushed, the surface is clean, has no color unevenness and no scratch, and the residual oil amount on the surface is detected to be 4.3mg/m by a refractive index method2(one side).
It should be noted that the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or alterations do not depart from the spirit of the invention.
Claims (6)
1. The brushing method adopting the multifilament brush roll comprises the steps of respectively arranging a plurality of multifilament brush rolls on the upper surface and the lower surface of a stainless steel strip and respectively brushing the upper surface and the lower surface of the stainless steel strip, wherein each multifilament brush roll comprises multifilament bristles and a roll body, the multifilament bristles are formed by bundling multi-heeled monofilament bristles with the diameter not larger than 0.03mm, the length of each multifilament bristle is 40-55 mm, the diameter of the roll body is not smaller than 400mm, and the setting density of the multifilament bristles on the roll body is larger than 50%, and the brushing method further comprises the steps of brush roll rotating speed control, degreasing liquid spraying and brush roll pressing amount control, wherein:
in the control of the rotating speed of the brush roll, the rotating speed of the multifilament brush roll is controlled to be 900-1200 rpm, and meanwhile, the running speed of the stainless steel strip is controlled to be lower than 100 m/min;
in degreasing fluid spraying, spraying degreasing fluid to the surface of a stainless steel strip in a fan-shaped spraying mode through nozzles, wherein the nozzles are arranged at intervals of 200-250 mm, the fan-shaped spraying angle range of the nozzles is controlled to be 95-115 degrees, the spraying direction of the nozzles is controlled to be an angle of 15-35 degrees with the surface of the stainless steel strip, the total spraying flow of the nozzles is controlled to be not less than 5L/min per 100mm of brush surface of the stainless steel strip, and the temperature of the degreasing fluid is controlled to be 65-80 ℃;
in the control of the rolling reduction of the brush roller, the rolling reduction of the multifilament brush roller is controlled to be 2-3 mm.
2. The brushing method using the multifilament brush roller according to claim 1, wherein the jetting direction of the nozzle is controlled to be an angle of 25 ° with the surface of the stainless steel strip.
3. The brushing method using the multifilament brush roller according to claim 1, wherein in the brush roller depression amount control, the brush roller depression amount is increased or decreased by increasing or decreasing the current of the brush roller control motor.
4. The brushing method using the multifilament brush rolls according to claim 1 wherein two multifilament brush rolls are symmetrically arranged on each of the upper and lower surfaces of the stainless steel strip.
5. The brushing method using the multi-filament brush roller according to claim 1, wherein the rotation direction of the multi-filament brush roller is controlled to be opposite to the traveling direction of the stainless steel strip.
6. The brushing method using the multi-filament brush rolls according to claim 1, wherein two multi-filament brush rolls are arranged on each of upper and lower surfaces of the stainless steel band, and the multi-filament brush rolls have a bristle density of 55%, a bristle length of 50mm, and a roll body diameter of 400 mm; the rotating speed of the brush roll is 1100rpm, the rolling reduction of the brush roll is 3mm, and the running speed of the stainless steel strip is 60 m/min; the interval of the nozzles is 220mm, the fan-shaped spraying angle range of the nozzles is 95 degrees, the spraying direction angle of the nozzles relative to the surface of the stainless steel strip is 25 degrees, and the total spraying flow of the nozzles is 7.5L/min per 100mm of brush surface of the stainless steel strip; the temperature of the degreased liquid is 78 ℃.
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| CN202010755236.1A CN112122369B (en) | 2020-07-31 | 2020-07-31 | Brushing method using multifilament brush roller |
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| CN202010755236.1A CN112122369B (en) | 2020-07-31 | 2020-07-31 | Brushing method using multifilament brush roller |
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| CN115138608A (en) * | 2022-06-21 | 2022-10-04 | 首钢京唐钢铁联合有限责任公司 | Control method and device of brush roll, electronic equipment and medium |
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| CN102921747A (en) * | 2012-11-21 | 2013-02-13 | 中冶南方工程技术有限公司 | Novel inner spray type brush roll |
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| CN108746013A (en) * | 2018-05-31 | 2018-11-06 | 山西太钢不锈钢精密带钢有限公司 | A kind of method for cleaning surface of precise paper-thin stainless steel band |
| CN109848246A (en) * | 2019-01-16 | 2019-06-07 | 邱宇豪 | A kind of derusting process of wire rod |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6313613A (en) * | 1986-07-04 | 1988-01-20 | Kobe Steel Ltd | Descaling method using brush roll for sheet stock |
| JP2000125938A (en) * | 1998-10-29 | 2000-05-09 | Hotani:Kk | Brush roll and its brush element |
| CN101569896A (en) * | 2009-05-22 | 2009-11-04 | 中色科技股份有限公司 | Method for designing equipment removing oxide skin on surface of slab band |
| CN102921747A (en) * | 2012-11-21 | 2013-02-13 | 中冶南方工程技术有限公司 | Novel inner spray type brush roll |
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| CN108746013A (en) * | 2018-05-31 | 2018-11-06 | 山西太钢不锈钢精密带钢有限公司 | A kind of method for cleaning surface of precise paper-thin stainless steel band |
| CN109848246A (en) * | 2019-01-16 | 2019-06-07 | 邱宇豪 | A kind of derusting process of wire rod |
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| CN112122369A (en) | 2020-12-25 |
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