CN104209352A - Use method of brush roll on cleaning section of continuous annealing production line - Google Patents

Abstract

The invention provides a use method of a brush roll on the cleaning section of a continuous annealing production line. When the width of strip steel is increased, the pressing amount of the brush roll is increased; when the speed of the thin strip steel is increased, the pressing amount of the brush roll is increased; when the high-strength steel is applied to the production line, the pressing amount of the brush roll is increased; when the applying time of the brush roll on the production line is increased, the pressing amount of the brush roll is increased. The use method of the brush roll on the cleaning section of the continuous annealing production line has the advantage that under the conditions of increase of strip steel width, increase of thin strip steel speed, applying of high strength steel to production line, and increase of applying time of brush roll on production line, by increasing the pressing amount of the brush roll, the brushing quality of the surface of the strip steel is improved, and a good cleaning effect is obtained.

Description

Cleaning section brush roll using method on continuous annealing production line

Technical field

The invention belongs to cold rolled sheet production technical field, particularly cleaning section brush roll using method on a kind of continuous annealing production line.

Background technology

Belt steel surface total residual after cold rolling some ROLLING OIL, iron powder and other pollutant.Cleaning section is exactly by the removing residues of Cold-strip Steel Surface, ensure the cleaning quality of band steel, and the clean-up performance of alkali lye is most important for the surface quality of product.In cold-rolling continuous annealing cleaning section, cleaning section technology groove is mainly divided into No. 1 spary to wash, No. 2 sparies are washed, electrolytic cleaned, No. 3 brush machines, 4 grades of rinsings.The process section that cleaning section contains brush roll is respectively No. 1 circulating slot, No. 2 circulating slots, No. 3 brush machine circulating slots, and the major function that No. 1 spary is washed is the hydro-peening of mechanical cleaning at bristle and heat alkali liquid, removes the iron powder, the greasy dirt that remain on belt steel surface in advance; The major function that No. 2 sparies are washed is the hydro-peening of mechanical cleaning at bristle and heat alkali liquid, removes the iron powder, the greasy dirt that remain on belt steel surface; The function of electrolytic cleaned be will band steel by the strong base solution of heat, remove the oil of belt steel surface, iron powder and other impurity in the belt steel surface effect (blast action) that produces electrolysis; The major function of No. 3 brush machines is hydro-peenings of mechanical cleaning at bristle and hot water, cleaning belt steel surface; The function of 4 grades of rinsings be clear water hydro-peening and squeeze roll thereafter extract effect, in order to make water consumption minimum, cleaning section uses 4 grades of rinse-systems; The function of drying system is with hot air dries belt steel surface moisture.The driving of brush roll is by Electric Machine Control, and the pressure of brush roll or open controls by cylinder, and the load of brush roll is controlled by screw motor, and screw mandrel governor motion ensures the synchronous of brush roll two edging.The load of usual brush roll is changeless, and in reality cleaning is produced, fast at the thin material strip speed of cleaning section, or strip steel specification is wider, or cleaning is high-strength steel, or time in the situation such as brush roll service time is longer, the changeless brush roll set model of brush roll load is taked to scrub, there will be the problem that strip cleaning is unclean, the surface clean quality of band steel is reduced greatly.

Summary of the invention

Technical problem to be solved by this invention is to provide cleaning section brush roll using method on a kind of continuous annealing production line that can improve strip cleaning quality.

For solving the problems of the technologies described above, the invention provides cleaning section brush roll using method on a kind of continuous annealing production line, when strip width increases, increasing brush roll drafts; When thin material strip speed increases, increase brush roll drafts; When high-strength steel is reached the standard grade, increase brush roll drafts; According to brush roll on-line time setting brush roll drafts.

Further, when described strip width is increased to the 50mm being greater than of that month order mean breadth, brush roll reduction settings is 4.0-4.5%, and brush roll load reaches 27.0-28.0%, and brush roll electric current reaches 19.5-20.0A.

Further, described thin material strip speed is increased to and is greater than normal entry when filling cover speed, and brush roll reduction settings is 4.0-4.5%, and brush roll load reaches 27.0-28.0%, and brush roll electric current reaches 19.5-20.0A.

Further, when described high-strength steel is reached the standard grade, brush roll reduction settings is 4.0-4.5%, and brush roll load reaches 27.0-28.0%, and brush roll electric current reaches 19.5-20.0A.

Further, described brush roll on-line time be 1-2 week time, brush roll reduction settings is 3.0-3.5%, and brush roll load reaches 23.5-26.0%, and brush roll electric current reaches 18.0-19.0A;

Described brush roll on-line time be 3-4 week time, brush roll reduction settings is 3.5-4.0%, and brush roll load reaches 26.0-27.0%, and brush roll electric current reaches 19.0-19.5A;

Described brush roll on-line time be 5-8 week time, brush roll reduction settings is 4.0-4.5%, and brush roll load reaches 27.0-28.0%, and brush roll electric current reaches 19.5-20.0A;

Described brush roll on-line time be 8 weeks to when rolling off the production line, brush roll reduction settings is 4.5-5.5%, and brush roll load reaches 28.0-29.0%, and brush roll electric current reaches 20.0-22.0A.

Cleaning section brush roll using method on a kind of continuous annealing production line provided by the invention, strip steel specification for cleaning is wider, the thin material strip steel speed of cleaning, cleaning be the various different situations such as high-strength steel, brush roll on-line time are longer, set corresponding brush roll drafts respectively, belt steel surface reflectance value after cleaning is significantly improved, namely significantly improve the strip cleaning quality in above-mentioned various situation, achieve the significantly raising of strip cleaning quality.

Detailed description of the invention

At band steel in cleaning process, the rotation of cleaning section brush roll is controlled by brushroll motor, and the pressure of brush roll or open controls by cylinder, and the load of brush roll is controlled by screw motor, and screw mandrel governor motion ensures that brush roll two edging is synchronous.When the actual drafts of the brush roll that brushroll motor current value calculates is lower than setting drafts, instruction screw motor is to the action of brush roll closing direction, brushroll motor electric current is increased, corresponding actual drafts and load all increase, when the actual drafts of the brush roll calculated by brushroll motor current value is higher than setting drafts, instruction screw motor is to the action of brush roll opening direction, brushroll motor electric current is reduced, corresponding actual drafts and load all reduce, when the actual drafts of the brush roll calculated by brushroll motor current value equals setting drafts, instruction screw motor stops action, maintain current brush roll drafts.

In traditional strip cleaning process, the load of brush roll is changeless, and in the washed journey of traditional strip brush, the drafts of brush roll sets as shown in table 1 usually.

Table 1

Drafts (%)	3.0-3.5
		Load (%)	23.5-26.0
Electric current (A)	18.0-19.0

Wherein, drafts %=(electric current-no-load current)/(75-no-load current)

Load=electric current/75

Motor full-load current is unified is set as 75A, obtains according to design motor.No-load current is the current value under brush roll idle condition, can measure in practice.

But scrub in production actual, there will be thin material strip speed fast, or strip steel specification is wider, or cleaning is high-strength steel, or in the situation such as brush roll service time is longer, the brush roll set model according to table 1 is scrubbed, then band steel can be cleaning dirty, and the cleaning quality of belt steel surface can reduce.

Given this, cleaning section brush roll using method on a kind of continuous annealing production line provided by the invention, when producing thin material strip steel, because speed of production easily causes cleaning dirty soon, now increase brush roll load to improve cleaning quality, when therefore producing thin material strip steel, when the speed of thin material strip steel be greater than normal entry fill cover speed time, be as shown in table 2 by brush roll reduction settings.

Table 2

Drafts (%)	4.0-4.5
		Load (%)	27.0-28.0
Electric current (A)	19.5-20.0

Because brush roll often scrubs the band steel of conventional specification, regular width with steel is 1200-1350mm, therefore on brush roll correspondence position, wearing and tearing are very fast, although brush roll makes edge chamfering, but also cannot overcome the cleaning dirty problem of wide material completely, therefore, when the strip width produced is greater than the 50mm of of that month order mean breadth, brush roll reduction settings is as shown in table 3.

Table 3

Drafts (%)	4.0-4.5
		Load (%)	27.0-28.0
Electric current (A)	19.5-20.0

Because high-strength steel surface is more compared with other steel grade surface residue, conventional cleaning is difficult to the residue of Ex-all belt steel surface, and when therefore producing high-strength steel, brush roll reduction settings is as shown in table 4.

Table 4

Drafts (%)	4.0-4.5
		Load (%)	27.0-28.0
Electric current (A)	19.5-20.0

Brush roll on-line time is longer, and centre position wearing and tearing are comparatively serious, and its edge long brush hairs can increase load current, and therefore will set the drafts of brush roll according to brush roll on-line time length, the brush roll reduction settings that brush roll is reached the standard grade in different time is as shown in table 5.

Table 5

Wider according to strip steel specification, produce thin material strip steel speed, high-strength steel is produced, the concrete condition of brush roll on-line time sets the drafts of brush roll, improves the strip cleaning quality under all steel kind, full specification, full process speed.Cleaning section brush roll using method and traditional brush roll using method on continuous annealing production line provided by the invention, the belt steel surface reflectivity after scrubbing is as shown in table 6.

Table 6

The reflectivity data that strip brush as can be seen from table 6 records after washing, cleaning section brush roll using method on continuous annealing production line provided by the invention, the reflectivity of the band steel after cleaning is improved, and the strip surface quality after namely scrubbing obtains obvious improvement, achieves good washing effect.

It should be noted last that, above detailed description of the invention is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to example to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.

Claims (5)

1. a cleaning section brush roll using method on continuous annealing production line, is characterized in that: when strip width increases, and increases brush roll drafts; When thin material strip speed increases, increase brush roll drafts; When high-strength steel is reached the standard grade, increase brush roll drafts; According to brush roll on-line time setting brush roll drafts.

2. cleaning section brush roll using method on continuous annealing production line according to claim 1, it is characterized in that: when described strip width is increased to the 50mm being greater than of that month order mean breadth, brush roll reduction settings is 4.0-4.5%, brush roll load reaches 27.0-28.0%, and brush roll electric current reaches 19.5-20.0A.

3. cleaning section brush roll using method on continuous annealing production line according to claim 1, it is characterized in that: described thin material strip speed is increased to and is greater than normal entry when filling cover speed, brush roll reduction settings is 4.0-4.5%, brush roll load reaches 27.0-28.0%, and brush roll electric current reaches 19.5-20.0A.

4. cleaning section brush roll using method on continuous annealing production line according to claim 1, is characterized in that: when described high-strength steel is reached the standard grade, and brush roll reduction settings is 4.0-4.5%, and brush roll load reaches 27.0-28.0%, and brush roll electric current reaches 19.5-20.0A.

5. cleaning section brush roll using method on continuous annealing production line according to claim 1, it is characterized in that: described brush roll on-line time be 1-2 week time, brush roll reduction settings is 3.0-3.5%, and brush roll load reaches 23.5-26.0%, and brush roll electric current reaches 18.0-19.0A;

Described brush roll on-line time be 3-4 week time, brush roll reduction settings is 3.5-4.0%, and brush roll load reaches 26.0-27.0%, and brush roll electric current reaches 19.0-19.5A;

Described brush roll on-line time be 5-8 week time, brush roll reduction settings is 4.0-4.5%, and brush roll load reaches 27.0-28.0%, and brush roll electric current reaches 19.5-20.0A;

Described brush roll on-line time be 8 weeks to when rolling off the production line, brush roll reduction settings is 4.5-5.5%, and brush roll load reaches 28.0-29.0%, and brush roll electric current reaches 20.0-22.0A.