CN114260318B - Five-ruler ultra-wide ultra-thin precise stainless steel strip cold rolling plate type control method - Google Patents
Five-ruler ultra-wide ultra-thin precise stainless steel strip cold rolling plate type control method Download PDFInfo
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 29
- 239000010935 stainless steel Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005097 cold rolling Methods 0.000 title claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000003908 quality control method Methods 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims description 15
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- 230000001276 controlling effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 4
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Abstract
The invention particularly relates to a five-ruler ultra-wide ultra-thin precision stainless steel strip cold rolling plate type control method, wherein the five-ruler ultra-wide ultra-thin precision stainless steel strip is rolled by a stainless steel rolling mill, the flatness and convexity of the strip steel are adjusted and controlled by a plate type adjusting means, the overall plate type quality control of the strip steel in full length and full width is realized, the flatness and convexity of the strip steel are adjusted and controlled by the plate type adjusting means, and the aim of the overall plate type quality control of the strip steel in full length and full width is realized.
Description
Technical Field
The invention particularly relates to a control method for cold rolling and rolling plate types of a five-ruler ultra-wide ultra-thin precise stainless steel belt.
Background
With the development of technology, various products are developing to high efficiency, energy saving, high performance and increasing yield, and the demand for new materials is becoming stronger, and in this context, the stainless steel industry is developing to high efficiency, energy saving, high performance and increasing yield.
At present, most of precise strip steel products have the width below 1250mm, and the precise strip steel products with the partial thickness below 1.0mm also belong to stainless steel with the width below 1250mm, the yield of narrow stainless steel is low, the production cost is high, the market application value is lower, the bottleneck problem of the precise stainless steel industry is still caused in the ultra-wide stainless steel precise strip steel production, the problems that the shape is poor, the surface defects and the thickness tolerance cannot meet the use requirements and the like often occur, and therefore, the process control of the cold rolling plate type of the 5-ruler ultra-wide ultra-thin precise stainless steel strip steel is necessary to provide for meeting the production requirements of various procedures and meeting the market and the use requirements in quality.
The plate shape is one of important indexes for measuring the quality of cold-rolled broadband steel, the plate shape control technology is not only one of core technologies for strip steel production, but also one of hot spots studied in the current steel rolling field, common plate shape bad phenomena are double-side waves, single-side waves, middle drums, 1/4 drums, sickle bends and the like, and the cold-rolled plate shape is mainly controlled by an automatic control set value of the plate shape and on-line plate shape adjustment control.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a five-ruler ultra-wide ultra-thin precision stainless steel strip cold rolling plate type control method, so as to achieve the purposes of adjusting and controlling the flatness and convexity of the strip steel by adopting a plate type adjusting means and realizing comprehensive plate type quality control of the whole length and the whole width of the strip steel.
The technical scheme for realizing the five-ruler ultra-wide ultra-thin precise stainless steel strip cold rolling plate type control method is as follows:
the ultra-wide ultra-thin precision stainless steel of five chi adopts the stainless steel rolling mill to carry out the pressure rolling, adopts the board type adjustment means to adjust and control belted steel straightness and convexity, realizes the comprehensive board type quality control to belted steel full length, full width, includes:
step one, presetting a plate type control system, wherein H represents thickness, X2 represents a middle plate type control coefficient, XE represents a side plate type control coefficient, EN represents a plate type side control width, H is less than or equal to 0.6mm discharging plate type preset value X2=18, XE=28, EN=11, a section discharging plate type preset value X2=18 of which H is more than or equal to 0.6mm and less than or equal to 1.0mm, XE=21, EN=13, a section discharging plate type preset value X2=16 of which H is more than or equal to 1.0mm, XE=24, EN=13, a section discharging plate type preset value X2=12 of which H is more than or equal to 1.4 mm, XE=16, EN=13, a section discharging plate type preset value X2=12 of which H is more than or equal to 2.4mm and EN=13;
step two, online adjusting the control model, and defining and perfecting a final plate type control to meet a plate type preset value by controlling the roller system proportion, the roller system size proportion, the roller system convexity proportion and the roller system using management and control and a rolling process on the basis of the step one;
the main roll system of the twenty-roll 5-ruler ultra-wide ultra-thin precise stainless steel strip rolling mill is composed of 2 working rolls, 4 intermediate driving rolls, 2 intermediate idler rolls and 8 supporting rolls in a matching way;
the diameters of the working rolls are 64-70mm, the diameters of the first intermediate roll are 114-116mm, the diameters of the driving rolls of the second intermediate roll are 195-198mm, the diameters of the second intermediate idler roll are 203-205mm, and the diameters of the supporting rolls are 297-300mm;
the roll system is controlled, the fatigue degree of the roll system is reduced by making a period, the service life of the roll system is prolonged, the roll system is replaced under 9 times of rolling of the working roll, 30 rolls of the first intermediate roll are replaced, 7 days of time of rolling of the second intermediate roll are replaced, and 10 days of time of rolling of the supporting roll are replaced.
Further, the convexity ratio of the roller system in the second step mainly controls convexity and taper of a middle roller and a middle idler roller, the taper of the middle roller is 0.5mm, the taper length of the middle roller is 260mm, the taper of the second section is 0.05mm, the taper length of the middle roller is 120mm, and the convexity of the middle idler roller is 0.2mm up and down respectively.
Further, in the second step, the rolling process is limited, the control plate type is optimized by limiting the reduction, speed and tension limiting, when the thickness of the finished product is larger than 2.0mm, the reduction speed of the discharge pass is below 200m/min, the rolling reduction speed is below 4.5%, the tension is 500KN, when the thickness of the finished product is 1.5mm-2.0mm, the reduction speed of the discharge pass is below 400m/min, the reduction speed of the discharge pass is below 6%, the tension is 440KN, when the thickness of the finished product is 1.0mm-1.5mm, the reduction speed of the discharge pass is below 450m/min, the reduction speed of the discharge pass is below 9%, the tension is 360KN, when the thickness of the finished product is below 1.0mm, the discharge pass is not limited in speed, the reduction speed of the discharge pass is below 10%, and the tension is below 250 KN.
Further, the two middle rollers are matched in size, the diameter of the root working roller is 67mm, the diameter of the first middle roller is 115mm, the diameter of the driving roller of the second middle roller is 196mm, the diameter of the second middle idler roller is 204mm, and the diameter of the supporting roller is 298mm.
The beneficial effects of the invention are as follows: according to the technical research of the ultra-thin ultra-wide precision stainless steel strip cold-rolled sheet, the sheet type is optimized according to the requirements of matching the sheet type automatic control preset value on the size of a roller system and the convexity of the roller system, the sheet type is optimized in the production of a rolling process strictly, the sheet type preset value is controlled to ensure that the flatness of the sheet type is good, the tolerance of the whole width is small, the whole rolling sheet type is consistent, the production of the next procedure is smooth, the quality is ensured, the production of the roll system is ensured, the service life of the roller system is prolonged by strictly controlling the service cycle, the use ratio of the roller system is improved, the optimal use is achieved, the production bottlenecks of sheet type difference, thickness tolerance fluctuation and poor surface in the subsequent processing process are solved through the sheet type control technology, and the method can be suitable for industrial mass production, and the requirements of high quality, high yield and low cost of the ultra-thin precision stainless steel strip with 5 bars are met.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples: the ultra-wide ultra-thin precision stainless steel of five chi adopts the stainless steel rolling mill to carry out the pressure rolling, adopts the board type adjustment means to adjust and control belted steel straightness and convexity, realizes the comprehensive board type quality control to belted steel full length, full width, includes:
step one, presetting a plate type control system, wherein H represents thickness, X2 represents a middle plate type control coefficient, XE represents a side plate type control coefficient, EN represents a plate type side control width, H is less than or equal to 0.6mm discharging plate type preset value X2=18, XE=28, EN=11, a section discharging plate type preset value X2=18 of which H is more than or equal to 0.6mm and less than or equal to 1.0mm, XE=21, EN=13, a section discharging plate type preset value X2=16 of which H is more than or equal to 1.0mm, XE=24, EN=13, a section discharging plate type preset value X2=12 of which H is more than or equal to 1.4 mm, XE=16, EN=13, a section discharging plate type preset value X2=12 of which H is more than or equal to 2.4mm and EN=13;
step two, online adjusting the control model, and defining and perfecting a final plate type control to meet a plate type preset value by controlling the roller system proportion, the roller system size proportion, the roller system convexity proportion and the roller system using management and control and a rolling process on the basis of the step one;
the main roll system of the twenty-roll 5-ruler ultra-wide ultra-thin precise stainless steel strip rolling mill is composed of 2 working rolls, 4 intermediate driving rolls, 2 intermediate idler rolls and 8 supporting rolls in a matching way;
the diameters of the working rolls are 64-70mm, the diameters of the first intermediate roll are 114-116mm, the diameters of the driving rolls of the second intermediate roll are 195-198mm, the diameters of the second intermediate idler roll are 203-205mm, and the diameters of the supporting rolls are 297-300mm;
the roll system is controlled, the fatigue degree of the roll system is reduced by making a period, the service life of the roll system is prolonged, the roll system is replaced under 9 times of rolling of the working roll, 30 rolls of the first intermediate roll are replaced, 7 days of time of rolling of the second intermediate roll are replaced, and 10 days of time of rolling of the supporting roll are replaced.
And step two, the convexity ratio of the roller system is mainly controlled by convexity and taper of a middle roller and a middle idler roller, the taper of the middle roller is 0.5mm, the taper length of the middle roller is 260mm, the taper of the second section is 0.05mm, the taper length of the middle roller is 120mm, and the convexity of the middle idler roller is 0.2mm up and down respectively.
In the second step, the rolling process limitation is used for optimizing the control plate type by limiting the reduction, speed and tension limitation of the discharge pass, when the thickness of the finished product is larger than 2.0mm, the reduction speed of the discharge pass is less than 200m/min, the reduction speed of the rolling is less than 4.5%, the tension is 500KN, when the thickness of the finished product is 1.5mm-2.0mm, the reduction speed of the discharge pass is less than 400m/min, the reduction speed of the discharge pass is less than 6%, the tension is 440KN, when the thickness of the finished product is 1.0mm-1.5mm, the reduction speed of the discharge pass is less than 450m/min, the reduction speed of the discharge pass is less than 9%, the tension is 360KN, when the thickness of the finished product is less than 1.0mm, the discharge pass is not limited, the reduction speed of the discharge pass is less than 10%, and the tension is less than 250 KN.
The second step is to match the size of the roller system, the diameter of the root working roller is 67mm, the diameter of the first intermediate roller is 115mm, the diameter of the second intermediate roller driving roller is 196mm, the diameter of the second intermediate idler roller is 204mm, and the diameter of the supporting roller is 298mm.
Claims (4)
1. A control method for cold rolling and rolling plate shapes of five-ruler ultra-wide ultra-thin precise stainless steel strips is characterized in that the five-ruler ultra-wide ultra-thin precise stainless steel strips are rolled by a stainless steel rolling mill, and the control method is characterized in that: the flatness and convexity of the strip steel are regulated and controlled by adopting a plate type regulating means, so that the comprehensive plate type quality control of the whole length and the whole width of the strip steel is realized, and the method comprises the following steps:
step one, presetting a plate type control system, wherein H represents thickness, X2 represents a middle plate type control coefficient, XE represents a side plate type control coefficient, EN represents a plate type side control width, H is less than or equal to 0.6mm discharging plate type preset value X2=18, XE=28, EN=11, a section discharging plate type preset value X2=18 of which H is more than or equal to 0.6mm and less than or equal to 1.0mm, XE=21, EN=13, a section discharging plate type preset value X2=16 of which H is more than or equal to 1.0mm, XE=24, EN=13, a section discharging plate type preset value X2=12 of which H is more than or equal to 1.4 mm, XE=16, EN=13, a section discharging plate type preset value X2=12 of which H is more than or equal to 2.4mm and EN=13;
step two, online adjusting the control model, and defining and perfecting a final plate type control to meet a plate type preset value by controlling the roller system proportion, the roller system size proportion, the roller system convexity proportion and the roller system using management and control and a rolling process on the basis of the step one;
the main roll system of the twenty-roll 5-ruler ultra-wide ultra-thin precise stainless steel strip rolling mill is composed of 2 working rolls, 4 intermediate driving rolls, 2 intermediate idler rolls and 8 supporting rolls in a matching way;
the diameters of the working rolls are 64-70mm, the diameters of the first intermediate roll are 114-116mm, the diameters of the driving rolls of the second intermediate roll are 195-198mm, the diameters of the second intermediate idler roll are 203-205mm, and the diameters of the supporting rolls are 297-300mm;
the roll system is controlled, the fatigue degree of the roll system is reduced by making a period, the service life of the roll system is prolonged, the roll system is replaced under 9 times of rolling of the working roll, 30 rolls of the first intermediate roll are replaced, 7 days of time of rolling of the second intermediate roll are replaced, and 10 days of time of rolling of the supporting roll are replaced.
2. The five-ruler ultra-wide ultra-thin precision stainless steel strip cold rolling plate type control method is characterized in that: and step two, the convexity ratio of the roller system is mainly controlled by convexity and taper of a middle roller and a middle idler roller, the taper of the middle roller is 0.5mm, the taper length of the middle roller is 260mm, the taper of the second section is 0.05mm, the taper length of the middle roller is 120mm, and the convexity of the middle idler roller is 0.2mm up and down respectively.
3. The five-ruler ultra-wide ultra-thin precision stainless steel strip cold rolling plate type control method is characterized in that: in the second step, the rolling process limitation is used for optimizing the control plate type by limiting the reduction, speed and tension limitation of the discharge pass, when the thickness of the finished product is larger than 2.0mm, the reduction speed of the discharge pass is less than 200m/min, the reduction speed of the rolling is less than 4.5%, the tension is 500KN, when the thickness of the finished product is 1.5mm-2.0mm, the reduction speed of the discharge pass is less than 400m/min, the reduction speed of the discharge pass is less than 6%, the tension is 440KN, when the thickness of the finished product is 1.0mm-1.5mm, the reduction speed of the discharge pass is less than 450m/min, the reduction speed of the discharge pass is less than 9%, the tension is 360KN, when the thickness of the finished product is less than 1.0mm, the discharge pass is not limited, the reduction speed of the discharge pass is less than 10%, and the tension is less than 250 KN.
4. The five-ruler ultra-wide ultra-thin precision stainless steel strip cold rolling plate type control method is characterized in that: the second step is to match the size of the roller system, the diameter of the root working roller is 67mm, the diameter of the first intermediate roller is 115mm, the diameter of the second intermediate roller driving roller is 196mm, the diameter of the second intermediate idler roller is 204mm, and the diameter of the supporting roller is 298mm.
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