CN114653759B - Hot rolled strip steel width adjusting device and method based on rolling force control - Google Patents
Hot rolled strip steel width adjusting device and method based on rolling force control Download PDFInfo
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- CN114653759B CN114653759B CN202210347723.3A CN202210347723A CN114653759B CN 114653759 B CN114653759 B CN 114653759B CN 202210347723 A CN202210347723 A CN 202210347723A CN 114653759 B CN114653759 B CN 114653759B
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- 238000005096 rolling process Methods 0.000 title claims abstract description 143
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 106
- 239000010959 steel Substances 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims description 134
- 239000010720 hydraulic oil Substances 0.000 claims description 35
- 238000010079 rubber tapping Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 5
- 210000003739 neck Anatomy 0.000 description 11
- 230000008859 change Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000003079 width control Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/08—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-force
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Abstract
The invention discloses a hot rolled strip steel width adjusting device and method based on rolling force control in the field of plate detection, wherein a strip steel width detecting device detects the actually measured strip steel width, compares the actually measured strip steel width with the standard strip steel width, when the actually measured strip steel width is smaller than the standard strip steel width, a hydraulic transmission system simultaneously reduces the oil pressure in four first oil cylinders, releases a locking mechanism, then increases the oil pressure in two second oil cylinders, and two second pistons simultaneously push out to drive a sliding block to move downwards so as to drive an upper roller to press downwards, thereby increasing the rolling force: when the actually measured strip steel width is larger than the standard strip steel width, the hydraulic transmission system simultaneously reduces the oil pressure in the four first oil cylinders, releases the locking mechanism, simultaneously reduces the oil pressure in the two second oil cylinders, and brings the two sliding blocks and the upper roller to move upwards, so that the rolling force is reduced; the invention can limit the position of the roller, adjust the corresponding rolling force according to the width value of the strip steel, and ensure the dimensional accuracy of the width of the hot rolled strip steel in the whole process.
Description
Technical Field
The invention belongs to the technical field of plate shape detection, and particularly relates to a device and a method for adjusting the width of hot rolled strip steel.
Background
In the rolling process, the width of the strip steel is an important product quality control index such as the rolling process, thickness, convexity, flatness and the like, and in the actual production process, the width of the hot rolled strip steel is mainly controlled by the rough rolling process, but the stability of the rolling process is not high, the precision control level is limited, and further, the defect rate of the width of the hot rolled strip steel is high due to the fact that the precision of the width of a finished product of the hot rolled strip steel is poor, the use quality of the strip steel is seriously affected, and the strip steel is difficult to control due to the fact that environmental factors such as severe vibration, water vapor, cooling water, high temperature and the like are added in the hot rolling process.
In order to improve the accuracy of the width of the hot rolled strip, two methods are currently used: firstly, a method for controlling the width according to the temperature change comprises the following steps: and secondly, comparing the actual width with model predictive calculation data. The first method comprises the steps of firstly, calculating a temperature coefficient by establishing a temperature change model in the strip steel hot rolling process, obtaining a temperature predicted value by combining a temperature reference value and a temperature correction value, obtaining a real-time change value of the strip steel width, then comparing to obtain a strip steel width feedback deviation value, and adjusting the tension of a stand roller by combining the real-time change value of the strip steel width and the strip steel width feedback deviation value to complete the control of the strip steel width; the method for controlling the width of the strip steel by collecting the temperature change in the rolling process does not consider the influence of the temperature change of the rolling working environment, has very high requirements on the rolling working environment and is not suitable for the current situation of actual production. The second method is that a width measuring device is additionally arranged at the front and the rear of the rolling equipment, the width values of strip steel before and after rolling are collected in real time, the data are transmitted to a model system, the model system compares the actually collected width data with predicted data calculated by model prediction, and then the width is corrected; the control method has the following problems: the disturbance of the width of the hot rolled strip steel is large, so that a certain amount of defective strip steel is caused, and the width of qualified strip steel in the whole rolling process cannot be ensured.
Disclosure of Invention
The invention aims to solve the problem of inaccurate strip steel width control in the existing hot rolled strip steel process, and provides a hot rolled strip steel width adjusting device based on rolling force control, which has the advantages of simple structure, high response speed and stability, and can monitor the strip steel width in real time. The invention also provides a strip steel width adjusting method of the device, and the strip steel width is controlled by controlling the rolling force in the whole process.
In order to achieve the purpose, the hot rolled strip width adjusting device based on rolling force control adopts the following specific technical scheme: the rolling force adjusting device consists of a lifting mechanism, a locking mechanism and a hydraulic transmission system; the lifting mechanism comprises a sliding block, sliding rails, a second oil cylinder and a second piston, wherein the two ends of the upper rollers of the two rolling mills are respectively penetrated in a through hole of one sliding block, the upper sections of the racks of the two rolling mills are provided with the sliding rails, and each sliding block can move up and down along a corresponding sliding rail; a second oil cylinder is arranged above each sliding block, the output end of the second oil cylinder is a second piston which is vertically downward, and the second piston is fixedly connected with the upper part of each sliding block; the front side and the rear side of each sliding block are respectively provided with a locking mechanism, each locking mechanism consists of a first oil cylinder and a first piston, the first oil cylinders 1 are horizontally arranged front and back and are fixedly connected with the frame, the output ends of the first oil cylinders are first pistons, and the first pistons can be pressed on the sliding blocks after extending out; the pressure sensor is arranged below the lower roll neck of the two-roll mill; the hydraulic transmission system can control the increase or decrease of the oil pressure in the second oil cylinders and the first oil cylinders; the pressure sensor, the strip steel width detection device and the hydraulic transmission system are all connected with the control system.
Further, the hydraulic transmission system comprises a first pressure control valve, a second pressure control valve, a first electromagnetic overflow valve, a second electromagnetic overflow valve, a filter, an oil tank, hydraulic oil, a strainer and a booster pump, wherein the first pressure control valve, the first electromagnetic overflow valve, the second pressure control valve, the second electromagnetic overflow valve and the booster pump are all connected with the control system through control lines, hydraulic oil is filled in the oil tank, the strainer and the booster pump are arranged in the hydraulic oil, the strainer is connected with the input end of the booster pump through an oil pipe, the output end of the booster pump is connected with the input end of the filter, the output end of the filter is connected with two oil paths in a tapping mode, the first oil paths are respectively connected with the first pressure control valve and the first electromagnetic overflow valve, and the first pressure control valve is respectively connected with four first oil cylinders; the second oil way is respectively connected with a second pressure control valve and a second electromagnetic overflow valve, the second pressure control valve is respectively connected with two second oil cylinders, and the second electromagnetic overflow valve is connected with the oil tank.
The strip steel width adjusting method of the hot rolled strip steel width adjusting device adopts a technical scheme that the method comprises the following steps:
step 1): the control system calculates a standard rolling force P according to the performance parameters of the strip steel and the performance parameters of the two-roller mill;
step 2): when the upper roller and the lower roller of the two-roller mill roll strip steel, the strip steel width detection device detects the actually measured strip steel width B M The control system measures the width B of the strip steel M Comparing with the standard strip steel width B;
step 3): when comparing the measured strip width B M When the width of the hydraulic transmission system is smaller than the width B of the standard strip steel, the hydraulic transmission system simultaneously reduces the oil pressure in the four first oil cylinders, and releases the locking mechanism; increasing oil pressure in the two second oil cylinders, pushing out the two second pistons simultaneously to drive the sliding blocks to move downwards, further driving the upper rollers to press downwards, and increasing rolling force; at the same time, the pressure sensor will detect the real-time rolling force P M The control system compares the real-time rolling force P M And the standard rolling force P is equal to the standard rolling force P, and the rolling force is stopped increasing until the standard rolling force P is equal to the standard rolling force P:
step 4): when comparing the measured strip width B M When the width of the hydraulic transmission system is larger than the width B of the standard strip steel, the hydraulic transmission system simultaneously reduces the oil pressure in the four first oil cylinders, and releases the locking mechanism; simultaneously reducing the oil pressure in the two second oil cylinders, retracting the two second pistons upwards, taking the two sliding blocks and the upper roller to move upwards, and reducing the rolling force; at the same time, control systemReal-time rolling force P M And stopping reducing the rolling force until the standard rolling force P is equal to the standard rolling force P.
The strip steel width adjusting method of the hot rolled strip steel width adjusting device adopts another technical scheme that the method comprises the following steps:
step A): the control system calculates standard rolling force P according to the performance parameters of the strip steel and the performance parameters of the two-roller mill, and controls the first pressure control valve, the second pressure control valve, the first electromagnetic overflow valve and the second electromagnetic overflow valve to be closed, the locking mechanism locks the sliding block, and the booster pump does not work;
step B): when the upper roller and the lower roller of the two-roller mill roll strip steel, the strip steel width detection device detects the actually measured strip steel width B M The control system measures the width B of the strip steel M Comparing with the standard strip steel width B;
step C): when comparing the measured strip width B M When the width of the strip steel is smaller than the width B of the standard strip steel, the following steps are continued:
step C1): opening the first pressure control valve and the first electromagnetic relief valve, retracting the first piston, simultaneously loosening the four locking mechanisms, and closing the first pressure control valve and the first electromagnetic relief valve;
step C2): opening a booster pump, a second pressure control valve and a second electromagnetic overflow valve, increasing oil pressure in a second oil cylinder, pushing out two second pistons simultaneously, and enabling a sliding block to move downwards so as to increase rolling force;
step C3): the pressure sensor will detect the real-time rolling force P M Transmitting the rolling force P to a control system, wherein the control system compares the real-time rolling force P M And the standard rolling force P is equal to the standard rolling force P, and the second pressure control valve and the second electromagnetic overflow valve are closed;
step C4): the first pressure control valve and the first electromagnetic overflow valve are opened, hydraulic oil enters four first oil cylinders, and four first pistons are pushed out simultaneously to lock the sliding blocks;
step D): when comparing the measured strip width B M When the width of the strip steel is larger than the width B of the standard strip steel, the following steps are continued:
step D1): the first pressure control valve and the first electromagnetic overflow valve are controlled to be opened, the four first pistons retract simultaneously, and after the locking mechanism is released, the first pressure control valve and the first electromagnetic overflow valve are closed;
step D2): the second pressure control valve and the second electromagnetic overflow valve are opened, the oil pressure in the two second oil cylinders is reduced simultaneously, the two second pistons are brought to the two sliding blocks and the upper roller to move upwards, and the rolling force is reduced;
step D3): the pressure sensor will detect the real-time rolling force P M Transmitting the rolling force P to a control system, wherein the control system compares the real-time rolling force P M And stopping reducing the rolling force until the standard rolling force P is equal to the standard rolling force P, and closing the second pressure control valve and the second electromagnetic overflow valve;
step D4): and opening the first pressure control valve and the first electromagnetic overflow valve, opening the booster pump, increasing the oil pressure in the four first oil cylinders simultaneously, pushing out the four first pistons simultaneously, and locking the sliding blocks.
The invention has the advantages after adopting the technical scheme that: the invention can detect and adjust the rolling force in real time, limit the position of the roller, adjust the corresponding rolling force according to the width value of the strip steel, cooperatively control the rolling force and the strip steel width, ensure the dimensional accuracy of the width of the hot rolled strip steel in the whole process and further improve the rolling quality of the strip steel.
Drawings
The invention is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a schematic diagram showing the overall structure of a hot-rolled strip width adjusting apparatus based on rolling force control according to the present invention;
fig. 2 is an enlarged cross-sectional view of the lifting mechanism and locking mechanism embodied in the rolling force adjustment device 3 of fig. 1;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic diagram of a hydraulic drive system for controlling the lift mechanism and locking mechanism;
FIG. 5 is a schematic view showing a specific installation structure of the pressure sensor 17 in FIG. 1;
FIG. 6 is an enlarged cross-sectional view of the strip width detection apparatus 4 of FIG. 1;
reference numerals in the drawings: 1. strip steel; 2-1, upper rollers; 2-2, lower rolls; 3. a rolling force adjusting device; 4. a strip steel width detection device; 5. a light source; 6-1, mounting a U-shaped fixed bracket; 6-2, a lower U-shaped fixing bracket; 7-1, upper roll neck; 7-2, lower roll neck; 8. a photosensitive sensor; 9. a frame; 10. a base; 11-1, a first oil cylinder; 11-2, a second oil cylinder; 12-1, a first piston; 12-2, a second piston; 13. a slide rail; 14-1, 14-2. Bearings; 15-1, 15-2, bearing seats; 16. a slide block; 17. a pressure sensor; 19. an oil pipe; 20-1, a first pressure control valve; 20-2. A second pressure control valve; 21-1, a first electromagnetic spill valve; 21-2, a second electromagnetic spill valve, 22, a filter; 23. an oil tank; 24. hydraulic oil; 25. a strainer; 26. a booster pump; 32. and a control system.
Detailed Description
The structural orientation of the hot rolled strip width adjusting device based on rolling force control is specified as follows: as shown in fig. 1, the position of the upper roll 2-1 is "up", the position of the lower roll 2-2 is "down", the central axis direction of the upper roll 2-1 and the lower roll 2-2 is the horizontal direction, that is, the width direction of the strip 1 is also the horizontal direction, and the moving direction of the strip 1 is the horizontal direction.
As shown in fig. 1 and 2, the hot rolled strip width adjusting apparatus according to the present invention based on rolling force control is installed on two rolling mills including a stand 9, an upper roll 2-1 and a lower roll 2-2, the upper roll 2-1 being directly above the lower roll 2-2, the upper roll 2-1 and the lower roll 2-2 being parallel to each other one by one, the upper roll 2-1 and the lower roll 2-2 being horizontally arranged left and right about the central axis thereof, a strip 1 being provided between the upper roll 2-1 and the lower roll 2-2, the strip 1 passing from front to back through a gap between the upper roll 2-1 and the lower roll 2-2. When the two rolling mills hot-roll the strip steel 1, the roller 2-1 and the lower roller 2-2 rotate to drive the strip steel 1 to horizontally move back and forth. The left and right ends of the upper roller 2-1 and the lower roller 2-2 are respectively rotatably connected with a frame 9, the two frames 9 are symmetrically arranged left and right, and the upper roller 2-1 and the lower roller 2-2 are positioned between the frames 9 which are symmetrically arranged left and right. The left end and the right end of the upper roller 2-1 are respectively provided with an upper roller neck 7-1, and the upper roller necks 7-1 at the two ends are respectively fixedly connected with the frame 9 through a bearing 14-1 and a bearing seat 15-1, so that the upper roller 2-1 can rotate along the central shaft of the upper roller. The left end and the right end of the lower roller 2-2 are respectively provided with a lower roller neck 7-2, and the lower roller necks 7-2 at the two ends are respectively fixedly connected with the frame 9 through a bearing 14-2 and a corresponding bearing seat 15-2, so that the lower roller 2-2 can rotate along the central shaft of the lower roller. The left and right side frames 9, the bottom of one side frame 9 is fixedly connected to one side base 10, and the structures of the two side frames 9 and the two side bases 10 are identical.
The hot rolled strip width adjusting device based on rolling force control comprises a rolling force adjusting device 3, a pressure sensor 17, a strip width detecting device 4 and a control system 32. The rolling force adjusting device 3 consists of a lifting mechanism, a locking mechanism and a hydraulic transmission system.
As shown in fig. 2 and 3, the lifting mechanism includes a slider 16, a slide rail 13, a second cylinder 11-2 and a second piston 12-2. The second oil cylinder 11-2 is connected with the hydraulic transmission system and is controlled to work by the hydraulic transmission system. The upper sections of the racks 9 on the two sides are provided with a square groove which is penetrated left and right, the top opening of the square groove is opened, the front side and the rear side of the square groove are respectively provided with a sliding rail 13, and the length direction of the sliding rail 13 is vertical, and the sliding rails are vertically arranged. A rectangular slide 16 is provided in each square groove, so that there are two slides 16 in total. The front side and the rear side of the sliding block 16 are respectively in sliding fit with one sliding rail 13 on the same side, and are connected with the frame 9 through the sliding rail 13, and the sliding block 16 can vertically move up and down along the sliding rail 13 matched with the sliding block, so that up and down displacement is generated relative to the frame 9.
In order to stably move the rectangular sliding block 16, the horizontal section of the sliding rail 13 is designed into a U shape, the U-shaped opening faces the sliding block 16, two side walls of the U shape are left and right, the bottom surface of the U shape and the two side walls of the U shape form a sliding surface, the sliding block 16 is just positioned between the U-shaped openings of the sliding rail 13, the left and right width of the sliding block 16 is equal to the left and right width of the U-shaped opening, and the front side surface and the rear side surface of the sliding block 16 are respectively in sliding fit with one sliding rail 13. In this way, the slider 16 is ensured not to move forward and backward and left and right with respect to the slide rail 13 while the slider 16 moves up and down along the slide rail 13.
The middle of each slide block 16 is provided with a through hole which penetrates left and right and is used for installing an upper roll neck 7-1, a bearing 14-1 and a bearing seat 15-1 in the upper roll 2-1. In this way, the upper roller 2-1 is connected with the frame 9 through the bearing 14-1, the bearing seat 15-1, the sliding block 16 and the sliding rail 13 in sequence, and when the sliding block 16 moves up and down, the upper roller neck 7-1 is driven to move synchronously.
Above each frame 9 and also above each slide 16, there is provided one second cylinder 11-2 each, and there are two second cylinders 11-2 in total. The second cylinder 11-2 is vertically arranged, the output end of the second cylinder is a vertically downward second piston 12-2, and the second cylinder 11-2 is fixedly connected with the upper part of the sliding block 16 through the second piston 12-2. When the pressure of hydraulic oil in the second oil cylinder 11-2 is increased, the second piston 12-2 is pushed out downwards to drive the sliding block 16 to move downwards, so that the upper roller 2-1 simultaneously generates the same displacement downwards, and the rolling force is increased; when the hydraulic oil pressure in the second cylinder 11-2 is reduced, the upper roll 2-1 moves upward under the reaction of the rolling force, so that the slider 16 is driven to move upward, and thus the rolling force is adjusted by the upward and downward movement of the upper roll 2-1.
A locking mechanism is respectively arranged at the front side and the rear side of each sliding block 16, the locking mechanism consists of a first oil cylinder 11-1 and a first piston 12-1, four locking mechanisms are provided, and four first oil cylinders 11-1 and first pistons 12-1 are correspondingly arranged. Each first oil cylinder 11-1 is horizontally arranged front and back, the shell of the first oil cylinder 11-1 is fixedly connected with the frame 9 and can be fixedly embedded in the frame 9, and each first oil cylinder 11-1 is connected with the hydraulic transmission system and is controlled to work by the hydraulic transmission system. The output end of the first oil cylinder 11-1 is a first piston 12-1 which is horizontal back and forth, and the first piston 12-1 can contact with the sliding block 16 to press on the sliding block 16 after penetrating through the frame 9, so that the sliding block 16 is prevented from moving. When the hydraulic oil pressure in the first cylinder 11-1 increases, the first piston 12-1 is pushed out toward the slider 16, and the first piston 12-1 is pushed out toward the slider 16 while pushing against the slider 16, so that the position of the slider 16 is more stable.
The hydraulic transmission system is shown in fig. 4, and comprises a first pressure control valve 20-1, a second pressure control valve 20-2, a first electromagnetic relief valve 21-1, a second electromagnetic relief valve 21-2, a filter 22, an oil tank 23, an oil pipe 19, hydraulic oil 24, a strainer 25 and a booster pump 26. Wherein, the first pressure control valve 20-1, the first electromagnetic relief valve 21-1, the second pressure control valve 20-2, the second electromagnetic relief valve 21-2 and the booster pump 26 are all connected with the control system 32 through control lines, and the control system 32 controls the hydraulic transmission system to work.
The oil tank 23 is filled with hydraulic oil 24, a strainer 25 and a booster pump 26 are arranged in the hydraulic oil 24, and the strainer 25 is connected with the input end of the booster pump 26 through an oil pipe 19. The output end of the booster pump 26 is connected with the input end of the filter 22, the output end of the filter 22 is connected with two oil ways in a tapping way, the first oil way is that the filter 22 is respectively connected with the first pressure control valve 20-1 and the first electromagnetic overflow valve 21-1 through the oil pipe 19, the first pressure control valve 20-1 is respectively connected with four first oil cylinders 11-1 (only one of the first oil cylinders 11-1 is shown in fig. 4), oil is supplied to the four first oil cylinders 11-1 at the same time, the oil pressure in the two first oil cylinders 11-1 is controlled, and the first electromagnetic overflow valve 21-1 is connected with the oil tank 23 for oil return. The second oil path is that the filter 22 is respectively connected with the second pressure control valve 20-2 and the second electromagnetic relief valve 21-2 through the oil pipe 19, the second pressure control valve 20-2 is respectively connected with two second oil cylinders 11-2 (only one of the second oil cylinders 11-2 is shown in fig. 4), oil is simultaneously supplied to the two second oil cylinders 11-2, the oil pressure in the second oil cylinders 11-2 is controlled, the second electromagnetic relief valve 21-2 is connected with the oil tank 23 for oil return, and thus an oil supply pipe and an oil return pipe of the second oil cylinders 11-2 are respectively formed.
If the hydraulic oil 24 does not need to be filtered, a strainer 25 and a filter 22 are not needed, and the output end of the booster pump 26 is directly connected with two oil paths in a tapping mode.
When the control system 32 controls the booster pump 26 to work, the hydraulic oil 24 in the oil tank 23 is pumped, the hydraulic oil 24 is filtered for the first time through the strainer 25 to filter out coarse particle impurities such as metal scraps, dust and sludge, and the like, then the hydraulic oil 24 enters the filter 22 through the oil pipe 19 to be filtered for the second time to filter turbid liquid such as oil, water and the like, clean hydraulic oil 24 is obtained after the two times of filtering, then the hydraulic oil enters the two second oil cylinders 11-2 through the oil pipe 19 at the same time through the second pressure control valve 20-2, the hydraulic oil 24 which does not flow into the second pressure control valve 20-2 flows back into the oil tank 23 through the second electromagnetic overflow valve 21-2, the pressure of the hydraulic oil 24 in the second oil cylinder 11-2 is increased, the second piston 12-2 is pushed out to drive the sliding block 16 to move downwards, and then the upper roller 2-1 is driven to press downwards, and the purpose of increasing rolling force is achieved. When the rolling force needs to be reduced, the booster pump 26 stops working, the pressure of the hydraulic oil 24 in the second oil cylinder 11-2 is reduced, and the upper roll 2-1 drives the left and right sliding blocks 16 to move upwards under the reaction of the rolling force, so that the purpose of reducing the rolling force is realized.
When the slide block 16 needs to be fixed, the booster pump 26 works, the hydraulic oil 24 in the oil tank 23 is pumped, the hydraulic oil 24 sequentially passes through the strainer 25, the filter 22 and the first pressure control valve 20-1 and then simultaneously enters the four first oil cylinders 11-1, the hydraulic oil 24 which does not flow into the first pressure control valve 20-1 flows back to the oil tank 23 through the first electromagnetic overflow valve 21-1, the pressure of the hydraulic oil 24 in the four first oil cylinders 11-1 is simultaneously increased, and the four first pistons 12-1 are simultaneously pushed out to push against the two slide blocks 16, so that the position of the slide block 16 is stabilized. When it is necessary to unclamp the slider 16, the booster pump 26 is stopped, the pressure of the hydraulic oil 24 in the first cylinder 11-1 is reduced, and the interaction of the first piston 12-1 with the slider 16 is reduced.
Referring to fig. 1 and 5, a pressure sensor 17 is provided below the lower roll neck 7-2, and a pressure sensor 17 is provided below each of both ends of the lower roll neck 7-2 for detecting the magnitude of the rolling force. As shown in fig. 5, the pressure sensor 17 is installed below the bearing housing 15-2, in direct contact with the bearing housing 15-2 to collect rolling force. The pressure sensor 17 is connected to the control system 32 via a signal line, and transmits the detected rolling force to the control system 32.
As shown in fig. 1 and 6, the strip width measuring device 4 includes a light source 5 and a photosensor 8, the strip 1 passes between the light source 5 and the photosensor 8, and the light source 5 is directly above the photosensor 8. The light source 5 is fixedly connected with the frame 9 through the upper U-shaped fixing support 6-1, and the photosensitive sensor 8 is fixedly connected with the frame 9 through the lower U-shaped fixing support 6-2. The light source 5 and the photosensitive sensor 8 are respectively connected with the control system 32, the control system 32 controls the light source 5 to work through a control line, when the light source 5 works and emits light, the part of the photosensitive sensor 8 covered by the strip steel 1 is not illuminated, the photosensitive sensor 8 which receives the light transmits the detected information to the control system 32, and the control system 32 calculates the width of the strip steel 1 through processing operation analysis.
Referring to fig. 1-6, the control system 32 controls the hydraulic transmission system to work according to actual rolling working conditions, cooperates with the lifting mechanism and the locking mechanism, and realizes accurate adjustment of the width of the strip steel in the hot rolling process, and the specific adjustment process is as follows:
the control system 32 calculates a standard rolling force P in advance according to the performance parameters of the strip steel 1 to be rolled and the performance parameters of the two-roller mill shown in FIG. 1, wherein the performance parameters of the strip steel 1 comprise a standard strip steel width B and strip steel deformation resistance K of the strip steel 1 to be rolled; the performance parameters of the two-roller mill comprise the contact arc length l after the roller is flattened c Coefficient of influence Q of stress state caused by friction force on contact arc after roller flattening p And then combining the rolling force influence coefficient K T I.e. the coefficient of influence of the tensile stress in front and back on the rolling force. The calculation formula of the standard rolling force P is: p=bl c Q p KK T 。
The initial state of the hot rolled strip width adjusting device provided by the invention is as follows: the first pressure control valve 20-1, the second pressure control valve 20-2, the first electromagnetic spill valve 21-1 and the second electromagnetic spill valve 21-2 are all closed, the corresponding slide blocks 16 are locked by the four locking mechanisms, and the booster pump 26 does not work.
The two-roller mill is started, the upper roller 2-1 and the lower roller 2-2 rotate simultaneously, and the rolling of the strip steel 1 is started. The hot rolled strip width adjusting device of the invention works, the control system 32 controls the strip width detecting device 4 to work, and the strip width detecting device 4 detects the width B of the strip in real time M And the measured strip width B M Is fed back to the control system 32, and the measured strip width B is fed back to the control system 32 M Compared with the standard strip width B, the comparison result has the following three conditions:
first case: when the control system 32 compares the measured strip width B M When the width of the strip steel is equal to the width B of the standard strip steel, the width of the strip steel does not need to be adjusted.
Second case:
when the control system 32 compares the measured strip steelWidth B M When the rolling force is smaller than the standard strip steel width B, the rolling force adjusting device 3 is controlled to work, the locking mechanism is firstly released, and then the rolling force is increased until the strip steel width B is actually measured M Equal to the standard strip width B. The method specifically comprises the following steps:
the first pressure control valve 20-1 and the first electromagnetic spill valve 21-1 are opened, the first piston 12-1 is retracted, the pressures in the four first cylinders 11-1 are simultaneously reduced, the interaction force of the four first pistons 12-1 with the two sliders 16 is reduced, and thus the four lock mechanisms are simultaneously released. After the lock mechanism is released, first pressure control valve 20-1 and first electromagnetic spill valve 21-1 are closed.
The booster pump 26 and the second pressure control valves 20-2 and the second electromagnetic spill valve 21-2 are opened, the booster pump 26 sucks the hydraulic oil 24 in the oil tank 23, the hydraulic oil 24 flows through the second pressure control valves 20-2 into the two second cylinders 11-2, and the hydraulic oil 24 that does not flow into the second pressure control valves 20-2 flows back into the oil tank 23 through the second electromagnetic spill valve 21-2. The oil pressure in the second oil cylinder 11-2 is increased, and the two second pistons 12-2 are pushed out simultaneously to drive the sliding block 16 to move downwards, so that the upper roller 2-1 is driven to press downwards, and the rolling force is increased.
While increasing the rolling force, the pressure sensor 17 detects the magnitude of the rolling force in real time and detects the real-time rolling force P M To the control system 32. The control system 32 compares the real-time rolling force P M And the standard rolling force P until the two are equal, namely P M ＝P。
When P M When P, increase of rolling force is stopped: the control system 32 closes the second pressure control valve 20-2 and the second electromagnetic spill valve 21-2, ensuring that the oil pressure inside the second cylinder 11-2 is constant.
Then, the locking mechanism is locked again: the control system 32 controls the first pressure control valve 20-1 and the first electromagnetic spill valve 21-1 to open again, the booster pump 26 continues to operate, the hydraulic oil 24 enters the four first cylinders 11-1, and the hydraulic oil 24 that has not flowed into the first pressure control valve 20-1 flows back to the tank 23 through the first electromagnetic spill valve 21-1. At this time, the oil pressures in the four first cylinders 11-1 are simultaneously increased, and the four first pistons 12-1 are simultaneously pushed out while pushing against the slider 16, locking the slider 16.
After the sliding block 16 is locked, the control system 32 controls the first pressure control valve 20-1 and the first electromagnetic overflow valve 21-1 to be closed again, the booster pump 26 stops working, the oil pressure inside the four first oil cylinders 11-1 is ensured to be constant, the rolling force is further ensured to be unchanged under the working condition, and the device is restored to the initial state.
Third case:
when the control system 32 compares the measured strip width B M When the rolling force is larger than the standard strip steel width B, the rolling force adjusting device 3 works, and the locking mechanism is firstly released and then the rolling force is reduced until the strip steel width B is actually measured M Equal to the standard strip width B.
The method specifically comprises the following steps:
the control system 32 controls the first pressure control valve 20-1 and the first electromagnetic spill valve 21-1 to be opened, the four first pistons 12-1 are retracted simultaneously, the oil pressure in the four first cylinders 11-1 is reduced, the interaction force between the first pistons 12-1 and the slide 16 is reduced, the up-and-down movement of the slide 16 is not affected, and the slide 16 is released. After the lock mechanism is released, first pressure control valve 20-1 and first electromagnetic spill valve 21-1 are closed.
After releasing the locking mechanism, the rolling force adjusting device 3 reduces the rolling force: the control system 32 controls the second pressure control valve 20-2 and the second electromagnetic spill valve 21-2 to open, the oil pressure in the two second cylinders 11-2 is simultaneously reduced, the two second pistons 12-2 retract upward under the reaction force, the two slides 16 and the upper roll 2-1 are brought up, and the rolling force becomes smaller.
The pressure sensor 17 detects the magnitude of the rolling force in real time while the rolling force becomes smaller, and detects the real-time rolling force P M To the control system 32. The control system 32 compares the real-time rolling force P M And the standard rolling force P until the two are equal, namely P M ＝P。
When P M When P, the reduction of the rolling force is stopped: the control system 32 controls the second pressure control valve 20-2 and the second electromagnetic spill valve 21-2 to be closed, ensuring constant oil pressure inside the two second cylinders 11-2.
Then, the locking mechanism is locked again: the first pressure control valve 20-1 and the first electromagnetic overflow valve 21-1 are opened, the booster pump 26 is opened simultaneously, hydraulic oil 24 enters the four first oil cylinders 11-1 simultaneously, oil pressure in the four first oil cylinders 11-1 is increased simultaneously, and the four first pistons 12-1 are pushed out simultaneously to push against the sliding block 16, so that the position of the sliding block 16 is more stable.
After the sliding block 16 is locked, the control system 32 controls the first pressure control valve 20-1 and the first electromagnetic relief valve 21-1 to be closed, so that the constant oil pressure in the four first oil cylinders 11-1 is ensured, the booster pump 26 is stopped, and the rolling force is further ensured to be unchanged under the working condition. The device of the invention is restored to the original state.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the present invention uses more of the reference numerals in the figures, the use of other terms is not precluded. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (9)
1. The utility model provides a hot rolled strip width adjusting device based on rolling force control, its by rolling force adjusting device (3), pressure sensor (17), belted steel width detection device (4) and control system (32) are constituteed, characterized by:
the rolling force adjusting device (3) consists of a lifting mechanism, a locking mechanism and a hydraulic transmission system;
the lifting mechanism comprises a sliding block (16), a sliding rail (13), a second oil cylinder (11-2) and a second piston (12-2), wherein the two ends of the upper rollers of the two rolling mills are respectively penetrated in a through hole of one sliding block (16), the upper section of a rack of the two rolling mills is provided with the sliding rail (13), and each sliding block (16) can move up and down along the corresponding sliding rail (13); a second oil cylinder (11-2) is arranged above each sliding block (16), the output end of the second oil cylinder (11-2) is a vertically downward second piston (12-2), and the second piston (12-2) is fixedly connected with the upper part of each sliding block (16);
the front side and the rear side of each sliding block (16) are respectively provided with a locking mechanism, each locking mechanism consists of a first oil cylinder (11-1) and a first piston (12-1), the first oil cylinders (11-1) are horizontally arranged front and back and are fixedly connected with the frame, the output end of each first oil cylinder (11-1) is provided with a first piston (12-1), and the first pistons (12-1) can be pressed on the sliding blocks (16) after extending out;
the pressure sensor (17) is arranged below the lower roll neck of the two-roll mill; the two second cylinders (11-2) and the four first cylinders (11-1) are connected with the hydraulic transmission system, and the hydraulic transmission system can control the increase or decrease of the oil pressure in the second cylinders (11-2) and the first cylinders (11-1); the pressure sensor (17), the strip steel width detection device (4) and the hydraulic transmission system are all connected with the control system (32).
2. The rolling force control-based hot rolled strip width adjustment device according to claim 1, characterized in that: the hydraulic transmission system comprises a first pressure control valve (20-1), a second pressure control valve (20-2), a first electromagnetic overflow valve (21-1), a second electromagnetic overflow valve (21-2), an oil tank (23) and a booster pump (26), wherein the first pressure control valve (20-1), the first electromagnetic overflow valve (21-1), the second pressure control valve (20-2), the second electromagnetic overflow valve (21-2) and the booster pump (26) are all connected with a control system (32) through control lines, hydraulic oil is contained in the oil tank (23), the booster pump (26) is arranged in the hydraulic oil, the output end of the booster pump (26) is connected with two oil ways, the first oil way is respectively connected with the first pressure control valve (20-1) and the first electromagnetic overflow valve (21-1), and the first pressure control valve (20-1) is respectively connected with four first oil cylinders (11-1); the second oil way is respectively connected with a second pressure control valve (20-2) and a second electromagnetic overflow valve (21-2), the second pressure control valve (20-2) is respectively connected with two second oil cylinders (11-2), and the second electromagnetic overflow valve (21-2) is connected with an oil tank (23).
3. The rolling force control-based hot rolled strip width adjustment device according to claim 2, characterized in that: the hydraulic oil (24) is also provided with a strainer (25), the strainer (25) is connected with the input end of a booster pump (26) through an oil pipe, the output end of the booster pump (26) is connected with the input end of a filter (22), and the output end of the filter (22) is connected with the two oil paths in a tapping mode.
4. The rolling force control-based hot rolled strip width adjustment device according to claim 1, characterized in that: the strip steel width detection device (4) comprises a light source (5) and a photosensitive sensor (8), strip steel is penetrated between the light source (5) and the photosensitive sensor (8), the light source (5) is arranged right above the photosensitive sensor (8), and the light source (5) and the photosensitive sensor () are respectively connected with a control system (32).
5. The rolling force control-based hot rolled strip width adjustment device according to claim 1, characterized in that: the horizontal cross section of slide rail (13) be the U-shaped, U-shaped opening is towards slider (16), two lateral walls of U-shaped are a left side and a right side, the bottom surface of U-shaped and two lateral walls of U-shaped form the sliding surface, slider (16) sliding fit is between the U-shaped opening of slide rail (13) and the width about slider (16) equals the width about U-shaped opening.
6. The rolling force control-based hot rolled strip width adjustment device according to claim 1, characterized in that: the upper section of frame open and have a left and right sides square groove that link up, the top of square groove is opened, the front side of square groove and rear side respectively be equipped with one slide rail (13), the length direction of slide rail (13) is the upper and lower direction, all is equipped with one in the middle of the inside of every square groove slider (16), the leading flank and the trailing flank of slider (16) respectively with a slide rail (13) sliding fit of same side.
7. A method for adjusting a hot rolled strip width adjusting apparatus based on rolling force control as claimed in claim 1, characterized by comprising the steps of:
step 1): the control system (32) calculates a standard rolling force P according to the performance parameters of the strip steel and the performance parameters of the two-roller mill;
step 2): when the upper roller and the lower roller of the two-roller mill roll strip steel, the strip steel width detection device (4) detects the actually measured strip steel width B M The control system (32) measures the width B of the strip steel M Comparing with the standard strip steel width B;
step 3): when comparing the measured strip width B M When the width of the hydraulic transmission system is smaller than the width B of the standard strip steel, the hydraulic transmission system simultaneously reduces the oil pressure in the four first oil cylinders (11-1) and releases the locking mechanism; the oil pressure in the two second oil cylinders (11-2) is increased, and the two second pistons (12-2) are pushed out simultaneously to drive the sliding block (16) to move downwards, so that the upper roller is driven to press downwards, and the rolling force is increased; at the same time, the pressure sensor (17) will detect the real-time rolling force P M The control system (32) compares the real-time rolling force P M And the standard rolling force P is equal to the standard rolling force P, and the rolling force is stopped increasing until the standard rolling force P is equal to the standard rolling force P:
step 4): when comparing the measured strip width B M When the width of the hydraulic transmission system is larger than the width B of the standard strip steel, the hydraulic transmission system simultaneously reduces the oil pressure in the four first oil cylinders (11-1) and releases the locking mechanism; simultaneously reducing the oil pressure in the two second oil cylinders (11-2), retracting the two second pistons (12-2) upwards, taking the two sliding blocks (16) and the upper roller to move upwards, and reducing the rolling force; at the same time, the control system (32) compares the real-time rolling force P M And stopping reducing the rolling force until the standard rolling force P is equal to the standard rolling force P.
8. A method for adjusting a hot rolled strip width adjusting apparatus based on rolling force control as claimed in claim 2, characterized by comprising the steps of:
step A): the control system (32) calculates a standard rolling force P according to the performance parameters of the strip steel and the performance parameters of the two-roller mill, and controls the first pressure control valve (20-1), the second pressure control valve (20-2), the first electromagnetic overflow valve (21-1) and the second electromagnetic overflow valve (21-2) to be closed, the locking mechanism locks the sliding block (16), and the booster pump (26) does not work;
step B): when the upper roller and the lower roller of the two-roller mill roll strip steel, the strip steel width detection device (4) detects the actually measured strip steel width B M The control system (32) measures the width B of the strip steel M Comparing with the standard strip steel width B;
step C): when comparing the measured strip width B M When the width of the strip steel is smaller than the width B of the standard strip steel, the following steps are continued:
step C1): the first pressure control valve (20-1) and the first electromagnetic overflow valve (21-1) are opened, the first piston (12-1) is retracted, four locking mechanisms are simultaneously released, and the first pressure control valve (20-1) and the first electromagnetic overflow valve (21-1) are closed;
step C2): opening a booster pump (26), a second pressure control valve (20-2) and a second electromagnetic overflow valve (21-2), increasing oil pressure in a second oil cylinder (11-2), pushing out two second pistons (12-2) simultaneously, and moving a sliding block (16) downwards to increase rolling force;
step C3): the pressure sensor (17) detects the real-time rolling force P M Is transmitted to a control system (32), and the control system (32) compares the real-time rolling force P M And the standard rolling force P until the standard rolling force P and the standard rolling force P are equal, closing a second pressure control valve (20-2) and a second electromagnetic overflow valve (21-2);
step C4): the first pressure control valve (20-1) and the first electromagnetic overflow valve (21-1) are opened, hydraulic oil (24) enters four first oil cylinders (11-1), and four first pistons (12-1) are pushed out simultaneously to lock the sliding block (16);
step D): when comparing the measured strip width B M When the width of the strip steel is larger than the width B of the standard strip steel, the following steps are continued:
step D1): the first pressure control valve (20-1) and the first electromagnetic overflow valve (21-1) are controlled to be opened, the four first pistons (12-1) retract simultaneously, the locking mechanism is released, and the first pressure control valve (20-1) and the first electromagnetic overflow valve (21-1) are closed;
step D2): the second pressure control valve (20-2) and the second electromagnetic overflow valve (21-2) are opened, the oil pressure in the two second oil cylinders (11-2) is reduced simultaneously, the two second pistons (12-2) are brought to the two sliding blocks (16) and the upper roller (2-1) to move upwards, and the rolling force is reduced;
step D3): the pressure sensor (17) detects the real-time rolling force P M Is transmitted to a control system (32), and the control system (32) compares the real-time rolling force P M And the standard rolling force P is stopped reducing until the standard rolling force P and the standard rolling force P are equal, and the second pressure control valve (20-2) and the second electromagnetic relief valve (21-2) are closed;
step D4): the first pressure control valve (20-1) and the first electromagnetic overflow valve (21-1) are opened, the booster pump (26) is opened, the oil pressure in the four first oil cylinders (11-1) is increased simultaneously, the four first pistons (12-1) are pushed out simultaneously, and the sliding block (16) is locked.
9. The adjustment method according to claim 8, characterized in that: in the step C4) and the step D4), after the slider (16) is locked, the first pressure control valve (20-1), the first electromagnetic spill valve (21-1), and the booster pump (26) are closed.
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