CN106734250A - A kind of system and its application method of on-line checking cold-reduced sheet skin-friction coefficient - Google Patents
A kind of system and its application method of on-line checking cold-reduced sheet skin-friction coefficient Download PDFInfo
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- CN106734250A CN106734250A CN201710004960.9A CN201710004960A CN106734250A CN 106734250 A CN106734250 A CN 106734250A CN 201710004960 A CN201710004960 A CN 201710004960A CN 106734250 A CN106734250 A CN 106734250A
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- 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
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Abstract
A kind of system of on-line checking cold-reduced sheet skin-friction coefficient, including hydraulic cylinder, coefficient of friction detection means and Process Control System；Hydraulic cylinder connection oil inlet pipe, flowline, pressure and displacement transducer；Oil inlet pipe, flowline are respectively mounted solenoid valve and switch valve；Skin-friction coefficient detection means includes working roll, backing roll, bearing block, dc generator and ammeter；Working roll is installed in 2 bearing blocks, and piston rod of the bearing block respectively with 2 hydraulic cylinders is connected；One end of working roll is connected with dc generator, and ammeter is arranged on dc generator；Process Control System includes that computer and computer meet the solenoid valve PLC and electromagnetic switch valve PLC for being connected to control hydraulic cylinder piston action, with the feedback of the information PLC that computer is connected to pressure information, piston displacement information and ammeter current information in feedback hydraulic cylinder.The present invention realizes the online detection fast and accurately to cold-reduced sheet skin-friction coefficient.
Description
Technical field
The present invention relates to a kind of system and its application method of on-line checking cold-reduced sheet skin-friction coefficient, belong to galvanizing
Production technical field.
Background technology
Generally, cold-strip steel, can be according to user to the final of product after the PROCESS FOR TREATMENT such as pickling, cold rolling, continuous annealing
It is required that, hot dip galvanizing process treatment is carried out to belt steel surface.In the practical operation link of hot dip galvanizing process, it is ensured that cold rolling plate surface
Zinc coating thickness and product quality disclosure satisfy that the key factor that user requires, be the gas pressures that rationally control air knife equipment to spray
Power is (hereinafter referred to as：Air knife) requirement of production link is disclosure satisfy that, and in process of production, operating personnel are carried out to air knife parameter
The foundation of regulation is based primarily upon：Zinc pot in zinc liquid temperature, roll plate transporting velocity, air knife equipment to cold rolling plate surface distance,
Air knife equipment and roll the surface roughness of angle and cold-reduced sheet between plate；Zinc liquid temperature information wherein in zinc pot and to roll plate defeated
Velocity information is sent preferably to realize on-line real-time measuremen at present, and air knife equipment sets to the distance of cold rolling plate surface, air knife
It is standby accurate result to be obtained by measurement in advance with the angle information rolled between plate, therefore, it is online to grasp cold-reduced sheet in real time
Surface roughness information, it is timely for site operation personnel adjustment air knife parameter, it is ensured that quality of zinc for hot galvanizing is most important.
Surface roughness is for describing rough object surfaces or smooth physical quantity, in actual production process, now
The grasp of operating personnel to cold-reduced sheet surface roughness, mainly by " coefficient of friction " parameter that has corresponding relation with it come
Realize, i.e.,：Coefficient of friction is bigger, cold-reduced sheet rougher surface；Coefficient of friction is smaller, and cold rolling plate surface is more smooth.
In the prior art the detection of cold-reduced sheet skin-friction coefficient is mainly by friction coefficient tester to realize,
Its operation principle is mainly clamps strip test specimen folder sample device, while with treating that test sample encases sliding block, then pacifying sliding block
It is placed on the hanging hole of sensor, under certain contact, moves sensor by motor belt motor carry-over bar, that is, make two
Testing surface is relatively moved, and the force signal measured by sensor amplifies by integrator, logger is sent into, so as to obtain cold-reduced sheet
Skin-friction coefficient.This detection method can obtain accurate result, but have the disadvantage can only be to the surface of cold-reduced sheet
Coefficient of friction carries out offline inspection, and detection cycle is more long, it is impossible to can online, quickly for site operation personnel provides dependency number
According to.In fact, in today of big data analytical technology successful implementation, people need not accurately grasp cold rolling plate surface and rub
The concrete outcome of coefficient is wiped, as long as will appreciate that the relative result of skin-friction coefficient between different cold-reduced sheets, it becomes possible to utilize
Computer draws the optimal result of the air knife parameter corresponding to different cold-reduced sheets.Therefore, cold rolling plate surface is quickly grasped online to rub
Coefficient is wiped, for real-time optimization, the adjustment of realizing air knife parameter, it is ensured that the quality of zinc for hot galvanizing of cold rolling plate surface has particularly significant
Meaning.
The content of the invention
The technical problems to be solved by the invention be to provide a kind of on-line checking cold-reduced sheet skin-friction coefficient system and
Its application method, the system can quick, accurate detection of the canbe used on line to cold-reduced sheet skin-friction coefficient, be adjustment galvanizing
Air knife parameter provides foundation, it is ensured that the quality of zinc for hot galvanizing of cold rolling plate surface.
Solving the technical scheme of above-mentioned technical problem is：
A kind of system of on-line checking cold-reduced sheet skin-friction coefficient, including 2 hydraulic cylinders, skin-friction coefficient detection dresses
Put and Process Control System；Oil inlet pipe and flowline are connected with the hydraulic cylinder, solenoid valve is installed on oil inlet pipe, gone out
Electromagnetic switch valve is installed on oil pipe；Hydraulic cylinder is also equipped with pressure sensor and displacement transducer；The skin-friction coefficient inspection
Surveying device includes working roll, backing roll, bearing block, dc generator and ammeter；Working roll and backing roll are relatively arranged on cold
The upper and lower surface of plate is rolled, the working roll two ends shaft shoulder is installed in 2 bearing blocks, bearing block connects with 2 piston rods of hydraulic cylinder respectively
Connect, moving up and down for working roll is driven by the motion of piston；One end of working roll is connected with dc generator, and ammeter is installed
On dc generator；The Process Control System includes that computer and computer connect and is connected to control hydraulic cylinder piston to move
The solenoid valve PLC and electromagnetic switch valve PLC of work, pressure information in feedback hydraulic cylinder, piston position are connected to computer
The feedback of the information PLC of shifting information and ammeter current information.
A kind of system of above-mentioned on-line checking cold-reduced sheet skin-friction coefficient, 2 hydraulic cylinders are individually fixed in liquid
On cylinder pressure support, hydraulic cylinder is divided into epicoele and cavity of resorption by the piston of each hydraulic cylinder, and epicoele connection epicoele oil inlet pipe and epicoele go out
Oil pipe, installs epicoele solenoid valve on epicoele oil inlet pipe, epicoele electromagnetic switch valve is installed on epicoele flowline；Under cavity of resorption connection
Chamber oil inlet pipe and cavity of resorption flowline, install cavity of resorption solenoid valve on cavity of resorption oil inlet pipe, cavity of resorption electromagnetism is installed on cavity of resorption flowline
Switch valve；Upper cavity pressure sensor, cavity of resorption pressure sensor are separately installed with epicoele and cavity of resorption；Displacement is installed in hydraulic cylinder to pass
Sensor；Epicoele flowline and cavity of resorption flowline are connected away from the one end being connected with hydraulic cylinder with hydraulic oil container；
The skin-friction coefficient detection means also includes shaft coupling, driven shaft and DC generation machine support；Working roll leads to
Cross shaft coupling to be connected with one end of driven shaft, the other end of driven shaft is connected with dc generator, ammeter is sent out installed in direct current
On motor, DC generation machine support is fixedly connected the synchronizing moving realized with piston with the piston rod of hydraulic cylinder；
The Process Control System is connected including computer, respectively with computer carries out the hydraulic cylinder epicoele electricity of data communication
Magnetically condition valve PLC, hydraulic cylinder cavity of resorption solenoid valve PLC, hydraulic cylinder epicoele electromagnetic switch valve PLC, hydraulic cylinder cavity of resorption electromagnetism are opened
Close valve PLC and feedback of the information PLC；The upper and lower chamber solenoid valve PLC of hydraulic cylinder is adjusted with the upper and lower chamber electromagnetism of hydraulic cylinder respectively
Valve is connected；The upper and lower chamber electromagnetic switch valve PLC of hydraulic cylinder is connected with upper and lower chamber electromagnetic switch valve respectively；Feedback of the information PLC
It is connected with upper cavity pressure sensor, cavity of resorption pressure sensor, displacement transducer and ammeter respectively, and relevant information is real-time
Feed back to computer.
A kind of system of above-mentioned on-line checking cold-reduced sheet skin-friction coefficient, the epicoele and cavity of resorption of the hydraulic cylinder are also pacified
Equipped with epicoele Hydraulic Relief Valve and cavity of resorption Hydraulic Relief Valve.
A kind of application method of the system of on-line checking cold-reduced sheet skin-friction coefficient, comprises the steps of：
Step 1：Moved up by piston in computer controls hydraulic cylinder, drive and moved on working roll, make working roll with branch
Thickness of the roll gap more than cold-reduced sheet between runner；
Step 2：Moved down by piston in computer controls hydraulic cylinder, drive working roll to move down, when the electricity of ammeter
When flow valuve is more than zero, show that working roll is contacted with cold rolling plate surface, continuation keeps working roll to move down is applied to working roll
The pressure of cold-reduced sheet gradually increases, and computer utilizes its built-in calculation of pressure model, obtains current time working roll and is applied to
Pressure size on cold-reduced sheet, i.e.,：
In formula：The pressure of F cold rolling plate surfaces for working roll is applied to, unit：N；
PτThe hydraulic fluid pressure in hydraulic cylinder epicoele gone out for upper cavity pressure sensor feedback, unit：Pa；
D is piston axis of great circle, unit：m；
D is piston rod diameter, unit：m；
G is working roll weight, unit：N；
Step 3：When current value no longer increases, curent change point of inflexion on a curve value I under computer recording0And it is corresponding
Working roll be applied to pressure value F on cold-reduced sheet0, according to Ampere's law, obtain being applied to the Ampere force on dc generator,
I.e.：
FA=BI0·L
In formula：FATo be applied to the Ampere force on dc generator, unit：N；
B is the magnetic induction intensity of dc generator upper magnet, unit：T；
I0The curent change point of inflexion on a curve value of computer, unit are fed back to for ammeter：A；
L is the conductor length on dc generator machine coil, unit：m；
According to Newton mechanics law, it is F to obtain the frictional force between working roll and cold rolling plate surfaceA；
Step 4：Computer draws the friction system of the cold rolling plate surface under corresponding process conditions according to above-mentioned testing result
Number, i.e.,：
In formula：μ is the coefficient of friction of cold rolling plate surface.
A kind of application method of the system of above-mentioned on-line checking cold-reduced sheet skin-friction coefficient, specifically the step of
For：
Step 1：Close epicoele solenoid valve, cavity of resorption solenoid valve, epicoele electromagnetic switch valve and cavity of resorption electromagnetic switch
Valve；
Step 2：Computer opens cavity of resorption electromagnetism by controlling cavity of resorption solenoid valve PLC and epicoele electromagnetic switch valve PLC
Regulating valve and epicoele electromagnetic switch valve, piston are moved up under the pressure of hydraulic oil, drive working roll to move up；Work as displacement
After the highest dot position information of piston is fed back to computer by sensor, control computer is electric by cavity of resorption solenoid valve and epicoele
Magnetic switch valve is closed, now, thickness of the roll gap more than cold-reduced sheet between working roll and backing roll；
Step 3：Computer opens epicoele electromagnetism by controlling epicoele solenoid valve PLC and cavity of resorption electromagnetic switch valve PLC
Regulating valve and cavity of resorption electromagnetic switch valve, it is ensured that epicoele solenoid valve aperture is constant, piston driving working roll is moved down；Work as electricity
When flow table is more than zero by the current value that feedback of the information PLC feeds back to computer, computer gradually increases epicoele solenoid valve
Aperture, the oil pressure in hydraulic cylinder epicoele will gradually increase, and current value gradually increases, and working roll is applied to the pressure of cold-reduced sheet
To gradually increase；Computer utilizes its built-in calculation of pressure model, obtains current time working roll and is applied on cold-reduced sheet
Pressure size, i.e.,：
In formula：The pressure of F cold rolling plate surfaces for working roll is applied to, unit：N；
PτThe hydraulic fluid pressure in hydraulic cylinder epicoele gone out for upper cavity pressure sensor feedback, unit：Pa；
D is piston axis of great circle, unit：m；
D is piston rod diameter, unit：m；
G is working roll weight, unit：N；
Step 4：When current value no longer increases, curent change point of inflexion on a curve value I under computer recording0And it is corresponding
Working roll be applied to pressure value F on cold-reduced sheet0, then according to Ampere's law, obtain being applied to the peace on dc generator
Training power, i.e.,：
FA=BI0·L
In formula：FATo be applied to the Ampere force on dc generator, unit：N；
B is the magnetic induction intensity of dc generator upper magnet, unit：T；
I0The curent change point of inflexion on a curve value of computer, unit are fed back to for ammeter：A；
L is the conductor length on dc generator machine coil, unit：m；
According to Newton mechanics law, it is F to obtain the frictional force between working roll and cold rolling plate surface；
Step 5：Computer draws the friction of the cold rolling plate surface under corresponding process conditions according to the testing result of step 4
Coefficient, i.e.,：
In formula：μ is the coefficient of friction of cold rolling plate surface.
The operation principle of the system of on-line checking cold-reduced sheet skin-friction coefficient provided by the present invention is：When working roll with
When cold rolling plate surface is contacted, the frictional force between cold-reduced sheet and working roll can turn into the driving force of working roll rotating speed, so as to promote
Working roll is rotated, and working roll will also be rotated by shaft coupling and driven shaft band dynamotor；When working roll and cold-reduced sheet
Between pressure it is bigger, i.e.,：Working roll contacts tightr with cold-reduced sheet, then the frictional force between working roll and cold-reduced sheet is bigger,
The driving force for promoting working roll to rotate is also bigger, and the rotating speed of working roll is bigger, accordingly, the electric current produced by dc generator
Bigger, the Ampere force inside dc generator is bigger；According to Newton mechanics law, the friction between working roll and cold-reduced sheet
Power is equal to the Ampere force inside dc generator；When the pressure between working roll and cold-reduced sheet reaches certain value, therebetween
Frictional force will no longer increase, thus, the electric current produced by dc generator also will no longer change；Therefore, turned by analyzing this
The relation of pressure between Ampere force and working roll and cold-reduced sheet produced by point moment electric current, it is possible to accordingly obtain the cold-reduced sheet
The coefficient of friction on surface.
The beneficial effects of the invention are as follows：
The present invention is realized online by hydraulic cylinder, cold-reduced sheet skin-friction coefficient detection means and Process Control System
Detection fast and accurately to cold-reduced sheet skin-friction coefficient, so as to meet galvanizing air knife parameter on-line tuning for cold
The requirement of plate surface coefficient of friction is rolled, is quickly to adjust hot dip galvanizing production process, it is ensured that the galvanizing quality of cold rolling plate surface is laid
Solid foundation, in industry there is a great popularizing value.
Brief description of the drawings
Fig. 1 is hydraulic cylinder structure figure；
Fig. 2 is cold-reduced sheet skin-friction coefficient structure of the detecting device figure；
Fig. 3 is Process Control System schematic diagram；
Fig. 4 is that the working roll in detection process is applied to the current value that the pressure of cold rolling plate surface and ammeter are detected
Graph of relation；
Marked in figure：Hydraulic cylinder leg 1, piston 2, piston rod 3, epicoele oil inlet pipe 4, epicoele flowline 5, epicoele electromagnetism
Regulating valve 6, epicoele electromagnetic switch valve 7, cavity of resorption oil inlet pipe 8, cavity of resorption flowline 9, cavity of resorption solenoid valve 10, cavity of resorption electromagnetic switch
Valve 11, upper cavity pressure sensor 12, cavity of resorption pressure sensor 13, displacement transducer 14, hydraulic oil container 15, working roll 16, supporting
Roller 17, bearing block 18, dc generator 19, ammeter 20, cold-reduced sheet 21, shaft coupling 22, driven shaft 23, DC generation machine support
24th, computer 25, hydraulic cylinder epicoele solenoid valve PLC26, hydraulic cylinder cavity of resorption solenoid valve PLC27, hydraulic cylinder epicoele electricity
Magnetic switch valve PLC28, hydraulic cylinder cavity of resorption electromagnetic switch valve PLC29, feedback of the information PLC30, epicoele Hydraulic Relief Valve 31, cavity of resorption liquid
Pressurized overflow valve 32.
Specific embodiment
A kind of system of on-line checking cold-reduced sheet skin-friction coefficient of the present invention, including 2 hydraulic cylinders, skin-friction coefficients
Detection means and Process Control System；
Fig. 1 shows that 2 hydraulic cylinders are individually fixed on hydraulic cylinder leg 1, and the piston 2 of each hydraulic cylinder divides hydraulic cylinder
It is epicoele and cavity of resorption, epicoele connects epicoele oil inlet pipe 4 and epicoele flowline 5, and epicoele solenoid valve is installed on epicoele oil inlet pipe 4
6, epicoele electromagnetic switch valve 7 is installed on epicoele flowline 5；Cavity of resorption connection cavity of resorption oil inlet pipe 8 and cavity of resorption flowline 9, cavity of resorption oil-feed
Cavity of resorption solenoid valve 10 is installed on pipe 8, cavity of resorption electromagnetic switch valve 11 is installed on cavity of resorption flowline 9；On epicoele and cavity of resorption respectively
Upper cavity pressure sensor 12, cavity of resorption pressure sensor 13 are installed；To ensure hydraulic cylinder safe handling, the epicoele of hydraulic cylinder is with
Epicoele Hydraulic Relief Valve 31 and cavity of resorption Hydraulic Relief Valve 32 are also separately installed with chamber；；Displacement transducer 14 is installed in hydraulic cylinder；
Epicoele flowline 5 and cavity of resorption flowline 9 are connected away from the one end being connected with hydraulic cylinder with hydraulic oil container 15；
Fig. 2 shows that skin-friction coefficient detection means includes working roll 16,17,2 bearing blocks 18, shaft coupling of backing roll
22nd, driven shaft 23, dc generator 19, ammeter 20 and DC generation machine support 24；Working roll 16 and backing roll 17 set relatively
The upper and lower surface of cold-reduced sheet 21 is placed in, the shaft shoulder at the two ends of working roll 16 is installed in 2 bearing blocks 18, and 2 bearing blocks 18 are distinguished
It is connected with 2 piston rods of hydraulic cylinder 3, moving up and down for working roll 16 is driven by the motion of piston 2；Working roll 16 is by connection
Axle device 22 is connected with one end of driven shaft 23, and the other end of driven shaft 23 is connected with dc generator 19, and dc generator 19 exists
Electric current, ammeter 20 is produced to be arranged on dc generator 19 for showing that dc generator 19 is produced under the driving of driven shaft 23
Current value；DC generation machine support 24 is fixedly connected the synchronizing moving realized with piston 2 with the piston rod 3 of hydraulic cylinder；
Fig. 3 shows that Process Control System is connected the hydraulic pressure for carrying out data communication including computer 25, respectively with computer 25
Cylinder epicoele solenoid valve PLC26, hydraulic cylinder cavity of resorption solenoid valve PLC27, hydraulic cylinder epicoele electromagnetic switch valve PLC28, liquid
Cylinder pressure cavity of resorption electromagnetic switch valve PLC29 and feedback of the information PLC30；On the epicoele solenoid valve PLC26 and hydraulic cylinder of hydraulic cylinder
Chamber solenoid valve 6 is connected, and hydraulic cylinder cavity of resorption solenoid valve PLC27 is connected with hydraulic cylinder cavity of resorption solenoid valve 10；
Hydraulic cylinder epicoele electromagnetic switch valve PLC28 is connected with epicoele electromagnetic switch valve 7, and cavity of resorption electromagnetic switch valve PLC29 is electric with cavity of resorption
Magnetic switch valve 11 is connected；Feedback of the information PLC30 is passed with upper cavity pressure sensor 12, cavity of resorption pressure sensor 13, displacement respectively
Sensor 14 is connected with ammeter 20, and by relevant information Real-time Feedback to computer 25.
A kind of application method of the system of on-line checking cold-reduced sheet skin-friction coefficient of the present invention, comprises the following steps：
Step 1：Manual-lock epicoele solenoid valve 6, cavity of resorption solenoid valve 10, epicoele electromagnetic switch valve 7 and cavity of resorption
Electromagnetic switch valve 11；
Step 2：The mode of operation of computer 25 is adjusted to " before detection " pattern, then, computer 25 is grasped according to scene
The instruction of work person, is adjusted to hydraulic cylinder respectively, and concrete operations are：Computer 25 is to hydraulic cylinder cavity of resorption solenoid valve
PLC27 sends instruction, opens cavity of resorption solenoid valve 10, and now hydraulic oil enters the cavity of resorption of hydraulic cylinder；Meanwhile, on hydraulic cylinder
Chamber electromagnetic switch valve PLC 28 sends instruction, opens epicoele electromagnetic switch valve 7, and piston 2 is moved up under the pressure of hydraulic oil,
Working roll 16 is driven to move up；After the highest dot position information of piston 2 is fed back to computer 25 by displacement transducer 14, meter
Calculation machine 25 closes cavity of resorption solenoid valve 10 and epicoele electromagnetic switch valve 7, realizes that working roll 16 rises to highest order with piston 2
It is motionless after standing；Now, the roll gap between working roll 16 and backing roll 17 is more than the thickness of cold-reduced sheet 21, i.e.,：The energy of cold-reduced sheet 21
It is enough to be passed through between working roll 16 and backing roll 17 completely；
Step 3：According to produce reality situation, the mode of operation of computer 25 is adjusted to " detection " pattern；Control is calculated
Machine 25 sends instruction to hydraulic cylinder epicoele solenoid valve PLC 26, opens epicoele solenoid valve 6, and now hydraulic oil enters liquid
The epicoele of cylinder pressure；Meanwhile, instruction is sent to hydraulic cylinder cavity of resorption electromagnetic switch valve PLC 29, cavity of resorption electromagnetic switch valve 11 is opened, so
Afterwards, it is ensured that the aperture of epicoele solenoid valve 6 is constant, now piston 2 will drive working roll 16 to move down；When ammeter 20 is logical
Cross feedback of the information PLC 30 and feed back to the current value of computer 25 when being zero, show working roll 16 not yet with the surface of cold-reduced sheet 21
Contact, now, computer 25 will not change the aperture of epicoele solenoid valve 6, and upper cavity pressure sensor 12 feeds back the oil for obtaining
Pressure value keeps constant；When ammeter 20 is more than zero by the current value that feedback of the information PLC 30 feeds back to computer 25, show
Surface of the working roll 16 with cold-reduced sheet 21 contacts；Now, computer 25 will be by hydraulic cylinder epicoele magnetic valve regulating valve PLC
26 apertures for constantly increasing epicoele solenoid valve 6, the oil pressure in hydraulic cylinder epicoele also will gradually increase, corresponding, working roll
16 pressure for being applied to cold-reduced sheet 21 also will gradually increase, and working roll 16 also gradually increases with the frictional force on the surface of cold-reduced sheet 21,
The velocity of rotation of working roll 16 is increasing, and the indicating value of ammeter 20 also constantly increases；Computer 25 utilizes its built-in pressure gauge
Model is calculated, the pressure size that current time working roll 16 is applied on cold-reduced sheet 21 is obtained, i.e.,：
In formula：The pressure of F cold rolling plate surfaces for working roll is applied to, unit：N；
PτThe hydraulic fluid pressure in hydraulic cylinder epicoele gone out for upper cavity pressure sensor feedback, unit：Pa；
D is piston axis of great circle, unit：m；
D is diameter of piston rod, unit：m；
G is working roll weight, unit：N；
Step 4：When current value no longer increases, computer 25 records curent change point of inflexion on a curve value I0And institute is right
The working roll 16 answered is applied to the pressure value F on cold-reduced sheet 210, then according to Ampere's law, obtain being applied to dc generator
Ampere force on 19, i.e.,：
FA=BI0·L
In formula：FATo be applied to the Ampere force on dc generator, unit：N；
B is the magnetic induction intensity of dc generator upper magnet, unit：T；
I0The curent change point of inflexion on a curve value of computer is fed back to for ammeter, as shown in figure 4, unit：A；
L is the conductor length on dc generator coil, unit：m；
According to Newton mechanics law, it is F to obtain the frictional force between working roll 16 and the surface of cold-reduced sheet 21A；
Step 5：Computer 25 draws the surface of cold-reduced sheet 21 under corresponding process conditions according to the testing result of step 4
Coefficient of friction, i.e.,：
In formula：μ is the coefficient of friction on the surface of cold-reduced sheet 24.
After computer 25 draws the coefficient of friction on the surface of cold-reduced sheet table 21, operated according to step 2 again, and according to
Produce reality demand, carries out the operation of step 3~step 5.
Claims (5)
1. a kind of system of on-line checking cold-reduced sheet skin-friction coefficient, it is characterised in that：It rubs including 2 hydraulic cylinders, surfaces
Wipe coefficient detection means and Process Control System；Oil inlet pipe and flowline are connected with the hydraulic cylinder, are provided with oil inlet pipe
Solenoid valve, installs electromagnetic switch valve on flowline；Hydraulic cylinder is also equipped with pressure sensor and displacement transducer (14)；Institute
Stating skin-friction coefficient detection means includes working roll (16), backing roll (17), bearing block (18), dc generator (19) and electricity
Flow table (20)；Working roll (16) and backing roll (17) are relatively arranged on the upper and lower surface of cold-reduced sheet (21), working roll (16) two ends
The shaft shoulder be installed in 2 bearing blocks (18), bearing block (18) is connected with 2 piston rods of hydraulic cylinder (3) respectively, by piston
(2) motion drives moving up and down for working roll (16)；One end of working roll (16) is connected with dc generator (19), ammeter
(20) on dc generator (19)；The Process Control System includes that computer (25) and computer (25) connect in succession
For the solenoid valve PLC and electromagnetic switch valve PLC that control hydraulic cylinder piston (2) to act, it is connected to computer (25)
The feedback of the information PLC (30) of the current information of pressure information, piston displacement information and ammeter (20) in feedback hydraulic cylinder.
2. a kind of system of on-line checking cold-reduced sheet skin-friction coefficient as claimed in claim 1, it is characterised in that：Described 2
Individual hydraulic cylinder is individually fixed on hydraulic cylinder leg (1), and hydraulic cylinder is divided into epicoele and cavity of resorption by the piston (2) of each hydraulic cylinder,
Epicoele connects epicoele oil inlet pipe (4) and epicoele flowline (5), and epicoele solenoid valve (6) is installed on epicoele oil inlet pipe (4), on
Epicoele electromagnetic switch valve (7) is installed on chamber flowline (5)；Cavity of resorption connects cavity of resorption oil inlet pipe (8) and cavity of resorption flowline (9), cavity of resorption
Cavity of resorption solenoid valve (10) is installed on oil inlet pipe (8), cavity of resorption electromagnetic switch valve (11) is installed on cavity of resorption flowline (9)；Epicoele
With upper cavity pressure sensor (12), cavity of resorption pressure sensor (13) are separately installed with cavity of resorption；Displacement sensing is installed in hydraulic cylinder
Device (14)；Epicoele flowline (5) and cavity of resorption flowline (9) are connected away from the one end being connected with hydraulic cylinder with hydraulic oil container (15)；
The skin-friction coefficient detection means also includes shaft coupling (22), driven shaft (23) and DC generation machine support (24)；
Working roll (16) is connected by shaft coupling (22) with one end of driven shaft (23), the other end and dc generator of driven shaft (23)
(19) connect, ammeter (20) on dc generator (19), the piston rod of DC generation machine support (24) and hydraulic cylinder
(3) it is fixedly connected the synchronizing moving realized with piston (2)；
The Process Control System is connected on the hydraulic cylinder for carrying out data communication including computer (25), respectively with computer (25)
Chamber solenoid valve PLC (26), hydraulic cylinder cavity of resorption solenoid valve PLC (27), hydraulic cylinder epicoele electromagnetic switch valve PLC (28),
Hydraulic cylinder cavity of resorption electromagnetic switch valve PLC (29) and feedback of the information PLC (30)；The upper and lower chamber solenoid valve PLC difference of hydraulic cylinder
It is connected with the upper and lower chamber solenoid valve of hydraulic cylinder；The upper and lower chamber electromagnetic switch valve PLC of hydraulic cylinder is opened with upper and lower chamber electromagnetism respectively
Valve is closed to be connected；Feedback of the information PLC (30) is passed with upper cavity pressure sensor (12), cavity of resorption pressure sensor (13), displacement respectively
Sensor (14) is connected with ammeter (20), and gives computer (25) by relevant information Real-time Feedback.
3. a kind of system of on-line checking cold-reduced sheet skin-friction coefficient as claimed in claim 1 or 2, it is characterised in that：Institute
The epicoele and cavity of resorption for stating hydraulic cylinder are also equipped with epicoele Hydraulic Relief Valve (31) and cavity of resorption Hydraulic Relief Valve (32).
4. a kind of application method of the system of on-line checking cold-reduced sheet skin-friction coefficient, it is characterised in that：Comprise the steps of：
Step 1：Piston (2) is moved up in controlling hydraulic cylinder by computer (25), is driven and moved on working roll (16), makes work
Thickness of the roll gap more than cold-reduced sheet (21) between roller (16) and backing roll (17)；
Step 2：Piston (2) is moved down in controlling hydraulic cylinder by computer (25), drives working roll (16) to move down, and works as electric current
When the current value of table (20) is more than zero, show that working roll (16) is contacted with cold-reduced sheet (21) surface, continue to keep working roll
(16) pressure that moving down makes working roll (16) be applied to cold-reduced sheet (21) gradually increases, and computer (25) utilizes its built-in pressure
Computation model, obtains the pressure size that current time working roll is applied on cold-reduced sheet (21), i.e.,：
In formula：The pressure of F cold rolling plate surfaces for working roll is applied to, unit：N；
PτThe hydraulic fluid pressure in hydraulic cylinder epicoele gone out for upper cavity pressure sensor feedback, unit：Pa；
D is piston axis of great circle, unit：m；
D is piston rod diameter, unit：m；
G is working roll weight, unit：N；
Step 3：When current value no longer increases, computer (25) records curent change point of inflexion on a curve value I0And it is corresponding
Working roll (16) be applied to pressure value F on cold-reduced sheet (21)0, according to Ampere's law, obtain being applied to dc generator
(19) Ampere force on, i.e.,：
FA=BI0·L
In formula：FATo be applied to the Ampere force on dc generator, unit：N；
B is the magnetic induction intensity of dc generator upper magnet, unit：T；
I0The curent change point of inflexion on a curve value of computer, unit are fed back to for ammeter：A；
L is the conductor length on dc generator machine coil, unit：m；
According to Newton mechanics law, it is F to obtain the frictional force between work (16) roller and cold-reduced sheet (21) surfaceA；
Step 4：Computer (25) draws the friction system of the cold rolling plate surface under corresponding process conditions according to above-mentioned testing result
Number, i.e.,：
In formula：μ is the coefficient of friction of cold rolling plate surface.
5. a kind of application method of the system of on-line checking cold-reduced sheet skin-friction coefficient as claimed in claim 4, its feature
It is：Specific step includes：
Step 1：Close epicoele solenoid valve (6), cavity of resorption solenoid valve (10), epicoele electromagnetic switch valve (7) and cavity of resorption electricity
Magnetic switch valve (11)；
Step 2：Computer (25) is by controlling hydraulic cylinder cavity of resorption solenoid valve PLC (27) and hydraulic cylinder epicoele electromagnetic switch valve
PLC (28), opens cavity of resorption solenoid valve (10) and epicoele electromagnetic switch valve (7), and piston (2) is upward under the pressure of hydraulic oil
It is mobile, drive working roll (16) to move up；When the highest dot position information of piston (2) is fed back to meter by displacement transducer (14)
After calculation machine (25), control computer (25) closes cavity of resorption solenoid valve (10) and epicoele electromagnetic switch valve (7), now, work
Make thickness of the roll gap between roller (16) and backing roll (17) more than cold-reduced sheet (21)；
Step 3：Computer (25) is by controlling hydraulic cylinder epicoele solenoid valve PLC (26) and hydraulic cylinder cavity of resorption electromagnetic switch valve
PLC (29), opens epicoele solenoid valve (6) and cavity of resorption electromagnetic switch valve (11), it is ensured that the aperture of epicoele solenoid valve (6)
Constant, piston (2) drives working roll (16) to move down；When ammeter (20) feeds back to calculating by feedback of the information PLC (30)
When the current value of machine (25) is more than zero, computer (25) gradually increases the aperture of epicoele solenoid valve (6), in hydraulic cylinder epicoele
Oil pressure will gradually increase, current value gradually increases, and the pressure that working roll (16) is applied to cold-reduced sheet (21) also will gradually increase；
Computer (25) utilizes its built-in calculation of pressure model, obtains current time working roll (16) and is applied on cold-reduced sheet (21)
Pressure size, i.e.,：
In formula：The pressure of F cold rolling plate surfaces for working roll is applied to, unit：N；
PτThe hydraulic fluid pressure in hydraulic cylinder epicoele gone out for upper cavity pressure sensor feedback, unit：Pa；
D is piston axis of great circle, unit：m；
D is piston rod diameter, unit：m；
G is working roll weight, unit：N；
Step 4：When current value no longer increases, computer (25) records curent change point of inflexion on a curve value I0And it is corresponding
Working roll (16) be applied to pressure value F on cold-reduced sheet (21)0, then according to Ampere's law, obtain being applied to DC generation
Ampere force on machine (19), i.e.,：
FA=BI0·L
In formula：FATo be applied to the Ampere force on dc generator, unit：N；
B is the magnetic induction intensity of dc generator upper magnet, unit：T；
I0The curent change point of inflexion on a curve value of computer, unit are fed back to for ammeter：A；
L is the conductor length on dc generator machine coil, unit：m；
According to Newton mechanics law, it is F to obtain the frictional force between working roll (16) and cold-reduced sheet (21) surfaceA；
Step 5：Computer (25) draws cold-reduced sheet (21) surface under corresponding process conditions according to the testing result of step 4
Coefficient of friction, i.e.,：
In formula：μ is the coefficient of friction of cold rolling plate surface.
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| CN107795531A (en) * | 2017-11-13 | 2018-03-13 | 邯郸钢铁集团有限责任公司 | A kind of system and its application method for keeping the secondary pressure angle stability hydraulic of chamfering slab |
| CN107900113A (en) * | 2017-11-17 | 2018-04-13 | 中铝瑞闽股份有限公司 | A kind of method for evaluating Aluminum Strip Rolling oil technological lubrication performance |
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| KR101316646B1 (en) * | 2011-09-09 | 2013-10-10 | 주식회사 포스코 | Portable apparatus for measuring surface of roll fortransferring cold rolled steel sheet |
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| CN206716735U (en) * | 2017-01-04 | 2017-12-08 | 邯郸钢铁集团有限责任公司 | A kind of system of on-line checking cold-reduced sheet skin-friction coefficient |
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| CN101537431A (en) * | 2008-03-21 | 2009-09-23 | 宝山钢铁股份有限公司 | Method for online predicting and controlling of roughness of surface of cold-rolled thin steel strip |
| KR101316646B1 (en) * | 2011-09-09 | 2013-10-10 | 주식회사 포스코 | Portable apparatus for measuring surface of roll fortransferring cold rolled steel sheet |
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