CN111922092B - Control method of ironing roller device - Google Patents
Control method of ironing roller device Download PDFInfo
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- CN111922092B CN111922092B CN202010803619.1A CN202010803619A CN111922092B CN 111922092 B CN111922092 B CN 111922092B CN 202010803619 A CN202010803619 A CN 202010803619A CN 111922092 B CN111922092 B CN 111922092B
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- 238000010409 ironing Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000005484 gravity Effects 0.000 claims abstract description 28
- 238000005096 rolling process Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims description 38
- 239000004033 plastic Substances 0.000 claims description 36
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000007774 longterm Effects 0.000 abstract description 5
- 238000011161 development Methods 0.000 abstract description 4
- 230000004069 differentiation Effects 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/32—Tongs or gripping means specially adapted for reeling operations
- B21C47/323—Slits or pinces on the cylindrical wall of a reel or bobbin, adapted to grip the end of the material being wound
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
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Abstract
A control method of an ironing roller device comprises the steps of firstly determining a parameter table corresponding to the coil diameter and the angle of a rotating arm and a parameter table corresponding to the gravity of the rotating arm through a back-pushing method, then inputting the parameter tables into a PLC, and carrying out closed-loop control on a set target value through PID (proportion integration differentiation) so that a set pressure is applied to a coil by an ironing roller, so that the coil is firmly coiled, the end faces of the coil are flush, and the aim of high-speed and high-efficiency production of a rolling mill is fulfilled. The invention can conveniently obtain the parameter table of the rotating arm angle corresponding to the rotating arm gravity and the parameter table of the rotating arm angle corresponding to the rotating arm gravity, can finish revising the parameter table without precisely measuring the data of each machine component of the ironing roller device and carrying out mathematical modeling, solves the maintenance problem of the imported ironing roller device, and ensures that the ironing roller device can reliably operate for a long time. The control method has the advantages of high timeliness, easiness in implementation and low cost, and is beneficial to long-term development of enterprises.
Description
Technical Field
The invention relates to the technical field of rolling mill equipment, in particular to a control method of an ironing roller device.
Background
The rolling speed of the modern rolling mill is very high, and when a strip (particularly a thin strip) is coiled, air is easily brought between strip layers to form an air wedge, so that the problem of strip layer fleeing is caused, the coiling quality of a coiled material is influenced, and the production speed of the rolling mill is reduced. For example, the aluminum cold rolling mill produces 0.1-0.2mm strip, and if the ironing roll is not used for auxiliary production, the speed is reduced from 1400m/min to about 700m/min, and the efficiency is reduced by 50%. Therefore, existing rolling mills are equipped with ironing rolls. The ironing roller has the functions of applying relatively constant pressure to the surface of the coiled material; secondly, along with the increase of the coil diameter of the coil, the contact point of the ironing roller and the coil is ensured to be always near the tangent point. The air that just so can bring in the coiled material rolling in-process is discharged, reaches that the coiled material batches firmly, the terminal surface is parallel and level, and then reaches the purpose of high-speed, the high efficiency production of rolling mill.
As shown in fig. 1, the conventional ironing roll apparatus includes a rotating arm whose rotation angle is controlled by a hydraulic cylinder, and an ironing roll, which is pressed on a web, is connected to a free end of the rotating arm. The existing ironing roller device is generally provided with an ironing roller made of a plastic roller and a steel roller, and the ironing roller is switched by a group of switching hydraulic cylinders according to the process requirements and the thickness of a strip. Generally, plastic rollers are used for thin strips, and steel rollers are used for thick strips. Since the dimensions of the phase-change machine components are fixed during manufacture, the angle at which the swivel arm is swung, and the distance of the ironing roll from the surface of the reel, can be calculated by mathematical modeling.
When a plastic roller is selected, the existing ironing roller device adopts a position closed-loop control mode. Specifically, a set of parameter table of the roll diameter values corresponding to different angles is designed, and the rotating angle of the rotating arm is controlled through PID, so that the aims of increasing the roll diameter and lifting the ironing roller are fulfilled. The parameter table is composed of multi-point data and is a linear control value, and the more sections are, the more accurate the rotating angle of the rotating arm is. The plastic roller is connected with a telescopic cylinder (equivalent to a spring), and the plastic roller presses on the coiled material under the action of the pressure of the cylinder, so that the control effect of relative constant pressure is achieved on the coiled material.
When a steel roller is selected, the existing ironing roller device adopts a pressure closed-loop control mode. Specifically, the push-pull force of the lifting hydraulic cylinder subtracts the self-gravity of the lower rotating arm at a real-time angle, simultaneously considers the factors of the installation position, the acting force arm and the like of the hydraulic cylinder, and then multiplies the factors by a certain transfer coefficient to act on the surface of the coiled material. In the pressure mode, the pressure of the steel roller on the coiled material is set to be a fixed value, the dead weight of the rotating arm is used as a variable, the PID adjustment is carried out on the lifting hydraulic cylinder, the output of the pushing force at different angles is controlled, and therefore the effect of controlling the coiled material to have a relatively constant pressure is achieved. The pressure control core lies in that a set of gravity parameter tables corresponding to different angles are relied on, and the parameter tables are obtained through mathematical modeling calculation according to mechanism design drawings and installation position requirements during design.
No matter the plastic roller or the steel roller is selected, the existing ironing roller device has the problem that the ironing roller runs reliably and stably in the initial stage of equipment installation. As the equipment is worn and aged, the ironing roller which runs according to the parameter table has larger deviation from the actual requirement under the influence of factors such as the change of the size of a component, the drift of the position, the replacement of a roller system mechanism and the like. The deviation is not beneficial to achieving the requirements of firm coiling and level end surface of the coiled material, and is also not beneficial to achieving the purpose of high-speed and high-efficiency production of the rolling mill. The parameter table is required to be revised periodically in production, and the revised parameter table has strong speciality and requires strong mathematical modeling capability. As enterprises and equipment users, the data of each machine component of the ironing roller device are measured, and the problems that a measuring instrument is not complete, the measuring precision cannot be guaranteed, partial internal structure and installation errors cannot be measured exist. In addition, the technical threshold is high, the equipment operator usually does not have professional mathematical modeling and calculating capability, if professional personnel are required to measure, model, calculate and revise the parameter table, the problems of low timeliness, high cost and the like exist, and the problems are not beneficial to the long-term development of enterprises, so that the control method of the existing ironing roller device needs to be improved to meet the requirements of the enterprises.
Disclosure of Invention
In order to overcome the defects in the background art, the invention discloses a control method of an ironing roller device, which aims to: the maintenance difficulty of the ironing roller device is reduced, and the method is suitable for the long-term use requirement of enterprises.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method of an ironing roll device belongs to the composition part of rolling mill equipment and comprises a rotating arm of which the rotating angle is controlled by a lifting hydraulic cylinder, wherein the free end of the rotating arm is connected with an ironing roll switching mechanism; the ironing roller switching mechanism comprises a swing arm hinged with the rotating arm, the free end of the swing arm is connected with a plastic roller and a steel roller, and the swing arm is driven by a switching hydraulic cylinder to realize the switching of the plastic roller and the steel roller; wherein, the pressure of the plastic roller to the coiled material is provided by the cylinder, and the method comprises the following steps:
the method comprises the following steps: determining a parameter table, the parameter table being determined by the steps of:
s1: measuring the diameter of the reel in the empty reel state, and recording the diameter as D0; switching the plastic roller to a working position, controlling a lifting hydraulic cylinder to press the plastic roller on the empty reel, recording the angle A0 of the rotating arm at the moment through an angle encoder of the ironing roller device, and then lifting the plastic roller;
s2: starting a coiling machine, stopping the machine after coiling a coiled material with a certain coiling diameter on a reel on the premise of not losing tension, and measuring and recording the coiling diameter D1 of the coiled material; controlling a lifting hydraulic cylinder to press the plastic roller on the coiled material, recording the angle A1 of the rotating arm at the moment through an angle encoder, and then lifting the plastic roller;
s3: repeating S2, and respectively recording D2, D3, … Dn, A1, A2 and A3 … An to obtain a group of parameter tables corresponding to the roll diameter of the coiled material and the angle of the rotating arm;
s4: switching the steel roller to a working position, controlling a lifting hydraulic cylinder to stabilize the angle of a rotating arm at an A0 position, recording oil pressures P0 and P0 ' at two ends of a piston of the lifting hydraulic cylinder, and calculating G according to a formula G = (P0 × S-P0 ' × S ')/K;
in the formula, G is the gravity of the rotating arm end, P0 is the pressure of the oil cavity end of the lifting hydraulic cylinder, P0 'is the pressure of the piston rod end of the lifting hydraulic cylinder, S is the section area of the oil cavity end of the lifting hydraulic cylinder, S' is the section area of the piston rod end of the lifting hydraulic cylinder, and K is the conversion coefficient of force;
s5: repeating S4 to obtain gravity G1, G2 and G3 … Gn at the end of the rotating arm when the angle of the rotating arm is respectively stabilized at the positions A1, A2 and A3 … An, and obtaining a group of parameter tables corresponding to the angle of the rotating arm and the gravity of the rotating arm;
step two: inputting a parameter table of the coil diameter of the coiled material corresponding to the angle of the rotating arm and a parameter table of the rotating arm angle corresponding to the gravity of the rotating arm into a PLC (programmable logic controller), and finishing setting a parameter table of the ironing roll device;
step three: starting the rolling mill equipment in the state of an empty reel, starting a coiler to coil a strip, and obtaining the current actual coil diameter D by a PLC (programmable logic controller) in the rolling mill equipment according to a formula D = V x i x 60/pi x n;
in the formula, V is the rolling speed of the strip, i is the reduction ratio of the coiling machine, and n is the real-time rotating speed of the coiling machine;
when the plastic rubber roller is selected, the PLC obtains an angle A required to control the rotating arm in real time according to the current actual roll diameter D and a parameter table corresponding to the roll diameter of the coiled material and the angle of the rotating arm; the PID takes the angle A of the rotating arm as a target set value, and controls the lifting hydraulic cylinder in a closed loop manner to enable the angle of the rotating arm to reach A; the plastic roller applies constant pressure to the coiled material under the action of the cylinder;
when a steel roller is selected, the PLC obtains the current angle A of the rotating arm according to the current actual roll diameter D and a parameter table of the roll diameter of the coiled material corresponding to the angle of the rotating arm, and then obtains the gravity G corresponding to the rotating arm at the moment according to the parameter table of the angle of the rotating arm corresponding to the gravity of the rotating arm; setting the pressure f required by the steel roller to the strip according to the process requirement by an operator; when the moment balance is achieved, the output force of the boom hydraulic cylinder is F, and the F is obtained by a formula F = (G + F)/K; the PID then performs closed-loop control of the hydraulic lift cylinder with the output force F of the boom cylinder as the target set value and the gravity G of the boom as the variable, causing the steel roll to apply the set pressure to the coil.
According to the technical scheme, the lifting hydraulic cylinders are in a pair, and the formula G =2 (P0S-P0 'S') K.
The technical scheme is further improved, and the pressure of the oil cavity end of the lifting hydraulic cylinder and the pressure of the rod end of the piston are controlled by a proportional valve.
Due to the adoption of the technical scheme, compared with the background technology, the invention has the following beneficial effects:
according to the invention, the parameter table of the rotating arm angle corresponding to the rotating arm gravity and the parameter table of the rotating arm angle corresponding to the rotating arm gravity can be conveniently obtained through a back-stepping method, the data of each machine component of the ironing roller device does not need to be precisely measured, the parameter table can be revised without mathematical modeling, and the problem of maintenance of an imported ironing roller device is solved.
The method of the invention reduces the maintenance difficulty of the ironing roller device, enables the ironing roller device to reliably operate, has the advantages of high timeliness, easy implementation and low cost, and is beneficial to the long-term development of enterprises.
Drawings
Fig. 1 is a schematic structural view of an ironing roller device.
Fig. 2 is a schematic diagram of a control circuit for a pair of lift cylinders.
In the figure: 1. a rotating arm; 2. swinging arms; 3. a lifting hydraulic cylinder; 4. a plastic roller; 5. a steel roll; 6. switching the hydraulic cylinder; 7. a cylinder; 8. a reel; 9. and (4) rolling the material into a roll.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
After a ironing roller device of an imported rolling mill continuously operates for several years, the ironing roller is frequently pressed and not firmly pressed or lifted too high at certain thickness points, so that a layer shifting phenomenon of a high-speed produced strip occurs, the production is influenced, and partial strips are scrapped. In addition, the rotating arm has a slight vibration phenomenon when being pressed. Repeated analysis and judgment show that the angle control of the rotating arm is not proper in certain roll diameter sections, so that the pressing force is too large when the ironing roller is not in contact with the coiled material or is in contact with the coiled material. In view of the reasons that the original control system of the device is complex and the maintenance cost is high, the invention discloses a control method of an ironing roller device, which is easy to implement and has low cost.
As shown in fig. 1, the ironing roll device belongs to a whole set of imported rolling mill equipment, and comprises a rotating arm 1 of which the rotating angle is controlled by a pair of hydraulic lifting cylinders 3, and an ironing roll switching mechanism is connected to the free end of the rotating arm 1. The ironing roller switching mechanism comprises a swing arm 2 hinged with the rotating arm 1, a plastic roller 4 and a steel roller 5 are connected to the free end of the swing arm 2, and the swing arm 2 is driven by a switching hydraulic cylinder 6 to realize switching of the plastic roller 4 and the steel roller 5. Wherein the pressure of the plastic roller 4 on the web 9 is provided by the cylinder 7.
A method of controlling an ironing roll apparatus, comprising the steps of:
the method comprises the following steps: determining a parameter table, the parameter table being determined by the steps of:
s1: measuring the diameter of the reel 8 in the empty reel 8 state, and recording as D0, D0=665 mm; switching the plastic roller 4 to a working position, controlling the lifting hydraulic cylinder 3 to press the plastic roller 4 on the empty reel 8, recording the angle A0 of the rotating arm 1 at the moment through an angle encoder of the ironing roller device, and then lifting the plastic roller 4;
s2: starting the coiling machine, coiling the coiled material 9 with a certain coiling diameter on the reel 8 on the premise of not losing tension, stopping the machine, and measuring and recording the coiling diameter D1 of the coiled material 9; controlling the lifting hydraulic cylinder 3 to press the plastic roller 4 on the coiled material 9, recording the angle A1 of the rotating arm 1 at the moment through an angle encoder, and then lifting the plastic roller 4;
s3: repeating S2, and respectively recording D2, D3, … Dn, A1, A2 and A3 … An to obtain a group of parameter tables corresponding to the roll diameter of the coiled material and the angle of the rotating arm;
s4: switching the steel roller 5 to a working position, controlling the lifting hydraulic cylinder 3 to stabilize the angle of the rotating arm 1 at the position A0, and recording oil pressures P0 and P0' at two ends of a piston of the lifting hydraulic cylinder 3; since the pair of hydraulic rams 3 is provided, G is calculated from the formula G =2 (P0 × S-P0 '× S')/K;
wherein G is the gravity of the end of the rotating arm 1, P0 is the pressure of the oil cavity end of the lifting hydraulic cylinder 3, P0 'is the pressure of the piston rod end of the lifting hydraulic cylinder 3, S is the cross-sectional area of the oil cavity end of the lifting hydraulic cylinder 3, S' is the cross-sectional area of the piston rod end of the lifting hydraulic cylinder 3, and K is the conversion coefficient of force;
s5: repeating S4 to obtain the gravity G1, G2 and G3 … Gn at the end of the rotating arm 1 when the angle of the rotating arm 1 is respectively stabilized at the positions A1, A2 and A3 … An, and obtaining a group of parameter tables corresponding to the rotating arm angle and the rotating arm gravity;
step two: inputting a parameter table corresponding to the roll diameter of the coiled material and the angle of the rotating arm and a parameter table corresponding to the gravity of the rotating arm into a PLC (programmable logic controller), and optimizing and revising the numerical values of all the parameter points by the PLC through a program to complete the setting of the parameter table of the ironing roll device; it should be noted that the more points the parameter table is acquired, the closer to the linear control, and the higher the corresponding control precision.
Step three: starting the rolling mill equipment in the state of an empty reel, starting a coiler to coil a strip, and obtaining the current actual coil diameter D by a PLC (programmable logic controller) in the rolling mill equipment according to a formula D = V x i x 60/pi x n;
in the formula, V is the rolling speed of the strip, i is the reduction ratio of the coiling machine, and n is the real-time rotating speed of the coiling machine;
when the plastic rubber roller 4 is selected, the PLC obtains an angle A required to control the rotating arm in real time according to the current actual roll diameter D and a parameter table corresponding to the roll diameter of the coiled material and the angle of the rotating arm. The PID controls the hydraulic lift cylinder 3 in a closed loop with the angle a of the boom 1 as a target setting value, so that the angle of the boom 1 reaches a. The plastic roller 4 applies a constant pressure to the web 9 under the action of the cylinder 7.
When the steel roller 5 is selected, the PLC obtains the current angle A of the rotating arm 1 according to the current actual roll diameter D and the parameter table of the roll diameter of the coiled material corresponding to the angle of the rotating arm, and then obtains the gravity G corresponding to the rotating arm 1 at the moment according to the parameter table of the angle of the rotating arm corresponding to the gravity of the rotating arm. The operator sets the pressure f needed by the steel roller to the strip according to the process requirement. When the moment balance is achieved, the output force of the boom hydraulic cylinder is F, and the F is obtained by a formula F = (G + F)/K; the PID then performs closed-loop control of the hydraulic lift cylinder 3 using the output force F of the boom cylinder as a target set value and the gravity G of the boom 1 as a variable, so that the steel roll 5 applies a set pressure to the coil 9.
As shown in fig. 2, the pressure at the chamber end and the pressure at the rod end of the pair of hydraulic rams 3 are controlled by a proportional directional control circuit. And the PID controls the proportional valve according to a signal fed back by the pressure transmitter to realize closed-loop control on the pressure of the oil cavity end of the lifting hydraulic cylinder 3 and the pressure of the piston rod end. Specifically, the piston rod ends and the oil chamber ends of the pair of hydraulic lifting cylinders 3 are respectively butted with the oil passages of the proportional valve to form a parallel structure. The parallel structure can make the pair of hydraulic lifting cylinders 3 reach the synchronization of height, and the balance of better effect is achieved. The pair of lifting hydraulic cylinders 3 can be adjusted by the opening degree of the hydraulic proportional valve PC05YVHS1, so that controllable adjustment of pressure is achieved. The pressure at two ends of the lifting hydraulic cylinder 3 is monitored in real time by the PC05BD1 and the PC05BD2, and is rapidly calculated by the PLC, so that the closed-loop control of the output force F of the rotary arm hydraulic cylinder is realized by PID.
According to the invention, the parameter table corresponding to the angle of the rotating arm 1 and the gravity of the rotating arm 1 and the parameter table corresponding to the angle of the rotating arm 1 and the gravity of the rotating arm 1 can be conveniently obtained by a back-pushing method, the parameter table can be revised without accurately measuring data of each machine component of the ironing roller device and performing mathematical modeling, and the problem of maintaining an imported ironing roller device is solved. The method reduces the maintenance difficulty of the ironing roller device, has the advantages of high timeliness, easy implementation and low cost, and is beneficial to the long-term development of enterprises.
The details of which are not described in the prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A control method of an ironing roll device belongs to the composition part of rolling mill equipment and comprises a rotating arm of which the rotating angle is controlled by a lifting hydraulic cylinder, wherein the free end of the rotating arm is connected with an ironing roll switching mechanism; the ironing roller switching mechanism comprises a swing arm hinged with the rotating arm, the free end of the swing arm is connected with a plastic roller and a steel roller, and the swing arm is driven by a switching hydraulic cylinder to realize the switching of the plastic roller and the steel roller; wherein, the pressure of moulding the rubber roll to the coiled material is provided by the cylinder, characterized by: the method comprises the following steps:
the method comprises the following steps: determining a parameter table, the parameter table being determined by the steps of:
s1: measuring the diameter of the reel in the empty reel state, and recording the diameter as D0; switching the plastic roller to a working position, controlling a lifting hydraulic cylinder to press the plastic roller on the empty reel, recording the angle A0 of the rotating arm at the moment through an angle encoder of the ironing roller device, and then lifting the plastic roller;
s2: starting a coiling machine, stopping the machine after coiling a coiled material with a certain coiling diameter on a reel on the premise of not losing tension, and measuring and recording the coiling diameter D1 of the coiled material; controlling a lifting hydraulic cylinder to press the plastic roller on the coiled material, recording the angle A1 of the rotating arm at the moment through an angle encoder, and then lifting the plastic roller;
s3: repeating S2, and respectively recording D2, D3, … Dn, A1, A2 and A3 … An to obtain a group of parameter tables corresponding to the roll diameter of the coiled material and the angle of the rotating arm;
s4: switching the steel roller to a working position, controlling a lifting hydraulic cylinder to stabilize the angle of a rotating arm at an A0 position, recording oil pressures P0 and P0 ' at two ends of a piston of the lifting hydraulic cylinder, and calculating G according to a formula G = (P0 × S-P0 ' × S ')/K;
in the formula, G is the gravity of the rotating arm end, P0 is the pressure of the oil cavity end of the lifting hydraulic cylinder, P0 'is the pressure of the piston rod end of the lifting hydraulic cylinder, S is the section area of the oil cavity end of the lifting hydraulic cylinder, S' is the section area of the piston rod end of the lifting hydraulic cylinder, and K is the conversion coefficient of force;
s5: repeating S4 to obtain gravity G1, G2 and G3 … Gn at the end of the rotating arm when the angle of the rotating arm is respectively stabilized at the positions A1, A2 and A3 … An, and obtaining a group of parameter tables corresponding to the angle of the rotating arm and the gravity of the rotating arm;
step two: inputting a parameter table of the coil diameter of the coiled material corresponding to the angle of the rotating arm and a parameter table of the rotating arm angle corresponding to the gravity of the rotating arm into a PLC (programmable logic controller), and finishing setting a parameter table of the ironing roll device;
step three: starting the rolling mill equipment in the state of an empty reel, starting a coiler to coil a strip, and obtaining the current actual coil diameter D by a PLC (programmable logic controller) in the rolling mill equipment according to a formula D = V x i x 60/pi x n;
in the formula, V is the rolling speed of the strip, i is the reduction ratio of the coiling machine, and n is the real-time rotating speed of the coiling machine;
when the plastic rubber roller is selected, the PLC obtains an angle A required to control the rotating arm in real time according to the current actual roll diameter D and a parameter table corresponding to the roll diameter of the coiled material and the angle of the rotating arm; the PID takes the angle A of the rotating arm as a target set value, and controls the lifting hydraulic cylinder in a closed loop manner to enable the angle of the rotating arm to reach A; the plastic roller applies constant pressure to the coiled material under the action of the cylinder;
when a steel roller is selected, the PLC obtains the current angle A of the rotating arm according to the current actual roll diameter D and a parameter table of the roll diameter of the coiled material corresponding to the angle of the rotating arm, and then obtains the gravity G corresponding to the rotating arm at the moment according to the parameter table of the angle of the rotating arm corresponding to the gravity of the rotating arm; setting the pressure f required by the steel roller to the strip according to the process requirement by an operator; when the moment balance is achieved, the output force of the lifting hydraulic cylinder is F, and the F is obtained by a formula F = (G + F)/K; the PID then performs closed-loop control of the hydraulic rams with the output force F of the hydraulic rams as the target set value and the weight G of the jib as the variable, causing the steel rolls to apply a set pressure to the coil.
2. A method of controlling an ironing roll apparatus according to claim 1, characterized by: the lifting hydraulic cylinders are in a pair, and the formula G =2 (P0S-P0 'S') K.
3. A method of controlling an ironing roll unit as claimed in claim 1 or 2, characterized by: the pressure of the oil cavity end of the lifting hydraulic cylinder and the pressure of the piston rod end are controlled by a proportional valve.
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| CN113930930A (en) * | 2021-09-10 | 2022-01-14 | 上海汉虹精密机械有限公司 | Cloth grass blockage detection alarm device and detection alarm method for high-speed ironing machine |
| CN114798742A (en) * | 2022-04-14 | 2022-07-29 | 云南浩鑫铝箔有限公司 | Automatic compensation method for correction coefficient of ironing rubber roll of cold rolling mill |
| CN114749489B (en) * | 2022-04-18 | 2023-09-08 | 中铝瑞闽股份有限公司 | Position control method for controlling window of wide aluminum cold finish rolling ironing roller and rubber roller belt |
| CN115569989B (en) * | 2022-10-09 | 2024-10-22 | 中铝铝箔(洛阳)有限公司 | Ironing roller pressure control structure of aluminum foil rolling mill and rolling staggered layer control method |
| CN118681923B (en) * | 2024-08-22 | 2024-11-08 | 优箔(洛阳)金属材料有限责任公司 | Aluminum foil rolling mill ironing device |
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| GB970411A (en) * | 1959-12-03 | 1964-09-23 | Davy & United Eng Co Ltd | Improvements in or relating to the control of tension of moving elongate material ina rolling mill |
| JPS60112556A (en) * | 1983-11-18 | 1985-06-19 | Kobe Steel Ltd | Ironing roller |
| CN102407238B (en) * | 2011-11-21 | 2014-01-01 | 中色科技股份有限公司 | Hydraulic control loop for ironing roller device |
| CN206997400U (en) * | 2017-05-05 | 2018-02-13 | 中色科技股份有限公司 | A kind of ironing roller device that can control ironing point |
| CN207787276U (en) * | 2018-01-04 | 2018-08-31 | 洛阳新远大冶金成套设备有限公司 | Coiled material ironing machine |
| CN110605298B (en) * | 2019-08-12 | 2023-07-04 | 中色科技股份有限公司 | Method for calculating hydraulic cylinder thrust of ironing roller based on VB application |
| CN111451291B (en) * | 2020-04-08 | 2021-04-02 | 鞍钢股份有限公司 | Method for improving coil shape quality of hot-rolled strip steel |
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