CN103182357A - Roller coater coating thickness automatic adjusting method - Google Patents
Roller coater coating thickness automatic adjusting method Download PDFInfo
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- CN103182357A CN103182357A CN2011104555265A CN201110455526A CN103182357A CN 103182357 A CN103182357 A CN 103182357A CN 2011104555265 A CN2011104555265 A CN 2011104555265A CN 201110455526 A CN201110455526 A CN 201110455526A CN 103182357 A CN103182357 A CN 103182357A
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Abstract
The invention provides a roller coater coating thickness automatic adjusting method used in a metal surface treatment device, which can overcome the disadvantage that the roll gap is adjusted by hands to adjust the coating thickness, and the automatic adjusting of the coating thickness can be completed according to a set value input in an industrial control computer system. The method comprises the following steps: inputting a technological parameter database made according to experience of technologists in the industrial control computer system in advance; installing a pressure sensor and a magnetoscale sensor on a roller coater, and making feedback a pressure signal and a displacement signal to form a double closed-loop control system; controlling the switching between a position closed loop and a pressure closed loop according to generator operation status by the industrial control computer system, and sending the signal to a PLC system; completing signal comparison of the feedback signal and set value in the PLC system; making the feedback of the generator operation status according to compared information by the PLC system to the industrial control computer system; driving a servo valve to control a hydraulic cylinder for completing the adjusting function, and realizing the automatic adjusting of the coating thickness.
Description
Technical field
The invention belongs to the adjust automatically field of metal surface treating device technical field, more particularly to coating for metal surfaces thickness and precision.
Background technology
The control of roller coat organic coating is always a problem on roller coating technology, and coating is too thin to influence the corrosion resistance of product, it is blocked up then waste coating, product it is less economical.Technologist adjusts coating layer thickness in the form of coating roller gap is manually adjusted always for a long time, and roll coater is operated using the experience of oneself.This manual control mode one is can not in time and accurately to control the thickness of paint film, two be excessively dependent on personal method custom, when production line production kind changes and changed paint species, or strip tension and speed are produced when fluctuating, influence can be produced on the coating of strip, thickness precision is directly influenced, considerable influence is brought to product quality.
The content of the invention
In order to overcome in original coating control technology can only by manually adjust the drawbacks of roll gap is to adjust coating layer thickness and avoid because the factors such as strip tension and speed produce fluctuation when influence to being produced with steel coating, the invention provides a kind of method of roller coat organic coating adjust automatically, the adjust automatically of roller coater coating thickness can be realized according to the setting value of input industrial computer system.
The technical solution adopted for the present invention to solve the technical problems is：The method of roller coater coating thickness adjust automatically, pressure sensor and magnetic scale sensor are arranged on roll coater, are collectively constituted double closed-loop control system with industrial computer system, PLC system and motor inverter, are comprised the following steps：
a：Roll gap, the relational database of pressure of a various coating and each roller of roll coater are produced, and inputs industrial computer system formation process parameter database；
b：Technological parameter database setting roll gap numerical value and roller rotating speed in product category and coating property and industrial computer system；
c：Pressure sensor collection pressure signal on roll coater, the pressure signal returned is transferred to PLC system after the motor inverter collection on production line through PROFIBUS, after being compared through PLC with the pressure value set, output signal to the controlling organization of roll coater, then executing agency is passed through, pressure between roller is adjusted, so as to form Stress control closed loop；
d：The magnetic scale sensor installed on roll coater, the displacement signal of return roll coater applicator roll delivers to industrial computer system after being gathered by signal interface board by ETHERNET, again PLC system is sent to through PROFIBUS, after being compared through PLC with the shift value set, output signal to the controlling organization of roll coater, then by executing agency, displacement between adjustment roller, forming position control closed loop；
e：Communicated between industrial computer system and PLC system by PROFIBUS, the comparison of feedback signal and setting value is completed in PLC system；
f：PLC system according to the information after comparing by unit operation condition feedback to industrial computer system, while driving servomechanism control hydraulic cylinder to complete the adjustment of roll gap, realize the adjust automatically of coating layer thickness.
It is that step c pressure signal includes the pressure signal between pressure signal between applicator roll and carrying roller and regulating roller and carrying roller.
It is that step c Stress control closed loop and step d position control closed loop constitute double closed-loop control system, in the case of normal coating, the switching between position closed loop and pressure closed loop loop is automatically controlled by industrial computer system according to unit operation situation.
Described double closed-loop control system uses PLC programmable controllers for control main body, and industrial computer is monitoring host computer, and closed-loop control is completed by using the pi regulator of PLC system.
Switching between described loop is based on following two situations：When roll coater has just been put into or production line operating mode influence of fluctuations coating occurs, position-force control is switched to；Pressure closed loop control is switched to when roll coater normally coats production.
The beneficial effects of the invention are as follows：
1. the present invention utilizes the pressure signal of displacement signal and the pressure sensor feedback of magnetic scale sensor feedback, with presetting after numerical value is compared, the regulation of servo valve control hydraulic cylinder completion roll gap is driven by PLC system, so as to realize the adjust automatically of roller coater coating thickness；
2. the present invention can be effectively guaranteed the control accuracy of roller coater coating thickness by continuing to optimize technological parameter database.
Brief description of the drawings
Fig. 1 is Row control block diagram
Embodiment
Roll coater is three-roller type, and its applicator roll, carrying roller and regulating roller are separately mounted on slideway, and pressure sensor and magnetic scale sensor are installed on roll coater；The feedback signal of pressure sensor is gathered by motor inverter, including the pressure signal between the pressure signal and regulating roller and carrying roller between applicator roll and carrying roller；The applicator roll displacement signal of magnetic scale sensor feedback is gathered by the signal interface board on production line.
It is the signal transduction process in control process shown in Fig. 1, steel plate color-coating line roll coater is three-roller type, and its applicator roll, carrying roller and regulating roller are separately mounted on slideway.Our control method is to take pressure and the close-loop control mode of position, pressure sensor is installed on roll coater, decomposition pressure ring, magnetic scale is installed in roll stand simultaneously, the position of applicator roll is detected and by the signal immediate feedback of acquisition, constitutes position ring, so system just constitutes a double loop system, the stability requirement that this closed-loop system is adjusted to equipment is higher, it is necessary to avoid because the change of two variables causes the concussion of control system, in order to avoid influence control effect.Technological parameter database setting roll gap numerical value and roller rotating speed in specific implementation first on host computer in product category and coating property and industrial computer system, and under desired coating layer thickness, corresponding pressure and the numerical value of displacement.When roller coat unit prepares to coat using position control, the roll gap numerical value and roller rotating speed of each roller of roll coater are determined according to product category and coating property and coating layer thickness, roll gap, the relational database of pressure of a various coating and each roller of roll coater are rule of thumb produced by technologist in advance, gap values between rollers and roller speed are inputted on host computer, roll coater is just carried out from motion tracking to this roll slot presetting definite value, magnetic scale will measure roll gap numeric feedback to system, it is compared by system with setting numerical value, so as to be adjusted to roll gap, this just constitutes position control closed loop.
When roll gap actual value reaches sets target, production line operating mode is also more stable simultaneously, now system will automatically switch to Stress control, according to pressure sensor numerical value change timely adjustment roll gap so as to reach the function of changing roll gap pressure, if and pre-set value has deviation, driving hydraulic cylinder adjusts the roller position of roll coater, realizes dynamic adjustment seam to change roll gap pressure, to reach the purpose of control coating layer thickness, this is Stress control ring.
Double closed-loop control system uses PLC programmable controllers for control main body, and industrial computer is monitoring host computer, and closed-loop control is completed by using the pi regulator of PLC system；Switching wherein between position closed loop and pressure closed loop loop is controlled by master system according to unit operation situation：Position-force control is carried out when roll coater has just been put into or production line operating mode influence of fluctuations coating occurs, displacement signal and setting value, which are sent to PLC system through PROFIBUS by industrial computer system and signal completed in PLC system, to be compared；Pressure closed loop control is carried out when roll coater normally coats production, setting value is sent to PLC system through PROFIBUS by industrial computer system and completes to be compared with pressure feedback signal.
Position is controlled and Stress control is used under different conditions, and system is general in normal coating production to be controlled using pressure closed loop, and position-force control is then used when roll coater has just been put into or production line operating mode influence of fluctuations coating occurs.Seamlessly transitting (i.e. carefree switching) mutually to Stress control is controlled to ensure that system is realized from position at any time, two control rings are tracked mutually, the setting value of inactive control ring is necessarily equal to the actual value of activity control ring, the input deviation for making inactive control ring is zero, and the output of the control ring must track the output of activity control ring, the switching under can thus realizing at any time is a kind of carefree switching.In the case of normal coating, the switching between position closed loop and pressure closed loop loop is produced by master system according to unit operation situation automatic decision.We use pi regulator for two closed-loop controls, to obtain the dynamic response of needs.The double closed-loop control system that we use in roll coater control, use PLC can cyclelog partially for control main body, industrial computer is monitoring host computer, completes closed-loop control by using the pi regulator of PLC system, forecast scheme configuration is as follows：
Signal acquisition is pressure signal and displacement signal, complete to transmit by motor inverter collection on production line and by DP networks, displacement signal is gathered by signal interface board and sends Upper system to, both signals are by network transmission to PLC control system, and driving servo valve control hydraulic cylinder completes adjusting control function.
Claims (5)
1. a kind of method of roller coater coating thickness adjust automatically, it is characterized in that：Pressure sensor and magnetic scale sensor are arranged on roll coater, are collectively constituted double closed-loop control system with industrial computer system, PLC system and motor inverter, are comprised the following steps：
a：Roll gap, the relational database of pressure of a various coating and each roller of roll coater are produced, and inputs industrial computer system formation process parameter database；
b：Technological parameter database setting roll gap numerical value and roller rotating speed in product category and coating property and industrial computer system；
c：Pressure sensor collection pressure signal on roll coater, the pressure signal returned is transferred to PLC system after the motor inverter collection on production line through PROFIBUS, after being compared through PLC with the pressure value set, output signal to the controlling organization of roll coater, then executing agency is passed through, pressure between roller is adjusted, so as to form Stress control closed loop；
d：The magnetic scale sensor installed on roll coater, the displacement signal of return roll coater paint roller delivers to industrial computer system after being gathered by signal interface board by ETHERNET, again PLC system is sent to through PROFIBUS, after being compared through PLC with the shift value set, output signal to the controlling organization of roll coater, then by executing agency, displacement between adjustment roller, forming position control closed loop；
e：Communicated between industrial computer system and PLC system by PROFIBUS, the comparison of feedback signal and setting value is completed in PLC system；
f：PLC system according to the information after comparing by unit operation condition feedback to industrial computer system, while driving servomechanism control hydraulic cylinder to complete the adjustment of roll gap, realize the adjust automatically of coating layer thickness.
2. a kind of method of roller coater coating thickness adjust automatically as claimed in claim 1, it is characterised in that step c pressure signal includes the pressure signal between pressure signal and regulating roller and sizing roller between applicator roll and sizing roller.
3. a kind of method of roller coater coating thickness adjust automatically as claimed in claim 1, it is characterized in that step c Stress control closed loop and step d position control closed loop constitute double closed-loop control system, in the case of normal coating, the switching between position closed loop and pressure closed loop loop is automatically controlled by industrial computer system according to unit operation situation.
4. a kind of method of roller coater coating thickness adjust automatically as claimed in claim 3, it is characterized in that, described double closed-loop control system uses PLC programmable controllers for control main body, and industrial computer is monitoring host computer, and closed-loop control is completed by using the pi regulator of PLC system.
5. a kind of method of roller coater coating thickness adjust automatically as claimed in claim 3, it is characterised in that the switching between described loop is based on following two situations：When roll coater has just been put into or production line operating mode influence of fluctuations coating occurs, position-force control is switched to；Pressure closed loop control is switched to when roll coater normally coats production.
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| CN201110455526.5A CN103182357B (en) | 2011-12-30 | 2011-12-30 | The self-adjusting method of roller coater coating thickness |
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| CN201110455526.5A CN103182357B (en) | 2011-12-30 | 2011-12-30 | The self-adjusting method of roller coater coating thickness |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510085A (en) * | 2013-10-09 | 2014-01-15 | 鞍钢股份有限公司 | Coating roller position control method capable of reducing consumption of passivation solution |
| CN104384415A (en) * | 2014-11-13 | 2015-03-04 | 天津市天锻压力机有限公司 | Aluminum alloy wheel hub forging automatic production line control system |
| CN104451502A (en) * | 2014-11-08 | 2015-03-25 | 马钢(集团)控股有限公司 | Film thickness control method for posttreatment of galvanized wire |
| CN107841743A (en) * | 2017-09-28 | 2018-03-27 | 北京首钢自动化信息技术有限公司 | A kind of control device and method of passivation painting machine thickness for zinc wire of aluminizing |
| CN108693841A (en) * | 2017-04-10 | 2018-10-23 | 株式会社日立制作所 | Manufacturing system and manufacturing method |
| CN111736548A (en) * | 2020-06-09 | 2020-10-02 | 浙江双元科技开发有限公司 | Automatic adjusting and controlling system and method for banner of foil forming machine |
| CN112126938A (en) * | 2020-08-31 | 2020-12-25 | 首钢智新迁安电磁材料有限公司 | Method and device for controlling surface quality of strip steel |
| CN112281133A (en) * | 2020-10-28 | 2021-01-29 | 哈尔滨工业大学 | Harmonic oscillator film thickness distribution and uniformity correction method |
| CN113245129A (en) * | 2021-06-07 | 2021-08-13 | 马进 | Precision control method for roller coater of hot galvanizing production line |
| CN113798130A (en) * | 2021-10-13 | 2021-12-17 | 江苏集萃新型药物制剂技术研究所有限公司 | Integrated equipment and method for preparing and coating hot melt adhesive |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510085A (en) * | 2013-10-09 | 2014-01-15 | 鞍钢股份有限公司 | Coating roller position control method capable of reducing consumption of passivation solution |
| CN104451502A (en) * | 2014-11-08 | 2015-03-25 | 马钢(集团)控股有限公司 | Film thickness control method for posttreatment of galvanized wire |
| CN104384415A (en) * | 2014-11-13 | 2015-03-04 | 天津市天锻压力机有限公司 | Aluminum alloy wheel hub forging automatic production line control system |
| CN108693841A (en) * | 2017-04-10 | 2018-10-23 | 株式会社日立制作所 | Manufacturing system and manufacturing method |
| CN107841743A (en) * | 2017-09-28 | 2018-03-27 | 北京首钢自动化信息技术有限公司 | A kind of control device and method of passivation painting machine thickness for zinc wire of aluminizing |
| CN107841743B (en) * | 2017-09-28 | 2019-12-06 | 北京首钢自动化信息技术有限公司 | Device and method for controlling thickness of passivation coating machine for aluminum-plated zinc wire |
| CN111736548A (en) * | 2020-06-09 | 2020-10-02 | 浙江双元科技开发有限公司 | Automatic adjusting and controlling system and method for banner of foil forming machine |
| CN111736548B (en) * | 2020-06-09 | 2024-10-29 | 浙江双元科技股份有限公司 | Automatic banner adjusting control system and method for foil producing machine |
| CN112126938A (en) * | 2020-08-31 | 2020-12-25 | 首钢智新迁安电磁材料有限公司 | Method and device for controlling surface quality of strip steel |
| CN112126938B (en) * | 2020-08-31 | 2023-01-10 | 首钢智新迁安电磁材料有限公司 | Method and device for controlling surface quality of strip steel |
| CN112281133A (en) * | 2020-10-28 | 2021-01-29 | 哈尔滨工业大学 | Harmonic oscillator film thickness distribution and uniformity correction method |
| CN112281133B (en) * | 2020-10-28 | 2021-09-07 | 哈尔滨工业大学 | Harmonic oscillator film thickness distribution and uniformity correction method |
| CN113245129A (en) * | 2021-06-07 | 2021-08-13 | 马进 | Precision control method for roller coater of hot galvanizing production line |
| CN113798130A (en) * | 2021-10-13 | 2021-12-17 | 江苏集萃新型药物制剂技术研究所有限公司 | Integrated equipment and method for preparing and coating hot melt adhesive |
| CN113798130B (en) * | 2021-10-13 | 2022-05-17 | 江苏集萃新型药物制剂技术研究所有限公司 | Integrated equipment and method for preparing and coating hot melt adhesive |
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Denomination of invention: Automatic adjustment method of coating thickness of roller coater Effective date of registration: 20220518 Granted publication date: 20151104 Pledgee: Xiamen International Bank Co.,Ltd. Beijing Branch Pledgor: STARGROUP RESEARCH & INTEGRATION Co.,Ltd. Registration number: Y2022990000282 |
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