CN113458182B - Roll gap close-control zero-adjusting method and system for hot rolling flat wire uncoiling area straightener - Google Patents
Roll gap close-control zero-adjusting method and system for hot rolling flat wire uncoiling area straightener Download PDFInfo
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- CN113458182B CN113458182B CN202010243347.4A CN202010243347A CN113458182B CN 113458182 B CN113458182 B CN 113458182B CN 202010243347 A CN202010243347 A CN 202010243347A CN 113458182 B CN113458182 B CN 113458182B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a roll gap near-control zero-adjusting method and a roll gap near-control zero-adjusting system of a hot rolling flat wire uncoiling area straightener, and the method comprises the following processes: 1) Inputting a thickness value of the sample rod; 2) Keeping the roll gap clear value; 3) Starting a zero-adjustment button; 4) Saving as a zero-tuning mode; 5) Starting zero-adjustment monitoring; 6) Selecting a zero modulation mode; 7) The working mode of the straightener; 8) Setting the roll gap as a zero-adjustment set value; 9) A roll gap adjuster; 10 Driving the straightener oil cylinder to press down; 11 The actual roll gap value = the actual roll gap value under pressure + the offset of the oil cylinder position; 12 Pressure of an oil cylinder of the straightening machine reaches a zero-adjustment set value; 13 Actual roll gap value = clean roll gap value. The fixed field near-control operation box for the uncoiling area of the existing flat wire overcomes the defects that the fixed field near-control operation box for the uncoiling area of the existing flat wire has large volume and large sight blocking, the wiring engineering is large, the cost of an input/output module is high, the operation interface cannot be changed, and the like.
Description
Technical Field
The invention relates to a roll gap zero-adjusting technology of a hot rolling flat wire uncoiling area straightener, in particular to a roll gap close-control zero-adjusting method and a roll gap close-control zero-adjusting system of the hot rolling flat wire uncoiling area straightener.
Background
In domestic and foreign iron and steel enterprises, a flat wire uncoiling area mainly comprises a feeding trolley, a height centering device, a supporting arm, an uncoiler, a deep bending roll, a head opener, an inlet pinch roll, a straightener and the like, and the purpose is to sleeve a steel coil on the feeding trolley on the uncoiler, and then penetrate the head of a strip steel into the inlet pinch roll and the straightener by the head opener to finish the strip threading action at the head. With the improvement of the existing automatic and intelligent control technology, the feeding threading control of the uncoiling area is converted from the original semi-automatic control into the full-automatic control, but in order to process the abnormity (such as too small inner ring of the incoming steel coil, flat coil, tower shape and the like) and facilitate the maintenance of the equipment, the manual near control operation function is necessary, so the electrical control of the uncoiling area equipment of the leveling wire comprises the automatic, semi-automatic and manual processing functions.
The traditional manual close control operation adopts a field machine side operation box mode, namely, a machine side operation box is arranged beside a flattening wire uncoiling area, operation buttons, action signals and the like of all devices in the uncoiling area are arranged, the signals are connected to an input/output board card of an electrical room control PLC through construction wiring, and then the action of all the devices is controlled by a control program of the PLC.
With the continuous improvement of labor efficiency in recent years, fewer field operation posts are provided, the centralized control is basically performed in a main operation room, and manual close control to the machine is required only when an automatic mode fails or is abnormal. The existing operation mode of the nearby control operation box has the following disadvantages:
1) The operation box has larger volume, compact full-automatic operating line equipment and difficult arrangement, and is easy to block the sight of operators in the master control room;
2) The operation buttons and switches on the operation box are more, the cable quantity is larger, and the wiring engineering quantity is correspondingly higher;
3) The PLC has a plurality of IO modules, and the operation buttons of a near control operation box of the traditional operating line occupy about 1/3 of IO points of the PLC;
4) Paying attention to the fact that manual operation state display is weak, if more complete state display is needed, operation panels such as OP (operational plane) are needed to be added, the cost is increased, and the volume of an operation box is increased;
5) Function expansion is almost impossible, and once the design, manufacture and installation of the proximity control operation box are completed, the proximity control operation box needs to be replaced again when work is required to be done for expansion.
The straightener is an important device for the uncoiling area of a hot-rolling leveling line, is used for straightening the head of strip steel during threading, and for strip steel with different specifications, the straightener needs to control different roll gaps to flatten the head of the strip steel so as to facilitate threading. The roll gap of the straightener is measured by adopting an oil cylinder position sensor to measure the stroke of an oil cylinder, but due to the reasons of abrasion, replacement and the like of the straightener roll gap value deviation of the straightener can be caused, the straightening quality of strip steel is influenced, the production problems of difficult strip threading and the like are caused, and therefore, the roll gap of the straightener needs to be regularly calibrated in a zero adjustment mode.
The zero adjustment calibration mode of the existing straightener is as follows: and (3) placing the zero-adjustment standard sample rod between an upper roller and a lower roller of the straightening machine, pressing down the upper roller, and when the upper roller is just close to the upper end of the sample rod, determining the thickness value of the sample rod as the roll gap value of the straightening machine.
The zero adjustment operation of the straightener in the prior art has the following problems:
1) Poor zero adjustment precision: during the traditional zero adjustment operation, the roll gap zero adjustment adopts the position monitoring of the oil cylinder, the roll gap of the straightening machine needs to be manually pressed down by an operator, and if the operation is improper, the roll gap of the straightening machine is too small, so that the zero adjustment sample rod is often damaged (such as deformation and pressure breakage);
2) The zero adjustment operation has high requirement and complicated process: in the traditional zero adjustment operation, an operator fixes an operation position on site, not only manually operates a button, but also observes the roll gap condition of an actual straightener, and cannot realize effective monitoring and real-time intervention in the whole zero adjustment process;
3) The zero adjustment operation efficiency is low: during traditional zero adjustment operation, the roll gap value of the straightening machine needs to be manually measured and confirmed for many times by an operator on site by using a feeler gauge, so that the operation is dangerous and the zero adjustment operation efficiency is low;
4) The zero adjustment operation intensity is high: during traditional zero adjustment operation, an operator needs to operate a button by a program to adjust the position of a roll gap of the straightening machine, and manually measures and confirms the position for multiple times by using a feeler gauge on site; when the roll gap is manually measured, four point roll gap data including an inlet and an outlet on the working side of the straightening machine and an inlet and an outlet on the transmission side of the straightening machine need to be measured, and the four point roll gap data are adjusted by operating buttons until the roll gap data of the four points reach the reference requirement, so that the operation intensity of the straightening machine in the zero adjustment operation process is high.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a roll gap proximity control zero adjustment method and a roll gap proximity control zero adjustment system for a hot-rolled flat wire uncoiling area straightener, which overcome the defects that a fixed field proximity control operation box in the uncoiling area of the existing flat wire has large volume and large sight blocking line, large wiring engineering, high input and output module cost, unchangeable operation interface and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
on one hand, the roll gap proximity control zero adjustment method of the hot-rolled flat wire uncoiling area straightener comprises the following processes:
1) Inputting the thickness set value of the zero-adjustment standard sample rod on the portable near control device, and synchronously sending the thickness set value to the straightening machine PLC;
2) The thickness set value is stored as a roll gap clear zero value by the straightening machine PLC;
3) Starting a zero adjustment command on the portable near control device, and simultaneously synchronously sending the zero adjustment starting command to the PLC of the straightener;
4) The straightener PLC saves a zero-tuning starting command as a zero-tuning mode;
5) Judging whether a zero-tuning mode is selected or not by a control program in the straightening machine PLC, if the zero-tuning mode is not selected, continuing to execute a control program of a normal working mode of the straightening machine by the control program in the straightening machine PLC, and if the zero-tuning mode is selected, executing the step 6);
6) The straightening machine PLC sets the roll gap set value of the straightening machine as a zero-adjustment set value;
7) The output of a roller seam closed-loop controller in the straightener PLC drives a straightener oil cylinder to press down through a proportional valve controller;
8) The method comprises the following steps that (1) actual roll gap feedback of a roll gap closed-loop controller in a straightener PLC is a roll gap actual value, and the actual roll gap value of the roll gap closed-loop controller = a pressed actual roll gap value + an oil cylinder position offset;
9) Monitoring pressure feedback of an oil cylinder of the straightener by the straightener PLC, judging that an upper roller of the straightener is pressed to a zero-adjustment standard sample rod when the pressure reaches a zero-adjustment pressure set value by the straightener PLC, and correcting an actual roller gap value of a roller gap closed-loop controller to be a thickness set value of the zero-adjustment standard sample rod;
10 The PLC of the straightener assigns the zero-setting value of the roll gap to the actual roll gap value under the pressure to finish the zero-setting process of the roll gap of the straightener.
And the portable near control device establishes communication with the straightening machine PLC through a WIFI signal.
And 4) after the step 4) is finished, synchronously transmitting the process data in the PLC of the straightening machine to the portable near control device through the WIFI signal, and monitoring the process data of the zeroing through the portable near control device.
The straightener oil cylinder comprises an outlet straightener oil cylinder and an inlet straightener oil cylinder, and a pressure sensor and a position sensor are installed on the straightener oil cylinder.
And the PLC of the straightening machine monitors the pressure feedback of the oil cylinder of the straightening machine = the feedback value of the pressure sensor and the area of the rodless cavity of the oil cylinder.
And 8), feeding back the position information of the oil cylinder of the straightening machine by the position sensor according to the actual roll gap value.
In the step 9), the set value of the zero-adjusting pressure is between 3 and 5 tons.
The portable near control device sends a heartbeat message to the straightening machine PLC once every 100ms, and the straightening machine PLC verifies the heartbeat message sent by the portable near control device once every 100 ms.
On the other hand, the roll gap proximity control zero adjustment system of the hot-rolled flat wire uncoiling area straightener comprises the straightener PLC and a portable proximity control device;
the portable near control device establishes WIFI communication with the straightener PLC through the wireless AP, and the straightener PLC reads an operation instruction in communication data of the portable near control device; and also comprises
The base is arranged beside the straightening machine in the uncoiling area of the flat wire, and an NFC identification card, an emergency stop switch and a selection switch are arranged on the base;
the NFC identification card is used for identifying the position of the portable proximity control device and generating positioning information to the straightening machine PLC, and the straightening machine PLC locks the remote roll gap zero adjustment operation authority and opens the near control roll gap zero adjustment operation authority of the portable proximity control device;
the emergency stop switch is connected to the straightening machine PLC through a hard wire;
the selection switch is used for locking the roll gap zero-adjustment operation authority of the portable near control device and the straightening machine PLC.
And an Android operating system is loaded in the portable proximity control device.
And the portable near control device is communicated with the straightening machine PLC through the Ethernet.
In the technical scheme, the roll gap near-control zero-adjusting method and the roll gap near-control zero-adjusting system for the straightening machine in the uncoiling area of the hot rolling flat wire reduce the labor intensity of operators by adopting an automatic zero-adjusting mode, and simultaneously adopt the portable near-control device as a field near-control operating device, so that the operators are not limited by positions in the process of observing the zero-adjusting action of the straightening machine, can drive the portable near-control device to walk, and can directly observe observation points of various parts such as the transmission side, the operation side, the inlet, the outlet and the like of the straightening machine. The concrete effects are as follows:
1) The zero adjustment precision is improved, the roll gap zero adjustment is monitored by adopting the oil cylinder pressure and the oil cylinder position, when the zero adjustment pressure is reached, the roll gap set value of the straightening machine is set to a zero adjustment clear value through the PLC, the roll gap setting of the straightening machine is quantitative, and the zero adjustment sample rod is ensured not to be damaged;
2) The roll gap zero adjustment adopts a portable near control device, an operator can carry the portable near control device to conveniently reach all parts such as a transmission side, a working side, an inlet, an outlet and the like of the straightening machine to observe the actual action of the straightening machine, and can monitor process data during automatic zero adjustment to realize the effective monitoring and real-time intervention of the whole zero adjustment process;
3) The automatic zero adjustment device has the advantages that the zero adjustment operation efficiency is improved, the zero adjustment operation intensity is reduced, an operator only needs to put the zero adjustment sample rod between the roll gaps of the straightening machine and then starts the zero adjustment sample rod by one key on the portable near control device, the automatic zero adjustment process can be completed, the zero adjustment operation efficiency is greatly improved, and the zero adjustment operation intensity is greatly reduced.
Drawings
FIG. 1 is a logic block diagram of the present invention approach control zeroing method;
FIG. 2 is a schematic structural view of a straightener in the method of near-controlled zero-tuning of the present invention;
FIG. 3 is a roll gap zero-tuning control block diagram of the straightener by the near control zero-tuning method of the invention;
FIG. 4 is a flow chart of a conventional PLC control program;
FIG. 5 is a schematic flow chart of a PLC control program of the method for near-control zero-tuning of the present invention;
FIG. 6 is a schematic diagram of the architecture of the near-control zeroing system of the present invention;
FIG. 7 is a schematic view showing the portable proximity control device in FIG. 6 being in communication with a straightener PLC.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
As shown in FIG. 1, the roll gap proximity control zero adjustment method of the hot rolling flat wire uncoiling area straightener provided by the invention comprises the following processes:
1) Inputting a thickness value of a sample rod:
an operator inputs a thickness set value of the zero-adjustment standard sample rod on the portable near control device, the portable near control device synchronously sends the thickness set value to the straightening machine PLC through a WIFI signal, and the straightening machine PLC stores the thickness set value as a roll gap clear value;
2) Keeping the roll gap clear value as follows:
a communication synchronization module in the straightening machine PLC stores data introduced from the portable near control device into a control program;
3) Starting a zero-adjustment button:
an operator presses a button for starting a zero-tuning command on the portable near control device, the portable near control device synchronously sends the zero-tuning starting command to the straightening machine PLC through a WIFI signal at the same time, and the straightening machine PLC stores the zero-tuning starting command into a zero-tuning mode;
4) Saving as a zero-tuning mode:
a communication synchronization module in the straightening machine PLC stores data introduced from the portable near control device into a data block in a control program;
5) Starting zero-tone monitoring:
after the operation is completed by an operator, the straightening machine PLC can automatically complete the zero adjustment process, at the moment, the process data in the straightening machine PLC can be synchronously transmitted to the portable near control device through the WIFI signal, the operator can monitor the zero adjustment process data through the portable near control device, and the portable near control device is used near a field machine, so that the operator can observe the actual zero adjustment action execution condition of the straightening machine while monitoring the process data to avoid abnormity;
6) Zero-tone mode selection:
judging whether a zero-tuning mode is selected by a control program in the straightener PLC, if the zero-tuning mode is not selected, continuing to execute a control program of a normal working mode of the straightener by the control program in the straightener PLC, and if the zero-tuning mode is selected, gating a zero-tuning zero-clearing control loop;
7) The working mode of the straightener is as follows:
a zero-adjusting zero-clearing control loop in the straightener PLC is disconnected, and a normal straightener working mode is executed;
8) The roll gap is set to a zero-adjustment set value:
the straightening machine PLC sets a roll gap set value of the straightening machine to a zero-adjustment set value, the size of the zero-adjustment set value depends on a mechanical mechanism of the straightening machine, the zero-adjustment set value is larger than a pressing total stroke of the straightening machine, namely, the roll gap closed-loop controller is enabled to open a loop when the zero-adjustment is carried out, and the actual value of the pressing roll gap never reaches the set value;
9) A roll gap adjuster:
a roll seam closed-loop controller in the straightening machine PLC;
10 Drive straightener cylinder down:
the output of a roller seam closed-loop controller in the straightening machine PLC drives a cylinder of the straightening machine to press down through a proportional valve controller;
11 Actual roll gap value of the roll gap closed-loop controller = actual roll gap value under press + offset of cylinder position:
the method comprises the following steps that (1) the actual roll gap feedback of a roll gap closed-loop controller in a straightener PLC (programmable logic controller), namely the actual roll gap value, is fed back by a position sensor arranged in an oil cylinder of the straightener, the position information of the oil cylinder is fed back, and the actual roll gap value of the roll gap closed-loop controller = the actual roll gap value under pressing plus the offset of the oil cylinder position;
12 ) straightener oil cylinder pressure reaches zero set value:
the pressure feedback of the oil cylinder of the straightening machine is monitored by the PLC at the same time, and the pressure measured by a pressure sensor used for pneumatic power/hydraulic pressure in engineering application refers to the pressure intensity of a pipeline or the oil cylinder, so that the pressure needs to be calculated, wherein the pressure = the feedback value of the pressure sensor of the oil cylinder of the straightening machine is the area (constant) of a rodless cavity of the oil cylinder. When the pressure reaches a zero-adjustment pressure set value (determined according to the mechanical structure of the straightener and generally 3-5 tons), the straightener PLC judges that the upper roller of the straightener presses the zero-adjustment standard sample rod, and the actual roll gap value of the roll gap closed-loop controller is corrected to be the thickness set value of the zero-adjustment standard sample rod, namely the thickness set value of the zero-adjustment standard sample rod input by an operator;
13 Actual roll gap value = clean roll gap value:
and assigning a roll gap clear value (a thickness set value of a zero-adjustment standard sample rod input by an operator) to a pressed actual roll gap value by the PLC of the straightener to finish the roll gap zero-adjustment process of the straightener.
As shown in fig. 2, a zero adjustment standard sample rod 1 is placed between an upper roll 2 and a lower roll 3 of a leveler, an inlet cylinder position sensor 5 and an inlet cylinder pressure sensor 6 are mounted on a leveler oil cylinder 4 on the inlet side of the leveler, and an outlet cylinder position sensor 8 and an outlet cylinder pressure sensor 9 are mounted on a leveler oil cylinder 7 on the outlet side of the leveler.
As shown in figure 3, when the straightening machine is subjected to zero adjustment, two standard zero adjustment sample rods are inserted between an upper roller and a lower roller at two sides of the straightening machine by a field operator, the thickness of the standard sample rods is set on a field portable near control device, a calibration button of the straightening machine on the portable near control device is pressed, a zero adjustment mode selection 10 is switched on, meanwhile, a roll gap set value 11 is automatically set to be a zero adjustment roll gap value, a roll gap regulator 12 starts adjustment, a servo valve controller 13 is driven to press down a straightening machine oil cylinder 14, a position sensor 15 arranged on the straightening machine oil cylinder 14 detects the stroke of the position of the straightening machine oil cylinder 14, the oil cylinder position value is converted into a roll gap feedback value through a roll gap/position adapter AP16 and is fed back to the roll gap regulator 12, and closed-loop control is formed.
Meanwhile, a pressure sensor 17 arranged on the straightening machine oil cylinder 14 sends a detected pressure signal of the straightening machine oil cylinder 14 to an equality comparator 18, the equality comparator 18 converts the pressure signal into a roller pressure and then compares the roller pressure with a zero-adjustment pressure set value, when the roller pressure signal and the zero-adjustment pressure set value are equal, the roller gap is considered to be just dead-pressed by a standard zero-adjustment sample rod, at the moment, a zero clearing value of the roller gap (the thickness value of the standard sample rod is set through a portable near control device) is sent to a roller gap/position adapter AP16, the roller gap is cleared, and the zero-adjustment process is completed.
As shown in figures 4 and 5, the near-control zero-tuning method changes the traditional control mode of the straightening machine PLC, reads the operation instruction from the communication data of the portable near-control device and does not use the traditional digital quantity input/output template.
In order to prevent communication between the portable near control device and the straightening machine PLC from being abnormal, the portable near control device sends a heartbeat message to the straightening machine PLC once every 100ms, the straightening machine PLC verifies the heartbeat message sent by the portable near control device once every 100ms, and if errors occur, the operation is locked, and the reliability of communication is ensured.
As shown in FIGS. 6 and 7, the invention also provides a roll gap proximity zero-adjusting system of the straightener in the uncoiling area of the hot-rolled flat wire, which comprises a straightener PLC20 and a portable proximity control device 21 which can move beside the straightener in the uncoiling area of the hot-rolled flat wire.
The portable near control device 21 establishes WIFI communication 23 with the straightening machine PLC20 through the two wireless APs 22, and the straightening machine PLC20 reads an operation instruction in communication data of the portable near control device 21.
Also comprises
And the base 24 is arranged at an operation point beside the straightening machine in the uncoiling area of the flat wire, and the base 24 is provided with an NFC identification card, an emergency stop switch and a selection switch with a key.
The selection switch is used for locking the operation of the portable near control device 21, when the portable near control device 21 is inserted into the base 24, the straightening machine PLC20 obtains the operation position of the portable near control device 21, locks the remote operation authority and opens the near control operation authority of the portable near control device 21, and if the selection switch key on the base 24 is opened to the locking position, the near control operation of the portable near control device 21 is also locked besides the locking of the remote operation; when the portable proximity control device 21 is not inserted into the base 24, the selection switch is disabled.
The emergency stop switch is connected to the straightener PLC20 through a hard wire, and safety of equipment and personnel is guaranteed.
The Android operating system is loaded in the portable near control device 21, platform development and interfaces are complete, and platform support and expandability are strong.
The portable near control device 21 can also establish communication with the straightening machine PLC20 through Ethernet, which is different from other common pad equipment.
The portable near control device 21 and the straightening machine PLC20 are communicated by adopting an open-source bottom library, so that the structure is complete, and the communication real-time performance is strong.
The application layer of the portable near control device 21 adopts a standard Android APP development environment, and has strong extensible and upgrading capabilities.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a hot rolling levelling line area straightener roll gap proximity control zero-adjusting system of decoiling which characterized in that: comprises a straightening machine PLC and a portable near control device;
the portable near control device establishes WIFI communication with the straightener PLC through the wireless AP, and the straightener PLC reads an operation instruction in communication data of the portable near control device; also comprises
The base is arranged beside the straightening machine in the uncoiling area of the flat wire, and an NFC identification card, an emergency stop switch and a selection switch are arranged on the base;
the NFC identification card is used for identifying the position of the portable proximity control device and generating positioning information to the straightener PLC, and the straightener PLC locks the remote roll gap zero adjustment operation authority and opens the near control roll gap zero adjustment operation authority of the portable proximity control device;
the emergency stop switch is connected to the straightening machine PLC through a hard wire;
the selection switch is used for locking the roll gap zero-adjustment operation authority of the portable proximity control device and the straightening machine PLC,
the roll gap proximity zero-adjusting system of the hot-rolled flat wire uncoiling area straightener is used for executing a roll gap proximity zero-adjusting method of the hot-rolled flat wire uncoiling area straightener, and comprises the following processes:
1) Inputting the thickness set value of the zero-adjustment standard sample rod on the portable near control device, and synchronously sending the thickness set value to the straightening machine PLC;
2) The thickness set value of the straightener PLC is stored as a roll gap clear zero value;
3) Starting a zero adjustment command on the portable near control device, and simultaneously synchronously sending the zero adjustment starting command to the PLC of the straightener;
4) The straightener PLC saves a zero-tuning starting command as a zero-tuning mode;
5) Judging whether a zero adjustment mode is selected by a control program in the straightener PLC, if the zero adjustment mode is not selected, continuing to execute a control program of a normal working mode of the straightener by the control program in the straightener PLC, and if the zero adjustment mode is selected, executing the step 6);
6) The straightening machine PLC sets the roll gap set value of the straightening machine as a zero-adjustment set value;
7) The driving output of a roller seam closed-loop controller in the straightening machine PLC drives a straightening machine oil cylinder to press down through a proportional valve controller;
8) The method comprises the following steps that (1) actual roll gap feedback of a roll gap closed-loop controller in a straightener PLC is a roll gap actual value, and the actual roll gap value of the roll gap closed-loop controller = a pressed actual roll gap value + an oil cylinder position offset;
9) Monitoring pressure feedback of an oil cylinder of the straightening machine by the PLC of the straightening machine, judging that an upper roller of the straightening machine presses a zero-adjustment standard sample rod when the pressure reaches a zero-adjustment pressure set value, and correcting an actual roller gap value of a roller gap closed-loop controller to be a thickness set value of the zero-adjustment standard sample rod at the moment;
10 The PLC of the straightener assigns the zero-setting value of the roll gap to the actual roll gap value under the pressure to finish the zero-setting process of the roll gap of the straightener.
2. The roll gap proximity control zero-adjusting system of the hot-rolled flat wire uncoiling area straightener of claim 1, characterized in that: and the portable near control device establishes communication with the straightening machine PLC through a WIFI signal.
3. The roll gap proximity control zero-adjusting system of the hot-rolled flat wire uncoiling area straightener of claim 2 is characterized in that: and 4) after the step 4) is finished, the process data in the straightener PLC are synchronously transmitted to the portable near control device through the WIFI signal, and the process data of the zero adjustment can be monitored through the portable near control device.
4. The roll gap proximity control zero-adjusting system of the hot-rolled flat wire uncoiling area straightener of claim 1, characterized in that: the oil cylinder of the straightening machine comprises an outlet straightening machine oil cylinder and an inlet straightening machine oil cylinder, and a pressure sensor and a position sensor are installed on the oil cylinder of the straightening machine.
5. The roll gap proximity control zero-adjusting system of the hot-rolled flat wire uncoiling area straightener of claim 4, characterized in that: and the PLC of the straightening machine monitors the pressure feedback of the oil cylinder of the straightening machine = the feedback value of the pressure sensor and the area of the rodless cavity of the oil cylinder.
6. The roll gap proximity control zero-adjusting system of the hot-rolled flat wire uncoiling area straightener of claim 4, characterized in that: and 8), feeding back the position information of the oil cylinder of the straightening machine by the position sensor according to the actual roll gap value.
7. The roll gap proximity control zero-adjusting system of the hot-rolled flat wire uncoiling area straightener of claim 4 is characterized in that: in the step 9), the set value of the zero-adjustment pressure is between 3 and 5 tons.
8. The roll gap proximity control zero-adjusting system of the hot-rolled flat wire uncoiling area straightener of claim 1 is characterized in that: the portable near control device sends a heartbeat message to the straightening machine PLC once every 100ms, and the straightening machine PLC verifies the heartbeat message sent by the portable near control device once every 100 ms.
9. The roll gap proximity control zero-adjusting system of the hot-rolled flat wire uncoiling area straightener of claim 1 is characterized in that: and an Android operating system is loaded in the portable proximity control device.
10. The roll gap proximity control zero-adjusting system of the hot-rolled flat wire uncoiling area straightener of claim 1, characterized in that: and the portable near control device is communicated with the straightening machine PLC through the Ethernet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010243347.4A CN113458182B (en) | 2020-03-31 | 2020-03-31 | Roll gap close-control zero-adjusting method and system for hot rolling flat wire uncoiling area straightener |
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| CN202010243347.4A CN113458182B (en) | 2020-03-31 | 2020-03-31 | Roll gap close-control zero-adjusting method and system for hot rolling flat wire uncoiling area straightener |
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| CN113458182B true CN113458182B (en) | 2022-11-15 |
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