CN111438192B - Method for replacing working roll - Google Patents
Method for replacing working roll Download PDFInfo
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- CN111438192B CN111438192B CN202010357643.7A CN202010357643A CN111438192B CN 111438192 B CN111438192 B CN 111438192B CN 202010357643 A CN202010357643 A CN 202010357643A CN 111438192 B CN111438192 B CN 111438192B
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- roll
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- working roll
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- work roll
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
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Abstract
The invention belongs to the technical field of steel rolling, and particularly relates to a method for replacing a working roll. The replacement method comprises the following steps: positioning an old work roll, the positioning the old work roll comprising: driving the old working roll to start from a static state to a fixed rotating speed by using a motor; starting a positioning switch fixed on a preset position, wherein an induction element is arranged on the old working roll, and the started positioning switch can detect the induction element; when the positioning switch detects the induction element, the induction element is in the preset position; after the positioning switch detects the induction element, the rotating speed of the motor is controlled, the motor drives the old working roll to rotate for 360 degrees, and the induction element stops at the preset position to position the old working roll. The invention can realize the accuracy and the stability of the automatic positioning of the working roll and achieve the aims of improving the operation rate and the productivity of the rolling mill.
Description
Technical Field
The invention belongs to the technical field of steel rolling, and particularly relates to a method for replacing a working roll.
Background
Hot rolling is a necessary process in a strip steel production chain of a modern steel mill, and in the hot rolling production process, the roll change of a working roll of a finish rolling mill is usually carried out every time a batch of slabs is rolled, so the change of the working roll is a key link in the production process of a hot continuous rolling line.
With the release of hot rolling capacity and the improvement of rolling rhythm, the average time of changing the working rolls in each finish rolling (namely the time from throwing steel by an F1 rolling mill to biting steel by an F1 rolling mill) is reduced to be within 10 minutes, and higher requirements are put forward for the automatic positioning of the working rolls in the working roll process. If the automatic positioning position of the working roll is inaccurate or the position is lost in the roll changing process, the automatic roll changing control program is terminated, and an operator switches to a manual mode for roll changing, so that the time is long, the production efficiency is influenced, and equipment accidents are easily caused. Therefore, how to realize the accuracy and stability of the automatic positioning of the working roll is the key for improving the operating rate and the productivity of the rolling mill.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a working roll replacing method, which is used for realizing the accuracy and the stability of automatic positioning of a working roll and improving the operating rate and the productivity of a rolling mill.
The technical scheme of the invention is as follows:
a work roll replacement method, the replacement method comprising:
positioning an old work roll, the positioning the old work roll comprising:
driving the old working roll to start from a static state to a fixed rotating speed by using a motor;
starting a positioning switch fixed on a preset position, wherein an induction element is arranged on the old working roll, and the started positioning switch can detect the induction element;
when the positioning switch detects the induction element, the induction element is in the preset position;
after the positioning switch detects the induction element, the rotating speed of the motor is controlled, the motor drives the old working roll to rotate for 360 degrees, and the induction element stops at the preset position to position the old working roll.
Further, the rotational speed of control motor, after the motor drove the working roll and rotates at least a week, induction element is in preset position stops to the location the working roll specifically includes:
when the positioning switch detects the induction element, triggering the positioning switch to send a first trigger signal to a programmable logic controller;
the programmable logic controller which receives the first trigger signal performs closed-loop adjustment on the basis of a preset rotation angle of an old working roller and a real-time angle generated by rotation of the old working roller, and sets the rotation speed of the old working roller;
and when the old working roll provided with the sensing element rotates to the preset position again, the old working roll stops rotating.
Further, when the old working roll to which the induction element is mounted rotates to the preset position again and the positioning switch detects the induction element, the positioning switch is triggered to send a second trigger signal to the programmable logic controller;
and the programmable logic controller receiving the second trigger signal controls the positioning switch to be closed.
Optionally, the real-time angle of rotation of the old work roll is determined using a code generated by a rotary encoder mounted on a motor as the old work roll rotates.
Preferably, the fixed rotation speed is 7 rpm, and the maximum rotation speed of the motor is controlled to be 20 rpm after the positioning switch detects the induction element.
Further, still include behind the location work roll:
removing the old work rolls from the mill;
a new work roll is assembled to the mill.
Further, the removing the old work roll from the rolling mill specifically includes:
providing a roll changing trolley and a moving platform, wherein the moving direction of the roll changing trolley is parallel to the axial direction of the old working roll, and the moving direction of the moving platform is vertical to the moving direction of the roll changing trolley;
operating the roll changing trolley to move the roll changing trolley to a first position, wherein the first position is a position for receiving an old working roll;
operating the old working roll to transfer the old working roll to the roll changing trolley;
operating the roll changing trolley to move the roll changing trolley to a second position, wherein the second position is a new and old working roll changing position;
operating an old working roll, and transferring the old working roll from the roll changing trolley to the moving platform;
and operating the mobile platform to transfer the old working roll to other positions.
Further, the assembling of the new work roll to the rolling mill specifically includes:
providing a new work roll, the new work roll being located on the mobile platform;
operating the mobile platform to transfer the new work roll to the second position;
operating the new working roll to transfer the new working roll from the moving platform to the roll changing trolley;
operating the roll changing trolley to move the roll changing trolley to a first position;
operating the new work roll and installing the new work roll on the rolling mill.
Further, the new working roll is placed on the moving platform, and specifically includes:
and putting new working rolls on the moving platform in advance, wherein the new working rolls and the old working rolls have the same postures, and the distance between the new working rolls is the same as that between the working rolls on the rolling mill.
Further, the new work rolls remain unchanged in attitude during the transfer of the new work rolls to the second position and during the installation of the new work rolls onto the rolling mill.
The invention has the beneficial effects that:
the invention provides a working roll replacing method, which utilizes a positioning switch fixed on a preset position to sense an induction element on an old working roll so as to control the rotating speed of a motor, so that the working roll driven by the motor is stopped at the preset position, the accuracy and the stability of automatic positioning of the working roll are realized, and the aims of improving the operating rate and the productivity of a rolling mill are fulfilled.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a work roll changing method according to an embodiment of the present invention;
FIG. 2 is a schematic view of the assembly of components required to position the old work roll.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a method for replacing a working roll, fig. 1 is a schematic flow chart of the method for replacing the working roll in the embodiment of the invention, and with reference to fig. 1, the method for replacing the working roll comprises the following steps:
s1: positioning the old work roll;
s2: removing the old work rolls from the mill;
s3: a new work roll is assembled to the mill.
S1 of the embodiment of the present invention specifically includes:
before positioning the old working roll, the old working roll needs to be shifted to a central position, and the working roll at the central position is in a non-working state;
after the working roll is shifted to the central point, need fix a position the working roll, it is very important to fix a position the working roll process, and the direct relation is demolishd of follow-up old working roll and the assembly of new working roll, and figure 2 is the required component assembly sketch map of the old working roll of location, combines figure 2, fixes a position old working roll and specifically includes:
s11: the old work rolls 2 are driven by the motor 1 to start from a standstill to a fixed rotational speed.
The fixed rotation speed in this step should be low, and the fixed rotation speed is preferably 7 rpm, so that the sensing element can be stably and reliably detected after the subsequent positioning switch is started, and if the speed is too high, the positioning switch cannot detect the sensing element.
S12: and starting the positioning switch 3 fixed on a preset position, arranging the sensing element 4 on the old working roll 2, and detecting the sensing element 4 by the started positioning switch 3.
In the step, the positioning switch 3 can be arranged at any set position of the rolling mill, a power supply is externally connected, a switch is arranged between the power supply and the positioning switch 3, and the switch can receive the instruction of a programmable logic controller to switch on and off the positioning switch 3.
In the case where the positioning switch does not detect the inductive element 4, the positioning switch 3 outputs a signal of 0 to the programmable logic controller.
S13: when the positioning switch 3 detects the sensing element 4, the sensing element 4 is in a preset position, and when the positioning switch 3 detects the sensing element 4, a signal output to the programmable logic controller by the positioning switch 4 is 1, namely a first trigger signal;
s14: after the positioning switch 3 detects the induction element 4, the rotating speed of the motor 1 is controlled, and after the motor 1 drives the old working roll 2 to rotate 360 degrees, the induction element 4 stops at a preset position so as to position the old working roll 2.
In the step, the programmable logic controller which receives the first trigger signal carries out closed-loop adjustment and sets the rotating speed of the old working roll 2 based on the preset rotating angle of the old working roll 2 and the real-time angle generated by the rotation of the old working roll 2;
when the old working roll 2 to which the sensing element 4 is to be mounted rotates to the predetermined position again, the old working roll 2 stops rotating, and the positioning of the old working roll 2 is realized.
In this step, the real-time angle of rotation of the old work roll 2 can be determined using the code generated by the rotary encoder 5 mounted on the motor 1 as the old work roll 2 rotates.
In the step, after the positioning switch 3 detects the induction element 4, the maximum rotating speed of the motor 1 is controlled to be 20 revolutions per minute, if the speed of the motor 1 is too high, instability exists, and the positioning time can be shortened on the premise of ensuring the reliability by limiting 20 revolutions per minute; as the rotation of the old work roll 2 gets closer to the predetermined position, the speed of the motor 1 gets lower and lower, and finally stops at the target position.
In addition, when the old working roll 2 to which the sensing element 4 is mounted rotates to the preset position again, and the positioning switch 3 detects the sensing element 4, the sensing element 4 is triggered to send a second trigger signal to the programmable logic controller, and the programmable logic controller receiving the second trigger signal can control the positioning switch 3 to be turned off, so that the purpose of automatic control is fulfilled.
The working roll replacing method provided by the embodiment of the invention utilizes the positioning switch fixed on the preset position to sense the sensing element on the old working roll so as to control the rotating speed of the motor, so that the working roll driven by the motor is stopped at the preset position, the accuracy and the stability of automatic positioning of the working roll are realized (the positioning accuracy can reach +/-0.3 degrees), and the aims of improving the operation rate of a rolling mill and improving the productivity are fulfilled.
After the positioning of the old working roll is completed, the accessory equipment, such as cooling water pipes and the like, on the old working roll can be removed, and after the positioning is completed, the next operation can be carried out.
In the embodiment of the invention, the removing of the old working roll from the rolling mill specifically comprises the following steps:
s21: providing a roll changing trolley and a moving platform, wherein the moving direction of the roll changing trolley is parallel to the axial direction of the old working roll, and the moving direction of the moving platform is vertical to that of the roll changing trolley;
in the step, the roll changing trolley can run on the track and can receive the instruction sent by the programmable logic controller to stop and run in real time. And the mobile platform can also receive the instruction sent by the programmable logic controller, and stop and operate in real time.
S22: the roll change carriage is operated to move the roll change carriage to a first position where it receives the old work roll, which first position can be confirmed by the position sensor.
S23: operating the old working roll to transfer the old working roll to the roll changing trolley;
s24: operating the roll changing trolley to move the roll changing trolley to a second position, wherein the second position is a new and old working roll exchanging position, and the second position can also be confirmed by a position sensor;
s25: operating the old working roll to transfer the old working roll from the roll changing trolley to the moving platform;
s26: the mobile platform is operated to transfer the old work rolls to other locations.
In the embodiment of the invention, the assembling of the new working roll to the rolling mill specifically comprises:
s31: providing a new working roller, wherein the new working roller is positioned on the mobile platform and can be placed on the mobile platform through pre-operation, and the new working roller and the old working roller have the same posture;
s32: operating the mobile platform to transfer the new working roll to the second position;
s33: operating a new working roll to transfer the new working roll from the mobile platform to the roll changing trolley, wherein in the transfer process, the posture of the new working roll is kept unchanged, namely the new working roll and the old working roll have the same posture;
s34: operating the roll changing trolley to move the roll changing trolley to a first position;
s35: and operating a new working roll, and installing the new working roll on the rolling mill, wherein in the process, the posture of the new working roll is kept unchanged, namely the new working roll and the old working roll have the same posture, so that when the new working roll is assembled on the rolling mill, the new working roll does not need to be positioned again, the assembly of the new working roll is convenient, and the assembly efficiency is improved.
The following embodiments are provided for the purpose of illustrating the present invention and are not to be construed as limiting the present invention in any way, and it will be apparent to those skilled in the art that the technical features of the present invention can be modified or changed in some ways without departing from the scope of the present invention.
Claims (7)
1. A work roll replacement method, characterized in that the replacement method comprises:
shifting the old working roll to a central position, positioning the old working roll, wherein the positioning of the old working roll comprises the following steps:
driving the old working roll to start from a static state to a fixed rotating speed by using a motor;
starting a positioning switch fixed on a preset position, wherein an induction element is arranged on the old working roll, and the started positioning switch can detect the induction element;
when the positioning switch detects the induction element, the induction element is in the preset position, and the positioning switch is triggered to send a first trigger signal to the programmable logic controller;
the programmable logic controller which receives the first trigger signal performs closed-loop adjustment on the basis of a preset rotation angle of an old working roller and a real-time angle generated by rotation of the old working roller, and sets the rotation speed of the old working roller;
when the old working roll provided with the induction element rotates to the preset position again, the old working roll stops rotating, and the positioning switch triggers the positioning switch to send a second trigger signal to the programmable logic controller when detecting the induction element;
the programmable logic controller receives the second trigger signal and controls the positioning switch to be closed;
removing the old work rolls from the mill;
a new work roll is assembled to the mill.
2. The work roll changing method according to claim 1, wherein a real-time angle of rotation of the old work roll is determined using a code generated by a rotary encoder mounted on a motor as the old work roll rotates.
3. The work roll changing method of claim 1 wherein the fixed speed is 7 rpm and the maximum speed of the motor is controlled to be 20 rpm after the position switch detects the sensing element.
4. The work roll changing method according to claim 1, wherein said removing the old work roll from the rolling mill comprises:
providing a roll changing trolley and a moving platform, wherein the moving direction of the roll changing trolley is parallel to the axial direction of the old working roll, and the moving direction of the moving platform is vertical to the moving direction of the roll changing trolley;
operating the roll changing trolley to move the roll changing trolley to a first position, wherein the first position is a position for receiving an old working roll;
operating the old working roll to transfer the old working roll to the roll changing trolley;
operating the roll changing trolley to move the roll changing trolley to a second position, wherein the second position is a new and old working roll changing position;
operating an old working roll, and transferring the old working roll from the roll changing trolley to the moving platform;
and operating the mobile platform to transfer the old working roll to other positions.
5. The work roll changing method according to claim 4, wherein said fitting a new work roll to a rolling mill comprises:
providing a new work roll, the new work roll being located on the mobile platform;
operating the mobile platform to transfer the new work roll to the second position;
operating the new working roll to transfer the new working roll from the moving platform to the roll changing trolley;
operating the roll changing trolley to move the roll changing trolley to a first position;
operating the new work roll and installing the new work roll on the rolling mill.
6. The method for replacing a work roll according to claim 5, wherein the step of placing the new work roll on the movable platform comprises:
and putting new working rolls on the moving platform in advance, wherein the new working rolls and the old working rolls have the same postures, and the distance between the new working rolls is the same as that between the working rolls on the rolling mill.
7. The work roll changing method of claim 6 wherein the attitude of the new work roll remains unchanged during the transfer of the new work roll to the second position and during installation of the new work roll onto the rolling mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010357643.7A CN111438192B (en) | 2020-04-29 | 2020-04-29 | Method for replacing working roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010357643.7A CN111438192B (en) | 2020-04-29 | 2020-04-29 | Method for replacing working roll |
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| Publication Number | Publication Date |
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| CN111438192A CN111438192A (en) | 2020-07-24 |
| CN111438192B true CN111438192B (en) | 2022-03-18 |
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| CN202010357643.7A Active CN111438192B (en) | 2020-04-29 | 2020-04-29 | Method for replacing working roll |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633001A (en) * | 2008-07-24 | 2010-01-27 | 上海重型机器厂有限公司 | Roll-changing machine and roll-changing method therefor |
| CN101670369A (en) * | 2009-09-24 | 2010-03-17 | 唐山国丰钢铁有限公司 | Full-automatic fast roll changing method for hot rolling mill |
| CN102601120A (en) * | 2012-03-23 | 2012-07-25 | 高宇笙 | Automatic roll changing and adjusting device of rolling mill and operation method of automatic roll changing and adjusting device |
| CN203227669U (en) * | 2013-04-08 | 2013-10-09 | 中国重型机械研究院股份公司 | Quick roll change device for working roll of finishing machine |
| CN104525574A (en) * | 2014-12-28 | 2015-04-22 | 鞍钢冷轧钢板（莆田）有限公司 | Device for fast replacing tension roller between rolling mill frames and roller replacing method |
| CN107363099A (en) * | 2016-05-12 | 2017-11-21 | 鞍钢股份有限公司 | A kind of cold-rolling mill spindle alignment control method |
-
2020
- 2020-04-29 CN CN202010357643.7A patent/CN111438192B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633001A (en) * | 2008-07-24 | 2010-01-27 | 上海重型机器厂有限公司 | Roll-changing machine and roll-changing method therefor |
| CN101670369A (en) * | 2009-09-24 | 2010-03-17 | 唐山国丰钢铁有限公司 | Full-automatic fast roll changing method for hot rolling mill |
| CN102601120A (en) * | 2012-03-23 | 2012-07-25 | 高宇笙 | Automatic roll changing and adjusting device of rolling mill and operation method of automatic roll changing and adjusting device |
| CN203227669U (en) * | 2013-04-08 | 2013-10-09 | 中国重型机械研究院股份公司 | Quick roll change device for working roll of finishing machine |
| CN104525574A (en) * | 2014-12-28 | 2015-04-22 | 鞍钢冷轧钢板（莆田）有限公司 | Device for fast replacing tension roller between rolling mill frames and roller replacing method |
| CN107363099A (en) * | 2016-05-12 | 2017-11-21 | 鞍钢股份有限公司 | A kind of cold-rolling mill spindle alignment control method |
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| Publication number | Publication date |
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| CN111438192A (en) | 2020-07-24 |
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