CN106527334B - Variable speed rolling control device and method in seamless tube production - Google Patents
Variable speed rolling control device and method in seamless tube production Download PDFInfo
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- CN106527334B CN106527334B CN201611093854.4A CN201611093854A CN106527334B CN 106527334 B CN106527334 B CN 106527334B CN 201611093854 A CN201611093854 A CN 201611093854A CN 106527334 B CN106527334 B CN 106527334B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention discloses a variable speed rolling control device and method in seamless tube production, the variable-speed rolling control device comprises a central control unit, a direct-current speed regulating device, a rolling main motor and a data detection device, the central control unit is connected with the direct current speed regulating device through a Profibus-DP bus and is used for sending a control instruction to the direct current speed regulating device; the direct current speed regulating device is connected with the rolling main motor and is used for controlling the running of the rolling main motor according to the control instruction; the data detection device is connected with the central control unit and is used for detecting the length of an unprocessed part of the pipe fitting to be processed, which is driven by the rolling main motor, and sending length data to the central control unit; and the central control unit is also used for adjusting a control instruction sent to the direct current speed regulating device according to the length data. Production of seamless tubes according to the invention variable speed rolling of (a) the control device can improve the quality of the finished pipe fitting.
Description
Technical Field
The invention relates to the technical field of pipe fitting processing, in particular to a variable speed rolling control device and a variable speed rolling control method in the production of seamless tubes.
Background
Currently, in the process of processing operations on old (man-type) piercing and rolling machines, some difficult-to-deform metals such as niobium require technical personnel to perform time parameters, and the corresponding parameters are properly adjusted in different processing stages to ensure the normal processing. However, due to hysteresis caused by manual operation, the penetration of the processed pipe is poor, the quality of the finished product is low, the perforation time is long, and the efficiency is low.
Disclosure of Invention
The invention aims to provide a variable speed rolling control device in seamless pipe production, which can improve the quality of finished pipe fittings.
In order to achieve the above object, the present invention provides the following solutions:
the variable speed rolling control device in the production of seamless tubes comprises a central control unit, a direct current speed regulating device, a rolling main motor and a data detection device, wherein,
the central control unit is connected with the direct current speed regulating device through a Profibus-DP bus and is used for sending a control instruction to the direct current speed regulating device;
the direct current speed regulating device is connected with the rolling main motor and is used for controlling the running of the rolling main motor according to the control instruction;
the data detection device is connected with the central control unit and is used for detecting the length of an unprocessed part of the pipe fitting to be processed, which is driven by the rolling main motor, and sending length data to the central control unit; and the central control unit is also used for adjusting a control instruction sent to the direct current speed regulating device according to the length data.
Optionally, the variable speed rolling control device further includes:
the monitoring device is connected with the direct current speed regulating device through a Profibus-DP bus, and the direct current speed regulating device obtains the current operation parameters of the rolling main motor and sends the current operation parameters to the monitoring device.
Optionally, the variable speed rolling control device further includes:
the hydraulic station is connected with the central control unit through a Profibus-DP bus, and the central control unit controls the start and stop of each hydraulic cylinder in the hydraulic station;
and the proximity switches are arranged corresponding to the hydraulic cylinders and connected with the central control unit, and are used for acquiring start-stop action signals of the hydraulic cylinders and sending the start-stop action signals to the central control unit.
Optionally, the variable speed rolling control device further includes:
the lubrication station is connected with the central control unit through a Profibus-DP bus, and the central control unit controls the start and stop of each lubrication device in the lubrication station;
the alarm device is arranged corresponding to each lubricating device, is connected with the central control unit and is used for generating an alarm signal and sending the alarm signal to the central control unit when the corresponding lubricating device works abnormally;
the lubrication detection device is arranged corresponding to each lubrication device, is connected with the central control unit, and is used for detecting start-stop action signals of the corresponding lubrication device and sending the start-stop action signals to the central control unit.
Optionally, the variable speed rolling control device further includes:
the mode switching button is connected with the central control unit and used for controlling the working mode of the central control unit to be semi-automatic or automatic;
and the start-stop switching button is connected with the central control unit and used for controlling the working state of the central control unit to start or stop.
Optionally, the variable speed rolling control device further includes:
the industrial personal computer is connected with the central control unit through a Profibus bus.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the variable speed rolling control device in the production of the seamless pipe, disclosed by the invention, has the advantages that the central control unit, the direct current speed regulating device and the rolling main motor are arranged, so that the central control unit controls the running of the rolling main motor through the direct current speed regulating device, and the running state of the rolling main motor is regulated according to the length of an unprocessed part detected by the data detection device, so that the rolling main motor drives a pipe fitting to be processed to accurately process at different stages, and the quality of a finished pipe fitting is improved.
The invention aims to provide a variable speed rolling control method in seamless pipe production, which can improve the quality of finished pipe fittings.
In order to achieve the above object, the present invention provides the following solutions:
a variable speed rolling control method in the production of a seamless pipe, using the variable speed rolling control device in the production of a seamless pipe, wherein the variable speed rolling control method comprises the following steps:
a first control instruction is sent to a direct current speed regulating device so as to control a rolling main motor to run at a first set rotating speed, and the rolling main motor drives a pipe fitting to be processed to bite steel at a low speed;
after the steel biting is completed and the time is delayed to the set time, a second control instruction is sent to the direct current speed regulating device so as to increase the rotating speed of the rolling main motor, and the rolling main motor drives the pipe fitting to be processed to perform variable-speed rolling according to rolling parameters;
judging whether the length of an unprocessed part of the pipe fitting to be processed detected by the detection device reaches a set threshold value or not;
if the speed reaches the preset speed, a third control instruction is sent to the direct current speed regulating device so as to reduce the rotating speed of the rolling main motor, and the rolling main motor drives the pipe fitting to be processed to perform low-speed steel throwing at a second set rotating speed; otherwise, the variable speed rolling is continued.
Optionally, the variable speed rolling control method further includes:
and after the steel throwing is finished, detecting whether the finished pipe fitting meets the preset requirement, outputting the finished pipe fitting if the finished pipe fitting meets the preset requirement, and otherwise, correcting the rolling parameters.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the variable speed rolling control method in the production of the seamless pipe controls the running of the rolling main motor through the direct current speed regulating device, and adjusts the running state of the rolling main motor according to the length of the unprocessed part detected by the data detecting device, so that the rolling main motor drives the pipe fitting to be processed to accurately process the pipe fitting in different stages, and the quality of the finished pipe fitting is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of a variable speed rolling control device in the production of seamless tubes according to the present invention;
FIG. 2 is a flow chart of a variable speed rolling control method in the production of seamless tubes according to the present invention;
fig. 3 is a flowchart of an embodiment of a variable speed rolling control method in the production of seamless tubes according to the present invention.
Symbol description:
the rolling machine comprises a central control unit-1, a direct current speed regulating device-2, a rolling main motor-3, a data detection device-4, a monitoring device-5, a hydraulic station-6, a lubrication station-7 and an industrial personal computer-8.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a variable speed rolling control device in seamless pipe production, which is characterized in that a central control unit, a direct current speed regulating device and a rolling main motor are arranged, so that the central control unit controls the running of the rolling main motor through the direct current speed regulating device, and the running state of the rolling main motor is regulated according to the length of an unprocessed part detected by a data detection device, so that the rolling main motor drives a pipe fitting to be processed to accurately process at different stages, and the quality of a finished pipe fitting is improved.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1, the variable speed rolling control device in the production of the seamless pipe is characterized by comprising a central control unit (Programmable Logic Controller, PLC) 1, a direct current speed regulating device 2, a rolling main motor 3 and a data detecting device 4.
The PLC1 is connected with the direct current speed regulating device 2 through a Profibus-DP bus and is used for sending a control instruction to the direct current speed regulating device 2; the direct current speed regulating device 2 is connected with the rolling main motor 3 and is used for controlling the running of the rolling main motor 3 according to the control instruction; the data detection device 4 is connected with the PLC1 and is used for detecting the length of an unprocessed part of the pipe fitting to be processed, which is driven by the rolling main motor 3, and sending length data to the PLC1; the PLC1 is also used for adjusting a control instruction sent to the direct current speed regulating device according to the length data.
The rolling main motor 3 adopts a double closed-loop speed regulating system with an incremental PI regulator, so that the control precision of the motor rotating speed is ensured.
Further, the variable speed rolling control device in the production of the seamless tube also comprises a monitoring device 5, the monitoring device 5 is connected with the direct current speed regulating device 2 through a Profibus-DP bus, the direct current speed regulating device 2 obtains the current operation parameters of the rolling main motor 3 and sends the current operation parameters to the monitoring device 5. Wherein the operating parameter comprises at least one of speed, current, voltage. In this embodiment, the dc speed regulation device 2 is a 6RA70.
Optionally, the variable speed rolling control device in the production of seamless tubes according to the invention further comprises a hydraulic station 6 and a plurality of proximity switches (not shown in the figures). The hydraulic station 6 is connected with the PLC1 through a Profibus-DP bus, and the PLC1 controls the start and stop of each hydraulic cylinder in the hydraulic station; and the proximity switches are arranged corresponding to the hydraulic cylinders and connected with the central control unit, and are used for acquiring start-stop action signals of the hydraulic cylinders and sending the start-stop action signals to the PLC1.
Specifically, the control of the hydraulic station and the hydraulic dispersion station comprises the start and stop of the hydraulic station and the control of hydraulic solenoid valves of all operating points, namely the action of all hydraulic cylinders, and the action result of the hydraulic cylinders can be reflected to the operating points and the operating tables of the PLC1 by the proximity switches arranged on the machinery.
Optionally, the variable speed rolling control device in the production of the seamless tube also comprises a lubrication station 7, an alarm device and a lubrication detection device. The lubrication station 7 is connected with the PLC1 through a Profibus-DP bus, and the PLC1 controls the start and stop of each lubrication device in the lubrication station; the alarm device is arranged corresponding to each lubrication device, is connected with the PLC1, and is used for generating an alarm signal and sending the alarm signal to the PLC1 when the corresponding lubrication device works abnormally; the lubrication detection device is arranged corresponding to each lubrication device, is connected with the PLC1, and is used for detecting start-stop action signals of the corresponding lubrication devices and sending the start-stop action signals to the PLC1.
Specifically, the lubrication equipment of the lubrication station comprises a lubrication station motor, a clean ring pool motor and a flat bed filter. Alarm signals of all the lubricating equipment can be fed back to the operating point and the operating platform of the PLC1 through the Profibus-DP through the digital input points.
Further, the rolling database can be called to select the working mode according to the incoming materials and the production specification. Specifically, the variable speed rolling control device in the production of the seamless tube also comprises a mode switching button and a start-stop switching button. The mode switching button is connected with the PLC1 and is used for controlling the working mode of the PLC1 to be semi-automatic or automatic; the start-stop switching button is connected with the PLC1 and used for controlling the working state of the PLC1 to be start or stop so as to ensure production safety.
Preferably, the variable speed rolling control device in the production of the seamless tube further comprises an industrial personal computer 8, wherein the industrial personal computer 8 is connected with the PLC1 through a Profibus bus so as to continuously screw and detect and control electromechanical equipment and the like in the production process.
In addition, another object of the invention is to provide a variable speed rolling control method in seamless pipe production, which controls the running of a rolling main motor through a direct current speed regulating device, and adjusts the running state of the rolling main motor according to the length of an unprocessed part detected by a data detecting device, so that the rolling main motor drives a pipe fitting to be processed to accurately process at different stages, thereby improving the quality of a finished pipe fitting.
As shown in fig. 2, the variable speed rolling control method in the production of a seamless pipe according to the present invention uses the variable speed rolling control device in the production of a seamless pipe described above. Specifically, the variable speed rolling control method in the production of the seamless tube comprises the following steps:
step 100: and sending a first control instruction to the direct current speed regulating device so as to control the rolling main motor to run at a first set rotating speed, so that the rolling main motor drives the pipe fitting to be processed to bite steel at a low speed.
Step 200: after the steel biting is completed and the time delay is up to the set time, a second control instruction is sent to the direct current speed regulating device so as to increase the rotating speed of the rolling main motor, and the rolling main motor drives the pipe fitting to be processed to conduct variable speed rolling according to rolling parameters.
Step 300: judging whether the length of the unprocessed part of the pipe fitting to be processed detected by the detection device reaches a set threshold value. In this embodiment, the set threshold is 500mm.
Step 400: if the speed reaches the preset speed, a third control instruction is sent to the direct current speed regulating device so as to reduce the rotating speed of the rolling main motor, and the rolling main motor drives the pipe fitting to be processed to perform low-speed steel throwing at a second set rotating speed; otherwise, step 200 is performed to continue the variable speed rolling.
Preferably, the variable speed rolling control method in the production of the seamless tube further comprises the following steps:
and after the steel throwing is finished, detecting whether the finished pipe fitting meets the preset requirement, outputting the finished pipe fitting if the finished pipe fitting meets the preset requirement, and otherwise, correcting the rolling parameters.
The following description is presented in terms of one embodiment:
as shown in fig. 3, the start button is pressed by first turning on the power; starting a hydraulic station and a lubrication station; selecting a working mode (in the embodiment, the working mode is a semi-automatic mode), and setting the size and the production specification of the incoming material; then, the rolling parameters are called from the database, and a reference basis is provided for the rolling operation; after the feeder is started, the central control unit sends a first control instruction to the direct current speed regulating device, so that the rolling main motor drives a pipe fitting to be processed to bite steel at a low speed; after the steel biting is completed, delaying for t seconds (can be set in a central control unit in advance according to the need); the central control unit sends a second control instruction to the direct current speed regulating device, so that the rolling main motor drives the pipe fitting to be processed to carry out variable-speed rolling according to rolling parameters; judging whether the length of an unprocessed part of the pipe fitting to be processed detected by the detection device reaches 500mm, if so, sending a third control instruction to the direct current speed regulating device by the central control unit, so that the rolling main motor drives the pipe fitting to be processed to perform low-speed steel throwing, otherwise, continuing variable-speed rolling; after the steel throwing is finished, detecting whether the finished pipe fitting meets the preset requirement, if so, automatically outputting the finished pipe fitting, otherwise, correcting the rolling parameters, and repeating the steps.
According to the invention, the rolling main motor runs at a low speed when rolling starts, and after a certain time delay, the speed is increased step by step, and then the speed is reduced step by step, and when the speed reduction when rolling is about to be completed is detected before rolling is finished, the rolling main motor throws out at a low speed, so that the quality of a pipe can be improved and the rolling rate can be improved by controlling.
In addition, the high-speed rolling can shorten the perforation time, so that the heat load of the plug is reduced, the durability of the plug is improved, and the influence on production caused by the short service life of the plug due to long perforation time is avoided.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (8)
1. A variable speed rolling control device in seamless tube production is characterized by comprising a central control unit, a direct current speed regulating device, a rolling main motor and a data detection device, wherein,
the central control unit is connected with the direct current speed regulating device through a Profibus-DP bus and is used for sending a control instruction to the direct current speed regulating device;
the direct current speed regulating device is connected with the rolling main motor and is used for controlling the running of the rolling main motor according to the control instruction;
the data detection device is connected with the central control unit and is used for detecting the length of an unprocessed part of the pipe fitting to be processed, which is driven by the rolling main motor, and sending length data to the central control unit; the central control unit is also used for adjusting a control instruction sent to the direct current speed regulating device according to the length data;
the rolling main motor adopts a double closed-loop speed regulation system with an incremental PI regulator.
2. The variable speed rolling control device in the production of seamless tubes according to claim 1, further comprising:
the monitoring device is connected with the direct current speed regulating device through a Profibus-DP bus, and the direct current speed regulating device obtains the current operation parameters of the rolling main motor and sends the current operation parameters to the monitoring device.
3. The variable speed rolling control device in the production of seamless tubes according to claim 1, further comprising:
the hydraulic station is connected with the central control unit through a Profibus-DP bus, and the central control unit controls the start and stop of each hydraulic cylinder in the hydraulic station;
and the proximity switches are arranged corresponding to the hydraulic cylinders and connected with the central control unit, and are used for acquiring start-stop action signals of the hydraulic cylinders and sending the start-stop action signals to the central control unit.
4. The variable speed rolling control device in the production of seamless tubes according to claim 1, further comprising:
the lubrication station is connected with the central control unit through a Profibus-DP bus, and the central control unit controls the start and stop of each lubrication device in the lubrication station;
the alarm device is arranged corresponding to each lubricating device, is connected with the central control unit and is used for generating an alarm signal and sending the alarm signal to the central control unit when the corresponding lubricating device works abnormally;
the lubrication detection device is arranged corresponding to each lubrication device, is connected with the central control unit, and is used for detecting start-stop action signals of the corresponding lubrication device and sending the start-stop action signals to the central control unit.
5. The variable speed rolling control device in the production of seamless tubes according to any one of claims 1 to 4, further comprising:
the mode switching button is connected with the central control unit and used for controlling the working mode of the central control unit to be semi-automatic or automatic;
and the start-stop switching button is connected with the central control unit and used for controlling the working state of the central control unit to start or stop.
6. The variable speed rolling control device in the production of seamless tubes according to any one of claims 1 to 4, further comprising:
the industrial personal computer is connected with the central control unit through a Profibus bus.
7. A variable speed rolling control method in the production of a seamless pipe, characterized by using the variable speed rolling control device in the production of a seamless pipe according to any one of claims 1 to 6, wherein the variable speed rolling control method comprises:
a first control instruction is sent to a direct current speed regulating device so as to control a rolling main motor to run at a first set rotating speed, and the rolling main motor drives a pipe fitting to be processed to bite steel at a low speed;
after the steel biting is completed and the time is delayed to the set time, a second control instruction is sent to the direct current speed regulating device so as to increase the rotating speed of the rolling main motor, and the rolling main motor drives the pipe fitting to be processed to perform variable-speed rolling according to rolling parameters;
judging whether the length of an unprocessed part of the pipe fitting to be processed detected by the detection device reaches a set threshold value or not;
if the speed reaches the preset speed, a third control instruction is sent to the direct current speed regulating device so as to reduce the rotating speed of the rolling main motor, and the rolling main motor drives the pipe fitting to be processed to perform low-speed steel throwing at a second set rotating speed; otherwise, the variable speed rolling is continued.
8. The variable speed rolling control method in the production of seamless tubes according to claim 7, further comprising:
and after the steel throwing is finished, detecting whether the finished pipe fitting meets the preset requirement, outputting the finished pipe fitting if the finished pipe fitting meets the preset requirement, and otherwise, correcting the rolling parameters.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611093854.4A CN106527334B (en) | 2016-12-02 | 2016-12-02 | Variable speed rolling control device and method in seamless tube production |
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| CN201611093854.4A CN106527334B (en) | 2016-12-02 | 2016-12-02 | Variable speed rolling control device and method in seamless tube production |
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| CN106527334B true CN106527334B (en) | 2023-08-29 |
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