CN107876563A - A kind of system of the continuous casting and rolling based on Frequency Induction Heating - Google Patents
A kind of system of the continuous casting and rolling based on Frequency Induction Heating Download PDFInfo
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- CN107876563A CN107876563A CN201711049711.8A CN201711049711A CN107876563A CN 107876563 A CN107876563 A CN 107876563A CN 201711049711 A CN201711049711 A CN 201711049711A CN 107876563 A CN107876563 A CN 107876563A
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- Prior art keywords
- induction heating
- frequency induction
- intermediate frequency
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- steel billet
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
-
- 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Induction Heating (AREA)
Abstract
The present invention discloses a kind of system of the continuous casting and rolling based on Frequency Induction Heating.Described system comprises at least：Two groups of intermediate frequency induction heating devices, every group of intermediate frequency induction heating device include multiple sensing heaters；Billet feeding line, it is made up of multiple tactic live-roller gears, each live-roller gear is driven by corresponding controlled variable-frequency motor；The sensing heater of one group or two groups intermediate frequency induction heating device is provided between live-roller gear；Steel billet detection sensor, intermediate frequency induction heating device arrival end and the port of export being arranged on billet feeding line；PLC control devices, receive the detection signal of sensor and outside other signals, with output control signal to the driving live-roller gear operating of controlled variable-frequency motor and output control signal to any group or two groups of intermediate frequency induction heating devices to drive sensing heater to heat online steel billet；PLC control devices realize that the multi-frequency of intermediate frequency induction heating device exports by changing the size of resonant inductance.The system can substantially reduce power consumption, increase economic efficiency.
Description
Technical field
The present invention relates to the heating of continuous casting and rolling steel billet, belongs to the technical field of steel rolling, specifically a kind of to be based on intermediate frequency
The system of the continuous casting and rolling of sensing heating.
Background technology
Steel rolling mill is substantially all using hot sending (continuous casting and rolling) in order to save cost at present.But the steel billet that conticaster comes out
Temperature is unstable, and steel billet temperature is less than less than 800 DEG C sometimes.This makes steel billet in the operation of rolling, often occur steel billet head cracking,
Milling train overload etc., this greatly increases rolling mill fault rate.Therefore steel billet come out from conticaster, into milling train before carry out heating temperature raising
It is necessary.
The content of the invention
To overcome drawbacks described above, a kind of floor space of present invention offer is small, simple to operate, easy to maintenance to be based on Medium frequency induction
The system of the continuous casting and rolling of heating.
To reach above-mentioned purpose, the system of the continuous casting and rolling of the invention based on Frequency Induction Heating, comprise at least：
Two groups of intermediate frequency induction heating devices, every group of intermediate frequency induction heating device include multiple sensing heaters；
Blank conveying line, it is made up of multiple tactic live-roller gears, each live-roller gear is by corresponding controlled frequency conversion
Motor drives；
The sensing heater of one group or two groups intermediate frequency induction heating device is provided between live-roller gear；
Steel billet detection sensor, intermediate frequency induction heating device arrival end and the port of export being arranged on billet feeding line；
PLC control devices, the detection signal of sensor and outside other signals are received, controlled change is given with output control signal
The driving live-roller gear operating of frequency motor and output control signal are felt to any group or two groups of intermediate frequency induction heating devices with driving
Heater is answered to heat online steel billet；
Preferably, every group of intermediate frequency induction heating device is all by a set of medium frequency induction power supply, a set of capacitor bank and three senses
Heater is answered to form.
Connected again with a set of capacitor bank after the coil series connection of three described sensing heaters, it is finally electric with Medium frequency induction
Source, which is connected, is used as the load of medium frequency induction power supply.
Preferably, described billet feeding line is made up of live-roller gear, each live-roller gear is equipped with a frequency conversion
Buncher, PLC realize the control billet feeding line speed of service by controlling the rotating speed of frequency control motor.
Described steel billet is run on live-roller gear, without friction between steel billet and sensing heater, improves sensing heater
Service life.
Preferably, three described sensing heaters, each sensing heater shorting switch in parallel, pass through PLC
The disconnected open and close of shorting switch is controlled, changes the inductance size of medium frequency induction power supply, the resonant frequency of medium frequency induction power supply
Change therewith, realize the multi-frequency output of medium frequency induction power supply.
Preferably, described PLC control devices use Siemens S7-300 PLC, PLC to detect system needs various
Signal is detected, and is converted in coherent signal input PLC, and PLC is according to design requirement, and timely output order is to each
Executing agency, the running status of intermediate frequency induction heating system is adjusted and shown, it is operated in optimum state all the time.
Preferably, described billet feeding line is made up of 7 live-roller gears；Wherein, first group of Frequency Induction Heating dress
Three sensing heaters put are arranged between the adjacent drive roller-way of billet feeding line inlet side；Second group of Medium frequency induction adds
Three sensing heaters of thermal are arranged between the adjacent drive roller-way of billet feeding line outlet side；
Preferably, also include three travel switches and three infrared thermometers, wherein the first travel switch and first red
Outside line temperature measurer is arranged on the entry position of first sensing heater of first group of intermediate frequency induction heating device, and the second stroke is opened
Close and the second infrared thermometer is arranged on the outlet port of first group of sensing heater of intermediate frequency induction heating device the 3rd, the 3rd
Travel switch and the 3rd infrared thermometer are arranged on the outlet position of second group of sensing heater of intermediate frequency induction heating device the 3rd
Put；
Wherein, when steel billet touches travel switch, travel switch action, PLC control devices detect travel switch
Action signal；Infrared thermometer detects the temperature signal of steel billet, and the temperature signal of steel billet is sent into PLC control devices；
The steel billet temperature signal and travel switch signal that described PLC control devices obtain according to monitoring, to control steel billet
The power output of the speed of service and sensing heater, outlet temperature of the steel billet when rolling latter end sensing heater away from is set to reach steel billet
Rolling temperature.
Preferably, described PLC control devices are controlled in the steps below：
If detect that the head end of steel billet enters first sense of first group of intermediate frequency induction heating device in the first travel switch
When answering heater, if the temperature of the first infrared thermometer on-line real-time measuremen steel billet when between 750~930 DEG C, first group
The induction heating power output rated power of intermediate frequency induction heating device；If the first infrared thermometer detects the temperature of steel billet in real time
When degree is less than 750 DEG C or more than 930 DEG C, the induction heating power no-load running of first group of intermediate frequency induction heating device；
If the second described travel switch detects that the tail end of steel billet leaves 1# sensing heaters, first group of Medium frequency induction
The induction heating power no-load running of heater；
If the second described travel switch enters the of second group of intermediate frequency induction heating device in the head end for detecting steel billet
One sensing heater, the temperature of the second infrared radiation thermometer on-line real-time measuremen steel billet is when between 750~930 DEG C, second group
The induction heating power output rated power of intermediate frequency induction heating device；The temperature that second infrared radiation thermometer detects steel billet in real time is small
During in 750 DEG C or more than 930 DEG C, the induction heating power no-load running of second group of intermediate frequency induction heating device.
If described third trip switch detects that the tail end of steel billet leaves, second group of intermediate frequency induction heating device sensing
Heating power supply no-load running.
Preferably, described PLC control devices also include being controlled in the steps below：
If one of which intermediate frequency induction heating device breaks down, another set intermediate frequency induction heating device general rule crosses PLC
Power is transferred to maximum by control device automatically, and outputs a control signal to billet feeding line to reduce the steel billet speed of travel.
Preferably, described sensing heater uses modularized design, it is easy to maintenance and the replacing of consumable accessory.
The advantage of the invention is that：
1st, using induction heater, have：Energy utilization rate is high, and firing rate is fast；Billet oxidization rate is low, improves pipe table
Face quality；Environmental protection, zero-emission；Steel billet temperature precise control；
2nd, induction heater investment it is small, floor space is small, it is simple to operate, easy to maintenance, it is easy realization automatically control, with open with
Stop.
3rd, two groups of intermediate frequency induction heating devices can backup each other, to prevent any group of failure from influenceing normal production,
Also can two groups use simultaneously, to reach the purpose quickly heated, to improve production efficiency.
4th, the operating rate and working condition of steel billet detection sensor, in real time control live-roller is passed through；Pass through infrared survey
Wen Yi, the real-time temperature for monitoring steel billet, and output control signal are to controller, to control the heating of induction heating apparatus fast in real time
Degree, can substantially reduce power consumption, increase economic efficiency.
Brief description of the drawings
Fig. 1 is the structured flowchart of Frequency Induction Heating system embodiment of the present invention
Fig. 2 is the control block diagram of the Frequency Induction Heating system embodiment of the present invention
Fig. 3 is the main circuit structure figure of series resonance induction heating power
Fig. 4 is the control block diagram of series resonance induction heating power
Embodiment
With reference to Figure of description, the present invention will be further described.
Fig. 1 is the structured flowchart of Frequency Induction Heating system of the present invention, as shown in figure 1, it is by two groups of Frequency Induction Heatings
Device, 7 live-roller gears, 7 variable-frequency motors, PLC control devices and part detection device composition.Every group of Frequency Induction Heating dress
Put and be all made up of a set of medium frequency induction power supply, a set of water-cooling circulating system, a set of capacitor bank and three sensing heaters, two groups
Intermediate frequency induction heating device is separate, standby each other.Medium frequency induction power supply is used to produce intermediate frequency power supply, is Frequency Induction Heating
Device improves energy, and water-cooling circulating system is used to cool down medium frequency induction power supply, capacitor bank and three sensing heaters.Capacitor
Group is to form the main element of intermediate frequency resonant tank, and it plays key effect, intermediate frequency together with induction coil in intermediate frequency loop
The working frequency of heating furnace is mainly determined by the inductance of condenser capacity and coil.The main devices of sensing heater are the lines of induction
Intermediate frequency electromagnetic can be converted into heat energy by circle, induction coil, and it designs the efficiency of heating surface that the quality of processing directly affects complete equipment,
Sensing heater uses modularized design, is easy to rapid interchangeable.
7 variable-frequency motors connect 7 live-roller gears respectively, and PLC system controls the operation of 7 variable-frequency motors.
Detection device mainly includes three travel switches and three infrared thermometers, one of travel switch and one
Infrared thermometer is arranged on the entry position of first 1# sensing heater；Another travel switch and an infrared thermometry
Instrument is arranged on the outlet port of the 3rd 1# sensing heater；Last travel switch and an infrared thermometer are arranged on
The outlet port of 3rd 2# sensing heater.Travel switch is used for the position for detecting steel billet, and infrared thermometer is used to detect
The temperature of steel billet.
Fig. 2 is the control block diagram of the Frequency Induction Heating system of the present invention, as shown in Fig. 2 Frequency Induction Heating system is adopted
With Siemens S7-300 PLC, PLC is the control centre of a whole set of heating system, and the various signals that it detects system needs are defeated
Enter in PLC, PLC is according to design requirement, timely output order to each executing agency, operations of the PLC to online equipment
State is adjusted and shown, it is operated in optimum state all the time.Frequency Induction Heating system is controlled by PLC, has temperature
Constant control, temperature monitoring are spent, the function of stable and reliable operation, automatic control mode and MANUAL CONTROL mode, heating can be achieved
System has the protection such as excessively stream, overvoltage, water temperature height, the low, alarm of mechanical feed failure of hydraulic pressure.
Fig. 3 is the main circuit structure figure of series resonance induction heating power, as shown in figure 3, series resonance sensing heating is electric
The main circuit structure in source is made up of rectification link, filtering link, inversion link and load, and rectification circuit is induction heating power
Important component, its effect is that industrial frequency AC electric energy is converted into direct current energy.The rectification circuit uses two 6 arteries and veins rectification structures
Into a 12 arteries and veins rectification circuits, one of them 6 arteries and veins rectification circuit is made up of diode D1, D2, D3, D4, D5 and D6, and another 6
Arteries and veins rectification circuit is made up of diode D7, D8, D9, D10, D11 and D12, switchs K and current-limiting resistance R3 parallel connections, DC support electricity
During capacity charge, switch K is opened, and current-limiting resistance R3 prevents electric capacity from charging, and when capacitance voltage is charged to a certain appropriate value, switch K is closed
Close, current-limiting resistance R3 is shorted.L is filter inductance, and C3 is filter capacitor, DC support electric capacity C1 and C2 series connection, resistance R1 with
C1 is in parallel, and resistance R2 is in parallel with C2.The basic function of inverter section be by the regular switching of power semiconductor switch,
Load-side obtains the exchange electricity output of certain frequency, and its frequency is determined by the switch motion frequency of inverter circuit.Inversion link
Inversion device uses IGBT module, and single-phase full bridge inverter circuit is formed by tetra- IGBT modules of T1, T2, T3 and T4.Sensing heating
Load is mainly made up of metal works of the induction coil with sensing heating in itself, and power factor is very low.In order to improve power factor,
Frequently with connection capacitor method with compensating power.According to the connecting mode of compensating electric capacity and induction coil (together with load) not
Together, inverter circuit can be divided into antiresonant circuit, series resonant circuit.The load of this circuit is harmonious using resonant inductance
The electric capacity that shakes LC series resonant circuits in series.Resonant inductance is three sensing heater strings for L1, L2 and L3 by inductance
Connection composition, inductance is L1 parallel connection shorting switch K1, and inductance is L2 parallel connection shorting switch K2, and inductance is L3 parallel connection shorting switch
K3.PLC controls shorting switch K1, K2 and K3's turns on and off to change the size of resonant inductance, resonance heating power supply it is humorous
Vibration frequency changes with the change of resonant inductance, and resonance heating power supply is realized by changing the resonant inductance of resonance heating power supply
Multi-frequency output.
Fig. 4 is the control block diagram of series resonance induction heating power, is controlled as shown in figure 4, it is used as by TMS320F2812
Core, can be achieved rectification Support Capacitor charge control, frequency-tracking, power closed-loop adjustment, pwm pulse occur, malfunction coefficient with
Protection.Whole control system is made up of DSP and its periphery detection sample circuit.Peripheral circuit has：Output current is mutual by electric current
Sensor detects and is divided into two-way, and the A/D interfaces for meeting DSP by signal conditioning circuit all the way provide instead for power closed-loop adjustment
Supply current, carry out power calculation；Another way takes over synchronization of the zero-detection circuit as frequency-tracking.Output voltage passes through voltage
Transformer detects and is divided into two-way, and the A/D interfaces for meeting DSP by signal conditioning circuit all the way provide for power closed-loop adjustment
Feedback voltage, carry out power calculation；Another way takes over zero-detection circuit and is used to carry out power calculation.DC voltage passes through Hall
Sensor is detected, and DSP A/D interfaces are connect by signal conditioning circuit, and DC current is detected by Hall sensor,
DSP A/D interfaces are connect by signal conditioning circuit.Software section mainly realizes that the charge control of Support Capacitor, separate excitation turn self-excitation
It is startup, digital phase-locked loop, power closed-loop adjustment, inversion pulse generation, display working condition, the function such as communicate with host computer, defeated
It has the protection of over-voltage and over-current and water temperature hydraulic pressure failure etc..DSP additionally provides input overvoltage/undervoltage and protected, overtemperature protection, overcurrent protection,
Open-circuit-protection, lock mutually unsuccessfully protection and the protection of water temperature hydraulic pressure failure etc..
More than, only presently preferred embodiments of the present invention, but protection scope of the present invention is not limited to and this is any to be familiar with sheet
Those skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in should all be covered
Within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by the protection domain that claim is defined.
Claims (7)
- A kind of 1. system of the continuous casting and rolling based on Frequency Induction Heating, it is characterised in that：Described system comprises at least：Two groups of intermediate frequency induction heating devices, every group of intermediate frequency induction heating device include multiple sensing heaters；Billet feeding line, it is made up of multiple tactic live-roller gears, each live-roller gear is by corresponding controlled variable-frequency motor Driving；The sensing heater of one group or two groups intermediate frequency induction heating device is provided between live-roller gear；Steel billet detection sensor, intermediate frequency induction heating device arrival end and the port of export being arranged on billet feeding line；PLC control devices, the detection signal of sensor and outside other signals are received, controlled variable-frequency electric is given with output control signal Machine driving live-roller gear operating and output control signal are added to any group or two groups of intermediate frequency induction heating devices with driving to sense Hot device heats to online steel billet.
- A kind of 2. system of continuous casting and rolling based on Frequency Induction Heating according to claim 1, it is characterised in that：Every group Intermediate frequency induction heating device is made up of medium frequency induction power supply, capacitor bank and three sensing heaters；Wherein, it is connected in series after the coil series connection of three described sensing heaters with capacitor bank.
- A kind of 3. Frequency Induction Heating system for continuous casting and rolling according to claim 1, it is characterised in that：Described Billet feeding line is made up of live-roller gear, and each live-roller gear is equipped with a frequency control motor, and PLC is become by controlling The rotating speed of frequency modulation speed motor controls the billet feeding line speed of service to realize；Described steel billet is run on live-roller gear, without friction between steel billet and sensing heater, improves the use of sensing heater Life-span.
- 4. intermediate frequency induction heating device according to claim 2, it is characterised in that：It is every in three described sensing heaters An individual sensing heater shorting switch all in parallel, PLC controls the disconnected open and close of any shorting switch, to change resonant inductance Size.
- A kind of 5. system of continuous casting and rolling based on Frequency Induction Heating according to claim 2, it is characterised in that：It is described Billet feeding line be to be made up of 7 live-roller gears；Wherein, three sensing heaters of first group of intermediate frequency induction heating device are set Put between the adjacent drive roller-way of billet feeding line inlet side；Three sensing heatings of second group of intermediate frequency induction heating device Device is arranged between the adjacent drive roller-way of billet feeding line outlet side；Also include three travel switches and three infrared thermometers, wherein the first travel switch and the first infrared thermometer peace Mounted in the entry position of first sensing heater of first group of intermediate frequency induction heating device, the second travel switch and second infrared Line temperature measurer is arranged on the outlet port of first group of sensing heater of intermediate frequency induction heating device the 3rd, third trip switch and the Three infrared thermometers are arranged on the outlet port of second group of sensing heater of intermediate frequency induction heating device the 3rd；Wherein, when steel billet touches travel switch, travel switch action, PLC control devices detect the action of travel switch Signal；Infrared thermometer detects the temperature signal of steel billet, and the temperature signal of steel billet is sent into PLC control devices；The steel billet temperature signal and travel switch signal that described PLC control devices obtain according to monitoring, to control steel billet to run The power output of speed and sensing heater, outlet temperature of the steel billet when rolling latter end sensing heater away from is set to reach billet rolling Temperature.
- A kind of 6. system of continuous casting and rolling based on Frequency Induction Heating according to claim 1, it is characterised in that：It is described PLC control devices be controlled in the steps below：If being detected in the first travel switch, first sensing of head end into the first group of intermediate frequency induction heating device of steel billet adds During hot device, if the temperature of the first infrared thermometer on-line real-time measuremen steel billet when between 750~930 DEG C, first group of intermediate frequency The induction heating power output rated power of induction heating apparatus；If the temperature that the first infrared thermometer detects steel billet in real time is small During in 750 DEG C or more than 930 DEG C, the induction heating power no-load running of first group of intermediate frequency induction heating device；If the second described travel switch detects that the tail end of steel billet leaves 1# sensing heaters, first group of Frequency Induction Heating The induction heating power no-load running of device；If the second described travel switch enters first of second group of intermediate frequency induction heating device in the head end for detecting steel billet Sensing heater, the temperature of the second infrared radiation thermometer on-line real-time measuremen steel billet is when between 750~930 DEG C, second group of intermediate frequency The induction heating power output rated power of induction heating apparatus；The temperature that second infrared radiation thermometer detects steel billet in real time is less than 750 DEG C or during more than 930 DEG C, the induction heating power no-load running of second group of intermediate frequency induction heating device.If described third trip switch detects that the tail end of steel billet leaves, second group of intermediate frequency induction heating device sensing heating Power supply no-load running.
- A kind of 7. system of continuous casting and rolling based on Frequency Induction Heating according to claim 6, it is characterised in that：It is described PLC control devices also include be controlled in the steps below：If one of which intermediate frequency induction heating device breaks down, another set intermediate frequency induction heating device general rule crosses PLC controls Power is transferred to maximum by device automatically, and outputs a control signal to billet feeding line to reduce the steel billet speed of travel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711049711.8A CN107876563A (en) | 2017-10-31 | 2017-10-31 | A kind of system of the continuous casting and rolling based on Frequency Induction Heating |
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| CN201711049711.8A CN107876563A (en) | 2017-10-31 | 2017-10-31 | A kind of system of the continuous casting and rolling based on Frequency Induction Heating |
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Cited By (5)
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| CN107896392A (en) * | 2017-10-30 | 2018-04-10 | 杭州富芝科技有限公司 | A kind of full-automatic heating in medium frequency machine of long bar |
| CN112248289A (en) * | 2019-07-22 | 2021-01-22 | 财团法人精密机械研究发展中心 | Infrared ray material drying machine |
| CN112525577A (en) * | 2020-11-23 | 2021-03-19 | 江西联创光电超导应用有限公司 | High-temperature superconducting induction heating transmission detection method, device and system |
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| CN114472549A (en) * | 2020-10-26 | 2022-05-13 | 上海宝信软件股份有限公司 | System and method for controlling heating temperature of edge of hot-rolled intermediate billet |
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| CN112248289A (en) * | 2019-07-22 | 2021-01-22 | 财团法人精密机械研究发展中心 | Infrared ray material drying machine |
| CN112248289B (en) * | 2019-07-22 | 2022-10-11 | 财团法人精密机械研究发展中心 | Infrared material drying machine |
| CN113141688A (en) * | 2020-01-17 | 2021-07-20 | 宝山钢铁股份有限公司 | Closed-loop control device and closed-loop control method for steel pipe multistage induction heating |
| CN114472549A (en) * | 2020-10-26 | 2022-05-13 | 上海宝信软件股份有限公司 | System and method for controlling heating temperature of edge of hot-rolled intermediate billet |
| CN114472549B (en) * | 2020-10-26 | 2024-03-29 | 上海宝信软件股份有限公司 | System and method for controlling edge heating temperature of hot-rolled intermediate blank |
| CN112525577A (en) * | 2020-11-23 | 2021-03-19 | 江西联创光电超导应用有限公司 | High-temperature superconducting induction heating transmission detection method, device and system |
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Application publication date: 20180406 |