CN110340161B - Heating device, rolling device and rolling method for on-line rolling of thick steel plate - Google Patents
Heating device, rolling device and rolling method for on-line rolling of thick steel plate Download PDFInfo
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- CN110340161B CN110340161B CN201910676095.1A CN201910676095A CN110340161B CN 110340161 B CN110340161 B CN 110340161B CN 201910676095 A CN201910676095 A CN 201910676095A CN 110340161 B CN110340161 B CN 110340161B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 216
- 239000010959 steel Substances 0.000 title claims abstract description 216
- 238000005096 rolling process Methods 0.000 title claims abstract description 162
- 238000010438 heat treatment Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000006698 induction Effects 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims description 95
- 230000002441 reversible effect Effects 0.000 claims description 26
- 230000008878 coupling Effects 0.000 claims description 15
- 238000010168 coupling process Methods 0.000 claims description 15
- 238000005859 coupling reaction Methods 0.000 claims description 15
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 4
- 241000935974 Paralichthys dentatus Species 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000010259 detection of temperature stimulus Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
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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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B1/30—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 plates, strips, bands or sheets of indefinite length in a non-continuous process
- B21B1/32—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
- B21B1/34—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
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- 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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/165—Control of thickness, width, diameter or other transverse dimensions responsive mainly to the measured thickness of the product
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
- B21B2013/021—Twin mills
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- General Induction Heating (AREA)
Abstract
The invention discloses a heating device, a rolling device and a rolling method for on-line rolling of a thick steel plate, and belongs to the field of rolling. The heating device comprises an alternating current power supply, an upper coil and a lower coil; the upper coil is positioned right above the lower coil; the left side and the right side of the upper coil are respectively bent towards the lower coil direction, and/or the left side and the right side of the lower coil are respectively bent towards the upper coil direction; a channel through which a thick steel plate to be rolled passes is arranged between the upper coil and the lower coil; and the alternating current power supply is used for supplying power to the upper coil and the lower coil respectively. The invention respectively carries out ultrasonic frequency induction heating and medium frequency induction heat compensation on different stages in the thick steel plate on-line rolling process by controlling the power supply to supply the same or opposite phase current to the special structure coil, so that the thick steel plate is efficiently and uniformly heated before rolling, the heating requirements of the thick steel plate on different stages in the on-line rolling process are finally realized, and the rolling quality and efficiency of the thick steel plate are greatly improved.
Description
Technical Field
The invention relates to the field of rolling, in particular to a heating device, a rolling device and a rolling method for on-line rolling of a thick steel plate.
Background
In reviewing the development history of the steel industry for over a century, since the beginning of the twentieth century, ferrous materials have become the main base materials for global applications, and about 90% of the steels have been produced by rolling. The high-efficiency steel rolling industry and technology enable steel rolling to be the main steel forming mode in the steel industry all the time, and the rolling method is adopted to produce steel, so that the production rate is high, the variety is multiple, and the mechanization and automation are easy to realize. However, when a thick steel billet is cogging and blooming, because the thickness of the billet is large, if the billet is not heated enough to reach the required rolling temperature, the billet will be torn directly due to large deformation generated during rolling, and the rolling mill will be damaged seriously, which causes great loss.
Disclosure of Invention
The invention provides a heating device, a rolling device and a rolling method for rolling a thick steel plate on line aiming at the problems, and aims to complete the rolling task through circularly reciprocating rolling.
The invention is realized by the following technical scheme: a heating device for rolling a thick steel plate on line is characterized by comprising an alternating current power supply, an upper coil and a lower coil; the upper coil is positioned right above the lower coil; the left side and the right side of the upper coil are respectively bent towards the lower coil direction, and/or the left side and the right side of the lower coil are respectively bent towards the upper coil direction; a channel through which a thick steel plate to be rolled passes is arranged between the upper coil and the lower coil; and the alternating current power supply is used for supplying power to the upper coil and the lower coil respectively.
The further technical proposal is that the front side of the upper coil and the front side of the lower coil form a channel outlet; the rear side edge of the upper coil and the rear side edge of the lower coil form a channel inlet; two sides of the heating device are respectively provided with a transmission device, wherein one transmission device is arranged at the inlet of the channel, and the other transmission device is arranged at the outlet of the channel.
The further technical proposal is that the transmission device is provided with 2 temperature measuring instruments and 1 thickness measuring instrument; the temperature measuring instruments are respectively arranged at the inlet and the outlet of the channel; the thickness gauge is arranged at the inlet of the channel or the outlet of the channel.
The further technical scheme is that the thermodetector is a Fluke brand E1RL model infrared thermodetector; the thickness gauge is a Beijing Ke cooperative instrumentation factory D900H-X type X-ray thickness gauge.
The further technical scheme is that the heating device further comprises a supporting platform, and the transmission device, the upper coil, the lower coil and the first power box are all arranged on the supporting platform; the transmission devices are transmission shafts arranged in rows and transmission motors for driving the transmission shafts to rotate; an upper screw driving motor and a lower screw driving motor are arranged in the first power box; the upper lead screw driving motor drives the upper coil to be far away from or close to the lower coil through the upper transmission lead screw; the lower lead screw driving motor drives the lower coil to be far away from or close to the upper coil through the lower transmission lead screw.
The further technical proposal lies in that the heating device is utilized.
The further technical scheme is that the device further comprises two reversible rolling mills, wherein the two reversible rolling mills are positioned between the two heating devices; and connected by a transmission device.
The further technical proposal is that the reversible rolling mill comprises a motor, a coupling, a gear seat, a connecting shaft and a rolling mill main body; the rolling mill main body comprises a rolling mill stand and rollers which are symmetrically arranged on the rolling mill stand from top to bottom; each roller is connected with a connecting shaft; the connecting shaft is meshed with a gear of the coupling inside the gear seat; the coupling is connected with the output shaft of the motor.
The technical scheme is that the thick steel plate on-line rolling method utilizes the thick steel plate on-line rolling device.
The further technical scheme is that the method comprises the following steps:
a. placing a thick steel plate to be rolled on a transmission shaft, controlling a transmission motor to rotate forward to drive the transmission shaft to rotate, and enabling the thick steel plate to be rolled to move forward along with the transmission shaft;
b. the thick steel plate to be rolled passes through the first upper coil and the first lower coil along with the transmission shaft; the first upper coil and the first lower coil input current with opposite phases at the same time, and the first upper coil and the first lower coil start to perform induction heating on the thick steel plate to be rolled, so that uniform heating is realized;
c. when the thick steel plate to be rolled passes through the second temperature measuring instrument, the second temperature measuring instrument records the temperature data of the thick steel plate to be rolled; then when the thick steel plate to be rolled passes through the first thickness gauge, the first thickness gauge records the thickness of the steel plate; comparing the real-time temperature with the optimal rolling temperature corresponding to the thickness of the steel plate: if the real-time temperature is approximately equal to the optimal rolling temperature, the thick steel plate continues to move forwards to prepare for rolling; if the real-time temperature is lower than the optimal rolling temperature, the transmission motor is rotated reversely, and the thick steel plate to be rolled passes through the first upper coil and the first lower coil again to be heated for the second time; when the thick steel plate to be rolled is heated for the second time, the thick steel plate to be rolled passes through a first temperature measuring instrument, and the first temperature measuring instrument records the temperature data of the thick steel plate to be rolled; the computer control system compares the real-time temperature with the optimal rolling temperature again, and stops the induction heating of the thick steel plate to be rolled by the first upper coil and the first lower coil if the real-time temperature is approximately equal to the optimal rolling temperature; controlling a transmission motor to rotate forwards to enable the thick steel plate to move forwards to prepare for rolling; if the real-time temperature is lower than the optimal rolling temperature, repeating the step c again;
d. the thick steel plate to be rolled passes through a reversible rolling mill at a constant speed to be rolled for the first time;
e. when the thick steel plate to be rolled passes through the reversible rolling mill, the thick steel plate passes through a second thickness gauge, the second thickness gauge records the thickness of the steel plate, and the gap between a second upper coil and a second lower coil is adjusted according to the thickness of the steel plate;
f. the thick steel plate to be rolled passes through the second upper coil and the second lower coil along with the transmission shaft; the second upper coil and the second lower coil input current with opposite phases at the same time, and the second upper coil and the second lower coil start to perform induction heating on the thick steel plate to be rolled, so that uniform heating is realized;
g. when the thick steel plate to be rolled passes through the fourth temperature measuring instrument, the fourth temperature measuring instrument records the temperature data of the thick steel plate to be rolled; comparing the real-time temperature with the optimal rolling temperature corresponding to the thickness of the steel plate: if the real-time temperature is approximately equal to the optimal rolling temperature, the thick steel plate continues to move forwards to prepare for rolling; if the real-time temperature is lower than the optimal rolling temperature, the transmission motor is rotated reversely, and the thick steel plate to be rolled passes through the second upper coil and the second lower coil again to be heated for the second time; when the thick steel plate to be rolled is heated for the second time, the thick steel plate to be rolled passes through a third temperature measuring instrument, and the third temperature measuring instrument records the temperature data of the thick steel plate to be rolled; comparing the real-time temperature with the optimal rolling temperature again, and stopping the induction heating of the second upper coil and the second lower coil on the thick steel plate to be rolled if the real-time temperature is approximately equal to the optimal rolling temperature; controlling a transmission motor to rotate, and enabling the thick steel plate to move backwards to prepare for rolling; if the real-time temperature is lower than the optimal rolling temperature, repeating the step g again;
h. the thick steel plate to be rolled passes through the reversible rolling mill at a constant speed to be rolled again;
i. and c, repeating the steps c-h until the thickness of the thick steel plate to be rolled reaches the target thickness, and finishing rolling.
Compared with the prior art, the invention has the following advantages:
1. the power supplies input opposite phase currents to the upper coil and the lower coil simultaneously, the ultrasonic induction heating can be carried out on the thick steel plate, the direction of the current in the coil at a certain moment is shown in figure 2, and approximate annular current can be formed on 6 surfaces of a special ring sleeve structure formed by the upper coil and the lower coil, so that the thick steel plate can be efficiently, quickly and uniformly heated.
2. The power supply inputs the same phase current to the upper coil and the lower coil simultaneously, the medium-frequency induction heat compensation can be carried out on the thick steel plate, the current direction in the coils at a certain moment is shown in figure 3, and at the moment, the approximate annular current is formed on the upper surface and the lower surface of the special ring sleeve structure formed by the upper coil and the lower coil, so that the thick steel plate is uniformly compensated with heat.
3. After the thick steel plate is rolled, according to the steel plate thickness fed back by the thickness gauge, the distance between the upper coil and the lower coil is changed, so that the distance is always suitable for the current thickness of the steel plate, and the induction heating and heat supplementing effects are guaranteed.
4. The real-time detection of temperature and thickness is continuously carried out to the steel plate around whole rolling process heating, and then the induction heating of the different stages of accurate control steel plate on-line rolling in-process, accomplish super audio induction heating and medium frequency induction concurrent heating, make the steel plate obtain high efficiency, quick, even heating before rolling, obtain even concurrent heating after rolling, finally realize the heating demand of the different stages of the steel plate on-line rolling process, improve the rolling quality and the efficiency of steel plate greatly.
Drawings
FIG. 1 is an isometric view of a preferred embodiment of the device of the present invention;
FIG. 2 is a schematic diagram of the direction of the coil superaudio induction heating current of a preferred embodiment of the apparatus of the present invention;
FIG. 3 is a schematic diagram of the direction of the medium frequency induction concurrent heating current of the coil of the preferred embodiment of the apparatus of the present invention;
FIG. 4 is a first lower coil part view of a preferred embodiment of the apparatus of the present invention;
FIG. 5 is a diagram of the internal structure of a power box in accordance with a preferred embodiment of the apparatus of the present invention;
FIG. 6 is a flow chart of the operation of a preferred embodiment of the apparatus of the present invention;
in the figure: 1. a support platform; 2. a drive motor; 3. a drive shaft; 4. a thick steel plate is to be rolled; 5. a first temperature measuring instrument; 6. a first upper coil; 7. a first lower coil; 8. a first power supply box; 9. a second temperature measuring instrument; 10. a first thickness gauge; 11. an electric motor; 12. a coupling; 13. a gear seat; 14. a connecting shaft; 15. a reversing mill; 16. a second thickness gauge; 17. a third temperature measuring instrument; 18. a second power supply box; 19. a second lower coil; 20. a second upper coil; 21. a fourth temperature measuring instrument; 22. a lower coil terminal; 23. an upper coil terminal; 24. an upper drive screw; 25. an upper screw driving motor; 26. a lower drive screw; 27. the lower screw drives the motor.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the embodiment of the present invention, as shown in fig. 2 to 5, the heating device for rolling a thick steel plate on line includes an ac power supply, an upper coil, and a lower coil; the upper coil is positioned right above the lower coil; the left side and the right side of the upper coil are respectively bent towards the lower coil direction, and/or the left side and the right side of the lower coil are respectively bent towards the upper coil direction; a channel through which the thick steel plate 4 to be rolled passes is arranged between the upper coil and the lower coil; and the alternating current power supply is used for supplying power to the upper coil and the lower coil respectively.
In the embodiment of the present invention, as shown in fig. 1 to 5, the front side of the upper coil and the front side of the lower coil form a channel outlet; the rear side edge of the upper coil and the rear side edge of the lower coil form a channel inlet; two sides of the heating device are respectively provided with a transmission device, wherein one transmission device is arranged at the inlet of the channel, and the other transmission device is arranged at the outlet of the channel.
In the embodiment of the invention, as shown in the heating device shown in fig. 1, 2 temperature measuring instruments and 1 thickness measuring instrument are arranged on the transmission device; the temperature measuring instruments are respectively arranged at the inlet and the outlet of the channel; the thickness gauge is arranged at the inlet of the channel or the outlet of the channel.
In the embodiment of the invention, as shown in the heating device shown in fig. 1, the temperature measuring instrument is a Fluke brand E1RL model infrared temperature measuring instrument; the thickness gauge is a Beijing Ke cooperative instrumentation factory D900H-X type X-ray thickness gauge.
In the embodiment of the invention, as shown in the heating device shown in fig. 1, the heating device further comprises a supporting platform 1, and the transmission device, the upper coil, the lower coil and the first power box 8 are all arranged on the supporting platform 1; the transmission device is a transmission shaft 3 arranged in rows and a transmission motor 2 for driving the transmission shaft 3 to rotate.
Wherein, an upper screw rod driving motor 25 and a lower screw rod driving motor 27 are arranged in the first power box 8; the upper screw rod driving motor 25 drives the upper coil to be far away from or close to the lower coil through the upper transmission screw rod 24; the lower lead screw drive motor 27 drives the lower coil away from or close to the upper coil through the lower drive lead screw 26.
In the embodiment of the invention, inside the first power box 8, the upper coil is electrically connected with the upper coil terminal 23, and the lower coil is electrically connected with the lower coil terminal 22; the upper coil terminal 23 is in threaded connection with an upper transmission screw rod 24, and the lower coil terminal 22 is in threaded connection with a lower transmission screw rod 26; a linear type opening is arranged on the shell of the first power box 8 and used as a sliding track. The upper coil terminal 23 and the lower coil terminal 22 are respectively connected with the corresponding coils after extending out of the gaps.
Please provide the internal structure of the first power box 8, only the internal structure can realize the adjustment of the distance between the two coils.
In the embodiment of the present invention, as shown in fig. 1, a thick steel plate on-line rolling apparatus using the heating apparatus described in the above embodiment is provided.
In the embodiment of the present invention, the thick steel plate on-line rolling device shown in fig. 1 further includes two reversing mills 15, the two heating devices are provided, and the reversing mills 15 are located between the two heating devices; and connected by a transmission device.
In the embodiment of the present invention, as shown in fig. 1, the thick steel plate on-line rolling device comprises a reversible rolling mill 15, a motor 11, a coupling 12, a gear seat 13, a connecting shaft 14 and a rolling mill main body; the rolling mill main body comprises a rolling mill stand and rollers which are symmetrically arranged on the rolling mill stand from top to bottom; each of said rolls is associated with a connecting shaft 14; the connecting shaft 14 is meshed with the gear of the coupling 12 inside the gear seat 13; the coupling 12 is connected to the output shaft of the motor 11.
In the embodiment of the invention, as shown in fig. 1-5, the thick steel plate on-line rolling device comprises a motor 11, a coupling 12, a gear seat 13, a connecting shaft 14 and a reversible rolling mill 15. The reversible rolling mill 15 is positioned in the middle of the whole device, and a roller is connected with the connecting shaft 14 in a matching way; the connecting shafts 14 are positioned between the reversing mill 15 and the gear seat 13, the two connecting shafts 14 are distributed in parallel in the vertical direction, and two ends of the two connecting shafts are respectively connected with the reversing mill 15 and the gear seat 13 in a matching way; the gear seat 13 is positioned behind the connecting shafts 14, is respectively matched and connected with the two connecting shafts 14, and is matched with the reversible rolling mill 15 through the connecting shafts 14; the coupling 12 is positioned between the gear seat 13 and the motor 11 and is respectively matched and connected with the gear seat 13 and the motor 11; the motor 11 is positioned behind the coupling 12, is matched and connected with the coupling 12 and is matched with the gear seat 13 through the coupling 12; the heating device comprises a supporting platform 1, a transmission motor 2, a transmission shaft 3, a thick steel plate 4 to be rolled, a first upper coil 6, a first lower coil 7, a first power box 8, a second power box 18, a second upper coil 20 and a second lower coil 19. The supporting platforms 1 are distributed under the whole device at intervals, the structure is stable, and the surface is horizontal; the transmission motor 2 and the transmission shaft 3 are both positioned on the supporting platform 1, the transmission motor 2 is connected with the end part of the transmission shaft 3 in a matching way, and the transmission motor 2 and the transmission shaft 3 are closely distributed on the supporting platform 1, and the height of the transmission shaft 3 is matched with that of the reversible rolling mill 15; the thick steel plate 4 to be rolled is horizontally placed on the transmission shaft 3, is supported by the transmission shaft 3 and can move back and forth along with the forward rotation and the reverse rotation of the transmission shaft 3; the first power box 8 is positioned on the left side of the reversible rolling mill 15, and the front surface of the first power box 8 is provided with an upper pair of independent electrode connecting plates and a lower pair of independent electrode connecting plates; the first upper coil 6 and the first lower coil 7 are identical in shape, are square and annular in the horizontal direction and are semi-annular in the vertical direction, the first upper coil 6 and the first lower coil 7 are fixedly connected with two pairs of electrode connecting plates of a first power box 8 through bolts respectively, and are opened inwards in the vertical direction to form a special ring sleeve structure which is uniformly surrounded on the outer side of the thick steel plate 4 to be rolled; the second power box 18 is positioned at the right side of the reversible rolling mill 15, and the front surface of the second power box 18 is provided with an upper pair of independent electrode connecting plates and a lower pair of independent electrode connecting plates; the second upper coil 20 and the second lower coil 19 are in the same shape, are in a square ring shape in the horizontal direction and are in a semi-ring shape in the vertical direction, the second upper coil 20 and the second lower coil 19 are fixedly connected with two pairs of electrode connecting plates of the second power box 18 through bolts respectively, and are opened inwards in the vertical direction to form a special ring sleeve structure which is uniformly surrounded on the outer side of the thick steel plate 4 to be rolled; the control system comprises a first temperature measuring instrument 5, a second temperature measuring instrument 9, a first thickness measuring instrument 10, a second thickness measuring instrument 16, a third temperature measuring instrument 17, a fourth temperature measuring instrument 21 and a computer control system. The computer control system is respectively in signal connection with the first power supply box 8, the second power supply box 18, the first thickness gauge 10, the second thickness gauge 16, the first temperature gauge 5, the second temperature gauge 9, the third temperature gauge 17, the fourth temperature gauge 21 and the transmission motor 2; the first thickness gauge 10 is positioned between the first power box 8 and the reversible rolling mill 15, is of a C-shaped structure, and is provided with an adjustable guide rail at the bottom; the first temperature measuring instrument 5 is positioned on the left side of the first power box 8 and is positioned right above the central axis of the thick steel plate 4 to be rolled; the second temperature measuring instrument 9 is positioned between the first power box 8 and the first thickness measuring instrument 10 and is positioned right above the central axis of the thick steel plate 4 to be rolled; the second thickness gauge 16 is positioned between the second power box 18 and the reversible rolling mill 15, is C-shaped, and is provided with an adjustable guide rail at the bottom; the third temperature measuring instrument 17 is positioned between the second power box 18 and the second thickness measuring instrument 16 and is positioned right above the central axis of the thick steel plate 4 to be rolled; the fourth temperature measuring instrument 21 is positioned on the right side of the second power box 18 and is positioned right above the central axis of the thick steel plate 4 to be rolled; the transmission motors 2 are mutually connected in a signal mode and move synchronously; the length of the conveyor belts formed by arranging and distributing the transmission shafts 3 on the two sides of the first power box 8 and the second power box 18 is not less than the length of the thick steel plate 4 to be rolled; the first power box 8 and the second power box 18 can output the same or opposite phase current through two pairs of electrode connecting plates, and the upper and lower pairs of electrode connecting plates can move up and down to change the coil distance; the first upper coil 6, the first lower coil 7, the second upper coil 20 and the second lower coil 19 are hollow structures.
In the embodiment of the present invention, as shown in fig. 1 and 6, a thick steel plate on-line rolling method is used, which uses a thick steel plate on-line rolling device in the above embodiment.
In the embodiment of the invention, as shown in fig. 1 and 6, the thick steel plate on-line rolling method comprises the following steps:
a. placing a thick steel plate 4 to be rolled on a transmission shaft 3, controlling the transmission motor 2 to rotate forward to drive the transmission shaft 3 to rotate, and enabling the thick steel plate 4 to be rolled to move forward along with the transmission shaft 3;
b. the thick steel plate 4 to be rolled passes through the first upper coil 6 and the first lower coil 7 along with the transmission shaft 3; the first upper coil 6 and the first lower coil 7 simultaneously input currents with opposite phases, and the first upper coil 6 and the first lower coil 7 start to perform induction heating on the thick steel plate 4 to be rolled so as to realize uniform heating;
c. when the thick steel plate 4 to be rolled passes through the second temperature measuring instrument 9, the second temperature measuring instrument 9 records the temperature data of the thick steel plate 4 to be rolled; then, when the thick steel plate 4 to be rolled passes through the first thickness gauge 10, the first thickness gauge 10 records the thickness of the steel plate; comparing the real-time temperature with the optimal rolling temperature corresponding to the thickness of the steel plate: if the real-time temperature is approximately equal to the optimal rolling temperature, the thick steel plate 4 to be rolled continues to move forwards to prepare for rolling; if the real-time temperature is lower than the optimal rolling temperature, the transmission motor 2 is rotated reversely, and the thick steel plate 4 to be rolled passes through the first upper coil 6 and the first lower coil 7 again to be heated for the second time; when the thick steel plate 4 to be rolled passes through the first temperature measuring instrument 5 after being heated for the second time, the first temperature measuring instrument 5 records the temperature data of the thick steel plate 4 to be rolled; the computer control system compares the real-time temperature with the optimal rolling temperature again, and stops the induction heating of the thick steel plate 4 to be rolled by the first upper coil 6 and the first lower coil 7 if the real-time temperature is approximately equal to the optimal rolling temperature; controlling the transmission motor 2 to rotate forwards to enable the thick steel plate 4 to be rolled to move forwards to prepare for rolling; if the real-time temperature is lower than the optimal rolling temperature, repeating the step c again;
d. the thick steel plate 4 to be rolled passes through the reversible rolling mill 15 at a constant speed to be rolled for the first time;
e. when the thick steel plate 4 to be rolled passes through the reversible rolling mill 15, the thick steel plate passes through the second thickness gauge 16, the second thickness gauge 16 records the thickness of the steel plate, and the gap between the second upper coil 20 and the second lower coil 19 is adjusted according to the thickness of the steel plate;
f. the thick steel plate 4 to be rolled passes through the second upper coil 20 and the second lower coil 19 along with the transmission shaft 3; the second upper coil 20 and the second lower coil 19 simultaneously input currents with opposite phases, and the second upper coil 20 and the second lower coil 19 start to perform induction heating on the thick steel plate 4 to be rolled so as to realize uniform heating;
g. when the thick steel plate 4 to be rolled passes through the fourth temperature measuring instrument 21, the fourth temperature measuring instrument 21 records the temperature data of the thick steel plate 4 to be rolled; comparing the real-time temperature with the optimal rolling temperature corresponding to the thickness of the steel plate: if the real-time temperature is approximately equal to the optimal rolling temperature, the thick steel plate 4 to be rolled continues to move forwards to prepare for rolling; if the real-time temperature is lower than the optimal rolling temperature, the transmission motor 2 is rotated reversely, and the thick steel plate 4 to be rolled passes through the second upper coil 20 and the second lower coil 19 again to be heated secondarily; when the thick steel plate 4 to be rolled passes through the third temperature measuring instrument 17 after being heated for the second time, the third temperature measuring instrument 17 records the temperature data of the thick steel plate 4 to be rolled; comparing the real-time temperature with the optimal rolling temperature again, and stopping the induction heating of the thick steel plate 4 to be rolled by the second upper coil 20 and the second lower coil 19 if the real-time temperature is approximately equal to the optimal rolling temperature; controlling the transmission motor 2 to rotate, and enabling the thick steel plate 4 to be rolled to move backwards to prepare for rolling; if the real-time temperature is lower than the optimal rolling temperature, repeating the step g again;
h. the thick steel plate 4 to be rolled passes through the reversible rolling mill 15 at a constant speed to be rolled again;
i. and (e) repeating the steps c-h until the thickness of the thick steel plate 4 to be rolled reaches the target thickness, and finishing rolling.
The method is realized by the following steps:
a. a thick steel plate 4 to be rolled is placed on the drive shaft 3. The computer control system starts to work, the transmission motor 2 is controlled to rotate positively to drive the transmission shaft 3 to rotate, and the thick steel plate 4 to be rolled moves forwards along with the transmission shaft 3.
b. When the transmission shaft 3 transmits the thick steel plate 4 to be rolled to the first upper coil 6 and the first lower coil 7, the first power box 8 starts to work, the upper and lower pairs of electrode connecting plates simultaneously output currents with opposite phases, the first upper coil 6 and the first lower coil 7 start to perform ultrasonic frequency induction heating on the thick steel plate 4 to be rolled, and meanwhile, the thick steel plate 4 to be rolled moves forwards along with the transmission shaft 3 and passes through the first upper coil 6 and the first lower coil 7 at a constant speed to realize uniform heating.
c. When the thick steel plate 4 to be rolled passes through the second temperature measuring instrument 9, the second temperature measuring instrument 9 feeds back the temperature data of the thick steel plate 4 to be rolled to the computer control system in real time; and then when the thick steel plate 4 to be rolled passes through the first thickness gauge 10, the first thickness gauge 10 feeds back the thickness of the steel plate to the computer control system. The computer control system compares the real-time temperature of the thick steel plate 4 to be rolled with the optimal rolling temperature corresponding to the current thickness of the steel plate: if the real-time temperature is approximately equal to the optimal rolling temperature of the current thickness, the computer control system closes the first power box 8 to enable the thick steel plate 4 to be rolled to continue to move forwards to prepare for rolling; if the real-time temperature is lower than the current optimal rolling temperature, the computer control system controls the transmission motor 2 to rotate reversely after the whole thick steel plate 4 to be rolled passes through the first upper coil 6 and the first lower coil 7, so that the thick steel plate 4 to be rolled passes through the first upper coil 6 and the first lower coil 7 again to be heated for the second time. When the thick steel plate 4 to be rolled passes through the first temperature measuring instrument 5 after being heated for the second time, the first temperature measuring instrument 5 feeds back the temperature data of the steel plate to the computer control system in real time, the computer control system compares the real-time temperature of the thick steel plate 4 to be rolled with the optimal rolling temperature corresponding to the current thickness of the steel plate again, if the real-time temperature is approximately equal to the optimal rolling temperature of the current thickness, the computer control system closes the first power box 8, controls the transmission motor 2 to rotate forwards, and enables the thick steel plate 4 to be rolled to move forwards to prepare for rolling; if the real-time temperature is lower than the optimal rolling temperature of the current thickness, after the whole thick steel plate 4 to be rolled passes through the first upper coil 6 and the first lower coil 7, the computer control system controls the transmission motor 2 to rotate forwards, so that the thick steel plate 4 to be rolled passes through the first upper coil 6 and the first lower coil 7 again to be heated for three times. And c, when the thick steel plate 4 to be rolled is heated for three times, passing through a second temperature measuring instrument 9, and repeating the step c.
d. The thick steel plate 4 to be rolled passes through the reversible rolling mill 15 at a constant speed to be rolled for the first time.
e. When the thick steel plate 4 to be rolled passes through the reversible rolling mill 15 and then passes through the second thickness gauge 16, the second thickness gauge 16 feeds the thickness of the steel plate back to the computer control system, and the computer control system adjusts the positions of the two pairs of electrodes on the second power box 18 and changes the positions of the second upper coil 20 and the second lower coil 19. Two pairs of mutually independent movable electrode connecting plates are arranged on the front surface of the power supply and are respectively matched with a lead screw guide rail in the power supply, and the upper and lower two pairs of electrode connecting plates can simultaneously move towards opposite directions under the driving of the lead screw guide rail in the power supply to adjust the distance between the two electrode connecting plates.
f. When the thick steel plate 4 to be rolled is conveyed to the second upper coil 20 and the second lower coil 19 by the transmission shaft 3, the second power box 18 starts to work, the upper and lower pairs of electrode connecting plates simultaneously output currents with the same phase, the second upper coil 20 and the second lower coil 19 start to perform medium-frequency induction heat compensation on the thick steel plate 4 to be rolled, and meanwhile, the thick steel plate 4 to be rolled moves forwards along with the transmission shaft 3 and passes through the second upper coil 20 and the second lower coil 19 at a constant speed to realize uniform heat compensation.
g. When the thick steel plate 4 to be rolled passes through the fourth temperature measuring instrument 21, the fourth temperature measuring instrument 21 feeds back the temperature data of the thick steel plate 4 to be rolled to the computer control system in real time, the computer control system compares the real-time temperature of the thick steel plate 4 to be rolled with the optimal rolling temperature corresponding to the current thickness of the steel plate, if the real-time temperature is approximately equal to the optimal rolling temperature of the current thickness, the computer control system closes the second power box 18 after the whole thick steel plate 4 to be rolled passes through the second upper coil 20 and the second lower coil 19, controls the transmission motor 2 to rotate reversely, and enables the thick steel plate 4 to be rolled to move backwards to prepare for rolling; if the real-time temperature is lower than the current optimal rolling temperature, after the whole thick steel plate 4 to be rolled passes through the second upper coil 20 and the second lower coil 19, the computer control system controls the transmission motor 2 to rotate reversely, so that the thick steel plate 4 to be rolled passes through the second upper coil 20 and the second lower coil 19 again to perform secondary heat compensation. When the thick steel plate 4 to be rolled passes through the third temperature measuring instrument 17 after secondary heat compensation, the third temperature measuring instrument 17 feeds the temperature data of the steel plate back to the computer control system in real time, the computer control system compares the real-time temperature of the thick steel plate 4 to be rolled with the optimal rolling temperature corresponding to the current thickness of the steel plate again, if the real-time temperature is approximately equal to the optimal rolling temperature of the current thickness, the computer control system closes the second power box 18, so that the thick steel plate 4 to be rolled continues to move backwards to prepare for rolling; if the real-time temperature is lower than the optimal rolling temperature of the current thickness, after the whole thick steel plate 4 to be rolled passes through the second upper coil 20 and the second lower coil 19, the computer control system controls the transmission motor 2 to rotate forwards, so that the thick steel plate 4 to be rolled passes through the second upper coil 20 and the second lower coil 19 again to perform heat compensation for three times. And (5) when the thick steel plate to be rolled is subjected to heat compensation for 4 times, passing through a fourth temperature measuring instrument 21, and repeating the step g.
h. The thick steel plate 4 to be rolled passes through the reversible rolling mill 15 at a constant speed to be rolled.
i. And e, repeating the steps e to h until the thickness of the thick steel plate 4 to be rolled reaches the target thickness, and finishing rolling.
The above embodiment can confirm from the side that the invention passes the same or opposite phase current to the special structure coil through the control power supply, and respectively carries out the ultrasonic frequency induction heating and the intermediate frequency induction heat supplementing at different stages in the process of rolling the thick steel plate 4 on line, so that the thick steel plate 4 to be rolled is efficiently and uniformly heated before rolling, the heating requirements of the thick steel plate 4 to be rolled at different stages in the process of rolling on line are finally realized, and the quality and the efficiency of rolling the thick steel plate are greatly improved.
Claims (10)
1. A heating device for rolling a thick steel plate on line is characterized by comprising an alternating current power supply, an upper coil and a lower coil; the upper coil is positioned right above the lower coil; the left side and the right side of the upper coil are respectively bent towards the lower coil direction, and/or the left side and the right side of the lower coil are respectively bent towards the upper coil direction; a channel through which a thick steel plate to be rolled passes is arranged between the upper coil and the lower coil; the alternating current power supply supplies power to the upper coil and the lower coil respectively, opposite phase currents are input into the upper coil and the lower coil by the alternating current power supply simultaneously, the thick steel plate is subjected to ultrasonic frequency induction heating, and approximate annular currents are formed on 6 surfaces of a special ring sleeve structure formed by the upper coil and the lower coil; the alternating current power supply inputs the same phase current to the upper coil and the lower coil at the same time, medium-frequency induction heat compensation is carried out on the thick steel plate, and approximate annular current is formed on the upper surface and the lower surface of a special ring sleeve structure formed by the upper coil and the lower coil.
2. The heating device of claim 1, wherein the front side of the upper coil and the front side of the lower coil form a channel outlet; the rear side edge of the upper coil and the rear side edge of the lower coil form a channel inlet; two sides of the heating device are respectively provided with a transmission device, wherein one transmission device is arranged at the inlet of the channel, and the other transmission device is arranged at the outlet of the channel.
3. The heating device according to claim 2, wherein 2 thermometers and 1 thickness gauge are arranged on the transmission device; the temperature measuring instruments are respectively arranged at the inlet and the outlet of the channel; the thickness gauge is arranged at the inlet of the channel or the outlet of the channel.
4. A heating device as claimed in claim 3, wherein the temperature detector is a Fluke brand E1RL model infrared temperature detector; the thickness gauge is a Beijing Ke cooperative instrumentation factory D900H-X type X-ray thickness gauge.
5. The heating device of claim 2, further comprising a support platform, wherein the transmission device, the upper coil, the lower coil, and the first power box are disposed on the support platform; the transmission devices are transmission shafts arranged in rows and transmission motors for driving the transmission shafts to rotate; an upper screw driving motor and a lower screw driving motor are arranged in the first power box; the upper lead screw driving motor drives the upper coil to be far away from or close to the lower coil through the upper transmission lead screw; the lower lead screw driving motor drives the lower coil to be far away from or close to the upper coil through the lower transmission lead screw.
6. An in-line rolling apparatus for thick steel plate, characterized by using the heating apparatus according to any one of claims 1 to 5.
7. The thick steel plate on-line rolling device according to claim 6, further comprising two reversing mills, wherein the two heating devices are located between the two reversing mills; and connected by a transmission device.
8. An in-line rolling apparatus for thick steel plate according to claim 7, wherein said reversible rolling mill comprises a motor, a coupling, a gear holder, a connecting shaft and a mill body; the rolling mill main body comprises a rolling mill stand and rollers which are symmetrically arranged on the rolling mill stand from top to bottom; each roller is connected with a connecting shaft; the connecting shaft is meshed with a gear of the coupling inside the gear seat; the coupling is connected with the output shaft of the motor.
9. An in-line rolling method of a thick steel plate, characterized by using the in-line rolling apparatus of a thick steel plate according to any one of claims 6 to 8.
10. The thick steel plate on-line rolling method according to claim 9, comprising the steps of:
a. placing a thick steel plate to be rolled on a transmission shaft, controlling a transmission motor to rotate forward to drive the transmission shaft to rotate, and enabling the thick steel plate to be rolled to move forward along with the transmission shaft;
b. the thick steel plate to be rolled passes through the first upper coil and the first lower coil along with the transmission shaft; the first upper coil and the first lower coil input current with opposite phases at the same time, and the first upper coil and the first lower coil start to perform induction heating on the thick steel plate to be rolled, so that uniform heating is realized;
c. when the thick steel plate to be rolled passes through the second temperature measuring instrument, the second temperature measuring instrument records the temperature data of the thick steel plate to be rolled; then when the thick steel plate to be rolled passes through the first thickness gauge, the first thickness gauge records the thickness of the steel plate; comparing the real-time temperature with the optimal rolling temperature corresponding to the thickness of the steel plate: if the real-time temperature is equal to the optimal rolling temperature, the thick steel plate continues to move forwards to prepare for rolling; if the real-time temperature is lower than the optimal rolling temperature, the transmission motor is rotated reversely, and the thick steel plate to be rolled passes through the first upper coil and the first lower coil again to be heated for the second time; when the thick steel plate to be rolled is heated for the second time, the thick steel plate to be rolled passes through a first temperature measuring instrument, and the first temperature measuring instrument records the temperature data of the thick steel plate to be rolled; the computer control system compares the real-time temperature with the optimal rolling temperature again, and stops the induction heating of the thick steel plate to be rolled by the first upper coil and the first lower coil if the real-time temperature is equal to the optimal rolling temperature; controlling a transmission motor to rotate forwards to enable the thick steel plate to move forwards to prepare for rolling; if the real-time temperature is lower than the optimal rolling temperature, repeating the step c again;
d. the thick steel plate to be rolled passes through a reversible rolling mill at a constant speed to be rolled for the first time;
e. when the thick steel plate to be rolled passes through the reversible rolling mill, the thick steel plate passes through a second thickness gauge, the second thickness gauge records the thickness of the steel plate, and the gap between a second upper coil and a second lower coil is adjusted according to the thickness of the steel plate;
f. the thick steel plate to be rolled passes through the second upper coil and the second lower coil along with the transmission shaft; the second upper coil and the second lower coil input current with opposite phases at the same time, and the second upper coil and the second lower coil start to perform induction heating on the thick steel plate to be rolled, so that uniform heating is realized;
g. when the thick steel plate to be rolled passes through the fourth temperature measuring instrument, the fourth temperature measuring instrument records the temperature data of the thick steel plate to be rolled; comparing the real-time temperature with the optimal rolling temperature corresponding to the thickness of the steel plate: if the real-time temperature is equal to the optimal rolling temperature, the thick steel plate continues to move forwards to prepare for rolling; if the real-time temperature is lower than the optimal rolling temperature, the transmission motor is rotated reversely, and the thick steel plate to be rolled passes through the second upper coil and the second lower coil again to be heated for the second time; when the thick steel plate to be rolled is heated for the second time, the thick steel plate to be rolled passes through a third temperature measuring instrument, and the third temperature measuring instrument records the temperature data of the thick steel plate to be rolled; comparing the real-time temperature with the optimal rolling temperature again, and stopping the induction heating of the second upper coil and the second lower coil on the thick steel plate to be rolled if the real-time temperature is equal to the optimal rolling temperature; controlling a transmission motor to rotate, and enabling the thick steel plate to move backwards to prepare for rolling; if the real-time temperature is lower than the optimal rolling temperature, repeating the step g again;
h. the thick steel plate to be rolled passes through the reversible rolling mill at a constant speed to be rolled again;
i. and c, repeating the steps c-h until the thickness of the thick steel plate to be rolled reaches the target thickness, and finishing rolling.
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| CN113664057A (en) * | 2021-08-27 | 2021-11-19 | 江阴中意电气有限公司 | Magnesium alloy plate induction heater |
| CN114054504A (en) * | 2022-01-19 | 2022-02-18 | 海门市佳博铸造有限公司 | Adjustable metal rolling device |
| CN115213243B (en) * | 2022-07-21 | 2024-05-14 | 辽宁科技大学 | Billet heating device and method |
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