CN112676342A - Heating device and method in plate rolling process - Google Patents
Heating device and method in plate rolling process Download PDFInfo
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- CN112676342A CN112676342A CN202110088945.3A CN202110088945A CN112676342A CN 112676342 A CN112676342 A CN 112676342A CN 202110088945 A CN202110088945 A CN 202110088945A CN 112676342 A CN112676342 A CN 112676342A
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Abstract
The invention relates to a heating device and a heating method in a plate rolling process, which comprise a movable induction coil group for integral heating, a crawler-type induction coil group for heat compensation, a first temperature measuring instrument, a second temperature measuring instrument and a plate type instrument, wherein a conveying belt is used for driving a plate to move at a constant speed on a production line, and the plate is initially heated and compensated by the integral induction coil and the crawler-type induction coil group, so that the plate integrally reaches the optimal rolling temperature. The crawler-type induction coil group and the plate move synchronously, and the temperature measuring instrument and the plate profile instrument detect the surface temperature and the shape of the plate in real time, so that point-to-point accurate heat compensation of the small coil in the heating process is realized, the phenomenon that local temperature difference is too large due to uneven surface shapes of the plate such as poor plate shape, medium wave and plate profile change in the heating process is reduced, the plate is accurately and uniformly heated before rolling, ideal temperature distribution is achieved, the heating requirements of the plate in different rolling stages are met, and the rolling quality is improved.
Description
Technical Field
The invention belongs to the technical field of plate continuous rolling, and particularly relates to a heating device and method in a plate rolling process.
Background
In the world of today, steel rolling technology is rapidly developing. The steel rolling production makes great progress in the aspects of automation, high precision and continuity, and becomes a mature, stable and efficient production line. The plate and strip are also widely used steel, the plate and strip yield in China accounts for 45% -55% of the total yield of the steel, and most of the plate and strip are produced by a rolling method. The plate produced by the rolling method has high production rate and a plurality of varieties, and is easy to realize mechanization and automation.
In actual production, most of the plates are heated or preheated by a heating furnace. By using the heating mode, the deformation of the plate is large, the energy utilization rate is low, and the burden of an enterprise is increased while resources are wasted. Based on this, the advanced induction heating heat treatment process is rapidly developed, and the metal can obtain very high temperature in a short time, so as to realize rapid heating. Compared with the traditional heating mode, the heating method can achieve the heating purpose and is easy to realize mechanization and automation, thereby being an advanced green heat treatment process. However, due to factors such as poor plate shape, medium wave, curled crease, cooling wrinkle or plate shape change in the heating process, the heating is not uniform, the temperature difference is too large, and the rolling quality of the plate is seriously affected.
Disclosure of Invention
The invention provides a heating device and a heating method for a plate rolling process, aiming at the problems, the crawler-type induction coil group and the plate move synchronously, and the thermodetector and the plate shape meter detect the surface temperature and the shape of the plate in real time, so that point-to-point accurate heat compensation of a small coil in the heating process is realized, the phenomenon of overlarge local temperature difference caused by uneven surface shape of the plate such as poor plate shape, medium wave and plate shape change in the heating process is reduced, the steel plate is accurately and uniformly heated before rolling, ideal temperature distribution is achieved, the heating requirements of the plate in different rolling stages are realized, and the rolling quality is improved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a heating device for a plate rolling process comprises a movable induction coil group for integral heating, a crawler-type induction coil group for heat compensation, a first temperature measuring instrument, a second temperature measuring instrument and a plate type instrument, wherein the movable induction coil group comprises an upper integral induction coil, a lower integral induction coil, a positioning pillar, a ball screw, an upper connecting slide block, a lower connecting slide block and a motor; the crawler-type induction coil assembly comprises a transmission box, a telescopic small coil, a chain plate, a temperature measuring instrument, a plate shape instrument, a chain wheel and a guide wheel, wherein the transmission box is used as a driving element, the chain plate is supported and driven by the chain wheel and the guide wheel, and the temperature measuring instrument, the plate shape instrument and the telescopic small coil are all arranged on the chain plate and are equal in number; the telescopic small coil comprises a small coil, a small coil screw rod, a connecting slide block, a coupler and a coil motor, wherein the small coil is connected with the small coil screw rod through the connecting slide block, and the small coil screw rod is connected with the coil motor through the coupler; a first temperature measuring instrument is arranged in front of the movable induction coil group and feeds measured temperature back to a first processor, and the first processor controls the motor to rotate according to temperature data; the crawler-type induction coil group is characterized in that a second temperature measuring instrument and a plate type instrument are arranged in front of the crawler-type induction coil group, the second temperature measuring instrument and the plate type instrument feed measured data back to a second processor, the second processor controls the rotation of a coil motor according to the data so as to preliminarily adjust the distance between the small coil and the plate, the temperature measuring instrument and the plate type instrument in the crawler-type induction coil group measure the temperature and the shape of the plate in real time and transmit the data to the second processor, and the second processor controls a coil motor on the telescopic small coil according to the transmitted data so as to accurately control the distance between the small coil and the plate.
Preferably, the axis of the positioning support is parallel to the axis of the ball screw, the upper end and the lower end of the positioning support are respectively connected with the base and the connecting plate, the base is fixed on the movable induction coil base through bolts, and the upper connecting slide block and the lower connecting slide block are coaxially connected with the positioning support.
Preferably, the screw thread on the upper part of the ball screw is opposite to the screw thread on the lower part of the ball screw in rotation direction, and the upper integral induction coil and the lower integral induction coil can synchronously move in opposite directions at the same time under the driving of the motor, so that the distance between the upper integral induction coil and the plate is changed.
Preferably, the crawler-type induction coil group is driven by the transmission case, and in the heat supplementing process, the moving speed and the moving direction of the crawler-type induction coil group are the same as those of the plates, so that the small coils and the plates are kept relatively static, and the moving plates are accurately heated.
Preferably, the axes of the sprocket and the guide wheel are parallel, and are perpendicular to the axis of the small telescopic coil.
Preferably, the whole height of the movable induction coil group is changed by adjusting the height of the movable induction coil base, so that the distance from the upper whole induction coil to the upper surface of the plate is equal to the distance from the lower whole induction coil to the lower surface of the plate, and the heating requirements of the plates with different thicknesses are met.
Preferably, the upper integral induction coil and the lower integral induction coil are both of a zigzag surrounding structure, and currents in opposite directions are introduced to concentrate magnetic flux in the X direction.
A heating method based on the plate rolling process heating device comprises the following steps:
firstly, before rolling begins, inputting the target plate shape of the previous pass and the rolling temperature of the previous pass into a control system, and setting the initial heights of an integral coil and a small coil to be 10mm and the heating height to be 2-4 mm; step two, starting rolling, transmitting the measured plate temperature to a first processor by a first temperature measuring instrument, controlling the height of an integral coil to a heating height if the rolling temperature Tb-plate temperature Ta is greater than 50 ℃, heating the plate temperature to the rolling temperature after the integral coil is electrified, and carrying out the next step if Tb-Ta is less than 50 ℃; thirdly, the initially heated plate passes through a second temperature measuring instrument and a plate shape instrument, the second temperature measuring instrument and the plate shape instrument transmit the measured temperature and the plate shape to a second processor, the second processor compares Ta with Tb, if Ta is less than Tb, the height of the small coil is adjusted to the heating height, the small coil is electrified, the low-temperature part is accurately heated, and after the rolling temperature is reached, the power supply of the small coil is disconnected and the small coil is recovered to the initial height; if Ta is more than or equal to Tb, keeping the height of the small coil at the corresponding position as the initial height; fourthly, in the rolling process, a temperature measuring instrument and a plate shape instrument on the crawler-type induction coil set measure the temperature and the plate shape of the corresponding part of the plate in real time, when the Ta < Tb of the corresponding part, the height of the small coil is adjusted to the heating height, the small coil is electrified, and after the rolling temperature is reached, the power supply of the small coil is disconnected and the small coil is contracted to the initial height; when the corresponding position Ta is more than or equal to Tb, the height of the corresponding small coil is kept as the initial height until the rolling of the pass is finished.
Compared with the prior art, the invention has the following advantages:
1) the invention adopts a mode of primary heating and heat supplementing twice heating, and utilizes the conveyor belt to drive the plate to move at a constant speed on a production line, so as to realize uniform heating and ensure that the plate integrally reaches the optimal rolling temperature;
2) according to the invention, the temperature of the plate is fed back by using the temperature measuring instrument, and the positions of the upper coil and the lower coil of the movable induction coil group are adjusted to reach a proper heating interval, so that the temperature of the plate after primary heating is close to the optimal rolling temperature;
3) according to the invention, the crawler-type induction coil group and the plate synchronously move in the same direction, so that the telescopic small coil and the plate are relatively static, and the problem that the plate cannot be accurately heated in the moving process is effectively solved;
4) according to the invention, the temperature and the shape of the plate are detected in real time in the heating process, so that the phenomenon of overlarge local heating temperature difference caused by plate shape change or uneven surface shape of the plate in the heating process is effectively solved, the steel plate is accurately and uniformly heated before rolling, ideal temperature distribution is achieved, the heating requirements of the plate in different rolling stages are met, and the rolling quality is improved.
Drawings
FIG. 1 is a schematic diagram of the overall mechanism of the apparatus of the present invention;
FIG. 2 is a schematic view of an integral induction coil assembly of the apparatus of the present invention;
FIG. 3 is a schematic diagram of the integral induction coil of the apparatus of the present invention;
FIG. 4 is a schematic view of a track type induction coil assembly of the apparatus of the present invention;
FIG. 5 is a schematic view of the internal structure of the small telescopic coil of the device of the present invention;
fig. 6 is a flow chart of the operation of the apparatus of the present invention.
Reference numerals:
1. the production line comprises a production line base, 2, a transmission shaft, 3, a plate, 4, a first temperature measuring instrument, 5, a lower integral induction coil, 6, an upper integral induction coil, 7, a bearing support, 8, a connecting plate, 9, a second temperature measuring instrument, 10, a plate type instrument, 11, a transmission case, 12, a crawler type induction coil group, 13, a positioning support column, 14, a ball screw, 15, an upper connecting slide block, 16, a lower connecting slide block, 17, a bolt, 18, a base, 19, a ball screw support, 20, a motor support, 21, a movable induction coil base, 22, a motor, 23, a telescopic small coil, 24, a chain plate, 25, a plate type instrument, 26, a temperature measuring instrument, 27, a chain wheel, 28, a guide wheel, 29, a small coil, 30, a small coil screw rod, 31, a connecting slide block, 32, a coupling, 33 and a coil motor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments that can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
In fig. 1, 2, 4 and 5, a heating device for a plate rolling process comprises a movable induction coil set, a crawler-type induction coil set 12, a first temperature measuring instrument 4, a second temperature measuring instrument 9, a plate shape instrument 10 and a conveyor belt, and the plate 3 is heated and supplemented primarily by an integral induction coil and the crawler-type induction coil set, so that the plate 3 integrally reaches the optimal rolling temperature. The first temperature detector 4 is connected to a first processor and the second temperature detector 9 and the plate gauge 10 are connected to a second processor. The conveyer belt includes production line base 1 and transmission shaft 2, and panel 3 is placed on transmission shaft 2, makes panel 3 move forward through the rotation of transmission shaft 2. The movable induction coil group comprises a lower integral induction coil 5, an upper integral induction coil 6, a bearing end cover 7, a connecting plate 8, a positioning pillar 13, a ball screw 14, an upper connecting slide block 15, a lower connecting slide block 16, a bolt 17, a base 18, a ball screw support 19, a motor support 20 and a movable induction coil base 21, wherein the upper integral induction coil 6 and the lower integral induction coil 5 are connected with the ball screw 14 through the upper connecting slide block 15 and the lower connecting slide block 16; a motor 22 controlled by the first processor and mounted on the base 18 by a motor mount 20; the upper end surface and the lower end surface of the ball screw 14 are respectively connected with the bearing end cover 7 and the ball screw support 19; the positioning support 13 is parallel to the ball screw 14, the upper end and the lower end of the positioning support are connected to the base 18 and the connecting plate 8, and the base 18 is fixed on the movable induction coil base 21 through a bolt 17.
A first temperature measuring instrument 4 is arranged in front of the movable induction coil group, the first temperature measuring instrument 4 is connected with a first processor, and the first processor controls the motor 22 to rotate so as to control the positions of the upper coil and the lower coil. The upper and lower integral induction coils of the movable induction coil set are connected with a ball screw 14 through a sliding block, the ball screw 14 is divided into an upper part and a lower part, the thread turning directions of the two parts are opposite, the upper integral induction coil 6 and the lower integral induction coil 5 synchronously move along opposite directions under the driving of a motor 22, so that the distance between the upper integral induction coil and the plate 3 is changed, and the central axis of the ball screw 14 is vertical to the central axis of the motor 22 and is driven by a bevel gear.
The movable induction coil group can also adjust the overall height of the movable induction coil group by changing the height of the movable induction coil base 21, so that the middle of the ball screw 14 faces the middle position of the plate 3 in the height direction, and the distance from the upper surface of the plate 3 to the upper surface of the upper integral induction coil 6 is kept equal to the distance from the lower integral induction coil 5 to the lower surface of the plate 3, so that the plates with different thicknesses can be uniformly heated.
The crawler-type induction coil group 12 comprises a transmission case 11, a telescopic small coil 23, a chain plate 24 for mounting the telescopic small coil 23, a temperature measuring instrument 26, a plate type instrument 25, a chain wheel 27 and a guide wheel 28; the transmission case 11 is used for driving the crawler-type induction coil assembly, and each small telescopic coil 23 is independently arranged on a chain plate; the telescopic small coil 23 comprises a small coil 29, a small coil screw rod 30, a connecting slide block 31, a coupler 32 and a coil motor 33; the small coils 23 are connected with a small coil screw rod 30 through a connecting slide block 31, the small coil screw rod 30 is connected with a coil motor 33 through a coupler 32, and the coil motors 33 in the telescopic small coils 23 are mutually independent; the connecting slide block 31 is provided with two rectangular grooves which are matched with bosses on the inner wall of the telescopic small coil cylinder to form guiding constraint and limit the connecting slide block 31 to generate circumferential motion.
The second temperature measuring instrument 9 and the plate type instrument 10 are arranged in front of the crawler-type induction coil group 12, the second temperature measuring instrument 9 and the plate type instrument 10 feed measured data back to the second processor, and the second processor controls the coil motor 33 to rotate according to the returned data so as to preliminarily adjust the distance between the small coil 29 and the plate 3. After the preliminary distance adjustment is completed, the sheet 3 enters a heat-replenishing stage. In the heat supplementing process, the temperature measuring instrument 26 and the plate type instrument 25 on the crawler-type induction coil group 12 measure the temperature and the shape of the plate 3 in real time and transmit data to the second processor, and the second processor controls the coil motor 33 on the telescopic small coil 23 according to the transmitted data, so that the distance between the small coil 29 and the plate 3 is controlled. In addition, the crawler-type induction coil 12 group is composed of a plurality of groups of telescopic small coils 23, 10 telescopic small coils 23 with equal intervals are distributed on each group of telescopic small coils 23, a small coil 29 in each telescopic small coil 23 is connected with an independent coil motor 33 through a connecting slide block 31 and a small coil screw rod 30, and the distance between the small coil 23 and the plate 3 is adjusted through the rotation of the coil motor 33.
The crawler-type induction coil group 12 is driven by the transmission case 11, and the moving speed and direction of the crawler-type induction coil group are the same as those of the plate 3 in the heat supplementing process, so that the small coil 29 and the plate are kept relatively static, and the plate 3 in motion is precisely heated.
As shown in fig. 1, 2, and 3: the upper and lower integral induction coils of the movable induction coil group are of a circular surrounding structure, and current in opposite directions is introduced, so that magnetic flux can be concentrated in the X direction of the coils, and the plate 3 is driven by the conveyor belt to move at a constant speed, so that the plate 3 is uniformly heated; the distance between the upper and lower integrated coils and the plate 3 is adjusted in real time through data measured by the first temperature measuring 4 instrument in the heating process, and the relation between the actually measured temperature Ta and the optimal rolling temperature Tb is compared by the first processor in real time. If Tb-Ta is more than 50 ℃, the first processor controls the motor 22 on the movable coil group to rotate and adjusts the heating distance between the upper integral induction coil and the lower integral induction coil and the plate 3 to be 2-4 mm; if Tb-Ta is less than 50 ℃, the plate 3 is not heated here, and the next step of heat supplement is directly carried out.
In the process of heat compensation as shown in fig. 4 and 5, the temperature measuring instrument 26 and the plate profile instrument 25 on the crawler-type induction coil set detect the temperature and the shape of the plate 3 in real time, if the heating temperature reaches the optimal rolling temperature, the small coil 29 is powered off, and the second processor controls the coil motor 33 to rotate and withdraw the small coil 29 to a position 10mm away from the plate 3; if the temperature of the plate is reduced to be lower than the optimal rolling temperature when the plate passes through the crawler-type induction coil group 12, the small coil 29 is electrified, the second processor controls the coil motor 33 to rotate, the small coil 29 is pushed out to a heating height of 2-4mm away from the plate 3 to be heated until the optimal rolling temperature is reached, and the second processor automatically cuts off the power supply of the small coil 29 and controls the coil motor 33 to rotate to withdraw the small coil 29 to an initial height of 10mm away from the plate.
In the working flow chart of the device of the invention shown in fig. 5, a heating device for a plate rolling process comprises the following steps:
in the first step S1, before rolling, the target plate shape of the previous pass and the rolling temperature of the previous pass are input into a control system, the initial height of the whole coil is set to be 10mm, the speed of the crawler-type induction coil group 12 is set to be 0.5-0.8m/min of the moving speed of the plate 3, the initial height of the small coil 29 is 10mm, and the heating heights of the small coil 29 and the whole coil are 2-4 mm.
Step S2, when rolling starts, the plate 3 passes through the first temperature measuring instrument 4, the first temperature measuring instrument 4 transmits the measured temperature to the first processor, and the processor controls the whole coil to be electrified, adjusts the height of the whole coil to be heated to the heating height and heats the plate 3 to the rolling temperature according to the relation between the temperature Ta of the plate 3 and the rolling temperature Tb if Tb-Ta is greater than 50 ℃; if Tb-Ta is <50 ℃, the next step is carried out.
Step S3, the plate 3 after initial heating passes through the second temperature measuring instrument 9 and the plate shape instrument 10, the second temperature measuring instrument 9 and the plate shape instrument 10 transmit the measured temperature and the plate shape of the plate 3 to the second processor, the second processor compares the temperature of the plate 3 with the rolling temperature, if the temperature of the plate 3 is lower than the rolling temperature, the second processor compares the plate shape of the plate 3 with the target plate shape, adjusts the height of the small coil 29 to the heating height and enables the small coil 29 to be electrified, the part lower than the rolling temperature is precisely heated, after the rolling temperature is reached, the power supply of the small coil 29 is disconnected, and the small coil 29 is recovered to the initial height; if the plate temperature is higher than the rolling temperature, the height of the small coil 29 at the corresponding portion is maintained as the initial height.
A fourth step S4, in the rolling process, the temperature measuring instrument 26 and the plate shape instrument 25 on the crawler-type induction coil group 12 measure the temperature and the plate shape of the corresponding part of the plate 3 in real time, when the temperature of the corresponding part is lower than the rolling temperature, the height of the small coil 29 is adjusted to the heating height, the small coil 29 is powered on, the low-temperature part is heated to the rolling temperature, the power supply of the small coil 29 is disconnected after the rolling temperature is reached, and the small coil 29 is recovered to the initial height; when the corresponding portion is higher than or equal to the rolling temperature, the small coil 29 is kept in the deenergized state and the height is the initial height until the rolling of this pass is finished.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other ways. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. As a result of the observation: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Claims (8)
1. The utility model provides a panel rolling process heating device, its is including the portable induction coil group that is used for whole heating, the crawler-type induction coil group that is used for the concurrent heating, first thermoscope, second thermoscope and plate type appearance, its characterized in that:
the movable induction coil group comprises an upper integral induction coil, a lower integral induction coil, a positioning pillar, a ball screw, an upper connecting slide block, a lower connecting slide block and a motor, wherein the upper integral induction coil and the lower integral induction coil are respectively connected with the ball screw through the upper connecting slide block and the lower connecting slide block;
the crawler-type induction coil assembly comprises a transmission box, a telescopic small coil, a chain plate, a temperature measuring instrument, a plate shape instrument, a chain wheel and a guide wheel, wherein the transmission box is used as a driving element, the chain plate is supported and driven by the chain wheel and the guide wheel, and the temperature measuring instrument, the plate shape instrument and the telescopic small coil are all arranged on the chain plate and are equal in number;
the telescopic small coil comprises a small coil, a small coil screw rod, a connecting slide block, a coupler and a coil motor, wherein the small coil is connected with the small coil screw rod through the connecting slide block, and the small coil screw rod is connected with the coil motor through the coupler;
a first temperature measuring instrument is arranged in front of the movable induction coil group and feeds measured temperature back to a first processor, and the first processor controls the motor to rotate according to temperature data;
the crawler-type induction coil group is characterized in that a second temperature measuring instrument and a plate type instrument are arranged in front of the crawler-type induction coil group, the second temperature measuring instrument and the plate type instrument feed measured data back to a second processor, the second processor controls the rotation of a coil motor according to the data so as to preliminarily adjust the distance between the small coil and the plate, the temperature measuring instrument and the plate type instrument in the crawler-type induction coil group measure the temperature and the shape of the plate in real time and transmit the data to the second processor, and the second processor controls a coil motor on the telescopic small coil according to the transmitted data so as to accurately control the distance between the small coil and the plate.
2. The plate rolling process heating apparatus of claim 1, wherein: the axis of the positioning support is parallel to the axis of the ball screw, the upper end and the lower end of the positioning support are respectively connected with the base and the connecting plate, the base is fixed on the movable induction coil base through bolts, and the upper connecting slide block and the lower connecting slide block are coaxially connected with the positioning support.
3. The plate rolling process heating apparatus of claim 2, wherein: the screw thread on the upper portion of the ball screw is opposite to the screw thread on the lower portion of the ball screw in rotation direction, and the upper integral induction coil and the lower integral induction coil can synchronously move in opposite directions under the driving of the motor, so that the distance between the upper integral induction coil and the plate is changed.
4. The plate rolling process heating apparatus of claim 1, wherein: the crawler-type induction coil group is driven by the transmission case, and in the concurrent heating process, its velocity of motion and direction are the same with panel, make little coil and panel keep relative still, carry out accurate heating to the panel in the motion.
5. The plate rolling process heating apparatus of claim 4, wherein: the axes of the chain wheel and the guide wheel are parallel and are both vertical to the axis of the small telescopic coil.
6. The plate rolling process heating apparatus of claim 4, wherein: the whole height of the movable induction coil group is changed by adjusting the height of the movable induction coil base, so that the distance from the upper surface of the plate to the upper surface of the plate is equal to the distance from the lower surface of the plate to the lower surface of the plate by the upper whole induction coil, and the heating requirements of plates with different thicknesses are met.
7. The plate rolling process heating apparatus of claim 4, wherein: the upper integral induction coil and the lower integral induction coil are of a circular surrounding structure, and currents in opposite directions are led in, so that magnetic flux is concentrated in the X direction.
8. A heating method based on the heating apparatus for a sheet rolling process according to any one of claims 1 to 7, characterized in that: which comprises the following steps:
step S1, before rolling, inputting the target plate shape of the previous pass and the rolling temperature of the previous pass into a control system, and setting the initial heights of the whole coil and the small coil to be 10mm and the heating height to be 2-4 mm;
s2, starting rolling, transmitting the measured plate temperature to a first processor by a first temperature measuring instrument, controlling the height of the whole coil to a heating height if the rolling temperature Tb-plate temperature Ta is greater than 50 ℃, heating the plate temperature to the rolling temperature after the whole coil is electrified, and performing the next step if the difference between the rolling temperature and the plate temperature Tb-Ta is less than 50 ℃;
s3, the board after initial heating passes through a second temperature measuring instrument and a board shape instrument, the second temperature measuring instrument and the board shape instrument transmit the measured temperature and the board shape to a second processor, the second processor compares the board temperature Ta with the rolling temperature Tb, if the board temperature Ta is less than the rolling temperature Tb, the height of the small coil is adjusted to the heating height, the small coil is electrified, the low-temperature part is precisely heated, and after the rolling temperature is reached, the power supply of the small coil is disconnected and the small coil is recovered to the initial height; if the temperature Ta of the plate is more than or equal to the rolling temperature Tb, keeping the height of the small coil at the corresponding position as the initial height;
step S4, in the rolling process, the temperature measuring instrument and the plate shape instrument on the crawler-type induction coil set measure the temperature and the plate shape of the corresponding part of the plate in real time, when the temperature Ta of the plate at the corresponding part is less than the rolling temperature Tb, the height of the small coil is adjusted to the heating height, the small coil is electrified, and after the rolling temperature is reached, the power supply of the small coil is disconnected, and the small coil is contracted to the initial height; when the corresponding position Ta is more than or equal to Tb, the height of the corresponding small coil is kept as the initial height until the rolling of the pass is finished.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113239594A (en) * | 2021-05-21 | 2021-08-10 | 燕山大学 | Method for improving welding quality of metal pipe |
| CN115213243A (en) * | 2022-07-21 | 2022-10-21 | 辽宁科技大学 | Steel billet heating device and method |
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| CN113239594A (en) * | 2021-05-21 | 2021-08-10 | 燕山大学 | Method for improving welding quality of metal pipe |
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Effective date of registration: 20221026 Address after: No. 106, Boling East Road, Shenzhou Economic Development Zone, Hengshui, Hebei 052800 Patentee after: SHENZHEN ENGINEERING PLASTIC CO.,LTD. Address before: 066004 No. 438 west section of Hebei Avenue, seaport District, Hebei, Qinhuangdao Patentee before: Yanshan University |