Dynamic online compensation structure for thermal deformation error of hot rolling roller

Abstract

The application discloses a hot deformation error online compensation structure of a hot rolling roller, which comprises copper pipe positioning holes and notches in communication with the copper pipe positioning holes on a magnetic conducting block, each magnetic conducting block is sleeved on a copper pipe, and the notches on each magnetic conducting block are consistent in direction; the hot deformation error online compensation structure further comprises a copper pipe micro-deformation forced adjuster for realizing local position adjustment of the copper pipe, the copper pipe micro-deformation forced adjuster comprises left and right servo electric push rods arranged at left and right ends of a moving beam, clamping heads are arranged on front and back sides of end portions of telescopic rods of the left and right servo electric push rods, respectively, a clamping head at the end portion of the telescopic rod of the left servo electric push rod is clamped in a positioning groove of a magnetic conducting block on a left side of a left side section copper pipe, and a clamping head at the end portion of the telescopic rod of the right servo electric push rod is clamped in a positioning groove of a magnetic conducting block on a right side of a right side section copper pipe. The application improves the roller surface shape precision of the hot rolling roller under a hot working state.

Description

[0001] This application is a divisional application of Chinese invention patent application filed on April 26, 2024, with application number 202410508305.7 and invention title "A roller surface temperature heating compensation device and compensation method for an electrode roller". Technical Field

[0002] This invention relates to the field of rolling mill technology, specifically to a heating compensation device and method for the surface temperature of an electrode roll, and further to a dynamic online compensation structure for the thermal deformation error of a hot rolling roll. Background Technology

[0003] Electrode rolls are rolls used for rolling foil sheets for lithium-ion battery electrodes. Rolling is a hot-rolling process, therefore electrode rolls are a type of hot-rolling roll (also called hot rolls), with operating temperatures exceeding 120°C. Existing hot work roll structures include a cylindrical roll body for rolling the foil sheet and shaft ends connected to both ends of the cylindrical roll body. Hot rolls are typically used in pairs and are rotatably mounted on the rolling mill via their shaft ends and bearing components connecting the shaft ends. To maintain the rolling temperature of the hot rolls, a central heating hole is axially located at the center axis of the hot roll, and hot oil is introduced into the central heating hole during operation.

[0004] However, existing hot rollers still have the following problems when in use:

[0005] Because hot rollers operate at high temperatures, but heat dissipation is uneven, with more heat typically lost at both ends, this results in a slight (several micrometers) uneven thermal deformation error on the outer circumference of the cylindrical roller. The characteristic of this error is that the outer diameter of the middle section of the cylindrical roller is larger than that of the ends, forming an uneven shape. Figure 7 The drum-shaped curve error shown (the drum-shaped curve error of the cylindrical roller is relatively small in the middle part of the roller surface, so the drum-shaped error of the cylindrical roller can be regarded as an approximate trapezoidal error) will seriously affect the uniformity of the foil rolling thickness. Summary of the Invention

[0006] To address the aforementioned problems, this invention proposes a heating compensation device and method for the surface temperature of electrode rolls, aiming to improve the surface shape accuracy of electrode rolls (which are used as hot rolling rolls) under hot working conditions, thereby improving the uniformity of foil rolling thickness. The specific technical solution is as follows:

[0007] A roller surface temperature heating compensation device for an electrode roll includes a base, a movable beam movably disposed relative to the base, and a magnetic induction heating device disposed on the movable beam for heating and compensating the temperature of the roller surface. The magnetic induction heating device includes a copper tube and a magnetic conductor assembly disposed around the copper tube. The magnetic conductor assembly includes a plurality of magnetic conductor blocks connected sequentially adjacent to each other. Each magnetic conductor block has a copper tube positioning hole, and each magnetic conductor block is sleeved on the copper tube through the copper tube positioning hole. Each magnetic conductor block also has a slot communicating with the copper tube positioning hole, and the slots on each magnetic conductor block face the same direction. A telescopic moving mechanism for adjusting the relative distance between the movable beam and the base is provided between the base and the movable beam.

[0008] Preferably, the telescopic movement mechanism is a servo electric cylinder, the housing of which is fixed to the base, and the telescopic rod of which is connected to the moving beam.

[0009] Preferably, the movable beam is provided with a number of guide columns, and the base is provided with a number of guide holes. The movable beam is movably disposed on the base through the sliding connection between the guide columns and the guide holes.

[0010] Preferably, the copper tube is a rectangular copper tube.

[0011] Preferably, the magnetic block is a non-conductive ferrite.

[0012] Preferably, the hot rolling roll can be a roll with hot oil circulating inside, or a roll without an internal heating source.

[0013] In this invention, the copper tube is arranged in the left-right direction, the magnetic block is provided with positioning grooves on the front and rear sides respectively, the moving beam is provided with a pair of connecting arms, and the connecting arms are provided with clamps on the front and rear sides respectively, and the clamps are engaged in the positioning grooves.

[0014] Preferably, the copper tube includes a middle section copper tube and a left section copper tube and a right section copper tube integrally connected to the left and right ends of the middle section copper tube, respectively; the roll surface of the hot rolling roll is composed of a left section roll surface, a middle section roll surface and a right section roll surface; the magnetic induction heating device is provided with an online compensation structure for roll surface thermal deformation error to enhance the magnetic induction intensity of the left and right sections of the roll surface and realize thermal deformation error compensation of the left and right sides of the roll surface.

[0015] As one of the preferred solutions for the online compensation structure for roller surface thermal deformation error, the online compensation structure for roller surface thermal deformation error is a quantitative online compensation structure. The quantitative online compensation structure includes air gap grooves respectively disposed on the front and rear sides of the inner surface of the copper tube positioning hole of the magnetic block. The depth dimension of the air gap groove of the magnetic block is set according to the following rules: the depth dimension of the air gap groove on each magnetic block located on the middle section of the copper tube is the same; the depth dimension of the air gap groove on each magnetic block located on the left side of the copper tube is based on the depth dimension of the air gap groove on each magnetic block located on the middle section of the copper tube and decreases sequentially from right to left; the depth dimension of the air gap groove on each magnetic block located on the right side of the copper tube is based on the depth dimension of the air gap groove on each magnetic block located on the middle section of the copper tube and decreases sequentially from left to right.

[0016] Preferably, the air gap can be filled with high-temperature resistant adhesive.

[0017] By gradually varying the depth of the air gap grooves on each of the aforementioned magnetic blocks, the magnetic induction intensity at both ends of the roll is increased, thereby raising the magnetic induction heating temperature at that location. This causes the previously low roll surface temperature, which was caused by significant heat loss, to rise, thus achieving online quantitative compensation for thermal deformation errors at both ends of the roll surface.

[0018] Preferably, the specific parameters for the gradual setting of the air gap groove depth on each magnetic block can be obtained through experiments.

[0019] As a second preferred embodiment of the online compensation structure for roller surface thermal deformation error, the online compensation structure for roller surface thermal deformation error is a dynamic online compensation structure. The dynamic online compensation structure includes a copper tube micro-deformation forced adjuster for realizing local position adjustment of the copper tube. The copper tube micro-deformation forced adjuster includes a left servo electric push rod and a right servo electric push rod located at the left and right ends of the moving beam. The telescopic rod ends of the left and right servo electric push rods are respectively provided with locking heads on their front and rear sides. The locking head at the telescopic rod end of the left servo electric push rod engages in the positioning groove of a magnetic block located on the left side of the left section of the copper tube, and the locking head at the telescopic rod end of the right servo electric push rod engages in the positioning groove of a magnetic block located on the right side of the right section of the copper tube.

[0020] By setting up a copper tube micro-deformation forced adjuster, online dynamic compensation for thermal deformation errors on both sides of the roller surface was achieved.

[0021] In this invention, the pair of connecting arms includes a left connecting arm and a right connecting arm. The locking head on the left connecting arm is engaged in a positioning groove of a magnetic block located at the connection point between the middle section of the copper tube and the left section of the copper tube. The locking head on the right connecting arm is engaged in a positioning groove of a magnetic block located at the connection point between the middle section of the copper tube and the right section of the copper tube.

[0022] As a further improvement of the present invention, the copper tube micro-deformation forced adjuster also includes an intermediate servo electric push rod disposed in the middle part of the moving beam. The front and rear sides of the telescopic rod end of the intermediate servo electric push rod are respectively provided with clamps. The clamps at the telescopic rod end of the intermediate servo electric push rod are engaged in the positioning groove of a magnetic block located in the middle position on the intermediate section of the copper tube.

[0023] As a further improvement of the present invention, considering that the temperature change in the middle part of the roller surface is relatively small, while the temperature change in the left and right sides of the roller surface is relatively large due to the influence of the external environment, a first interpolation compensation servo electric push rod can be set on the moving beam at the position between the left servo electric push rod and the left connecting arm, and a second interpolation compensation servo electric push rod can be set on the moving beam at the position between the right connecting arm and the right servo electric push rod. The first interpolation compensation servo electric push rod has locking heads on both the front and rear sides of its telescopic rod end, and these locking heads engage with a positioning groove of a magnetic block on the copper tube corresponding to the telescopic rod position of the first interpolation compensation servo electric push rod. Similarly, the second interpolation compensation servo electric push rod has locking heads on both the front and rear sides of its telescopic rod end, and these locking heads engage with a positioning groove of a magnetic block on the copper tube corresponding to the telescopic rod position of the second interpolation compensation servo electric push rod.

[0024] By employing interpolation-compensated servo electric actuators, the micro-deformation at both ends of the copper tube can be adjusted more precisely, forming a curve compensation for the micro-deformation of the copper tube. This further improves the adaptability and accuracy of the roller surface temperature heating compensation, thereby further improving the roller surface shape accuracy of the hot rolling roll under hot working conditions, which is beneficial to further improving the uniformity of foil rolling thickness.

[0025] Preferably, each connecting arm and the telescopic rod of each servo electric push rod are further fixed to the magnetic block by high-temperature resistant adhesive.

[0026] The present invention provides a heating compensation device for the surface temperature of an electrode roll, which further includes a bracket for mounting on a rolling mill, the base being fixed on the bracket; the copper tube of the magnetic induction heating device is arranged close to the surface of the hot rolling roll and along the axial direction of the surface of the hot rolling roll, the left, middle and right sections of the copper tube of the magnetic induction heating device being close to the left, middle and right sections of the surface of the hot rolling roll respectively; at least three infrared temperature sensors are also provided on the bracket, the infrared temperature measuring heads of the three infrared temperature sensors pointing respectively to the left, middle and right sections of the surface of the hot rolling roll.

[0027] To enhance the magnetic induction heating effect of the magnetic induction heating device, a further improvement is proposed: the copper tube is a U-shaped tube containing a pair of copper tubes, and a pair of copper tube positioning holes are correspondingly opened on the magnetic guide block. Each magnetic guide block is correspondingly sleeved on the pair of copper tubes of the U-shaped tube through the pair of copper tube positioning holes, and a pair of slots correspondingly provided on the magnetic guide block that are connected to the pair of copper tube positioning holes.

[0028] By employing a U-shaped tube containing a pair of copper tubes, the speed of magnetic induction heating is greatly improved.

[0029] In this invention, when the online compensation structure for roll surface thermal deformation error adopts a quantitative online compensation structure, the copper tube is generally parallel to the central axis of the hot rolling roll surface. When the online compensation structure for roll surface thermal deformation error adopts a dynamic online compensation structure, the middle section of the copper tube is parallel to the central axis of the hot rolling roll surface, while the angle between the left and right sections of the copper tube can be adjusted by a copper tube micro-deformation forced adjuster. Considering the large heat loss at both ends of the roll, the angle between the left and right sections of the copper tube is adjusted accordingly using the left and right servo electric push rods, so that the closer the copper tube is to the left or right end of the roll, the closer it is to the roll surface. This effectively enhances the magnetic induction intensity of the heat-easily dissipated parts of the roll, thereby increasing the roll surface temperature of the heat-easily dissipated parts of the roll, thus achieving good temperature compensation.

[0030] Preferably, at least three laser ranging sensors can also be provided on the bracket, with the laser ranging heads of the three laser ranging sensors pointing respectively to the left section roll surface, the middle section roll surface and the right section roll surface of the hot rolling roll.

[0031] Preferably, a laser rangefinder sensor is provided on the bracket near each servo electric actuator to detect the distance to the magnetic block below, so as to accurately control the extension and retraction of the telescopic rod on each servo electric actuator.

[0032] Preferably, when the copper tube is a U-shaped tube containing a pair of copper tubes, a number of detection holes or detection gaps are provided on the magnetic block at the gap between the pair of copper tubes for the detection light of the infrared temperature sensor and the detection light of the laser rangefinder to pass through.

[0033] In this invention, both ends of the copper tube are connected to a magnetic induction heating power supply, and cooling water flows through the inner hole of the copper tube via a water supply cooling system.

[0034] Preferably, the magnetic induction heating power supply is a medium-frequency magnetic induction heating power supply.

[0035] In this invention, the servo electric cylinder, the left servo electric push rod, the right servo electric push rod, the middle servo electric push rod, the infrared temperature sensor, and the laser rangefinder are respectively connected to the controller.

[0036] A compensation method for a heating compensation device for the surface temperature of an electrode roller includes the following steps:

[0037] (1) Installation: Install a bracket on the rolling mill and install the roll surface temperature heating compensation device next to the roll of the rolling mill through the bracket, so that the copper tube of the roll surface temperature heating compensation device is close to the roll and arranged along the roll surface axial direction. The two ends of the copper tube are electrically connected to the induction heating power supply respectively; the inner hole of the copper tube is connected to the water cooling system.

[0038] (2) Roll heating: Turn on the mill to make the rolls rotate and turn on the magnetic induction heating power supply. The magnetic induction heating device heats the rotating rolls. The temperature of the middle section of the roll surface is detected by the infrared temperature sensor. When a certain heating time is reached and the temperature of the middle section of the roll surface no longer changes, the roll enters dynamic thermal equilibrium.

[0039] (3) Global temperature compensation of the roll: The controller compares the measured temperature of the middle section of the roll surface when the roll enters dynamic thermal equilibrium with the required working temperature of the roll. When the measured temperature is higher than the required working temperature of the roll, the controller drives the telescopic rod of the servo cylinder to move back a certain distance to increase the distance between the magnetic induction heating device and the roll surface, thereby causing the measured temperature of the middle section of the roll surface to decrease, and causing the temperature of the left and right sections of the roll surface to decrease synchronously. When the measured temperature is lower than the required working temperature of the roll, the controller drives the telescopic rod of the servo cylinder to move forward a certain distance to decrease the distance between the magnetic induction heating device and the roll surface, thereby causing the measured temperature of the middle section of the roll surface to increase, and causing the temperature of the left and right sections of the roll surface to increase synchronously, ultimately making the measured temperature of the middle section of the roll surface consistent with the required working temperature of the roll, thereby achieving global compensation of the roll surface temperature.

[0040] (4) Local temperature compensation of rolls: Based on the global compensation of the roll surface temperature, the low temperature on the left and right sections of the roll surface is increased by setting a quantitative online compensation structure or a dynamic online compensation device on the magnetic induction heating device, so that the measured temperature values ​​on the left and right sections of the roll surface tend to be consistent with the working temperature required by the roll.

[0041] Note that when using a quantitative online compensation structure for local temperature compensation of the rolls, the value of local temperature compensation of the rolls is predetermined as long as the quantitative online compensation structure is preset on the magnetic induction heating device and cannot be adjusted during use. Therefore, the gradual setting parameters of the air gap groove depth of each magnetic block in the quantitative online compensation structure need to be obtained through prior testing in order to achieve the ideal roll surface temperature heating compensation effect.

[0042] When using a dynamic online compensation structure for local temperature compensation of the roll, real-time online adjustment is achieved through a copper tube micro-deformation forced regulator. The controller dynamically adjusts the angle between the left and right sections of the copper tube based on the temperature of the roll surface on the left and right sides measured by the infrared temperature sensor, thereby achieving temperature compensation of the roll surface at both ends of the roll.

[0043] Furthermore, the amount of the arc-shaped protrusion of the intermediate section of the copper tube can be controlled by the intermediate servo electric push rod, so as to realize stepless compensation of the roll surface temperature error, thereby completely eliminating the overall drum-shaped thermal deformation error of the roll and further improving the accuracy of error compensation.

[0044] Furthermore, the first interpolation compensation servo electric actuator and the second interpolation compensation servo electric actuator can be used to more precisely control the micro-deformation of a section of copper tube at both ends, thereby achieving more accurate compensation for the temperature error of the roll surface.

[0045] The beneficial effects of this invention are:

[0046] First, the present invention provides a heating compensation device and method for heating the surface temperature of an electrode roll. By setting a magnetic induction heating device for heating the surface of the hot rolling roll on the rolling mill, and using a telescopic moving mechanism (servo electric cylinder) to adjust the distance between the copper tube and the surface of the hot rolling roll, the precise control of the surface temperature of the hot rolling roll can be achieved, ensuring that the hot rolling roll can work according to the set working temperature, thereby improving the quality of foil rolling.

[0047] Secondly, the present invention provides a roller surface temperature heating compensation device and method for an electrode roller. The magnetic induction heating device is equipped with a quantitative online compensation structure. This quantitative online compensation structure increases the magnetic induction intensity at both ends of the roller by gradually varying the depth of the air gap grooves on each magnetic block, thereby increasing the magnetic induction heating temperature at that location. This causes the roller surface temperature, which is lower due to greater heat loss, to rise, thus achieving online quantitative compensation for the thermal deformation error at both ends of the roller surface. This effectively eliminates the approximate trapezoidal error on the cylindrical roller body, thereby improving the roller surface shape accuracy of the hot rolling roller in the hot working state, and further improving the uniformity of the foil rolling thickness.

[0048] Third, the present invention provides a roller surface temperature heating compensation device and method for electrode rolls. The dynamic online compensation structure set on the magnetic induction heating device, through a specially set copper tube micro-deformation forced adjuster, can dynamically adjust the inclination of the left and right copper tube sections according to the temperature change of the roll surface, thereby optimizing the roller surface temperature compensation at both ends of the roll and improving the adaptability of the roller surface temperature heating compensation. This improves the roller surface shape accuracy of the hot rolling roll in the hot working state, which is beneficial to improving the uniformity of foil rolling thickness.

[0049] Fourth, the roller surface temperature heating compensation device and compensation method of the present invention utilizes the left servo electric push rod, the middle servo electric push rod and the right servo electric push rod on the copper tube micro-deformation forced adjustment device to achieve more accurate compensation for the cylindrical roller body drum shape error of the roll, thereby further improving the roller surface shape accuracy of the hot rolling roll in the hot working state.

[0050] Fifth, the present invention provides a roller surface temperature heating compensation device and compensation method for an electrode roller. The setting of the first interpolation compensation servo electric push rod and the second interpolation compensation servo electric push rod can realize accurate compensation for the deformation of the drum-shaped curve of a section of copper tube at both ends, thereby further improving the roller surface shape accuracy of the hot rolling roll in the hot working state. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the structure of a roller surface temperature heating compensation device for an electrode roller according to the present invention;

[0052] Figure 2 yes Figure 1 A schematic diagram of the magnetic induction heating device in the image;

[0053] Figure 3 yes Figure 2 One of the schematic diagrams of the magnetic conductive block and its assembly connection structure (left view, the copper tube in the figure is a circular copper tube, and the copper tube positioning hole of the magnetic conductive block is a circular hole);

[0054] Figure 4 yes Figure 2 The second schematic diagram of the magnetic guide block and its assembly connection structure (left view, the copper tube in the figure is a rectangular copper tube, and the copper tube positioning hole of the magnetic guide block is a rectangular hole);

[0055] Figure 5 yes Figure 2 Top view;

[0056] Figure 6 Is Figure 1 The structural diagram is a further improvement based on the previous one (with the addition of an interpolation compensation servo electric actuator);

[0057] Figure 7 This is a schematic diagram showing a slight bulging error on the cylindrical roll surface of a rolling mill under hot working conditions.

[0058] In the diagram: 1. Roll, 2. Roll surface, 3. Base, 4. Moving beam, 5. Magnetic induction heating device, 6. Copper tube, 7. Magnetic conductor assembly, 8. Magnetic block, 9. Copper tube positioning hole, 10. Groove, 11. Telescopic moving mechanism (servo cylinder), 12. Guide column, 13. Guide hole, 14. Positioning groove, 15. U-tube, 16. Chuck, 17. Middle section copper tube, 18. Left side section copper tube, 19. Right side section copper tube, 20. Left side section roll surface, 21. Middle section roll surface. 22. Right side roller surface; 23. Air gap groove; 24. High temperature resistant adhesive; 25. Left side servo electric actuator; 26. Right side servo electric actuator; 27. Left connecting arm; 28. Right connecting arm; 29. ​​Middle servo electric actuator; 30. Bracket; 31. Infrared temperature sensor; 32. Laser rangefinder; 33. Detection hole or detection gap; 34. Copper tube micro-deformation forced adjuster; 35. First interpolation compensation servo electric actuator; 36. Second interpolation compensation servo electric actuator. Detailed Implementation

[0059] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0060] Example 1:

[0061] like Figures 1 to 7The illustration shows an embodiment of a roller surface temperature heating compensation device for an electrode roller according to the present invention. It includes a base 3, a movable beam 4 movably disposed relative to the base 3, and a magnetic induction heating device 5 disposed on the movable beam 4 for temperature heating compensation of the roller surface 2 of the roller 1. The magnetic induction heating device 5 includes a copper tube 6 and a magnetic conductor assembly 7 disposed around the copper tube 6. The magnetic conductor assembly 7 includes a plurality of magnetic conductor blocks 8 connected sequentially adjacent to each other. Each magnetic conductor block 8 has a copper tube positioning hole 9, and each magnetic conductor block 8 is fitted onto the copper tube 6 through the copper tube positioning hole 9. Each magnetic conductor block 8 also has a slot 10 communicating with the copper tube positioning hole 9, and the slots 10 on each magnetic conductor block 8 face the same direction. A telescopic moving mechanism 11 is disposed between the base 3 and the movable beam 4 for adjusting the relative distance between the movable beam 4 and the base 3.

[0062] Preferably, the telescopic moving mechanism 11 is a servo electric cylinder, the housing of which is fixed to the base 3, and the telescopic rod of which is connected to the moving beam 4.

[0063] Preferably, the movable beam 4 is provided with a number of guide posts 12, and the base 3 is provided with a number of guide holes 13. The movable beam 4 is movably disposed on the base 3 through the sliding engagement connection between the guide posts 12 and the guide holes 13.

[0064] Preferably, the copper tube 6 is a rectangular copper tube.

[0065] Preferably, the magnetic block 8 is a non-conductive ferrite.

[0066] Preferably, the hot rolling roll can be a rolling roll 1 with hot oil circulating inside, or it can be a rolling roll 1 without a heating source inside.

[0067] In this embodiment, the copper tube 6 is arranged in the left-right direction, the magnetic block 8 is provided with positioning grooves 14 on the front and rear sides respectively, the moving beam 4 is provided with a pair of connecting arms 27 and 28, and the connecting arms are provided with clamps 16 on the front and rear sides respectively, and the clamps 16 are engaged in the positioning grooves 14.

[0068] Preferably, the copper tube 6 includes a middle section copper tube 17 and a left section copper tube 18 and a right section copper tube 19 integrally connected to the left and right ends of the middle section copper tube 17, respectively; the roll surface 2 of the hot rolling roll is composed of a left section roll surface 20, a middle section roll surface 21 and a right section roll surface 22; the magnetic induction heating device 5 is provided with an online compensation structure for the roll surface thermal deformation error to enhance the magnetic induction intensity of the left section roll surface 20 and the right section roll surface 22 of the hot rolling roll, so as to realize the thermal deformation error compensation of the left and right sides of the roll surface.

[0069] As one of the preferred solutions for the online compensation structure for roller surface thermal deformation error, the online compensation structure for roller surface thermal deformation error is a quantitative online compensation structure. The quantitative online compensation structure includes air gap grooves 23 respectively disposed on the front and rear sides of the inner surface of the copper tube positioning hole 9 of the magnetic guide block 8. The depth dimension of the air gap groove 23 of the magnetic guide block 8 is set according to the following rules: the depth dimension of the air gap groove 23 on each magnetic guide block 8 located on the middle section of the copper tube 17 is the same; the depth dimension of the air gap groove 23 on each magnetic guide block 8 located on the left side section of the copper tube 18 is based on the depth dimension of the air gap groove 23 on each magnetic guide block 8 located on the middle section of the copper tube 17 and decreases sequentially from right to left; the depth dimension of the air gap groove 23 on each magnetic guide block 8 located on the right side section of the copper tube 19 is based on the depth dimension of the air gap groove on each magnetic guide block located on the middle section of the copper tube and decreases sequentially from left to right.

[0070] Preferably, the air gap 23 can be filled with high-temperature resistant adhesive.

[0071] By gradually varying the depth of the air gap grooves 23 on each of the aforementioned magnetic blocks 8, the magnetic induction intensity at both ends of the roll 1 is increased, thereby increasing the magnetic induction heating temperature at that location. This causes the temperature of the roll surface 2, which is lower due to greater heat loss, to rise, thus achieving online quantitative compensation for thermal deformation errors at both ends of the roll surface 2.

[0072] Preferably, the specific parameters for the gradual setting of the depth dimension of the air gap groove 23 on each magnetic block 8 can be obtained through experiments.

[0073] As a second preferred embodiment of the online compensation structure for roller surface thermal deformation error, the online compensation structure for roller surface thermal deformation error is a dynamic online compensation structure. The dynamic online compensation structure includes a copper tube micro-deformation forced adjuster 34 for realizing local position adjustment of copper tube 6. The copper tube micro-deformation forced adjuster 34 includes a left servo electric push rod 25 and a right servo electric push rod 26 located at the left and right ends of the moving beam 4. The front and rear sides of the telescopic rod ends of the left servo electric push rod 25 and the right servo electric push rod 26 are respectively provided with clamps 16. The clamp 16 at the telescopic rod end of the left servo electric push rod 25 is engaged in the positioning groove 14 of a magnetic block 8 located on the left side of the left section of copper tube 18. The clamp 16 at the telescopic rod end of the right servo electric push rod 26 is engaged in the positioning groove 14 of a magnetic block 8 located on the right side of the right section of copper tube 19.

[0074] By setting up a copper tube micro-deformation forced adjuster 34, online dynamic compensation for thermal deformation error on the left and right sides of the roller surface 2 was achieved.

[0075] In this embodiment, the pair of connecting arms includes a left connecting arm 27 and a right connecting arm 28. The locking head 16 on the left connecting arm 27 is engaged in a positioning groove 14 of a magnetic block 8 located at the connection point between the middle section copper tube 17 and the left section copper tube 18. The locking head 16 on the right connecting arm 28 is engaged in a positioning groove 14 of a magnetic block 8 located at the connection point between the middle section copper tube 17 and the right section copper tube 19.

[0076] As a further improvement to this embodiment, considering that the temperature change in the middle part of the roller surface is relatively small, while the temperature change in the left and right sides of the roller surface is relatively large due to the influence of the external environment, a first interpolation compensation servo electric push rod 35 can be set on the moving beam 4 at the position between the left servo electric push rod 25 and the left connecting arm 27, and a second interpolation compensation servo electric push rod 36 can be set on the moving beam 4 at the position between the right connecting arm 28 and the right servo electric push rod 26; the front and rear sides of the telescopic rod end of the first interpolation compensation servo electric push rod 35 are respectively A locking head 16 is provided on the first interpolation compensation servo electric actuator 35. The locking head 16 at the telescopic rod end of the first interpolation compensation servo electric actuator 35 is engaged in a positioning groove 14 of a magnetic block 8 on the copper tube, which is located at the telescopic rod position of the first interpolation compensation servo electric actuator 35. Locking heads 16 are provided on the front and rear sides of the telescopic rod end of the second interpolation compensation servo electric actuator 36. The locking head 16 at the telescopic rod end of the second interpolation compensation servo electric actuator 36 is engaged in a positioning groove 14 of a magnetic block 8 on the copper tube, which is located at the telescopic rod position of the second interpolation compensation servo electric actuator 36.

[0077] By employing interpolation compensation servo electric push rods 35 and 36, the micro-deformation at both ends of the copper tube can be adjusted more precisely, forming a curve compensation for the micro-deformation of the copper tube. This further improves the adaptability and accuracy of the roller surface temperature heating compensation, thereby further improving the roller surface shape accuracy of the hot rolling roll in the hot working state, which is conducive to further improving the uniformity of foil rolling thickness.

[0078] As a further improvement of this embodiment, the copper tube micro-deformation forced adjuster 34 also includes an intermediate servo electric push rod 29 disposed in the middle part of the moving beam 4. The front and rear sides of the telescopic rod end of the intermediate servo electric push rod 29 are respectively provided with a locking head 16. The locking head 16 of the telescopic rod end of the intermediate servo electric push rod 29 is engaged in the positioning groove 14 of the magnetic block 8 located in the middle position on the intermediate section of the copper tube 17.

[0079] Preferably, the telescopic rods of each connecting arm 27, 28 and each of the servo electric push rods 25, 26, 29 are further fixed to the magnetic block 8 by high-temperature resistant adhesive.

[0080] The electrode roll surface temperature heating compensation device of this embodiment also includes a bracket 30 for mounting on a rolling mill, and the base 3 is fixed on the bracket 30; the copper tube 6 of the magnetic induction heating device 5 is arranged close to the roll surface 2 of the hot rolling roll and along the axial direction of the roll surface 2 of the hot rolling roll, and the left section copper tube 18, the middle section copper tube 17 and the right section copper tube 19 of the magnetic induction heating device 5 are respectively close to the left section roll surface 20, the middle section roll surface 21 and the right section roll surface 22 of the hot rolling roll; at least three infrared temperature sensors 31 are also provided on the bracket, and the infrared temperature measuring heads of the three infrared temperature sensors 31 are respectively pointed to the left section roll surface 20, the middle section roll surface 21 and the right section roll surface 22 of the hot rolling roll.

[0081] To enhance the magnetic induction heating effect of the magnetic induction heating device 5, a further improvement is made as follows: the copper tube 6 is a U-shaped tube 15 containing a pair of copper tubes, and a pair of copper tube positioning holes 9 are correspondingly opened on the magnetic guide block 8. Each magnetic guide block 8 is correspondingly sleeved on the pair of copper tubes of the U-shaped tube 15 through the pair of copper tube positioning holes 9. A pair of slots 10 are correspondingly provided on the magnetic guide block 8 that are connected to the pair of copper tube positioning holes 9.

[0082] By employing a U-shaped tube 15 containing a pair of copper tubes, the speed of magnetic induction heating is greatly improved.

[0083] In this embodiment, when the online compensation structure for the heat deformation error of the roll surface adopts a quantitative online compensation structure, the copper tube 6 is generally parallel to the central axis of the roll surface 2 of the hot rolling roll; when the online compensation structure for the heat deformation error of the roll surface adopts a dynamic online compensation structure, the middle section of the copper tube 17 in the copper tube 6 is parallel to the central axis of the roll surface 2 of the hot rolling roll, while the angle between the left section of the copper tube 18 and the right section of the copper tube 19 can be adjusted by the copper tube micro-deformation forced adjuster 34. Considering the large heat loss at both ends of the roll 1, the angle between the left section of the copper tube 18 and the right section of the copper tube 19 is adjusted accordingly using the left servo electric push rod 25 and the right servo electric push rod 26, so that the closer the copper tube is to the left or right end of the roll 1, the closer its distance is to the roll surface 2 of the roll 1. This can effectively enhance the magnetic induction intensity of the heat-easily dissipated parts of the roll 1, thereby increasing the roll surface temperature of the heat-easily dissipated parts of the roll 1, thus achieving good temperature compensation.

[0084] Preferably, at least three laser rangefinders 32 can also be provided on the bracket 30, and the laser rangefinders of the three laser rangefinders 32 are respectively pointed to the left section roll surface 20, the middle section roll surface 21 and the right section roll surface 22 of the hot rolling roll.

[0085] Preferably, a laser rangefinder 32 is provided on the bracket 30 near each servo electric push rod 25, 26, 29 to detect the distance position of the magnetic block 8 below, so as to accurately control the extension and retraction of the telescopic rod on each servo electric push rod 25, 26, 29.

[0086] Preferably, when the copper tube 6 is a U-shaped tube 15 containing a pair of copper tubes, a number of detection holes or detection gaps 33 are provided on the magnetic block 8 at the gap between the pair of copper tubes 6 for the detection light of the infrared temperature sensor 31 and the detection light of the laser rangefinder 32 to pass through.

[0087] In this embodiment, both ends of the copper tube 6 are connected to a magnetic induction heating power supply, and cooling water flows through the inner hole of the copper tube 6 through a water supply cooling system.

[0088] Preferably, the magnetic induction heating power supply is a medium-frequency magnetic induction heating power supply.

[0089] In this embodiment, the servo electric cylinder 11, the left servo electric push rod 25, the right servo electric push rod 26, the middle servo electric push rod 29, the infrared temperature sensor 31, and the laser rangefinder 32 are respectively connected to the controller.

[0090] Example 2:

[0091] A compensation method for a heating compensation device for the surface temperature of an electrode roller includes the following steps:

[0092] (1) Installation: Install bracket 30 on the rolling mill, and install the roll surface temperature heating compensation device next to the roll 1 of the rolling mill through bracket 30, so that the copper tube 6 of the roll surface temperature heating compensation device is close to the roll 1 and arranged along the axial direction of the roll surface 2 of the roll 1. The two ends of the copper tube 6 are electrically connected to the induction heating power supply respectively; the inner hole of the copper tube 6 is connected to the water cooling system.

[0093] (2) Roll heating: Turn on the mill to make the roll 1 rotate and turn on the magnetic induction heating power supply. The magnetic induction heating device 5 heats the rotating roll 1. The temperature of the middle section roll surface 21 of the roll 1 is detected by the infrared temperature sensor 31. When a certain heating time is reached and the temperature of the middle section roll surface 21 no longer changes, the roll 1 enters dynamic thermal equilibrium.

[0094] (3) Global temperature compensation of the roll: The controller compares the measured temperature value of the middle section roll surface 21 when the roll 1 enters dynamic thermal equilibrium with the required working temperature of the roll 1; when the measured temperature value is higher than the required working temperature of the roll 1, the controller drives the telescopic rod of the servo cylinder 11 to move back a certain distance to increase the distance between the magnetic induction heating device 5 and the roll surface 2 of the roll 1, thereby causing the measured temperature value of the middle section roll surface 21 of the roll to decrease, and causing the temperature of the left section roll surface 20 of the roll 1 to be lower than that of the right section roll surface 22 of the roll 1. Synchronous descent; when the measured temperature value is lower than the required working temperature of roll 1, the controller drives the telescopic rod of servo cylinder 11 to advance a certain distance to reduce the distance between magnetic induction heating device 5 and roll surface 2 of roll 1, thereby causing the measured temperature value of roll surface 21 in the middle section of roll 1 to rise, and causing the temperature of roll surface 20 in the left section of roll 1 and roll surface 22 in the right section of roll 1 to rise synchronously, ultimately making the measured temperature value of roll surface 21 in the middle section of roll 1 consistent with the required working temperature of roll 1, thereby achieving global compensation of roll surface temperature of roll 1;

[0095] (4) Local temperature compensation of rolls: Based on the global temperature compensation of the roll surface of roll 1, the low temperature on the left side roll surface 20 and the right side roll surface 22 of roll 1 is increased by the quantitative online compensation structure or dynamic online compensation device set on the magnetic induction heating device 5, so that the measured temperature values ​​on the left side roll surface 20 and the right side roll surface 22 of roll 1 are consistent with the working temperature required by roll 1.

[0096] Note that when using a quantitative online compensation structure for local temperature compensation of the roll, as long as the quantitative online compensation structure is preset on the magnetic induction heating device 5, the value of local temperature compensation of the roll is predetermined and cannot be adjusted during use. Therefore, the gradual setting parameters of the depth dimension of the air gap groove 23 of each magnetic block 8 in the quantitative online compensation structure need to be obtained through prior testing in order to achieve the ideal roll surface temperature heating compensation effect.

[0097] When using a dynamic online compensation structure for local temperature compensation of the roll, the copper tube micro-deformation forced regulator 34 performs real-time online adjustment. The controller dynamically adjusts the angles of the left section copper tube 18 and the right section copper tube 19 based on the temperature of the left section roll surface 20 and the right section roll surface 22 of the roll 1 measured by the infrared temperature sensor 31, thereby achieving temperature compensation of the roll surfaces at both ends of the roll 1.

[0098] Furthermore, the amount of the arc-shaped protrusion of the intermediate section copper tube 17 can be controlled by the intermediate servo electric push rod 29 to achieve stepless compensation of the roll surface temperature error, thereby completely eliminating the overall drum-shaped thermal deformation error of the roll 1 and further improving the accuracy of error compensation.

[0099] Furthermore, the first interpolation compensation servo electric actuator 35 and the second interpolation compensation servo electric actuator 36 can be used to more precisely control the micro-deformation of a section of copper tube at both ends, thereby achieving more accurate compensation for the temperature error of the roll surface.

[0100] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A dynamic online compensation structure for the thermal deformation error of a hot rolling roll, characterized in that, The system includes a base, a movable beam movably disposed relative to the base, and a magnetic induction heating device disposed on the movable beam for temperature compensation of the roll surface. The magnetic induction heating device includes a copper tube and a magnetic conductor assembly disposed around the copper tube. The magnetic conductor assembly includes a plurality of sequentially adjacent magnetic blocks. Each magnetic block has a copper tube positioning hole, and each magnetic block is fitted onto the copper tube through the positioning hole. Each magnetic block also has a slot communicating with the positioning hole, and the slots on each magnetic block face the same direction. The copper tube includes a middle section and a left and right section copper tubes integrally connected to the left and right ends of the middle section copper tube, respectively. The roll surface of the hot rolling roll is composed of a left section roll surface, a middle section roll surface, and a right section roll surface. The magnetic induction heating device is provided with a feature to enhance the left section roll surface of the hot rolling roll. The roll surface thermal deformation error is compensated online by increasing the magnetic induction intensity of the roll surface on the left and right sides. The roll surface thermal deformation error compensation structure is a dynamic online compensation structure. The dynamic online compensation structure includes a copper tube micro-deformation forced adjuster for local adjustment of the copper tube position. The copper tube micro-deformation forced adjuster includes a left servo electric push rod and a right servo electric push rod located at the left and right ends of the moving beam. The telescopic rod ends of the left and right servo electric push rods are respectively provided with locking heads on the front and rear sides. The locking head of the telescopic rod end of the left servo electric push rod is engaged in the positioning groove of a magnetic block located on the left side of the left section of the copper tube. The locking head of the telescopic rod end of the right servo electric push rod is engaged in the positioning groove of a magnetic block located on the right side of the right section of the copper tube. It also includes a bracket for mounting on the rolling mill, the base being fixed on the bracket; the copper tube of the magnetic induction heating device is arranged close to the roll surface of the hot rolling roll and along the axial direction of the roll surface of the hot rolling roll, the left, middle, and right sections of the copper tube of the magnetic induction heating device being close to the left, middle, and right sections of the roll surface of the hot rolling roll respectively; at least three infrared temperature sensors are also provided on the bracket, the infrared temperature measuring heads of the three infrared temperature sensors pointing respectively to the left, middle, and right sections of the roll surface of the hot rolling roll; the copper tube micro-deformation forced adjuster also includes an intermediate servo electric push rod located in the middle of the moving beam, the front and rear sides of the telescopic rod end of the intermediate servo electric push rod are respectively provided with clamps, the clamps of the telescopic rod end of the intermediate servo electric push rod engaging in the positioning groove of a magnetic block located in the middle position on the middle section of the copper tube.

2. The dynamic online compensation structure for thermal deformation error of a hot rolling roll according to claim 1, characterized in that, A telescopic moving mechanism for adjusting the relative distance between the moving beam and the base is provided between the base and the moving beam.

3. The dynamic online compensation structure for thermal deformation error of a hot rolling roll according to claim 2, characterized in that, The telescopic movement mechanism is a servo electric cylinder. The housing of the servo electric cylinder is fixed on the base, and the telescopic rod of the servo electric cylinder is connected to the moving beam.

4. The dynamic online compensation structure for thermal deformation error of a hot rolling roll according to claim 1, characterized in that, The copper tube is arranged in the left-right direction. Positioning grooves are provided on the front and rear sides of the magnetic block. A pair of connecting arms are provided on the moving beam. Clamps are provided on the front and rear sides of the connecting arms. The clamps are engaged in the positioning grooves.

5. The dynamic online compensation structure for thermal deformation error of a hot rolling roll according to claim 4, characterized in that, The pair of connecting arms includes a left connecting arm and a right connecting arm. The locking head on the left connecting arm is engaged in a positioning groove of a magnetic block located at the connection point between the middle section of the copper tube and the left section of the copper tube. The locking head on the right connecting arm is engaged in a positioning groove of a magnetic block located at the connection point between the middle section of the copper tube and the right section of the copper tube.

6. A dynamic online compensation structure for the thermal deformation error of a hot rolling roll according to any one of claims 1 to 5, characterized in that, The compensation method for the dynamic online compensation structure for the thermal deformation error of the hot rolling roll includes the following steps: (1) Installation: Install a bracket on the rolling mill and install the magnetic induction heating device next to the rolling mill roll through the bracket, so that the copper tube of the magnetic induction heating device is close to the roll and arranged along the roll surface axially. The two ends of the copper tube are electrically connected to the induction heating power supply respectively; the inner hole of the copper tube is connected to the water cooling system. (2) Roll heating: Turn on the mill to make the rolls rotate and turn on the magnetic induction heating power supply. The magnetic induction heating device heats the rotating rolls. The temperature of the middle section of the roll surface is detected by the infrared temperature sensor. When a certain heating time is reached and the temperature of the middle section of the roll surface no longer changes, the roll enters dynamic thermal equilibrium. (3) Global temperature compensation of the roll: The controller compares the measured temperature of the middle section of the roll surface when the roll enters dynamic thermal equilibrium with the required working temperature of the roll. When the measured temperature is higher than the required working temperature of the roll, the controller drives the telescopic rod of the servo cylinder to move back a certain distance to increase the distance between the magnetic induction heating device and the roll surface, thereby causing the measured temperature of the middle section of the roll surface to decrease, and causing the temperature of the left section of the roll surface to decrease synchronously with the temperature of the right section of the roll surface. When the measured temperature is lower than the required working temperature of the roll, the controller drives the telescopic rod of the servo cylinder to move forward a certain distance to decrease the distance between the magnetic induction heating device and the roll surface, thereby causing the measured temperature of the middle section of the roll surface to increase, and causing the temperature of the left section of the roll surface to increase synchronously with the temperature of the right section of the roll surface, and finally causing the measured temperature of the middle section of the roll surface to become consistent with the required working temperature of the roll, thereby achieving global compensation of the roll surface temperature. (4) Local temperature compensation of rolls: Based on the global compensation of roll surface temperature, the dynamic online compensation device set on the magnetic induction heating device is used to raise the low temperature of the left and right sections of the roll surface, so that the measured temperature values ​​of the left and right sections of the roll surface are consistent with the required working temperature of the roll.

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