Electric field device for rolling super-h-beam and method of using the same

Abstract

The application belongs to the technical field of rolling equipment, and discloses an electric field action device for rolling super-large H-shaped steel and a use method thereof, which comprises a rack, a super-large H-shaped steel arranged in the rack, a pulse current heat compensation structure, a monitoring system, etc.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of rolling equipment, in particular to an electric field device for rolling super-large H-shaped steel and a method of using the same. BACKGROUND

[0002] In the hot rolling process of super-large H-shaped steel, due to the different thicknesses of the flange and the web, the cooling speed of the thicker flange is slower than that of the thinner web, resulting in a large temperature difference between the web and the flange. Research shows that the temperature difference will cause different elongation rates of the flange and the web, thereby causing waves at the flange and web positions, which seriously affects the rolling quality. Moreover, the sample size is super-large, and defects such as coarse grains and micro-holes are prone to occur during the rolling process of the H-shaped steel. SUMMARY

[0003] The purpose of the present application is to provide an electric field device for rolling super-large H-shaped steel and a method of using the same to solve the problems existing in the prior art.

[0004] To achieve the above-mentioned purpose, the present application provides an electric field device for rolling super-large H-shaped steel, comprising:

[0005] A rack, wherein the rack is provided with super-large H-shaped steel;

[0006] A pulse current heat compensation structure, wherein the pulse current heat compensation structure is provided in multiple groups, the structure of each group of the pulse current heat compensation structure is the same, both ends of each group of the pulse current heat compensation structure are connected with the left inner wall and the right inner wall of the rack, and the multiple groups of the pulse current heat compensation structure are symmetrically arranged in parallel inside the rack through the super-large H-shaped steel;

[0007] A monitoring system, comprising a vision system and a temperature measurement system, wherein the vision system and the temperature measurement system are arranged inside the rack.

[0008] Optionally, the pulse current heat compensation structure is composed of two groups of transmission and power supply mechanisms which are the same in structure and symmetrically arranged adjacent to each other.

[0009] Optionally, the transmission and power supply mechanism comprises a lead screw transmission mechanism and a contact power supply mechanism, and the contact power supply mechanism is arranged above the lead screw transmission mechanism.

[0010] Optionally, the lead screw transmission mechanism comprises a first lead screw, a second lead screw, a first sliding support rod, a second sliding support rod, a first drive motor, a second drive motor, a first bearing seat, a second bearing seat, a first sliding block, a second sliding block, a third sliding block, a first lead screw nut, a second lead screw nut and a guide rail.

[0011] The first screw rod is symmetrically provided with a plurality of first sliding support rods on both sides, and the height of the first screw rod is the same as that of the plurality of first sliding support rods, one end of the first screw rod and the plurality of first sliding support rods is connected with a first driving motor, the other end is provided with the first bearing seat, the middle part of the first sliding support rod is provided with a first sliding block, and the first screw rod is connected with one end of the first sliding block through a first screw rod nut;

[0012] One end of the second screw rod is connected with the second driving motor through the first sliding block, the other end is fixedly connected with the second bearing seat through the third sliding block, a second screw rod nut is fixedly arranged at the connection position of the second screw rod and the third sliding block, and a plurality of second sliding support rods which are parallel to the second screw rod are symmetrically arranged on both sides of the second screw rod;

[0013] One side of the second bearing seat is fixedly connected with a second sliding block, the guide rail is fixedly connected to the inner wall of the rack, and the guide rail is slidingly connected to the second sliding block.

[0014] Optionally, the contact power-on mechanism comprises a hydraulic cylinder, a first sliding groove, a second sliding groove, a pin, a traction rod, a traction block, a fourth sliding block, a longitudinal power-on assembly and a transverse power-on assembly.

[0015] The hydraulic cylinder is fixedly arranged on one side of the third sliding block, two symmetrical first sliding grooves are rotatably connected to the bottom of the third sliding block, the longitudinal power-on assembly is arranged below the bottom of the third sliding block, the traction block is fixedly arranged on the longitudinal power-on assembly, the two symmetrical first sliding grooves are rotatably connected to the two sides of the traction block through the traction rod, and the connection positions among the third sliding block, the first sliding groove, the traction rod and the traction block are connected by pins.

[0016] The longitudinal power-on assembly is provided with a second sliding groove at the bottom, and fourth sliding blocks are slidingly connected to both ends of the bottom of the second sliding groove, and the transverse power-on assembly is arranged on one side of each fourth sliding block.

[0017] Optionally, the longitudinal power-on assembly comprises a connecting column, a buffer barrel, a spring, a first insulating shell and a roller.

[0018] One end of the connecting column is connected with the hydraulic cylinder through a piston rod, the other end is slidingly arranged in the cavity of the buffer barrel through the spring, the bottom of the cavity of the buffer barrel is fixedly connected with the spring, the bottom of the buffer barrel is fixedly connected with the first insulating shell, and the roller is rotatably connected in the first insulating shell.

[0019] Optionally, the transverse power-on assembly comprises a sliding rail, a fifth sliding block, a second insulating shell, a displacement sensor and a spring sheet.

[0020] The fourth sliding block is fixedly connected with the fourth sliding rail, and the fifth sliding block is slidably connected with the other end of the fourth sliding rail.

[0021] Optionally, the visual system comprises a first visual system and a second visual system, the first visual system comprises a plurality of first visual cameras, and the second visual system comprises a plurality of second visual cameras.

[0022] The plurality of first visual cameras are arranged at the middle portions of the inner walls of the rack, and the plurality of second visual cameras are arranged at one side of the hydraulic cylinders in the contact power-on mechanisms.

[0023] The temperature measurement system comprises a first temperature measurement system and a second temperature measurement system, the first temperature measurement system comprises a plurality of first temperature measuring instruments, and the second temperature measurement system comprises a plurality of second temperature measuring instruments.

[0024] The first temperature measuring instrument is arranged at the middle portion of the guide rail in each lead screw transmission mechanism, and the second temperature measuring instrument is arranged at the middle portion of the second sliding groove in each contact power-on mechanism.

[0025] In another aspect, to achieve the above object, the application provides a use method of the pulse current assisted rolling super-large H-shaped steel, comprising the following steps: a monitoring system obtains a difference ΔS of cross-sectional areas of a flange and a web according to appearance information of the super-large H-shaped steel uploaded by a visual camera, detects temperatures at the web and the flange of the super-large H-shaped steel by first and second temperature measuring instruments respectively, obtains a temperature difference between the web and the flange, feeds back temperature information to a control system, selects a current application mode by the control system, calculates an amplitude, a frequency, a duty cycle and a current density of the pulse current according to a control function, and controls a pulse power supply to output corresponding pulse current.

[0026] The pulse current is applied to the longitudinal power-on assembly and the transverse power-on assembly, the hydraulic cylinder pushes the piston rod, the traction block is driven away from the hydraulic cylinder, the traction rod is driven by the traction block to pull the first sliding groove inward, so that the first sliding groove is folded, the transverse power-on assembly connected with the first sliding groove and the second sliding groove is clamped inward, the two rollers are respectively attached to the two sides of the flange, the second insulating shell is stressed, the fifth sliding block fixedly connected with the second insulating shell is further driven to slide along the sliding rail, the spring sheet is bent, the probe of the displacement sensor is retracted, the displacement information is measured, the displacement sensor feeds back the information to the hydraulic cylinder, the hydraulic cylinder adjusts the pressure of the roller on the super-large H-shaped steel, and the roller is always attached to the side surface of the flange with a constant force.

[0027] The first temperature measuring instrument and the second temperature measuring instrument acquire temperature information of the super H-shaped steel after heat compensation, and the information is fed back to the control system, and the control system adjusts the output current according to the feedback information.

[0028] Optionally, the construction process of the control system comprises:

[0029] Based on finite element simulation, the relationship between the temperature difference ΔT between the flange and the web and the pulse current amplitude Im, the frequency f, the duty ratio q, the current density p and the cross-sectional area difference ΔS of the flange and the web is obtained, and the following control function is established:

[0030] ΔT = θ (Im, f, q, p, ΔS)

[0031] Based on the above function relationship, a control system is established for controlling the amplitude, frequency, duty ratio and current density of the pulse current output by the pulse power supply.

[0032] The technical effects of the present application are:

[0033] The application discloses an electric field device for rolling super H-shaped steel and a use method thereof, which is used for applying pulse current heat compensation in the rolling process of super H-shaped steel, and comprises a rack, wherein the rack is internally provided with super H-shaped steel; a pulse current heat compensation structure is arranged in the rack, and a plurality of groups of the pulse current heat compensation structures are arranged in the rack in parallel and symmetrically; a monitoring system comprises first and second visual cameras and first and second temperature measuring instruments, wherein the first visual camera and the first temperature measuring instrument are arranged at the middle part of each inner wall of the rack, and the second visual camera and the second temperature measuring instrument are connected with the pulse current heat compensation structure.

[0034] The visual camera in the monitoring system scans the position and appearance information of the super H-shaped steel in real time, and feeds back the position information to the lead screw transmission system, and the lead screw transmission system adjusts the position of the contact electrification mechanism, the first lead screw adjusts the vertical position of the contact electrification mechanism, and the second lead screw adjusts the horizontal position of the contact electrification mechanism. The hydraulic cylinder in the contact electrification mechanism pushes the piston rod, so that the transverse electrification assembly and the longitudinal electrification assembly complete the contact clamping of the super H-shaped steel; after the roller of the transverse electrification assembly is attached to the flange side, the spring sheet is bent under pressure, the displacement sensor probe is retracted, the displacement sensor converts the force received by the spring sheet into displacement information, and feeds back the force to the hydraulic cylinder; the hydraulic cylinder adjusts the clamping force, so that the contact electrification assembly always maintains the contact clamping state of the super H-shaped steel flange part with constant force;

[0035] The monitoring system obtains the difference value of the cross-sectional area of the flange and the web ΔS according to the appearance information of the super H-shaped steel uploaded by the visual camera, obtains the temperature difference ΔT of the flange and the web of the super H-shaped steel accurately according to the temperature detector on the feeding side of the device, and uploads ΔS and ΔT to the control system; the control system selects the current application mode, calculates the output amplitude, frequency, duty cycle and current density of the pulse current according to the control function, controls the pulse power supply to output the corresponding pulse current; the temperature detector on the discharging side of the device obtains the temperature information of the super H-shaped steel after heat compensation, and feeds back the information to the control system, and the control system adjusts the output current according to the feedback information. The device is fully automatically controlled, has high control precision, can effectively improve the quality problems in the rolling process of the super H-shaped steel, and improves the rolling quality.

[0036] The present application can stably apply pulse current to the super H-shaped steel, compensate heat by using current, effectively improve the temperature unevenness problem of the flange and the web due to different cooling speeds, and the electroplasticity of the current can also improve the mechanical properties of the rolled piece and improve the rolling quality. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0038] The drawings forming part of the present application are used to provide further understanding of the present application, the illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0039] Figure 1 It is an axial view in the embodiment of the present application;

[0040] Figure 2 It is a structure schematic view of the lead screw transmission mechanism in the embodiment of the present application;

[0041] Figure 3 It is a structure schematic view of the contact electrification mechanism in the embodiment of the present application;

[0042] Figure 4 It is a structure schematic view of the longitudinal electrification assembly in the embodiment of the present application;

[0043] Figure 5 It is a structure schematic view of the transverse electrification assembly in the embodiment of the present application;

[0044] Figure 6 It is a schematic view of the displacement sensor and spring sheet installation in the embodiment of the present application;

[0045] Figure 7 Electric field effect flow chart for rolling super large H-shaped steel

[0046] Label explanation: 1 is the rack; 201 is the first lead screw, 202 is the second lead screw, 203 is the first sliding support rod, 204 is the second sliding support rod, 205 is the first drive motor, 206 is the second drive motor, 207 is the first bearing seat, 208 is the second bearing seat, 209 is the first sliding block, 210 is the second sliding block, 211 is the third sliding block, 212 is the first lead screw nut, 213 is the second lead screw nut, 214 is the guide rail; 301 is the first visual camera, 302 is the second visual camera, 303 is the first temperature meter, 304 is the second temperature meter; 401 is the hydraulic cylinder, 402 is the first sliding groove, 403 is the second sliding groove, 404 is the pin, 405 is the traction rod, 406 is the traction block, 407 is the fourth sliding block; 501 is the connecting column, 502 is the buffer barrel, 503 is the spring, 504 is the first insulating shell, 505 is the roller; 601 is the sliding rail, 602 is the fifth sliding block, 603 is the second insulating shell, 604 is the position sensor, 605 is the spring piece, 7 is the super large H-shaped steel. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0048] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings, and several embodiments of the present application are given, but the present application can be realized in many different forms, and is not limited to the embodiments described herein, on the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0049] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be a middle element, and when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be a middle element, and the terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of the terms "and / or" includes a set of one or more associated listed items.

[0051] Embodiment one

[0052] As shown in the embodiment, a rolling ultra-large H-shaped steel electric field device and its use method are provided, which comprises: Figures 1-7 A rack 1 is provided with an ultra-large H-shaped steel 7 inside the rack 1;

[0053] A pulse current heat compensation structure is provided with multiple groups, and the structures of the multiple groups of pulse current heat compensation structures are the same. The two ends of each group of pulse current heat compensation structures are respectively connected with the left inner wall and the right inner wall of the rack 1, and the multiple groups of pulse current heat compensation structures are symmetrically arranged in parallel inside the rack 1 through the ultra-large H-shaped steel 7. A monitoring system includes a vision system and a temperature measurement system, both of which are arranged inside the rack (1).

[0054] The monitoring system includes first and second vision cameras and first and second temperature measuring instruments. The first vision camera and the first temperature measuring instrument are arranged in the middle of each inner wall of the rack, and the second vision camera and the second temperature measuring instrument are connected with the pulse current heat compensation structure.

[0055] The monitoring system obtains the difference ΔS of the cross-sectional area of the flange and the web according to the appearance information of the ultra-large H-shaped steel (7) uploaded by the vision camera, detects the temperature of the web and the flange of the ultra-large H-shaped steel (7) through the first temperature measuring instrument (303) and the second temperature measuring instrument (304) respectively, obtains the temperature difference between the web and the flange, and feeds back the temperature information to the control system. The control system selects the current application mode, calculates the amplitude, frequency, duty cycle and current density of the pulse current according to the control function, and controls the pulse power supply to output the corresponding pulse current.

[0056]

[0057] ​The pulse current is applied to the longitudinal energizing assembly and the transverse energizing assembly, the piston rod is pushed by the hydraulic cylinder (401), the traction block (406) is driven away from the hydraulic cylinder (401), the traction rod (405) is pulled inward by the traction block (406), the first sliding groove (402) is folded, the transverse energizing assembly connected with the first sliding groove (402) and the second sliding groove (403) is clamped inward, the two rollers (505) are respectively attached to the two sides of the flange, the second insulating shell (603) is stressed, the fifth sliding block (602) fixedly connected with the second insulating shell (603) is further driven to slide along the slide rail (601), the spring sheet (605) is bent, the probe of the displacement sensor (604) is retracted, the displacement information is measured, the displacement sensor (604) feeds back the information to the hydraulic cylinder (401), the hydraulic cylinder (401) adjusts the pressure of the roller 505 on the super H-shaped steel, and the roller (505) is always attached to the side of the flange with constant force.

[0058] The temperature information of the super H-shaped steel (7) after heat compensation is obtained by the first temperature measuring instrument (303) and the second temperature measuring instrument (304), and the information is fed back to the control system, and the control system adjusts the output current according to the feedback information.

[0059] The introduction of pulse current in the process of metal plastic deformation can produce electroplastic effect, on the one hand, the heat effect of the current can be used to realize the heat compensation function, on the other hand, the non-thermal effect of the current can be used to reduce the deformation resistance and improve the forming performance, and at the same time, the grains can be refined, the microstructure of the material can be improved, and the small defects can be cured. Therefore, the introduction of pulse current in the process of rolling super H-shaped steel can improve the rolling quality of super H-shaped steel.

[0060] The embodiment discloses a device and method for applying pulse current heat compensation in the process of rolling super H-shaped steel, the device comprises a rack, a lead screw transmission mechanism, a monitoring system and a contact energizing mechanism: the lead screw transmission mechanism comprises a first lead screw rotatably connected with the rack and a second lead screw transmissionally connected with the first lead screw; the contact energizing mechanism comprises a longitudinal energizing assembly and a transverse energizing assembly, which are transmissionally connected with the second lead screw through a third sliding block; the visual system comprises a first visual camera fixedly connected with the rack and a second visual camera fixedly arranged on the contact energizing mechanism. The lead screw transmission mechanism, the monitoring system and the contact energizing mechanism are symmetrically arranged on the left and right sides and the upper and lower sides of the rack. The application can stably apply pulse current to the super H-shaped steel, compensate heat by using the current, effectively improve the temperature unevenness problem of the flange and the web due to different cooling speeds, and improve the mechanical properties of the rolled piece and the rolling quality by using the electroplasticity of the current.

[0061] The monitoring system obtains the difference ΔS of the cross-sectional areas of the flange and the web according to the appearance information of the super H-shaped steel uploaded by the visual camera, and obtains the temperature difference ΔT of the flange and the web of the super H-shaped steel according to the temperature detector on the feeding side of the device, and uploads ΔS and ΔT to the control system; the control system selects the current application mode, calculates the output amplitude, frequency, duty cycle and current density of the pulse current according to the control function, controls the pulse power supply to output the corresponding pulse current; the temperature detector on the discharging side of the device obtains the temperature information of the super H-shaped steel after heating, and feeds back the information to the control system, and the control system adjusts the output current according to the feedback information. The device is fully automatic control, high control precision, can effectively improve the quality problem of super H-shaped steel rolling process, improve the rolling problem.

[0062] Based on finite element simulation, the relationship between the temperature difference ΔT between the flange and the web, the pulse current amplitude Im, the frequency f, the duty cycle q, the current density p and the difference ΔS of the cross-sectional area of the flange and the web is obtained, and the following control function is established:

[0063] ΔT=θ(Im,f,q,p,ΔS)

[0064] Based on the above function relationship, a control system is established for controlling the amplitude, frequency, duty cycle and current density of the pulse current output by the pulse power supply.

[0065] The rack 1, the lead screw transmission mechanism, the monitoring system and the contact electrifying mechanism are symmetrically arranged on the left and right sides and the upper and lower sides inside the rack 1, and include four contact electrifying mechanisms, i.e. the upper, lower, left and right contact electrifying mechanisms.

[0066] The lead screw transmission mechanism includes a first lead screw 201 fixedly connected with the rack 1, and a second lead screw 202 slidably connected with the first lead screw 201 through a first sliding block 209, and the contact electrifying mechanism is slidably connected with the second lead screw 202 through a third sliding block 211. The visual system includes a first visual camera 301 fixedly connected with the rack 1, and a second visual camera 302 fixedly arranged on the contact electrifying mechanism; the contact electrifying mechanism is slidably connected with the second lead screw 202 through the third sliding block 211.

[0067] In the lead screw transmission mechanism, one end of the first lead screw 201 is fixedly connected with a first driving motor 205, and the other end is fixedly connected with a first bearing seat 207 fixedly arranged on the rack 1, and at least two first sliding support rods 203 are fixedly connected between the rack 1 and the first bearing seat 207;

[0068] The first screw rod 201 is matched with a first screw rod nut 212, the first sliding block 209 is fixedly connected with the first screw rod nut 212, a second driving motor 206 is fixedly arranged on the first sliding block 209, one end of the second screw rod 202 is fixedly connected with the second driving motor 206, and one end is fixedly connected with a second bearing seat 208;

[0069] The second bearing seat 208 is fixedly arranged on the second sliding block 210, the second sliding block 210 is slidably connected with a guide rail 214 fixedly arranged on the rack 1, and at least two second sliding support rods 204 are fixedly arranged between the first sliding block 209 and the second bearing seat 208;

[0070] The second screw rod 202 is matched with a second screw rod nut 213, the second screw rod nut 213 is fixedly connected with a third sliding block 211, and a second visual camera 302 and a contact energizing mechanism are arranged on the third sliding block 211.

[0071] The device is placed on the feeding side of the rolling mill, when the super-large H-shaped steel enters the device, the visual camera in the monitoring system scans the appearance information and position information of the super-large H-shaped steel, and feeds the position information to the screw rod driving mechanism, the first driving motor 205 drives the first screw rod 201, adjusts the vertical position of the contact energizing mechanism, the second driving motor 206 drives the second screw rod 202, adjusts the horizontal position of the contact energizing mechanism, and the contact energizing mechanism accurately contacts the flange part of the super-large H-shaped steel.

[0072] The contact energizing mechanism can be implemented, and the contact energizing mechanism includes a hydraulic cylinder 401 fixedly arranged on the third sliding block 211 and first sliding grooves 402 symmetrically arranged on both sides of the third sliding block 211, one end of the first sliding groove 402 is rotatably connected with the third sliding block 211 through a pin 404;

[0073] The middle part of the first sliding groove 402 is rotatably connected with one end of a traction rod 405 through the pin 404, the other end of the traction rod 405 is rotatably connected with a traction block 406 through the pin 404, the traction block 406 is fixedly connected with a longitudinal energizing assembly, and the piston rod end of the hydraulic cylinder 401 is fixedly connected with the longitudinal energizing assembly;

[0074] Two first sliding grooves 402 are respectively in sliding connection with fourth sliding blocks 407, the fourth sliding blocks 407 are respectively in sliding connection with a second sliding groove 403, the middle part of the second sliding groove 403 is fixedly connected with a longitudinal power-on assembly, the fourth sliding blocks 407 are fixedly provided with power-on assemblies, the fourth sliding blocks 407 and the power-on assemblies fixedly arranged on the fourth sliding blocks 407 jointly form a transverse power-on assembly, and the middle part of the second sliding groove 403 is fixedly provided with a second temperature detector 304 at the front and rear. The first temperature detector 303 and the second temperature detector 304 on the feeding side of the device detect the temperatures of the web plate and the flange of the super-large H-shaped steel 7, and then obtain the temperature difference between the web plate and the flange, and feed the temperature information to the control system, the control system selects a current application mode, calculates the output amplitude, frequency, duty cycle and current density of the pulse current according to the control function, and controls the pulse power supply to output the corresponding pulse current; the first temperature detector 303 and the second temperature detector 304 on the discharging side of the device obtain the temperature information of the super-large H-shaped steel after heating, and feed the information to the control system, and the control system adjusts the output current according to the feedback information.

[0075] The longitudinal power-on assembly can be implemented and includes a connecting column 501 fixedly connected with the piston rod end of the hydraulic cylinder 401, the head of the connecting column 501 is slidingly arranged in the cavity of the buffer barrel 502, the head of the connecting column 501 and the bottom of the cavity of the buffer barrel 502 are respectively fixedly connected with springs 503, the bottom of the buffer barrel 502 is fixedly connected with a first insulating shell 504, the first insulating shell 504 is rotatably connected with a roller 505, and the roller 505 is connected with a pulse power supply. The hydraulic cylinder 401 drives the piston rod, so that the roller 505 of the longitudinal power-on assembly is attached to the bottom surface of the flange, and the head of the connecting column 501 fixedly connected with the piston rod in the buffer barrel 502 compresses the spring, thereby buffering.

[0076] The transverse power-on assembly can be implemented and includes a sliding rail 601 fixedly arranged on the fourth sliding block 407, a fifth sliding block 602 slidingly connected with the sliding rail 601, a second insulating shell 603 fixedly arranged on the fifth sliding block 602, a displacement sensor 604 fixedly arranged on the second insulating shell 603, a probe of the displacement sensor 604 being on the side surface of the fourth sliding block 407, spring sheets 605 fixedly arranged between the fourth sliding block 407 and the insulating shell 603, the second insulating shell 603 being rotatably connected with a roller 505, and the roller 505 being connected with a pulse power supply.

[0077] The hydraulic cylinder 401 pushes the piston rod, and the traction block 406 is away from the hydraulic cylinder body. The traction rod 405 is driven by the traction block 406, and the first sliding groove 402 is pulled inward to make it fold. The first sliding groove 402 and the second sliding groove 403 are connected with the horizontal power supply assembly. The two rollers 505 are respectively attached to the two sides of the flange. The second insulating shell 603 is stressed to drive the fifth sliding block 602 fixedly connected thereto to slide along the sliding rail 601, and the spring sheet 605 is bent to retract the probe of the displacement sensor 604 measuring the distance between the fourth sliding block 407 and the second insulating shell 603. The structure converts the pressure of the roller 505 on the super large H-shaped steel into the pressure of the spring sheet 605, and then converts it into the displacement information measured by the displacement sensor 604. The displacement sensor 604 feeds back the information to the hydraulic cylinder 401, and the hydraulic cylinder 401 adjusts the pressure of the roller 505 on the super large H-shaped steel, so that the roller 505 is always attached to the side of the flange with constant force.

[0078] It can be implemented. Since the thickness of the super large H-shaped steel blank may not be uniform at the wing plate, the cooling speed of different thicknesses is different, and different power supply methods can select different current paths. By changing the way of applying pulse current to the upper, lower, left and right four contact power supply mechanisms in the device, the current passes through the wing plate part which cools down faster, and the super large H-shaped steel is heated.

[0079] It can be implemented. The positive pulse current is applied to the upper and lower contact power supply mechanisms on the same side of the left and right sides of the device, and the negative pulse current is applied to the upper and lower contact power supply mechanisms on the other side of the left and right sides of the device.

[0080] In one specific embodiment, the use method of the present embodiment is different from that of embodiment one only in that the positive pulse current is applied to the upper (or lower) contact power supply mechanism on the same side of the left and right sides of the device, and the negative pulse current is applied to the upper (or lower) contact power supply mechanism on the other side of the left and right sides of the device.

[0081] In one embodiment, the use method of the present embodiment is different from that of embodiment one only in that the positive pulse current is applied to the upper (or lower) contact power supply mechanism on the same side of the left and right sides of the device, and the negative pulse current is applied to the upper (or lower) contact power supply mechanism on the other side of the left and right sides of the device.

[0082] Different thicknesses have different cooling speeds, and different power supply methods can select different current paths. By changing the way of applying pulse current to the upper, lower, left and right four contact power supply mechanisms in the device, the current passes through the wing plate part which cools down faster, and the super large H-shaped steel is heated.

[0083] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electric field application device for rolling extra-large H-beams, characterized in that, The utility model relates to a kind of electric field effect devices for rolling super H-shaped steel, including: Rack (1), the super H-shaped steel (7) is arranged in the rack (1); Pulse current heat compensation structure, the pulse current heat compensation structure is provided with multiple groups, the structure of multiple groups pulse current heat compensation structure is identical, the left inner wall and right inner wall of each group pulse current heat compensation structure are connected with the rack (1) respectively, and the pulse current heat compensation structure is symmetrically arranged in the inside of the rack (1) by super H-shaped steel (7) between multiple groups; Monitoring system, including vision system and temperature measurement system, the vision system and the temperature measurement system are arranged in the inside of the rack (1); The pulse current heat compensation structure is composed of two groups of transmission power-on mechanisms which are identical in structure and symmetrically arranged adjacent to each other; The transmission power-on mechanism includes a lead screw transmission mechanism and a contact power-on mechanism, and the contact power-on mechanism is arranged above the lead screw transmission mechanism; The contact power-on mechanism includes a hydraulic cylinder (401), a first sliding groove (402), a second sliding groove (403), a pin (404), a traction rod (405), a traction block (406), a fourth sliding block (407), a longitudinal power-on assembly and a transverse power-on assembly. The hydraulic cylinder (401) is fixedly arranged on one side of the third sliding block (211), two symmetrical first sliding grooves (402) are rotatably connected to the bottom of the third sliding block (211), the longitudinal power-on assembly is arranged below the bottom of the third sliding block (211), the traction block (406) is fixedly arranged on the longitudinal power-on assembly, the two symmetrical first sliding grooves (402) are rotatably connected to the two sides of the traction block (406) through the traction rod (405), and the connections between the third sliding block (211), the first sliding grooves (402), the traction rod (405) and the traction block (406) are realized by the pins (404). The second sliding groove (403) is arranged at the bottom of the longitudinal power-on assembly, the fourth sliding blocks (407) are slidably connected to the two ends of the bottom of the second sliding groove (403), and the transverse power-on assembly is arranged on one side of each fourth sliding block (407). The transverse power-on assembly includes a sliding rail (601), a fifth sliding block (602), a second insulating shell (603), a displacement sensor (604) and a spring sheet (605). One end of the sliding rail (601) is fixedly connected to the fourth sliding block (407), the other end is slidably connected to the fifth sliding block (602), the second insulating shell (603) is arranged above the fifth sliding block (602), the roller (505) is rotatably connected inside the second insulating shell (603), the pulse power supply is connected to the roller (505), the displacement sensor (604) is arranged above the second insulating shell (603), the displacement sensor (604) is connected to one side of the fourth sliding block (407) through a probe, and the spring sheet (605) is fixedly arranged between the fourth sliding block (407) and the insulating shell (603).

2. The electric field effect device for rolling super H-shaped steel according to claim 1, characterized in that, The screw rod transmission mechanism comprises a first screw rod (201), a second screw rod (202), a first sliding support rod (203), a second sliding support rod (204), a first driving motor (205), a second driving motor (206), a first bearing seat (207), a second bearing seat (208), a first sliding block (209), a second sliding block (210), a third sliding block (211), a first screw rod nut (212), a second screw rod nut (213) and a guide rail (214); The first screw rod (201) is symmetrically provided with a plurality of first sliding support rods (203) on both sides, and the height of the first screw rod (201) and the plurality of first sliding support rods (203) is the same; one end of the first screw rod (201) and the plurality of first sliding support rods (203) is connected with the first driving motor (205), and the other end is provided with the first bearing seat (207); the middle part of the first sliding support rod (203) is provided with the first sliding block (209); and the first screw rod (201) is connected with one end of the first sliding block (209) through the first screw rod nut (212). The second screw rod (202) is connected with the second driving motor (206) through the first sliding block (209) at one end, and is fixedly connected with the second bearing seat (208) through the third sliding block (211) at the other end; the second screw rod (202) is fixedly provided with the second screw rod nut (213) at the connection position with the third sliding block (211); and a plurality of second sliding support rods (204) which are equal in length to the second screw rod (202) are symmetrically arranged on both sides of the second screw rod (202). The second bearing seat (208) is fixedly connected with the second sliding block (210) on one side; the guide rail (214) is fixedly connected to the inner wall of the rack (1); and the guide rail (214) is slidingly connected with the second sliding block (210).

3. The electric field device for rolling ultra-large H-shaped steel according to claim 1, wherein the longitudinal electric field assembly comprises a connecting column (501), a buffer barrel (502), a spring (503), a first insulating shell (504) and a roller (505). One end of the connecting column (501) is connected with the hydraulic cylinder (401) through a piston rod, and the other end is slidingly arranged in the cavity of the buffer barrel (502) through the spring (503); the bottom of the cavity of the buffer barrel (502) is fixedly connected with the spring (503); the bottom of the buffer barrel (502) is fixedly connected with the first insulating shell (504); and the roller (505) is rotatably arranged in the first insulating shell (504).

4. The electric field device for rolling ultra-large H-shaped steel according to claim 1, wherein the visual system comprises a first visual system and a second visual system; the first visual system comprises a plurality of first visual cameras (301); and the second visual system comprises a plurality of second visual cameras (302). ​ ​ A plurality of first visual cameras (301) are arranged in the middle of each inner wall of the rack (1), and a plurality of second visual cameras (302) are arranged on one side of the hydraulic cylinder (401) in each contact power-on mechanism; The temperature measurement system comprises a first temperature measurement system and a second temperature measurement system, the first temperature measurement system comprises a plurality of first temperature measuring instruments (303), and the second temperature measurement system comprises a plurality of second temperature measuring instruments (304); The middle of the guide rail (214) in each lead screw transmission mechanism is provided with one first temperature measuring instrument (303) on both sides, and the middle of the second sliding groove (403) in each contact power-on mechanism is provided with one second temperature measuring instrument (304) on both sides.

5. The use method of the electric field device for rolling ultra-large H-shaped steel according to any one of claims 1-4, characterized in that, The monitoring system obtains the difference ΔS of the cross-sectional areas of the flange and the web from the appearance information of the ultra-large H-shaped steel (7) uploaded by the visual camera, detects the temperatures at the web and the flange of the ultra-large H-shaped steel (7) by the first temperature measuring instrument (303) and the second temperature measuring instrument (304) respectively, obtains the temperature difference between the web and the flange, and feeds back the temperature information to the control system, the control system selects the current application mode, calculates the amplitude, frequency, duty cycle and current density of the pulse current according to the control function, and controls the pulse power supply to output the corresponding pulse current; The pulse current is applied to the longitudinal power-on assembly and the transverse power-on assembly, the hydraulic cylinder (401) drives the piston rod to move away from the hydraulic cylinder (401), the traction block (406) is driven by the traction rod (405) to pull the first sliding groove (402) inward, so that the transverse power-on assembly connected with the first sliding groove (402) and the second sliding groove (403) is clamped inward, the two rollers (505) are respectively attached to the two sides of the flange, the second insulating shell (603) is stressed, the fifth sliding block (602) fixedly connected with the second insulating shell (603) is further driven to slide along the slide rail (601), the spring sheet (605) is bent, the probe of the displacement sensor (604) is retracted, the displacement information is measured, and the displacement sensor (604) feeds back the information to the hydraulic cylinder (401), the hydraulic cylinder (401) adjusts the pressure of the roller (505) on the ultra-large H-shaped steel, and the roller (505) is always attached to the side surface of the flange with a constant force; The temperature information of the ultra-large H-shaped steel (7) after heating is obtained by the first temperature measuring instrument (303) and the second temperature measuring instrument (304), and the information is fed back to the control system, and the control system adjusts the output current according to the feedback information.

6. The use method according to claim 5, characterized in that, The construction process of the control system comprises: Based on finite element simulation, the relationship between the temperature difference ΔT between the flange and the web, the pulse current amplitude Im, the frequency f, the duty cycle q, the current density p and the difference ΔS of the cross-sectional areas of the flange and the web is obtained, and the following control function is established: ΔT = θ (Im, f, q, p, ΔS) Based on the above function relationship, a control system is established for controlling the amplitude, frequency, duty cycle and current density of the pulse current output by the pulse power supply.

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