Electromagnetic annealing furnace

Abstract

The present invention provides an electromagnetic annealing furnace, which belongs to the technical field of annealing processing. It includes a bottom magnetic control device and an outer shell, wherein the bottom magnetic control device is located inside the outer shell and penetrates the bottom of the outer shell top shell, and the bottom magnetic control device includes a displacement platform, wherein the displacement platform is located inside the top of the outer shell, and a liquid cooling component is provided at the bottom of the displacement platform, wherein the liquid cooling component is located inside the outer shell, and a magnetocaloric component is provided inside the liquid cooling component. The present invention heats up the surface of the irregular inner furnace body by setting a magnetocaloric component, so that the irregular workpiece inside the inner furnace body is heated evenly, thereby allowing the strip workpiece to be synchronously annealed as a whole, improving the annealing quality of the workpiece, and at the same time, using the liquid cooling component to cool down the magnetocaloric component, which can reduce the influence of high temperature on the magnetic field of the coil, so as to solve the problem that the existing electromagnetic annealing furnace will affect the processing quality when processing irregular strip workpieces, and at the same time, the annealing efficiency will be reduced due to heat conduction.

Description

Technical Field

[0001] The invention relates to the technical field of annealing processing, in particular to an electromagnetic annealing furnace. Background Art

[0002] Most of the existing electromagnetic vacuum annealing furnaces use coils wound outside the vacuum cavity to generate a magnetic field in the sample area inside the cavity. Due to the characteristics of the magnetic lines of force, the magnetic field uniformity is poor. In addition, most of the existing electromagnetic vacuum annealing furnaces use resistance wires for heating. Since the resistance wires themselves have the characteristics of large thermal inertia and slow heating and cooling rates, what is more serious is that the heating current applied by the resistance wires will affect the magnetic field distribution in the annealing furnace cavity and change the magnetic field annealing environment of the sample.

[0003] When using the existing continuous electromagnetic annealing furnace to continuously process large special-shaped workpieces, for example: strip steel workpieces with special-shaped surfaces, in order to ensure the same annealing rate, a special-shaped annealing furnace should be used. Since a spiral coil is used to generate a magnetic field, when the magnetic field acts on the surface of the special-shaped annealing furnace, the heat distribution on the surface of the special-shaped annealing furnace will be uneven, resulting in uneven heating of the surface of the special-shaped workpiece, which may easily cause over-annealing of part of the workpiece surface, thereby affecting the processing quality of the workpiece. At the same time, when the annealing furnace heats up rapidly due to electromagnetic induction, the heat will be transferred to the coil. At this time, if the coil is energized, the magnetic moment of the magnetic field generated by it will change, resulting in a decrease in the intensity of the generated magnetic field, thereby reducing the annealing efficiency. Therefore, the present application provides an electromagnetic annealing furnace to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an electromagnetic annealing furnace, which heats the surface of an irregular inner furnace body by arranging a magnetic thermal component so that the irregular workpiece inside the inner furnace body is heated evenly, thereby allowing the strip steel workpiece to be synchronously annealed as a whole, thereby improving the annealing quality of the strip steel workpiece. At the same time, the liquid cooling component is used to cool the magnetic thermal component, which can reduce the influence of high temperature on the magnetic field of the coil, thereby solving the problem that the existing electromagnetic annealing furnace will affect the processing quality when processing irregular strip steel workpieces and will reduce the annealing efficiency due to heat conduction.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] An electromagnetic annealing furnace, comprising a bottom magnetic control device and an outer shell, wherein the bottom magnetic control device is located inside the outer shell and penetrates the bottom of the top shell of the outer shell, wherein the bottom magnetic control device comprises a displacement platform, wherein the displacement platform is located inside the top of the outer shell, wherein a liquid cooling component is provided at the bottom of the displacement platform, wherein the liquid cooling component is located inside the outer shell, wherein a magnetocaloric component is provided inside the liquid cooling component;

[0007] The magnetocaloric component includes a limiting column, and an arc-shaped claw bar is fixedly installed on the side wall of the limiting column. The arc-shaped claw bars are provided with four groups, and two adjacent groups of arc-shaped claw bars are spaced 90 degrees apart. The connections between the four groups of arc-shaped claw bars and the limiting column are vertically arranged. The side wall of the arc-shaped claw bar is inlaid with multiple resistor blocks. The multiple groups of resistor blocks on the same arc-shaped claw bar are divided into three areas on the arc-shaped claw bar, and the number of resistor blocks in the three areas is the same. The multiple groups of resistor blocks on the four groups of arc-shaped claw bars correspond to each other one by one. The corresponding resistor block end walls on two adjacent groups of arc-shaped claw bars are fixedly installed with the same arc-shaped coil, and a magnetic cover is formed between the multiple groups of arc-shaped coils and the arc-shaped claw bars.

[0008] Optionally, a permanent magnet is fixedly mounted on the end wall of the limiting column, and the permanent magnet is located in the middle of a magnetic cover formed by a plurality of groups of arc-shaped coils and arc-shaped claw strips.

[0009] Optionally, the liquid cooling component includes an octagonal ring frame, a mounting hole is provided in the middle of the top of the octagonal ring frame, the outer wall of the limiting column is fixedly connected to the mounting hole, the outer end walls of the four groups of arc-shaped claw strips are fixedly connected to the inner wall of the octagonal ring frame, cylindrical grooves are provided on the eight groups of claw arms in the middle of the octagonal ring frame, and cache grooves are provided on the end walls of the eight groups of claw arms of the octagonal ring frame.

[0010] Optionally, guide holes are opened at the tops of the ends of the eight groups of claw arms of the eight-claw ring frame, and the guide holes are connected to the inside of the cache slot. Connecting tubes are fixedly installed on the inner walls of the four non-adjacent groups of cache slots. The connecting tubes pass through the side walls of the cache slots, and the two ends of the connecting tubes are respectively connected to the inside of the cache slot and the cylindrical slot.

[0011] Optionally, the side walls of the eight groups of cache slots are all provided with reflux holes, and the cache slots are connected to the interior of the cylindrical slots through the reflux holes, and the apertures of the reflux holes in the four groups of cache slots equipped with connecting tubes are smaller than those of the other four groups of reflux holes.

[0012] Optionally, connecting holes are opened on both sides of the eight groups of claw arms of the eight-claw ring frame, and two groups of the connecting holes are respectively connected to the inside of the cylindrical groove and the cache groove. An arc-shaped liquid cooling pipe is provided between two adjacent groups of claw arms on the eight-claw ring frame, and the pipe openings at both ends of the arc-shaped liquid cooling pipe are respectively sealed and connected to the corresponding connecting holes on the two groups of claw arms. A plurality of groups of arc-shaped silicon steel sheets are provided between the two adjacent groups of claw arms on the eight-claw ring frame, and the arc-shaped silicon steel sheets are fixedly connected to the inner wall of the eight-claw ring frame and are evenly distributed between the two adjacent groups of claw arms on the eight-claw ring frame. The arc-shaped liquid cooling pipe is fixedly penetrated through the corresponding plurality of groups of arc-shaped silicon steel sheets, and the plurality of groups of arc-shaped coils and arc-shaped claw strips are in contact with the inner wall of the arc-shaped silicon steel sheets.

[0013] Optionally, pillars are fixedly installed on both sides of the top of the displacement platform, and the two groups of the pillars slide through the bottom of the outer shell, and the tops of the two groups of pillars are respectively fixedly connected to the two sides of the octagonal ring frame, and the same support plate is fixedly installed in the middle of the two groups of pillars located inside the outer shell, and water pipes are fixedly installed on the outer side of the top of the support plate. The water pipes are provided with eight groups and are sealed and connected with the corresponding eight groups of guide holes. The water pipes are connected with the corresponding cache slots, and the four non-adjacent groups of water pipes are respectively sealed and connected with the corresponding four groups of connecting pipe ports.

[0014] Optionally, a water inlet main pipe and a water outlet main pipe are fixedly installed on both sides of the top of the displacement platform, and the water inlet main pipe and the water outlet main pipe both pass through the displacement platform, the water inlet main pipe and the water outlet main pipe both slide through the bottom of the outer shell, and the water inlet main pipe and the water outlet main pipe are respectively connected to the water inlet pipe and the water outlet pipe, four groups of water inlet branches are sealed and fixedly connected to the outer side of the top of the water inlet main pipe, and the four groups of water inlet branches are respectively sealed and connected to the water guide pipe ports connected to four groups of connecting pipes, and four groups of water outlet branches are sealed and fixedly connected to the outer side of the top of the water outlet main pipe, and the four groups of water outlet branches are respectively sealed and connected to the other four groups of water guide pipe ports.

[0015] Optionally, a cylinder is fixedly installed on the top of the outer shell, and the output end of the cylinder is fixedly connected to the top of the displacement platform. An inner layer is opened inside the outer shell, and a spiral coil is clamped on the inner wall of the inner layer, and the spiral coil and the arc coil are both connected to an external power supply.

[0016] Optionally, an inner furnace body is fixedly mounted on the inner wall of the outer shell, and the inner furnace body coincides with the center line of the spiral coil, the arc surface on the inner furnace body is located inside the magnetic cover formed by the arc coil and the arc claw strip, and the inner wall of the inner furnace body is coated with an insulation layer.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] In the above scheme, the strip steel workpiece with the irregular surface is placed on the external conveyor belt, so that it passes through the inner furnace body, and at the same time, the irregular surface of the workpiece is fitted with the irregular surface on the inner furnace body, so that the irregular surface on the inner furnace body is located in the magnetic cover formed by the arc coil and the arc claw strip, and a low-frequency and high-voltage alternating current is passed into the arc coil through an external power supply. Based on the eddy current effect, a large amount of heat will be generated on the irregular surface at the bottom of the inner furnace body, and the heat generated will be evenly distributed on the irregular surface of the inner furnace body, so that the strip steel workpiece with the irregular surface is evenly heated, and each part of it is evenly annealed.

[0019] Since the magnetic field generated by the arc coil is more concentrated than that generated by the spiral coil, the profiled surface of the inner furnace body located in the magnetic cover heats up faster. When the profiled surface of the workpiece heats up too quickly and far exceeds the shaped surface of the workpiece, the cylinder is driven to drive the displacement table downward at its output end, and the connection between the two sets of pillars drives the octagonal ring frame and the magnetic thermal assembly downward, so that the distance between the profiled surface of the inner furnace body and the magnetic cover increases. At this time, the magnetic flux passing through the profiled surface of the inner furnace body is reduced, so that the induced current generated inside is reduced, resulting in a reduction in the heat generated on its surface, so that its annealing rate is the same as the annealing rate of the shaped surface of the workpiece.

[0020] When the inner furnace body heats up rapidly due to electromagnetic induction, the heat is transferred to the arc coil, causing the magnetic field strength generated by it to decrease. By introducing cooling liquid into the water inlet main pipe, the cooling liquid enters the connecting pipe through four groups of water inlet branches and the water guide pipe, and then enters the cylindrical groove through the connecting pipe. Thereafter, it flows back to the buffer groove through the reflux hole, and then enters the adjacent cylindrical groove in the octagonal ring frame through the arc liquid cooling pipe, and at the same time enters the buffer groove through the reflux hole on the end wall of the cylindrical groove. At the same time, the heated cooling liquid in the octagonal ring frame can enter the water guide pipe and the water outlet branch through the guide hole, and then be discharged from the water outlet main pipe, thereby realizing the circulation of the cooling liquid in the octagonal ring frame. When the temperature in the arc coil rises, the cooling liquid in the octagonal ring frame and the arc-shaped silicon steel sheet can cool the arc coil. At the same time, the circulating cooling liquid can also dissipate heat for the arc-shaped silicon steel sheet, thereby reducing the influence of the inner furnace body temperature on the magnetic field generated by the arc coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of an electromagnetic annealing furnace;

[0023] Figure 2 It is a schematic diagram of the structure inside the outer shell;

[0024] Figure 3 It is a schematic diagram of the connection between the bottom magnetic control device and the inner furnace body;

[0025] Figure 4 Schematic diagram of the installation structure of the bottom magnetic control device in the outer shell;

[0026] Figure 5 Schematic diagram of the structure of the bottom magnetic control device;

[0027] Figure 6 This is a disassembled diagram of the bottom magnetic control device;

[0028] Figure 7 It is a schematic diagram of the installation structure of the magnetocaloric component and the liquid cooling component;

[0029] Figure 8 This is the installation position diagram of the resistor block;

[0030] Fig. 9 This is a disassembled diagram of the liquid cooling component;

[0031] Fig.10 It is the position diagram of the cylindrical groove in the octopus ring frame;

[0032] Fig.11 It is a position diagram of the cache slot in the octopus ring frame;

[0033] Fig.12 This is a plan view of the structure of the liquid cooling component;

[0034] Fig.13 It is a schematic diagram of the structure of the liquid cooling component;

[0035] Fig.14 for Fig.13 Enlarged view of point A in the middle.

[0036] Reference numerals:

[0037] 100, bottom magnetic control device; 101, displacement platform; 102, pillar; 103, support plate; 104, water pipe; 105, water inlet main pipe; 106, water inlet branch; 107, water outlet main pipe; 108, water outlet branch; 110, magnetic thermal component; 111, limit column; 112, arc claw strip; 113, resistor block; 114, permanent magnet; 115, arc coil; 120, liquid cooling Components; 121, octagonal ring frame; 122, receiving hole; 123, cylindrical groove; 124, buffer groove; 125, guide hole; 126, connecting hole; 127, connecting pipe; 128, reflux hole; 130, arc-shaped silicon steel sheet; 131, arc-shaped liquid cooling pipe; 200, outer shell; 210, cylinder; 220, inner layer; 221, spiral coil; 230, inner furnace body; 231, insulation layer.

[0038] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0039] The electromagnetic annealing furnace provided by the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0040] like Figures 1 to 14 As shown, an embodiment of the present invention provides an electromagnetic annealing furnace, including a bottom magnetic regulation device 100 and an outer shell 200, the bottom magnetic regulation device 100 is located inside the outer shell 200 and penetrates the bottom of the top shell of the outer shell 200, the bottom magnetic regulation device 100 includes a displacement stage 101, the displacement stage 101 is located on the inner side of the top of the outer shell 200, a liquid cooling component 120 is provided at the bottom of the displacement stage 101, the liquid cooling component 120 is located inside the outer shell 200, and a magnetocaloric component 110 is provided inside the liquid cooling component 120; the magnetocaloric component 110 includes a limiting column 111, and an arc-shaped claw strip 112 is fixedly installed on the side wall of the limiting column 111, and the arc-shaped claw strip 112 is provided with four groups, and two adjacent groups of arc-shaped claw strips 112 are spaced 90 degrees apart, and the four groups of arc-shaped claw strips 112 and the limiting column 111 are spaced 90 degrees apart. The connection parts of the positioning posts 111 are all arranged vertically. The arc-shaped claw strip 112 has a positioning function, which is convenient for the installation of the arc-shaped coil 115. The side walls of the arc-shaped claw strip 112 are inlaid with multiple resistor blocks 113. All the resistor blocks 113 do not contact each other. The resistor blocks 113 use thermistors, and their resistance values ​​change with changes in temperature. The magnitude of their resistance values ​​decreases with increasing temperature. The multiple groups of resistor blocks 113 located on the same arc-shaped claw strip 112 are divided into three areas on the arc-shaped claw strip 112, and the number of resistor blocks 113 in the three areas is the same. The multiple groups of resistor blocks 113 on the four groups of arc-shaped claw strips 112 correspond to each other one by one, and the end walls of the corresponding resistor blocks 113 on two adjacent groups of arc-shaped claw strips 112 are fixedly installed with the same arc-shaped coil 115.

[0041] When the resistor block 113 is connected to the arc coil 115, the current of the resistor block 113 and the arc coil 115 are the same, and the sum of the voltages of the resistor block 113 and the arc coil 115 is equal to the total voltage at both ends of the resistor block 113 and the arc coil 115 as a whole. Therefore, the resistor block 113 can play a role in voltage division and current shunting. When the temperature of the arc coil 115 increases due to the influence of the inner furnace body 230, the resistance of the resistor block 113 itself can be reduced. At this time, by changing the resistance of the resistor block 113, the arc coil 115 can output at the maximum power effect. A magnetic cover is formed between the multiple groups of arc coils 115 and the arc claw strips 112. The arc surface on the inner furnace body 230 is located in the magnetic cover. By changing the distance between the magnetic cover and the inner furnace body 230, the heating temperature of the arc surface on the inner furnace body 230 can be changed. In the present invention, the arc coil 115 is heated by an external electric current. An alternating current of 220 volts and a frequency of 20 to 30 Hz is introduced into the arc coil 115. At this time, an alternating magnetic field is generated around the arc coil 115. Under the action of the alternating magnetic field, the magnetic flux passing through the profiled surface on the inner furnace body 230 keeps changing. A large amount of heat is generated in the inner furnace body 230 based on the eddy current effect. In order to uniformly anneal the arc surface of the workpiece, the profiled surface of the workpiece should be fitted with the profiled surface on the inner furnace body 230. At the same time, since the profiled surface on the inner furnace body 230 is located in the magnetic cover formed by the arc coil 115 and the arc claw strip 112, the magnetic field generated by the arc coil 115 is more concentrated than the magnetic field generated by the spiral coil 221. Therefore, the profiled surface of the inner furnace body 230 located in the magnetic cover heats up faster. In order to control the annealing rate of the workpiece surface to be the same, the magnetic field generated by the arc coil 115 needs to be regulated in time.

[0042] As an implementation method in this embodiment, Figure 7 and Figure 8 As shown, a permanent magnet 114 is fixedly installed on the end wall of the limiting column 111, and the limiting column 111 can provide support for the permanent magnet 114. The permanent magnet 114 is located in the middle of the magnetic cover formed by multiple groups of arc coils 115 and the arc claw strip 112. In the present invention, the permanent magnet 114 is located in the middle of the magnetic cover formed by the arc coil 115 and the arc claw strip 112, which can change the shape of the electromagnetic field outside the arc coil 115, so that more energy can be concentrated in the middle of the arc coil 115, so that it can be concentrated through the special-shaped surface on the inner furnace body 230, thereby increasing the heating efficiency of the special-shaped surface on the inner furnace body 230, and the permanent magnet 114 has the effect of increasing the efficiency of the electromagnetic field.

[0043] In this embodiment, if Figures 9 to 14As shown, the liquid cooling component 120 includes an octagonal ring frame 121, a receiving hole 122 is opened in the middle of the top of the octagonal ring frame 121, the outer wall of the limiting column 111 is fixedly connected to the receiving hole 122, the octagonal ring frame 121 supports the limiting column 111, and the outer end walls of the four groups of arc-shaped claw strips 112 are fixedly connected to the inner wall of the octagonal ring frame 121. The octagonal ring frame 121 supports the entire magnetocaloric component 110, and cylindrical grooves 123 are opened on the eight groups of claw arms in the middle of the octagonal ring frame 121, and cache grooves 124 are opened on the end walls of the eight groups of claw arms of the octagonal ring frame 121. Cooling liquid can be cached in both the cylindrical grooves 123 and the cache grooves 124, so that the cooling liquid can flow in the arc-shaped liquid cooling tube 131, and the magnetocaloric component 110 can also be cooled.

[0044] The tops of the eight groups of claw arms at the ends of the eight-claw ring frame 121 are all provided with guide holes 125, and the guide holes 125 are connected to the inside of the buffer groove 124. The coolant in the buffer groove 124 can enter the water pipe 104 through the guide holes 125, and then flow out from the water outlet branch 108 and the water outlet main pipe 107. The inner walls of the four non-adjacent groups of buffer grooves 124 are all fixedly installed with connecting pipes 127. The connecting pipes 127 penetrate the side walls of the buffer grooves 124, and the two ends of the connecting pipes 127 are respectively connected to the inside of the buffer grooves 124 and the cylindrical grooves 123. The connecting pipes 127 can guide the coolant input by the water pipe 104 into the cylindrical groove 123. The side walls of the eight groups of buffer grooves 124 are all provided with reflux holes 128 , and the cache slot 124 is connected with the inside of the cylindrical slot 123 through the reflux hole 128, the coolant in the cylindrical slot 123 can enter the cache slot 124 through the reflux hole 128, the reflux hole 128 in the four groups of cache slots 124 equipped with connecting tubes 127 has a smaller aperture than the other four groups of reflux holes 128, therefore, the reflux rate of the coolant in the cylindrical slot 123 equipped with connecting tubes 127 flowing back to the cache slot 124 is lower than the reflux efficiency of the cylindrical slot 123 without connecting tubes 127, since the coolant entering the cylindrical slot 123 equipped with connecting tubes 127 does not flow through the high-temperature area, such a setting can effectively improve the use efficiency of the coolant.

[0045] Both sides of the eight groups of claw arms of the eight-claw ring frame 121 are provided with connecting holes 126, and the two groups of connecting holes 126 are respectively connected to the inside of the cylindrical groove 123 and the buffer groove 124. An arc-shaped liquid cooling pipe 131 is provided between two adjacent groups of claw arms on the eight-claw ring frame 121. The pipe openings at both ends of the arc-shaped liquid cooling pipe 131 are respectively sealed and connected with the corresponding connecting holes 126 on the two groups of claw arms. The two adjacent groups of claw arms in the eight-claw ring frame 121 can be connected together through the arc-shaped liquid cooling pipe 131, which is convenient for realizing the circulation of the coolant. A plurality of groups of arc-shaped silicon steel sheets 131 are provided between two adjacent groups of claw arms on the eight-claw ring frame 121. 30, the arc-shaped silicon steel sheet 130 is fixedly connected to the inner wall of the octagonal ring frame 121, and is evenly distributed between two adjacent groups of claw arms on the octagonal ring frame 121, and the arc-shaped liquid cooling pipe 131 is fixedly penetrated through the corresponding multiple groups of arc-shaped silicon steel sheets 130, and the arc-shaped liquid cooling pipe 131 can dissipate heat for the arc-shaped silicon steel sheet 130, and the multiple groups of arc coils 115 and the arc-shaped claw strips 112 are in contact with the inner wall of the arc-shaped silicon steel sheet 130, and the arc-shaped silicon steel sheet 130 can dissipate heat for the arc coil 115. In the present invention, by passing the coolant into the water inlet main pipe 105, the coolant is passed through The water passes through the four groups of water inlet branches 106 and the water guide pipe 104 and enters the connecting pipe 127, and then enters the columnar groove 123 through the connecting pipe 127, and then flows back to the buffer groove 124 through the reflux hole 128, and then enters the adjacent columnar groove 123 in the octagonal ring frame 121 through the arc-shaped liquid cooling pipe 131, and at the same time enters the buffer groove 124 through the reflux hole 128 on the end wall of the columnar groove 123, so that all the columnar grooves 123, the buffer groove 124 and the arc-shaped liquid cooling pipe 131 in the octagonal ring frame 121 are filled with coolant, thereby cooling the arc-shaped silicon steel sheet 13 0 for heat dissipation, and at the same time, the heated coolant in the octagonal ring frame 121 can enter the water pipe 104 and the water outlet branch 108 through the guide hole 125, and then be discharged from the water outlet main pipe 107, thereby realizing the circulation of the coolant in the octagonal ring frame 121. When the temperature in the arc coil 115 increases, the coolant in the octagonal ring frame 121 and the arc-shaped silicon steel sheet 130 can both cool the arc coil 115. At the same time, the circulating coolant can also dissipate heat for the arc-shaped silicon steel sheet 130, thereby reducing the influence of the temperature of the inner furnace body 230 on the magnetic field generated by the arc coil 115.

[0046] As an implementation method in this embodiment, Figure 5 and Figure 6As shown, pillars 102 are fixedly installed on both sides of the top of the displacement platform 101, and the displacement platform 101 is supported by the pillars 102. Both groups of pillars 102 slide through the bottom of the outer shell 200, and the tops of the two groups of pillars 102 are respectively fixedly connected to the two sides of the octagonal ring frame 121, and the pillars 102 are supported by the octagonal ring frame 121. The same support plate 103 is fixedly installed in the middle of the two groups of pillars 102 located inside the outer shell 200, and a water pipe 104 is fixedly installed on the outer side of the top of the support plate 103. There are eight groups of water pipes 104, which are set as hard water pipes and are sealed and connected with the corresponding eight groups of guide holes 125. The water pipe 104 is connected with the corresponding cache slot 124, and the four non-adjacent groups of water pipes 104 are respectively sealed and connected with the corresponding four groups of connecting pipes 127 ports.

[0047] A water inlet pipe 105 and a water outlet pipe 107 are fixedly installed on both sides of the top of the displacement platform 101. The water inlet pipe 105 and the water outlet pipe 107 are made of hard water pipes, and both the water inlet pipe 105 and the water outlet pipe 107 pass through the displacement platform 101. The water inlet pipe 105 and the water outlet pipe 107 are slidably passed through the bottom of the outer shell 200, and the water inlet pipe 105 and the water outlet pipe 107 are respectively connected to the water inlet pipe and the water outlet pipe. Four groups of water inlet branches 106 are sealed and fixedly connected to the outside, and the four groups of water inlet branches 106 are sealed and connected to the ports of the water pipes 104 connected to the four groups of connecting pipes 127 respectively. Four groups of water outlet branches 108 are sealed and fixedly connected to the outside of the top of the water outlet main pipe 107, and the four groups of water outlet branches 108 are sealed and connected to the ports of another four groups of water pipes 104 respectively. The water outlet branches 108 and the water inlet branches 106 are both hoses, which can be deformed during the movement of the displacement platform 101.

[0048] In this embodiment, if Figures 2 to 4As shown, a cylinder 210 is fixedly installed on the top of the outer shell 200, and the output end of the cylinder 210 is fixedly connected to the top of the displacement stage 101. The cylinder 210 can push the displacement stage 101 to move up and down, thereby changing the distance between the magnetocaloric component 110 and the bottom of the inner furnace body 230. An inner layer 220 is provided inside the outer shell 200, and a spiral coil 221 is clamped on the inner wall of the inner layer 220. The spiral coil 221 can perform electromagnetic heating on the shaping surface of the side wall of the inner furnace body 230, and the spiral coil 221 and the arc coil 115 are both connected to the external power supply. The inner furnace body 230 is fixedly installed on the inner wall of the outer shell 200, and the center line weight of the inner furnace body 230 and the spiral coil 221 is 1 / 40. The arc surface on the inner furnace body 230 is located inside the magnetic cover formed by the arc coil 115 and the arc claw strip 112. In the present invention, when the profiled surface of the workpiece heats up too quickly and far exceeds the shaping surface of the workpiece, the cylinder 210 is driven to drive the output end thereof to move the displacement table 101 downward, and the connection between the two groups of pillars 102 drives the octagonal ring frame 121 and the magnetocaloric component 110 downward, so that the distance between the profiled surface on the inner furnace body 230 and the magnetic cover increases. At this time, the magnetic flux passing through the profiled surface on the inner furnace body 230 is reduced, so that the induced current generated inside is reduced, resulting in a reduction in the heat generated on its surface, so that its annealing rate is the same as the annealing rate of the shaping surface of the workpiece.

[0049] The working principle of the technical solution provided by the present invention is as follows:

[0050] The strip steel workpiece with the irregular surface is placed on the external conveyor belt and passed through the inner furnace body 230. A low-frequency and high-voltage alternating current (220 volts, alternating current between 20 and 30 Hz) is introduced into the arc coil 115 and the spiral coil 221 through an external power supply. At this time, an alternating magnetic field is generated around the arc coil 115 and the spiral coil 221. Under the action of the alternating magnetic field, the magnetic flux passing through the inner furnace body 230 keeps changing. Based on the eddy current effect, a large amount of heat is generated in the inner furnace body 230. In order to uniformly anneal the profiled surface of the strip workpiece, the profiled surface of the workpiece should be fitted with the profiled surface on the inner furnace body 230, and the profiled surface on the inner furnace body 230 should be located in the magnetic cover formed by the arc coil 115 and the arc claw strip 112. However, since the magnetic field generated by the arc coil 115 is more concentrated than the magnetic field generated by the spiral coil 221, the profiled surface of the inner furnace body 230 located in the magnetic cover heats up faster. In order to control the annealing rate of the workpiece surface to be the same, the magnetic field generated by the arc coil 115 needs to be timely regulated.

[0051] When the profiled surface of the workpiece heats up too quickly and far exceeds the reshaped surface of the workpiece, the cylinder 210 is driven so that its output end drives the translation table 101 to move downward, and through the connection of the two sets of pillars 102, the octagonal ring frame 121 and the magnetocaloric component 110 are driven downward, so that the distance between the profiled surface on the inner furnace body 230 and the magnetic cover increases. At this time, the magnetic flux passing through the profiled surface on the inner furnace body 230 is reduced, so that the induced current generated inside is reduced, resulting in a reduction in the heat generated on its surface, so that its annealing rate is the same as the annealing rate of the reshaped surface of the workpiece.

[0052] When the inner furnace body 230 heats up rapidly due to electromagnetic induction, the heat will be transferred to the arc coil 115. If the arc coil 115 is energized, the magnetic field generated by it will be disturbed. When the temperature of the arc coil 115 rises, the magnetic moment of the magnetic field generated by it will change, resulting in a decrease in the intensity of the generated magnetic field. At this time, by introducing cooling liquid into the water inlet main pipe 105, the cooling liquid enters the connecting pipe 127 through the four groups of water inlet branches 106 and the water guide pipe 104, and then enters the cylindrical groove 123 through the connecting pipe 127. Thereafter, it refluxes to the buffer groove 124 through the reflux hole 128, and then enters the adjacent cylindrical groove 123 in the octagonal ring frame 121 through the arc liquid cooling pipe 131, and at the same time, it flows out through the reflux hole 12 8 enters into the buffer groove 124, so that all the column grooves 123, the buffer grooves 124 and the arc-shaped liquid cooling tubes 131 in the octagonal ring frame 121 are filled with coolant, thereby dissipating the heat of the arc-shaped silicon steel sheet 130. At the same time, the heated coolant in the octagonal ring frame 121 can enter the water pipe 104 and the water outlet branch 108 through the guide hole 125, and then be discharged from the water outlet main pipe 107, thereby realizing the circulation of the coolant in the octagonal ring frame 121. When the temperature in the arc-shaped coil 115 rises, the coolant in the octagonal ring frame 121 and the arc-shaped silicon steel sheet 130 can both cool the arc-shaped coil 115. At the same time, the circulating coolant can also dissipate heat for the arc-shaped silicon steel sheet 130, thereby reducing the influence of the temperature of the inner furnace body 230 on the magnetic field generated by the arc-shaped coil 115.

[0053] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An electromagnetic annealing furnace, comprising a bottom magnetic control device and an outer shell, wherein the bottom magnetic control device is located inside the outer shell and penetrates the bottom of the top shell of the outer shell, characterized in that: The bottom magnetic control device comprises a displacement platform, the displacement platform is located on the inner side of the top of the outer shell, a liquid cooling component is provided at the bottom of the displacement platform, the liquid cooling component is located inside the outer shell, and a magnetothermal component is provided inside the liquid cooling component; The magnetocaloric component comprises a limiting column, and an arc-shaped claw strip is fixedly installed on the side wall of the limiting column. The arc-shaped claw strip is provided with four groups, and two adjacent groups of arc-shaped claw strips are spaced 90 degrees apart. The connection between the four groups of arc-shaped claw strips and the limiting column is vertically arranged. The side wall of the arc-shaped claw strip is inlaid with a plurality of resistor blocks. The plurality of groups of resistor blocks located on the same arc-shaped claw strip are divided into three areas on the arc-shaped claw strip, and the number of the resistor blocks in the three areas is the same. The plurality of groups of resistor blocks on the four groups of arc-shaped claw strips correspond to each other one by one. The corresponding end walls of the resistor blocks on the two adjacent groups of arc-shaped claw strips are fixedly installed with the same arc-shaped coil, and a magnetic cover is formed between the plurality of groups of arc-shaped coils and the arc-shaped claw strips. The liquid cooling assembly includes an octagonal ring frame, a receiving hole is opened in the middle of the top of the octagonal ring frame, the outer wall of the limit column is fixedly connected to the receiving hole, the outer end walls of the four groups of arc-shaped claw strips are fixedly connected to the inner wall of the octagonal ring frame, and the eight groups of claw arms in the middle of the octagonal ring frame are all provided with cylindrical grooves, and the end walls of the eight groups of claw arms of the octagonal ring frame are all provided with cache grooves; The tops of the ends of the eight groups of claw arms of the eight-claw ring frame are all provided with guide holes, and the guide holes are connected to the inside of the cache slots. The inner walls of the four groups of cache slots that are not adjacent to each other are all fixed with connecting pipes, which penetrate the side walls of the cache slots, and the two ends of the connecting pipes are respectively connected to the inside of the cache slots and the cylindrical slots; The side walls of the eight groups of cache slots are all provided with reflux holes, and the cache slots are connected to the inside of the cylindrical slots through the reflux holes. The reflux holes in the four groups of cache slots equipped with connecting pipes have a smaller diameter than the other four groups of reflux holes. Both sides of the eight groups of claw arms of the eight-claw ring frame are provided with connecting holes, and two groups of the connecting holes are respectively connected to the inside of the columnar groove and the cache groove. An arc-shaped liquid cooling pipe is provided between two adjacent groups of claw arms on the eight-claw ring frame, and the pipe openings at both ends of the arc-shaped liquid cooling pipe are respectively sealed and connected to the corresponding connecting holes on the two groups of claw arms. Multiple groups of arc-shaped silicon steel sheets are provided between two adjacent groups of claw arms on the eight-claw ring frame, and the arc-shaped silicon steel sheets are fixedly connected to the inner wall of the eight-claw ring frame and are evenly distributed between the two adjacent groups of claw arms on the eight-claw ring frame. The arc-shaped liquid cooling pipe is fixedly passed through the corresponding multiple groups of arc-shaped silicon steel sheets, and multiple groups of arc coils and arc-shaped claw strips are in contact with the inner wall of the arc-shaped silicon steel sheet; Pillars are fixedly installed on both sides of the top of the displacement platform, and the two groups of pillars slide through the bottom of the outer shell, and the tops of the two groups of pillars are fixedly connected to the two sides of the octagonal ring frame respectively, and the same support plate is fixedly installed in the middle of the two groups of pillars located inside the outer shell, and water pipes are fixedly installed on the outer side of the top of the support plate. There are eight groups of water pipes, and they are sealed and connected with the corresponding eight groups of guide holes. The water pipes are connected with the corresponding cache slots, and the four non-adjacent groups of water pipes are sealed and connected with the corresponding four groups of connecting pipe ports respectively; A water inlet main pipe and a water outlet main pipe are fixedly installed on both sides of the top of the displacement platform, and the water inlet main pipe and the water outlet main pipe both penetrate the displacement platform, and the water inlet main pipe and the water outlet main pipe both slide through the bottom of the outer shell, and the water inlet main pipe and the water outlet main pipe are externally connected to the water inlet pipe and the water outlet pipe respectively, and four groups of water inlet branches are sealed and fixedly connected to the outer side of the top of the water inlet main pipe, and the four groups of water inlet branches are respectively sealed and connected to the water guide pipe ports connected to the four groups of connecting pipes, and four groups of water outlet branches are sealed and fixedly connected to the outer side of the top of the water outlet main pipe, and the four groups of water outlet branches are respectively sealed and connected to the other four groups of water guide pipe ports; By introducing the coolant into the water inlet main pipe, the coolant enters the connecting pipe through four groups of water inlet branches and the water guide pipes, and then enters the cylindrical groove through the connecting pipe. Thereafter, it flows back to the cache groove through the reflux hole, and then enters the adjacent cylindrical groove in the octagonal ring frame through the arc-shaped liquid cooling pipe, and at the same time enters the cache groove through the reflux hole on the end wall of the cylindrical groove, so that all the cylindrical grooves, cache grooves and arc-shaped liquid cooling pipes in the octagonal ring frame are filled with coolant, thereby dissipating the heat of the arc-shaped silicon steel sheets. At the same time, the heated coolant in the octagonal ring frame can enter the water guide pipe and the water outlet branch through the guide hole, and then be discharged from the water outlet main pipe, thereby realizing the circulation of the coolant in the octagonal ring frame.

2. The electromagnetic annealing furnace according to claim 1, characterized in that: A permanent magnet is fixedly mounted on the end wall of the limiting column, and the permanent magnet is located in the middle of a magnetic cover formed by a plurality of groups of arc-shaped coils and arc-shaped claw strips.

3. The electromagnetic annealing furnace according to claim 1, characterized in that: A cylinder is fixedly installed on the top of the outer shell, and the output end of the cylinder is fixedly connected to the top of the displacement platform. An inner layer is opened inside the outer shell, and a spiral coil is clamped on the inner wall of the inner layer, and the spiral coil and the arc coil are both connected to an external power supply.

4. The electromagnetic annealing furnace according to claim 3, characterized in that: The inner furnace body is fixedly mounted on the inner wall of the outer shell, and the inner furnace body coincides with the center line of the spiral coil. The arc surface on the inner furnace body is located inside the magnetic cover formed by the arc coil and the arc claw strip. The inner furnace body wall is coated with a heat preservation layer.

Images