A kind of even temperature function device of general box type tempering furnace when electric heating

Abstract

The application discloses a kind of general box type tempering furnace temperature equalization function device when electric heating, it is related to heat treatment equipment technical field, including furnace body component, and the independent temperature zone component being arranged in the inside of furnace body component, parabolic reflector component, telescopic amount adjusting component and vortex ring generator, independent temperature zone component is divided into multiple single units in the inside of furnace body component, and multiple single units are achieved power and signal transmission by electromagnetic coupling connector, vortex ring generator is arranged in the inside of furnace body component four around, and cooperate with the blade vortex ring flow guide component being arranged in the top of furnace body component, make the eddy current intensity in the inside of furnace body component increase, overall effectively make that energy consumption is reduced in high temperature zone, and low temperature zone thermal efficiency is improved, the temperature equalization performance, energy efficiency ratio and reliability of tempering furnace are significantly improved, effectively dynamic adaptation workpiece shape, so that complex workpiece qualification rate is improved, and production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of heat treatment equipment technology, specifically to a temperature equalization device for a general-purpose box-type tempering furnace under electric heating. Background Technology

[0002] Tempering furnaces are mainly used for tempering quenched metal workpieces, controlling temperature and time to achieve stable mechanical properties (such as hardness, toughness, and fatigue resistance). This equipment is suitable for industrial applications requiring strict temperature uniformity, such as automotive parts, aerospace structural components, and machined parts.

[0003] Currently, traditional tempering furnaces mostly use parallel arrangement of resistance wires on both side walls, resulting in a large temperature difference between the upper and lower layers of the furnace, especially in furnace chambers with a height exceeding 1.5m, where the temperature difference between the top and bottom can exceed 20℃. Alternatively, airflow can be circulated through a top fan or agitator to improve temperature uniformity to ±10℃, but dead zones exist, leading to uneven temperature distribution. Another approach is to use a combination of distribution pipes and exhaust pipes to address localized overheating, but this cannot dynamically adapt to the shape of the workpiece, resulting in a low pass rate for complex workpieces. Furthermore, while some furnace types use 3-5 temperature zones for temperature control, achieving a temperature difference of ±5℃, the temperature zones are fixed and cannot be dynamically adjusted according to the workpiece, making it impossible to match irregularly shaped workpieces (such as turbine blade tenons that require localized high temperatures). This necessitates manual adjustment of shims, which is time-consuming and affects production efficiency. Therefore, there is a need to propose a universal box-type tempering furnace temperature equalization device for electric heating. Summary of the Invention

[0004] The purpose of this invention is to provide a temperature equalization device for a universal box-type tempering furnace under electric heating, in order to solve the problems mentioned in the background art. Traditional tempering furnaces often use parallel arrangement of resistance wires on both side walls, resulting in a large temperature difference between the upper and lower layers of the furnace, especially in furnace chambers with a height exceeding 1.5m, where the temperature difference between the top and bottom can be more than 20°C. Alternatively, airflow can be circulated through a top fan or agitator to improve temperature uniformity to ±10°C, but dead zones exist, leading to uneven temperature. Another approach is to use a combination of a split pipe and an exhaust pipe to address local overheating, but this cannot dynamically adapt to the shape of the workpiece, resulting in a low pass rate for complex workpieces. Furthermore, although some furnace types use 3-5 temperature zones for temperature control, achieving a temperature difference of ±5°C, the temperature zones are fixed and cannot be dynamically adjusted with the workpiece, making it impossible to match irregularly shaped workpieces (such as turbine blade tenons that require localized high temperatures). This necessitates manual adjustment of shims, which is time-consuming and affects production efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a universal box-type tempering furnace temperature equalization device for electric heating, comprising a furnace body assembly, and an independent temperature zone assembly, a parabolic reflector assembly, an expansion adjustment assembly, and a vortex generator installed inside the furnace body assembly. The independent temperature zone assembly divides the interior of the furnace body assembly into multiple units, and the multiple units are connected by an electromagnetic coupling connector to achieve power and signal transmission. The vortex generator is installed around the interior of the furnace body assembly, and in conjunction with the blade vortex guide assembly installed on the top of the furnace body assembly, it increases the vortex intensity inside the furnace body assembly. Multiple sets of electromagnetic coils and coil controllers are installed inside the furnace body assembly to regulate the magnetic field distribution. The parabolic reflector assembly is installed inside the furnace body assembly with adjustable angle to focus thermal radiation. The expansion adjustment assembly is connected to the independent temperature zone assembly to dynamically adjust the boundary size between units.

[0006] The independent temperature zone assembly includes a heating plate, inside which parallel resistance wires are installed. The resistance wires are wrapped with heat-resistant connectors, and a connecting sliding member is connected to one side of each wire. An intermediate sliding groove is installed on the outside of the side of the connecting sliding member. A bidirectional magnetorheological fluid drive is installed inside the intermediate sliding groove to drive the connecting sliding member to slide along the intermediate sliding groove and adjust the spacing between the resistance wires.

[0007] Preferably, the furnace body assembly includes a furnace lining, a parallel resistance heating wire structure is installed inside the furnace lining, a ceramic heating substrate is installed outside the parallel resistance heating wire structure, and the parallel resistance heating wire structure is embedded inside the ceramic heating substrate and arranged in a gradient.

[0008] Preferably, the blade vortex ring guide assembly includes a guide groove, and a double-rotating blade fan is installed inside the guide groove. The double-rotating blade fan consists of an upper impeller and a lower impeller. The upper impeller rotates clockwise, and the lower impeller rotates counterclockwise. The leading edge and trailing edge of the upper impeller and the lower impeller are respectively provided with a serrated shape and a wavy shape.

[0009] Preferably, the telescopic adjustment component includes a mounting component, a heat-resistant telescopic air rod is mounted on the top of the mounting component, a sliding telescopic component is connected to the output end of the heat-resistant telescopic air rod, the bottom end of the sliding telescopic component slides on the surface of the mounting component, a connecting groove is slidably connected to the top of the sliding telescopic component, a heat-resistant sliding cavity is connected to the side end of the connecting groove, the heat-resistant sliding cavity is slidably connected to the side wall surface of the ceramic heating substrate, two electrically driven travel guide rods are symmetrically mounted inside the heat-resistant sliding cavity, a magnetic connector is connected to the side end of the electrically driven travel guide rod, and the magnetic connector drives the parabolic reflector component to slide on the surface of the heat-resistant sliding cavity.

[0010] Preferably, the parabolic reflector assembly includes a magnetic connecting block, a circumferential adjustment drive structure is mounted on the top of the magnetic connecting block, an angle gear adjustment structure is connected to the output center end of the circumferential adjustment drive structure, and a focus positioning mounting cavity is mounted at the end of the angle gear adjustment structure.

[0011] Preferably, a parabolic reflector is installed inside the focal positioning mounting cavity, and the focal positioning mounting cavity is used to make the focal point of the parabolic reflector coincide with the heating area of ​​the independent temperature zone component.

[0012] Preferably, each of the connecting ends of the heating plate is equipped with an adjustment component. The adjustment component includes a horizontal and a vertical connecting frame. The diameter of the horizontal connecting frame towards the middle is larger than the diameter of the connecting frames on the left and right sides. The diameter of the vertical connecting frame towards the middle is larger than the diameter of the connecting frames on the top and bottom sides. A connecting rod is installed inside the connecting frame.

[0013] Preferably, a first guide slide and a second guide slide are respectively installed on the surface of the connecting rod frame, and the first guide slide and the second guide slide slide along the outer wall of the connecting frame.

[0014] Preferably, a furnace cabinet is installed on the side of the furnace body assembly, and a high-frequency induction coil control box is installed at the bottom of the furnace body assembly.

[0015] Preferably, the independent temperature zone component and the adjustment component work together to allow the heating plate to form an adjustable stroke displacement in both the horizontal and vertical directions.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] In this invention, through the cooperation of the furnace body assembly, independent temperature zone assembly, parabolic reflector assembly, telescopic adjustment assembly, vortex ring generator, and adjustment assembly, the telescopic adjustment assembly receives scanning data from the infrared thermal imager. This causes the heat-resistant sliding cavity and its internal structure to drive the independent temperature zone assembly to slide in conjunction with the adjustment assembly. Then, the parabolic reflector assembly activates, focusing on the key heating area marked by the infrared thermal imager. Next, the vortex ring generator and the blade vortex ring guide assembly are activated in tandem, causing the vortex ring generators around the furnace body assembly to generate vortices by jetting airflow at a certain frequency. The uniformity of airflow velocity within the furnace components is improved, and the wind speed in corner areas is increased, eliminating dead zones in the airflow. During this process, multiple sets of electromagnetic coils and coil controllers work continuously, allowing the coil controllers to adjust the magnetic field strength based on the temperature data transmitted in real time from the infrared thermal imager. This, in turn, changes the viscosity of the bidirectional magnetorheological fluid drive component, precisely controlling the sliding resistance of the heating plate. Overall, this effectively reduces energy consumption in the high-temperature zone and improves thermal efficiency in the low-temperature zone, significantly enhancing the uniform temperature performance, energy efficiency ratio, and reliability of the tempering furnace. It also effectively and dynamically adapts to the shape of the workpiece, increasing the pass rate of complex workpieces and improving production efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of a universal box-type tempering furnace temperature equalization device for electric heating according to the present invention;

[0019] Figure 2 This is a schematic diagram of the installation position of the heat-resistant sliding cavity and the electric travel guide rod in a universal box-type tempering furnace temperature equalization device for electric heating according to the present invention.

[0020] Figure 3 This is a schematic diagram of the telescopic adjustment component in a universal box-type tempering furnace temperature equalization device for electric heating according to the present invention.

[0021] Figure 4 This is a schematic diagram of the parabolic reflector component in a universal box-type tempering furnace temperature equalization device for electric heating according to the present invention;

[0022] Figure 5 This is a schematic diagram of the separated structure of the furnace body components in a universal box-type tempering furnace temperature equalization device for electric heating according to the present invention;

[0023] Figure 6 This is a schematic diagram of the independent temperature zone component in a universal box-type tempering furnace temperature equalization device for electric heating according to the present invention;

[0024] Figure 7 This invention relates to a universal box-type tempering furnace temperature equalization device for electric heating. Figure 6 A magnified structural diagram at point A;

[0025] Figure 8This is a schematic diagram of the regulating component in a universal box-type tempering furnace temperature equalization device for electric heating according to the present invention;

[0026] Figure 9 This invention relates to a universal box-type tempering furnace temperature equalization device for electric heating. Figure 8 A magnified structural diagram at point B;

[0027] Figure 10 This is a schematic diagram of the blade vortex ring guide assembly in a universal box-type tempering furnace temperature equalization device for electric heating according to the present invention.

[0028] Figure 11 This invention relates to a universal box-type tempering furnace temperature equalization device for electric heating. Figure 10 A magnified structural diagram at point C.

[0029] In the diagram: 100, Furnace body assembly; 101, Furnace lining; 102, Parallel resistance heating wire structure; 103, Ceramic heating substrate; 200, Furnace cabinet; 300, High-frequency induction coil control box; 400, Blade vortex ring guide assembly; 401, Guide groove; 402, Upper impeller; 403, Lower impeller; 404, Wavy; 405, Serrated; 500, Adjustment assembly; 501, Connecting frame; 502, Connecting rod frame; 503, First guide slide; 504, Second guide slide; 600, Telescopic adjustment assembly; 601, Mounting component; 602, Heat-resistant telescopic component. 603. Gas measuring rod; 604. Sliding telescopic component; 705. Connecting groove component; 706. Parabolic reflector assembly; 707. Magnetic connecting block; 708. Circumferential adjustment drive structure; 709. Focal point positioning mounting cavity; 700. Parabolic reflector cover; 700. Angle gear adjustment structure; 800. Heat-resistant sliding cavity; 900. Electric stroke guide rod; 110. Magnetic connecting component; 120. Independent temperature zone assembly; 121. Resistance wire; 122. Heat-resistant connecting component; 123. Intermediate sliding groove component; 124. Bidirectional magnetorheological fluid drive component; 125. Connecting sliding joint component; 130. Vortex ring generator. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In an embodiment of the present invention, reference is made to Figure 1As shown: A universal box-type tempering furnace temperature equalization device for electric heating includes a furnace body assembly 100 and an independent temperature zone assembly 120, a parabolic reflector assembly 700, an extension / retraction adjustment assembly 600, and a vortex ring generator 130 installed inside the furnace body assembly 100. The independent temperature zone assembly 120 divides the interior of the furnace body assembly 100 into multiple units, and the multiple units are connected by an electromagnetic coupling connector to achieve power and signal transmission. The vortex ring generator 130 is installed around the interior of the furnace body assembly 100 and, in conjunction with the blade vortex ring guide assembly 400 installed on the top of the furnace body assembly 100, increases the eddy current intensity inside the furnace body assembly 100. Multiple sets of electromagnetic coils and coil controllers are installed inside the furnace body assembly 100 to regulate the magnetic field distribution. The parabolic reflector assembly 700 is installed inside the furnace body assembly 100 with adjustable angle to focus thermal radiation. The extension / retraction adjustment assembly 600 is connected to the independent temperature zone assembly 120 to dynamically adjust the boundary size between units.

[0032] Specifically: When the device is connected to the power supply and started, the infrared thermal imager (installed on the furnace top) inside the furnace body assembly 100 is automatically turned on to perform a 360° non-contact scan of the furnace space. At this time, the independent temperature zone assembly 120 is in the initial unfolded state, and the heating plates can be distributed in a matrix (such as between 3×3 units) through the adjustment assembly 500, so that each unit can maintain power and signal connection through the electromagnetic coupling connector, which makes it easy for the infrared thermal imager to quickly identify the workpiece loading position and initial temperature distribution, and mark potential high temperature areas (such as the edge of the workpiece) or low temperature areas (such as near the furnace door).

[0033] Next, the telescopic adjustment component 600 receives the scanning data from the infrared thermal imager, which will drive the heat-resistant sliding cavity 800 and the internal structure driving independent temperature zone component 120 to slide in cooperation with the adjustment component 500. For example, if the temperature on the left side of the workpiece is detected to be too low, the left heating plate unit will slide towards the workpiece to reduce the boundary of the left temperature zone and concentrate the heating power. At this time, the electromagnetic coupling connector moves with the heating plate to keep the circuit connected and avoid power failure.

[0034] Then, the parabolic reflector assembly 700 starts to operate, focusing on the key heating area marked by the infrared thermal imager. For example, when the workpiece is a gear, the parabolic reflector 704 will focus on the root of the gear, enhancing the local heating efficiency through thermal radiation reflection and ensuring precise thermal radiation coverage.

[0035] Next, the vortex ring generator 130 and the blade vortex ring guide assembly 400 are activated in tandem, causing the vortex ring generator 130 around the furnace body assembly 100 to generate vortex rings by jetting air at a certain frequency. At the same time, the top counter-rotating centrifugal fan pushes the vortex rings downward to form a three-dimensional vortex field. This facilitates the improvement of vortex intensity, while also improving the uniformity of airflow velocity within the furnace body assembly 100, increasing the wind speed in corner areas, and eliminating dead zones in the airflow.

[0036] During this process, multiple sets of electromagnetic coils and coil controllers work continuously, so that the coil controllers adjust the magnetic field strength according to the temperature data transmitted back in real time by the infrared thermal imager, thereby changing the viscosity of the bidirectional magnetorheological fluid drive component 124 and precisely controlling the sliding resistance of the heating plate. For example, when the temperature of a certain temperature zone is close to the set value, the magnetic field weakens, the viscosity of the magnetorheological fluid decreases, the sliding resistance of the heating plate decreases, and it is convenient to fine-tune the boundary position.

[0037] Meanwhile, the external predictive controller can predict and analyze the subsequent temperature change trend. If it is predicted that a certain part of the workpiece will overheat, the external predictive controller will instruct the parabolic reflector 704 to deflect in advance to reduce the heat radiation input in that area, while increasing the airflow velocity in the corresponding temperature zone. Through forced convection heat dissipation, it can achieve forward-looking temperature control.

[0038] When the temperature inside the furnace body assembly 100 reaches the set value and enters the heat preservation stage, the independent temperature zone assembly 120 enters the dynamic maintenance mode, which allows the heating plate to automatically adjust the size of the zone according to the heat conduction characteristics of the workpiece. For example, for high carbon steel workpieces with poor thermal conductivity, the temperature zone boundary will be appropriately expanded to avoid local heat accumulation; for aluminum alloy workpieces, the temperature zone will be reduced to concentrate heat and compensate for its high heat dissipation rate.

[0039] During this period, the parabolic reflector 700 continuously tracks the thermal center of the workpiece. If the heat absorption rate of the workpiece changes due to the phase change of heat treatment, the parabolic reflector 704 will automatically adjust the focal position to ensure that the heat radiation is always focused on the area with the largest temperature gradient. For example, during the tempering of gears, the phase change heat absorption of the tooth surface and the tooth root is different, which causes the parabolic reflector 704 to dynamically switch the focal point so that the temperature difference between the two is kept within a certain range.

[0040] After the tempering process is completed, the overall staged cooling program can be started. First, the parabolic reflector 704 rotates to a vertical position to stop the focusing of heat radiation. Then, the heating plate retracts to its initial position under the drive of the telescopic adjustment component 600. The power connection between each unit is disconnected through the electromagnetic coupling connector to reduce standby power consumption. Meanwhile, the vortex generator 130 switches to strong wind mode to accelerate the cooling inside the furnace body component 100. At the same time, the blade vortex guide component 400 adjusts the angle of the guide groove to guide the airflow through the workpiece surface and avoid the generation of new temperature gradients during the cooling process.

[0041] In some embodiments, according to Figure 1 , Figure 6 and Figure 7As shown, the independent temperature zone component 120 includes a heating plate, inside which parallel resistance wires 121 are installed. A fiber optic grating sensor is embedded on the surface of the heating plate for real-time monitoring of temperature changes at the temperature zone boundaries. The resistance wires 121 employ a core-shell structure with a nickel-chromium alloy core and a graphene shell. The graphene shell can be prepared using CVD, and a vertically aligned array of carbon nanotubes is grown on its surface, enhancing the surface emissivity of the resistance wires 121. A heat-resistant connector 122 is installed on the surface of the resistance wires 121. The side end of 22 is connected to a connecting sliding member 125. An intermediate sliding groove 123 is installed on the outside of the side end of the connecting sliding member 125. A bidirectional magnetorheological fluid drive 124 is installed inside the intermediate sliding groove 123. Under the control of multiple sets of electromagnetic coils and coil controllers, the bidirectional magnetorheological fluid drive 124 drives the connecting sliding member 125 to extend and retract along the internal sliding groove of the intermediate sliding groove 123, thereby driving the heat-resistant connecting members 122 and resistance wires 121 on both sides to move, forming an extension and retraction adjustment, and adjusting the spacing between the resistance wires 121.

[0042] In the embodiments of the present invention, specifically: First, when the electric heating box tempering furnace is powered on and started, that is, when the temperature inside the furnace rises to 50% of the set value, the fiber optic grating sensor enters the high-frequency sampling mode to monitor the temperature changes of the surface of the resistance wire 121 and the temperature zone boundary in real time. For example, if the workpiece in a certain area absorbs heat faster due to material differences, the temperature of the resistance wire 121 in that area will rise rapidly. The fiber optic grating sensor captures the temperature fluctuations in real time through wavelength drift and transmits the data to the external central controller and the external predictive controller.

[0043] After receiving temperature data, the external central controller instructs the coil controller to adjust the magnetic field strength of the electromagnetic coil in the corresponding area. This causes the viscosity of the magnetorheological fluid in the bidirectional magnetorheological fluid drive component 124 to increase sharply under the action of the magnetic field, generating shear force to drive the connecting sliding member 125 to extend and retract along the slide groove. For example, when the temperature of a certain temperature zone exceeds the set value (e.g., exceeding 3°C), the coil controller increases the magnetic field (e.g., increases it by 0.5T), causing the viscosity of the magnetorheological fluid inside the bidirectional magnetorheological fluid drive component 124 to increase. This pushes the connecting sliding member 125 to move the resistance wire 121 outward, increasing the spacing between the resistance wires 121 and reducing the heating power density in that area.

[0044] While the spacing of resistance wires 121 is adjusted, the core-shell structure of the nickel-chromium alloy core and the graphene shell works synergistically: the vertical carbon nanotube array on the surface of the graphene shell increases the surface area, thereby improving the thermal radiation emissivity and ensuring that the thermal radiation efficiency does not decrease after the spacing of resistance wires 121 is increased. At the same time, the nickel-chromium alloy core maintains high conductivity, so that even when the spacing of resistance wires 121 is increased, the overall resistance of resistance wires 121 is kept within a certain safe range to avoid current overload.

[0045] Then, when the spacing of the resistance wires 121 is adjusted, the temperature zone boundary is dynamically reconstructed. For example, when the tooth root area of ​​the gear workpiece needs to be heated, the spacing of the resistance wires 121 in the corresponding temperature zone is reduced, the heat flux density is increased, and the parabolic reflector component 700 focuses the heat radiation on the area, forming a dual enhancement of the spacing adjustment of the resistance wires 121 and the focusing of heat radiation, so that the temperature difference between the tooth root and the tooth surface is small.

[0046] After entering the heat preservation stage, the entire system switches to low-frequency regulation mode. The fiber optic grating sensor monitors the minute fluctuations (such as ±1℃) in the temperature of the resistance wire 121 in real time. The coil controller drives the bidirectional magnetorheological fluid drive 124 through a pulsed magnetic field, causing the resistance wire 121 to produce a micro-displacement, compensating for temperature fluctuations caused by thermal inertia. For example, when the temperature overshoots during the heat preservation stage, the spacing between the resistance wires 121 increases instantaneously, promptly pulling the temperature back within the set range.

[0047] By dynamically adjusting the spacing of the resistance wires 121, the overall power can be precisely allocated according to the real-time heat demand. This means that the spacing of the resistance wires 121 in the high-temperature zone is increased to reduce ineffective heating and thus reduce energy consumption, while the spacing of the resistance wires 121 in the low-temperature zone is reduced to concentrate heat supply and thus improve thermal efficiency.

[0048] After the tempering process is completed, the coil controller gradually reduces the magnetic field to 0, the viscosity of the magnetorheological fluid returns to its initial value, and the connecting sliding member 125 drives the resistance wire 121 back to the initial spacing under the action of the magnetorheological fluid. At the same time, the heat-resistant connecting member 122 releases thermal stress to prevent the resistance wire 121 from undergoing plastic deformation due to thermal expansion and contraction, ensuring that the graphene shell of the core-shell structure is free from cracking.

[0049] The overall independent temperature zone component 120 monitors the temperature in real time through a fiber optic grating sensor. Combined with the nickel-chromium alloy core and graphene core-shell structure of the resistance wire 121 and the bidirectional magnetorheological fluid drive component 124, it achieves dynamic reconstruction of the temperature zone boundary and precise distribution of heat power. When the temperature in a certain area is abnormal, the temperature difference range can be effectively controlled by adjusting the spacing of the resistance wire 121 and the reflection and focusing of the parabolic reflector 704. The micro-displacement compensation during the heat preservation stage keeps the temperature fluctuation low. Overall, it effectively reduces energy consumption in the high-temperature zone and improves thermal efficiency in the low-temperature zone, significantly improving the uniform temperature performance, energy efficiency ratio and reliability of the tempering furnace.

[0050] In some embodiments, according to Figure 1 , Figure 2 and Figure 5As shown, the furnace body assembly 100 includes a furnace body and a furnace lining 101. A parallel resistance heating wire structure 102 is installed inside the furnace lining 101. The parallel resistance heating wire structure 102 is also controlled by a heat-resistant connector 122, a connecting sliding member 125, an intermediate sliding groove member 123, and a bidirectional magnetorheological fluid drive member 124. A ceramic heating substrate 103 is installed outside the parallel resistance heating wire structure 102. The parallel resistance heating wire structure 102 is embedded inside the ceramic heating substrate 103 and arranged in a gradient. A gradually expanding flow guide groove is opened on the side wall surface of the ceramic heating substrate 103. The gradually expanding flow guide groove, together with the built-in adjustable louvers, is used to automatically adjust the airflow path according to the loading density to ensure the uniformity of airflow when the workpieces are dense.

[0051] In the embodiments of the present invention, specifically: as described in the independent temperature zone component 120 above, when the furnace temperature rises to 50% of the set value, the parallel resistance heating wire structure 102 enters the dynamic adjustment mode. If the workpiece in a certain area absorbs heat faster due to high loading density, the fiber optic grating sensor in that area detects an abnormal temperature in the parallel resistance heating wire structure 102. The external central controller instructs the coil controller to enhance the magnetic field of the corresponding electromagnetic coil, causing the viscosity of the magnetorheological fluid in the bidirectional magnetorheological fluid drive component 124 to increase sharply, pushing the connecting sliding component 125 to move the resistance heating wire outward, increasing the spacing between the resistance heating wires in the parallel resistance heating wire structure 102, and reducing the heating power density. Conversely, the spacing between the resistance heating wires in the low-temperature area decreases, concentrating the heat supply.

[0052] While adjusting the spacing of the resistance heating wires, the gradient layout of the ceramic heating substrate 103 results in a high density of resistance heating wires in the central area of ​​the furnace cavity. Combined with the high-radiation coating of the ceramic heating substrate 103, the dense area of ​​workpieces is heated first, while the density of resistance heating wires in the edge area is low. The thermal conductivity of the ceramic heating substrate 103 evenly conducts heat, avoiding overheating at the edges.

[0053] In addition, the gradually expanding guide channel on the surface of the ceramic substrate (the inlet width is smaller than the outlet width) automatically adjusts the angle of the built-in louvers (0-90°) according to the loading density detected by the infrared thermal imager. For example, when the loading exceeds 70%, the louver angle is adjusted to 60° to guide the airflow to accelerate along the gradually expanding channel and ensure that the wind speed in the edge area is maintained at 80% of that in the center area.

[0054] As the workpiece temperature rises, the airflow resistance inside the furnace changes due to the change in the workpiece shape. The linkage between the gradually expanding guide channel and the louvers creates the following operation: In the initial stage of heating, the louvers are fully open (90°), and the airflow flows in a straight line along the gradually expanding guide channel, quickly establishing a vortex field. In the middle stage of heating, based on the temperature gradient fed back by the fiber optic sensor, the louvers are adjusted to 45°, causing the airflow to form a spiral vortex and enhancing thermal convection. Then, in the heat preservation stage, the louvers are slightly opened (20°) to reduce airflow disturbance and maintain a stable temperature field.

[0055] Then, during the heat preservation stage, the parallel resistance heating wire structure 102 switches to low-frequency adjustment mode, which allows the coil controller to drive the micro-displacement of the resistance heating wire through the pulse magnetic field to compensate for the temperature fluctuation caused by thermal inertia.

[0056] After the tempering process is completed, the coil controller gradually reduces the magnetic field to 0T, the viscosity of the magnetorheological fluid returns to its initial value, and the resistance heating wire returns to its initial spacing under the action of the reset spring. At this time, the heat insulation layer of the furnace lining 101 slowly releases heat, and the thermal conductivity of the ceramic heating substrate 103 causes the temperature gradient to decrease gradually, avoiding internal stress caused by rapid cooling of the workpiece. At the same time, the louvers of the gradually expanding guide channel are fully opened, accelerating the air replacement in the furnace and increasing the cooling speed.

[0057] In some embodiments, according to Figure 1 , Figure 10 and Figure 11 As shown, the blade vortex ring guide assembly 400 includes a guide groove 401. A double-rotating blade fan is installed inside the guide groove 401. The double-rotating blade fan consists of an upper impeller 402 and a lower impeller 403. The upper impeller 402 rotates clockwise, and the lower impeller 403 rotates counterclockwise. The leading edge and trailing edge of the upper impeller 402 and the lower impeller 403 are respectively provided with a serrated 405 and a wavy 404. The blade surfaces of the upper impeller 402 and the lower impeller 403 can be etched with microgrooves.

[0058] In an embodiment of the present invention, specifically: when the furnace temperature rises to 50% of the set value, the double-rotor fan enters the operating state. At this time, the upper impeller 402 rotates clockwise to generate an upward centrifugal force, while the lower impeller 403 rotates counterclockwise to generate a downward centrifugal force. The two superimpose to form a three-dimensional vortex field in the vertical direction. The leading edge of the serrated 405 cuts the intake airflow into multiple small-scale vortices. These vortices interact with the large vortex ring discharged from the trailing edge of the wave-shaped 404 to form a nested structure of "large vortex inside small vortex", which improves the uniformity of the airflow velocity in the furnace and completely eliminates the dead zone of the airflow.

[0059] As the workpiece temperature rises, the overall system dynamically adjusts the speed of the dual-rotor fan based on the temperature field data fed back by the infrared thermal imager, through an external frequency converter. For example, when the temperature deviation in a certain area is detected to exceed 3°C, the speed of the dual-rotor fan increases by 10%, the vortex generation frequency increases, and the thermal convection in that area is enhanced. At this time, the segmentation effect of the serrated leading edge of 405 is further strengthened, so that the new airflow is quickly broken into micro-vortices, avoiding the increase in turbulent noise caused by the increase in speed (while the silencing effect of the wavy trailing edge of 404 can suppress the noise increment).

[0060] Simultaneously, while the blade vortex ring guide assembly 400 is working, it effectively cooperates with the independent temperature zone assembly 120 and the parabolic reflector assembly 700. This ensures that when the independent temperature zone assembly 120 adjusts the spacing of the resistance wires 121, the blade vortex ring guide assembly 400, in conjunction with the vortex ring generator 130, adjusts the position of the vortex ring to ensure that thermal convection covers the new temperature zone boundary. Meanwhile, the parabolic reflector assembly 700 focuses on the area of ​​thermal radiation, and the blade vortex ring guide assembly 400 enhances the airflow speed in that area. By forcing convection to accelerate heat transfer, the heat loss from thermal radiation and convection is balanced, thus avoiding local overheating.

[0061] After entering the heat preservation stage, the blade vortex ring guide assembly 400 switches to a low-frequency working mode (i.e., the speed is reduced), which reduces the vortex ring generation frequency. At this time, the airflow boundary layer effect on the surface of the microgroove is more significant. By maintaining weak vortex disturbance, the uniformity of the furnace temperature is ensured, and the energy consumption of the dual-rotary blade fan is reduced.

[0062] After the tempering process is completed, the blade vortex ring guide assembly 400 operates at full speed, and the speed difference between the upper impeller 402 and the lower impeller 403 increases, forming a strong vortex field. The sawtooth leading edge 405 quickly cuts the outside cold air into micro vortices, which mix with the hot air in the furnace and are discharged through the guide groove 401, improving the cooling efficiency. At the same time, the turbulence effect of the wave-shaped trailing edge 404 prevents airflow blockage at the exhaust port, ensuring that the air exchange volume reaches many times the furnace cavity volume, thus shortening the furnace temperature drop time.

[0063] In some embodiments, according to Figures 1-3 As shown, the telescopic adjustment component 600 includes a mounting component 601. A heat-resistant telescopic air rod 602 is mounted on the top of the mounting component 601. A sliding telescopic component 603 is connected to the output end of the heat-resistant telescopic air rod 602. The bottom end of the sliding telescopic component 603 slides on the surface of the mounting component 601. A connecting groove 604 is slidably connected to the top of the sliding telescopic component 603. A heat-resistant sliding cavity 800 is connected to the side end of the connecting groove 604. The heat-resistant sliding cavity 800 is slidably connected to the side wall surface of the ceramic heating substrate 103. Two electric travel guide rods 900 are symmetrically installed inside the heat-resistant sliding cavity 800. A magnetic connector 110 is connected to the side end of the electric travel guide rod 900. The magnetic connector 110 drives the parabolic reflector component 700 to slide on the surface of the heat-resistant sliding cavity 800. A displacement sensor is installed inside the magnetic connector 700 to monitor the sliding displacement of the heating plate in real time and feed it back to the coil controller.

[0064] In an embodiment of the present invention, specifically: when the furnace temperature rises to 50% of the set value, the spacing of the resistance wires 121 of the independent temperature zone component 120 begins to dynamically adjust, simultaneously triggering the telescopic adjustment component 600 to operate. If the heating plate of the independent temperature zone component 120 slides to the right, the external central controller issues a command to inflate and pressurize the heat-resistant telescopic air rod 602, pushing the sliding telescopic component 603 to slide upward a corresponding distance. The connecting groove 604 drives the heat-resistant sliding cavity 800 to move synchronously to the right along the surface of the ceramic heating substrate 103, and the electric travel guide rod 900 extends synchronously within it, pulling the parabolic reflector component 700 through the magnetic connector 110. Sliding along the surface of the heat-resistant sliding cavity 800, the focal point is re-aligned with the new boundary position of the heating plate. During the adjustment process, the displacement sensor installed inside the connecting frame 501 continuously monitors the vertical displacement of the sliding telescopic component 603 and the horizontal displacement of the heat-resistant sliding cavity 800. When the sliding error exceeds the threshold, the displacement sensor sends a correction signal to the external central controller, so that the electric travel guide rod 900 compensates for the deviation through micro-extension and extension, ensuring the focal positioning accuracy of the parabolic reflector 704. For example, when the heating plate is displaced due to thermal expansion, the displacement sensor provides real-time feedback, and the electric travel guide rod 900 automatically shortens to maintain the focal stability of the parabolic reflector 704.

[0065] After entering the heat preservation stage, the expansion adjustment component 600 switches to the low-frequency fine adjustment mode, so that the displacement sensor monitors the thermal expansion displacement of the heating plate at a low frequency. The external central controller commands the heat-resistant expansion air rod 602 to perform micro-expansion and contraction of the same amplitude. The heat-resistant sliding cavity 800 is pushed to move slightly through the connecting groove 604 to ensure that the focus of the reflector is adjusted synchronously with the thermal deformation of the heating plate.

[0066] The electric travel guide rod 900, in conjunction with the magnetic connector 110, enables fine-tuning of the reflector's angle, compensating for thermal radiation focusing deviations and maintaining temperature uniformity.

[0067] After the tempering process is completed, the expansion adjustment component 600 performs a reset process.

[0068] In some embodiments, according to Figure 1 , Figure 2 and Figure 4As shown, the parabolic reflector assembly 700 includes a magnetic connecting block 701. A circumferential adjustment drive structure 702 is mounted on the top of the magnetic connecting block 701. An angle gear adjustment structure 705 is connected to the output center end of the circumferential adjustment drive structure 702. The angle gear adjustment structure 705 can rotate from 0° to 120°. A focal positioning mounting cavity 703 is mounted at the end of the angle gear adjustment structure 705. A parabolic reflector 704 is mounted inside the focal positioning mounting cavity 703. The focal positioning mounting cavity 703 is used to align the focal point of the parabolic reflector 704 with the heating area of ​​the independent temperature zone assembly 120. A piezoelectric ceramic actuator is mounted inside the focal positioning mounting cavity 703 to finely adjust the focal position of the parabolic reflector 704 and compensate for minor errors in mechanical transmission.

[0069] In an embodiment of the present invention, specifically: when the heating plate of the independent temperature zone assembly 120 shifts due to the heating requirements of the workpiece, the external central controller instructs the circumferential adjustment drive structure 702 to operate, causing the circumferential adjustment drive structure 702 to rotate and adjust, and the angle gear adjustment structure 705 to rotate (maximum adjustment angle 120°), for example, deflecting 15° to the right, so that the focal point of the parabolic reflector 704 moves with the new position of the heating plate.

[0070] After the circumferential adjustment drive structure 702 and the angle gear adjustment structure 705 are adjusted, the piezoelectric ceramic actuator in the focus positioning mounting cavity 703 plays a key role. That is, if the infrared thermal imager detects a large temperature deviation at the edge of the focus area, or if the displacement sensor reports an error in the mechanical transmission, the piezoelectric ceramic actuator applies voltage to generate a micro-displacement, thereby finely adjusting the angle ± of the parabolic reflector 704 to eliminate focusing deviations caused by gear backlash or thermal expansion. For example, when the heating plate undergoes a 0.2mm thermal expansion displacement due to a high temperature of 600℃, the piezoelectric ceramic actuator automatically compensates for the angle of the parabolic reflector 704 to ensure that the focus always falls on the center of the effective area of ​​the heating plate.

[0071] When the independent temperature zone component 120 achieves heat flux density change through the adjustment of the resistance wire 121 spacing (such as when the spacing of the resistance wire 121 in the low temperature zone decreases), the parabolic reflector component 700 simultaneously enhances the thermal radiation of the area: that is, the angle gear adjustment structure 705 rotates to the target angle so that the focal point of the parabolic reflector 704 covers the dense area of ​​the resistance wire 121, ensuring that the temperature of the local low temperature zone of complex workpieces (such as molds with blind holes) quickly reaches the standard.

[0072] Once the heat preservation stage begins, the circumferential adjustment drive structure 702 switches to low-frequency fine-tuning mode.

[0073] After the tempering process is completed, the parabolic reflector component 700 performs a reset operation.

[0074] In some embodiments, according to Figure 1, Figure 8 and Figure 9 As shown, each end of the heating plate is equipped with an adjustment component 500. The adjustment component 500 includes a horizontal and a vertical connecting frame 501. The diameter of the horizontal connecting frame 501 towards the middle is larger than the diameter of the connecting frames 501 on the left and right sides. The diameter of the vertical connecting frame 501 towards the middle is larger than the diameter of the connecting frames 501 on the top and bottom sides. A connecting rod bracket 502 is installed inside the connecting frame 501.

[0075] A first guide slide 503 and a second guide slide 504 are respectively installed on the surface of the connecting rod frame 502. The first guide slide 503 and the second guide slide 504 slide along the outer wall of the connecting frame 501.

[0076] In an embodiment of the present invention, specifically: when the independent temperature zone component 120 needs to adjust the spacing of the resistance wires 121 (e.g., the gear tooth root area needs enhanced heating), the extension adjustment component 600 drives the heat-resistant sliding cavity 800 to move, thereby driving the push connecting rod frame 502 to slide to one side.

[0077] When the horizontal displacement occurs, the connecting rod 502 drives the first guide slide 503 on the left to slide along the outer wall of the left connecting frame 501. Because the diameter of the middle frame is larger, the stroke can be extended, which reduces the spacing between the left units and increases the heat flux density.

[0078] When displaced in the vertical direction, the second guide slide 504 slides upward along the outer wall of the intermediate connecting frame 501, providing vertical adjustment space for tall workpieces (such as bearing stacks), avoiding excessive heat dissipation at the top, and reducing the spacing between the adjusted units to increase heat flux density.

[0079] In some embodiments, according to Figure 1 As shown, a furnace cabinet 200 is installed on the side of the furnace body assembly 100, and a high-frequency induction coil control box 300 is installed at the bottom of the furnace body assembly 100.

[0080] The independent temperature zone component 120 and the adjustment component 500 work together to enable the heating plate to form an adjustable stroke displacement in both the horizontal and vertical directions.

[0081] In the embodiments of the present invention, more specifically: during the above-mentioned operation, the high-frequency induction coil control box 300 is used so that after the tempering and heat preservation is completed, it automatically switches to the induction heating mode, and the shielding layer and the magnetic field driven by the magnetorheological fluid do not interfere with each other. Thus, when the workpiece surface is subjected to aging treatment, the heating plate synchronously maintains the base temperature, realizing the composite process of overall tempering and surface aging, improving the utilization rate of the overall device, and reducing the workpiece turnaround time.

[0082] The wiring diagrams of the displacement sensor, high-frequency induction coil control box 300, and vortex ring generator in this invention are common knowledge in the field, and their working principles are known technologies. The appropriate model is selected according to actual use. Therefore, the control methods and wiring layouts of the displacement sensor, high-frequency induction coil control box 300, and vortex ring generator will not be explained in detail.

[0083] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A temperature equalization device for a universal box-type tempering furnace under electric heating, characterized in that: The utility model provides an independent temperature zone component (120) is arranged in the inside of furnace body component (100), and the inside of furnace body component (100) is divided into multiple units by independent temperature zone component (120), and multiple units realize power and signal transmission through electromagnetic coupling connector, and the vortex ring generator (130) is arranged in the inside of furnace body component (100) around, and cooperate with the blade vortex flow guide component (400) arranged on the top of furnace body component (100), make the eddy current intensity of furnace body component (100) improve, and the inside of furnace body component (100) is arranged with multiple sets of electromagnetic coil and coil controller respectively for regulating magnetic field distribution, and the parabolic reflection component (700) is arranged in furnace body component (100) and is adjusted angle for focusing heat radiation, and the telescopic amount adjusting component (600) is connected with independent temperature zone component (120) for dynamically adjusting the boundary size between units, The independent temperature zone component (120) includes a heating plate, the inside of the heating plate is provided with parallel resistance wires (121), the outside of the resistance wires (121) is wrapped with a heat-resistant connecting piece (122), the side end of the heat-resistant connecting piece (122) is connected with a connecting sliding piece (125), the outside of the side end of the connecting sliding piece (125) is provided with an intermediate sliding groove piece (123), the inside of the intermediate sliding groove piece (123) is provided with a bidirectional magnetorheological fluid driving piece (124) for driving the connecting sliding piece (125) to slide along the intermediate sliding groove piece (123) and adjusting the spacing between the resistance wires (121); The furnace body component (100) includes a furnace lining (101), the inside of the furnace lining (101) is provided with a parallel resistance heating wire structure (102), the outside of the parallel resistance heating wire structure (102) is provided with a ceramic heating base plate (103), and the parallel resistance heating wire structure (102) is embedded in the inside of the ceramic heating base plate (103) and is arranged in a gradient manner; The telescopic amount adjusting component (600) includes a mounting piece (601), the top end of the mounting piece (601) is provided with a heat-resistant telescopic amount air rod (602), the output end of the heat-resistant telescopic amount air rod (602) is connected with a sliding telescopic piece (603), the bottom end of the sliding telescopic piece (603) slides on the surface of the mounting piece (601), the top end of the sliding telescopic piece (603) is slidingly connected with a connecting groove piece (604), the side end of the connecting groove piece (604) is connected with a heat-resistant sliding cavity (800), the heat-resistant sliding cavity (800) is slidingly connected on the side wall surface of the ceramic heating base plate (103), two end electric travel guide rods (900) are symmetrically arranged in the inside of the heat-resistant sliding cavity (800), the side end of the electric travel guide rod (900) is connected with a magnetic connecting piece (110), and the magnetic connecting piece (110) drives the parabolic reflection component (700) to be slidingly connected on the surface of the heat-resistant sliding cavity (800). The parabolic reflecting assembly (700) comprises a magnetic connecting block (701), the top of the magnetic connecting block (701) is provided with a circumferential adjustment driving structure (702), the output center end of the circumferential adjustment driving structure (702) is connected with an angle gear adjustment structure (705), and the tail end of the angle gear adjustment structure (705) is provided with a focal point positioning installation cavity (703). The inside of the focal point positioning installation cavity (703) is provided with a parabolic reflecting cover (704), and the focal point positioning installation cavity (703) is used for coinciding the focal point of the parabolic reflecting cover (704) with the heating area of the independent temperature zone assembly (120).

2. The even temperature function device of the electric heating type general box type tempering furnace according to claim 1, characterized in that: The blade vortex ring flow guide assembly (400) comprises a flow guide groove (401), the inside of the flow guide groove (401) is provided with a double-rotation blade fan, the double-rotation blade fan is composed of an upper impeller (402) and a lower impeller (403), the upper impeller (402) rotates clockwise, the lower impeller (403) rotates counterclockwise, and the front edge and the rear edge of the upper impeller (402) and the lower impeller (403) are respectively provided with a sawtooth shape (405) and a wave shape (404).

3. The even temperature function device of the electric heating type general box type tempering furnace according to claim 1, characterized in that: The connecting end of the heating plate is provided with an adjusting assembly (500), the adjusting assembly (500) comprises horizontal and vertical connecting frames (501), the caliber of the horizontal connecting frame (501) is larger than that of the left and right connecting frames (501), the caliber of the vertical connecting frame (501) is larger than that of the upper and lower connecting frames (501), and the inside of the connecting frame (501) is provided with a connecting rod frame (502).

4. The even temperature function device of the electric heating type general box type tempering furnace according to claim 3, characterized in that: The surface of the connecting rod frame (502) is respectively provided with a first guide sliding piece (503) and a second guide sliding piece (504), and the first guide sliding piece (503) and the second guide sliding piece (504) slide along the outer wall of the connecting frame (501).

5. The even temperature function device for electric heating type general box type tempering furnace according to claim 1, characterized in that: The side end of the furnace body assembly (100) is provided with a stove cabinet (200), and the inside bottom end of the furnace body assembly (100) is provided with a high-frequency induction coil control box (300).

6. The even temperature function device of the electric heating type general box type tempering furnace according to claim 3, characterized in that: The independent temperature zone assembly (120) and the adjusting assembly (500) work cooperatively, so that the heating plate forms an adjusting stroke displacement in the horizontal direction and the vertical direction, respectively.

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