Induction heating device and method for reducing quenching deformation of test plate

Abstract

The invention relates to an induction heating device and method for reducing quenching deformation of a test plate, belongs to the technical field of induction heating, and solves the problem that the plate is seriously deformed due to the fact that the induction heating device is not suitable for heating and quenching of the plate. The induction heating device comprises an induction heating assembly, a lifting assembly, a cooling assembly, a fixing piece and an objective table. The lifting assembly comprises a lead screw, a motor and a coupler. The motor is connected with the lead screw through a coupler, the motor drives the coupler to rotate, the coupler drives the lead screw to be linked, and lifting of the lead screw is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of induction heating, and in particular to an induction heating device and method for reducing quenching deformation of a test plate. Background Art

[0002] Induction heating is an efficient heating method with the advantages of fast heating speed, high efficiency, easy and precise control, and environmental protection and energy saving. Through the principle of electromagnetic induction, induction heating can heat the workpiece to the required temperature in a short time, improving production efficiency. At the same time, electrical energy is directly converted into thermal energy, reducing the loss in the energy transfer process, making the heating efficiency higher. In addition, induction heating can accurately control the temperature and range of heating, has strong adaptability, and is suitable for workpieces of various shapes and sizes, including plates, pipes, bars, profiles, etc. However, induction heating also has some disadvantages. For example, during the induction heating and quenching process of the plate, the induction heating speed is slow, and it is easy to have the phenomenon that the surface part of the plate has been quenched and water-cooled, and the inner part of the plate is still induction heated. The transition position causes the internal stress to increase and the plate is deformed due to the phase change of the organization and the temperature cliff change, which seriously affects the shape of the plate. Cold straightening is usually added to the plate for industrial production in the subsequent process, but due to the lack of straightening equipment in the laboratory, it is difficult to sample the bent plate after induction heating, resulting in waste.

[0003] The existing induction heating device uses a horizontal moving stage for placing the object to be processed, and water cooling generally uses upper and lower laminar cooling. On the one hand, the temperature gradient at the junction of the hot and cold interface is large, which makes the steel plate easy to deform. On the other hand, laminar cooling will cause uneven cooling of the steel plate. For pipe heating objects, due to the existence of internal cavities, the temperature difference between the surface and the core after induction heating is not large, and the deformation after heating and quenching by the above-mentioned induction device is not serious. However, for plates and bars, due to the absence of internal cavities, the temperature difference between the surface and the core after induction heating is large, and the deformation after quenching is serious. Summary of the invention

[0004] In view of the above analysis, the present invention aims to provide an induction heating device and method for reducing the quenching deformation of the test plate, so as to solve the problem that the existing induction heating device is not suitable for heating and quenching of the plate, resulting in serious deformation of the plate.

[0005] The purpose of the present invention is mainly achieved through the following technical solutions:

[0006] In a first aspect, the present invention provides an induction heating device for reducing quenching deformation of a test plate, comprising an induction heating assembly, a lifting assembly, a cooling assembly, a fixing member and a stage;

[0007] The induction heating assembly is used to heat the test plate, the lifting assembly is used to lift the test plate, the cooling assembly is used to cool the test plate, the fixing member is used to fix the test plate, and the stage is used to place the test plate;

[0008] The lifting assembly includes a lead screw, a motor and a coupling; the motor and the lead screw are connected via a coupling, the motor drives the coupling to rotate, and the coupling drives the lead screw to move in conjunction, thereby achieving the lifting of the lead screw.

[0009] Optionally, the induction heating assembly includes an induction coil and an inductor connected to the induction coil.

[0010] Optionally, the induction heating assembly further comprises a transformer for providing voltage and current to the inductor.

[0011] Optionally, the cooling assembly includes a liquid storage tank for containing cooling medium, and the opening of the liquid storage tank faces upward.

[0012] Optionally, the induction heating device further comprises a fixing platform, and the fixing platform is arranged above the opening of the liquid storage tank.

[0013] Optionally, a mounting hole for the lead screw to pass through is provided on the fixing platform, and the lead screw is connected to the loading platform after passing through the mounting hole.

[0014] Optionally, the cooling medium is water.

[0015] Optionally, the lead screw is a double lead screw or a quad lead screw.

[0016] Optionally, the test plate is a steel plate.

[0017] In a second aspect, the present invention also provides a method for reducing quenching deformation of a test plate, which is accomplished by using the above-mentioned induction heating device and comprises the following steps:

[0018] Step 1: Perform a safety check on the device;

[0019] Step 2: After the safety check, fill the cooling medium into the liquid storage tank and close the liquid inlet valve after reaching the specified liquid level line;

[0020] Step 3: Place the test plate on the stage, fix it with a fixing device, and then use a level to measure whether the test plate is perpendicular to the water surface;

[0021] Step 4: Turn on the motor and adjust the height of the stage so that the induction coil passes through the test plate and approaches the clamping position;

[0022] Step 5: Turn on the sensor power supply, heat the test plate, and when the test plate turns red, adjust the motor frequency to control the screw to descend;

[0023] Step 6: After the test plate has completely passed through the induction coil and completely entered the cooling medium, turn off the motor power, stop the screw from descending, and turn off the inductor power.

[0024] Optionally, the fixing member includes a clamping device, which is U-shaped and includes two vertical plates arranged opposite to each other and a connecting plate connecting the two vertical plates.

[0025] Optionally, each of the vertical plates is provided with a plurality of through holes, and the through holes are directed toward the other vertical plate.

[0026] Optionally, the positions of the through holes provided on the two vertical plates correspond to each other; the two clamping members pass through the two corresponding through holes on the two vertical plates respectively to clamp the test plate.

[0027] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0028] (1) The stage for placing the object to be processed in the present invention moves vertically, and the object to be processed enters the water vertically for cooling. The temperature gradient at the junction of the hot and cold interfaces is reduced, which can significantly improve the deformation of the test plate. At the same time, the test plate dissipates heat quickly when entering the water, and the test plate cools evenly, which improves the performance of the test plate. Specifically, for a test plate of the same size, after the test plate is treated with the induction heating device of the present invention, the core of the test plate is only 3.2-3.6mm higher than the edge, while after the same test plate is treated with the existing induction heating device, the core of the test plate is 12.3-14.4mm higher than the edge, which is 3.8-4.15 times that of the present invention.

[0029] (2) The horizontal movement of the stage of the existing induction heating device is driven by a motor, and the speed is equivalent to the motor linear speed. When the horizontal movement speed is adjusted by adjusting the external voltage or current signal, the speed may be unstable, resulting in uneven heating of some parts of the test plate. The present invention uses a screw-coupling connection to control the lifting of the stage, which can greatly reduce the movement speed fluctuation, make the test plate move stably, heat the test plate evenly, and improve the performance of the test plate.

[0030] (3) Existing induction heating devices use horizontal induction heating, and each test requires precise temperature measurement using a contact thermocouple. Due to the instability of horizontal movement, the results of each test (heating-cooling curve) are unstable, and the temperature needs to be calibrated at any time. The vertical water-immersion induction heating of the present invention has stable movement and a stable cooling rate. The heating and cooling of the test plate only depends on the power and lifting speed of the sensor. As long as the sensor power and lifting speed are determined, the heating-cooling curve for the test plate of the same size is basically stable. For test plates of the same size, after two or three sets of precise temperature measurements, there is basically no need to perform subsequent temperature measurements on the same size, which greatly simplifies the test process and improves accuracy.

[0031] (4) Since the deformation of the test plate after being treated by the induction heating device of the present invention is small, no straightening is required in the subsequent process, and no straightening equipment is required, which reduces production costs, simplifies the process, and improves production efficiency.

[0032] (5) Since the test plate enters the water surface vertically after induction heating, there is no problem of uneven local heating due to water spray cooling, thus ensuring that the test plate does not deform.

[0033] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can be obvious from the description or understood by practicing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0035] Figure 1 It is a structural schematic diagram of the induction heating device of the present invention;

[0036] Figure 2 A cross-sectional view of the test plate being fixed by a clamp;

[0037] Figure 3 The front view of the test plate fixed by the clamp.

[0038] Reference numerals:

[0039] 1-liquid storage tank; 2-flange; 3-motor; 4-coupling; 5-stage; 6-fixing part; 7-fixing table; 8-screw; 9-sensor; 10-transformer; 11-induction coil; 12-clamping part; 13-test plate; 14-mounting hole; 15-vertical plate; 16-connecting plate. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0041] In a first aspect, the present invention provides an induction heating device for reducing quenching deformation of a test plate, comprising an induction heating component, a lifting component, a cooling component, a fixing component and a stage. The induction heating component is used to heat the test plate, the lifting component is used to lift the test plate, the cooling component is used to cool the test plate, the fixing component is used to fix the test plate, and the stage is used to place the test plate.

[0042] like Figure 1As shown, the cooling assembly includes a liquid storage tank 1 for containing a cooling medium, and the opening of the liquid storage tank 1 faces upward. Exemplarily, the cooling medium may be water.

[0043] The induction heating assembly comprises an induction coil 11 and an inductor 9 connected to the induction coil 11 . The induction coil 11 is used to provide a magnetic field to heat the test plate.

[0044] Preferably, a high-temperature insulating protective sleeve is provided on the outer surface of the induction coil 11 to prevent the test plate 13 from colliding with the induction coil and causing a short circuit during the experiment.

[0045] The induction heating assembly further comprises a transformer 10 for providing a stable voltage and current to the inductor 9 .

[0046] Continue to refer Figure 1 The lifting assembly includes a lead screw 8, a motor 3 and a coupling 4. The motor 3 and the lead screw 8 are connected through the coupling 4, the motor 3 drives the coupling 4 to rotate, and the coupling 4 drives the lead screw 8 to move in a linkage manner, so as to realize the lifting of the lead screw 8.

[0047] It should be noted that the lead screw 8 can be a double lead screw or a quad lead screw. A double lead screw with a coupling can stably lift and lower the test plate on the stage and control the linear velocity of vertical movement. A quad lead screw with a coupling can make the stage lift more stable.

[0048] The induction heating device of the present invention further comprises a support frame (not shown in the figure) and a fixing platform 7. The support frame is fixedly connected to the ground, and the fixing platform 7 and the motor 3 are both fixed to the support frame. The fixing platform 7 is located above the opening of the liquid storage tank 1 (see Figure 1 ), which is provided with a mounting hole 14 for the screw to pass through, and after the screw 8 passes through the mounting hole 14, one end of the screw is connected to the stage 5. Specifically, the screw and the stage are connected through a flange 2.

[0049] Specifically, the fixing platform 7 is used to fix the housing of the lead screw 8 and support the lifting and lowering movement of the lead screw.

[0050] The present invention adopts a screw-coupling connection to control the lifting of the loading platform, which greatly reduces the vibration of the loading platform and stabilizes the lifting rate, can greatly reduce the movement speed fluctuation, make the test plate move stably, heat the test plate evenly, and improve the performance of the test plate.

[0051] like Figure 2 As shown, the fixing member 6 includes a clamping device, which is U-shaped and includes two vertical plates 15 arranged opposite to each other and a connecting plate 16 connecting one end of the two vertical plates.

[0052] like Figure 3As shown, each vertical plate 15 is provided with a plurality of through holes for the clamping members to pass through, and the through holes are oriented toward the other vertical plate. Moreover, the positions of the through holes on the two vertical plates correspond to each other. The two clamping members 12 pass through the two corresponding through holes on the two vertical plates, respectively, to clamp the test plate 13. For example, the clamping members 12 are bolts.

[0053] In a preferred embodiment, the height of the vertical plate 15 is equal to the height of the test plate 13 .

[0054] The induction heating device of the present invention further comprises a horizontal observation instrument (not shown in the figure) and a temperature monitoring assembly (not shown in the figure). The horizontal observation instrument is used to observe whether the test plate is perpendicular to the water surface. If the test plate is not perpendicular to the water surface, the angle of the test plate is adjusted by the clamping device to make it perpendicular to the water surface.

[0055] The temperature monitoring component includes a temperature monitor equipped with a K-type thermocouple for measuring the temperature at different positions of the test plate to ensure that the core temperature of the test plate reaches the expected value.

[0056] In the present invention, the stage for placing the object to be processed moves vertically, and the object to be processed enters the water vertically for cooling, and the temperature gradient at the junction of the hot and cold interfaces is reduced, which can significantly improve the deformation of the test plate. At the same time, the test plate dissipates heat faster when entering the water, and the test plate cools evenly, improving the performance of the test plate. Specifically, for a test plate of the same size, after the test plate is processed by the induction heating device of the present invention, the core of the test plate is only 3.2-3.6mm higher than the edge, while after the same test plate is processed by the existing induction heating device, the core of the test plate is 12.3-14.4mm higher than the edge, which is 3.8-4.15 times that of the present invention.

[0057] In addition, since the test plate enters the water surface vertically after induction heating, there is no problem of uneven local heating due to water spray cooling, thus ensuring that the test plate does not deform.

[0058] The vertical water-immersion induction heating of the present invention has stable movement and stable cooling speed. The heating and cooling of the test plate only depends on the power and lifting speed of the sensor. As long as the sensor power and lifting speed are determined, the heating-cooling curve of the test plate of the same size is basically stable. For the test plate of the same size, after two or three sets of accurate temperature measurement, there is basically no need to perform subsequent temperature measurement on the same size, which greatly simplifies the test process and improves accuracy.

[0059] Since the deformation of the test plate is small after being treated by the induction heating device of the present invention, no straightening or straightening equipment is required in the subsequent process, thereby reducing production costs, simplifying the process, and improving production efficiency.

[0060] Conventional induction heating post-cooling uses laminar cooling, and the cooling rate is slower than direct immersion in water. For medium and thick plates, the surface heat dissipates quickly while the core heats up slowly, the plate surface grain size is small, and the core grain size is large, resulting in uneven performance. In the present invention, the test plate is directly immersed in water for heat dissipation, the heat dissipation rate is fast, and the core structure of the steel plate surface is basically uniform, so the performance of the test plate can be improved.

[0061] In a second aspect, the present invention also provides a method for reducing the deformation of a test plate during induction heating and quenching, comprising the following steps:

[0062] Step 1: Conduct a safety inspection of the device, including whether the coupling is fully connected, whether the flange is loose, whether the water pipe is cracked, whether the wire is damaged, whether the fire extinguisher is ready, and other safety measures;

[0063] Step 2: After the safety check, fill the cooling medium into the liquid storage tank and close the liquid inlet valve after reaching the specified liquid level line;

[0064] Step 3: Place the test plate (e.g., a steel plate with a length of 900 mm, a width of 100 mm, and a thickness of 10 mm) on the stage, fix it with a clamp, and use a level to measure whether the test plate is perpendicular to the water surface;

[0065] Step 4: Turn on the motor and adjust the height of the stage so that the induction coil of the sensor passes through the test plate and approaches the position of the clamp;

[0066] Step 5: Turn on the sensor power supply, heat the test plate, and when the test plate turns red, adjust the motor frequency to control the screw to descend;

[0067] Step 6: After the test plate has completely passed through the induction coil and completely entered the cooling medium, turn off the motor power, stop the screw from descending, and turn off the inductor power.

[0068] Specifically, in step 4, the motor frequency is 50 Hz and the reduction ratio of the screw is 36:1.

[0069] In step 5, the motor frequency is 6-50 Hz, for example, 6 Hz, 10 Hz, 15 Hz, 20 Hz, 25 Hz, 30 Hz, 35 Hz, 40 Hz, 45 Hz, 50 Hz, preferably 15-20 Hz.

[0070] In addition, in step 5, the motor frequency and the travel speed satisfy the following formula (1):

[0071] v=60*f / n / i*d (1)

[0072] Among them, v represents the plate travel speed, f represents the motor frequency, n represents the number of motor pole pairs, i represents the reduction ratio, and d represents the distance traveled by the lead screw in a single turn.

[0073] In addition, the 80kW supersonic frequency equipment was used to test a steel plate with a width of 100mm and a thickness of 10mm.

[0074] The temperature of the steel plate and the number of turns of the coil satisfy the following formula (2):

[0075] T≈1500 / (1.05+1.6*N*exp(-0.7*N / v))(2)

[0076] Among them, v represents the plate travel speed, N represents the number of coil turns, 1.05, 1.6 and -0.7 represent empirical coefficients, 1500 represents the liquid-to-solid transition temperature of the steel plate, and T represents the temperature of the steel plate after passing through the induction coil.

[0077] Combining formula (1) with formula (2), it can be concluded that when the motor frequency is in the range of 15-20 Hz, the temperature of the steel plate passing through the induction coil is between 800 and 980 °C, reaching the complete austenitization temperature. The simulation results are not much different from the experimental results.

[0078] The method for reducing the induction heating and quenching deformation of the test plate of the present invention is described below with reference to specific embodiments.

[0079] Example 1

[0080] This embodiment provides a method for induction heating quenching of a steel plate with a length of 900 mm, a width of 100 mm, and a thickness of 10 mm, comprising the following steps:

[0081] Confirm safety before turning on water and electricity. Check whether the coupling is connected completely, whether the connecting flange is loose, whether the water pipe is cracked, whether the wire is damaged, whether the fire extinguisher is ready, and other safety measures;

[0082] After the safety check, fill the water tank with water and close the water valve when the specified water level is reached;

[0083] Place the test plate on the stage, fix it with a clamp, and use a level to measure whether the steel plate is perpendicular to the water surface;

[0084] Turn on the motor, adjust the motor frequency to 50Hz, increase the lifting speed of the lead screw (the lead screw adopts a reduction ratio of 36:1), and adjust the height of the stage so that the induction coil of the sensor passes through the steel plate and approaches the position of the clamp;

[0085] Turn on the inductor power supply (using 80kW power) to heat the steel plate (using a 5-turn flat induction coil). After the steel plate is heated for 10 seconds and the steel plate turns red, adjust the motor frequency to 20Hz and control the lead screw to descend. The time it takes to pass through the induction coil is about 30 seconds.

[0086] After the steel plate has completely passed through the induction coil and completely entered the water, stop the screw from descending, turn off the sensor power supply, and turn off the motor power supply.

[0087] Example 2

[0088] This embodiment provides a method for induction heating quenching of a steel plate with a length of 900 mm, a width of 100 mm, and a thickness of 10 mm, comprising the following steps:

[0089] Confirm safety before turning on water and electricity. Check whether the coupling is connected completely, whether the connecting flange is loose, whether the water pipe is cracked, whether the wire is damaged, whether the fire extinguisher is ready, and other safety measures;

[0090] After the safety check, fill the water tank with water and close the water valve when the specified water level is reached;

[0091] Place the test plate on the stage, fix it with a clamp, and use a level to measure whether the steel plate is perpendicular to the water surface;

[0092] Turn on the motor, adjust the motor frequency to 50Hz, increase the lifting speed of the lead screw (the lead screw adopts a reduction ratio of 36:1), and adjust the height of the stage so that the induction coil of the sensor passes through the steel plate and approaches the position of the clamp;

[0093] Turn on the inductor power supply (80kW power) to heat the steel plate (using a 5-turn flat induction coil). After the steel plate is heated for 10 seconds and the steel plate turns red, adjust the motor frequency to 15Hz and control the lead screw to descend. The time it takes to pass through the induction coil is about 40 seconds.

[0094] After the steel plate has completely passed through the induction coil and completely entered the water, stop the screw from descending, turn off the sensor power supply, and turn off the motor power supply.

[0095] Example 3

[0096] This embodiment provides a method for induction heating quenching of a steel plate with a length of 900 mm, a width of 100 mm, and a thickness of 10 mm, comprising the following steps:

[0097] Confirm safety before turning on water and electricity. Check whether the coupling is connected completely, whether the connecting flange is loose, whether the water pipe is cracked, whether the wire is damaged, whether the fire extinguisher is ready, and other safety measures;

[0098] After the safety check, fill the water tank with water and close the water valve when the specified water level is reached;

[0099] Place the test plate on the stage, fix it with a clamp, and use a level to measure whether the steel plate is perpendicular to the water surface;

[0100] Turn on the motor, adjust the motor frequency to 50Hz, increase the lifting speed of the lead screw (the lead screw adopts a reduction ratio of 36:1), and adjust the height of the stage so that the induction coil of the sensor passes through the steel plate and approaches the position of the clamp;

[0101] Turn on the inductor power supply (using 80kW power) to heat the steel plate (using a 5-turn flat induction coil). After the steel plate is heated for 10 seconds and the steel plate turns red, adjust the motor frequency to 18Hz and control the lead screw to descend. The time it takes to pass through the induction coil is about 33 seconds.

[0102] After the steel plate has completely passed through the induction coil and completely entered the water, stop the screw from descending, turn off the sensor power supply, and turn off the motor power supply.

[0103] Comparative Example 1

[0104] The steel plate size used in this comparative example is the same as that in Example 1, except that the induction heat treatment device disclosed in Publication No. CN208667793 U is used, and the motor frequency is 20 Hz.

[0105] Comparative Example 2

[0106] This comparative example is substantially the same as comparative example 1, except that the motor frequency is 15 Hz.

[0107] Comparative Example 3

[0108] This comparative example is substantially the same as comparative example 1, except that the motor frequency is 18 Hz.

[0109] Comparative Example 4

[0110] This comparative example is basically the same as Example 1, except that after the steel plate turns red, the motor frequency is adjusted to 5 Hz, and the time for passing through the induction coil is 120 s.

[0111] Comparative Example 5

[0112] This comparative example is basically the same as Example 1, except that after the steel plate turns red, the motor frequency is adjusted to 30 Hz, and the time to pass through the induction coil is 20 seconds.

[0113] Comparative Example 6

[0114] This comparative example is basically the same as Example 1, except that after the steel plate turns red, the motor frequency is adjusted to 50 Hz, and the time to pass through the induction coil is 12 seconds.

[0115] The dimensions of the center of the steel plate higher than the edge after being treated in the embodiment and the comparative example were measured respectively.

[0116] The results show that the temperatures of the steel plates in Example 1 and Comparative Example 1 are 803°C and 809°C, respectively. The core of the steel plate treated in Example 1 is 3.2 mm higher than the edge, and the core of the steel plate treated in Comparative Example 1 is 12.3 mm higher than the edge, which is 3.8 times that of the present invention; the temperatures of the steel plates in Example 2 and Comparative Example 2 are 997°C and 994°C, respectively. The core of the steel plate treated in Example 2 is 3.6 mm higher than the edge, and the core of the steel plate treated in Comparative Example 2 is 14.4 mm higher than the edge, which is 4 times that of the present invention; the temperatures of the steel plates in Example 3 and Comparative Example 3 are 951°C and 953°C, respectively. The core of the steel plate treated in Example 3 is 3.3 mm higher than the edge, and the core of the steel plate treated in Comparative Example 3 is 13.7 mm higher than the edge, which is 4.15 times that of the present invention.

[0117] It can be concluded that the higher the motor frequency, the greater the distance that the core of the steel plate treated by the existing induction heat treatment device and the induction heating device of the present invention is higher than the edge, that is, the greater the deformation difference.

[0118] After being treated with Comparative Example 4, the temperature of the steel plate reached 1393°C and the deformation reached 35.4mm. The deformation was too serious and could not be used. After being treated with Comparative Example 5, the temperature of the steel plate reached 573°C, did not enter the quenching temperature range, and the deformation was only 2.4mm. After being treated with Comparative Example 6, the temperature of the steel plate reached 307°C, did not enter the quenching temperature range, and the deformation was only 1.1mm, which means there was basically no deformation.

[0119] It can be concluded that if the motor frequency is too low, the temperature of the treated steel plate is too high and the deformation is serious; if the motor frequency is too high, the temperature of the treated steel plate is too low and it does not enter the quenching temperature range. The present invention can ensure that the temperature of the treated steel plate reaches the complete austenitization temperature and the deformation of the steel plate is small by controlling the motor frequency within the range of 15 to 20 Hz.

[0120] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An induction heating device for reducing quenching deformation of a test plate, characterized in that: It includes an induction heating component, a lifting component, a cooling component, a fixing component and a stage; The induction heating assembly is used to heat the test plate, the lifting assembly is used to lift the test plate, the cooling assembly is used to cool the test plate, the fixing member is used to fix the test plate, and the stage is used to place the test plate; The lifting assembly includes a lead screw, a motor and a coupling; the motor and the lead screw are connected via a coupling, the motor drives the coupling to rotate, and the coupling drives the lead screw to move in conjunction, thereby achieving the lifting of the lead screw.

2. The induction heating device according to claim 1, characterized in that: The induction heating assembly includes an induction coil and an inductor connected to the induction coil.

3. The induction heating device according to claim 2, characterized in that: The induction heating assembly further comprises a transformer for providing voltage and current to the inductor.

4. The induction heating device according to claim 1, characterized in that: The cooling assembly comprises a liquid storage tank for containing cooling medium, and the opening of the liquid storage tank faces upward.

5. The induction heating device according to claim 4, characterized in that: The induction heating device also includes a fixing platform, which is arranged above the opening of the liquid storage tank.

6. The induction heating device according to claim 5, characterized in that: The fixing platform is provided with a mounting hole for the lead screw to pass through, and the lead screw is connected to the loading platform after passing through the mounting hole.

7. The induction heating device according to claim 4, characterized in that: The cooling medium is water.

8. The induction heating device according to any one of claims 1 to 7, characterized in that: The lead screws are double lead screws or quad lead screws.

9. The induction heating device according to claim 8, characterized in that: The test plate is a steel plate.

10. A method for reducing quenching deformation of a test plate, characterized in that: The method is completed by using the induction heating device according to any one of claims 1 to 9, comprising the following steps: Step 1: Perform a safety check on the device; Step 2: After the safety check, fill the cooling medium into the liquid storage tank and close the liquid inlet valve after reaching the specified liquid level line; Step 3: Place the test plate on the stage, fix it with a fixing device, and then use a level to measure whether the test plate is perpendicular to the water surface; Step 4: Turn on the motor and adjust the height of the stage so that the induction coil passes through the test plate and approaches the clamping position; Step 5: Turn on the sensor power supply, heat the test plate, and when the test plate turns red, adjust the motor frequency to control the screw to descend; Step 6: After the test plate has completely passed through the induction coil and completely entered the cooling medium, turn off the motor power, stop the screw from descending, and turn off the inductor power.

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