Adjustable differential temperature induction quenching device and method for forged steel supporting roller

Abstract

The invention discloses an adjustable differential temperature induction quenching device and method for a forged steel supporting roller, relates to the technical field of quenching devices, and aims at improving two modes of electric heating and medium-frequency heating in a conventional quenching process, the adjustable differential temperature induction quenching device comprises an end point temperature rising action and a medium-frequency temperature rising action, and the two actions can be carried out at the same time and do not interfere with each other; the method is characterized in that the key of influence between two parameters of temperature and current in a metal structural part is utilized, and on the basis of not changing the medium-frequency temperature rising action, the temperature-electricity cooperation series is calculated on the basis of the current value in the end point temperature rising action; according to the method, the temperature-electricity cooperative stage number is matched with the medium-frequency temperature rising action in the forged steel supporting roller to conduct linear movement action, and the essence of the method is that a winding coil in the medium-frequency temperature rising action is driven to move in the same direction or opposite directions in the length direction of the forged steel supporting roller. And the quenching heat preservation time or the temperature returning time is kept.

Description

Technical Field

[0001] The invention relates to the technical field of quenching devices, and in particular to an adjustable differential temperature induction quenching device and method for a forged steel support roller. Background Art

[0002] The formulation of quenching process involves the determination of multiple parameters, including furnace charging temperature, heating rate, holding time, quenching temperature, soaking time, etc. Especially for large forgings such as support rollers, medium / high frequency heating is often used. The heating process is from the outside to the inside, specifically, the surface temperature of the forging gradually increases and conducts to the inside. It should be noted that during the quenching process of the support roller, there is an uneven temperature distribution inside and outside the forging, such as the surface temperature is higher than the critical quenching temperature, while the inner temperature is lower than the quenching process temperature. Such phenomena will lead to the quenching effect of the forging, such as insufficient hardness or even deformation, cracks and other problems;

[0003] It is particularly important to note that the different diameters of forgings such as support rollers can be understood as differences in the "conduction distance" of heat, which will also aggravate related problems caused by uneven distribution, such as: the temperature conduction speed between the inside and outside of the small diameter area is too fast, while the temperature conduction speed between the inside and outside of the large diameter area is slower.

[0004] This application proposes a solution to this problem. Summary of the invention

[0005] The purpose of the present invention is to provide an adjustable differential temperature induction quenching device and method for forged steel support rollers, which aims to solve the problem of temperature distribution in conventional quenching process. Because the essence of conventional medium frequency heating process is that the surface temperature is conducted inward, but the diameters of forgings such as support rollers are different, resulting in different temperatures inside and outside the forgings under actual conditions, which affects the quenching effect.

[0006] The object of the present invention can be achieved by the following technical solutions: an adjustable differential temperature induction quenching method for forged steel support rollers, applied to a quenching device, the quenching method includes an end-point electrode heating process and an intermediate frequency heating process, and is provided with a temperature control module associated with the end-point electrode heating process and the intermediate frequency heating process, the temperature control module is composed of a data integration unit, an action cross-linking analysis unit and an action response unit, and performs temperature acquisition action through a temperature detection component during the end-point electrode heating process and the intermediate frequency heating process;

[0007] The end-point electrode heating process uses the two ends of the forged steel support roller as the energized positions to heat the forged steel support roller by resistance heating, and the medium-frequency heating process heats the outer surface of the forged steel support roller.

[0008] The endpoint electrode heating process and the medium frequency heating process are respectively provided with an endpoint heating action and a medium frequency heating action, and the endpoint electrode heating process and the medium frequency heating process are carried out simultaneously. The medium frequency heating action also includes a linear movement action, and the linear movement action is carried out in the same direction or in the opposite direction of the length direction of the forged steel support roller.

[0009] It is further configured that: the data integration unit is used to record the dynamic temperature parameters during the end-point electrode heating process and the medium frequency heating process, and input the dynamic temperature parameters into the action cross-linking analysis unit;

[0010] The action cross-linking analysis unit is provided with an endpoint heating action and an intermediate frequency heating action associated with the endpoint electrode heating process and the intermediate frequency heating process, and the dynamic temperature parameters include a first-order temperature group and a second-order temperature group in the endpoint heating action and the intermediate frequency heating action;

[0011] The action response unit has the control authority over the endpoint electrode heating process and the medium frequency heating process, and inputs the first-order working parameters and the second-order working parameters into the endpoint electrode heating process and the medium frequency heating process through the data integration unit, integrates and analyzes the first-order temperature group, the second-order temperature group, the first-order working parameters, and the second-order working parameters to obtain the temperature-electric synergy series, and uses the temperature-electric synergy series to interactively control the endpoint electrode heating process and the medium frequency heating process.

[0012] It is further configured that: in the end point heating action, a closed-loop circuit associated with the forged steel support roller is provided, the forged steel support roller serves as a conductor in the closed-loop circuit, and the closed-loop circuit includes a power supply component and a current detection structure.

[0013] It is further set as follows: the first-order temperature group includes the temperature parameters of the two end positions in the forged steel support roller, and are set to TdS and TdX respectively; the second-order temperature group is used to represent the temperature parameters of the surface of the forged steel support roller, and is set to TdM; the first-order working parameters include the current value It in the end point heating action; the second-order working parameters include the intermediate frequency power supply power Pd in ​​the intermediate frequency heating action.

[0014] It is further set as follows: the current value It in the first-order working parameter is further subdivided into an output current value I1 and a return current value I2, the output current value I1 is used to represent the actual current output in the power supply component, and I2 is less than or equal to I1.

[0015] It is further configured as follows: the critical temperature To during the quenching process of the forged steel support roller is set in the data integration unit, and in the end point heating action and the medium frequency heating action, TdS / TdX / TdM is less than or equal to To, and the following contents are set through the action response unit:

[0016] When one or both values ​​of TdS and TdX are greater than or equal to To, the end-point heating action stops running, and the medium-frequency heating action keeps running;

[0017] When TdS and TdX are both less than To, and TdM is greater than or equal to To, the endpoint heating action and the medium frequency heating action maintain operation, and in the endpoint heating action, the action command of the linear movement action is generated by the action crosslinking analysis unit;

[0018] When TdS and TdX are both less than To, and TdM is less than To, the endpoint temperature rise action and the intermediate frequency temperature rise action maintain operation, and no linear movement action is performed.

[0019] It is further set as follows: Md represents the thermoelectric synergy level, M d =[(I1-I2) / I1]·|Tds-Tdx|+χ, when M d When it is equal to χ, it means that the quenching process is completed.

[0020] The present invention also provides an adjustable differential temperature induction quenching device for a forged steel support roller, comprising a work frame, a lower end seat is installed at the bottom end of the work frame, the forged steel support roller is placed on the lower end seat in a vertical state, and an upper end seat is arranged at the upper end of the forged steel support roller;

[0021] The working frame is provided with an upper intermediate frequency heating assembly and a lower intermediate frequency heating assembly along the vertical direction corresponding to the upper and lower ends of the forged steel support roller, and a vertical motion assembly corresponding to the upper end seat, the upper intermediate frequency heating assembly and the lower intermediate frequency heating assembly is installed on the working frame.

[0022] The present invention has the following beneficial effects:

[0023] 1. Improve the quenching process of large structural parts such as forged steel support rollers, integrate the conventional medium frequency heating and power heating processes, and the two processes can be carried out simultaneously without interfering with each other. In order to ensure the normal progress of the two processes, a linear movement action is added to the medium frequency heating action. Its essence is: based on the winding coils in the two medium frequency heating components, they move in the same or opposite directions along the length direction of the forged steel support roller. Its purpose is: after one of the medium frequency heating components completes the local heating of the forged steel support roller, the linear movement action can "reserve" the quenching holding time or the temperature recovery time of the local heating position, mainly to avoid insufficient or excessive quenching temperature;

[0024] 2. In combination with the above contents, it is explained that: the overall invention utilizes the key influence between the two parameters of temperature and current in the metal structural parts. On the basis of not changing the medium frequency heating action, the temperature-electric synergy level is calculated based on the current value in the endpoint heating action. Its essence is: when the integral forged steel support roller is "all-roundly" heated to the quenching temperature, its resistance value tends to be stable, so that the linear movement action can be controlled based on the current value in the closed-loop current in the endpoint heating action. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of an adjustable differential temperature induction quenching device and method for forged steel support rollers proposed by the present invention;

[0027] Figure 2 The invention provides an adjustable differential temperature induction quenching device for forged steel support rollers. Figure 1 A front view of

[0028] Figure 3 A schematic diagram of the structure of a closed-loop circuit in an adjustable differential temperature induction quenching method for a forged steel support roller proposed by the present invention;

[0029] Figure 4 : It is an operation block diagram of the temperature control module in the adjustable differential temperature induction quenching method for forged steel support rollers proposed by the present invention.

[0030] In the figure: 1. working frame; 2. upper intermediate frequency heating component; 3. vertical motion component; 4. upper end seat; 5. lower intermediate frequency heating component; 6. lower end seat. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1: For the quenching process of large structures such as forged steel support rollers, because the medium frequency heating method and electrode heating method in the conventional quenching method are essentially the surface temperature of the forging is conducted from the outside to the inside, but because of the different diameters of the structure, the heat "conduction distance" is different, which will also aggravate the related problems caused by uneven distribution and affect the quenching effect. The following technical solutions are proposed:

[0033] Reference Figure 3 and Figure 4 In this embodiment, an adjustable differential temperature induction quenching method for a forged steel support roller is applied to a quenching device. The quenching method includes an end-point electrode heating process and an intermediate frequency heating process, and a temperature control module associated with the end-point electrode heating process and the intermediate frequency heating process is provided. The temperature control module consists of a data integration unit, an action cross-linking analysis unit and an action response unit, and performs temperature acquisition action through a temperature detection component during the end-point electrode heating process and the intermediate frequency heating process.

[0034] The end-point electrode heating process uses the two ends of the forged steel support roller as the energized positions to heat the forged steel support roller by resistance heating. The medium-frequency heating process heats the outer surface of the forged steel support roller.

[0035] The data integration unit is used to record the dynamic temperature parameters during the end-point electrode heating process and the medium-frequency heating process, and input the dynamic temperature parameters into the action cross-linking analysis unit;

[0036] The action cross-linking analysis unit is provided with an endpoint heating action and an intermediate frequency heating action associated with the endpoint electrode heating process and the intermediate frequency heating process, and the dynamic temperature parameters include a first-order temperature group and a second-order temperature group in the endpoint heating action and the intermediate frequency heating action;

[0037] The action response unit has the control authority over the endpoint electrode heating process and the medium frequency heating process, and inputs the first-order working parameters and the second-order working parameters into the endpoint electrode heating process and the medium frequency heating process through the data integration unit, integrates and analyzes the first-order temperature group, the second-order temperature group, the first-order working parameters, and the second-order working parameters to obtain the temperature-electric synergy series, and uses the temperature-electric synergy series to interactively control the endpoint electrode heating process and the medium frequency heating process.

[0038] Working principle: The end-point electrode heating process and the medium-frequency heating process are explained as follows: the essence of the end-point electrode heating process is to use the forged steel support roller as a "large resistor" and heat it up when powered on. However, this type of heating process is mainly concentrated at the two end positions of the structural part (forged steel support roller). Therefore, in the end-point electrode heating process, the temperature "transfer direction" of the structural part is from the end point position to the center point position.

[0039] The essence of the medium frequency heating process is to utilize the electromagnetic induction phenomenon. When the magnetic flux surrounded by the conductor loop changes, an induced potential is generated in the loop, and the structural parts in the alternating magnetic field generate induced current (eddy current). The induced current overcomes the resistance of the conductor itself and generates Joule heat, which is used to heat the conductor itself to increase its temperature. However, in this process, the temperature "transfer direction" of the structural parts is from the outer surface to the inner side of the structural parts. Combining the above two processes, this is explained as follows: the end point electrode heating process and the medium frequency heating process are carried out simultaneously, and the heating positions of the two processes correspond to the end point position and surface position of the structural parts respectively.

[0040] It should also be noted that a linear movement action is also provided in the medium frequency heating action during the medium frequency heating process, and the linear movement action is to move in the same direction or in the opposite direction along the length direction of the forged steel support roller.

[0041] Embodiment 2: This embodiment is to explain the temperature control module in Embodiment 2:

[0042] The first-order temperature group includes the temperature parameters of the two end positions of the forged steel support roller, and are set to TdS and TdX respectively. The second-order temperature group is used to represent the temperature parameters of the surface of the forged steel support roller, which is set to TdM. TdS, TdX and TdM can all be detected by temperature detection components such as temperature sensors, and are expressed as relative variables in this embodiment. The first-order working parameters include the current value It in the end point heating action, and the second-order working parameters include the intermediate frequency power supply power Pd in ​​the intermediate frequency heating action.

[0043] In combination with the above content, when the end point temperature rise action is performed independently, the temperature rise formula is: TdS / TdX=(It) 2 *Ro*t, where Ro and t represent the resistance of the forged steel support roller and the action time in the end point heating action respectively; when the intermediate frequency heating action is performed independently, the heating formula is t=(D*ρ*C*TdM) / (Pd*f*η), where t is the action time in the intermediate frequency heating action, D is the diameter of the structural part, ρ is the density of the structural part, C is the specific heat capacity of the structural part, f is the frequency in the intermediate frequency heating action, and η is the heating efficiency. It should be noted that: D, ρ, C, f and η are taken as relative constants, so that the heating formula in the intermediate frequency heating action is optimized as follows: t=(A*TdM) / (Pd*B), where A and B are constants between the above D, ρ, C, f and η;

[0044] It should be noted in this embodiment that: because the intermediate frequency heating action and the end point heating action need to be performed simultaneously, the intermediate frequency heating action will cause the temperature of the structural parts to rise. Because the temperature rise of the structural parts causes the resistance of the structural parts to change, it will also affect the end point heating action. This part is the basic technical point of the present invention, and the following working process is set for this:

[0045] S1: Explanation of the terminal heating action. A closed-loop circuit is provided in the terminal heating action. The forged steel support roller serves as a conductor in the closed-loop circuit. The closed-loop circuit includes a power supply component and a current detection structure. The current value It in the first-order working parameter is further subdivided into an output current value I1 and a return current value I2. This part mainly explains the terminal heating action. The output current value I1 is used to represent the actual current output from the power supply component. It should be noted that when the current is continuously output, the current does work and the forged steel support roller heats up, so that I2 is less than or equal to I1.

[0046] S2: The critical temperature To during the quenching process of the forged steel support roller is set in the data integration unit, so that in the end point heating action and the medium frequency heating action, TdS / TdX / TdM is less than or equal to To. The following contents are set through the action response unit:

[0047] S2-1: When one or both values ​​of TdS and TdX are greater than or equal to To, the end-point heating action stops running, and the medium-frequency heating action maintains running;

[0048] S2-2: When TdS and TdX are both less than To, and TdM is greater than or equal to To, the endpoint heating action and the medium frequency heating action maintain operation, and in the endpoint heating action, the action crosslinking analysis unit generates an action command for the linear movement action;

[0049] S2-3: When TdS and TdX are both less than To, and TdM is less than To, the endpoint temperature rise action and the intermediate frequency temperature rise action maintain operation, and no linear movement action is performed.

[0050] Embodiment 3: This embodiment provides supplementary explanation for the action response unit in Embodiment 2:

[0051] The action response unit is performed based on the action cross-linking analysis unit, and the relevant content in S2-2 in the second embodiment is described, and the integrated analysis action is explained as follows:

[0052] S3: In the end point heating action, when TdS and TdX are both less than To, and TdM is greater than or equal to To, a linear movement action is performed along the length direction of the forged steel support roller, so that TdM at the full surface position of the forged steel support roller is greater than or equal to To;

[0053] S4: Regarding S3, it should be noted that Md is used to represent the thermoelectric synergy level, and the thermoelectric synergy level is calculated as follows: M d =[(I1-I2) / I1]·|Tds-Tdx|+χ, it should be noted that: the thermoelectric synergy level is only calculated when the endpoint heating action is performed, on the contrary, when the endpoint heating action stops running, the thermoelectric synergy level is not calculated, and the calculation method of the thermoelectric synergy level is explained as follows: |Tds-Tdx| mainly represents the temperature difference in the endpoint heating action, and |Tds-Tdx| is not used as a calculation factor in the thermoelectric synergy level calculation formula but as a judgment factor in the calculation formula, when χ is the compensation constant of the calculation formula, it is explained in combination with the endpoint heating action and the medium frequency heating action: when TdM at the full surface position of the forged steel support roller is greater than or equal to To, the linear movement action is continuously performed in the medium frequency heating action, when M d When it is equal to χ, it means that the quenching process is completed.

[0054] Embodiment 4: This embodiment provides supplementary explanations on an adjustable differential temperature induction quenching device for a forged steel support roller in view of the relevant contents in Embodiments 1 to 3:

[0055] Reference Figure 1 and Figure 2 , an adjustable differential temperature induction quenching device for a forged steel support roller, comprising a work frame 1, a lower end seat 6 is installed at the bottom end of the work frame 1, the forged steel support roller is placed on the lower end seat 6 in a vertical state, and an upper end seat 4 is arranged at the upper end of the forged steel support roller;

[0056] An upper medium frequency heating component 1 and a lower medium frequency heating component 5 are arranged on the work frame 1 in the vertical direction corresponding to the upper and lower ends of the forged steel support roller, and a vertical motion component 3 corresponding to the upper end seat 4, the upper medium frequency heating component 1 and the lower medium frequency heating component 5 is installed on the work frame 1.

[0057] Working principle: It should be explained that the upper intermediate frequency heating assembly 1 and the lower intermediate frequency heating assembly 5 in the overall device are used as the structural parts of the intermediate frequency heating action in the first to third embodiments, and the upper end seat 4 cooperates with the lower end seat 6 as the structural parts of the end point heating action in the first to third embodiments, and the upper end seat 4 and the lower end seat 6 play a fixing role on the forged steel support roller;

[0058] A brief description of the end point heating action is as follows: the upper end seat 4 cooperates with the lower end seat to energize the forged steel support roller, and the upper intermediate frequency heating component 1 and the lower intermediate frequency heating component 5 are essentially two groups of winding coils, and the forged steel support roller is located at the center of the winding coil. It should also be noted that: for the linear movement action in Examples 1 to 3, in the initial state, the two groups of winding coils are located in the middle of the forged steel support roller. If the length of the forged steel support roller is L, the width of the winding coil is h, and the linear movement action includes the following two actions:

[0059] Z1: The two winding coils are located in the middle of the forged steel support roller and move away from each other at a single moving distance of h;

[0060] Z2: When the two winding coils are located at both ends of the forged steel support roller, they continue to move closer to each other at a distance of h.

[0061] In summary, improvements are made to the two methods of electric heating and medium frequency heating in the conventional quenching process. The present invention includes an endpoint heating action and a medium frequency heating action. The two actions can be performed simultaneously without interfering with each other, but the key is: utilizing the influence between the two parameters of temperature and current in the metal structure, without changing the medium frequency heating action, the temperature-electric synergy series is calculated based on the current value in the endpoint heating action, and the temperature-electric synergy series is used to cooperate with the medium frequency heating action in the forged steel support roller to perform a linear movement action. Its essence is to drive the winding coil in the medium frequency heating action to move in the same direction or opposite direction along the length direction of the forged steel support roller, and its purpose is to maintain the quenching temperature of the forged steel support roller itself and "retain" the quenching holding time or the temperature recovery time.

[0062] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0064] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An adjustable differential temperature induction quenching method for forged steel support rollers, characterized in that: Applied to a quenching device, the quenching method includes an end-point electrode heating process and an intermediate frequency heating process, and is provided with a temperature control module associated with the end-point electrode heating process and the intermediate frequency heating process, the temperature control module is composed of a data integration unit, an action cross-linking analysis unit and an action response unit, and performs temperature acquisition actions through a temperature detection component during the end-point electrode heating process and the intermediate frequency heating process; The end-point electrode heating process uses the two ends of the forged steel support roller as the energized positions to heat the forged steel support roller by resistance heating, and the medium-frequency heating process heats the outer surface of the forged steel support roller. The endpoint electrode heating process and the medium frequency heating process are respectively provided with an endpoint heating action and a medium frequency heating action, and the endpoint electrode heating process and the medium frequency heating process are carried out simultaneously. The medium frequency heating action also includes a linear movement action, and the linear movement action is carried out in the same direction or in the opposite direction of the length direction of the forged steel support roller.

2. The adjustable differential temperature induction quenching method for forged steel support rollers according to claim 1, characterized in that: The data integration unit is used to record the dynamic temperature parameters during the end-point electrode heating process and the medium-frequency heating process, and input the dynamic temperature parameters into the action cross-linking analysis unit; The action cross-linking analysis unit is provided with an endpoint heating action and an intermediate frequency heating action associated with the endpoint electrode heating process and the intermediate frequency heating process, and the dynamic temperature parameters include a first-order temperature group and a second-order temperature group in the endpoint heating action and the intermediate frequency heating action; The action response unit has the control authority over the endpoint electrode heating process and the medium frequency heating process, and inputs the first-order working parameters and the second-order working parameters into the endpoint electrode heating process and the medium frequency heating process through the data integration unit, integrates and analyzes the first-order temperature group, the second-order temperature group, the first-order working parameters, and the second-order working parameters to obtain the temperature-electric synergy series, and uses the temperature-electric synergy series to interactively control the endpoint electrode heating process and the medium frequency heating process.

3. The adjustable differential temperature induction quenching method for forged steel support rolls according to claim 2, characterized in that: In the end point heating action, a closed loop circuit associated with the forged steel support roller is provided, the forged steel support roller serves as a conductor in the closed loop circuit, and the closed loop circuit includes a power supply component and a current detection structure.

4. The adjustable differential temperature induction quenching method for forged steel support rolls according to claim 2, characterized in that: The first-order temperature group includes the temperature parameters of the two end positions of the forged steel support roller, and are set to TdS and TdX respectively. The second-order temperature group is used to represent the temperature parameters of the surface of the forged steel support roller, which is set to TdM. The first-order working parameters include the current value It in the end point heating action, and the second-order working parameters include the intermediate frequency power supply power Pd in ​​the intermediate frequency heating action.

5. The adjustable differential temperature induction quenching method for forged steel support rolls according to claim 3, characterized in that: The current value It in the first-order working parameter is further subdivided into an output current value I1 and a return current value I2. The output current value I1 is used to represent the actual current output in the power supply component, and I2 is less than or equal to I1.

6. The adjustable differential temperature induction hardening method for forged steel support rolls according to claim 4, characterized in that: The critical temperature To during the quenching process of the forged steel support roller is set in the data integration unit. In the end point heating action and the medium frequency heating action, TdS / TdX / TdM is less than or equal to To, and the following contents are set through the action response unit: When one or both values ​​of TdS and TdX are greater than or equal to To, the end-point heating action stops running, and the medium-frequency heating action keeps running; When TdS and TdX are both less than To, and TdM is greater than or equal to To, the endpoint heating action and the medium frequency heating action maintain operation, and in the endpoint heating action, the action command of the linear movement action is generated by the action crosslinking analysis unit; When TdS and TdX are both less than To, and TdM is less than To, the endpoint temperature rise action and the intermediate frequency temperature rise action maintain operation, and no linear movement action is performed.

7. The adjustable differential temperature induction hardening method for forged steel support rolls according to claim 2, characterized in that: Md represents the thermoelectric synergy level, M d =[(I1-I2) / I1]·|Tds-Tdx|+χ, when M d When it is equal to χ, it means that the quenching process is completed.

8. An adjustable differential temperature induction hardening device for forged steel support rolls, using an adjustable differential temperature induction hardening method for forged steel support rolls as claimed in any one of claims 1 to 7, characterized in that: It comprises a working frame (1), a lower end seat (6) is installed at the bottom end of the working frame (1), the forged steel support roller is placed on the lower end seat (6) in a vertical state, and an upper end seat (4) is arranged at the upper end of the forged steel support roller; The working frame (1) is provided with an upper intermediate frequency heating assembly (1) and a lower intermediate frequency heating assembly (5) in the vertical direction, which are located at the upper and lower ends of the forged steel support roller, and a vertical motion assembly (3) corresponding to the upper end seat (4), the upper intermediate frequency heating assembly (1) and the lower intermediate frequency heating assembly (5) is installed on the working frame (1).

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