A method for controlling temperature of a guide arm rolling medium frequency furnace heating

Abstract

The application discloses a kind of guide arm rolling intermediate frequency furnace heating temperature control method, and intermediate frequency heating furnace and intermediate frequency heating furnace controller, temperature collector, production line terminal controller interoperate to realize the accurate control of workpiece heating temperature.Intermediate frequency furnace includes intermediate frequency heating furnace body and temperature collection frame, transverse guide rail is equipped on temperature collection frame, temperature collector that can detect guide arm temperature is equipped on transverse guide rail and slides back and forth, driving motor that drives temperature collector to slide is equipped on temperature collection frame;Intermediate frequency furnace heating controller controls intermediate frequency furnace heating power;And temperature information is sent to production line terminal controller, and production line terminal controller carries out logical judgment to the temperature information collected according to the logic control program set, and timely power adjustment instruction is output to intermediate frequency furnace controller, and intermediate frequency furnace adjusts output power according to instruction.It can be more accurately controlled workpiece heating temperature, effectively avoid workpiece overtemperature, not to the problem of temperature influence production rhythm.

Description

Technical Field

[0001] This invention relates to a heating and temperature control method for intermediate frequency furnaces used in guide arm rolling, which is particularly suitable for automated production lines that simultaneously heat a single coil and multiple workpieces. Background Technology

[0002] Induction furnace heating is a common heating method in the forging and rolling industries, especially in automated production lines. The production line uses a single coil and simultaneous heating of multiple workpieces. The workpieces are fed sequentially according to a set cycle time. However, due to the constant heating power of the induction furnace and the constantly changing number of workpieces in the furnace chamber, the actual heating time for each workpiece to reach the set temperature varies considerably. This can lead to: 1. The workpiece reaching the set temperature before the subsequent process is completed, resulting in the workpiece's heating temperature easily exceeding the set temperature; 2. The workpiece not reaching the set temperature after the subsequent process is completed, leading to waiting times and affecting the cycle time. Summary of the Invention

[0003] The present invention aims to provide a new method for controlling the heating temperature of a medium-frequency furnace, which can more accurately control the actual heating temperature of each workpiece and the cycle time of the production line, reduce the risk of workpiece overheating, and greatly improve the cycle time of the production line.

[0004] To address the aforementioned technical problems, this invention provides a method for temperature control in a medium-frequency furnace during guide arm rolling. This control method is based on a temperature acquisition device that measures the workpiece temperature in real time according to a pre-set program and feeds the temperature signal back to the production line terminal controller. The production line terminal controller performs logical judgments according to a preset program and outputs an execution signal to adjust the power to the medium-frequency furnace controller, thereby achieving logical control of the heating power of the medium-frequency furnace, i.e., control of the workpiece temperature. Changes in workpiece temperature are measured in real time by the temperature acquisition device and fed back to the production line terminal controller, which performs logical judgments in real time and outputs an execution signal to adjust the power, thus achieving real-time adjustment of the heating power of the medium-frequency furnace and forming a complete temperature-heating power logical control closed loop.

[0005] A method for heating and temperature control in an intermediate frequency furnace for guide arm rolling, characterized in that the intermediate frequency furnace includes an intermediate frequency heating furnace body and a temperature acquisition frame. A heating chamber is provided inside the intermediate frequency heating furnace body. A transverse loading port communicating with the heating chamber and used for loading the guide arm is provided on one side of the intermediate frequency heating furnace body. A transverse temperature detection port communicating with the heating chamber is provided on the other side of the intermediate frequency heating furnace body. An intermediate frequency furnace controller for controlling the heating temperature inside the intermediate frequency heating furnace body is provided on the intermediate frequency heating furnace body. A transverse guide rail is provided on the temperature acquisition frame opposite to the transverse temperature detection port. A temperature acquisition device that slides back and forth on the transverse guide rail to detect the temperature of the guide arm is provided on the transverse guide rail. A drive motor for driving the temperature acquisition device to slide is provided on the temperature acquisition frame. The production line terminal controller communicates simultaneously with the intermediate frequency furnace heating controller, the temperature acquisition device, and the robotic arm, receiving information and issuing commands. The intermediate frequency furnace heating controller controls the heating power of the intermediate frequency furnace.

[0006] The heating and temperature control method includes:

[0007] S1: By activating the loading button on the production line terminal controller, the production line terminal controller receives the first piece loading signal from the guide arm. After reading the storage position number of the last piece produced in the previous batch in the production line terminal controller, it issues an instruction to the robot to place the first piece of product in the next numbered position in the heating chamber of the medium frequency furnace and records the position as stored. The storage position and the number of stored pieces are recorded. The production line terminal controller sends the stored piece count data signal to the medium frequency heating furnace controller. At the same time, the production line terminal controller sends the guide arm storage position signal to the temperature acquisition device.

[0008] S2: After receiving the signal of the guide arm's storage position, the temperature acquisition device drives the drive motor to slide relative to the transverse guide rail, so that the temperature acquisition device moves to the corresponding numbered position and starts to collect the temperature of the guide arm. At the same time, the collected temperature is fed back to the production line terminal controller until the next position trigger signal is received from the production line terminal controller.

[0009] S3: After receiving the storage quantity change signal sent by the production line terminal controller, the medium frequency heating furnace controller determines the storage quantity and uses the corresponding heating power to heat the guide arm according to the storage quantity until it receives the next heating power adjustment signal or storage quantity change signal.

[0010] S4: The production line terminal controller reads the temperature acquisition data, compares it with the theoretical temperature, calculates the compensation power according to the algorithm, determines the actual power level to be adjusted based on the built-in range, and sends a command to the intermediate frequency heating furnace controller to adjust the heating power; the intermediate frequency heating furnace controller receives the power adjustment signal and adjusts the heating power according to the level rules until it receives the next power adjustment signal or stores a change in the number of elements;

[0011] S5: The production line terminal controller receives the temperature threshold signal fed back by the temperature acquisition unit. The production line terminal controller instructs the medium frequency heating furnace controller to perform heating power adjustment. The heating power adjustment formula is: actual heating power = base power of number of pieces - power reduction corresponding to threshold temperature, until the next heating power adjustment signal is received or the number of pieces change signal is stored.

[0012] S6: The production line terminal controller synchronously reads the data from the temperature acquisition unit and the feeding signal until the next action is triggered. The signal that is triggered first, the temperature-reaching discharge signal or the feeding signal, is executed. If the two signals are triggered at the same time, the temperature-reaching discharge signal has higher priority than the feeding signal.

[0013] When the production line terminal controller receives the feeding signal, it reads the storage position number of the previous workpiece, places the new workpiece in the next numbered position, records the position as stored, increments the number of stored workpieces by 1, and sends the number of stored workpieces data signal to the medium frequency heating furnace controller; the temperature in the temperature threshold signal is greater than the temperature in the temperature discharge signal;

[0014] The production line terminal controller receives the temperature acquisition signal from the temperature acquisition device, switches the heating power to the heat preservation power, sends a command to the robot to discharge the material, decrements the stored item count by 1, sends a signal to instruct the temperature acquisition device to move to the next position and sends the stored item count data signal to the medium frequency heating furnace controller, and performs a judgment. If the stored item count is ≤1, it jumps to step S2. If the stored item count is >1, it executes steps S2, S3, S4 and S6 simultaneously.

[0015] To solve the above-mentioned technical problems, a further preferred embodiment of the present invention is as follows: the furnace body of the medium-frequency heating furnace is provided with 5 workstations for placing guide arms, and each workstation is assigned a corresponding number on the production line terminal controller. The workstations inside the medium-frequency heating furnace are numbered 1-5 from left to right; the next numbered position after workstation 1 is workstation 2, the next numbered position after workstation 2 is workstation 3, the next numbered position after workstation 3 is workstation 4, the next numbered position after workstation 4 is workstation 5, and the next numbered position after workstation 5 is workstation 1.

[0016] To solve the above-mentioned technical problems, a further preferred embodiment of the present invention is as follows: In step S3, the medium-frequency furnace heating controller has two built-in calculation methods, namely a calculation method for adjusting the heating power based on the stored number of roots change signal and a calculation method for adjusting the heating power based on the adjustment of the heating power signal. The medium-frequency furnace heating controller executes the command according to the instruction received from the production line terminal controller. The medium-frequency furnace heating controller calls different methods to change the heating power according to the change in the number of roots or the adjustment of the power. When two instructions are received at the same time, the calculation results are superimposed to form the final result.

[0017] To solve the above-mentioned technical problems, a further preferred embodiment of the present invention is as follows: When the number of guide arms changes according to the received instruction, the specific method for changing the heating power is as follows: First, the medium-frequency furnace heating controller determines the basic heating power of the medium-frequency furnace body based on the weight of a single guide arm placed inside the furnace body. The formula relationship between the weight of a single guide arm and the basic power is as follows:

[0018] Base power (kW) 200 250 300

[0019] Then, the medium-frequency furnace heating controller receives the signal indicating a change in the number of guide arms and adjusts the heating power of the furnace body accordingly. The formula relating the number of guide arms added to the furnace body to the heating power of the furnace body is as follows:

[0020] Heating power (kW) base power base power base power Base power +50 Base power +50

[0021] When the medium-frequency furnace heating controller adjusts the power according to the received instruction, the calculation method based on the power adjustment instruction is as follows:

[0022] Power change (kW) 0 +50 +100 +150 +200

[0023] To solve the above-mentioned technical problems, a further preferred embodiment of the present invention is: in step S4, the algorithm for the production line terminal controller to calculate the compensation power is as follows:

[0024] Assume the theoretical heating temperature of the guide arm is A, and the actual measured heating temperature of the guide arm is B;

[0025] Heating power adjustment level 0 1 2 3 4 Power change (kW) 0 +50 +100 +150 +200

[0026] To solve the above-mentioned technical problems, a further preferred embodiment of the present invention is: the feeding control mode of the production line terminal controller can set the feeding interval time for the first three feeds and the feeding interval time for more than three feeds, and setting the feeding interval time is a necessary condition but not a sufficient condition, and the feeding action needs to be determined in combination with other signals. Attached Figure Description

[0027] Figure 1 Schematic diagram of the heating and temperature control logic of an intermediate frequency furnace;

[0028] Figure 2 This is a schematic diagram of a single-coil, multi-station medium-frequency furnace heating system;

[0029] Figure 3 It is a 3D view of the medium-frequency furnace and temperature acquisition frame. Detailed Implementation

[0030] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0031] See attached document Figure 1 This invention provides a method for controlling the heating temperature of a medium-frequency furnace, comprising the following main modules: a medium-frequency furnace, a medium-frequency furnace controller, a temperature acquisition device, and a production line terminal controller. Through the cooperation of these modules, precise control of the workpiece heating temperature can be achieved. Specifically, the medium-frequency furnace heats the workpiece according to a preset program, and the temperature acquisition device detects the workpiece temperature according to the preset program and feeds the temperature information back to the production line terminal controller. The production line terminal controller makes judgments according to a pre-set logic program and outputs corresponding power adjustment commands to the medium-frequency furnace heating controller. Unlike conventional medium-frequency furnace heating temperature control methods, this control method is suitable for situations where a single coil and multiple workpieces are heated simultaneously, and can still accurately control the temperature of each workpiece and the production line cycle time.

[0032] See Figure 3 The medium-frequency furnace includes a medium-frequency heating furnace body 1 and a temperature acquisition frame 2. A heating chamber is provided inside the medium-frequency heating furnace body 1. A transverse loading port communicating with the heating chamber and used for loading the guide arm 100 is provided on one side of the medium-frequency heating furnace body. A transverse temperature detection port communicating with the heating chamber is provided on the other side of the medium-frequency heating furnace body. A medium-frequency furnace controller for controlling the heating temperature inside the medium-frequency heating furnace body is provided on the medium-frequency heating furnace body 1. A transverse guide rail 21 opposite to the transverse temperature detection port is provided on the temperature acquisition frame 2. A temperature acquisition device 3 that slides back and forth on the transverse guide rail 21 to detect the temperature of the guide arm is provided on the transverse guide rail 2. A drive motor 4 for driving the temperature acquisition device to slide is provided on the temperature acquisition frame 2. The production line terminal controller communicates simultaneously with the medium-frequency furnace heating controller, the temperature acquisition device, and the robotic arm, receiving information and issuing commands. The medium-frequency furnace heating controller controls the heating power of the medium-frequency furnace.

[0033] The heating and temperature control method includes the following steps:

[0034] S1: By activating the loading button on the production line terminal controller, the production line terminal controller receives the first piece loading signal from the guide arm. After reading the storage position number of the last piece produced in the previous batch in the production line terminal controller, it issues an instruction to the robot to place the first piece of product in the next numbered position in the heating chamber of the medium frequency furnace and records the position as stored. The storage position and the number of stored pieces are recorded. The production line terminal controller sends the stored piece count data signal to the medium frequency heating furnace controller. At the same time, the production line terminal controller sends the guide arm storage position signal to the temperature acquisition device.

[0035] S2: After receiving the signal of the guide arm's storage position, the temperature acquisition device drives the drive motor to slide relative to the transverse guide rail, so that the temperature acquisition device moves to the corresponding numbered position and starts to collect the temperature of the guide arm. At the same time, the collected temperature is fed back to the production line terminal controller until the next position trigger signal is received from the production line terminal controller.

[0036] S3: After receiving the storage quantity change signal sent by the production line terminal controller, the medium frequency heating furnace controller determines the storage quantity and uses the corresponding heating power to heat the guide arm according to the storage quantity until it receives the next heating power adjustment signal or storage quantity change signal.

[0037] S4: The production line terminal controller reads the temperature acquisition data, compares it with the theoretical temperature, calculates the compensation power according to the algorithm, determines the actual power level to be adjusted based on the built-in range, and sends a command to the intermediate frequency heating furnace controller to adjust the heating power; the intermediate frequency heating furnace controller receives the power adjustment signal and adjusts the heating power according to the level rules until it receives the next power adjustment signal or stores a change in the number of elements;

[0038] S5: The production line terminal controller receives the temperature threshold signal from the temperature acquisition unit. The terminal controller then instructs the medium-frequency heating furnace controller to adjust the heating power. The heating power adjustment formula is: Actual heating power = Base power per piece - Power reduction corresponding to the threshold temperature. This process continues until the next heating power adjustment signal is received or a piece count change signal is stored. For example, if the furnace outlet temperature is set to 980-1020 degrees Celsius, and the temperature threshold is set to 940 degrees Celsius, the threshold is reached at 940 degrees Celsius, and the power is reduced according to this step. This acts as an early brake to prevent excessively rapid heating and overheating. Without reducing the power, the temperature might quickly reach 1100 degrees Celsius.

[0039] S6: The production line terminal controller synchronously reads the data from the temperature acquisition unit and the feeding signal until the next action is triggered. The signal that is triggered first, the temperature-reaching discharge signal or the feeding signal, is executed. If the two signals are triggered at the same time, the temperature-reaching discharge signal has higher priority than the feeding signal.

[0040] When the production line terminal controller receives the feeding signal, it reads the storage position number of the previous workpiece, places the new workpiece in the next numbered position, records the position as stored, increments the number of stored workpieces by 1, and sends the number of stored workpieces data signal to the medium frequency heating furnace controller; the temperature in the temperature threshold signal is greater than the temperature in the temperature discharge signal;

[0041] The production line terminal controller receives the temperature acquisition signal from the temperature acquisition device, switches the heating power to the heat preservation power, sends a command to the robot to discharge the material, decrements the stored item count by 1, sends a signal to instruct the temperature acquisition device to move to the next position and sends the stored item count data signal to the medium frequency heating furnace controller, and performs a judgment. If the stored item count is ≤1, it jumps to step S2. If the stored item count is >1, it executes steps S2, S3, S4 and S6 simultaneously.

[0042] See appendix Figure 2 The intermediate frequency furnace is a single-coil intermediate frequency heating furnace, and the number of workpieces that can be placed can be set according to the width of the furnace chamber, such as 1 piece, 2 pieces...N pieces. In step S1, after activating the loading button on the production line terminal controller, the production line terminal controller loads the workpieces sequentially according to the set rhythm (e.g., one minute). For example, when workpiece No. 1 is loaded, the intermediate frequency furnace starts heating workpiece No. 1. When the production time reaches the set loading rhythm, workpiece No. 1 has not yet been heated to the set temperature, but the loading time has expired, the production line terminal controller will load workpiece No. 2. After workpiece No. 2 is loaded, the intermediate frequency furnace simultaneously heats workpieces No. 1 and No. 2. And so on, the number of workpieces in the intermediate frequency furnace changes continuously with the production rhythm, and the workpiece temperature also varies due to different heating times.

[0043] In this invention, the medium-frequency heating furnace body is provided with 5 workstations for placing guide arms, and each workstation is numbered one-to-one on the production line terminal controller. The workstations inside the medium-frequency heating furnace body are numbered 1-5 from left to right; the next numbered position after workstation 1 is workstation 2, the next numbered position after workstation 2 is workstation 3, the next numbered position after workstation 3 is workstation 4, the next numbered position after workstation 4 is workstation 5, and the next numbered position after workstation 5 is workstation 1.

[0044] In step S2, during the heating process in the medium-frequency furnace, the temperature sensor measures the temperature of the workpiece in real time. The temperature measurement logic is as follows: the temperature of the first workpiece fed into the furnace is always measured until it reaches the required temperature and flows into the next process. After that, the temperature sensor automatically measures the temperature of the next workpiece fed into the furnace. For example, after the production line has finished feeding workpieces 1, 2, 3...5, the temperature sensor will always collect the temperature of workpiece 1, but will not collect the temperatures of workpieces 2, 3...5. When workpiece 1 reaches the required temperature and flows into the next process, the temperature sensor automatically collects the temperature of workpiece 2, while the production line completes the feeding of workpiece 5+1. When workpiece 2 reaches the required temperature and flows into the next process, the temperature sensor automatically collects the temperature of workpiece 3, while the production line completes the feeding of workpiece 5+2, and so on.

[0045] Furthermore, the above production process is completed by issuing instructions from the line terminal controller. Specifically:

[0046] 1. After the No. 1 workpiece is loaded, the medium frequency furnace begins to heat the No. 1 workpiece, and at the same time the temperature acquisition device monitors the temperature of the No. 1 workpiece in real time.

[0047] 2. When the production time reaches the next loading cycle, and workpiece number 1 has not yet been heated to the set temperature, the production line terminal controller will issue a command: load workpiece number 2. This process continues until workpieces number 3 through 5 are loaded.

[0048] 3. When the production line terminal controller receives a signal from the temperature acquisition unit that workpiece No. 1 has reached the set temperature, it will issue an instruction: workpiece No. 1 will be transferred to the next process, the temperature acquisition unit will collect the temperature of workpiece No. 2 in real time, and workpiece No. 5+1 will be loaded.

[0049] 4. When the production line terminal controller receives a signal from the temperature acquisition unit that workpiece No. 2 has reached the set temperature, it will issue an instruction: workpiece No. 2 will be transferred to the next process, the temperature acquisition unit will collect the temperature of workpiece No. 3 in real time, and workpiece No. 5+2 will be loaded.

[0050] 5. And so on.

[0051] In step S3, the medium-frequency furnace heating controller has two built-in calculation methods: one is to adjust the heating power based on the stored number of roots change signal, and the other is to adjust the heating power based on the adjustment of the heating power signal. The medium-frequency furnace heating controller executes the command according to the instruction received from the production line terminal controller. The medium-frequency furnace heating controller calls different methods to change the heating power according to the change in the number of roots or the adjustment of the power. When two instructions are received at the same time, the calculation results are superimposed to form the final result.

[0052] When the number of guide arms changes according to the received instruction, the specific method for changing the heating power is as follows: First, the medium-frequency furnace heating controller determines the basic heating power of the furnace body based on the weight of a single guide arm placed inside the furnace. The formula relationship between the weight of a single guide arm and the basic power is as follows:

[0053] Base power (kW) 200 250 300

[0054] Then, the medium-frequency furnace heating controller receives the signal indicating a change in the number of guide arms and adjusts the heating power of the furnace body accordingly. The formula relating the number of guide arms added to the furnace body to the heating power of the furnace body is as follows:

[0055] Heating power (kW) base power base power base power Base power +50 Base power +50

[0056] When the medium-frequency furnace heating controller (200) adjusts the power according to the received instruction, the calculation method based on the power adjustment instruction is as follows:

[0057] Power change (kW) 0 +50 +100 +150 +200 Furnace temperature range (°C) ≥880 820~880 760~820 700~760 ≤700

[0058] When a workpiece reaches its set temperature and flows into the next process, the temperature sensor automatically collects the temperature of the next workpiece. For example, if workpiece number 3 has reached its set temperature and flows into the next process, the temperature sensor automatically collects the temperature of workpiece number 4. Importantly, the production line terminal controller performs logical judgments on the temperature information input by the temperature sensor and issues an instruction to adjust the heating power of the induction furnace. Specifically, when workpiece number 3 has reached its set temperature and flows into the next process, the temperature sensor automatically collects the temperature of workpiece number 4 and performs logical judgments on the temperature of workpiece number 4, issuing an instruction to adjust the heating power of the induction furnace. The logic for this judgment is whether the temperature of workpiece number 4 has reached the expected value. If it has not reached the set expected temperature, the production line terminal controller will adjust the heating power of the induction furnace according to a preset program. For example, if the judgment logic is that the initial workpiece temperature range is 800-880℃, and the initial temperature of workpiece number 4 is below 800℃, an instruction to increase the heating power of the induction furnace is issued. If the initial temperature of workpiece number 4 is above 880℃, an instruction to decrease the heating power of the induction furnace is issued. If the initial temperature of workpiece #4 is within the equipment's range, no power adjustment command is needed. This achieves precise control over workpiece temperature and production cycle time.

[0059] The judgment logic of the production line terminal controller can be flexibly set by adding a certain number of judgment levels to achieve more precise temperature control. For example, the first level: the judgment logic includes "below 800℃", "800-880℃", and "above 880℃", and the corresponding medium-frequency furnace power adjustment measures are: "increase by 100KW below 800℃", "no adjustment required between 800-880℃", and "decrease by 100KW above 880℃".

[0060] Gear 1 Below 800℃ Increase by 100KW Gear 2 800-880℃ No adjustment required Gear 3 Above 880℃ Reduce by 100KW

[0061] The second level: The judgment logic includes "below 700℃", "700-800℃", "800-880℃", and "above 880℃". The corresponding medium-frequency furnace power adjustment measures are: "below 700℃, increase by 200KW", "700-800℃, increase by 100KW", "800-880℃, no adjustment required", and "above 880℃, decrease by 100KW".

[0062] Gear 1 Below 700℃ Increase by 200KW Gear 2 700-800℃ Increase by 100KW Gear 3 800-880℃ No adjustment required Gear 4 Above 880℃ Reduce by 100KW

[0063] And so on.

[0064] A further preferred embodiment of the present invention is: in step S4, the algorithm for the production line terminal controller (400) to calculate the compensation power is as follows:

[0065] Assume the theoretical heating temperature of the guide arm is A, and the actual measured heating temperature of the guide arm is B;

[0066] Heating power adjustment level 0 1 2 3 4 Power change (kW) 0 +50 +100 +150 +200 Furnace temperature range (°C) ≥880 820~880 760~820 700~760 ≤700

[0067] In step S5, the threshold temperature corresponds to a power reduction of 150kW. The furnace exit temperature is set to 980°C to 1020°C, and the temperature threshold is set to 940°C. Once the temperature reaches 940°C, the threshold is reached, and the power is reduced according to this step to brake the circuit in advance.

[0068] To solve the above-mentioned technical problems, a further preferred embodiment of the present invention is: the feeding control mode of the production line terminal controller 400 can set the feeding interval time for the first three feeds and the feeding interval time for more than three feeds, and setting the feeding interval time is a necessary condition but not a sufficient condition, and the feeding action needs to be determined in combination with other signals.

[0069] The logic settings for each gear can be configured on the production line control terminal based on the actual production line conditions. Theoretically, the more precise the gear settings, the higher the control progress, meaning more accurate workpiece temperature control and more stable production cycle time.

[0070] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A method for heating and temperature control in a medium-frequency furnace for guide arm rolling, characterized in that... The medium-frequency furnace includes a medium-frequency heating furnace body and a temperature acquisition frame. A heating chamber is provided inside the medium-frequency heating furnace body. A transverse loading port communicating with the heating chamber and used for loading a guide arm is provided on one side of the furnace body. A transverse temperature detection port communicating with the heating chamber is provided on the other side of the furnace body. A medium-frequency furnace controller for controlling the heating temperature inside the furnace body is provided on the furnace body. A transverse guide rail opposite to the transverse temperature detection port is provided on the temperature acquisition frame. A temperature acquisition device that slides back and forth on the transverse guide rail to detect the temperature of the guide arm is provided on the transverse guide rail. A drive motor for driving the temperature acquisition device to slide is provided on the temperature acquisition frame. The production line terminal controller communicates simultaneously with the medium-frequency furnace heating controller, the temperature acquisition device, and the robotic arm, receiving information and issuing commands. The heating controller of the medium-frequency furnace controls the heating power of the medium-frequency furnace; The heating and temperature control method includes: S1: By activating the loading button on the production line terminal controller, the production line terminal controller receives the first piece loading signal from the guide arm. After reading the storage position number of the last piece produced in the previous batch in the production line terminal controller, it issues an instruction to the robot to place the first piece of product in the next numbered position in the heating chamber of the medium frequency furnace and records the position as stored. The storage position and the number of stored pieces are recorded. The production line terminal controller sends the stored piece count data signal to the medium frequency heating furnace controller. At the same time, the production line terminal controller sends the guide arm storage position signal to the temperature acquisition device. S2: After receiving the signal of the guide arm's storage position, the temperature acquisition device drives the drive motor to slide relative to the transverse guide rail, so that the temperature acquisition device moves to the corresponding numbered position and starts to collect the temperature of the guide arm. At the same time, the collected temperature is fed back to the production line terminal controller until the next position trigger signal is received from the production line terminal controller. S3: After receiving the storage quantity change signal sent by the production line terminal controller, the medium frequency heating furnace controller determines the storage quantity and uses the corresponding heating power to heat the guide arm according to the storage quantity until it receives the next heating power adjustment signal or storage quantity change signal. S4: The production line terminal controller reads the temperature acquisition data, compares it with the theoretical temperature, calculates the compensation power according to the algorithm, determines the actual power level to be adjusted based on the built-in range, and sends a command to the intermediate frequency heating furnace controller to adjust the heating power; the intermediate frequency heating furnace controller receives the power adjustment signal and adjusts the heating power according to the level rules until it receives the next power adjustment signal or stores a change in the number of elements; S5: The production line terminal controller receives the temperature threshold signal from the temperature acquisition unit. The production line terminal controller then instructs the medium-frequency heating furnace controller to adjust the heating power. The heating power adjustment formula is: Actual heating power = Base power based on the number of pieces - Power reduction corresponding to the threshold temperature. This process continues until the next heating power adjustment signal is received or the number of pieces change signal is stored. The furnace exit temperature threshold is set. When the furnace exit temperature threshold is reached, the power is reduced according to this step to brake the furnace in advance. S6: The production line terminal controller synchronously reads the data from the temperature acquisition unit and the feeding signal until the next action is triggered. The signal that is triggered first, the temperature-reaching discharge signal or the feeding signal, is executed. If the two signals are triggered at the same time, the temperature-reaching discharge signal has higher priority than the feeding signal. When the production line terminal controller receives the feeding signal, it reads the storage position number of the previous workpiece, places the new workpiece in the next numbered position, records the position as stored, increments the number of stored workpieces by 1, and sends the number of stored workpieces data signal to the medium frequency heating furnace controller; the temperature in the temperature threshold signal is greater than the temperature in the temperature discharge signal; The production line terminal controller receives the temperature acquisition signal from the temperature acquisition device, switches the heating power to the heat preservation power, sends a command to the robot to discharge the material, decrements the stored item count by 1, sends a signal to instruct the temperature acquisition device to move to the next position and sends the stored item count data signal to the medium frequency heating furnace controller, and performs a judgment. If the stored item count is ≤1, it jumps to step S2. If the stored item count is >1, it executes steps S2, S3, S4 and S6 simultaneously.

2. The method for heating and temperature control in a medium-frequency furnace for guide arm rolling according to claim 1, characterized in that... The medium-frequency heating furnace has 5 workstations for placing guide arms, and each workstation is numbered on the production line terminal controller. From left to right, the workstations inside the medium-frequency heating furnace are 1-5. The next workstation number after workstation 1 is workstation 2, the next workstation number after workstation 2 is workstation 3, the next workstation number after workstation 3 is workstation 4, the next workstation number after workstation 4 is workstation 5, and the next workstation number after workstation 5 is workstation 1.

3. The method for heating and temperature control in a medium-frequency furnace for guide arm rolling according to claim 1, characterized in that... In step S3, the medium-frequency furnace heating controller has two built-in calculation methods: one is to adjust the heating power based on the stored number of roots change signal, and the other is to adjust the heating power based on the adjustment of the heating power signal. The medium-frequency furnace heating controller executes the command according to the instruction received from the production line terminal controller. The medium-frequency furnace heating controller calls different methods to change the heating power according to the change in the number of roots or the adjustment of the power. When two instructions are received at the same time, the calculation results are superimposed to form the final result.

4. The method for heating and temperature control in a medium-frequency furnace for guide arm rolling according to claim 3, characterized in that... When the number of guide arms changes according to the received instruction, the specific method for changing the heating power is as follows: First, the medium-frequency furnace heating controller determines the basic heating power of the furnace body based on the weight of a single guide arm placed inside the furnace. The formula relationship between the weight of a single guide arm and the basic power is as follows: Then, the medium-frequency furnace heating controller receives the signal indicating a change in the number of guide arms and adjusts the heating power of the furnace body accordingly. The formula relating the number of guide arms added to the furnace body to the heating power of the furnace body is as follows: When the medium-frequency furnace heating controller adjusts the power according to the received instruction, the calculation method based on the power adjustment instruction is as follows:

5. The method for heating and temperature control in a medium-frequency furnace for guide arm rolling according to claim 1, characterized in that: In step S4, the algorithm for calculating the compensation power by the production line terminal controller is as follows: Assume the theoretical heating temperature of the guide arm is A, and the actual measured heating temperature of the guide arm is B; In step S5, the threshold temperature corresponds to a power reduction of 150kW. The furnace exit temperature is set to 980°C to 1020°C, and the temperature threshold is set to 940°C. Once the temperature reaches 940°C, the threshold is reached, and the power is reduced according to this step to brake the circuit in advance.

6. The method for heating and temperature control in a medium-frequency furnace for guide arm rolling according to claim 1, characterized in that: The production line terminal controller's feeding control method can set the feeding interval time for the first three feeds and the feeding interval time for more than three feeds. Setting the feeding interval time is a necessary condition but not a sufficient condition, and the feeding action needs to be determined in conjunction with other signals.

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