A centralized press-fit monitoring system and control method for motor shaft shrink-fitting process

Abstract

The present invention relates to a centralized press-fit monitoring system and control method for a motor shaft heat-fitting process, wherein the system comprises: a high-frequency heating module, which is used to respond to a PLC controller and heat the big end of the motor shaft until the small end of the motor shaft is press-fitted to a preset position; a plurality of sensors, which are used to obtain the temperature of the big end of the motor shaft, the pressure and height of the small end of the motor shaft in real time, and feed them back to the PLC controller; the PLC controller, which is used to perform closed-loop control on the high-frequency heating module based on a preset temperature curve, the power of the high-frequency heating module and the heating time; and to perform closed-loop control on the pressure and height of the press-fitting module based on the pressure and height of the small end of the motor shaft; and the press-fitting module, which is used to press-fit and maintain the pressure on the small end of the motor shaft with a preset clamping force and verticality after the high-frequency heating module reaches a preset temperature. The present invention improves the reliability of the motor shaft heat-fitting process by high-frequency heating of the big end of the motor shaft and pressure control of the small end.

Description

Technical Field

[0001] The invention belongs to the technical field of motor shaft control, and in particular relates to a centralized press-fit monitoring system and a control method for a motor shaft shrink-fit process. Background Art

[0002] For the new energy motor shaft, the high-frequency heater heats the large head to expand it, and then puts the small head at room temperature into it and keeps the pressure, and completes the shrink fitting process after cooling. However, during the high-frequency heating process, the reliability requirements for heating temperature, press-fitting force, press-fitting verticality, pressure holding, press-fitting gap control, etc. are very high.

[0003] High frequency heaters can control the temperature of products by a fixed set of parameters controlled by an internal program. The advantages are simplicity and little external interference. The disadvantage is that they cannot form a closed loop and cannot detect the actual temperature of the product. Non-closed loop systems can generally control the error to 30 degrees, but if the position of the heating coil changes or the ambient temperature changes, the error will increase further. Reliability cannot be guaranteed.

[0004] The product temperature is detected in real time through a real-time external infrared probe and fed back to the high-frequency heater. The high-frequency heater controls the current output of the heater through the temperature feedback from the probe. The advantage is that the actual temperature of the product can be detected. By adjusting the PID, the temperature of the product can be controlled within 5 degrees, which can meet the needs of the system. However, the disadvantage is that it relies entirely on the feedback signal of the infrared probe. If the infrared probe fails, or the infrared is interfered with, or the detection position is shifted, etc., there will be a large temperature fluctuation, causing the system to fail. Summary of the invention

[0005] In order to improve the reliability of centralized press-fitting during the heat-fitting process of a motor shaft, a first aspect of the present invention provides a centralized press-fitting monitoring system for the heat-fitting process of a motor shaft, comprising: a high-frequency heating module, for responding to a control signal of a PLC controller, and heating the big end of the motor shaft until the small end of the motor shaft is press-fitted to a preset position; a plurality of sensors, for acquiring the temperature of the big end of the motor shaft, the pressure and the height of the small end of the motor shaft in real time, and feeding back the temperature of the big end of the motor shaft, the pressure and the height of the small end of the motor shaft to the PLC controller; a PLC controller, for performing closed-loop control of the high-frequency heating module based on a preset temperature curve, the power of the high-frequency heating module and the heating time; and for performing closed-loop control of the pressure and height of the press-fitting module based on the pressure and height of the small end of the motor shaft; a press-fitting module, for responding to a control signal of the PLC controller after the high-frequency heating module reaches a preset temperature, and press-fitting and maintaining pressure on the small end of the motor shaft with a preset clamping force and verticality.

[0006] In some embodiments of the present invention, the PLC controller includes: a temperature control module, which is used to perform closed-loop control of the high-frequency heating module based on a preset temperature curve, the power of the high-frequency heating module and the heating time; a press-fitting control module, which is used to perform closed-loop control of the pressure and height of the press-fitting module based on the pressure and height of the small end of the motor shaft.

[0007] Furthermore, the temperature control module includes: an execution unit, used to send a first control signal to the high-frequency heating module according to multiple preset heating powers and preset heating times, and / or the judgment result of the judgment unit; a reading unit, used to read the temperature value of the high-frequency heating module in real time; a judgment unit, used to match the reading unit temperature value with the preset temperature curve, and send a second control signal to the high-frequency heating module.

[0008] In some embodiments of the present invention, the press-fitting module includes: a press-fitting unit, which is used to press-fit the small head of the motor shaft with a preset clamping force and verticality in response to a control signal of a PLC controller after the high-frequency heating module reaches a preset temperature; and a pressure holding unit, which is used to hold the pressure of the small head of the motor shaft after the press-fitting of the small head of the motor shaft is completed.

[0009] Furthermore, the pressure-maintaining unit includes: a height measuring device for monitoring whether the small head of the motor shaft is displaced by measuring the height of the small head of the motor shaft multiple times.

[0010] In the above-mentioned embodiment, the multiple sensors include: an infrared sensor, which is used to detect the temperature of the high-frequency heating module in real time and feed it back to the PLC controller; a current sensor, which is used to detect the current of the high-frequency heating module in real time and feed it back to the PLC controller; a pressure sensor, which is used to detect the pressure of the small end of the motor shaft in real time and feed it back to the PLC controller.

[0011] The second aspect of the present invention provides a control method for a centralized press-fitting monitoring system for a motor shaft shrink-fitting process, including: acquiring the temperature of the big end of the motor shaft, the pressure and height of the small end of the motor shaft in real time, and feeding back the temperature of the big end of the motor shaft, the pressure and height of the small end of the motor shaft to a PLC controller; based on a preset temperature curve, the power and heating time of the high-frequency heating module, performing closed-loop control on the high-frequency heating module until the small end of the motor shaft is press-fitted to a preset position; after the high-frequency heating module reaches the preset temperature, based on the pressure and height of the small end of the motor shaft, performing closed-loop control on the pressure and height of the press-fitting module, and press-fitting and maintaining pressure on the small end of the motor shaft with a preset clamping force and verticality.

[0012] Furthermore, the closed-loop control of the high-frequency heating module based on the preset temperature curve, the power and heating time of the high-frequency heating module includes: sending a first control signal to the high-frequency heating module according to multiple preset heating powers and preset heating times, and / or the judgment result of the judgment unit; reading the temperature value of the high-frequency heating module in real time; matching the read unit temperature value with the preset temperature curve, and sending a second control signal to the high-frequency heating module.

[0013] The third aspect of the present invention provides an electronic device, comprising: one or more processors; a storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, the one or more processors implement the control method of the centralized press-fitting monitoring system of the motor shaft shrink-fitting process provided in the second aspect of the present invention.

[0014] A fourth aspect of the present invention provides a computer-readable medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the control method of the centralized press-fitting monitoring system for the motor shaft shrink-fitting process provided in the second aspect of the present invention.

[0015] The beneficial effects of the present invention are:

[0016] The present invention combines the temperature information and current information fed back by the high-frequency heater with the process parameters and adds temperature curve detection for intelligent identification and control, thereby ensuring the reliability of the system. In addition, by associating with the product QR code, the process parameters can be saved and analyzed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A basic structural schematic diagram of a control system of a centralized press-fit monitoring system for a motor shaft shrink-fit process in some embodiments of the present invention;

[0018] Figure 2 A schematic diagram of the specific structure of a control system of a centralized press-fit monitoring system for a motor shaft shrink-fit process in some embodiments of the present invention;

[0019] Figure 3 It is a schematic diagram of the temperature control flow of the high-frequency heating module in the motor shaft heat sleeve process in some embodiments of the present invention;

[0020] Figure 4 It is a structural schematic diagram of a control method of a centralized press-fit monitoring system for a motor shaft shrink-fit process in some embodiments of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of an electronic device in some embodiments of the present invention.

[0022] Reference numerals

[0023] 100. High frequency heating module; 200. Sensor; 300. PLC controller; 400. Press-fit module;

[0024] 1. Frame; 2. Motor shaft positioning base; 3. Motor shaft;

[0025] 4. Height probe; 5. Heating coil;

[0026] 6. Spring chuck; 7. Pressure sensor; 8. Press-fit cylinder; 9. Press-fit bracket;

[0027] 10. Coil transformer;

[0028] 11. Height measuring device;

[0029] 12. Infrared temperature sensor;

[0030] 13. Linear guide. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] refer to Figure 1 and Figure 3 In a first aspect of the present invention, a centralized press-fit monitoring system for a motor shaft shrink-fit process is provided, comprising: a high-frequency heating module 100, for responding to a control signal of a PLC controller 300, heating the large end of the motor shaft until the small end of the motor shaft is press-fitted to a preset position; a plurality of sensors 200, for acquiring the temperature of the large end of the motor shaft, the pressure and the height of the small end of the motor shaft in real time, and feeding back the temperature of the large end of the motor shaft, the pressure and the height of the small end of the motor shaft to the PLC controller 300; the PLC controller 300, for performing closed-loop control of the high-frequency heating module 100 based on a preset temperature curve, the power of the high-frequency heating module 100 and the heating time; and for performing closed-loop control of the pressure and the height of the press-fitting module 400 based on the pressure and the height of the small end of the motor shaft; the press-fitting module 400, for responding to a control signal of the PLC controller 300 after the high-frequency heating module 100 reaches a preset temperature, and press-fitting and maintaining the small end of the motor shaft with a preset clamping force and verticality.

[0033] like Figure 2 As shown, the centralized press-fit monitoring system for the motor shaft shrink-fit process is arranged on a frame 1, and the motor shaft positioning base 2 positions the motor shaft; a height probe 4 is arranged directly above the motor shaft; a press-fit module 400 (including a spring chuck 6, a press-fit cylinder 8 and a press-fit bracket) is arranged to maintain a preset verticality with the height probe 4; the press-fit cylinder surrounds the spring chuck, and the power of the heating coil is adjusted through a coil transformer.

[0034] Continue to refer Figure 2 and Figure 3 In some embodiments of the present invention, the PLC controller 300 includes: a temperature control module for performing closed-loop control on the high-frequency heating module 100 based on a preset temperature curve, the power of the high-frequency heating module 100 and the heating time; and a press-fitting control module for performing closed-loop control on the pressure and height of the press-fitting module 400 based on the pressure and height of the small end of the motor shaft.

[0035] Specifically, after the motor shaft 3 (product) is placed, the heating coil 5 is driven by the press cylinder 8 to drop into place, and the heating coil 5 starts heating. The PLC controller 300 reads the temperature signal and current value fed back by the high-frequency heating module 100 through modbusRTU communication, and saves them once every 1S. After reaching the temperature set by the high-frequency heating module 100 and the temperature for 5S, the heating is stopped, and the recorded data is saved to a specific register as comparison data. At the same time, the heating coil 5 rises with the press cylinder 8.

[0036] In the initial heating stage, the infrared probe fails, or the infrared rays are interfered with, or the detection position is shifted. At this time, the temperature change over time in the initial stage can be focused on. In view of this, further, the temperature control module includes: an execution unit, which is used to send a first control signal to the high-frequency heating module 100 according to multiple preset heating powers and preset heating times, and / or the judgment result of the judgment unit; a reading unit, which is used to read the temperature value of the high-frequency heating module 100 in real time; a judgment unit, which is used to match the reading unit temperature value with the preset temperature curve, and send a second control signal to the high-frequency heating module 100.

[0037] refer to Figure 3 , which shows that in each temperature control cycle during the temperature control process of the high-frequency heating module 100, the judgment conditions for stopping heating or alarming are: matching with the standard temperature rise (temperature rise curve) or the temperature is within the qualified range (preset value); from top to bottom, the power control and time control (80% and 3 seconds) of the high-frequency heating module 100 are performed in turn, followed by the control of the heating time alone, and the closed-loop process compares the feedback temperature with the preset temperature, and continues to adjust the heating time and heating power based on the comparison results.

[0038] It is understandable that the high-frequency heating process cannot guarantee the overlap of the heating curves due to the environment and the accuracy of the equipment itself. This solution does not require a temperature rise curve for the heating process, but only requires the reliability of the final heating temperature. Therefore, special control only needs to monitor the changes in the starting and final temperatures.

[0039] In some embodiments of the present invention, the press-fitting module 400 includes: a press-fitting unit, which is used to press-fit the small head of the motor shaft with a preset clamping force and verticality in response to a control signal of the PLC controller 300 after the high-frequency heating module 100 reaches a preset temperature; and a pressure holding unit, which is used to hold the pressure of the small head of the motor shaft after the press-fitting of the small head of the motor shaft is completed.

[0040] Specifically, when the heating temperature is reached, the spring positioning clamp drives the small head product to press down, and its verticality is ensured by the linear guide 13. During the cylinder pressing down, the PLC responds through a high-speed interrupt to read the pressure value change of the pressure sensor. However, during the pressing down process, if the pressure value exceeds the set value, the cylinder will rise immediately to prevent the product from being scrapped due to the failure of the heat-fitting, and also ensure the low-friction heat-fitting of the product. Low-friction heat-fitting can be considered as the product tolerance meets the range and the product is not skewed.

[0041] It should be noted that the present invention integrates heating and press fitting together, and heating can be stopped only after the press fitting is in place, so as to avoid the uncontrollable change of the heat-fitting parameters due to the temperature drop of the large-head product during the transfer process.

[0042] Furthermore, the pressure-maintaining unit includes: a height measuring device 11, which is used to monitor whether the small head of the motor shaft is displaced by measuring the height of the small head of the motor shaft multiple times.

[0043] Specifically, after the pressure is pressed into place, the pressure holding is started and the pressure holding pressure is monitored. This can prevent the influence of air pressure fluctuations on the pressure holding pressure. Experiments have shown that when the pressure becomes smaller and the outer diameter of the motor shaft shrinks, it is possible that the small head will withdraw a small distance and a gap will be generated. After starting the pressure holding, the height measuring device 11 extends out with the cylinder, the probe descends, and the current height is read. When the pressure holding time is about to be reached, measure again. Read the probe values ​​twice, compare them, and monitor whether the small head product has displacement.

[0044] In the above embodiment, the multiple sensors 200 include: an infrared sensor 12, which is used to detect the temperature of the high-frequency heating module 100 in real time and feed it back to the PLC controller 300; a current sensor, which is used to detect the current of the high-frequency heating module 100 in real time and feed it back to the PLC controller 300; a pressure sensor 7, which is used to detect the pressure of the motor shaft head in real time and feed it back to the PLC controller 300. It can be understood that the parameters in the above temperature control and press-fitting process can be associated with the product QR code (identification) to realize the storage and analysis of the process parameters.

[0045] Example 2

[0046] refer to Figure 4According to a second aspect of the present invention, a control method for a centralized press-fitting monitoring system for a motor shaft shrink-fitting process is provided, including: S100. Real-time acquisition of the temperature of the motor shaft big end, the pressure and height of the motor shaft small end, and feedback of the temperature of the motor shaft big end, the pressure and height of the motor shaft small end to a PLC controller; S200. Based on a preset temperature curve, the power and heating time of the high-frequency heating module, closed-loop control of the high-frequency heating module is performed until the small end of the motor shaft is press-fitted to a preset position; S300. After the high-frequency heating module reaches the preset temperature, closed-loop control of the pressure and height of the press-fitting module is performed based on the pressure and height of the motor shaft small end, and the small end of the motor shaft is press-fitted and pressure-maintained with a preset clamping force and verticality.

[0047] Further, in step S200, the closed-loop control of the high-frequency heating module based on the preset temperature curve, the power and heating time of the high-frequency heating module includes:

[0048] S201. According to a plurality of preset heating powers and preset heating times, and / or a determination result of a determination unit, a first control signal is sent to the high-frequency heating module;

[0049] S202. Read the temperature value of the high-frequency heating module in real time;

[0050] S203. Match the reading unit temperature value with a preset temperature curve, and send a second control signal to the high-frequency heating module.

[0051] Example 3

[0052] refer to Figure 5 According to the third aspect of the present invention, an electronic device is provided, comprising: one or more processors; a storage device for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the control method of the centralized press-fitting monitoring system of the motor shaft shrink-fitting process according to the second aspect of the present invention.

[0053] The electronic device 500 may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 501, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 502 or a program loaded from a storage device 508 into a random access memory (RAM) 503. In the RAM 503, various programs and data required for the operation of the electronic device 500 are also stored. The processing device 501, the ROM 502, and the RAM 503 are connected to each other via a bus 504. An input / output (I / O) interface 505 is also connected to the bus 504.

[0054] Typically, the following devices may be connected to the I / O interface 505: an input device 506 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 507 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 508 including, for example, a hard disk, etc.; and a communication device 509. The communication device 509 may allow the electronic device 500 to communicate with other devices wirelessly or by wire to exchange data. Although Figure 5 The electronic device 500 is shown with various devices, but it should be understood that it is not required to implement or possess all the devices shown. More or fewer devices may be implemented or possessed instead. Figure 5 Each block shown in the figure may represent one device, or may represent multiple devices as required.

[0055] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through a communication device 509, or installed from a storage device 508, or installed from a ROM 502. When the computer program is executed by the processing device 501, the above functions defined in the method of the embodiment of the present disclosure are executed. It should be noted that the computer-readable medium described in the embodiment of the present disclosure can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to, an electrical connection with one or more conductors, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In an embodiment of the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, an apparatus, or a device. In an embodiment of the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, in which a computer-readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in combination with an instruction execution system, an apparatus, or a device. The program code embodied on the computer readable medium may be transmitted using any appropriate medium, including but not limited to: wire, optical cable, RF (radio frequency), etc., or any suitable combination of the foregoing.

[0056] The computer-readable medium may be included in the electronic device, or may exist independently without being installed in the electronic device. The computer-readable medium carries one or more computer programs. When the one or more programs are executed by the electronic device, the electronic device:

[0057] Computer program code for performing the operations of embodiments of the present disclosure may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, Python, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on a user's computer, partially on a user's computer, as a separate software package, partially on a user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0058] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A centralized press-fit monitoring system for the shrink-fit process of a motor shaft, characterized in that: include: A high-frequency heating module, used for responding to a control signal of a PLC controller to heat the large end of the motor shaft until the small end of the motor shaft is pressed into a preset position; Multiple sensors are used to obtain the temperature of the motor shaft big end, the pressure and height of the motor shaft small end in real time, and feed back the temperature of the motor shaft big end, the pressure and height of the motor shaft small end to the PLC controller; A PLC controller, used for performing closed-loop control on the high-frequency heating module based on a preset temperature curve, the power of the high-frequency heating module and the heating time; And based on the pressure and height of the small end of the motor shaft, the pressure and height of the press-fitting module are closed-loop controlled; The PLC controller includes: a temperature control module, which is used to perform closed-loop control on the high-frequency heating module based on a preset temperature curve, the power and heating time of the high-frequency heating module; wherein the temperature control module includes: an execution unit, which is used to send a first control signal to the high-frequency heating module according to a plurality of preset heating powers and preset heating times, and / or a judgment result of a judgment unit; a reading unit, which is used to read the temperature value of the high-frequency heating module in real time; a judgment unit, which is used to match the reading unit temperature value with the preset temperature curve, and send a second control signal to the high-frequency heating module, wherein the closed-loop control is to compare the feedback temperature with the preset temperature, and continue to adjust the heating time and heating power according to the comparison result; in each temperature control cycle, the judgment condition for stopping heating or alarming is: matching with the temperature rise curve or the temperature being within the preset value; from top to bottom, the power control and time control of the high-frequency heating module are in turn, followed by controlling the heating time alone, and the closed-loop process is to compare the feedback temperature with the preset temperature, and continue to adjust the heating time and heating power according to the comparison result; A press-fit control module, which is used to perform closed-loop control of the pressure and height of the press-fit module based on the pressure and height of the motor shaft head; The press-fitting module is used to press-fit and maintain the pressure on the small head of the motor shaft with a preset clamping force and verticality in response to the control signal of the PLC controller after the high-frequency heating module reaches the preset temperature.

2. The centralized press-fit monitoring system for the motor shaft shrink-fit process according to claim 1 is characterized in that: The press-fit module comprises: A press-fit unit, used to press-fit the small head of the motor shaft with a preset clamping force and verticality in response to a control signal of a PLC controller after the high-frequency heating module reaches a preset temperature; The pressure holding unit is used to hold the pressure of the small head of the motor shaft after the small head of the motor shaft is press-fitted.

3. The centralized press-fit monitoring system for the motor shaft shrink-fit process according to claim 2 is characterized in that: The pressure maintaining unit comprises: The height measuring device is used to monitor whether the small head of the motor shaft is displaced by measuring the height of the small head of the motor shaft multiple times.

4. The centralized press-fit monitoring system for the motor shaft shrink-fit process according to claim 1 is characterized in that: The plurality of sensors include: Infrared sensor, used to detect the temperature of the high-frequency heating module in real time and feed it back to the PLC controller; Current sensor, used to detect the current of the high-frequency heating module in real time and feed it back to the PLC controller; The pressure sensor is used to detect the pressure of the motor shaft head in real time and feed it back to the PLC controller.

5. A control method for a centralized press-fit monitoring system for a motor shaft shrink-fit process, characterized in that: include: Acquire the temperature of the motor shaft big end, the pressure and height of the motor shaft small end in real time, and feed back the temperature of the motor shaft big end, the pressure and height of the motor shaft small end to the PLC controller; Based on the preset temperature curve, the power and heating time of the high-frequency heating module, the high-frequency heating module is closed-loop controlled until the small head of the motor shaft is pressed into a preset position; according to multiple preset heating powers and preset heating times, and / or the judgment result of the judgment unit, a first control signal is sent to the high-frequency heating module; Read the temperature value of the high-frequency heating module in real time; The temperature value of the reading unit is matched with the preset temperature curve, and a second control signal is sent to the high-frequency heating module; in each temperature control cycle, the judgment conditions for stopping heating or alarming are: matching with the temperature rise curve or the temperature is within the preset value; from top to bottom, the power control and time control of the high-frequency heating module are in turn, followed by the control of the heating time alone, and the closed-loop process is to compare the feedback temperature with the preset temperature, and continue to adjust the heating time and heating power according to the comparison result; After the high-frequency heating module reaches the preset temperature, the pressure and height of the press-fitting module are closed-loop controlled based on the pressure and height of the small head of the motor shaft, and the small head of the motor shaft is press-fitted and pressure-maintained with a preset clamping force and verticality.

6. An electronic device comprising: one or more processors; A storage device for storing one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the control method of the centralized press-fitting monitoring system of the motor shaft shrink-fitting process as described in any one of claims 4 to 5.

7. A computer readable medium having a computer program stored thereon, wherein: When the computer program is executed by a processor, the control method of the centralized press-fitting monitoring system for the motor shaft shrink-fitting process as described in any one of claims 4 to 5 is implemented.

Images