Lifting control method and system for underfloor wheel machining

Abstract

The invention relates to a lifting control method and system for underfloor wheel machining, and belongs to the technical field of underfloor wheel machining. The control method comprises the steps that a real-time pressure value in the underfloor wheel machining process is received; after the pressure changes, the current pressure change difference value is obtained, and the current pressure change difference value is equal to the difference between the current pressure value and the machining initial pressure value; according to the current pressure change difference value, the current displacement amount of the underfloor wheel is determined; according to the current displacement, the number of rotation turns of a screw rod is determined; according to the number of rotation turns of the screw rod, the operation time length of the motor is determined; the motor drives the screw rod to rotate, and the screw rod drives the non-falling wheel to move. The machining method has the beneficial effect that the machining precision of the underfloor wheel is improved.

Description

Technical Field

[0001] The present application relates to the technical field of underfloor wheel machining, and in particular to a lifting control method and system for underfloor wheel machining. Background Art

[0002] When processing the underfloor wheel, the underfloor wheel is mounted on a lifting device; as the underfloor wheel is processed, the lifting device is required to continuously raise the underfloor wheel so that the underfloor wheel is always in contact with the workpiece, so that the underfloor wheel can be processed normally.

[0003] At present, the adjustment of the underfloor wheels is mostly done by experienced and skilled operators controlling the movement of the lifting device through a remote control so that the underfloor wheels are always in contact with the workpiece. Since the error of manual control is relatively large, it is easy to affect the processing accuracy of the underfloor wheels, resulting in reduced processing accuracy. Summary of the invention

[0004] In order to improve the machining accuracy of the underfloor wheel, the present application provides a underfloor wheel machining lifting control method and system.

[0005] In the first aspect, the present application provides a lifting control method for underfloor wheel processing, which adopts the following technical solution: A lifting control method for underfloor wheel processing, comprising: Receive real-time pressure values ​​during underfloor wheel processing; After the pressure changes, the current pressure change difference is obtained, where the current pressure change difference=|current pressure value-processing initial pressure value|; Determining a current displacement of the non-under-floor wheel according to the current pressure change difference; According to the current displacement, determining the number of turns the screw should rotate; The running time of the motor is determined according to the number of revolutions of the screw rod; the motor drives the screw rod to rotate, and the screw rod drives the movement of the non-falling wheel.

[0006] By adopting the above technical solution, during the under-floor wheel processing, if the pressure changes, it is necessary to drive the under-floor wheel to move. Therefore, by obtaining the absolute value of the difference between the current pressure value and the initial processing pressure value, it is determined how much the current pressure has changed, and then according to the current pressure change difference, the current displacement of the under-floor wheel is determined, and then the number of turns the screw should be rotated is determined, and finally the running time of the motor is determined, so as to realize automatic adjustment of the position of the under-floor wheel according to the pressure change, so that the under-floor wheel is always in contact with the workpiece, thereby improving the processing accuracy of the under-floor wheel.

[0007] Optionally, the step of determining the current displacement of the underfloor wheel according to the current pressure change difference comprises: Acquire historical adjustment data of historical non-underfloor wheel processing, wherein the historical adjustment data includes historical pressure values ​​and adjustment displacements of the non-underfloor wheel during each adjustment; Based on the historical adjustment data, fitting a correlation curve of the pressure difference and the displacement; After obtaining the current pressure change difference, the current displacement is obtained according to the correlation curve.

[0008] By adopting the above technical solution, since the displacement of the underfloor wheel is related to the pressure value during the underfloor wheel processing, the correlation between the displacement and the pressure value is fitted into a correlation curve through historical processing data, so that in the subsequent underfloor wheel processing, the displacement of the underfloor wheel that needs to be adjusted can be determined directly according to the pressure change.

[0009] Optionally, the specific step of fitting a correlation curve of pressure difference and displacement based on the historical adjustment data includes: Construct a two-dimensional rectangular coordinate system, where the horizontal axis is the pressure change difference and the vertical axis is the displacement; Get multiple historical under-the-wheel machining coordinate sets; Each of the coordinate sets is fitted into a corresponding primary correlation curve; Screening a plurality of coordinate points that the primary correlation curves pass through in common; According to the selected coordinate points, the final correlation curve is fitted.

[0010] By adopting the above technical solution, a plurality of coordinate sets of historical non-falling wheel processing are obtained, and each coordinate set is fitted into a primary association curve. Then, the coordinate points that the plurality of primary association curves pass through are screened out, and the final fitting is performed based on the screened coordinate points, thereby improving the accuracy of the association curve.

[0011] Optionally, the step of determining the number of turns the screw should rotate according to the current displacement includes: Get the screw lead; According to the stroke formula, the screw rotation angle is obtained; the stroke formula is displacement = screw lead * screw rotation angle; The screw rotation angle is converted into the number of screw rotations.

[0012] Optionally, the step of determining the running time of the motor according to the number of revolutions that the screw should rotate includes: Get the unit time length of the motor running when the screw rotates one circle; According to the time formula, the working time that the motor should run is obtained, and the time formula is working time = unit time * number of screw rotations.

[0013] Optionally, obtaining the working time that the motor should run includes: Send a connection signal; Based on the connection signal, driving the screw to connect with the motor output shaft; After the motor has reached the working time, a disconnection signal is sent; Based on the disconnection signal, the screw is driven to be disconnected from the motor output shaft.

[0014] By adopting the above technical solution, since the non-falling wheel processing is a continuous processing process, the position adjustment of the non-falling wheel will be more frequent; and since the power of the motor is relatively large when it is instantaneously started, and if the motor needs to be started and stopped every time, it is easy to reduce the service life of the motor. Therefore, during the non-falling wheel processing, the motor is kept running, and when adjustment is needed, it is only necessary to connect the screw rod to the motor output shaft. During this process, the motor operating power is stable.

[0015] In the second aspect, the present application provides a non-under-the-hood wheel processing lifting control system, which adopts the following technical solutions: A lifting control system for underfloor wheel processing, comprising: Motor; The motor is used to drive the screw to rotate; the non-falling wheel is threadedly connected to the screw; Pressure sensor, used to detect the pressure during under-feed wheel processing and send real-time pressure value; A pressure value receiving module is used to receive the real-time pressure value during the underfloor wheel processing; A pressure change difference acquisition module is used to acquire a current pressure change difference after the pressure changes, wherein the current pressure change difference = |current pressure value - initial processing pressure value|; A displacement determination module, used to determine the current displacement of the non-under-floor wheel according to the current pressure change difference; A screw rotation number determination module is used to determine the number of rotations the screw should rotate according to the current displacement; The working time determination module is used to determine the working time that the motor should run according to the number of revolutions that the screw should rotate.

[0016] By adopting the above technical solution, during the under-floor wheel processing, if the pressure changes, it is necessary to drive the under-floor wheel to move. Therefore, by obtaining the absolute value of the difference between the current pressure value and the initial processing pressure value, it is determined how much the current pressure has changed, and then according to the current pressure change difference, the current displacement of the under-floor wheel is determined, and then the number of turns the screw should be rotated is determined, and finally the running time of the motor is determined, so as to realize automatic adjustment of the position of the under-floor wheel according to the pressure change, so that the under-floor wheel is always in contact with the workpiece, thereby improving the processing accuracy of the under-floor wheel.

[0017] Optionally, the control system further includes: A data acquisition module, used to acquire historical adjustment data of historical non-underfloor wheel processing, wherein the historical adjustment data includes historical pressure values ​​and adjustment displacement of the non-underfloor wheel at each adjustment; The curve fitting module is used to fit a correlation curve between the pressure difference and the displacement based on the historical adjustment data; the displacement determination module is used to obtain the current displacement according to the correlation curve after the pressure change difference acquisition module obtains the current pressure change difference.

[0018] Optionally, the control system further includes: A coordinate construction module is used to construct a two-dimensional rectangular coordinate system, where the horizontal coordinate is the pressure change difference and the vertical coordinate is the displacement; A coordinate set acquisition module is used to acquire a plurality of coordinate sets of historical non-under-the-wheel machining; the curve fitting module fits each of the coordinate sets into a corresponding primary correlation curve; The screening module is used to screen out the coordinate points that the multiple initial correlation curves pass through together; the curve fitting module is used to fit the final correlation curve according to the screened coordinate points.

[0019] Optionally, the control system further includes: A signal sending module, used to send a connection signal, and send a disconnection signal after the motor working time is reached; a driving component, which drives the screw rod to connect with the motor output shaft in response to the connection signal, and drives the screw rod to disconnect with the motor output shaft in response to the disconnection signal; The driving component comprises: an electromagnet, coaxially fixedly connected to the output shaft of the motor; the electromagnet is energized in response to the connection signal, and is de-energized in response to the disconnection signal; A connecting rod, one end of which is coaxially inserted into the screw rod and is slidably connected to the screw rod; The magnetic ring is coaxially fixedly connected to the other end of the connecting rod.

[0020] In summary, the present application has at least the following beneficial effects: The purpose of receiving the real-time pressure value during the non-floating wheel processing, obtaining the current pressure change difference, and determining the current displacement of the non-floating wheel, and then determining the number of turns the screw should rotate, and finally determining the running time of the motor is to automatically adjust the position of the non-floating wheel according to the pressure change, so that the non-floating wheel is always in contact with the workpiece, thereby improving the processing accuracy of the non-floating wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a flowchart of an embodiment of the method of the present application; Figure 2 It is a flowchart of the specific steps of S130; Figure 3 It is a flowchart of the specific steps of S140; Figure 4 It is a flowchart of the steps that can be executed after obtaining the working time that the motor should run; Figure 5 It is a structural block diagram of an implementation method of the first embodiment of the system of the present application; Figure 6 This is a schematic diagram of the structure of the connection between the screw rod and the motor output shaft of the present application; Figure 7 It is a structural block diagram of another implementation method of the system embodiment of the present application.

[0022] Explanation of the accompanying drawings: 100, motor; 200, screw; 300, pressure sensor; 401, pressure value receiving module; 402, pressure change difference acquisition module; 403, displacement determination module; 404, screw rotation number determination module; 405, working time determination module; 406, data acquisition module; 407, coordinate construction module; 408, coordinate set acquisition module; 409, curve fitting module; 410, screening module; 411, screw lead acquisition module; 412, rotation angle acquisition module; 413, conversion module; 414, duration acquisition module; 415, signal sending module; 500, driving component; 510, electromagnet; 520, connecting rod; 530, magnetic ring; 540, carbon brush; 550, wire; 560, switch. DETAILED DESCRIPTION

[0023] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will be combined with the appended drawings of the embodiments of the present invention. Figure 1 -Attached Figure 7 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. 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.

[0024] The first embodiment of the present application discloses a method for controlling the lifting of a non-underfloor wheel processing. Figure 1 As an implementation of the control method, the control method may include S110-S150: S110, receiving the real-time pressure value during the underfloor wheel processing; S120, after the pressure changes, obtaining the current pressure change difference; S130, determining the current displacement of the non-under-floor wheel according to the current pressure change difference; S140, determining the number of revolutions that the screw 200 should rotate according to the current displacement; S150, determining the operating time of the motor 100 according to the number of revolutions that the screw 200 should rotate; the motor 100 drives the screw 200 to rotate, and the screw 200 drives the movement of the non-falling wheel.

[0025] Specifically, a pressure sensor 300 can be arranged at the processing position, and the specific position of the pressure sensor 300 can be adjusted according to the actual situation, in order to detect the real-time pressure value during the non-under-the-wheel processing. The current pressure change difference = |current pressure value-processing initial pressure value|, and the processing initial pressure value refers to the pressure when the non-under-the-wheel abuts against the workpiece before the non-under-the-wheel processing, after the non-under-the-wheel is adjusted.

[0026] Reference Figure 2 For S130, the specific steps may include S131-S133: S131, obtaining historical adjustment data of historical underfloor wheel processing; S132, fitting a correlation curve between the pressure difference and the displacement based on the historical adjustment data; S133, after obtaining the current pressure change difference, obtain the current displacement according to the correlation curve.

[0027] Specifically, the historical adjustment data may include the historical pressure value and adjustment displacement corresponding to each adjustment of the non-floating wheel position during a certain non-floating wheel processing in history; the historical pressure change difference at that location is obtained based on a certain historical pressure value and the corresponding initial processing pressure value. Construct a two-dimensional rectangular coordinate system, use the pressure change difference as the horizontal coordinate, and the displacement as the vertical coordinate; each non-floating wheel adjustment corresponds to a coordinate, and after the non-floating wheel processing is completed, obtain the coordinate set, so as to fit and generate a correlation curve in the two-dimensional rectangular coordinate system, and the correlation curve can be regarded as the initial correlation curve. After obtaining the initial correlation curves corresponding to multiple historical non-floating wheel processing through the aforementioned method, the multiple initial correlation curves are judged, and the coordinate points that pass through together are selected, and the final correlation curve is fitted and generated based on the selected multiple coordinate points.

[0028] If the selected coordinate points do not include the final processing point, the average point coordinates of the corresponding coordinates of the final processing points of multiple initial association curves are calculated, and the final association curve is fitted based on the average point coordinates and the selected multiple coordinate points. The average point coordinates refer to (the average value of the sum of the horizontal coordinates of the final processing points of multiple initial association curves, and the average value of the sum of the vertical coordinates).

[0029] Reference Figure 3 For S140, the specific steps may include S141-S143: S141, obtaining the lead of the screw 200; S142, according to the stroke formula, obtain the rotation angle of the screw 200; the stroke formula is displacement = screw 200 lead * screw 200 rotation angle; S143, converting the rotation angle of the screw 200 into the number of revolutions of the screw 200.

[0030] Specifically, the lead of the screw 200 refers to the pitch of the threads on the screw 200 , and one rotation of the screw 200 is 360°.

[0031] After S143, when the motor 100 is running stably, the unit time length of the motor 100 when the screw 200 rotates one circle can be obtained in advance, for example, by making test records in advance, or obtaining it based on historical data; and according to the time length formula, the working time that the motor 100 should run is obtained; the time length formula is working time = unit time length * number of rotations of the screw 200.

[0032] Reference Figure 4 After obtaining the working time that the motor 100 should run, S210-S240 can be executed: S210, sending a connection signal; S220, based on the connection signal, driving the screw rod 200 to connect with the output shaft of the motor 100; S230, after the motor 100 has reached the running working time, a disconnection signal is sent; S240 , based on the disconnection signal, the driving screw 200 is disconnected from the output shaft of the motor 100 .

[0033] Specifically, during the non-under-wheel processing, the motor 100 continues to run, and the screw 200 is separated from the output shaft of the motor 100. By setting the driving component 500, after the driving component 500 receives a connection signal, the driving screw 200 is connected to the output shaft of the motor 100, and after the driving component 500 receives a disconnection signal, the driving screw 200 is separated from the output shaft of the motor 100.

[0034] An application scenario is as follows: Receive the real-time pressure value during the non-falling wheel processing process, and when the current pressure value is different from the initial processing pressure value, obtain the current pressure change difference, and then bring the current pressure change difference into the final correlation curve after fitting to obtain the current displacement; obtain the rotation angle of the screw 200 according to the stroke formula, and convert the rotation angle of the screw 200 into the number of rotations of the screw 200, and obtain the running working time of the motor 100 according to the time formula; then send a connection signal, and in response to the connection signal, drive the screw 200 to connect with the output shaft of the motor 100; after the running working time of the motor 100 is reached, send a disconnection signal, and in response to the disconnection signal, drive the screw 200 to disconnect from the output shaft of the motor 100.

[0035] Based on the above method embodiment, the second embodiment of the present application discloses a non-underfloor wheel processing lifting control system. Figure 5 and Figure 6 As an implementation of the control system, the control system may include: Motor 100; The screw 200, the motor 100 is used to drive the screw 200 to rotate; the non-falling wheel is threadedly connected to the screw 200; The pressure sensor 300 is used to detect the pressure during the underfloor wheel processing and send the real-time pressure value; The pressure value receiving module 401 is used to receive the real-time pressure value during the underfloor wheel processing; The pressure change difference acquisition module 402 is used to acquire the current pressure change difference after the pressure changes, where the current pressure change difference = |current pressure value - initial processing pressure value|; The displacement determination module 403 is used to determine the current displacement of the non-under-wheel according to the current pressure change difference; The screw rotation number determination module 404 is used to determine the number of rotations that the screw 200 should rotate according to the current displacement; The working time determination module 405 is used to determine the working time that the motor 100 should run according to the number of revolutions that the screw 200 should rotate.

[0036] The control system may also include: A data acquisition module 406 is used to acquire historical adjustment data of the underfloor wheel processing, wherein the historical adjustment data includes the historical pressure value and the adjustment displacement of the underfloor wheel at each adjustment; A coordinate construction module 407 is used to construct a two-dimensional rectangular coordinate system, where the horizontal coordinate is the pressure change difference and the vertical coordinate is the displacement; A coordinate set acquisition module 408 is used to acquire a plurality of coordinate sets of historical underfloor wheel machining; The curve fitting module 409 is used to fit each coordinate set into a corresponding primary correlation curve; The screening module 410 is used to screen out coordinate points that are passed through by multiple initial correlation curves. The curve fitting module 409 is used to fit the final correlation curve according to the screened coordinate points.

[0037] In addition, the control system may also include: The screw lead acquisition module 411 is used to acquire the lead of the screw 200; The rotation angle acquisition module 412 is used to obtain the rotation angle of the screw 200 according to the stroke formula, and the stroke formula is displacement = lead of the screw 200 * rotation angle of the screw 200; A conversion module 413, used to convert the rotation angle of the screw 200 into the number of revolutions of the screw 200; The duration acquisition module 414 is used to obtain in advance the unit duration of the motor 100 when the screw 200 rotates one circle when the motor 100 runs stably; the working duration determination module 405 is used to obtain the working duration that the motor 100 should run according to the duration formula; the duration formula is working duration = unit duration * number of rotations of the screw 200.

[0038] Reference Figure 7 As another embodiment of the control system, the control system may include: The signal sending module 415 is used to send a connection signal, and send a disconnection signal after the working time of the motor 100 is reached; The driving component 500 drives the screw rod 200 to connect with the output shaft of the motor 100 in response to the connection signal, and drives the screw rod 200 to disconnect with the output shaft of the motor 100 in response to the disconnection signal.

[0039] Among them, the modules disclosed in this application can all be integrated into a controller, or an electronic device, and the electronic device can be a terminal including a memory and a processor, such as a computer, a smart phone, etc.

[0040] Reference Figure 6 , the driving component 500 may include an electromagnet 510, a connecting rod 520 and a magnetic ring 530. Among them, the electromagnet 510 is coaxially fixedly connected to the output shaft of the motor 100; a carbon brush 540 is coaxially connected to the output shaft of the motor 100, and the carbon brush 540 abuts against the electromagnet 510: the carbon brush 540 is connected to the external power supply through a wire 550, and the wire 550 is connected to a switch 560 for controlling the on and off of the circuit. After the switch 560 receives a connection signal, the switch 560 is closed, the circuit is turned on, and the carbon brush 540 is energized, thereby energizing the electromagnet 510 to generate magnetic force; after the switch 560 receives a disconnection signal, it is disconnected, the circuit is not turned on, and the electromagnet 510 is not energized. One end of the connecting rod 520 is coaxially penetrated in the screw 200 and is slidably connected to the screw 200; it can be understood as being connected in a spline manner. The magnetic ring 530 is coaxially fixedly connected to the other end of the connecting rod 520. After the electromagnet 510 is energized, the magnetic ring 530 is attracted, and the connecting rod 520 can abut against the output shaft of the motor 100, so that when the output shaft of the motor 100 rotates, the magnetic ring 530 is driven to rotate, so that the connecting rod 520 drives the synchronous rotation of the screw rod 200. It should be noted that a reset spring is installed in the screw rod 200, and the reset spring is connected to the connecting rod 520 to achieve the reset of the connecting rod 520.

[0041] The implementation of this embodiment may be: The pressure value receiving module 401 receives the real-time pressure value during the non-falling wheel processing. When the current pressure value is different from the initial processing pressure value, the pressure change difference acquisition module 402 acquires the current pressure change difference, and then the displacement determination module 403 brings the current pressure change difference into the final correlation curve after fitting to obtain the current displacement; the rotation angle acquisition module 412 obtains the rotation angle of the screw 200 according to the stroke formula, the conversion module 413 converts the rotation angle of the screw 200 into the number of revolutions of the screw 200, and the duration acquisition module 414 obtains the running working time of the motor 100 according to the duration formula; then the signal sending module 415 sends a connection signal, the electromagnet 510 is energized, and the magnetic ring 530 is attracted, so that the screw 200 is connected to the output shaft of the motor 100; after the running working time of the motor 100 is reached, the signal sending module 415 sends a disconnection signal, the electromagnet 510 is powered off, and the magnetic ring 530 is disengaged, so that the screw 200 is disconnected from the output shaft of the motor 100.

[0042] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application in sequence. Any feature disclosed in this specification (including the abstract and drawings), unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. A lifting control method for underfloor wheel processing, characterized in that: include: Receive real-time pressure values ​​during underfloor wheel processing; After the pressure changes, the current pressure change difference is obtained, where the current pressure change difference=|current pressure value-processing initial pressure value|; Determining a current displacement of the non-under-floor wheel according to the current pressure change difference; Determining the number of turns the screw rod (200) should rotate according to the current displacement; The operating time of the motor (100) is determined according to the number of revolutions that the screw rod (200) should rotate; the motor (100) drives the screw rod (200) to rotate, and the screw rod (200) drives the movement of the non-underfloor wheel.

2. The method for controlling the lifting of underfloor wheel processing according to claim 1, characterized in that: The step of determining the current displacement of the underfloor wheel according to the current pressure change difference comprises: Acquire historical adjustment data of historical non-underfloor wheel processing, wherein the historical adjustment data includes historical pressure values ​​and adjustment displacements of the non-underfloor wheel during each adjustment; Based on the historical adjustment data, fitting a correlation curve of the pressure difference and the displacement; After obtaining the current pressure change difference, the current displacement is obtained according to the correlation curve.

3. The lifting control method for underfloor wheel machining according to claim 2, characterized in that: The specific steps of fitting a correlation curve of pressure difference and displacement based on the historical adjustment data include: Construct a two-dimensional rectangular coordinate system, where the horizontal axis is the pressure change difference and the vertical axis is the displacement; Get multiple historical under-the-wheel machining coordinate sets; Each of the coordinate sets is fitted into a corresponding primary correlation curve; Screening a plurality of coordinate points that the primary correlation curves pass through in common; According to the selected coordinate points, the final correlation curve is fitted.

4. The lifting control method for underfloor wheel machining according to claim 1, characterized in that: The step of determining the number of turns that the screw rod (200) should rotate according to the current displacement comprises: Get the lead of the screw (200); According to the stroke formula, the rotation angle of the screw (200) is obtained; the stroke formula is displacement = lead of the screw (200) * rotation angle of the screw (200); The rotation angle of the screw (200) is converted into the number of revolutions of the screw (200).

5. The lifting control method for underfloor wheel machining according to claim 4, characterized in that: The step of determining the operating time of the motor (100) according to the number of revolutions that the screw rod (200) should rotate comprises: Get the unit time length of the motor (100) running when the screw (200) rotates one circle; According to the time formula, the working time that the motor (100) should run is obtained, and the time formula is working time = unit time * number of rotations of the screw (200).

6. The lifting control method for underfloor wheel machining according to claim 1, characterized in that: The step of obtaining the operating time of the motor (100) includes: Send a connection signal; Based on the connection signal, driving the screw rod (200) to connect with the output shaft of the motor (100); After the motor (100) has run for a certain period of time, a disconnection signal is sent; Based on the disconnection signal, the screw rod (200) is driven to be disconnected from the output shaft of the motor (100).

7. A lifting control system for non-underfloor wheel processing, characterized in that: include: motor(100); A screw rod (200), wherein the motor (100) is used to drive the screw rod (200) to rotate; The non-falling wheel is threadedly connected to the screw rod (200); A pressure sensor (300) is used to detect the pressure during under-feed wheel processing and send a real-time pressure value; A pressure value receiving module (401) is used to receive the real-time pressure value during the underfloor wheel processing; A pressure change difference acquisition module (402) is used to acquire a current pressure change difference after the pressure changes, wherein the current pressure change difference = |current pressure value - initial processing pressure value|; A displacement determination module (403) is used to determine the current displacement of the non-underwheel according to the current pressure change difference; A screw rotation number determination module (404), used to determine the number of rotations the screw (200) should rotate according to the current displacement; The working time determination module (405) is used to determine the working time that the motor (100) should run according to the number of revolutions that the screw rod (200) should rotate.

8. The lifting control system for underfloor wheel machining according to claim 7, characterized in that: The control system further comprises: A data acquisition module (406) is used to acquire historical adjustment data of the underfloor wheel processing, wherein the historical adjustment data includes the historical pressure value and the adjustment displacement of the underfloor wheel at each adjustment; The curve fitting module (409) is used to fit a correlation curve between the pressure difference and the displacement based on the historical adjustment data; the displacement determination module (403) is used to obtain the current displacement according to the correlation curve after the pressure change difference acquisition module (402) obtains the current pressure change difference.

9. The lifting control system for underfloor wheel machining according to claim 8, characterized in that: The control system further comprises: A coordinate construction module (407) is used to construct a two-dimensional rectangular coordinate system, wherein the horizontal coordinate is the pressure change difference and the vertical coordinate is the displacement; The coordinate set acquisition module (408) is used to acquire a plurality of coordinate sets of historical non-under-wheel processing; the curve fitting module (409) fits each of the coordinate sets into a corresponding primary correlation curve; The screening module (410) is used to screen out coordinate points that the multiple initial correlation curves pass through together; the curve fitting module (409) is used to fit a final correlation curve based on the screened coordinate points.

10. The lifting control system for underfloor wheel machining according to claim 7, characterized in that: The control system further comprises: A signal sending module (415) is used to send a connection signal, and after the working time of the motor (100) is reached, send a disconnection signal; a driving component (500) that drives the screw rod (200) to connect with the output shaft of the motor (100) in response to the connection signal, and drives the screw rod (200) to disconnect with the output shaft of the motor (100) in response to the disconnection signal; The driving component (500) comprises: an electromagnet (510) coaxially fixedly connected to an output shaft of the motor (100); the electromagnet (510) is powered on in response to the connection signal, and is powered off in response to the disconnection signal; A connecting rod (520), one end of which is coaxially inserted into the screw rod (200) and is slidably connected to the screw rod (200); The magnetic ring (530) is coaxially fixedly connected to the other end of the connecting rod (520).

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