Control method and control device for improving automobile coating cavity wax filling process

Abstract

The invention discloses a control method and a control device for improving an automobile coating cavity wax filling process. The method comprises the steps that the wax film thickness of a target vehicle body is obtained; comparing the thickness of the wax film with a threshold range to obtain a comparison result; and a control strategy set is generated based on the comparison result, and the control strategy set comprises at least one of the following strategies: a strategy for controlling the passing speed of the target vehicle body and a strategy for controlling spraying parameters of atomized wax spraying. According to the control method, by intelligently adjusting the passing speed of the vehicle body and the spraying parameters of atomized wax spraying, the forming thickness of the wax film can be accurately controlled, wax layers needing to be additionally cleaned are effectively reduced, the labor cost is reduced, meanwhile, the process period is shortened, and the overall operation efficiency of a production line is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of body wax spraying, and in particular, to a control method and a control device for improving the cavity wax injection process of automobile painting. Background Art

[0002] In automobile manufacturing, in order to improve the corrosion resistance of the body, the wax injection process is widely used inside the body cavities. Although the traditional liquid wax injection technology can form a wax film, it is easy to produce an overly thick wax layer at the depressions of complex cavities and on the body assembly surfaces, resulting in high wax consumption and frequent assembly quality problems.

[0003] With the development of intelligent manufacturing technology, the atomized wax spraying technology has gradually been introduced. By atomizing the liquid wax and evenly spraying it into the body cavities, the wax consumption can be significantly reduced, and the cleanliness of the body assembly surfaces can be improved. However, the effect of the atomized wax spraying process is affected by multiple factors such as nozzle design, wax temperature, and pressure. How to precisely control the thickness of the wax film has become the key to improving the quality of atomized wax spraying.

[0004] For the technical problem of how to precisely control the thickness of the wax film, no effective solution has been proposed yet. Summary of the Invention

[0005] Embodiments of the present invention provide a control method and a control device for improving the cavity wax injection process of automobile painting to at least solve the technical problem of how to precisely control the thickness of the wax film.

[0006] According to one aspect of the embodiments of the present invention, a control method for improving the cavity wax injection process of automobile painting is provided, including: obtaining the wax film thickness of a target body; comparing the wax film thickness with a threshold range to obtain a comparison result; generating a control strategy set based on the comparison result, where the control strategy set includes at least one of the following: a strategy for controlling the passing speed of the target body, a strategy for controlling the spraying parameters of atomized wax spraying.

[0007] Further, obtaining the wax film thickness of the target body includes: obtaining a reinforcement learning model; collecting the infrared reflection signals of the target body; extracting features from the infrared reflection signals to obtain the key feature vectors corresponding to the infrared reflection signals, where the key feature vectors at least include: reflection intensity and reflection wavelength; obtaining the wax film thickness of the target body based on the key feature vectors and the reinforcement learning model.

[0008] Further, generating a control strategy set based on the comparison result includes: in the case where the wax film thickness is within the first range threshold, generating a first target strategy in the control strategy set, where the first target strategy is used to control the target body to pass at the current speed and maintain the current spraying parameters of atomized wax spraying, where the first threshold range is within the threshold range.

[0009] Further, a control strategy set is generated based on the comparison result, including: when the thickness of the wax film is less than the minimum value of the threshold range, a second target strategy in the control strategy set is generated, and the second target strategy is used to lower the speed of the target vehicle body from the first speed to the second speed.

[0010] Further, a control strategy set is generated based on the comparison result, including: when the thickness of the wax film is less than the minimum value of the threshold range, a third target strategy in the control strategy set is generated, and the third target strategy includes at least one of the following: raising the temperature of the atomizing nozzle from the first temperature to the second temperature, raising the pressure of the atomizing nozzle from the first pressure to the second pressure, and reducing the distance between the atomizing nozzle and the target vehicle body from the first distance to the second distance.

[0011] Further, a control strategy set is generated based on the comparison result, including: when the thickness of the wax film is within the second threshold range, a fourth target strategy in the control strategy set is generated, and the fourth target strategy is used to raise the speed of the target vehicle body from the third speed to the fourth speed, where the second threshold range is within the threshold range and the second threshold range is greater than the first threshold range.

[0012] Further, a control strategy set is generated based on the comparison result, including: when the thickness of the wax film is within the second threshold range, a fifth target strategy in the control strategy set is generated, and the fifth target strategy includes at least one of the following: lowering the temperature of the atomizing nozzle from the third temperature to the fourth temperature, lowering the pressure of the atomizing nozzle from the third pressure to the fourth pressure, and increasing the distance between the atomizing nozzle and the target vehicle body from the third distance to the fourth distance, where the second threshold range is within the threshold range and the second threshold range is greater than the first threshold range.

[0013] According to another aspect of the embodiments of the present invention, a control device for improving the cavity wax injection process of automobile painting is further provided, including: an acquisition module for acquiring the thickness of the wax film of the target vehicle body; a comparison module for comparing the thickness of the wax film with the threshold range to obtain a comparison result; a control module for generating a control strategy set based on the comparison result, where the control strategy set includes at least one of the following: a strategy for controlling the passing speed of the target vehicle body, a strategy for controlling the spraying parameters of atomized wax spraying.

[0014] According to another aspect of the embodiments of the present invention, a computer storage medium is further provided, where the computer storage medium includes a stored program, and when the program runs, it controls the device where the computer storage medium is located to execute the above control method.

[0015] According to another aspect of the embodiments of the present invention, a computer program product is further provided, including a computer program, and when the computer program is executed by a processor, it implements the above control method.

[0016] In the embodiments of the present invention, by obtaining the wax film thickness of each part of the vehicle body and comparing it with a preset threshold range, the actual formation situation of the wax film can be monitored in real time. When it is detected that the wax film thickness of a certain part exceeds the threshold range, the spraying parameter strategy and the vehicle body passing speed strategy generated by the control strategy set are used to immediately adjust the wax spraying amount. The above control method can accurately control the forming thickness of the wax film by intelligently adjusting the vehicle body passing speed and the spraying parameters of atomized wax spraying, effectively reducing the wax layer that needs to be cleaned additionally, reducing the labor cost while shortening the process cycle and improving the overall operation efficiency of the production line. Brief Description of the Drawings

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 is a hardware structure block diagram of a computer terminal (or mobile device) for a control method for realizing the improvement of the cavity wax filling process in automobile painting according to an embodiment of the present invention;

[0019] Figure 2 is a flowchart of a control method for the improvement of the cavity wax filling process in automobile painting according to an embodiment of the present invention;

[0020] Figure 3 is a flowchart of another control method for the improvement of the cavity wax filling process in automobile painting according to an embodiment of the present invention;

[0021] Figure 4 is a structure block diagram of a control device for the improvement of the cavity wax filling process in automobile painting according to an embodiment of the present invention. Detailed Embodiments

[0022] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0024] According to an embodiment of the present invention, an embodiment of a control method for improving the automotive painting cavity wax injection process is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0025] Figure 1 is a hardware structure block diagram of a computer terminal (or mobile device) for implementing a control method for improving the automotive painting cavity wax injection process according to an embodiment of the present invention. As Figure 1 shown, the computer terminal (or mobile device) may include one or more processors 102 (the processor may include, but is not limited to, a processing device such as a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processing (DSP) chip, a microprocessor (MCU), a programmable logic device (FPGA), a neural network processor (NPU), a tensor processor (TPU), an artificial intelligence (AI) type processor, etc.) and a memory 104 for storing data. In addition, it may further include a transmission device 106 for communication functions, an input / output device 108, and a display 110. Those of ordinary skill in the art can understand that Figure 1 the structure shown is only schematic and does not limit the structure of the above-mentioned computer terminal (or mobile device). For example, the computer terminal may further include more or fewer components than those described in the above structure, or have a different configuration from that described in the above structure.

[0026] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the control method for improving the automotive painting cavity wax injection process in the embodiments of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, implements the above-mentioned control method for improving the automotive painting cavity wax injection process. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memories. In some instances, the memory 104 may further include a memory remotely disposed relative to the processor 102, and these remote memories can be connected to the mobile terminal through a network. Examples of the above-mentioned network include but are not limited to the Internet, enterprise intranet, local area network, mobile communication network, and combinations thereof.

[0027] The transmission device 106 is used to receive or send data via a network. Specific examples of the above-mentioned network may include a wireless network provided by a communication provider of the mobile terminal. In one instance, the transmission device 106 includes a network adapter (Network Interface Controller, abbreviated as NIC), which can be connected to other network devices through a base station and thus communicate with the Internet. In one instance, the transmission device 106 can be a radio frequency (Radio Frequency, abbreviated as RF) module, which is used to communicate with the Internet wirelessly.

[0028] The display 110 can be a touch-screen liquid crystal display (LCD). The liquid crystal display enables the user to interact with the user interface of the mobile terminal. In some embodiments, the above-mentioned mobile terminal has a graphical user interface (GUI), and the user can perform human-computer interaction with the GUI through finger contacts and / or gestures on the touch-sensitive surface. The human-computer interaction functions here optionally include the following interactions: creating web pages, drawing, word processing, creating electronic documents, games, video conferencing, instant messaging, sending and receiving emails, call interfaces, playing digital videos, playing digital music, and / or web browsing, etc. The executable instructions for performing the above-mentioned human-computer interaction functions are configured / stored in one or more computer program products or readable storage media executable by a processor.

[0029] In an embodiment according to the present application, an atomizing wax spraying device is provided, and the atomizing wax spraying device includes: a preheating system, a wax liquid melting system, and a high-pressure atomizing nozzle system.

[0030] The preheating system is responsible for heating the vehicle body to a certain temperature to improve the fluidity of the wax in the vehicle body cavity and reduce the uneven accumulation of the wax layer. The preheating furnace is usually equipped with a temperature control system and a blower to ensure uniform heating of all parts of the vehicle body and create favorable conditions for subsequent atomizing wax spraying.

[0031] The wax melting system includes a wax tank and a heating device, whose task is to heat the solid wax to a temperature suitable for atomization (e.g., 120 °C). The heating process needs to be precisely controlled to avoid excessive degradation or deterioration of the wax, which may affect the anti-corrosion performance of the wax film.

[0032] The nozzle system is the core of the atomizing wax spraying equipment. It atomizes the melted wax under high pressure to form fine wax mist particles and sprays them into the body cavity. The design of the nozzle needs to consider atomization efficiency, coverage range, and particle size to ensure that the wax mist can evenly cover the cavity surface and form a uniform wax film. The nozzle system should be equipped with a filtering device to prevent impurities in the wax tank from clogging the nozzle.

[0033] Among them, the nozzle system includes: an atomizing nozzle, a reducing joint, and a wax pipe. The wax pipe, the reducing joint, and the atomizing nozzle are connected in sequence. A filter screen is provided at the end of the wax pipe, and a pressure relief valve is provided on the wax pipe.

[0034] Figure 2 It is a flowchart of a control method for improving the automotive painting cavity wax filling process according to an embodiment of the present invention, as Figure 2 shown. The process includes the following steps:

[0035] Step S1: Obtain the wax film thickness of the target body.

[0036] Specifically, after the body is treated by atomizing wax spraying, an infrared detection device can be used to collect the infrared reflection signal reflected from the body surface, and the wax film thickness can be determined according to the infrared reflection signal; the penetration and reflection characteristics of ultrasonic waves can also be utilized to emit ultrasonic waves to the body surface and then receive the reflected signal, and the wax film thickness can be calculated according to the propagation time and intensity change of ultrasonic waves in the material; machine vision and image processing technologies can also be combined. An image of the body surface is taken by a high-resolution camera, and then the image features are analyzed by computer algorithms to indirectly infer the thickness of the wax film; X-ray fluorescence (XRF) detection can also be used. X-ray fluorescence technology emits X-rays and analyzes the characteristic X-ray fluorescence generated on the body surface due to X-ray excitation, thereby indirectly measuring the thickness and composition of the wax film. Microwave detection can also be used. Specifically, the attenuation and phase change of microwave signals in different media are utilized to measure the wax film thickness. The microwave signal penetrates the body surface, and part of it is absorbed and reflected by the wax film. By analyzing the change of the reflected signal, the thickness of the wax film can be inferred.

[0037] Step S2: Compare the wax film thickness with the threshold range to obtain a comparison result.

[0038] It should be noted that in the vehicle body production process, setting a reasonable wax film threshold range is crucial. The threshold range is generally determined based on comprehensive considerations of factors such as vehicle body anti-corrosion requirements, material costs, energy conservation, and emissions reduction. For example, for most automotive cavity parts, the ideal wax film thickness may be between 150μm and 200μm.

[0039] Compare the measured wax film thickness with the threshold range. If the thickness is below the lower limit of the threshold, there may be a risk of insufficient anti-corrosion; if it is above the upper limit of the threshold, it may cause material waste and cost increase. Generally, the comparison results will be classified, usually divided into several states such as "qualified", "too thin", "too thick", etc. These states will serve as the basis for formulating subsequent control strategies.

[0040] Step S3: Generate a control strategy set based on the comparison results. Among them, the control strategy set includes at least one of the following: a strategy for controlling the passing speed of the target vehicle body, and a strategy for controlling the spraying parameters of atomized wax spraying.

[0041] Specifically, according to the comparison results of the wax film thickness being qualified, too thin, or too thick, adjust the passing speed of the target vehicle body and / or adjust the spraying parameters of atomized wax spraying to control the wax film thickness.

[0042] It should be noted that the atomized wax spraying equipment is fixed, and during the atomized wax spraying process, the target vehicle body is moving.

[0043] In the embodiment of the present application, by obtaining the wax film thickness of each part of the vehicle body and comparing it with the pre-set threshold range, the actual formation situation of the wax film can be monitored in real time. When it is detected that the wax film thickness of a certain part exceeds the threshold range, the spraying parameter strategy and the vehicle body passing speed strategy generated in the control strategy set are used to immediately adjust the wax spraying amount. The above control method can accurately control the forming thickness of the wax film by intelligently adjusting the vehicle body passing speed and the spraying parameters of atomized wax spraying, effectively reducing the wax layer that needs to be cleaned additionally, reducing the labor cost while shortening the process cycle and improving the overall operation efficiency of the production line.

[0044] In an exemplary embodiment of the present application, in step S1, obtaining the wax film thickness of the target vehicle body includes the following steps:

[0045] Step S11: Obtain a reinforcement learning model.

[0046] The reinforcement learning model is trained with a large amount of historical data and can identify the correlation pattern between the feature vector and the wax film thickness. Specifically, obtaining the reinforcement learning model mainly includes: model construction, model training, and model optimization and testing. The model construction is carried out using the Deep Q-Network (DQN) algorithm. Before model training, the collected historical data needs to be preprocessed, including data cleaning (removing outliers and missing values), feature engineering (constructing features that help the model learn), and data partitioning (establishing a training set, a validation set, and a test set), etc. Using the preprocessed large amount of historical data, through interaction with the environment (i.e., the infrared reflection signal of the vehicle body and the corresponding wax film thickness data), the reinforcement learning model continuously learns and optimizes its strategy to more accurately predict the wax film thickness. After training, the model needs to go through multiple optimizations and tests to ensure its accuracy and stability in the real production environment. During the testing process, the performance of the model on unknown data will be examined, and hyperparameters will be adjusted until the model reaches the expected accuracy level.

[0047] Step S12: Collect the infrared reflection signal of the target vehicle body.

[0048] Specifically, the infrared reflection signal reflected from the vehicle body surface is collected through an infrared sensor.

[0049] Step S13: Extract features from the infrared reflection signal to obtain the key feature vector corresponding to the infrared reflection signal. The key feature vector includes at least: reflection intensity and reflection wavelength.

[0050] Specifically, before feature extraction, the infrared reflection signal needs to be preprocessed (removing noise). Preprocessing methods such as signal smoothing and detrending are required to reduce the random fluctuations in the signal and retain the basic features of the signal. Through signal processing algorithms (such as wavelet transform and Fourier transform), the features most relevant to the wax film thickness are extracted from the preprocessed signal, such as the maximum reflection intensity, peak frequency, etc. The extracted features are converted into a numerical vector form for easy input into the reinforcement learning model for further analysis and prediction.

[0051] Step S14: Based on the key feature vector and the reinforcement learning model, obtain the wax film thickness of the target vehicle body.

[0052] Specifically, the key feature vector is input into the reinforcement learning model, and the model will output the predicted wax film thickness according to the learned correlation pattern.

[0053] In the above steps S11 to S14, the reinforcement learning model can accurately predict the wax film thickness based on the vehicle body surface features, greatly improving the accuracy of detection and control, and avoiding the subjective errors and inconsistencies of traditional detection methods.

[0054] In an exemplary embodiment of the present application, as Figure 3 shown, in step S3, a control strategy set is generated based on the comparison result, including the following steps:

[0055] Step S310: When the wax film thickness is within the first range threshold, a first target strategy in the control strategy set is generated. The first target strategy is used to control the target vehicle body to pass at the current speed and maintain the spraying parameters of the current atomized wax spraying. Among them, the first threshold range is within the threshold range.

[0056] Specifically, when the detection system feedbacks that the wax film thickness is within the first range threshold, it indicates that the wax film thickness in the wax spraying area is qualified. The control unit will not adjust the moving speed of the vehicle body in the wax spraying area and will not adjust the current spraying parameters, that is, maintain the existing process parameters to ensure high-quality output of the vehicle body wax film thickness within the threshold range.

[0057] It should be noted that when the current wax film thickness is within the threshold range, the control unit still needs to monitor the change of the wax film thickness on the vehicle body surface in real time and maintain close communication with the infrared detection system. If it is found that the thickness deviates from the threshold during subsequent operations, the first target strategy will immediately fail, and the system will automatically switch to other target strategies or higher-level control strategies to timely adjust the vehicle body passing speed or spraying parameters.

[0058] In an exemplary embodiment of the present application, as Figure 3 shown, in step S3, a control strategy set is generated based on the comparison result, as follows:

[0059] Step S320: When the wax film thickness is less than the minimum value of the threshold range, a second target strategy in the control strategy set is generated. The second target strategy is used to lower the speed of the target vehicle body from the first speed to the second speed.

[0060] Specifically, when the infrared detection device detects that the wax film thickness of the vehicle body is lower than the minimum value of the threshold range, the alarm mechanism is immediately triggered to notify the control unit to prepare to take action. After receiving the alarm, the control unit sends an instruction to the vehicle body transmission system to adjust the motor speed or the gear ratio of the transmission device to decelerate the vehicle body. The degree of deceleration depends on the gap between the current wax film thickness of the vehicle body and the threshold minimum value, ensuring that the wax film thickness can be effectively supplemented without being too thick. After the vehicle body decelerates, the residence time in the wax spraying area increases accordingly, which means that the vehicle body surface has more time to contact the atomized wax liquid, thereby increasing the deposition amount of the wax film.

[0061] It should be noted that during the process of speed adjustment and re - wax spraying of the entire vehicle body, the infrared detection device continuously monitors the wax film thickness of each part of the vehicle body to ensure that it gradually approaches the minimum value of the threshold. The control unit then decides when to resume the normal passing speed of the vehicle body based on the feedback data, or whether further adjustment is required.

[0062] In the above - mentioned embodiment, by precisely regulating the vehicle body speed, it is possible to effectively avoid the problem of unqualified products caused by insufficient wax film thickness, significantly improve the qualified rate of the finished products in the painting process, and reduce the rework and scrapping costs.

[0063] Furthermore, in order to avoid excessive adjustment resulting in too thick a wax film on other parts of the vehicle body, the control unit dynamically adjusts the spraying parameters of the atomizing nozzle according to the deceleration amplitude of the vehicle body and the real - time detection result of the wax film thickness. These parameters include but are not limited to atomizing pressure, wax liquid supply rate, nozzle angle, nozzle temperature, and the distance between the nozzle and the vehicle body, etc., to ensure that the overall thickness of the wax film is within the threshold range.

[0064] In an exemplary embodiment of the present application, as Figure 3 shown, in step S3, a control strategy set is generated based on the comparison result, as follows:

[0065] Step S330: In the case where the wax film thickness is less than the minimum value of the threshold range, generate the third target strategy in the control strategy set. The third target strategy includes at least one of the following: raising the temperature of the atomizing nozzle from the first temperature to the second temperature, raising the pressure of the atomizing nozzle from the first pressure to the second pressure, and reducing the distance between the atomizing nozzle and the target vehicle body from the first distance to the second distance.

[0066] Specifically, raising the temperature of the atomizing nozzle from the first temperature to the second temperature can improve the fluidity and atomization effect of the wax liquid. The increase in temperature can reduce the viscosity of the wax liquid, making it easier to atomize into fine particles. These particles can be more evenly distributed on the surface of the vehicle body cavity, forming a thicker wax film. Among them, the temperature control system needs to have the ability of rapid response and precise control to ensure that the nozzle temperature rises to the second temperature in a short time and remains stable, so as to avoid the influence of temperature fluctuations on the wax film thickness.

[0067] Raising the pressure of the atomizing nozzle from the first pressure to the second pressure can enhance the atomization effect and the penetration power of the wax mist. Increasing the nozzle pressure can produce finer droplets, which are more widely distributed and deposited more evenly in the vehicle body cavity, contributing to an increase in the wax film thickness. In addition, higher pressure can overcome the complex structure of the vehicle body cavity to ensure that the wax mist can reach all parts that need anti - corrosion, forming a continuous and defect - free wax film.

[0068] Reduce the distance between the atomizing nozzle and the target vehicle body from a first distance to a second distance to improve the density and coverage efficiency of the spray. Shortening the distance can reduce the dispersion of droplets in the air, increasing their deposition density on the vehicle body surface, which helps to increase the thickness of the wax film. At the same time, this strategy can also reduce the waste of wax liquid and improve the resource utilization rate.

[0069] In the above embodiment, by precisely controlling the vehicle body speed, it is possible to effectively avoid product unqualified problems caused by insufficient wax film thickness, significantly improve the finished product qualification rate of the painting process, and reduce the rework and scrapping costs.

[0070] Through the adjustment of the above strategy, the thickness of the wax film in the vehicle body cavity can be significantly increased to reach or approach a preset threshold. This is crucial for improving the anti-corrosion performance of the vehicle body and can effectively reduce the failure rate and maintenance costs caused by corrosion.

[0071] As a preferred embodiment, when the wax film thickness is less than the minimum value of the threshold range, the third target strategy and the second target strategy can be jointly controlled.

[0072] In an exemplary embodiment of the present application, as Figure 3 shown, in step S3, a control strategy set is generated based on the comparison result, as follows:

[0073] Step S340: When the wax film thickness is within a second threshold range, generate a fourth target strategy in the control strategy set. The fourth target strategy is used to increase the speed of the target vehicle body from a third speed to a fourth speed, where the second threshold range is within the threshold range and the second threshold range is greater than the first threshold range.

[0074] Specifically, when the infrared detection device detects that the wax film thickness of the vehicle body is close to the maximum value of the threshold range, for example, the wax film threshold range is between 150μm and 200μm, when the wax film thickness reaches 180μm, the alarm mechanism is immediately triggered to notify the control unit to prepare to take action. After receiving the alarm, the control unit sends an instruction to the vehicle body transmission system to adjust the motor speed or the gear ratio of the transmission device to accelerate the vehicle body so that the vehicle body can pass quickly to avoid the wax film from continuing to deposit and causing the wax film to be too thick.

[0075] In the above embodiment, by precisely controlling the vehicle body speed, it is possible to effectively avoid product unqualified problems caused by too thick wax film thickness, significantly improve the finished product qualification rate of the painting process, and reduce the rework and scrapping costs.

[0076] Further, to avoid the wax film on other parts of the vehicle body becoming too thick due to excessive adjustment, the control unit dynamically adjusts the spraying parameters of the atomizing nozzle according to the deceleration amplitude of the vehicle body and the real-time detection result of the wax film thickness. These parameters include, but are not limited to, atomizing pressure, wax liquid supply rate, nozzle angle, nozzle temperature, and the distance between the nozzle and the vehicle body, etc., to ensure that the overall thickness of the wax film is within the threshold range.

[0077] In an exemplary embodiment of the present application, as Figure 3 shown, in step S3, a control strategy set is generated based on the comparison result, as follows:

[0078] Step S350: When the wax film thickness is within the second threshold range, a fifth target strategy in the control strategy set is generated. The fifth target strategy includes at least one of the following: lowering the temperature of the atomizing nozzle from the third temperature to the fourth temperature, lowering the pressure of the atomizing nozzle from the third pressure to the fourth pressure, and increasing the distance between the atomizing nozzle and the target vehicle body from the third distance to the fourth distance. Here, the second threshold range is within the threshold range, and the second threshold range is greater than the first threshold range.

[0079] Lowering the temperature of the atomizing nozzle from the third temperature to the fourth temperature aims to increase the viscosity of the wax liquid and reduce its atomization degree. The decrease in temperature will weaken the fluidity of the wax liquid, resulting in larger particles after atomization, which are not easily penetrated into the fine parts of the vehicle body cavity, thus controlling the increase in the wax film thickness and avoiding exceeding the maximum value.

[0080] Lowering the pressure of the atomizing nozzle from the third pressure to the fourth pressure weakens the atomization effect and reduces the density and coverage range of the wax mist. Reducing the pressure means that the particles of the atomized wax liquid are larger and sparser, and the thickness of the wax film deposited on the vehicle body surface is lighter. This strategy can effectively control the wax film thickness, reduce the consumption of wax liquid at the same time, and improve the resource utilization rate.

[0081] Increasing the distance between the atomizing nozzle and the target vehicle body from the third distance to the fourth distance aims to reduce the deposition density of the spray on the vehicle body surface. Increasing the distance allows the wax mist to have more diffusion space in the air, reducing the concentration of wax liquid per unit area, which helps to control the wax film thickness not to exceed the maximum value. In addition, this strategy can also reduce the accumulation of wax liquid on the vehicle body surface and avoid problems in subsequent processing.

[0082] Through the above steps, by precisely controlling the temperature, pressure, and distance of the atomizing nozzle, the problem of excessive wax film thickness in the vehicle body cavity can be effectively avoided, greatly reducing unnecessary wax liquid consumption, lowering production costs, and at the same time reflecting the concept of resource conservation and environmental protection.

[0083] As a preferred embodiment, when the wax film thickness is within the second threshold range, the fourth target strategy and the fifth target strategy can be jointly controlled.

[0084] According to another specific embodiment of the present application, a control device for improving the cavity waxing process of automobile painting is further provided.

[0085] As Figure 4 shown, the control device includes: an acquisition module, a comparison module, and a control module. The acquisition module is used to acquire the wax film thickness of the target vehicle body; the comparison module is used to compare the wax film thickness with a threshold range to obtain a comparison result; the control module is used to generate a control strategy set based on the comparison result, where the control strategy set includes at least one of the following: a strategy for controlling the passing speed of the target vehicle body, a strategy for controlling the spraying parameters of atomized wax spraying.

[0086] In the embodiment of the present application, the control device can monitor the actual formation of the wax film in real time by acquiring the wax film thickness of each part of the vehicle body and comparing it with a preset threshold range. When it is detected that the wax film thickness of a certain part exceeds the threshold range, the spraying parameter strategy and the vehicle body passing speed strategy generated in the control strategy set are used to immediately adjust the wax spraying amount. The above control method can accurately control the forming thickness of the wax film by intelligently adjusting the passing speed of the vehicle body and the spraying parameters of atomized wax spraying, effectively reducing the wax layer that needs to be cleaned additionally, reducing the labor cost while shortening the process cycle and improving the overall operation efficiency of the production line.

[0087] According to another specific embodiment of the present application, a computer storage medium is further provided. The computer storage medium includes a stored program, where when the program runs, it controls the device where the computer storage medium is located to execute the above method.

[0088] In this embodiment, the above storage medium can be set to store a computer program for performing the following steps:

[0089] Step S1: Acquire the wax film thickness of the target vehicle body.

[0090] Step S2: Compare the wax film thickness with a threshold range to obtain a comparison result.

[0091] Step S3: Generate a control strategy set based on the comparison result, where the control strategy set includes at least one of the following: a strategy for controlling the passing speed of the target vehicle body, a strategy for controlling the spraying parameters of atomized wax spraying.

[0092] In an embodiment of the present application, by obtaining the wax film thickness of each part of the vehicle body and comparing it with a preset threshold range, the actual formation of the wax film can be monitored in real time. When it is detected that the wax film thickness of a certain part exceeds the threshold range, the spraying parameter strategy and the vehicle body passing speed strategy generated in the control strategy set are used to immediately adjust the wax spraying amount. The above control method can accurately control the forming thickness of the wax film by intelligently adjusting the vehicle body passing speed and the spraying parameters of atomized wax spraying, effectively reducing the wax layer that needs to be additionally cleaned, reducing the labor cost while shortening the process cycle and improving the overall operation efficiency of the production line.

[0093] According to another specific embodiment of the present application, there is also provided a computer program product, including a computer program, which implements the above control method when executed by a processor.

[0094] In this embodiment, the above processor can be set to execute the following steps through a computer program:

[0095] Step S1: Obtain the wax film thickness of the target vehicle body.

[0096] Step S2: Compare the wax film thickness with the threshold range to obtain a comparison result.

[0097] Step S3: Generate a control strategy set based on the comparison result, where the control strategy set includes at least one of the following: a strategy for controlling the passing speed of the target vehicle body, a strategy for controlling the spraying parameters of atomized wax spraying.

[0098] In an embodiment of the present application, by obtaining the wax film thickness of each part of the vehicle body and comparing it with a preset threshold range, the actual formation of the wax film can be monitored in real time. When it is detected that the wax film thickness of a certain part exceeds the threshold range, the spraying parameter strategy and the vehicle body passing speed strategy generated in the control strategy set are used to immediately adjust the wax spraying amount. The above control method can accurately control the forming thickness of the wax film by intelligently adjusting the vehicle body passing speed and the spraying parameters of atomized wax spraying, effectively reducing the wax layer that needs to be additionally cleaned, reducing the labor cost while shortening the process cycle and improving the overall operation efficiency of the production line.

[0099] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0100] In the above embodiments of the present invention, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0101] In several embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of units or modules can be in an electrical or other form.

[0102] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0103] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0104] If the above-mentioned integrated units are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present invention. The foregoing storage medium includes: various media such as USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks or optical discs that can store program codes.

[0105] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A control method for improving the cavity wax injection process of automobile painting, characterized in that Including: Obtain the wax film thickness of the target vehicle body; Compare the wax film thickness with a threshold range to obtain a comparison result; Generate a control policy set based on the comparison result, where the control policy set includes at least one of the following: a policy for controlling the passing speed of the target vehicle body, a policy for controlling the spraying parameters of atomized wax spraying.

2. The control method according to claim 1, wherein Obtaining the wax film thickness of the target vehicle body includes: Obtain a reinforcement learning model; Collect the infrared reflection signal of the target vehicle body; Extract features from the infrared reflection signal to obtain a key feature vector corresponding to the infrared reflection signal, where the key feature vector includes at least: reflection intensity and reflection wavelength; Based on the key feature vector and the reinforcement learning model, obtain the wax film thickness of the target vehicle body.

3. The control method according to claim 1, characterized in that, Generating a control policy set based on the comparison result includes: In the case where the wax film thickness is within a first threshold range, generate a first target policy in the control policy set, where the first target policy is used to control the target vehicle body to pass at the current speed and maintain the current spraying parameters of atomized wax spraying, where the first threshold range is within the threshold range.

4. The control method according to claim 1, wherein Generating a control policy set based on the comparison result includes: In the case where the wax film thickness is less than the minimum value of the threshold range, generate a second target policy in the control policy set, where the second target policy is used to lower the speed of the target vehicle body from a first speed to a second speed.

5. The control method according to claim 1 or 4, characterized in that Generating a control policy set based on the comparison result includes: In the case where the wax film thickness is less than the minimum value of the threshold range, generate a third target policy in the control policy set, where the third target policy includes at least one of the following: raising the temperature of the atomizing nozzle from a first temperature to a second temperature, raising the pressure of the atomizing nozzle from a first pressure to a second pressure, reducing the distance between the atomizing nozzle and the target vehicle body from a first distance to a second distance.

6. The control method according to claim 3, wherein Generating a control policy set based on the comparison result includes: In the case where the wax film thickness is within a second threshold range, generate a fourth target policy in the control policy set, where the fourth target policy is used to raise the speed of the target vehicle body from a third speed to a fourth speed, where the second threshold range is within the threshold range, and the second threshold range is greater than the first threshold range.

7. The control method according to claim 3 or 6, characterized in that, Generating a control policy set based on the comparison result includes: In the case where the wax film thickness is within a second threshold range, generate a fifth target policy in the control policy set, where the fifth target policy includes at least one of the following: lowering the temperature of the atomizing nozzle from a third temperature to a fourth temperature, lowering the pressure of the atomizing nozzle from a third pressure to a fourth pressure, increasing the distance between the atomizing nozzle and the target vehicle body from a third distance to a fourth distance, where the second threshold range is within the threshold range, and the second threshold range is greater than the first threshold range.

8. A control device for improving the cavity wax injection process of automobile painting, characterized in that, Including: An acquisition module, where the acquisition module is used to obtain the wax film thickness of the target vehicle body; A comparison module, where the comparison module is used to compare the wax film thickness with a threshold range to obtain a comparison result; A control module, which is configured to generate a control strategy set based on the comparison result, wherein the control strategy set includes at least one of the following: a strategy for controlling the passing speed of the target vehicle body, and a strategy for controlling the spraying parameters of atomized wax spraying.

9. A computer storage medium, characterized in that, The computer storage medium includes a stored program, wherein when the program runs, it controls the device where the computer storage medium is located to execute the control method according to any one of claims 1-7.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the control method according to any one of claims 1-7.

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