Surface treatment system and method based on new energy aluminum alloy parts

Abstract

The invention discloses a surface treatment system and method based on new energy aluminum alloy parts, and relates to the technical field of aluminum alloy surface treatment.The system comprises a temperature regulation and control module, a current density adjustment module, an ion concentration real-time monitoring module, an oxidation reaction tank module and an electrolyte dynamic balance management module; through the synergistic effect of gradient porosity anodic oxide film control and electrolyte dynamic balance, the comprehensive performance of the new energy aluminum alloy part is remarkably improved, the inner layer compact structure of the gradient oxide film can effectively isolate water, oxygen and other corrosive media, and the part still has excellent corrosion resistance in the complex environment; the outer porous structure provides abundant anchoring points for a subsequent coating, the binding force of the coating and the aluminum alloy matrix is greatly enhanced, the phenomena of peeling, peeling and the like of the coating are avoided, and long-term stability of the appearance and the function of the part is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum alloy surface treatment, and in particular to a surface treatment system and method for new energy aluminum alloy parts. Background Art

[0002] Aluminum alloy has become a key material for the manufacturing of components in the new energy field due to its advantages such as low density, high specific strength and strong recyclability. From the body frames and battery shells of new energy vehicles to the outer shells and internal structural parts of energy storage equipment, aluminum alloy components are used everywhere. Their performance directly affects the safety, reliability and service life of new energy products. However, aluminum alloy itself has active chemical properties and easily reacts with oxygen in the natural environment to form a loose and porous oxide film. This film not only cannot effectively block corrosive media, but also affects the adhesion effect of subsequent coatings.

[0003] At present, traditional aluminum alloy surface treatment technology has exposed many problems when facing the special needs of the new energy field. In terms of anodizing treatment, the existing process is difficult to achieve precise control of the porosity of the oxide film, and cannot form a gradient structure with a dense inner layer and a porous outer layer, resulting in difficulty in balancing the corrosion resistance of parts and the adhesion of the coating. At the same time, in electrolyte management, most technologies lack effective real-time monitoring and dynamic balance adjustment mechanisms. The electrolyte composition fluctuates greatly during the reaction process, which not only reduces the stability of the treatment effect, but also greatly shortens the service life of the bath. Frequent replacement of the bath increases production costs and environmental pollution risks, making it difficult to meet the large-scale, high-efficiency and green production needs of the new energy industry.

[0004] In summary, the development of a surface treatment system and method that can accurately control the oxide film structure on the surface of aluminum alloys and achieve dynamic balance of electrolyte composition is of great significance for improving the performance of new energy aluminum alloy components and promoting the sustainable development of the new energy industry. Summary of the Invention

[0005] The purpose of the present invention is to make up for the shortcomings of the existing technology and provide a surface treatment system and method based on new energy aluminum alloy parts. It can significantly improve the comprehensive performance of new energy aluminum alloy parts through the synergistic effect of gradient porosity anodized film control technology and electrolyte dynamic balance. On the one hand, the dense inner layer structure of the gradient oxide film can effectively isolate corrosive media such as moisture and oxygen, so that the parts still have excellent corrosion resistance in complex environments. The outer porous structure provides abundant anchor points for subsequent coatings, greatly enhances the bonding strength between the coating and the aluminum alloy substrate, avoids peeling and other phenomena of the coating, and ensures the long-term stability of the appearance and function of the parts. On the other hand, the stable electrolyte composition ensures the consistency of the anodizing reaction, so that each batch of parts can obtain uniform and reliable surface treatment effects, effectively improves the stability of product quality, reduces the defective rate, and provides a solid guarantee for the reliable operation of new energy equipment.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: On the one hand, a surface treatment system for new energy aluminum alloy parts is provided, which comprises: a temperature control module, a current density adjustment module, a real-time ion concentration monitoring module, an oxidation reaction tank module, and an electrolyte dynamic balance management module;

[0007] The temperature control module is used to collect and adjust the temperature data in the electrolytic cell in real time, and transmit the data to the central control unit of the system, and provide a stable temperature environment for the electrolyte according to the control instructions of the central control unit;

[0008] The current density adjustment module is used to monitor the output current intensity in real time, receive control instructions from the central control unit, and dynamically adjust the current density to control the porosity gradient of the oxide film on the surface of the aluminum alloy;

[0009] The ion concentration real-time monitoring module integrates multiple ion selective electrode arrays on the electrolytic cell body and electrolyte flow path to perform real-time monitoring of Al3+ and F- ions respectively. The ion selective electrodes convert the detected ion concentration signals into electrical signals, which are processed by signal amplification and filtering circuits and then transmitted to the electrolyte dynamic balance management module.

[0010] The gradient porosity dynamic control module dynamically adjusts the electrolyte temperature and current density to generate a gradient oxide film with a dense inner layer and a porous outer layer;

[0011] The electrolyte dynamic balance management module receives the ion concentration data transmitted by the ion concentration real-time monitoring module, performs analysis and calculation, and determines the concentration deviation of each ion component in the electrolyte.

[0012] Furthermore, the temperature control module includes a temperature sensor unit, a heating control unit, a cooling control unit and a temperature data processing unit;

[0013] The temperature sensor unit collects electrolyte temperature data in real time by measuring temperature, and transmits the data to the temperature data processing unit in the form of digital signals;

[0014] After receiving the temperature data transmitted by the temperature sensor unit, the temperature data processing unit performs filtering and noise reduction processing on the data to remove interference signals, and transmits the processed data to the data processing unit of the electrolyte dynamic balance management module;

[0015] The temperature data processing unit generates corresponding heating and cooling control signals based on the received target temperature value and control instructions. When the actual temperature is lower than the target temperature, the temperature data processing unit sends a heating signal to the heating control unit. The heating control unit controls the heating unit to heat the electrolyte with corresponding power according to the received signal. When the actual temperature is higher than the target temperature, the temperature data processing unit sends a cooling signal to the cooling control unit. The cooling control unit controls the cooling unit to start cyclic cooling according to the signal to lower the electrolyte temperature.

[0016] Furthermore, the current density adjustment module includes a current output unit, a current sensor unit, a control circuit unit and a current data processing unit;

[0017] The current sensor unit is connected in series to the electrode circuit of the electrolytic cell body, monitors the current in the circuit in real time, and transmits the collected current data in the form of an electrical signal to the current data processing unit;

[0018] The current data processing unit amplifies and pre-processes the received current data by analog-to-digital conversion, transmits the data to the data processing unit of the electrolyte dynamic balance management module, and receives control instructions from the central control unit;

[0019] When the monitored actual current density is less than the target current density, the current data processing unit sends a signal to increase the current to the control circuit unit, and the control circuit unit increases the output current by adjusting the output voltage and frequency parameters of the current output unit. When the monitored actual current density is greater than the target current density, the current data processing unit sends a signal to decrease the current to the control circuit unit, and the control circuit unit controls the current output unit to reduce the output current.

[0020] Furthermore, the ion concentration real-time monitoring module includes an ion selective electrode array unit, a signal processing unit and a data transmission unit;

[0021] The ion selective electrode array unit is integrated into the electrolytic cell and the electrolyte flow path, specifically identifying Al3+ and F- ions, monitoring their concentration changes in real time, generating corresponding ion concentration signals, and converting the ion concentration signals into electrical signals;

[0022] The signal processing unit amplifies and filters the converted electrical signal to remove noise interference in the signal, and the processed signal is transmitted in real time to the data processing unit of the electrolyte dynamic balance management module through the data transmission unit;

[0023] The ion concentration real-time monitoring module dynamically adjusts the monitoring frequency and monitoring accuracy according to the control instructions, and at the same time feeds back the adjusted monitoring data to the electrolyte dynamic balance management module in real time to assist it in controlling the rehydration pump and the waste liquid discharge valve to achieve dynamic balance of the electrolyte components.

[0024] Furthermore, the gradient porosity dynamic control module includes a dynamic adjustment unit and a central control unit;

[0025] The dynamic adjustment unit establishes two-way communication with the temperature control module, the current density adjustment module and the ion concentration real-time monitoring module respectively;

[0026] The central control unit pre-stores a surface treatment process program, receives temperature data transmitted by the temperature data processing unit of the temperature control module, current density data transmitted by the current data processing unit of the current density adjustment module, and ion concentration data transmitted by the ion concentration real-time monitoring module; the central control unit sends control instructions through the dynamic adjustment unit according to the pre-stored program and the received real-time data;

[0027] The dynamic adjustment unit adjusts the working status of the heating unit and cooling unit of the temperature control module and the output parameters of the current output unit of the current density adjustment module according to the control instructions, dynamically adjusts the electrolyte temperature and current density, and generates a gradient oxide film with a dense inner layer and a porous outer layer on the surface of the aluminum alloy. At the same time, the gradient porosity dynamic adjustment module feeds back the adjustment status and the generated oxide film parameters to the electrolyte dynamic balance management module.

[0028] Furthermore, the electrolyte dynamic balance management module includes a data processing unit, a liquid replenishment control unit, a waste liquid discharge control unit and a system coordination unit;

[0029] The data processing unit receives the ion concentration data transmitted by the real-time ion concentration monitoring module, the temperature data transmitted by the temperature control module, and the current density data transmitted by the current density adjustment module, performs comprehensive analysis and calculation, and determines the concentration deviation of each ion component in the electrolyte; when it is detected that the ion concentration exceeds the set fluctuation range of ±2%, the rehydration control unit controls the rehydration pump to extract the corresponding electrolyte supplement from the reserve tank based on the calculation result of the data processing unit to replenish the missing ion components;

[0030] The waste liquid discharge control unit controls the waste liquid discharge valve to open according to the instruction of the data processing unit to discharge the excess ion components;

[0031] The electrolyte dynamic balance management module is communicatively connected to the central control unit, receives collaborative control instructions issued by the central control unit based on the requirements for gradient oxide film generation, and feeds back the electrolyte composition adjustment status to the central control unit in real time, thereby achieving efficient collaboration between the modules and ensuring the stable generation of a gradient oxide film during the dynamic balance of the electrolyte composition.

[0032] Furthermore, the data processing unit calculates the electrolyte ion concentration deviation based on the received ion concentration data, combined with the preset ion concentration fluctuation range and temperature and current density data. where ΔC i is the concentration deviation of the i-th ion, is the actual measured concentration of the i-th ion, provided by the ion concentration real-time monitoring module, is the target concentration of the i-th ion and is a set fixed value. According to the concentration deviation, the rehydration control unit and the waste liquid discharge control unit calculate the rehydration amount and the discharge amount. The rehydration amount The amount of liquid discharged in, is the volume of electrolyte supplement required to replenish the i-th ion, is the volume of electrolyte that the i-th ion needs to be discharged, V ztj is the total volume of electrolyte in the electrolytic cell, is the concentration of the i-th ion in the storage tank;

[0033] The data processing unit calculates the target temperature value according to the temperature range of 5-40℃ preset by the central control unit and the change of electrolyte composition, and feeds the target temperature value and control instructions back to the temperature data processing unit. The target temperature value T mb =T base +ΔT ion , where T mb is the target temperature of the electrolyte, Tbase is the basic temperature, ranging from 5-40℃, ΔT ion is the temperature adjustment caused by the change in ion concentration;

[0034] The data processing unit calculates the target current density value required at present according to the received current data, temperature data and electrolyte ion concentration data, and sends the target current density value and control instructions to the current data processing unit. Among them, I mb is the target current density, I jc is the basic current density, α is the correction factor used to adjust the degree of influence of ion concentration changes on current density, n is the number of ions, It is the sum of the concentration deviations of all monitored ions relative to the target concentration.

[0035] On the other hand, based on the surface treatment method of new energy aluminum alloy parts, the specific steps of the method are:

[0036] S100, placing new energy aluminum alloy components into an electrolytic cell, and injecting electrolyte into the electrolytic cell;

[0037] S200, adjusting the electrolyte temperature to a set temperature range through the temperature control module, and adjusting the current density to an initial set value through the current density adjustment module, and starting the oxidation reaction;

[0038] S300, during the oxidation reaction, the ion concentration monitoring module monitors the ion concentration in the electrolyte in real time and transmits the data to the electrolyte dynamic balance control module;

[0039] S400, the electrolyte dynamic balance control module, calculates the ion concentration data received through an intelligent algorithm, controls the rehydration pump to replenish the missing ion components, and controls the waste liquid discharge valve to discharge the excess components, maintaining the electrolyte composition stable within a fluctuation of ±2%;

[0040] S500: Continuously adjust the electrolyte temperature and current density to form a gradient oxide film with a dense inner layer and a porous outer layer on the surface of the aluminum alloy to complete the surface treatment.

[0041] Compared with the existing technology, the surface treatment system and method based on new energy aluminum alloy parts have the following beneficial effects:

[0042] 1. The present invention significantly improves the comprehensive performance of new energy aluminum alloy components through the synergistic effect of gradient porosity anodic oxide film control and electrolyte dynamic balance. The dense inner layer structure of the gradient oxide film can effectively isolate corrosive media such as moisture and oxygen, so that the components still have excellent corrosion resistance in complex environments; the outer layer porous structure provides abundant anchor points for subsequent coatings, greatly enhancing the bonding strength between the coating and the aluminum alloy substrate, avoiding peeling and other phenomena of the coating, and ensuring the long-term stability of the appearance and function of the components.

[0043] 2. The dynamic balance of electrolyte ion concentration in the present invention effectively extends the life of the bath, significantly reduces the consumption of chemical reagents and the amount of waste liquid generated, and the stable electrolyte composition ensures the consistency of the anodic oxidation reaction, so that each batch of parts can obtain a uniform and reliable surface treatment effect, effectively improving the stability of product quality, reducing the defective rate, and providing a solid guarantee for the reliable operation of new energy equipment.

[0044] Other advantages, objects and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be learned from the practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0046] Figure 1 This is the operation flow chart of the surface treatment system for new energy aluminum alloy parts;

[0047] Figure 2 This is a module composition diagram of the surface treatment system based on new energy aluminum alloy parts. DETAILED DESCRIPTION

[0048] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0049] Example 1

[0050] This embodiment describes in detail the practical application process of the surface treatment system based on new energy aluminum alloy parts. Figure 2As shown in the figure, the system includes a temperature control module, a current density adjustment module, a real-time ion concentration monitoring module, a gradient porosity dynamic control module and an electrolyte dynamic balance management module. Through the coordinated work of each module, the surface of the aluminum alloy parts can be treated to generate a gradient oxide film with a dense inner layer and a porous outer layer, and the electrolyte composition can be maintained stable.

[0051] In this embodiment, taking the treatment of aluminum alloy parts for battery shells of new energy vehicles as an example, the surface treatment system of the present invention is used for operation. The new energy aluminum alloy parts to be treated are carefully placed in the oxidation electrolysis cell body, and an appropriate amount of electrolyte is injected into the oxidation electrolysis cell body to provide a reaction environment for the anodic oxidation reaction. The temperature control module begins to function, which is composed of a temperature sensor unit, a heating control unit, a cooling control unit and a temperature data processing unit. The temperature sensor unit uses a high-precision temperature sensor for real-time acquisition of electrolyte temperature data. These data are transmitted to the temperature data processing unit in the form of digital signals. After receiving the temperature data, the temperature data processing unit first performs filtering and noise reduction processing. This is because in the actual acquisition process, the temperature data will be affected by various interference signals, such as electromagnetic interference from the surrounding environment and electronic noise of the equipment itself. By filtering and noise reduction processing, these interference signals can be removed, making the temperature data more accurate and reliable. The processed temperature data will be transmitted to the data processing unit of the electrolyte dynamic balance management module. At the same time, the temperature data processing unit will also receive the target temperature value and control instructions fed back from the electrolyte dynamic balance management module. For example, the actual temperature of the current electrolyte is T sj The electrolyte dynamic balance management module calculates the target temperature value T according to the preset 5-40°C temperature range and the changes in the electrolyte composition. mb , the calculation formula is T mb =T base +ΔT ion , where T base It is the basic temperature, ranging from 5-40℃, which is pre-set according to the material characteristics of aluminum alloy parts and the processing requirements. ion is the temperature adjustment caused by the change in ion concentration. When T sj <T mb When T is reached, the temperature data processing unit sends a heating signal to the heating control unit. After receiving the signal, the heating control unit controls the heating unit to heat the electrolyte with the corresponding power. The heating unit can adopt a resistance heating method to control the heating power by adjusting the current to gradually increase the electrolyte temperature. sj >T mbWhen the temperature reaches 0.05°C, the temperature data processing unit sends a cooling signal to the cooling control unit. The cooling control unit controls the cooling unit to start circulating cooling according to the signal. The cooling medium circulates in the pipeline, taking away the heat of the electrolyte, thereby reducing the electrolyte temperature. During the entire temperature control process, the temperature sensor unit continuously monitors the electrolyte temperature in real time to form a closed-loop control to ensure that the electrolyte temperature is stable to the target value.

[0052] The current density regulation module is composed of a current output unit, a current sensor unit, a control circuit unit and a current data processing unit. The current sensor unit is connected in series in the electrode circuit of the electrolytic cell body to monitor the current size in the circuit in real time. It transmits the collected current data in the form of an electrical signal to the current data processing unit. The current data processing unit performs pre-processing operations such as amplification and analog-to-digital conversion on the received current data. Since the electrical signal collected by the current sensor is relatively weak and contains some noise, the amplification operation can enhance the signal strength. The analog-to-digital conversion converts the analog signal into a digital signal to facilitate subsequent digital circuit processing and calculation. After pre-processing, part of the current data is transmitted to the data processing unit of the electrolyte dynamic balance management module, and the other part is used to compare with the target current density value transmitted by the central control unit. The data processing unit of the electrolyte dynamic balance management module calculates the currently required target current density value I based on the received current data, temperature data and electrolyte ion concentration data. mb , the calculation formula is Among them, I jc It is the basic current density, which is pre-set according to the material, processing technology and expected oxide film effect of aluminum alloy parts. α is the correction coefficient, which is used to adjust the influence of ion concentration change on current density. n is the number of ions, mainly Al 3+ 、F - Key monitoring ions such as It is the sum of the concentration deviations of all monitored ions relative to the target concentration. is the actual measured concentration of the i-th ion, provided by the ion concentration real-time monitoring module, is the target concentration of the i-th ion and is a set fixed value. When the actual current density I sj Less than the target current density I mb When the current data processing unit sends a signal to increase the current to the control circuit unit, the control circuit unit increases the output current by adjusting the output voltage, frequency and other parameters of the current output unit after receiving the signal. For example, the control circuit unit can adjust the output voltage and frequency by changing the working parameters of the power amplifier in the current output unit, thereby increasing the output current. When the actual current density I sj Greater than the target current density I mbWhen the current density reaches the target value, the current data processing unit sends a signal to the control circuit unit to reduce the current. The control circuit unit controls the current output unit to reduce the output current, ensuring that the actual current density is always close to the target current density, thereby accurately controlling the porosity gradient of the oxide film on the surface of the aluminum alloy.

[0053] The ion concentration real-time monitoring module includes an ion selective electrode array unit, a signal processing unit and a data transmission unit. The ion selective electrode array unit is integrated in the electrolytic cell and the electrolyte flow path, respectively for Al 3+ 、F - Ions can be specifically identified and selectively responded to specific ions. 3+ 、F - When ions come into contact with ion-selective electrodes, specific chemical reactions will occur, generating corresponding ion concentration signals. The ion-selective electrodes convert these ion concentration signals into electrical signals, which are transmitted in real time to the data processing unit of the electrolyte dynamic balance management module through the data transmission unit. At the same time, the ion concentration real-time monitoring module will dynamically adjust the monitoring frequency and monitoring accuracy according to the control instructions from the electrolyte dynamic balance management module. When the electrolyte composition fluctuates greatly, the monitoring frequency and accuracy will be increased to obtain ion concentration change information more timely and accurately. When the electrolyte composition is relatively stable, the monitoring frequency and accuracy will be appropriately reduced to save system resources. The ion concentration real-time monitoring module will feed back the adjusted monitoring data to the electrolyte dynamic balance management module in real time to assist it in controlling the rehydration pump and waste liquid discharge valve to achieve dynamic balance of the electrolyte composition.

[0054] The electrolyte dynamic balance management module consists of a data processing unit, a rehydration control unit, a waste liquid discharge control unit and a system coordination unit. The data processing unit receives the ion concentration data transmitted by the ion concentration real-time monitoring module, the temperature data transmitted by the temperature control module and the current density data transmitted by the current density adjustment module. The data processing unit calculates the electrolyte ion concentration deviation ΔC based on the received ion concentration data and the preset ion concentration fluctuation range. i , the formula is When it is detected that the ion concentration exceeds the set fluctuation range of ±2%, the rehydration control unit and the waste liquid discharge control unit start to work. The rehydration control unit controls the rehydration pump to extract the corresponding electrolyte supplement from the reserve tank according to the calculation results of the data processing unit to replenish the missing ion components. The calculation formula is Where V el is the total volume of electrolyte in the electrolytic cell, is the concentration of the i-th ion in the reserve tank. This formula can accurately calculate the volume of electrolyte supplement required for each ion, ensuring that the amount of supplemented ions can restore the ion concentration in the electrolyte to the normal range. The waste liquid discharge control unit controls the waste liquid discharge valve to open according to the instructions of the data processing unit to discharge excess ion components. The discharge volume The calculation formula is This formula can be used to accurately calculate the volume of electrolyte that needs to be discharged to ensure that the ion concentration in the electrolyte will not be too high. The system coordination unit is communicated with the central control unit and receives collaborative control instructions issued by the central control unit based on the requirements for gradient oxide film generation. Based on these instructions, the system coordination unit coordinates the work between the temperature control module, the current density adjustment module and the ion concentration real-time monitoring module to ensure that the modules can collaborate efficiently and stably generate a gradient oxide film during the dynamic balance of the electrolyte composition. At the same time, the electrolyte dynamic balance management module will feed back the electrolyte composition adjustment status to the central control unit in real time so that the central control unit can further adjust the working parameters of each module according to actual conditions.

[0055] The gradient porosity dynamic control module includes a dynamic control unit and a central control unit. The dynamic control unit establishes two-way communication with the temperature control module, the current density control module and the ion concentration real-time monitoring module respectively to realize real-time data interaction. The central control unit pre-stores the surface treatment process program for the new energy aluminum alloy parts. During the processing, the central control unit receives the temperature data transmitted by the temperature data processing unit of the temperature control module, the current density data transmitted by the current data processing unit of the current density control module, and the ion concentration data transmitted by the ion concentration real-time monitoring module. The central control unit sends control instructions through the dynamic control unit according to the pre-stored program and the real-time data received. For example, when the central control unit determines that the electrolyte temperature needs to be adjusted to promote the formation of a dense structure in the inner layer of the oxide film, it will An instruction is sent to the dynamic adjustment unit. After receiving the instruction, the dynamic adjustment unit adjusts the working status of the heating unit and the cooling unit of the temperature control module to make the electrolyte temperature reach an appropriate value. At the same time, according to the process requirements, the central control unit will also adjust the output parameters of the current output unit of the current density adjustment module through the dynamic adjustment unit to dynamically adjust the electrolyte temperature and current density. In this process, by precisely controlling the temperature and current density, a gradient oxide film with a dense inner layer and a porous outer layer is generated on the surface of the aluminum alloy. The gradient porosity dynamic control module feeds back the adjustment status and the generated oxide film parameters (such as oxide film thickness, porosity distribution, etc.) to the electrolyte dynamic balance management module, so that the electrolyte dynamic balance management module can further optimize the electrolyte composition according to the generation of the oxide film to ensure the stability and consistency of the entire treatment process.

[0056] In summary, the surface treatment system based on new energy aluminum alloy parts provided in this embodiment realizes the treatment of the surface of aluminum alloy parts. The temperature control module ensures the stability of the electrolyte temperature and provides a suitable environment for the oxidation reaction. The current density adjustment module accurately controls the current density and realizes effective control of the porosity gradient of the oxide film. The real-time ion concentration monitoring module and the electrolyte dynamic balance management module cooperate with each other to maintain the stability of the electrolyte composition and ensure the consistency and sustainability of the oxidation reaction. The gradient porosity dynamic control module coordinates the work of each module according to data from various aspects to generate a gradient oxide film with a dense inner layer and a porous outer layer.

[0057] Example 2

[0058] like Figure 1 As shown, based on Example 1, this example describes in detail the specific steps of performing surface treatment on parts by a surface treatment system based on new energy aluminum alloy parts, and the specific steps are as follows:

[0059] Place the new energy aluminum alloy parts to be processed into the oxidation electrolytic tank;

[0060] injecting electrolyte into the oxidation electrolytic cell to provide a reaction medium for the anodic oxidation reaction;

[0061] The temperature sensor unit starts to collect electrolyte temperature data in real time and transmits the data to the temperature data processing unit in the form of digital signals;

[0062] The temperature data processing unit filters and de-noises the data, then transmits the initial temperature data to the data processing unit of the electrolyte dynamic balance management module, and waits to receive the target temperature value and control instructions;

[0063] The current sensor unit monitors the current in the circuit in real time and transmits the collected current data in the form of electrical signals to the current data processing unit;

[0064] The current data processing unit transmits the received current data to the data processing unit of the electrolyte dynamic balance management module and waits for the control instruction of the central control unit;

[0065] The ion selective electrode array unit specifically identifies ions, monitors their concentration changes in real time, and converts ion concentration signals into electrical signals;

[0066] After the signal processing unit amplifies and filters the electrical signal, the initial ion concentration data is transmitted in real time to the data processing unit of the electrolyte dynamic balance management module through the data transmission unit;

[0067] The data processing unit performs storage and preliminary analysis. At the same time, the system coordination unit establishes a communication connection with the central control unit and waits to receive collaborative control instructions;

[0068] The central control unit determines the initial electrolyte temperature and current density target values ​​according to the preset surface treatment process program;

[0069] The central control unit sends the initial temperature target value and control instructions to the temperature data processing unit of the temperature control module; and sends the initial current density target value and control instructions to the current data processing unit of the current density adjustment module;

[0070] After receiving the target temperature value and the control instruction, the temperature data processing unit compares the current actual temperature with the target temperature. If the actual temperature is lower than the target temperature, the temperature data processing unit sends a heating signal to the heating control unit, and the heating control unit controls the heating unit to heat the electrolyte. If the actual temperature is higher than the target temperature, the temperature data processing unit sends a cooling signal to the cooling control unit, and the cooling control unit controls the cooling unit to start a cycle cooling to lower the electrolyte temperature. During the adjustment process, the temperature sensor unit continuously monitors the temperature and feeds back to the temperature data processing unit to achieve closed-loop control until the electrolyte temperature stabilizes at the target value.

[0071] After receiving the target current density value and the control instruction, the current data processing unit compares the current actual current density with the target current density. If the actual current density is less than the target current density, the current data processing unit sends a signal to increase the current to the control circuit unit. The control circuit unit increases the output current by adjusting the output voltage, frequency and other parameters of the current output unit. If the actual current density is greater than the target current density, the current data processing unit sends a signal to decrease the current to the control circuit unit. The control circuit unit controls the current output unit to reduce the output current to ensure that the actual current density is stable at the target value.

[0072] During the anodic oxidation reaction, the ion concentration real-time monitoring module works continuously, and the ion selective electrode array unit monitors the ion concentration changes in real time;

[0073] The signal processing unit processes the converted electrical signal, and the data transmission unit transmits the real-time ion concentration data to the data processing unit of the electrolyte dynamic balance management module;

[0074] The data processing unit of the electrolyte dynamic balance management module receives real-time ion concentration data and compares it with the preset ion concentration standard value. If the ion concentration exceeds the set fluctuation range (±2%), the rehydration control unit controls the rehydration pump to extract the corresponding electrolyte supplement from the reserve tank based on the calculation results to replenish the missing ion components. The waste liquid discharge control unit controls the waste liquid discharge valve to open according to the instructions to discharge excess ion components and maintain the stability of the electrolyte composition.

[0075] The system coordination unit coordinates the work of the temperature control module, current density adjustment module and ion concentration real-time monitoring module according to the coordinated control instructions of the central control unit to ensure the coordinated operation of each module;

[0076] The central control unit continuously receives real-time data transmitted by the temperature control module, current density adjustment module and ion concentration real-time monitoring module, and sends adjustment instructions to the temperature control module and current density adjustment module through the dynamic adjustment unit according to the pre-stored process program;

[0077] The temperature control module adjusts the electrolyte temperature according to the instructions, and the current density adjustment module adjusts the current density according to the instructions. Under the synergistic effect of the two, a gradient oxide film with a dense inner layer and a porous outer layer is gradually formed on the surface of the aluminum alloy;

[0078] The gradient porosity dynamic control module feeds back the adjustment state and the generated oxide film parameters to the electrolyte dynamic balance management module so that the electrolyte dynamic balance management module can further optimize the electrolyte composition according to the generation of the oxide film;

[0079] When the gradient oxide film reaches the quality standard, the surface treatment is completed.

[0080] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. The surface treatment system based on new energy aluminum alloy parts is characterized by: The system consists of: temperature control module, current density adjustment module, ion concentration real-time monitoring module, oxidation reaction tank module, and electrolyte dynamic balance management module; The temperature control module is used to collect and adjust the temperature data in the electrolytic cell in real time, and transmit the data to the central control unit of the system, and provide a stable temperature environment for the electrolyte according to the control instructions of the central control unit; The current density adjustment module is used to monitor the output current intensity in real time, receive control instructions from the central control unit, and dynamically adjust the current density to control the porosity gradient of the oxide film on the surface of the aluminum alloy; The ion concentration real-time monitoring module integrates multiple ion selective electrode arrays on the electrolytic cell body and electrolyte flow path, respectively targeting Al 3+ 、F - The ions are monitored in real time. The ion selective electrode converts the detected ion concentration signal into an electrical signal, which is then processed by the signal amplification and filtering circuit and transmitted to the electrolyte dynamic balance management module. The gradient porosity dynamic control module dynamically adjusts the electrolyte temperature and current density to generate a gradient oxide film with a dense inner layer and a porous outer layer; The electrolyte dynamic balance management module receives the ion concentration data transmitted by the ion concentration real-time monitoring module, performs analysis and calculation, and determines the concentration deviation of each ion component in the electrolyte.

2. The surface treatment system for aluminum alloy parts based on new energy according to claim 1 is characterized in that: The temperature control module includes a temperature sensor unit, a heating control unit, a cooling control unit and a temperature data processing unit; The temperature sensor unit collects electrolyte temperature data in real time by measuring temperature, and transmits the data to the temperature data processing unit in the form of digital signals; After receiving the temperature data transmitted by the temperature sensor unit, the temperature data processing unit performs filtering and noise reduction processing on the data to remove interference signals, and transmits the processed data to the data processing unit of the electrolyte dynamic balance management module; The temperature data processing unit generates corresponding heating and cooling control signals based on the received target temperature value and control instructions. When the actual temperature is lower than the target temperature, the temperature data processing unit sends a heating signal to the heating control unit. The heating control unit controls the heating unit to heat the electrolyte with corresponding power according to the received signal. When the actual temperature is higher than the target temperature, the temperature data processing unit sends a cooling signal to the cooling control unit. The cooling control unit controls the cooling unit to start cyclic cooling according to the signal to lower the electrolyte temperature.

3. The surface treatment system for aluminum alloy parts based on new energy according to claim 1 is characterized in that: The current density adjustment module includes a current output unit, a current sensor unit, a control circuit unit and a current data processing unit; The current sensor unit is connected in series to the electrode circuit of the electrolytic cell body, monitors the current in the circuit in real time, and transmits the collected current data in the form of an electrical signal to the current data processing unit; The current data processing unit amplifies and pre-processes the received current data by analog-to-digital conversion, transmits the data to the data processing unit of the electrolyte dynamic balance management module, and receives control instructions from the central control unit; When the monitored actual current density is less than the target current density, the current data processing unit sends a signal to increase the current to the control circuit unit, and the control circuit unit increases the output current by adjusting the output voltage and frequency parameters of the current output unit. When the monitored actual current density is greater than the target current density, the current data processing unit sends a signal to decrease the current to the control circuit unit, and the control circuit unit controls the current output unit to reduce the output current.

4. The surface treatment system for aluminum alloy parts based on new energy according to claim 1 is characterized in that: The ion concentration real-time monitoring module includes an ion selective electrode array unit, a signal processing unit and a data transmission unit; The ion selective electrode array unit is integrated in the electrolytic cell body and the electrolyte flow path, respectively for Al 3+ 、F - Ions are specifically identified, their concentration changes are monitored in real time, and corresponding ion concentration signals are generated, and the ion concentration signals are converted into electrical signals; The signal processing unit amplifies and filters the converted electrical signal to remove noise interference in the signal, and the processed signal is transmitted in real time to the data processing unit of the electrolyte dynamic balance management module through the data transmission unit; The ion concentration real-time monitoring module dynamically adjusts the monitoring frequency and monitoring accuracy according to the control instructions, and at the same time feeds back the adjusted monitoring data to the electrolyte dynamic balance management module in real time to assist it in controlling the rehydration pump and the waste liquid discharge valve to achieve dynamic balance of the electrolyte components.

5. The surface treatment system for aluminum alloy parts based on new energy according to claim 1 is characterized in that: The gradient porosity dynamic control module includes a dynamic adjustment unit and a central control unit; The dynamic adjustment unit establishes two-way communication with the temperature control module, the current density adjustment module and the ion concentration real-time monitoring module respectively; The central control unit pre-stores a surface treatment process program, receives temperature data transmitted by the temperature data processing unit of the temperature control module, current density data transmitted by the current data processing unit of the current density adjustment module, and ion concentration data transmitted by the ion concentration real-time monitoring module; The central control unit sends control instructions through the dynamic adjustment unit according to the pre-stored program and the received real-time data; The dynamic adjustment unit adjusts the working status of the heating unit and cooling unit of the temperature control module and the output parameters of the current output unit of the current density adjustment module according to the control instructions, dynamically adjusts the electrolyte temperature and current density, and generates a gradient oxide film with a dense inner layer and a porous outer layer on the surface of the aluminum alloy. At the same time, the gradient porosity dynamic adjustment module feeds back the adjustment status and the generated oxide film parameters to the electrolyte dynamic balance management module.

6. The surface treatment system for aluminum alloy parts based on new energy according to claim 1 is characterized in that: The electrolyte dynamic balance management module includes a data processing unit, a liquid replenishment control unit, a waste liquid discharge control unit and a system coordination unit; The data processing unit receives the ion concentration data transmitted by the real-time ion concentration monitoring module, the temperature data transmitted by the temperature control module, and the current density data transmitted by the current density adjustment module, performs comprehensive analysis and calculation, and determines the concentration deviation of each ion component in the electrolyte; when it is detected that the ion concentration exceeds the set fluctuation range of ±2%, the rehydration control unit controls the rehydration pump to extract the corresponding electrolyte supplement from the reserve tank based on the calculation result of the data processing unit to replenish the missing ion components; The waste liquid discharge control unit controls the waste liquid discharge valve to open according to the instruction of the data processing unit to discharge the excess ion components; The electrolyte dynamic balance management module is communicatively connected to the central control unit, receives collaborative control instructions issued by the central control unit according to the requirements for gradient oxide film generation, and feeds back the electrolyte composition adjustment status to the central control unit in real time to ensure that the gradient oxide film is stably generated during the dynamic balance of the electrolyte composition.

7. The surface treatment system for aluminum alloy parts based on new energy according to claim 6 is characterized in that: The data processing unit calculates the electrolyte ion concentration deviation based on the received ion concentration data, combined with the preset ion concentration fluctuation range and temperature and current density data. where ΔC i is the concentration deviation of the i-th ion, is the actual measured concentration of the i-th ion, provided by the ion concentration real-time monitoring module, is the target concentration of the i-th ion and is a set fixed value. According to the concentration deviation, the rehydration control unit and the waste liquid discharge control unit calculate the rehydration amount and the discharge amount. The rehydration amount The amount of liquid discharged in, is the volume of electrolyte supplement required to replenish the i-th ion, is the volume of electrolyte that the i-th ion needs to be discharged, V ztj is the total volume of electrolyte in the electrolytic cell, is the concentration of the i-th ion in the storage tank; The data processing unit calculates the target temperature value according to the temperature range of 5-40℃ preset by the central control unit and the change of electrolyte composition, and feeds the target temperature value and control instructions back to the temperature data processing unit. The target temperature value T mb =T base +ΔT ion , where T mb is the target temperature of the electrolyte, T base is the basic temperature, ranging from 5-40℃, ΔT ion is the temperature adjustment caused by the change in ion concentration; The data processing unit calculates the target current density value required at present according to the received current data, temperature data and electrolyte ion concentration data, and sends the target current density value and control instructions to the current data processing unit. Among them, I mb is the target current density, I jc is the basic current density, α is the correction factor used to adjust the degree of influence of ion concentration changes on current density, n is the number of ions, It is the sum of the concentration deviations of all monitored ions relative to the target concentration.

8. A surface treatment method for aluminum alloy parts based on new energy, applicable to a surface treatment system for aluminum alloy parts based on new energy according to any one of claims 1 to 7, characterized in that: The specific steps of this method are: S100, placing new energy aluminum alloy components into an electrolytic cell, and injecting electrolyte into the electrolytic cell; S200, adjusting the electrolyte temperature to a set temperature range through the temperature control module, and adjusting the current density to an initial set value through the current density adjustment module, and starting the oxidation reaction; S300, during the oxidation reaction, the ion concentration monitoring module monitors the ion concentration in the electrolyte in real time and transmits the data to the electrolyte dynamic balance control module; S400, the electrolyte dynamic balance control module, calculates the ion concentration data received through an intelligent algorithm, controls the rehydration pump to replenish the missing ion components, and controls the waste liquid discharge valve to discharge the excess components, maintaining the electrolyte composition stable within a fluctuation of ±2%; S500: Continuously adjust the electrolyte temperature and current density to form a gradient oxide film with a dense inner layer and a porous outer layer on the surface of the aluminum alloy to complete the surface treatment.

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