A test apparatus for offline simulation of alkaline washing and degreasing of automotive panels

CN224708026UActive Publication Date: 2026-09-01SHOUGANG JINGTANG IRON & STEEL CO LTD
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Patent Information

Application Number
CN202521708016.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-11
Publication Date
2026-09-01
Estimated Expiration
2035-08-11

AI Technical Summary

Technical Problem

[0004]针对现有技术中存在的缺陷,本申请提供一种用于离线模拟汽车板碱洗脱脂的试验装置,以解决现有技术中的碱洗脱脂设备稳定性差且无法进行离线模拟的问题

Benefits of technology

[0023]本申请中的试验装置用于离线模拟汽车板碱洗脱脂作业,所述试验装置包括主体件、预处理件、第一连通件、第二连通件、温度传感器、酸碱度传感器以及处理器,主体件的内部设有用于容置汽车板的第一空间;预处理件的内部设有用于容置处理液的第二空间;第一连通件相连通的设于所述第一空间与所述第二空间之间,所述第一连通件上设有动力件,所述动力件用于驱动所述第二空间内的所述处理液通过所述第一连通件进入所述第一空间;第二连通件相连通的设于所述第一空间与所述第二空间之间,以用于引导所述第一空间内的所述处理液进入所述第二空间;温度传感器以及酸碱度传感器,分别设置在所述第二空间内;处理器分别连接所述温度传感器和所述酸碱度传感器,并用于接收并处理所述温度传感器以及所述酸碱度传感器输出的信号。

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Abstract

This utility model discloses an experimental device for offline simulation of alkaline washing and degreasing of automotive body panels. It includes a main body, a pretreatment component, a first connecting component, a second connecting component, a temperature sensor, a pH sensor, and a processor. By separating the main body and the pretreatment component, the automotive body panel and the treatment liquid are placed in a first space and a second space respectively, effectively preventing the treatment liquid from contacting the automotive body panel without precise control, thus ensuring the stability of the experimental environment. Guided by the first connecting component, the treatment liquid can flow regularly from the second space into the first space, simulating the dynamic flow of the treatment liquid in actual production. This ensures the uniformity and consistency of the degreasing effect, improves the utilization rate of the treatment liquid, and ensures that the treatment liquid is always in an optimal degreasing state by continuously updating it, thus improving the stability of the degreasing effect. It can accurately simulate the degreasing process in actual production and monitor and control the process parameters in real time.
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Description

Technical Field

[0001] This application relates to the field of automotive panel processing technology, and in particular to a test apparatus for offline simulation of alkaline washing and degreasing of automotive panels. Background Technology

[0002] In automobile production, the cleaning and pretreatment of automotive sheet metal surfaces directly impacts coating quality. A common cleaning method is alkaline degreasing, which removes grease and dirt from metal surfaces. However, due to differences in different metal sheets and coatings, the degreasing effect varies during production. Therefore, accurately simulating and evaluating the performance of different coating products during the degreasing process is crucial for optimizing the coating process.

[0003] However, existing alkaline degreasing equipment is mostly production line equipment, which cannot accurately simulate the experimental environment, leading to discrepancies between test results and actual production processes. Furthermore, existing equipment lacks precise simulation and standardized evaluation of degreasing effects for different coating materials. Existing technologies suffer from problems such as unstable degreasing effects, poor coating adaptability, imprecise control of the experimental environment, and a lack of standards for evaluating degreasing effects. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a test device for offline simulation of alkaline washing and degreasing of automotive panels, thereby solving the problems of poor stability and inability to perform offline simulation in existing alkaline washing and degreasing equipment.

[0005] The above-mentioned objectives of this application are mainly achieved through the following technical solutions:

[0006] A test apparatus for offline simulation of alkaline washing and degreasing of automotive panels, the test apparatus comprising:

[0007] The main component has a first space inside for accommodating the automotive panel;

[0008] The pretreatment unit has a second space inside for containing the treatment liquid;

[0009] A first connecting member is disposed between the first space and the second space. A power member is provided on the first connecting member. The power member is used to drive the treatment liquid in the second space to enter the first space through the first connecting member.

[0010] A second connecting member is disposed between the first space and the second space to guide the treatment liquid in the first space into the second space.

[0011] Temperature and pH sensors are respectively installed in the second space;

[0012] The processor is connected to the temperature sensor and the pH sensor respectively, and is used to receive and process the signals output by the temperature sensor and the pH sensor.

[0013] In an optional embodiment, the test apparatus further includes a heating element disposed in the second space for heating the treatment liquid.

[0014] In an optional implementation, the processor is connected to the heating element and can control the heating element to start / stop and / or adjust its power.

[0015] In an optional embodiment, one end of the second connecting member is disposed through the side wall of the pre-processing member, and a first height difference is provided between one end of the second connecting member and the bottom of the second space, and the first height difference is greater than the height of the car panel.

[0016] In an optional embodiment, a third connecting member is provided between the main body and the pretreatment member, the third connecting member being connected to the bottom of the main body and having a control valve provided on the third connecting member.

[0017] In an optional embodiment, the top of the main body is provided with an openable and closable top cover.

[0018] In an optional embodiment, the main body is provided with a bracket for supporting the car body, and the bracket is positioned above the bottom surface of the first space.

[0019] In an optional embodiment, the bracket is provided with a plurality of positioning elements, and adjacent positioning elements are used to hold the car panel in place.

[0020] In an optional embodiment, one side of the positioning element is arranged as an inclined surface.

[0021] In an optional embodiment, a display is connected to both the temperature sensor and the pH sensor, and the display is located outside the pretreatment unit.

[0022] Compared with the prior art, the advantages of this application are:

[0023] The experimental apparatus described in this application is used for offline simulation of alkaline washing and degreasing operations on automotive panels. The apparatus includes a main body, a pretreatment component, a first connecting component, a second connecting component, a temperature sensor, a pH sensor, and a processor. The main body has a first space for accommodating the automotive panel; the pretreatment component has a second space for accommodating the treatment liquid; the first connecting component is disposed between the first and second spaces, and a power component is mounted on the first connecting component to drive the treatment liquid in the second space through the first connecting component into the first space; the second connecting component is disposed between the first and second spaces to guide the treatment liquid in the first space into the second space; the temperature sensor and the pH sensor are respectively disposed in the second space; the processor is connected to the temperature sensor and the pH sensor, and is used to receive and process the signals output by the temperature sensor and the pH sensor.

[0024] The experimental setup, through the separate arrangement of the main body and pretreatment components, places the automotive panel and the treatment fluid in a first space and a second space respectively. This effectively prevents the treatment fluid from contacting the automotive panel without precise control, thus ensuring the stability of the experimental environment. The power unit allows the treatment fluid, guided by the first connecting component, to flow systematically from the second space into the first space, thereby contacting the automotive panel and performing degreasing. This process simulates the dynamic flow of the treatment fluid in actual production, ensuring the uniformity and consistency of the degreasing effect.

[0025] The second connecting element allows the treatment solution to return to the second space after degreasing, forming a stable circulation system. This not only improves the utilization rate of the treatment solution but also ensures it remains in optimal degreasing condition through continuous replenishment. Simultaneously, temperature and pH sensors monitor these two key parameters in real time. The processor receives and processes the signals from these sensors, enabling precise control of the degreasing process. Through this real-time monitoring and control mechanism, the device can dynamically adjust degreasing conditions according to the characteristics of different coating materials, ensuring the stability and adaptability of the degreasing effect.

[0026] From a kinetic perspective, the movement of the power unit drives the processing fluid to circulate between the first and second spaces, simulating the dynamic degreasing environment in actual production. By precisely controlling the speed and frequency of the power unit's movement, the flow rate and volume of the processing fluid can be adjusted, thus affecting the degreasing effect. Simultaneously, the real-time feedback mechanism of temperature and pH sensors allows the processor to dynamically adjust the movement state of the power unit based on monitored parameter changes, ensuring the processing fluid is always under optimal degreasing conditions. This improves the stability of the degreasing effect and enhances the device's adaptability to different coating materials, effectively solving the problems of unstable degreasing effects, poor coating adaptability, imprecise experimental environment control, and lack of degreasing effect evaluation standards in existing technologies. It can accurately simulate the degreasing process in actual production and monitor and control process parameters in real time. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the structure of the test apparatus provided in the embodiments of this application;

[0029] Figure 2 This is a top view of the bracket provided in an embodiment of this application;

[0030] In the diagram: 100, main body component; 101, first space; 102, top cover; 103, bracket; 104, positioning component; 200, pretreatment component; 201, second space; 301, first connecting component; 302, second connecting component; 303, third connecting component; 304, power component; 401, control valve; 402, temperature sensor; 403, pH sensor; 404, display; 405, heating component; 500, automotive panel. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the present invention, but does not constitute a limitation thereof. The specific structural and functional details disclosed herein are only for describing exemplary embodiments of the present invention. However, the present invention may be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0032] like Figure 1 As shown, Figure 1 This is a schematic diagram of the experimental device provided in the embodiments of this application; an experimental device for offline simulation of alkaline washing and degreasing of automotive panels, which can effectively simulate the degreasing process in actual production and monitor and optimize the degreasing effect in real time. The experimental device includes a main body 100, a pretreatment component 200, a first connecting component 301, a second connecting component 302, a temperature sensor 402, a pH sensor 403, and a processor, wherein:

[0033] like Figure 1 As shown, the main body 100 has a first space 101 inside for accommodating the car panel 500. The arrangement of the first space 101 takes into full account the size and shape of the car panel 500 to ensure that it can be stably placed therein.

[0034] The pretreatment unit 200 has a second space 201 for containing the treatment liquid. The capacity and shape of the second space 201 are optimized according to actual needs to ensure that the treatment liquid can be evenly distributed and circulated efficiently.

[0035] like Figure 1 As shown, a first connecting member 301 is disposed between the first space 101 and the second space 201. A power member 304 is provided on the first connecting member 301. The power member 304 is used to drive the treatment liquid in the second space 201 to enter the first space 101 through the first connecting member 301.

[0036] A first connecting member 301 is disposed between the first space 101 and the second space 201 to ensure that the treatment fluid can flow smoothly from the second space 201 to the first space 101. A power component 304 is provided on the first connecting member 301. This power component 304 can be a pump or other driving device, used to drive the treatment fluid in the second space 201 through the first connecting member 301 into the first space 101. The motion principle of the power component 304 is based on fluid mechanics; by precisely controlling its rotational speed and flow rate, uniform distribution and efficient circulation of the treatment fluid can be achieved.

[0037] like Figure 1 As shown, the second connecting member 302 is disposed between the first space 101 and the second space 201 to guide the processing liquid in the first space 101 into the second space 201.

[0038] The second connecting member 302 is disposed between the first space 101 and the second space 201. The function of the second connecting member 302 is to guide the treatment liquid in the first space 101 back into the second space 201, forming a closed circulation system. This circulation mechanism not only improves the utilization rate of the treatment liquid, but also ensures that it is always in the optimal degreasing state by continuously refreshing the treatment liquid.

[0039] like Figure 1 As shown, temperature sensor 402 and pH sensor 403 are respectively disposed within the second space 201. The processor is connected to both temperature sensor 402 and pH sensor 403, and is used to receive and process the signals output by both sensors. Temperature sensor 402 and pH sensor 403 are used to monitor the temperature and pH of the treatment solution in real time. These two parameters are key factors affecting the degreasing effect; accurate monitoring ensures the stability and consistency of the degreasing process. The processor is connected to both temperature sensor 402 and pH sensor 403, and is used to receive and process the signals output by both sensors. Based on these signals, the processor can dynamically adjust the movement state of the power component 304, and can also simultaneously control other equipment to replenish and adjust the treatment solution, ensuring that the treatment solution is always under optimal degreasing conditions.

[0040] From the perspective of motion principles, the movement of the power unit 304 drives the processing fluid to circulate between the first space 101 and the second space 201. By precisely controlling the movement speed and frequency of the power unit 304, the flow rate and volume of the processing fluid can be adjusted, thereby affecting the degreasing effect. Simultaneously, the real-time feedback mechanism of the temperature and pH sensors 403 allows the processor to dynamically adjust the movement state of the power unit 304 based on monitored parameter changes, ensuring the processing fluid is always under optimal degreasing conditions. This not only improves the stability of the degreasing effect but also enhances the device's adaptability to different coating materials.

[0041] This testing device is suitable for various automotive sheet materials and coating types, and can dynamically adjust degreasing conditions according to the characteristics of different materials. It can accurately simulate the degreasing process in actual production and monitor and optimize the degreasing effect in real time. Through this offline simulation method, users can evaluate the degreasing effect of different coating materials in advance in an experimental environment, thus providing strong technical support for optimizing coating processes.

[0042] The experimental device described in this application is used for offline simulation of alkaline washing and degreasing operations on automotive panels. The experimental device includes a main body 100, a pretreatment component 200, a first connecting component 301, a second connecting component 302, a temperature sensor 402, a pH sensor 403, and a processor. The main body 100 has a first space 101 for accommodating the automotive panel 500; the pretreatment component 200 has a second space 201 for accommodating the treatment liquid; the first connecting component 301 is disposed between the first space 101 and the second space 201, and a power component 304 is provided on the first connecting component 301. The power component 304 is used for... The processing liquid in the second space 201 is driven to enter the first space 101 through the first connecting member 301; the second connecting member 302 is disposed between the first space 101 and the second space 201 to guide the processing liquid in the first space 101 into the second space 201; a temperature sensor 402 and a pH sensor 403 are respectively disposed in the second space 201; the processor is connected to the temperature sensor 402 and the pH sensor 403 respectively, and is used to receive and process the signals output by the temperature sensor 402 and the pH sensor 403.

[0043] The experimental apparatus, through the separate arrangement of the main body 100 and the pretreatment component 200, places the automotive panel 500 and the treatment liquid in the first space 101 and the second space 201 respectively. This effectively prevents the treatment liquid from contacting the automotive panel 500 without precise control, thus ensuring the stability of the experimental environment. The power component 304 allows the treatment liquid to flow regularly from the second space 201 into the first space 101 under the guidance of the first connecting component 301, thereby contacting the automotive panel 500 and performing degreasing. This process simulates the dynamic flow of the treatment liquid in actual production, ensuring the uniformity and consistency of the degreasing effect.

[0044] The second connecting piece 302 allows the treatment solution to return to the second space 201 after degreasing, forming a stable circulation system. This not only improves the utilization rate of the treatment solution but also ensures it remains in optimal degreasing condition through continuous replenishment. Simultaneously, the temperature sensor 402 and pH sensor 403 monitor the two key parameters of the treatment solution in real time. The processor receives and processes the signals output from these sensors, thereby achieving precise control of the degreasing process. Through this real-time monitoring and control mechanism, the device can dynamically adjust degreasing conditions according to the characteristics of different coating materials, ensuring the stability and adaptability of the degreasing effect.

[0045] From the perspective of motion principles, the movement of the power component 304 drives the processing fluid to circulate between the first space 101 and the second space 201, simulating the dynamic degreasing environment in actual production. By precisely controlling the movement speed and frequency of the power component 304, the flow rate and volume of the processing fluid can be adjusted, thereby affecting the degreasing effect. Simultaneously, the real-time feedback mechanism of the temperature and pH sensors 403 allows the processor to dynamically adjust the movement state of the power component 304 based on monitored parameter changes, ensuring the processing fluid is always under optimal degreasing conditions. This improves the stability of the degreasing effect and enhances the device's adaptability to different coating materials, effectively solving the problems existing in the prior art, such as unstable degreasing effect, poor coating adaptability, imprecise experimental environment control, and lack of degreasing effect evaluation standards. It can accurately simulate the degreasing process in actual production and monitor and control process parameters in real time.

[0046] like Figure 1 As shown, in an optional embodiment, the test apparatus further includes a heating element 405 disposed in the second space 201 for heating the treatment liquid.

[0047] The arrangement of the heating element 405 is to ensure that the treatment liquid remains within a suitable temperature range during the degreasing process, which is crucial for improving degreasing efficiency and effectiveness. The heating element 405 can be an electric heating wire, heating rod, or other high-efficiency heating element, and its selection fully considers heating efficiency and safety.

[0048] In an optional embodiment, the processor is connected to the heating element 405 and can control the heating element 405 to start / stop and / or adjust its power.

[0049] The processor can control the start / stop and / or adjust the power of the heating element 405. By intelligently controlling the power of the heating element 405, the processor can dynamically adjust the heating power based on real-time temperature data fed back by the temperature sensor 402, ensuring that the temperature of the processed liquid remains stable at the set value. This intelligent control mechanism not only improves the stability of the degreasing process but also saves energy and reduces unnecessary energy consumption.

[0050] like Figure 1 As shown, in an optional embodiment, one end of the second connecting member 302 is disposed through the side wall of the pretreatment member 200, and a first height difference is provided between one end of the second connecting member 302 and the bottom of the second space 201, and the first height difference is greater than the height of the car panel 500.

[0051] The arrangement height of one end of the second connecting member 302 is controlled. This ensures that the treatment fluid can flow smoothly from the first space 101 back to the second space 201 during circulation, while preventing the treatment fluid from splashing or overflowing during circulation, thus improving the stability and safety of the device.

[0052] like Figure 1 As shown, in an optional embodiment, a third connecting member 303 is provided between the main body 100 and the pretreatment member 200. The third connecting member 303 is connected to the bottom of the main body 100, and a control valve 401 is provided on the third connecting member 303.

[0053] The third connecting component 303 further optimizes the circulation path of the treatment fluid. By adjusting the control valve 401, the user can flexibly control the flow rate and velocity of the treatment fluid according to experimental needs. This arrangement not only improves the flexibility of the device but also provides users with more operating options to adapt to different experimental scenarios. It also facilitates the complete drainage of the treatment fluid within the main component 100, simplifying maintenance.

[0054] like Figure 1 As shown, in an optional embodiment, the main body 100 is provided with an openable and closable top cover 102. The top cover 102 facilitates easy placement and removal of the automotive panel 500 by the user during the experiment, and also provides good sealing for the experimental device, preventing external impurities from entering the first space 101 and affecting the degreasing effect. The top cover 102 can be made of transparent material, allowing the user to observe the experimental process in real time.

[0055] like Figure 1 , Figure 2 As shown, Figure 2 This is a top view of the bracket 103 provided in an embodiment of this application. In an optional embodiment, the main body 100 is provided with a bracket 103 for supporting the automotive panel 500, and the bracket 103 is positioned higher than the bottom surface of the first space 101. The bracket 103 not only provides stable support for the automotive panel 500, but also ensures that the treatment fluid can fully contact all surfaces of the automotive panel 500, improving the degreasing effect. The height of the bracket 103 can be adjusted according to the size of the automotive panel 500 to accommodate different sizes of automotive panels 500.

[0056] like Figure 1 , Figure 2 As shown, in an optional embodiment, the bracket 103 is provided with a plurality of positioning members 104, and adjacent positioning members 104 are used to hold the automotive panel 500 in place. The positioning members 104 ensure that the automotive panel 500 remains stable during the degreasing process and avoids displacement due to the flow of the treatment liquid. This design improves the reliability and repeatability of the experiment.

[0057] like Figure 1 , Figure 2 As shown, in an optional embodiment, one side of the positioning member 104 is arranged as a slope. The slope facilitates the rapid positioning and locking of the vehicle panel 500, while reducing friction between the positioning member 104 and the vehicle panel 500, thus protecting the surface of the vehicle panel 500.

[0058] like Figure 1 As shown, in an optional embodiment, a display 404 is connected to both the temperature sensor 402 and the pH sensor 403, and the display 404 is located externally to the pretreatment unit 200. The arrangement of the display 404 allows the user to view the temperature and pH data of the treatment solution in real time, facilitating precise monitoring of the experimental process. Through the external display 404, the user can intuitively understand the changes in key parameters during the degreasing process, adjust experimental conditions in a timely manner, and ensure optimal degreasing results.

[0059] It should be understood that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of this utility model.

[0060] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0061] It should be understood that in the description of this utility model, the terms "upper," "vertical," "inner," "outer," etc., indicate the orientation or positional relationship when the disclosed product is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0062] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0063] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “containing,” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0064] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may be omitted in the depiction of non-essential details to avoid obscuring the exemplary embodiments.

[0065] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0066] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

Claims

1. A test apparatus for simulating off-line caustic degreasing of automotive panels, characterized in that, The test apparatus includes: The main component has a first space inside for accommodating the automotive panel; The pretreatment unit has a second space inside for containing the treatment liquid; A first connecting member is disposed between the first space and the second space. A power member is provided on the first connecting member. The power member is used to drive the treatment liquid in the second space to enter the first space through the first connecting member. A second connecting member is disposed between the first space and the second space to guide the treatment liquid in the first space into the second space. Temperature and pH sensors are respectively installed in the second space; The processor is connected to the temperature sensor and the pH sensor respectively, and is used to receive and process the signals output by the temperature sensor and the pH sensor.

2. The test apparatus for simulating off-line alkaline degreasing of automotive panels according to claim 1, characterized in that: The test apparatus also includes a heating element disposed in the second space for heating the treatment liquid.

3. The test apparatus for simulating off-line alkaline degreasing of automotive panels according to claim 2, characterized in that: The processor is connected to the heating element and can control the heating element to start / stop and / or adjust its power.

4. The test apparatus for simulating off-line alkaline degreasing of automotive panels according to claim 1, characterized in that: One end of the second connecting member is disposed on the side wall of the pre-processing member, and a first height difference is provided between one end of the second connecting member and the bottom of the second space, and the first height difference is greater than the height of the car panel.

5. The test apparatus for simulating off-line alkaline degreasing of automotive panels according to claim 1, characterized in that: A third connecting member is provided between the main body and the pretreatment member. The third connecting member is connected to the bottom of the main body and a control valve is provided on the third connecting member.

6. The test apparatus for simulating off-line alkaline degreasing of automotive panels according to claim 1, characterized in that: The main body is provided with an openable and closable top cover.

7. The test apparatus for simulating off-line alkaline degreasing of automotive panels according to claim 1, characterized in that: The main body is provided with a bracket for supporting the car body, and the bracket is set higher than the bottom surface of the first space.

8. The test apparatus for simulating off-line alkaline degreasing of automotive panels according to claim 7, characterized in that: The bracket is provided with multiple positioning elements, and adjacent positioning elements are used to hold the car panel in place.

9. The test apparatus for simulating off-line alkaline degreasing of automotive panels according to claim 8, characterized in that: One side of the positioning element is arranged as an inclined surface.

10. The test apparatus for simulating off-line alkaline degreasing of automotive panels according to claim 1, characterized in that: The temperature sensor and the pH sensor are each connected to a display, and the display is located outside the pretreatment component.