A pressure testing system for automotive components

Abstract

The application discloses a pressure testing system for automobile accessories applied to the field of pressure testing, which can simultaneously perform pressure testing on multiple automobile accessories, thereby effectively improving the testing efficiency, and can complete the detection of the wear of the edges of the pressure head within the time interval of feeding and discharging the accessories each time the detection is performed, compared with the prior art, the synchronous detection of the wear of the pressure head can be realized without affecting the detection efficiency of the automobile accessories, early wear of the pressure head can be found in time, the influence of the detection result of the automobile accessories is reduced, and the wear detection process of the pressure head does not need to occupy additional time; in cooperation with the design of the wear identification sheet, slight wear of the edges of the pressure head can be converted into visual display, the detection difficulty can be reduced, wear abnormalities can be found in time during the testing process, and the situation that the automobile accessories are tested under abnormal conditions of the pressure head can be effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of pressure testing, and in particular to a pressure testing system for automotive parts. Background Technology

[0002] In the modern automotive industry, a large number of small, sheet-like precision components are used, such as brake pads, clutch friction plates, various metal or non-metal gaskets, battery module end plates, and bipolar plates for new energy fuel cells. Although these components are small in size, they are often located in critical systems such as transmission, braking, and sealing. Their mechanical properties, especially their reliability, durability, and sealing performance under pressure, directly affect the safety, energy efficiency, and service life of the entire vehicle. Therefore, conducting scientific and precise pressure tests on these components before they leave the factory is an indispensable and crucial step in quality control.

[0003] When testing equipment performs pressure tests on these small, sheet-like components, the contact edges of the pressure test head (or indenter), a key component that directly applies the load, inevitably wear down during long-term, high-frequency testing cycles. Minor edge wear or localized defects can alter the uniformity of pressure distribution. However, due to the small size of these components, the worn pressure test head severely affects the accuracy of the test results, potentially leading to some defective parts not being rejected and being released into service. These defective parts have a shorter lifespan than expected, and as they approach their actual lifespan, they can pose significant safety hazards to vehicles.

[0004] However, in existing technologies, pressure test heads are typically inspected for wear periodically in order to replace or maintain them. However, this periodic inspection method makes it difficult to detect early wear of the pressure head, resulting in some deviations in the test results of some automotive parts. Summary of the Invention

[0005] The core of this invention lies in its multi-station design, which effectively improves the efficiency of pressure testing for automotive parts. Furthermore, each test allows for the detection of wear on the indenter edge during the part loading and unloading process, thus addressing the problem of significant test result errors caused by abnormal indenter wear in existing technologies. Simultaneously, the design of a wear detection plate visually identifies minor wear on the indenter edge, reducing testing difficulty and enabling timely detection of abnormal wear during testing, effectively preventing automotive parts from being tested with abnormal indenters.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A pressure testing system for automotive parts includes a testing equipment body. An electric cylinder is fixedly installed on the top of the testing equipment body. The extended end of the electric cylinder movably passes through the top of the testing equipment body and is fixedly connected to a multi-station testing component. An inclined mounting plate is fixedly connected to the top of the testing equipment body. Multiple evenly distributed display screens are installed at the front end of the inclined mounting plate. A support plate is provided at the bottom of the testing equipment body. Multiple evenly distributed pressure testing slots are carved on the upper end of the support plate. The multi-station testing component includes a main pressure plate, a central pressure plate fixedly connected to the middle of the lower end of the main pressure plate, and multiple pressure testing components respectively connected to the lower end of the central pressure plate. Two guide rods are also fixedly connected between the upper and lower inner walls of the testing equipment body. Both guide rods movably pass through the main pressure plate. The multiple pressure testing components correspond to the multiple pressure testing slots. The pressure testing component includes a support column, a cover plate fixedly connected to the outer end of the support column by bolts, and a pressure actuator fixedly connected between the support column and the cover plate. The pressure actuator includes a connecting rod, a pressure head located below the connecting rod, and a pressure sensor connected between the two. The multiple pressure sensors are respectively connected to the multiple display screens. Electric push rods are fixedly connected to the inner walls of both sides of the test equipment body, and T-shaped corner plates are fixedly connected to the outer ends of both sides of the bearing plate. The extended ends of the electric push rods are fixedly connected to the T-shaped corner plates, and the T-shaped corner plates face the front end of the test equipment body. Multiple evenly distributed detection grooves are also carved into the bearing plate. Wear identification plates are set in the detection grooves. Multiple wear identification plates correspond to multiple pressure test grooves, and the wear identification plates are located on the side of the pressure test groove facing the rear of the test equipment body. At least two high-definition cameras are fixedly connected to the lower end of the main pressure plate. The high-definition cameras are located above the multiple wear identification plates.

[0008] Furthermore, the diameter of the wear identification plate is larger than the diameter of the pressure head, and the upper end of the wear identification plate is clamped with a force-induced color-changing layer.

[0009] Furthermore, the wear identification piece includes a concave measuring plate fixedly connected in the detection tank and an annular liquid holding tank fixedly connected at the edge of the detection tank. A bottom bearing cavity is excavated at the bottom of the detection tank, and multiple L-shaped holes corresponding to multiple wear identification pieces are excavated in the bearing plate. The L-shaped holes connect the bottom bearing cavity and the annular liquid holding tank, and the bottom bearing cavity is filled with test liquid.

[0010] Furthermore, the test solution is a uniform mixture of electrorheological fluid and colored liquid in a volume ratio of 3-10:1, and the color of the bottom wall of the concave test plate is complementary to the color of the colored liquid.

[0011] Furthermore, a sealing ring is also snapped onto the upper end of the concave measuring plate. The sealing ring includes a ring body that is completely snapped onto the upper end of the concave measuring plate and a covering film that is fixedly embedded in the inner wall of the ring body.

[0012] Furthermore, the covering film is made of a flexible, insulating, transparent material, and the concave measuring plate has an open design.

[0013] Furthermore, an annular groove is chiseled at the bottom edge of the concave measuring plate, and multiple evenly distributed through holes are chiseled at the bottom of the annular groove. The through holes connect the annular groove and the bottom bearing cavity, and the liquid level of the test liquid is higher than the upper edge of the annular groove.

[0014] A pressure testing system for automotive parts, the pressure testing method comprising the following steps: S1. When in use, first drive the bearing plate toward the front end of the test equipment body by the electric push rod, so that multiple pressure test slots move forward, and at the same time, make multiple wear identification plates just below multiple pressure test components. S2. Then, remove the tested automotive parts from the multiple pressure test chambers and place new parts to be tested. At the same time, use an electric cylinder to synchronously drive multiple pressure test components to extend and squeeze the wear identification plate. S3. Control the pressure testing component to rise, and then drive the carrier plate to move in the opposite direction through the electric push rod until multiple accessories are located directly below the pressure testing component. At the same time, multiple wear identification plates are located below the high-definition camera. The high-definition camera acquires the color marks produced by the multiple wear identification plates due to the force, and judges the wear condition of the pressure testing component based on the color marks. S4. If no obvious wear is observed, the electric cylinder directly drives multiple pressure testing components to move downwards and exert pressure on the parts. If obvious wear is observed, the testing work is stopped, and the pressure testing components are maintained accordingly before continuing to perform pressure testing on the automotive parts.

[0015] Compared with the prior art, the advantages of this invention are: (1) This solution can effectively improve the pressure testing efficiency of automotive parts through the design of multiple workstations. Moreover, the wear of the pressure head edge can be detected once during the gap between loading and unloading of the parts for each test, so as to solve the problem of large error in test results caused by abnormal wear of the pressure head in the prior art. Furthermore, the process of detecting the wear of the pressure head does not require additional time. Compared with the prior art, it can realize the synchronous detection of the wear of the pressure head without affecting the testing efficiency of automotive parts, so as to facilitate the timely detection of early wear and reduce the impact on the testing results of automotive parts.

[0016] (2) With the design of the wear identification plate, the slight wear on the edge of the pressure head can be transferred to a visual display, which can reduce the difficulty of detection and detect abnormal wear in time during the test, effectively avoiding the situation where automotive parts are tested under abnormal pressure head conditions. Attached Figure Description

[0017] Figure 1 This is a perspective view of the front end of the present invention; Figure 2 This is a perspective view of the rear end of the present invention; Figure 3 This is a partial perspective view of the multi-station testing component of the present invention; Figure 4 This is a schematic diagram of the invention during edge wear testing of the pressure head; Figure 5 This is an exploded view of the pressure testing component of the present invention; Figure 6 This is a cross-sectional view of the wear detection plate of the present invention; Figure 7 This is a schematic diagram of the pressure head of the present invention in contact with the wear identification plate; Figure 8 This is a cross-sectional schematic diagram of the wear identification sheet when the pressure head of the present invention is energized after a wear test to solidify the test fluid; Figure 9 for Figure 8 A schematic diagram of point A in the middle.

[0018] Explanation of the labels in the diagram: 1 Test equipment body, 11 sloping mounting plate, 12 display screen, 2 electric cylinder, 31 main pressure plate, 32 center pressure plate, 301 guide rod, 4 bearing plate, 41 electric push rod, 42 T-shaped corner plate, 401 pressure test groove, 5 pressure test assembly, 51 bearing column, 52 cover plate, 531 pressure head, 532 connecting rod, 501 pressure sensor, 6 wear identification plate, 61 concave measuring plate, 62 covering membrane, 63 annular liquid holding tank, 601 annular side groove, 602 bottom bearing cavity, 603 L-shaped hole. Detailed Implementation

[0019] First implementation method: like Figures 1-2 A pressure testing system for automotive parts includes a testing equipment body 1, an electric cylinder 2 fixedly mounted on the top of the testing equipment body 1, the extended end of the electric cylinder 2 movably passing through the top of the testing equipment body 1 and fixedly connected to a multi-station testing component, a sloping mounting plate 11 fixedly connected to the top of the testing equipment body 1, and multiple evenly distributed display screens 12 mounted on the front end of the sloping mounting plate 11.

[0020] like Figure 3The test equipment body 1 has a support plate 4 at its bottom. Multiple evenly distributed pressure test slots 401 are carved into the upper end of the support plate 4. The multi-station test assembly includes a main pressure plate 31, a central pressure plate 32 fixedly connected to the lower center of the main pressure plate 31, and multiple pressure testing components 5 respectively connected to the lower end of the central pressure plate 32. Two guide rods 301 are also fixedly connected between the upper and lower inner walls of the test equipment body 1. Both guide rods 301 movably pass through the main pressure plate 31. The multiple pressure testing components 5 correspond to the multiple pressure test slots 401 respectively. Figure 5 The pressure testing assembly 5 includes a support column 51, a cover plate 52 fixedly connected to the outer end of the support column 51 by bolts, and a pressure actuator fixedly connected between the support column 51 and the cover plate 52. The pressure actuator includes a connecting rod 532, a pressure head 531 located below the connecting rod 532, and a pressure sensor 501 connected between the two. Multiple pressure sensors 501 are respectively connected to multiple display screens 12, so that multiple display screens 12 can independently display the pressure test status of the accessories on the corresponding pressure test slots 401, which facilitates the synchronous testing of multiple automotive accessories in this solution and thus effectively speeds up the testing efficiency.

[0021] like Figures 3-4 In the figure, 'a' represents a high-definition camera. Electric push rods 41 are fixedly connected to the inner walls of the left and right sides of the test equipment body 1. T-shaped corner plates 42 are fixedly connected to the outer ends of the left and right sides of the bearing plate 4. The extended ends of the electric push rods 41 are fixedly connected to the T-shaped corner plates 42, and the T-shaped corner plates 42 face the front end of the test equipment body 1. Multiple evenly distributed detection grooves are also carved on the bearing plate 4. Wear identification plates 6 are set in the detection grooves. Multiple wear identification plates 6 correspond to multiple pressure test grooves 401 respectively, and the wear identification plates 6 are located on the side of the pressure test grooves 401 facing the rear of the test equipment body 1. At least two high-definition cameras are fixedly connected to the lower end of the main pressure plate 31. The high-definition cameras are located above the multiple wear identification plates 6. The high-definition cameras can directly obtain the color imprint pattern on the wear identification plates 6 after each wear test on the pressure head 531, which is convenient for capturing abnormal wear of the pressure head 531.

[0022] The diameter of the wear identification plate 6 is larger than the diameter of the pressure head 531, so that when the pressure head 531 is worn, the pressure head 531 can fall completely into the wear identification plate 6 and make contact with it, thereby forming a mark on the wear identification plate 6 corresponding to the pressure head 531. In addition, the upper end of the wear identification plate 6 is clamped with a force-changing color layer, so that the upper surface of the wear identification plate 6 can show obvious color marks after being subjected to force.

[0023] A pressure testing system for automotive parts, the pressure testing method comprising the following steps: S1. In use, the electric push rod 41 drives the support plate 4 to move toward the front end of the test equipment body 1, so that multiple pressure test slots 401 move forward, and at the same time, multiple wear identification plates 6 are located directly below multiple pressure test components 5. S2. Then, remove the tested automotive parts from the multiple pressure test chambers 401 and place new parts to be tested. At the same time, drive multiple pressure test components 5 to extend and squeeze the wear identification plate 6 through the electric cylinder 2, so that the force-induced color-changing layer on the wear identification plate 6 can undergo obvious color imprint changes. S3. Control the pressure testing component 5 to rise, and then drive the bearing plate 4 to move in the opposite direction through the electric push rod 41 until multiple accessories are located directly below the pressure testing component 5. At the same time, multiple wear identification pieces 6 are located below the high-definition camera. The high-definition camera acquires the color marks produced by the multiple wear identification pieces 6 due to the force, and judges the wear condition of the pressure testing component 5 based on the color marks. Specifically, if the marks are clear and uniform, it means that the pressure head 531 has not experienced obvious early wear. If the color marks are unevenly distributed, the lighter color corresponds to the wear area of ​​the pressure head 531, and the greater the color difference between the lighter color and the clearer color, the more serious the wear condition. S4. If no obvious wear is found, the electric cylinder 2 directly drives multiple pressure testing components 5 to move down and exert pressure on the parts. If obvious wear is found, the test is stopped and the pressure testing components 5 are maintained. Then the pressure test on the automotive parts is continued.

[0024] In summary, this solution, through its multi-station design, can effectively improve the efficiency of pressure testing for automotive parts. Furthermore, during each test, the wear of the pressure head 531 edge can be inspected during the loading and unloading of the parts, thus solving the problem of large test result errors caused by abnormal wear of the pressure head 531 in existing technologies. Moreover, the wear inspection process for the pressure head 531 does not require additional time. Compared to existing technologies, this solution can simultaneously detect the wear of the pressure head 531 without affecting the testing efficiency of automotive parts, facilitating timely detection of early wear and reducing the impact on the testing results of automotive parts. Furthermore, the design of the wear identification piece 6 can transform slight wear on the edge of the pressure head 531 into a visual display, which can reduce the difficulty of detection and detect abnormal wear in time during the testing process, effectively preventing the occurrence of automotive parts being tested under abnormal conditions of the pressure head 531.

[0025] Second implementation method: This embodiment further improves the wear detection piece 6 based on the first embodiment, while the rest remains the same as the first embodiment.

[0026] Figure 6As shown, the wear identification piece 6 includes a concave measuring plate 61 fixedly connected to the detection tank and an annular liquid reservoir 63 fixedly connected to the edge of the detection tank. A bottom bearing cavity 602 is excavated at the bottom of the detection tank. Multiple L-shaped holes 603, corresponding to multiple wear identification pieces 6, are also excavated in the bearing plate 4. The L-shaped holes 603 connect the bottom bearing cavity 602 and the annular liquid reservoir 63. The bottom bearing cavity 602 is filled with test fluid. A sealing ring is also snapped onto the upper end of the concave measuring plate 61. The sealing ring includes components that are completely corresponding to and snapped onto the upper end of the concave measuring plate 61. In this embodiment, when the pressure testing system is in operation, the sealing ring and the covering film 62 thereon can be directly disassembled, so that the pressure head 531 can directly contact the test fluid, making the shape characterization of the lower surface of the pressure head 531 more accurate and the sensitivity of the wear detection of the pressure head 531 higher. At the same time, when there is no need to test the pressure head 531, the sealing ring and the covering film 62 thereon can be snapped onto the concave test plate 61 to protect the test fluid inside from contamination by the external environment.

[0027] The test solution is a uniform mixture of electrorheological fluid and colored liquid in a volume ratio of 3-10:1. The color of the inner bottom wall of the concave test plate 61 is complementary to the color of the colored liquid. When the wear of the lower end of the pressure head 531 is tested, the test solution remaining at the wear point and the bottom of the concave test plate 61 will show a clear color difference after solidification. This makes the image obtained by the high-definition camera more contrasting and improves the identification effect of the wear condition of the pressure head 531.

[0028] The bottom edge of the concave measuring plate 61 is chiseled with an annular groove 601, and the bottom of the annular groove 601 is chiseled with multiple evenly distributed through holes, which connect the annular groove 601 and the bottom bearing cavity 602. The liquid level of the test liquid is higher than the upper edge of the annular groove 601, such as... Figures 7-9In the diagram, b represents the solidified test liquid, and c represents the solidified layer of the retained test liquid. During testing, the pressure head 531 is embedded into the concave measuring plate 61, thereby squeezing the electrorheological fluid and causing it to move down along the annular groove and annular side groove 601 into the bottom bearing cavity 602. Finally, it enters the annular liquid storage tank 63 through the L-shaped hole 603 for storage until the pressure head 531 contacts the bottom of the concave measuring plate 61. During this process, if there is wear on the edge of the pressure head 531, there will be a certain gap between its edge and the inner wall of the concave measuring plate 61. Due to the fluidity of the test liquid, this will cause the concave plate to... Some test fluid is retained in the gap between the worn edges of the pressure head 531 at the bottom of the test plate 61. Then, the test fluid is energized, and the electrorheological fluid is energized to solidify and shape it. After that, the pressure head is controlled to rise, and the retained and shaped test fluid will be clearly visible at the bottom of the concave test plate 61. The image information of the bottom of the concave test plate 61 can be obtained through a high-definition camera. The wear condition of the pressure head 531 can be judged based on whether there is an obvious solidified test fluid layer at the bottom of the concave test plate 61. The larger the distribution range and the thicker the solidified test fluid at the bottom of the concave test plate 61, the more serious the wear.

[0029] It is worth noting that the covering film 62 can also be directly fixed and wrapped around the upper end of the concave measuring plate 61. When performing wear detection on the edge of the pressure head 531, it can be directly approached from below the bottom of the concave measuring plate 61 through the covering film 62, so that the electrorheological fluid adheres to the bottom of the connecting rod 532 through the covering film 62. This can also characterize the shape of the lower surface of the pressure head 531. However, due to the presence of the covering film 62, the sensitivity of the pressure head 531 wear detection will be lower than that of the pressure head 531 directly contacting the test fluid. However, in this method, the electrorheological fluid is in a closed space, which is not easy to lose due to detection, and it is also not easy to be contaminated. Both settings have their advantages. In specific implementation, the setting of the covering film 62 can be chosen from the two methods mentioned above. The covering film 62 is made of an elastic, insulating, transparent material, and the concave measuring plate 61 has an open design at the opening. This design makes it less likely that the covering film 62 and the edge of the concave measuring plate 61 will form a right angle when the end of the pressure head 531 enters the interior of the concave measuring plate 61, thus preventing excessive stress at the contact point and protecting the covering film 62 from damage.

[0030] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A pressure testing system for automotive parts, comprising a testing equipment body (1), wherein an electric cylinder (2) is fixedly mounted on the top of the testing equipment body (1), and the extended end of the electric cylinder (2) movably penetrates the top of the testing equipment body (1) and is fixedly connected to a multi-station testing assembly, characterized in that: The test equipment body (1) is fixedly connected to a sloping mounting plate (11) at the top. Multiple evenly distributed display screens (12) are installed at the front end of the sloping mounting plate (11). A bearing plate (4) is provided at the bottom of the test equipment body (1). Multiple evenly distributed pressure test grooves (401) are chiseled at the upper end of the bearing plate (4). The multi-station test assembly includes a main pressure plate (31), a central pressure plate (32) fixedly connected to the middle of the lower end of the main pressure plate (31), and multiple pressure testing assemblies (5) respectively connected to the lower end of the central pressure plate (32). Two guide rods (301) are also fixedly connected between the upper and lower inner walls of the test equipment body (1). Both guide rods (301) are movable through the main pressure plate (31). Multiple pressure testing components (5) correspond to multiple pressure test slots (401) respectively. Each pressure testing component (5) includes a bearing column (51), a cover plate (52) fixedly connected to the outer end of the bearing column (51) by bolts, and a pressure actuator fixedly connected between the bearing column (51) and the cover plate (52). The pressure actuator includes a connecting rod (532), a pressure head (531) located below the connecting rod (532), and a pressure sensor (501) connected between the two. Multiple pressure sensors (501) are respectively connected to multiple displays (12) for signal transmission. Electric push rods (41) are fixedly connected to the inner walls of the left and right sides of the test equipment body (1). T-shaped corner plates (42) are fixedly connected to the outer ends of the left and right sides of the bearing plate (4). The extended end of the electric push rod (41) is fixedly connected to the T-shaped corner plate (42), and the T-shaped corner plate (42) faces the front end of the test equipment body (1). Multiple evenly distributed detection grooves are also chiseled on the bearing plate (4). Wear identification pieces (6) are provided in the detection grooves. Multiple wear identification pieces (6) correspond to multiple pressure test grooves (401) respectively. The wear identification pieces (6) are located on the side of the pressure test groove (401) facing the rear of the test equipment body (1). At least two high-definition cameras are fixedly connected to the lower end of the main pressure plate (31). The high-definition cameras are located above the multiple wear identification pieces (6).

2. The pressure testing system for automotive parts according to claim 1, characterized in that: The diameter of the wear identification piece (6) is larger than the diameter of the pressure head (531), and the upper end of the wear identification piece (6) is clamped with a force-induced color-changing layer.

3. The pressure testing system for automotive parts according to claim 1, characterized in that: The wear identification piece (6) includes a concave measuring plate (61) fixedly connected in the detection groove and an annular liquid holding tank (63) fixedly connected at the edge of the detection groove. A bottom bearing cavity (602) is drilled at the bottom of the detection groove. A plurality of L-shaped holes (603) corresponding to the plurality of wear identification pieces (6) are also drilled in the bearing plate (4). The L-shaped holes (603) connect the bottom bearing cavity (602) and the annular liquid holding tank (63). The bottom bearing cavity (602) is filled with test liquid.

4. The pressure testing system for automotive parts according to claim 3, characterized in that: The test solution is a uniform mixture of electrorheological fluid and colored liquid in a volume ratio of 3-10:

1. The color of the inner bottom wall of the concave test plate (61) is complementary to the color of the colored liquid.

5. The pressure testing system for automotive parts according to claim 3, characterized in that: The upper end of the concave measuring plate (61) is also fitted with a sealing ring, which includes a ring body that is completely fitted with the upper end of the concave measuring plate (61) and a covering film (62) that is fixedly embedded in the inner wall of the ring body.

6. The pressure testing system for automotive parts according to claim 4, characterized in that: The covering film (62) is made of an elastic, insulating, transparent material, and the concave measuring plate (61) has an open-mouth design.

7. The pressure testing system for automotive parts according to claim 5, characterized in that: The concave measuring plate (61) has an annular groove (601) carved at the bottom edge. The bottom of the annular groove (601) has multiple evenly distributed through holes. The through holes connect the annular groove (601) and the bottom bearing cavity (602). The liquid level of the test liquid is higher than the upper edge of the annular groove (601).

8. The pressure testing system for automotive parts according to claim 6, characterized in that: The stress testing method includes the following steps: S1. When in use, first drive the bearing plate (4) towards the front end of the test equipment body (1) by the electric push rod (41), so that multiple pressure test slots (401) move forward, and at the same time, make multiple wear identification pieces (6) just below multiple pressure test components (5); S2. Then, remove the tested automotive parts from the multiple pressure test chambers (401) and place new parts to be tested. At the same time, drive multiple pressure test components (5) to extend and squeeze the wear identification piece (6) synchronously through the electric cylinder (2). S3. Control the pressure testing component (5) to rise, and then drive the bearing plate (4) to move in the opposite direction through the electric push rod (41) until multiple accessories are located directly below the pressure testing component (5), while multiple wear identification pieces (6) are located below the high-definition camera. The high-definition camera acquires the color marks generated by the multiple wear identification pieces (6) due to the force, and judges the wear condition of the pressure testing component (5) based on the color marks. S4. If no obvious wear is found, the electric cylinder (2) directly drives multiple pressure testing components (5) to move down and exert pressure on the parts. If obvious wear is found, the test work is stopped and the pressure testing components (5) are specifically maintained before the pressure test on the automotive parts is continued.

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