Air tightness testing device and air tightness testing method

Abstract

The present disclosure discloses a kind of air tightness detection device and air tightness detection method.The device includes: support frame, for placing the workpiece to be detected;Clamping assembly, for clamping the workpiece to be detected;Air tightness detection module, including pressure control unit, pressure control unit is sealed with the cavity to be detected of workpiece to be detected Connection, and pressure data can be collected;Data processing module, electrically connected with air tightness detection module, to judge according to the pressure data collected, generate qualified signal or unqualified signal;Transfer assembly, with clamping assembly driving connection, with data processing module electrically connected, to be used for according to qualified signal the workpiece to be detected is moved to first position, or according to unqualified signal the workpiece to be detected is moved to second position.The present disclosure also provides a kind of air tightness detection method.The present disclosure can quickly screen leakage by stage vacuumizing and automatic comparison judgment, improve detection accuracy, improve efficiency and reliability, cooperate with automated sorting.

Description

Technical Field

[0001] This disclosure generally relates to the field of testing equipment technology. More specifically, this disclosure relates to an airtightness testing device and an airtightness testing method. Background Technology

[0002] Couplings are core components in mechanical transmission systems used to connect two shafts, and their sealing performance directly affects the operational stability of the equipment. Existing airtightness testing devices typically use a single negative pressure value to create a vacuum and then maintain pressure, lacking a staged testing structure and automated sorting function. This results in insufficient testing accuracy, low efficiency, and difficulty in meeting the needs of batch testing.

[0003] In view of this, there is an urgent need to provide an airtightness testing device and an airtightness testing method in order to improve the accuracy and automation of testing and increase the efficiency of batch testing. Summary of the Invention

[0004] In order to at least solve one or more of the technical problems mentioned above, this disclosure proposes an airtightness testing device and an airtightness testing method in several aspects.

[0005] In a first aspect, this disclosure provides an airtightness testing device, comprising: a support frame for placing a workpiece to be tested; a clamping assembly for clamping the workpiece to be tested; an airtightness testing module including a pressure control unit, the pressure control unit being sealed to the test cavity of the workpiece to be tested and capable of acquiring pressure data; a data processing module electrically connected to the airtightness testing module for judging based on the acquired pressure data and generating a pass signal or a fail signal; and a transfer assembly drivenly connected to the clamping assembly and electrically connected to the data processing module for transferring the workpiece to be tested to a first position based on the pass signal, or transferring the workpiece to be tested to a second position based on the fail signal.

[0006] In some embodiments, the clamping assembly includes a rotating plate, a third motor, a bidirectional threaded rod, a first clamp, and a second clamp. The body of the third motor is fixedly connected to the rotating plate, and the output end of the third motor is drivenly connected to the bidirectional threaded rod. The first clamp and the second clamp are respectively threadedly connected to the threaded sections of the bidirectional threaded rod in opposite directions.

[0007] In some embodiments, the clamping assembly includes a first clamp and a second clamp arranged in two layers at intervals. The clamping assembly also includes a plurality of third sliders. The first clamps in the two layers are connected to each other by means of a third slider, and the second clamps in the two layers are connected to each other by means of a third slider.

[0008] In some embodiments, the transfer assembly includes a lifting assembly and a moving assembly, the lifting assembly and the moving assembly being connected by a drive to move the workpiece to be inspected in both vertical and horizontal directions.

[0009] In some embodiments, the lifting assembly includes a first motor, a first threaded rod, and a first slider, wherein the output end of the first motor is fixedly connected to the first threaded rod, and the first slider is threadedly connected to the first threaded rod.

[0010] In some embodiments, the moving component includes a limiting plate, a second motor, a sliding plate, and an L-shaped slider. The main body of the second motor is fixedly connected to the limiting plate, the output end of the second motor is fixedly connected to the sliding plate, the sliding plate is fixedly connected to the L-shaped slider, and the L-shaped slider is hingedly connected to the clamping component.

[0011] In some embodiments, the transfer assembly further includes a flipping assembly, which is drive-connected to the clamping assembly for flipping the workpiece to be inspected by a preset angle based on a non-compliance signal.

[0012] In some embodiments, the flipping assembly includes a gear and a rack, the gear being fixedly connected to the clamping assembly, and the rack being fixedly connected to the inner wall of the limiting plate, wherein the rack and the gear can be engaged or disengaged by a moving assembly.

[0013] In some embodiments, a touch screen is also included, which is fixedly connected to the outer wall of the support frame, and a red indicator light and a green indicator light are fixedly connected to the outer wall of the touch screen.

[0014] In some embodiments, a control mounting base is also included, which is fixedly connected to the outer wall of the support frame, and the outer wall of the control mounting base is provided with a start button and an emergency stop button.

[0015] In a second aspect, this disclosure provides an airtightness testing method, comprising the following steps: Step S1: clamping and fixing the workpiece to be tested; Step S2: performing staged vacuuming and pressure holding operations on the workpiece to be tested, and collecting pressure data during the pressure holding process; Step S3: determining whether the airtightness is qualified based on the collected pressure data, if qualified, transferring the workpiece to be tested to a first position, if unqualified, transferring the workpiece to be tested to a second position.

[0016] By using the airtightness testing device and method provided above, this embodiment automatically fixes the workpiece to be tested by setting a clamping component, collects pressure data by vacuuming in stages by the airtightness testing module, automatically compares and generates signals by the data processing module, and then automatically sorts the workpieces to different positions by the transfer component according to the signals. This enables continuous automated operation of testing and sorting, improving testing accuracy and batch testing efficiency. Attached Figure Description

[0017] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0018] Figure 1 An exemplary perspective view of an airtightness detection device according to some embodiments of this disclosure is shown; Figure 2 An exemplary perspective view of an airtightness detection device according to some embodiments of this disclosure is shown; Figure 3 An exemplary perspective view of the support frame and lifting assembly of an airtightness testing device according to some embodiments of this disclosure is shown; Figure 4 An exemplary perspective view of the transfer assembly of an airtightness detection device according to some embodiments of this disclosure is shown; Figure 5 An exemplary perspective view of the transfer assembly of an airtightness detection device according to some embodiments of this disclosure is shown; Figure 6 An exemplary perspective view of the transfer assembly of an airtightness detection device according to some embodiments of this disclosure is shown; Figure 7 An exemplary perspective view of the transfer assembly of an airtightness detection device according to some embodiments of this disclosure is shown; Figure 8 An exemplary perspective view of an airtightness detection device according to some embodiments of this disclosure is shown. Detailed Implementation

[0019] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0020] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0021] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, 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 term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0022] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0023] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0024] This disclosure provides an airtightness testing device and method. The device automatically fixes the workpiece to be tested by setting a clamping component, collects pressure data by evacuating in stages by an airtightness testing module, automatically compares and generates signals by a data processing module, and then automatically sorts the workpieces to different positions according to the signals by a transfer component. This enables continuous automated operation of testing and sorting, improving testing accuracy and batch testing efficiency.

[0025] See Figure 1 and Figure 2 , Figure 1 An exemplary perspective view of an airtightness detection device according to some embodiments of this disclosure is shown. Figure 2 An exemplary perspective view of an airtightness detection device according to some embodiments of this disclosure is shown.

[0026] Some embodiments disclosed herein provide an airtightness testing device, including a support frame 2, a clamping assembly 15, an airtightness testing module, a data processing module, and a transfer assembly. The support frame 2 is used to place the workpiece 4 to be tested, and the clamping assembly 15 is used to clamp the workpiece 4. The airtightness testing module includes a pressure control unit, which is sealed to the test cavity of the workpiece 4 and capable of acquiring pressure data. The data processing module is electrically connected to the airtightness testing module to make a judgment based on the acquired pressure data and generate a pass signal or a fail signal. The transfer assembly is drivenly connected to the clamping assembly 15 and electrically connected to the data processing module to transfer the workpiece 4 to a first position based on the pass signal, or to a second position based on the fail signal.

[0027] The support frame 2 is the main structural component for supporting various parts and includes a worktable 3 for placing the workpiece 4 to be inspected. The clamping assembly 15 includes grippers and other structures for clamping the workpiece 4 to be inspected, enabling it to grasp and release the workpiece 4 before and after inspection. The pressure control unit of the airtightness detection module includes a pressure regulating device such as an air pump and a pressure detection device such as a pressure sensor. The pressure control unit is directly connected to the chamber to be inspected, thereby applying varying pressure to its interior and acquiring real-time pressure values. The data processing module may include logic control components such as a PLC, which, in response to the pressure value signal transmitted by the pressure control unit, compares it with a pre-stored reference value and outputs different electrical signals based on the comparison result. The transfer assembly may include at least one drive mechanism to move the clamping assembly 15. In response to the electrical signals transmitted by the data processing module, the clamping assembly 15 is driven to move in a corresponding motion manner, thereby sending the inspected workpiece 4 to the qualified or unqualified product area, achieving automatic classification after inspection.

[0028] Further or alternatively, see Figures 4 to 7 , Figure 4 An exemplary perspective view of the transfer assembly of an airtightness detection device according to some embodiments of this disclosure is shown. Figure 5 An exemplary perspective view of the transfer assembly of an airtightness detection device according to some embodiments of this disclosure is shown. Figure 6 An exemplary perspective view of the transfer assembly of an airtightness detection device according to some embodiments of this disclosure is shown. Figure 7 An exemplary perspective view of the transfer assembly of an airtightness testing device according to some embodiments of this disclosure is shown, wherein some material has been removed to clearly show the internal structure.

[0029] The clamping assembly 15 includes a rotating plate 1501, a third motor 1502, a bidirectional threaded rod 1503, a first clamp 1504, and a second clamp 1506. The main body of the third motor 1502 is fixedly connected to the rotating plate 1501, and the output end of the third motor 1502 is drivenly connected to the bidirectional threaded rod 1503. The first clamp 1504 and the second clamp 1506 are respectively threaded onto the opposite threaded sections of the bidirectional threaded rod 1503. The rotating plate 1501 is the main structural component for supporting the clamping assembly 15, and it is fixedly connected to the base of the clamping assembly 15 by means of bolts or other methods. The main body of the third motor 1502 can be fixedly connected to the rotating plate 1501 by bolts, and the bidirectional threaded rod 1503 can be drivenly connected to the output end of the third motor 1502 by means of a coupling. One positioning side of the first clamp 1504 and the second clamp 1506 is close to and parallel to the surface of the rotating plate 1501 to prevent them from rotating relative to the rotating plate 1501. After the third motor 1502 starts, its output end drives the bidirectional threaded rod 1503 to rotate. Since the bidirectional threaded rod 1503 has two sections of threads in opposite directions, the first clamp 1504 and the second clamp 1506 will move closer to each other or further away from each other along the inner wall of the rotating plate 1501. When the two clamps move closer to each other, they can clamp the workpiece 4 to be tested from both sides, so that the workpiece 4 to be tested will not shake during subsequent movement and testing, avoiding leakage at the testing interface due to positional displacement, and ensuring the accuracy of the testing results.

[0030] Furthermore, in some embodiments, the airtightness testing device further includes a first clamp 1504 and a second clamp 1506 arranged in two layers at intervals. The clamping assembly 15 also includes a plurality of third sliders 1505. The first clamps 1504 in the two layers are connected to each other by a third slider 1505, and the second clamps 1506 in the two layers are connected to each other by a third slider 1505. Corresponding to the first clamps 1504 and the second clamps 1506 arranged in two layers, the worktable 3 of the support frame 2 can also be arranged in two layers, upper and lower. The first clamps 1504 and the second clamps 1506 arranged in two layers can simultaneously contact the workpieces 4 to be tested arranged in the two layers from both upper and lower positions, increasing the number of workpieces 4 to be tested that can be gripped at one time. The third slider 1505 connects the corresponding clamps in the upper and lower layers into one unit. When the bidirectional threaded rod 1503 drives the first clamp 1504 to move, the first clamps 1504 in the upper and lower layers move synchronously through the third slider 1505. Similarly, the second clamps 1506 in the upper and lower layers also move synchronously. This applies a uniform clamping force to multiple workpieces 4 to be tested during clamping, so that the workpieces 4 to be tested maintain a stable posture when they are flipped or moved, reducing the probability of workpieces tilting or falling off due to uneven distribution of clamping force.

[0031] In this embodiment, the transfer assembly includes a lifting assembly 12 and a moving assembly 13. The lifting assembly 12 and the moving assembly 13 are connected by a transmission to move the workpiece 4 to be inspected in both vertical and horizontal directions. Both the lifting assembly 12 and the moving assembly 13 include a motor screw module and other motion drive devices, which are sequentially connected by a transmission. The clamping assembly 15 is installed on the moving part of the transfer assembly. Thus, the transfer assembly can lift or lower the workpiece 4 to be inspected, allowing it to leave or be placed on the worktable 3 of the support frame 2. The moving assembly 13 is responsible for moving the workpiece 4 to be inspected in the horizontal plane, enabling it to be transferred between the inspection station, the qualified product storage area, and the unqualified product storage area. The lifting assembly 12 and the moving assembly 13 work together to achieve automatic transport of the workpiece 4 to be inspected, replacing manual handling and positioning, and significantly improving production efficiency.

[0032] Further or optionally, the lifting assembly 12 includes a first motor 1201, a first threaded rod 1202, and a first slider 1203. The output end of the first motor 1201 is fixedly connected to the first threaded rod 1202, and the first slider 1203 is threadedly connected to the first threaded rod 1202. Specifically, after the first motor 1201 starts, it drives the first threaded rod 1202 to rotate. During the rotation, the first threaded rod 1202 pushes the first slider 1203 to move along the axis of the first threaded rod 1202. The first slider 1203 is fixedly connected to the base portion of the transfer assembly. Thus, the rotation of the first motor 1201 can be converted into vertical linear motion, allowing the workpiece 4 to be inspected to rise smoothly and automatically to a specified height or descend to the working position, improving inspection stability and production efficiency.

[0033] In addition, the moving component 13 includes a limiting plate 1301, a second motor 1302, a sliding plate 1303, and an L-shaped slider 1304. The main body of the second motor 1302 is fixedly connected to the limiting plate 1301, and the output end of the second motor 1302 is fixedly connected to the sliding plate 1303. The sliding plate 1303 is fixedly connected to the L-shaped slider 1304, and the L-shaped slider 1304 is hingedly connected to the clamping component 15. The limiting plate 1301 is generally hollow and rectangular, serving as a structural component for mounting the second motor 1302 and being fixedly connected to the first slider 1203 of the transfer component. The sliding plate 1303 is generally elongated and is located inside the limiting plate 1301. One end of each of the two L-shaped sliders 1304 is fixedly attached to both ends of the sliding plate 1303, and the other end is hingedly connected to the clamping component 15. Furthermore, the limiting plate 1301 can slidably limit the movement of the sliding plate 1303 by engaging with the sliding plate 1303, thus restricting the direction of movement of the sliding plate 1303. This allows the second motor 1302 to drive the sliding plate 1303 to slide along the inner wall of the limiting plate 1301 after startup. The sliding plate 1303 then drives the L-shaped slider 1304 to move synchronously, which in turn drives the clamping assembly 15, which is hinged to it, to move synchronously, thereby allowing the workpiece 4 to be inspected to reach different working positions in the horizontal direction. The hinged connection between the L-shaped slider 1304 and the clamping assembly 15 allows the clamping assembly 15 to rotate within a certain angle range.

[0034] See also Figure 4 , Figure 5 and Figure 8 , Figure 8 An exemplary perspective view of an airtightness testing apparatus according to some embodiments of this disclosure is shown. Further or optionally, the transfer assembly further includes a flipping assembly 14, which is kinetically connected to the clamping assembly 15 for flipping the workpiece 4 to be tested 4 by a preset angle based on a non-compliance signal. Thus, when the data processing module issues a non-compliance signal, the flipping assembly 14 is activated and drives the clamping assembly 15 to rotate around a set axis, causing the clamped workpiece 4 to be flipped to a preset tilt angle or inverted state. This allows the non-compliance workpiece 4 to be delivered to a second position in a specific posture, facilitating subsequent marking or centralized processing of non-compliance items, and also preventing confusion between qualified and non-compliance items on the transfer path.

[0035] In some embodiments, the flipping assembly 14 may include a gear 1401 and a rack 1402. The gear 1401 is fixedly connected to the clamping assembly 15, and the rack 1402 is fixedly connected to the inner wall of the limiting plate 1301. The rack 1402 and the gear 1401 can be driven by the moving assembly 13 to engage or disengage. Specifically, the gear 1401 is fixed to the clamping assembly 15 and moves horizontally with the clamping assembly 15. For example, two gears 1401 may be fixedly disposed on both sides of the rotating plate 1501. When the L-shaped slider 1304 of the moving assembly 13 pushes the clamping assembly 15 toward the direction of the rack 1402, the gear 1401 and the rack 1402 enter an engaged state. At this time, the continued horizontal movement of the clamping assembly 15 forces the gear 1401 to roll along the rack 1402, thereby driving the rotating plate 1501 of the clamping assembly 15 to rotate itself. When the moving component 13 pushes the clamping component 15 back in the opposite direction, the rotating plate 1501 flips back to its original orientation. Furthermore, the gear 1401 disengages from the rack 1402, and the clamping component 15 stops rotating, transitioning to linear movement and returning to its original position. During the engagement phase, the flipping angle of the clamping component 15 can be precisely controlled by controlling the movement distance of the moving component 13. Additionally, an L-shaped fixing plate 1403 can be fixedly installed on the support frame 2. This L-shaped fixing plate 1403 forms an anti-rotation and sliding limit with the rotating plate 1501 when the gear 1401 and rack 1402 disengage. For example, two L-shaped fixing plates 1403 can be fixedly installed on the underside of the worktable 3, with their extended surfaces used to contact and slide relative to the bottom surface of the rotating plate 1501. This allows the rotating plate 1501 to form an anti-rotation engagement when it moves close to the worktable 3, maintaining a stable orientation and posture during operation.

[0036] In addition, see Figure 3 , Figure 3An exemplary perspective view of the support frame and lifting assembly of the airtightness testing device according to some embodiments of this disclosure is shown. In some embodiments, a touch screen 5 is also included, which is fixedly connected to the outer wall of the support frame 2. A red indicator light 6 and a green indicator light 7 are fixedly connected to the outer wall of the touch screen 5. The touch screen 5 is mounted on the outer surface of the support frame 2. Operators can input testing parameters or view the testing status by touching the touch screen 5. The red indicator light 6 and the green indicator light 7 are fixed to the panel of the touch screen 5. When the test result is qualified, the green indicator light 7 lights up; when the test result is unqualified, the red indicator light 6 lights up. This allows operators to quickly judge the test results from a distance without looking at the screen, improving the operational efficiency during batch testing. In addition, a control mounting base 9 is included, which is fixedly connected to the outer wall of the support frame 2. A start button 10 and an emergency stop button 11 are provided on the outer wall of the control mounting base 9. The control mounting base 9 is fixed on the support frame 2 in a position that is easily accessible to the operator. When the start button 10 is pressed, it sends a command to start working to the entire device, so that each module starts the detection process in a predetermined order. When the emergency stop button 11 is pressed in an emergency, it immediately cuts off the power supply to the device, so that all moving parts stop quickly and prevents equipment damage or personal injury in case of abnormal conditions.

[0037] In summary, this disclosed embodiment utilizes a phased vacuuming and pressure data collection module for airtightness detection, along with an automatic comparison and signal generation module for data processing. Combined with a transfer component that automatically sorts qualified and unqualified products, this approach enables rapid leak screening, improves detection accuracy, and achieves automated sorting, thereby enhancing efficiency and reliability. The simultaneous clamping of the first and second clamps, driven by a bidirectional threaded rod, ensures the stability of the workpiece during testing and movement, preventing workpiece movement that could lead to incomplete sealing of the testing interface and air leakage, thus improving the accuracy of airtightness test results. The coordinated use of the lifting and moving components enables automated transport of the workpiece, replacing manual handling and positioning, significantly improving production efficiency.

[0038] Some embodiments disclosed herein also provide an airtightness testing method, including the following steps: Step S1: clamping and fixing the workpiece 4 to be tested; Step S2: performing staged vacuuming and pressure holding operations on the workpiece 4 to be tested, and collecting pressure data during the pressure holding process; Step S3: determining whether the airtightness is qualified based on the collected pressure data. If qualified, the workpiece 4 to be tested is transferred to the first position; if unqualified, the workpiece 4 to be tested is transferred to the second position.

[0039] In step S1, the clamping component applies clamping force from the outside of the workpiece 4 to be inspected, fixing its position. In step S2, the vacuum device first evacuates the workpiece 4 to a first pressure value and maintains it for a period of time, calculating the pressure drop rate. If the drop rate is within the allowable range, it continues to evacuate to a second pressure value and maintains the pressure again, recording the pressure value. In step S3, the recorded pressure value is compared with a preset acceptable range. Based on the comparison result, the transfer component is driven to send the workpiece 4 to the acceptable product storage area or the reject area. Throughout the entire inspection process, no manual data reading or manual sorting is required, achieving continuous automated operation of inspection and sorting.

[0040] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. An airtightness testing device, characterized in that, include: Support frame (2), which is used to place the workpiece to be inspected (4); Clamping assembly (15) for clamping the workpiece to be inspected (4); An airtightness testing module includes a pressure control unit, which is sealed to the test cavity of the workpiece (4) and is capable of collecting pressure data. A data processing module, which is electrically connected to the airtightness detection module, is used to make judgments based on the collected pressure data and generate a qualified or unqualified signal. The transfer component is drivenly connected to the clamping component (15) and electrically connected to the data processing module for transferring the workpiece to be tested (4) to a first position according to the qualified signal, or transferring the workpiece to be tested (4) to a second position according to the unqualified signal.

2. The airtightness testing device according to claim 1, characterized in that, The clamping assembly (15) includes a rotating plate (1501), a third motor (1502), a bidirectional threaded rod (1503), a first clamp (1504), and a second clamp (1506). The main body of the third motor (1502) is fixedly connected to the rotating plate (1501), and the output end of the third motor (1502) is connected to the bidirectional threaded rod (1503) for transmission. The first clamp (1504) and the second clamp (1506) are respectively threaded to the threaded sections of the bidirectional threaded rod (1503) in opposite directions.

3. The airtightness testing device according to claim 2, characterized in that, The clamping assembly (15) includes a first clamp (1504) and a second clamp (1506) arranged in two layers at intervals. The clamping assembly (15) also includes a plurality of third sliders (1505). The first clamps (1504) in the two layers are connected to each other by a third slider (1505), and the second clamps (1506) in the two layers are connected to each other by a third slider (1505).

4. The airtightness testing device according to claim 1, characterized in that, The transfer assembly includes a lifting assembly (12) and a moving assembly (13). The lifting assembly (12) and the moving assembly (13) are connected in a transmission connection to drive the workpiece (4) to be inspected to move in the vertical and horizontal directions.

5. The airtightness testing device according to claim 4, characterized in that, The lifting assembly (12) includes a first motor (1201), a first threaded rod (1202) and a first slider (1203). The output end of the first motor (1201) is fixedly connected to the first threaded rod (1202), and the first slider (1203) is threadedly connected to the first threaded rod (1202).

6. The airtightness testing device according to claim 4, characterized in that, The moving component (13) includes a limiting plate (1301), a second motor (1302), a sliding plate (1303), and an L-shaped slider (1304). The main body of the second motor (1302) is fixedly connected to the limiting plate (1301), the output end of the second motor (1302) is fixedly connected to the sliding plate (1303), the sliding plate (1303) is fixedly connected to the L-shaped slider (1304), and the L-shaped slider (1304) is hingedly connected to the clamping component (15).

7. The airtightness testing device according to claim 4, characterized in that, The transfer assembly further includes a flipping assembly (14), which is connected to the clamping assembly (15) for flipping the workpiece (4) to be inspected by a preset angle according to the non-conforming signal.

8. The airtightness testing device according to claim 7, characterized in that, The flipping assembly (14) includes a gear (1401) and a rack (1402). The gear (1401) is fixedly connected to the clamping assembly (15), and the rack (1402) is fixedly connected to the inner wall of the limiting plate (1301). The rack (1402) and the gear (1401) can be driven by the moving assembly (13) to engage or disengage.

9. The airtightness testing device according to claim 1, characterized in that, It also includes a touch screen (5), which is fixedly connected to the outer wall of the support frame (2), and a red indicator light (6) and a green indicator light (7) are fixedly connected to the outer wall of the touch screen (5).

10. The airtightness testing device according to claim 9, characterized in that, It also includes a control mounting base (9), which is fixedly connected to the outer wall of the support frame (2). The outer wall of the control mounting base (9) is provided with a start button (10) and an emergency stop button (11).

11. A method for detecting airtightness, characterized in that, Includes the following steps: Step S1: Clamp and fix the workpiece (4) to be inspected; Step S2: Perform staged vacuuming and pressure holding operations on the workpiece (4) to be tested, and collect pressure data during the pressure holding process; Step S3: Determine whether the air tightness is qualified based on the collected pressure data. If qualified, move the workpiece (4) to be tested to the first position. If unqualified, move the workpiece (4) to the second position.

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