An automatic air tightness detection device for workpieces

Abstract

This application discloses an automated airtightness testing device for workpieces, including a frame, a feeding and conveying mechanism, a rotary feeding mechanism, and a testing actuator. The frame is equipped with a worktable. The rotary feeding mechanism includes a rotary feeding plate and a rotary drive assembly. The rotary feeding plate is located above the worktable, and its center is rotatably connected to the worktable via a spindle. Multiple receiving notches are formed at equal angles along the peripheral edges of the rotary feeding plate to receive workpieces. The worktable is equipped with an arc-shaped stop bar, the concave side of which is adapted to the outer contour of the rotary feeding plate. The worktable is equipped with a carrier located on the concave side of the arc-shaped stop bar. The rotary feeding plate is used to intermittently move workpieces above the carrier. The frame is equipped with a lifting drive assembly, and the testing actuator is connected to the frame via the lifting drive assembly. This automated airtightness testing device for workpieces improves the efficiency of workpiece airtightness testing.

Description

Technical Field

[0001] This application relates to the field of airtightness testing technology, and in particular to an automated airtightness testing device for workpieces. Background Technology

[0002] In modern industrial manufacturing, equipment involves a large number and variety of workpieces. To ensure the functionality of the equipment, it is necessary to conduct quality inspections on the different workpieces that make up the equipment, ensuring that each workpiece meets quality requirements. Among these inspections, airtightness testing is an important indicator. By conducting airtightness testing on the workpieces, the intrusion of water or dust can be prevented, thus meeting stringent IP protection level requirements.

[0003] Currently, when testing the airtightness of workpieces, it is necessary to manually place the workpiece into the testing equipment and then turn on the equipment for testing. This results in low efficiency in testing the airtightness of workpieces, which affects production efficiency. Summary of the Invention

[0004] To address the problem of low efficiency in workpiece airtightness testing during equipment manufacturing, this application provides an automated airtightness testing device for workpieces.

[0005] The automated airtightness testing device for workpieces provided in this application adopts the following technical solution:

[0006] An automated airtightness testing device for workpieces includes a frame, a feeding and conveying mechanism, a rotary feeding mechanism, and a testing actuator. The frame has a worktable with a discharge port. The feeding and conveying mechanism sequentially feeds workpieces onto the upper surface of the worktable. The rotary feeding mechanism includes a rotary feeding plate and a rotary drive assembly. The rotary feeding plate is located above the worktable and is circular. The center of the rotary feeding plate is rotatably connected to the worktable via a spindle. Multiple receiving notches are formed at equal angles along the peripheral edges of the rotary feeding plate. The receiving notch is used to receive the workpieces conveyed to the worktable by the feeding conveyor mechanism. The worktable is provided with an arc-shaped stop bar, the concave side of which is adapted to the outer contour of the rotary feeder plate. The worktable is provided with a carrier, which is located between the feeding conveyor mechanism and the unloading port. The worktable is provided with a mounting groove for mounting the carrier, which is located on the concave side of the arc-shaped stop bar. The rotary feeder plate is used to intermittently move the workpieces above the carrier. The frame is provided with a lifting drive, and the detection actuator is connected to the frame through the lifting drive.

[0007] By adopting the above technical solution, when performing airtightness testing on workpieces, the feeding and conveying mechanism successively transports the workpieces to the worktable, positioning them within the receiving notch of the rotating feeder. The rotating feeder then rotates and moves the workpiece from the receiving notch to the top of the carrier. During this rotation, the arc-shaped baffle provides auxiliary limiting and guiding for the workpiece. Next, the lifting drive moves the testing actuator downwards to perform airtightness testing on the workpiece on the carrier. After testing, the lifting drive moves the testing actuator upwards to reset, and then the rotating feeder continues its operation, transferring the tested workpiece to the unloading port. In this process, the workpiece loading, airtightness testing, and unloading steps are all automated, eliminating the need for manual loading and unloading, thus automating the airtightness testing process and significantly improving testing efficiency.

[0008] Optionally, the rotary drive assembly includes a motor and a Geneva mechanism, wherein the motor drives the rotary feeder to rotate via the Geneva mechanism.

[0009] By adopting the above technical solution, the motor drives the rotating feed plate to rotate through the grooved wheel mechanism, so that the continuous rotation of the motor is converted into the unidirectional periodic rotation of the rotating feed plate with pauses, so that the testing actuator can perform a sealing test on the workpiece in the paused state of the rotating feed plate.

[0010] Optionally, the automated airtightness testing device further includes a discharge conveying mechanism and a collection trough. The collection trough and the discharge conveying mechanism are arranged side by side in the horizontal direction and are both located below the worktable. The frame is provided with a guide plate, which is located below the discharge port and above the input end of the discharge conveying mechanism. The guide plate is rotatably connected to the frame via a rotating shaft. The axis of the rotating shaft is in the horizontal direction, and a clearance is left between the rotating shaft and the upper edge of the guide plate. The frame is provided with a swing drive for driving the guide plate to swing back and forth around the rotating shaft. The guide plate is used to guide the workpiece to the discharge conveying mechanism or the collection trough.

[0011] By adopting the above technical solution, the swing drive drives the guide plate to swing back and forth around the rotating shaft. The rotating shaft is set at the middle position of the guide plate along the height direction, so that the upper part of the guide plate and the discharge port maintain a certain height distance, allowing the workpiece to fall from the discharge port onto the guide plate. When different surfaces of the guide plate face upward, the guide plate can guide the workpiece in different directions, so that the guide plate can guide the workpiece to the discharge conveying mechanism or the collection tank, so that qualified workpieces and unqualified workpieces are separated after inspection. The discharge conveying mechanism can continuously output qualified workpieces.

[0012] Optionally, the axial direction of the rotating shaft is perpendicular to the length direction of the discharge conveying mechanism.

[0013] By adopting the above technical solution, after detection, the direction of the workpiece sliding along the guide plate is perpendicular to the axis of the rotating shaft. By making the conveying direction of the discharge conveying mechanism perpendicular to the axis of the rotating shaft, the speed direction of the workpiece after sliding from the guide plate to the discharge conveying mechanism is parallel to the length direction of the discharge conveying mechanism, making it difficult for the workpiece to fall outward from both sides of the discharge conveying mechanism.

[0014] Optionally, the side wall of the collection trough away from the discharge conveying mechanism serves as a guide wall, which gradually slopes downwards towards the discharge conveying mechanism; the guide wall is used to receive workpieces that slide down from the guide plate.

[0015] By adopting the above technical solution, the guide wall can support the workpiece sliding from the guide plate into the collection tank, and the guide wall can reduce the impact force of the workpiece falling from the guide plate.

[0016] Optionally, a set of baffles is provided on each of the two opposite sides of the guide plate, with two baffles in each set. The baffles are perpendicular to the rotating shaft, and a slide is formed between the two baffles in the same set and the guide plate.

[0017] By adopting the above technical solution, a slide is formed between the two baffles in the same group and the guide plate, so that the workpiece slides down along the slide and reduces the situation where the workpiece slides out from both sides of the guide plate.

[0018] Optionally, the upper surface of the rotary feeder plate is provided with multiple positioning components, each of which corresponds to one of the multiple receiving notches. Each positioning component includes two opposing sliding blocks for jointly clamping the workpiece. The two sliding blocks are located on opposite sides of the receiving notch. The lower surface of each sliding block is provided with a guide block. The sides of the receiving notch are provided with guide grooves for the guide blocks to slide, and the extension direction of the guide grooves is perpendicular to the opening direction of the receiving notch. The opposite sides of the two sliding blocks in the same group are provided with first magnets, which have magnetic attraction between them. The worktable is provided with second magnets, which are located near the center of the worktable relative to each receiving notch. The second magnets are located between the feeding conveying mechanism and the main shaft. When the receiving notch rotates to the position of receiving the workpiece, the second magnets generate a repulsive force on the two first magnets, thereby forcing the two sliding blocks to move away from each other.

[0019] By adopting the above technical solution, when the receiving notch rotates to the position of receiving the workpiece, the compression spring pushes the second magnet into the clearance groove, so that the rounded part of the upper part of the second magnet extends into the clearance groove. In this state, the second magnet generates a repulsive force on the two first magnets respectively, so as to force the two sliding blocks to move away from each other, so that the feeding conveying mechanism can easily send the workpiece between the two sliding blocks. When the workpiece rotates away from the second magnet with the receiving notch, the rotating feeding plate gradually squeezes the second magnet back into the telescopic groove. The repulsive force between the second magnet and the first magnet gradually disappears, and the magnetic attraction between the two first magnets forces the two sliding blocks to move closer to each other, so as to form a clamping effect on the workpiece, thereby keeping the position of the workpiece stable.

[0020] Optionally, the mounting groove has a chamfered edge, and the lower edge of the chamfer is lower than the upper surface of the carrier.

[0021] By adopting the above technical solution, after the workpiece inspection is completed, the rotary feeder continues to rotate and transfer the workpiece. The workpiece needs to be moved from the carrier to the worktable. During this process, the chamfer on the edge of the mounting slot can guide the workpiece and reduce the occurrence of workpiece movement jamming.

[0022] Optionally, the spindle is fitted with a planar thrust ball bearing, which is located between the worktable and the rotating feed plate, and is used to support the rotating feed plate.

[0023] By adopting the above technical solution, the planar thrust ball plays a supporting role for the rotating feed plate, which can reduce the frictional resistance during the rotation of the rotating feed plate.

[0024] Optionally, a plurality of polytetrafluoroethylene (PTFE) pads are embedded on the upper surface of the workbench, and the upper surface of the PTFE pads abuts against the rotary feed plate.

[0025] By adopting the above technical solution, the PTFE pad abuts against the rotating feed plate, making it less prone to rubbing against the worktable during the rotation of the rotating feed plate; the PTFE material has a self-lubricating effect, resulting in low frictional resistance between the rotating feed plate and the PTFE pad. In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The workpiece loading, airtightness testing and unloading steps can be carried out automatically, eliminating the need for manual loading and unloading, thus automating the airtightness testing process and greatly improving the efficiency of airtightness testing.

[0027] 2. When different surfaces of the guide plate face upwards, the guide plate can guide the workpiece in different directions, enabling the guide plate to guide the workpiece to the discharge conveying mechanism or collection tank, so that qualified workpieces and unqualified workpieces are separated after inspection. The discharge conveying mechanism can continuously output qualified workpieces. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of this embodiment.

[0029] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0030] Figure 3 This is a cross-sectional view used in this embodiment to illustrate the connection relationship between the rotary feeder and the worktable.

[0031] Figure 4 yes Figure 1 A partial sectional view at position BB in the middle.

[0032] Figure 5 This is a schematic diagram illustrating the installation position of the guide plate in this embodiment.

[0033] Figure 6 This is a schematic diagram illustrating the different working states of the guide plate in this embodiment.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Frame; 2. Feeding and conveying mechanism; 3. Rotary feeding mechanism; 31. Rotary feeding plate; 311. Receiving notch; 312. Main shaft; 313. Guide groove; 314. Clearance groove; 32. Rotary drive assembly; 321. Motor; 322. Geneva wheel mechanism; 4. Detection actuator; 41. Lifting drive assembly; 5. Worktable; 51. Arc-shaped stop bar; 52. Flat thrust ball bearing; 53. Bearing mounting groove; 54. 55. Polytetrafluoroethylene pad; 55. Mounting groove; 551. Chamfer; 56. Discharge port; 57. Telescopic groove; 6. Carrier; 7. Positioning assembly; 71. Sliding block; 72. Guide block; 73. First magnet; 74. Second magnet; 741. Rounded corner; 75. Compression spring; 8. Discharge conveying mechanism; 9. Collection trough; 91. Guide wall; 10. Guide plate; 101. Rotating shaft; 102. Swing drive component; 103. Stop bar. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0037] This application discloses an automated airtightness testing device for workpieces. (Refer to...) Figure 1 and Figure 2The automated airtightness testing device for workpieces includes a frame 1, a feeding conveyor 2, a rotary feeding mechanism 3, and a testing actuator 4. The feeding conveyor 2 is a belt conveyor. The frame 1 is equipped with a circular worktable 5. The feeding conveyor 2 is used to sequentially convey workpieces to the upper surface of the worktable 5. The worktable 5 is equipped with a carrier 6. The rotary feeding mechanism 3 is used to sequentially move the workpieces conveyed by the feeding conveyor 2 to the worktable 5 above the carrier 6, and to move the workpieces away from the carrier 6. The testing actuator 4 is used to press against the workpiece located above the carrier 6, so that the airtightness testing device can perform airtightness testing on the workpiece.

[0038] Reference Figure 1 The rotary feeding mechanism 3 includes a rotary feeding plate 31 and a rotary drive assembly 32. The rotary drive assembly 32 includes a motor 321 and a Geneva mechanism 322. The motor 321 drives the rotary feeding plate 31 to rotate through the Geneva mechanism 322. The rotary feeding plate 31 is located above the worktable 5. The rotary feeding plate 31 is a circular plate, and its central part is rotatably connected to the worktable 5 through a main shaft 312. Six receiving notches 311 are equally spaced on the peripheral edge of the rotary feeding plate 31. The receiving notches 311 are used to receive the workpieces conveyed to the worktable 5 by the feeding conveyor mechanism 2. The worktable 5 is provided with an arc-shaped stop bar 51. The carrier 6 is located on the concave side of the arc-shaped stop bar 51, and the concave side of the arc-shaped stop bar 51 is adapted to the outer contour of the rotary feeding plate 31.

[0039] The motor 321 drives the rotating feed plate 31 to rotate through the grooved wheel mechanism 322, so that the continuous rotation of the motor 321 is converted into the unidirectional periodic rotation of the rotating feed plate 31 with pauses. This allows the rotating feed plate 31 to convey workpieces to the carrier 6 at the same time intervals through the receiving notch 311. During the pauses of the periodic rotation of the rotating feed plate 31, the detection actuator 4 can maintain contact with the workpiece above the carrier 6 for a certain period of time to perform airtightness testing.

[0040] Reference Figure 3 The main spindle 312 is fitted with a planar thrust ball bearing 52, and the worktable 5 is provided with a bearing mounting groove 53 for mounting the planar thrust ball bearing 52. The planar thrust ball bearing 52 is used to support the rotating feed plate 31, and can reduce the frictional resistance during the rotation of the rotating feed plate 31. The upper surface of the worktable 5 is embedded with a plurality of polytetrafluoroethylene (PTFE) pads 54, which are arranged in a circumferential array around the main spindle 312. The upper surface of the PTFE pads 54 abuts against the lower surface of the rotating feed plate 31. The PTFE pads 54 can separate the worktable 5 and the rotating feed plate 31, which helps to avoid friction between the rotating feed plate 31 and the worktable 5.

[0041] Reference Figure 2The upper surface of the workbench is provided with a mounting groove 55 for mounting the carrier 6. The edge of the groove 55 is chamfered 551. The upper surface of the carrier 6 is flush with or lower than the groove plane of the mounting groove 55. The rotating feeding plate 31 intermittently moves the workpiece on the feeding conveying mechanism 2 to the top of the carrier 6 through the receiving notch 311. The frame 1 is provided with a lifting drive 41. The detection execution component 4 is connected to the frame 1 through the lifting drive 41. The lifting drive 41 drives the detection execution component 4 to move closer to or away from the carrier 6.

[0042] Reference Figure 1 , Figure 2 and Figure 4 The upper surface of the rotary feed plate 31 is provided with six positioning components 7, which are respectively arranged one-to-one with six receiving notches 311. Each positioning component 7 includes two oppositely arranged sliding blocks 71, which are used to clamp the workpiece together. The two sliding blocks 71 are located on both sides of the receiving notch 311. The lower surface of the sliding block 71 is provided with guide blocks 72. Multiple guide blocks 72 can be arranged on each sliding block 71 as needed. Multiple guide blocks 72 located on the same sliding block 71 are arranged at intervals along the opening direction of the receiving notch 311. Guide grooves 313 are provided on both sides of the receiving notch 311 for the guide blocks 72 to slide. The extension direction of the guide grooves 313 is perpendicular to the opening direction of the receiving notch 311.

[0043] Two sliding blocks 71 in the same group are respectively provided with first magnets 73 on opposite sides. The two first magnets 73 have magnetic attraction between them. The worktable 5 is provided with second magnets 74. The upper surface of the worktable 5 is provided with telescopic grooves 57 for installing the second magnets 74. The telescopic grooves 57 are located inside the distribution range of each receiving notch 311, that is, the telescopic grooves 57 are close to the center of the worktable 5 relative to each receiving notch 311. The telescopic grooves 57 are located between the output end of the feeding conveying mechanism 2 and the main shaft 312.

[0044] A compression spring 75 is provided between the second magnet 74 and the bottom of the telescopic groove 57. The compression spring 75 is used to force the top of the second magnet 74 to abut against the upper surface of the rotating feed plate 31. The lower surface of the rotating feed plate 31 is provided with six clearance grooves 314. The six clearance grooves 314 correspond to six receiving notches 311 respectively. The clearance grooves 314 are used to avoid the upper part of the second magnet 74. The upper edge of the second magnet 74 is provided with a rounded corner 741. The radius of the rounded corner 741 is greater than the depth of the clearance groove 314.

[0045] When the receiving notch 311 rotates to the position to receive the workpiece, the compression spring 75 pushes the second magnet 74 into the clearance groove 314, so that the rounded corner 741 of the upper part of the second magnet 74 extends into the clearance groove 314. In this state, the second magnet 74 generates a repulsive force on the two first magnets 73 respectively, so as to force the two sliding blocks 71 to move away from each other, so that the feeding conveying mechanism 2 can easily feed the workpiece between the two sliding blocks 71. When the workpiece rotates away from the second magnet 74 with the receiving notch 311, the rotating feeding plate 31 gradually squeezes the second magnet 74 back into the telescopic groove 57. The repulsive force between the second magnet 74 and the first magnet 73 gradually disappears, and the magnetic attraction between the two first magnets 73 forces the two sliding blocks 71 to move closer to each other, so as to form a clamping effect on the workpiece, thereby keeping the position of the workpiece stable.

[0046] The sliding block 71 is connected to the rotating feed plate 31 by the guide and the guide groove 313. By replacing the sliding block 71 of different specifications, the positioning component 7 can be adapted to workpieces of different specifications.

[0047] Reference Figure 1 , Figure 5 and Figure 6 The workbench 5 has a discharge port 56, which is located on the side of the carrier 6 away from the feeding conveyor 2. The automated airtightness testing device also includes a discharge conveyor 8 and a collection trough 9. The discharge conveyor 8 is a belt conveyor. The collection trough 9 and the discharge conveyor 8 are arranged side by side in the horizontal direction and are both located below the workbench 5.

[0048] The frame 1 is provided with a guide plate 10, which is located below the discharge port 56 and above the input end of the discharge conveying mechanism 8. The guide plate 10 is provided with a rotating shaft 101, the axis of which is horizontal and perpendicular to the length direction of the discharge conveying mechanism 8. There is a gap allowance between the rotating shaft 101 and the upper edge of the guide plate 10. The guide plate 10 is rotatably connected to the frame 1 through the rotating shaft 101. The frame 1 is provided with a swing drive 102 for driving the guide plate 10 to swing back and forth around the rotating shaft 101. The swing drive 102 is an electric cylinder or a pneumatic cylinder. One end of the swing drive 102 is hinged to the guide plate 10, and the other end of the swing drive 102 is hinged to the frame 1.

[0049] The oscillating drive 102 drives the guide plate 10 to oscillate back and forth, allowing the guide plate 10 to tilt towards the discharge port 56 from different sides. The action of the oscillating drive 102 is related to the airtightness test result of the workpiece; when the workpiece is airtight, one side of the guide plate 10 faces the discharge port 56, and the guide plate 10 is used to guide the workpiece to the discharge conveying mechanism 8; when the workpiece is airtight, the other side of the guide plate 10 faces the discharge port 56, and the guide plate 10 is used to guide the workpiece to the collection tank 9, so that the workpieces that pass the airtightness test are separated from the workpieces that fail the airtightness test.

[0050] Reference Figure 6 The side wall of the collection trough 9 away from the discharge conveying mechanism 8 serves as a guide wall 91. The guide wall 91 gradually slopes down towards the discharge conveying mechanism 8. The guide wall 91 is used to receive the workpieces that slide down from the guide plate 10. The workpieces slide down into the collection trough 9 under the guidance of the guide wall 91, which can reduce the impact force during the sliding process of the workpieces.

[0051] Reference Figure 5 The guide plate 10 has a set of two baffles on each of its two opposite sides. The baffles are perpendicular to the rotating shaft 101, and the two baffles in the same set form a slide between the guide plate 10 and the guide plate 10. The workpiece slides down along the slide and is less likely to slide off the sides of the guide plate 10.

[0052] The implementation principle of the automated airtightness testing device for workpieces according to an embodiment of this application is as follows: When performing airtightness testing on a workpiece, the feeding conveyor 2 successively conveys the workpiece to the worktable 5, positioning it in the receiving notch 311 of the rotating feeder 31. The rotating feeder 31 then rotates and moves the workpiece from the receiving notch 311 to above the carrier 6. During the rotation and transfer of the workpiece by the rotating feeder 31, the arc-shaped baffle 51 provides auxiliary limiting and guiding for the workpiece. Then, the lifting drive 4 descends to perform airtightness testing on the workpiece on the carrier 6. After the test is completed, the lifting drive 41 drives the testing drive 4 to rise and reset. Subsequently, the rotating feeder 31 continues to operate, moving the tested workpiece to the unloading port 56, where it is unloaded. The guide plate 10 then guides the workpiece into the discharge conveyor 8 or the collection trough 9. In the above process, manual loading and unloading of the workpiece is eliminated during airtightness testing, automating the process and significantly improving testing efficiency.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automated airtightness testing device for workpieces, characterized in that: It includes a frame (1), a feeding conveying mechanism (2), a rotary feeding mechanism (3) and a detection actuator (4). The frame (1) is provided with a worktable (5). The worktable (5) has a discharge port (56). The feeding conveying mechanism (2) is used to transport the workpieces sequentially to the upper surface of the worktable (5). The rotary feeding mechanism (3) includes a rotary feeding plate (31) and a rotary drive assembly (32). The rotary feeding plate (31) is located above the worktable (5). The rotary feeding plate (31) is a circular plate. The center of the rotary feeding plate (31) is rotatably connected to the worktable (5) through a spindle (312). The peripheral edge of the rotary feeding plate (31) is provided with multiple receiving notches (311) at equal angles. The receiving notches (311) are used to receive the workpieces conveyed to the worktable (5) by the feeding conveying mechanism (2). The worktable (5) is provided with an arc-shaped baffle (51). The concave side of the arc-shaped baffle (51) is adapted to the outer contour of the rotary feeding plate (31). The workbench (5) is provided with a carrier (6), which is located between the feeding conveying mechanism (2) and the unloading port (56). The workbench (5) is provided with a mounting groove (55) for mounting the carrier (6). The carrier (6) is located on the concave side of the arc-shaped baffle (51). The rotating feed plate (31) is used to intermittently transfer the workpiece to the top of the carrier (6). The frame (1) is provided with a lifting drive (41). The detection execution component (4) is connected to the frame (1) through the lifting drive (41). The upper surface of the rotary feed plate (31) is provided with a plurality of positioning components (7), and the plurality of positioning components (7) are respectively arranged in a one-to-one correspondence with the plurality of receiving notches (311). The positioning component (7) includes two sliding blocks (71) arranged opposite to each other. The two sliding blocks (71) are used to clamp the workpiece together. The two sliding blocks (71) are respectively located on both sides of the receiving notch (311). The lower surface of the sliding block (71) is provided with a guide block (72). The two sides of the receiving notch (311) are respectively provided with guide grooves (313) for the guide block (72) to slide. The extension direction of the guide groove (313) is perpendicular to the opening direction of the receiving notch (311). The opposite sides of the two sliding blocks (71) in the same group are respectively provided with a first magnet (73). There is a magnetic attraction between the two first magnets (73). The worktable (5) is provided with a second magnet (74). The upper surface of the worktable (5) is provided with a telescopic groove (57) for installing the second magnet (74). The telescopic groove (57) is located between the output end of the feeding conveying mechanism (2) and the main shaft (312). The second magnet (74) is close to the center of the worktable (5) relative to each of the receiving notches (311). The second magnet (74) is located between the feeding conveying mechanism (2) and the main shaft (312). When the receiving notch (311) rotates to the position of receiving the workpiece, the second magnet (74) forms a repulsive force on the two first magnets (73) respectively, so as to force the two sliding blocks (71) to move away from each other. A compression spring (75) is provided between the second magnet (74) and the bottom of the telescopic groove (57). The compression spring (75) is used to force the top of the second magnet (74) to abut against the upper surface of the rotating feed plate (31). The lower surface of the rotating feed plate (31) is provided with a plurality of clearance grooves (314). The plurality of clearance grooves (314) correspond to a plurality of receiving notches (311). The clearance grooves (314) are used to avoid the upper part of the second magnet (74). The upper edge of the second magnet (74) is provided with a rounded corner (741). The radius of the rounded corner (741) is greater than the depth of the clearance groove (314).

2. The automated airtightness testing device for workpieces according to claim 1, characterized in that: The rotary drive assembly (32) includes a motor (321) and a Geneva mechanism (322), wherein the motor (321) drives the rotary feeder (31) to rotate through the Geneva mechanism (322).

3. The automated airtightness testing device for workpieces according to claim 1, characterized in that: The automated airtightness testing device also includes a discharge conveying mechanism (8) and a collection trough (9). The collection trough (9) and the discharge conveying mechanism (8) are arranged side by side in the horizontal direction and are both located below the worktable (5). The frame (1) is provided with a guide plate (10). The guide plate (10) is located below the discharge port (56) and above the input end of the discharge conveying mechanism (8). The guide plate (10) and the frame (1) are rotatably connected by a rotating shaft (101). The axis of the rotating shaft (101) is in the horizontal direction. There is a gap between the rotating shaft (101) and the upper edge of the guide plate (10). The frame (1) is provided with a swing drive (102) for driving the guide plate (10) to swing back and forth around the rotating shaft (101). The guide plate (10) is used to guide the workpiece to the discharge conveying mechanism (8) or the collection trough (9).

4. The automated airtightness testing device for a workpiece according to claim 3, characterized in that: The axial direction of the rotating shaft (101) is perpendicular to the length direction of the discharge conveying mechanism (8).

5. The automated airtightness testing device for a workpiece according to claim 3, characterized in that: The side wall of the collection trough (9) away from the discharge conveying mechanism (8) serves as a guide wall (91), which gradually slopes down towards the discharge conveying mechanism (8); the guide wall (91) is used to receive workpieces that slide off the guide plate (10).

6. The automated airtightness testing device for a workpiece according to claim 3, characterized in that: The guide plate (10) is provided with a set of baffles (103) on each of its two opposite sides. Each set of baffles (103) has two baffles (103). The baffles (103) are perpendicular to the rotating shaft (101). The two baffles (103) in the same set form a slide between the guide plate (10) and the guide plate (10).

7. The automated airtightness testing device for workpieces according to claim 1, characterized in that: The mounting groove (55) has a chamfer (551) at the edge of the groove, and the lower edge of the chamfer (551) is lower than the upper surface of the carrier (6).

8. The automated airtightness testing device for workpieces according to claim 1, characterized in that: The main shaft (312) is fitted with a planar thrust ball bearing (52), which is located between the worktable (5) and the rotating feed plate (31). The planar thrust ball bearing (52) is used to support the rotating feed plate (31).

9. The automated airtightness testing device for workpieces according to claim 1, characterized in that: The upper surface of the workbench (5) is provided with a plurality of polytetrafluoroethylene pads (54), and the upper surface of the polytetrafluoroethylene pads (54) abuts against the rotating feed plate (31).

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