Sealing test device and sealing test method thereof

Abstract

The present invention discloses a sealing test device and a sealing test method thereof, wherein the sealing test device includes a lifting device, having a liftable bracket and a driving device for driving the lifting thereof; a fixed frame, the gap of which is set above the lifting device; a workpiece sealing mold, which is adjustably set on the fixed frame and can be rotated toward the lifting device; and a workpiece conveying mechanism, which can move the workpiece located thereon from the outside of the lifting device to between the lifting device and the workpiece sealing mold. This scheme positions and conveys the workpiece through the workpiece conveying mechanism, and combines the lifting device to combine the workpiece and the mold into a cavity, thereby providing an effective implementation device for automated sealing testing, and the mold is fixed to the fixed frame in an adjustable position manner, so that the mold can be easily installed, providing convenient conditions for testing, and helping to reduce the difficulty of equipment assembly.

Description

Technical Field

[0001] The present invention relates to the field of battery pack processing equipment, and in particular to a sealing test device and a sealing test method thereof. Background Art

[0002] With the rapid development of new energy vehicles, battery packs, as core components of new energy vehicles, have attracted more and more attention from companies.

[0003] During the battery pack production process, the battery pack's sealing and waterproof performance is an important safety requirement. The protection level requirements for battery packs in certain locations are more stringent. For example, the battery packs arranged at the bottom have a sealing level of IP67. When the sealing of the battery pack does not meet the requirements, dust, moisture, and even water leakage may occur in the battery pack. These situations will cause damage to the battery system, and more seriously, may lead to safety accidents.

[0004] The sealing performance of the battery pack PACK shell (including the battery pack PACK upper cover and the battery pack PACK lower shell) itself is the key factor affecting the sealing of the battery pack. Therefore, it is very important to test the sealing performance of the battery pack PACK shell. Therefore, it is necessary to conduct sealing tests on the battery pack PACK upper cover and the battery pack PACK lower shell respectively. However, at present, few manufacturers test the battery pack PACK lower shell, and even fewer have dedicated equipment for corresponding testing. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems existing in the prior art and to provide a sealing test device and a sealing test method thereof.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] Leakage test device, including

[0008] A lifting device, comprising a lifting bracket and a driving device for driving the lifting bracket;

[0009] A fixing frame, the gap of which is arranged above the jacking device;

[0010] A workpiece sealing mold, which is adjustably arranged on the fixing frame and can be oriented toward the lifting device;

[0011] The workpiece conveying mechanism includes a transfer frame, on which a workpiece positioning frame and a workpiece locking mechanism can be arranged to be raised and lowered relative to the transfer frame. The transfer frame can move between a first position and a second position. At the first position, the workpiece positioning frame is located outside the lifting device. At the second position, the workpiece positioning frame is located between the lifting device and the workpiece sealing mold.

[0012] Preferably, in the sealing test device, a plurality of pads are provided at the bottom of the bracket, each pad corresponds to a support block located on the table, each support block is connected to a translation mechanism, and the translation mechanism drives each support block to move between the outside of the corresponding pad and under the corresponding pad, and the support block abuts against the pad when it is under the pad.

[0013] Preferably, in the sealing test device, the fixed frame includes a plurality of mold placement positions, which are distributed in a regular polygon. The fixed frame is mounted on a vertical frame and can rotate around a rotating shaft. The rotating shaft is coaxial with the central axis of the regular polygon enclosed by the plurality of mold placement positions. A fixed frame locking device is provided on the vertical frame.

[0014] Preferably, in the sealing test device, the fixing frame locking device comprises locking cylinders fixed on both sides of the stand, each locking cylinder is connected to a locking pin, and each locking pin is coaxial with a locking groove at the end of the fixing frame.

[0015] Preferably, in the sealing test device, there are three mold placement positions distributed in an equilateral triangle, a workpiece sealing mold is arranged on each mold placement position, the rotating shaft is connected to a reducer, and the reducer is connected to a motor.

[0016] Preferably, in the sealing test device, the reducer is a two-stage reducer.

[0017] Preferably, in the sealing testing device, the fixed frame is provided with a locking mechanism for locking the workpiece sealing mold and an anti-falling mechanism for adjusting the position of the workpiece sealing mold on the fixed frame, the anti-falling mechanism includes an anti-falling bolt passing through a substrate of the workpiece sealing mold, the aperture of the through hole on the substrate for the anti-falling bolt to pass through is larger than the diameter of the screw rod of the anti-falling bolt and smaller than the diameter of the tail of the anti-falling bolt, the anti-falling bolt is coaxially connected with a fine-tuning block, the fine-tuning block is located in a limiting block and can move relative to the limiting block, and the limiting block is fixed to the back side of the mounting plate of the fixed frame.

[0018] Preferably, in the sealing test device, the workpiece locking mechanism comprises a first locking mechanism and a second locking mechanism which are arranged opposite to each other, and the second locking mechanism is connected to a distance adjusting device which drives it to move reciprocatingly linearly relative to the first locking mechanism to adjust the distance between them.

[0019] Preferably, in the sealing test device, the distance adjustment device is driven by a two-stage cylinder.

[0020] The sealing test method comprises at least the following steps:

[0021] S1, the motor drives the fixed frame to rotate and stops after the workpiece sealing mold matching the workpiece size faces downward;

[0022] S2, the fixing frame locking device locks the fixing frame;

[0023] S3, placing the workpiece on the workpiece positioning frame at the first position, the workpiece locking mechanism fixes the workpiece on the workpiece positioning frame, and then the transfer frame moves to the second position, so that the workpiece moves to the bottom of the workpiece sealing mold;

[0024] S4, the driving device of the lifting device drives the bracket to lift and drives the workpiece positioning frame to lift, so that the workpiece and the workpiece sealing mold maintain a distance of less than 1mm, and then the support block moves from the outside of the cushion block to the bottom of the cushion block.

[0025] The advantages of the technical solution of the present invention are mainly reflected in:

[0026] This solution uses a workpiece conveying mechanism to position and convey the workpiece, and combines the workpiece and the mold into a cavity in combination with a jacking device, thereby providing an effective implementation device for automated sealing testing. The mold is fixed to a fixed frame in an adjustable position, which facilitates the installation of the mold, provides convenient conditions for testing, and helps reduce the difficulty of equipment assembly.

[0027] The jacking device adopts support blocks to support pads, which can effectively avoid the cylinder from being stressed, protect the cylinder to the greatest extent, and ensure the effectiveness and stability of the jacking support.

[0028] The fixing frame of the present invention adopts multiple placement positions and can be replaced by rotation. It can adopt multiple workpiece sealing molds of different sizes to meet the testing requirements of the lower shell of battery packs PACK of different sizes, and the mold replacement is flexible and reliable.

[0029] The mold fixing structure and fine-tuning structure at each placement position on the fixing frame of the present invention effectively meet the needs of rapid installation of the workpiece sealing mold, can greatly improve the assembly efficiency, and can flexibly adjust the installation position of the workpiece sealing mold, thereby improving flexibility.

[0030] The fixed frame of this solution is driven by a two-stage reducer, which can effectively increase the driving force and improve the effectiveness of the drive.

[0031] The workpiece locking mechanism of the present invention adopts two relatively movable pressure-applying mechanisms, which can flexibly meet the fixing requirements of workpieces of different sizes. At the same time, the two-stage cylinder is adopted, which can effectively improve the adjustment efficiency and the position accuracy of the adjustment.

[0032] During testing, this solution maintains a small gap between the workpiece and the mold, thereby facilitating the movement of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a three-dimensional diagram of the sealing test device of the present invention;

[0034] Figure 2 is a perspective view of the jacking device of the present invention;

[0035] Figure 3 is an end cross-sectional view of a fixing frame of the present invention;

[0036] Figure 4 is a front view of the sealing test device of the present invention;

[0037] Figure 5 yes Figure 1 A magnified image of area A;

[0038] Figure 6 yes Figure 3 Enlarged view of area B;

[0039] Figure 7 is a three-dimensional diagram of the workpiece conveying mechanism of the present invention;

[0040] Figure 8 is a side view of the workpiece conveying mechanism of the present invention;

[0041] Fig. 9 It is an end view of the workpiece conveying mechanism of the present invention. DETAILED DESCRIPTION

[0042] The purpose, advantages and features of the present invention will be illustrated and explained by the non-limiting description of the following preferred embodiments. These embodiments are only typical examples of the application of the technical solution of the present invention, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection claimed by the present invention.

[0043] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0044] The sealing test device disclosed in the present invention is described below in conjunction with the accompanying drawings. The sealing test device can be used for sealing test of various half-shell structures. In this embodiment, the sealing test of the lower shell of the battery pack PACK is used as an example for description. Figure 1 As shown, it includes a lifting device 100, a fixing frame 200, a workpiece sealing mold 300 and a workpiece conveying mechanism 400.

[0045] The lifting device 100 is used to lift the workpiece on the workpiece conveying mechanism 400 to fit with the workpiece sealing mold 300 to form a closable cavity, so that the sealing test can be achieved by inflating the air pressure in the test cavity.

[0046] As attached Figure 2 As shown, the lifting device 100 includes a jacking bracket 110 and a driving device 120 for driving the bracket 110 to rise and fall; the bracket 110 is a rectangular parallelepiped frame composed of multiple profiles, and the driving device 120 is two fixed-position cylinders, which are fixed on a platform 160 and connected to the bottom of the bracket 110 through a connecting piece. In order to ensure the stability of the bracket 110 when rising and falling, a group of guide shafts 170 are provided at the bottom of the bracket 110, and the guide shafts 170 can be slidably inserted into guide sleeves 180 provided on the platform 160.

[0047] During the test, the bracket 110 is continuously subjected to downward pressure, which is disadvantageous for the stable operation of the driving device 120. Figure 2 As shown, a plurality of pads 130 are provided at the bottom of the bracket 110, preferably 6 pads 130, and are distributed near the two long sides of the bracket 110, each pad 130 corresponds to a support block 140 located on the table 160, each support block 140 is connected to a translation mechanism 150, and the translation mechanism 150 includes a push cylinder 151 fixed on the table 160, the cylinder axis of the push cylinder 151 extends along the length direction of the bracket 110, the push cylinder 151 is connected to a connecting rod 152, and the two ends of the connecting plate 152 are respectively connected to a flat plate 153 perpendicular to it, and the support block 140 It is arranged on the flat plate 153, and each of the flat plates 153 can be slidably arranged on two guide rails 154. The translation mechanism 150 drives each of the support blocks 140 to move between the outside of the corresponding pad block 130 and the bottom of the corresponding pad block 130. When the support block 140 is below the pad block 130, it abuts against the pad block 130, so that each of the support blocks 140 can provide support for the pad block 130. At this time, the pressure on the bracket 110 is transmitted to the table plate 160, and less is transmitted to the driving device 120, which can effectively protect the driving device and ensure the reliability of the seal.

[0048] As attached Figure 1 As shown, the fixing frame 200 is gapped above the lifting device 100, which is used to install the workpiece sealing mold 300 and make the workpiece sealing mold 300 at a fixed height and facing the lifting device, so that the workpiece sealing mold 300 can be combined with the lifted lower shell of the battery pack PACK to form a structure with a cavity.

[0049] When the entire testing equipment is only used for testing the lower shell of a battery pack PACK of one size, at this time, only one workpiece sealing mold 300 is required, and the corresponding fixed frame 200 can be a frame with a fixed installation height and position, and the workpiece sealing mold 300 is adjustably arranged on the fixed frame 200.

[0050] In a more preferred embodiment, the testing equipment is used for testing lower shells of battery packs PACK of multiple different sizes. At this time, workpiece sealing molds 300 of different sizes are required. Correspondingly, the fixing frame 200 needs to be convenient for replacing the workpiece sealing mold 300 on the fixing frame 200 according to the size of the lower shell of the battery pack PACK to be tested.

[0051] Specifically, as attached Figure 3 , Attachment Figure 4 As shown, the fixing frame 200 includes a plurality of mold placement positions 210 , and a workpiece sealing mold 300 is disposed on each of the mold placement positions 210 . The lengths of the plurality of workpiece sealing molds 300 are different.

[0052] As attached Figure 3 As shown, each of the mold placement positions 210 includes a rectangular frame 211 formed of a profile, and a mounting plate 212 is provided on the rectangular frame 211. The plurality of mold placement positions 210 are distributed in the form of a regular polygon. Preferably, there are three mold placement positions 210 and they are distributed in the form of an equilateral triangle, and the three mold placement positions 210 form a triangular prism.

[0053] As attached Figure 3 , Attachment Figure 4 As shown, a connecting profile 220 is arranged in the middle position of the profile at both ends of each mold placement position 210, and the three connecting profiles 220 at one end are connected to the three connecting profiles 220 at the other end through a main beam 230. The main beam 230 is also connected to the rectangular frame 211 of each mold placement position 210 through a reinforcing beam. The three connecting profiles 230 at each end are respectively fixed to a disk 240, and the two disks 240 are coaxial with the central axis of the triangular prism surrounded by the three mold placement positions 210. At the same time, a rotating shaft 250 is coaxially arranged on the outer end face of each disk 240, and the two rotating shafts 250 are respectively rotatably arranged on the stand 600.

[0054] The fixing frame 200 can be rotated manually or automatically, preferably automatically. Figure 1 As shown, one of the two rotating shafts 250 is connected to a reducer 700 , and the reducer 700 is preferably a two-stage reducer and is fixed on a stand 600 on one side, so that it can have a greater power output, and the reducer 700 is connected to a motor 800 .

[0055] Since the fixing frame 200 needs to be rotated, the fixing frame 200 needs to be kept in a fixed position after the rotation to ensure that the required workpiece sealing mold 300 faces downward and directly faces the lifting device 100, as shown in the attached Figure 1 As shown, the fixing frame 200 is fixed by arranging a fixing frame locking device 500 on the stand 600 .

[0056] Specifically, as attached Figure 5 As shown, a fixing plate 290 is provided at each vertex position at both ends of the fixing frame 200 , and each fixing plate 290 is provided with two locking grooves 260 . Of course, each fixing plate 290 may also be provided with one locking groove 260 . The fixed frame locking device 500 includes a locking cylinder 510 fixed on both sides of the vertical frame 600, the cylinder axis of the locking cylinder 510 is parallel to the central axis of the fixed frame 200, and each of the locking cylinders 510 is connected to a locking pin 520, and the locking pin 520 is slidably set on the guide member 530, each of the locking pins 520 is coaxial with a locking groove 260 on the two fixed plates 290 below, and the position of each locking pin 520 is designed according to the position of the locking groove 260, and when the cylinder axes of the four locking cylinders 510 are extended, the four locking pins 520 are respectively inserted into the locking grooves 260 on the lower sides of the two ends of the fixed frame 200 to lock the fixed frame. At this time, any workpiece sealing mold 300 on the fixed frame 200 faces downward.

[0057] As attached Figure 1 As shown, the workpiece sealing mold 300 is adjustably arranged on the fixing frame 200 and can be rotated toward the lifting device 100; it has a profiling structure 310 matching the lower shell of the battery pack PACK, and the profiling structure 310 can be combined with the lower shell of the battery pack PACK to form a closable cavity, and the profiling structure 310 is fixed to a base plate 320, and the base plate 320 is also provided with a positioning pin 330 corresponding to the positioning sleeve on the workpiece conveying mechanism 400. Preferably, as shown in the attached Figure 4 As shown, there are three workpiece sealing molds 300 and their sizes are different, so as to adapt to the test requirements of the lower shells of three battery packs PACK of different sizes.

[0058] Since the workpiece sealing mold 300 will be in a downward state when rotating, it is necessary to fix the workpiece sealing mold 300 at each of the mold placement positions 210. In order to facilitate the placement and fixation of the workpiece sealing mold 300, a group of locking mechanisms for locking the workpiece sealing mold and an anti-falling mechanism 280 for adjusting the position of the workpiece sealing mold are provided on the fixing frame 200.

[0059] As attached Figure 5 As shown, the locking mechanism includes a group of locking bolts 271, and there are eight locking bolts 271. Each locking bolt 271 is screwed on a base block 272, and the base block 272 is fixed to the mounting plate 212. Two locking bolts 271 form a pair for fixing one vertex angle of the base plate 320. Four pairs of locking bolts 271 fix the four vertex angles of the base plate 320, so that the installation position of the base plate 320 can be fine-tuned as needed.

[0060] Furthermore, in order to prevent the workpiece sealing mold 300 from falling off from the mold placement position 210, the position of the workpiece sealing mold 300 is adjustable. Figure 6 As shown, the anti-falling mechanism includes an anti-falling bolt 281 which vertically passes through the base plate 320 of the workpiece sealing mold 300, the aperture of the through hole 321 on the base plate 320 for the anti-falling bolt 281 to pass through is larger than the diameter of the screw rod 2811 of the anti-falling bolt 281, and smaller than the diameter of the tail of the anti-falling bolt 281, the anti-falling bolt 281 is coaxially connected with a fine-tuning block 282, the fine-tuning block 282 is located in a groove 2831 of a limiting block 283 and can move relative to the limiting block 283, the limiting block 283 is fixed to the back side of the mounting plate to which each mold of the fixing frame 200 is fixed, and at the same time, the fine-tuning block 282 is in contact with the mounting plate 212, the tail of the anti-falling bolt 281 is in contact with the upper surface of the base plate 320 of the workpiece sealing mold 300, and the anti-falling bolt 281 passes through the bottom plate of the limiting block 283 and is connected to the nut 284.

[0061] As attached Figure 7 -Attached Fig. 9 As shown, the workpiece conveying mechanism 400 is used to limit the lower shell of the battery pack PACK and move the lower shell of the battery pack PACK from the outside of the lifting device 100 to the top of the lifting device 100, and includes a transfer rack 410, on which a workpiece positioning rack 420 and a workpiece locking mechanism 430 can be arranged to be raised and lowered relative to the transfer rack 410, and the transfer rack 410 can move between a first position and a second position. At the first position, the workpiece positioning rack is located at the outside of the lifting device 100, and at the second position, the workpiece positioning rack is located between the lifting device and the workpiece sealing mold 300.

[0062] As attached Figure 7 -Attached Fig. 9 As shown, the transfer rack 410 includes side frames 411 located on both sides, and a rectangular support bracket 412 is fixed on the two side frames 411. The support bracket 412 has an escape space corresponding to the workpiece positioning frame 420 so that the lifting device 100 can lift the workpiece positioning frame 420. Each of the side frames 411 is slidably arranged on a guide rail 450, and the support bracket 412 is connected to a slide cylinder 460 that drives the entire transfer rack 410 to reciprocate between the first position and the second position along the guide rail 450, and the position of the slide cylinder 460 is fixed. Of course, the slide cylinder 460 can also be replaced by an electric cylinder or an ordinary cylinder or other devices that can produce linear movement.

[0063] As attached Figure 7 -Attached Fig. 9 As shown, the workpiece positioning frame 420 is mounted on the transfer frame 410. The workpiece positioning frame 420 includes a frame 421 made of a profile. The frame 421 is provided with a plurality of positioning blocks 422 and a plurality of side blocks 423 for positioning the lower shell of the battery pack PACK. Their specific positions are designed to be adaptively adjusted according to the shape of the lower shell of the battery pack PACK. At the same time, some or all of the plurality of positioning blocks 422 can be used as plugs to block the through holes on the lower shell of the battery pack PACK. A group of guide posts 470 extending in the longitudinal direction are provided at the bottom of the frame 421. Each guide post 470 can be slidably inserted into a guide sleeve 480 on the transfer frame 410.

[0064] As attached Figure 7 -Attached Fig. 9 As shown, the workpiece locking mechanism 430 is used to fix the lower shell of the battery pack PACK on the workpiece positioning frame 420, and includes a first locking mechanism and a second locking mechanism that are relatively arranged. They are arranged at both ends of the workpiece positioning frame 420, and the first locking mechanism and the second locking mechanism have the same structure and both include a clamping cylinder 431. The clamping cylinder 431 is arranged to be tilted upward, and the cylinder axis of the clamping cylinder 431 is vertically connected to the pressure plate 432.

[0065] As attached Figure 7 -Attached Fig. 9As shown, in order to adapt to the fixing requirements of the lower shell of battery packs PACK of different sizes, the position of the second locking mechanism is made adjustable, that is, the second locking mechanism is connected to a distance adjusting device 440 that drives it to move linearly relative to the first locking mechanism, and the second locking mechanism is arranged on a movable frame 441, and the movable frame 441 is slidably arranged on a track 442 extending along the length direction of the workpiece positioning frame on both sides of the long side of the workpiece positioning frame, and the track 442 is fixed on the transfer frame 410, and the movable frame 441 is connected to a sliding drive device 443 that drives it to move along the track 442. The sliding drive device can be various feasible drive devices, such as a rodless cylinder, a linear motor, a hydraulic cylinder, etc. In a preferred embodiment, in order to quickly meet the fixing of three lower shells of battery packs PACK of different sizes, the distance adjusting device 440 adopts a two-stage cylinder drive, that is, the sliding drive device 443 is driven by two connected cylinders, thereby realizing three position changes.

[0066] The method for testing the sealing performance of the lower shell of the battery pack PACK using the sealing performance testing device mentioned above comprises the following steps:

[0067] S1, according to the lower shell of the battery pack PACK to be tested, the motor 800 starts to drive the fixing frame 200 to rotate, so that the workpiece sealing mold 300 on it that matches the size of the lower shell of the battery pack PACK faces downward to the jacking device 100, and then the motor 800 stops.

[0068] S2, then, the four locking cylinders 510 of the fixing frame locking device 500 are started to insert the four locking pins 520 into the four locking grooves 260 at both ends of the fixing frame to lock the fixing frame 200.

[0069] S3, the lower shell of the battery pack PACK is placed on the workpiece positioning frame 420 located at the first position, and then the workpiece locking mechanism 430 fixes the lower shell of the battery pack PACK on the workpiece positioning frame and seals the through holes thereon. Subsequently, the slide cylinder 460 is started to move the transfer frame 410 to the second position, so that the lower shell of the battery pack PACK is moved to directly below the workpiece sealing mold 300.

[0070] S4, the driving device 120 of the lifting device 100 drives the bracket 110 to lift and drives the workpiece positioning frame 420 to lift, so that the lower shell of the battery pack PACK and the workpiece sealing mold 300 maintain a distance of less than 1 mm, and then the push cylinder 151 starts to drive the 6 support blocks 140 to move from the outside of the cushion block 130 to the bottom of the cushion block 130.

[0071] Finally, the air holes of the lower shell of the battery pack PACK are connected through the air supply and leak detection system, and the air is inflated and the pressure value is detected to determine the sealing of the lower shell of the battery pack PACK. The process here is a known technology and is not the design point of this solution, so it will not be described here. After the test is completed, the jacking device 100 is reset, and the workpiece positioning frame 420 moves to the first position, the lower shell of the battery pack PACK is released, the material is unloaded, and then the material is reloaded, and the above test process is repeated.

[0072] There are many implementation methods of the present invention, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the present invention.

Claims

1. Sealing test device, Features: include A lifting device (100) comprising a liftable bracket (110) and a driving device (120) for driving the bracket to be lifted or lowered; A fixing frame (200), the gap being arranged above the lifting device (100); A workpiece sealing mold (300) is adjustably disposed on the fixing frame (200) and is movable toward the lifting device; The workpiece conveying mechanism (400) comprises a transfer frame (410), on which a workpiece positioning frame (420) and a workpiece locking mechanism (430) are arranged so as to be able to be raised and lowered relative to the transfer frame (410), and the transfer frame (410) is able to move between a first position and a second position, wherein at the first position, the workpiece positioning frame is located outside the lifting device (100), and at the second position, the workpiece positioning frame is located between the lifting device and the workpiece sealing mold (300); The fixed frame (200) comprises a plurality of mold placement positions (210) which are distributed in the form of a regular polygon. The fixed frame (200) is mounted on the vertical frame (600) via a rotating shaft and can rotate around the rotating shaft. The rotating shaft is coaxial with the central axis of the regular polygon formed by the plurality of mold placement positions. The vertical frame (600) is provided with a fixed frame locking device (500); the fixed frame locking device (500) comprises locking cylinders (510) fixed on both sides of the vertical frame (600), each locking cylinder (510) is connected to a locking pin (520), and each locking pin (520) is coaxial with a locking groove at the end of the fixed frame (200); there are three mold placement positions (210) which are distributed in the form of an equilateral triangle, and each mold placement position (210) is provided with a workpiece sealing mold (300). The rotating shaft is connected to a reducer (700), and the reducer is connected to a motor (800); The fixing frame (200) is provided with a locking mechanism for locking the workpiece sealing mold and an anti-falling mechanism for adjusting the position of the workpiece sealing mold on the fixing frame, the anti-falling mechanism comprising an anti-falling bolt (281) passing through a base plate of the workpiece sealing mold, the aperture of a through hole on the base plate through which the anti-falling bolt (281) passes is larger than the diameter of the screw rod of the anti-falling bolt and smaller than the diameter of the tail of the anti-falling bolt, the anti-falling bolt (281) is coaxially connected with a fine-tuning block (282) The fine-tuning block (282) is located in a limiting block (283) and is movable relative to the limiting block (283); the limiting block (283) is fixed to the back side of the mounting plate of the fixing frame (200); the workpiece locking mechanism (430) comprises a first locking mechanism and a second locking mechanism which are arranged opposite to each other; the second locking mechanism is connected to a distance adjusting device (440) which is driven to reciprocate linearly relative to the first locking mechanism to adjust the distance between them; the distance adjusting device (440) is driven by a two-stage cylinder.

2. The sealing test device according to claim 1, Features: A plurality of cushion blocks (130) are arranged at the bottom of the bracket (110), each cushion block (130) corresponds to a support block (140) located on the platform (160), each support block (140) is connected to a translation mechanism (150), and the translation mechanism (150) drives each support block (140) to move between the outside of the cushion block (130) corresponding thereto and below the cushion block (130) corresponding thereto, and when the support block (140) is below the cushion block (130), it abuts against the cushion block (130).

3. The sealing test method of the sealing test device according to claim 1, Features: At least the following steps are included: S1, the motor drives the fixed frame to rotate and stops after the workpiece sealing mold matching the workpiece size faces downward; S2, the fixing frame locking device locks the fixing frame; S3, placing the workpiece on the workpiece positioning frame at the first position, the workpiece locking mechanism fixes the workpiece on the workpiece positioning frame, and then the transfer frame moves to the second position, so that the workpiece moves to the bottom of the workpiece sealing mold; S4, the driving device of the lifting device drives the bracket to lift and drives the workpiece positioning frame to lift, so that the workpiece and the workpiece sealing mold maintain a distance of less than 1mm, and then the support block moves from the outside of the cushion block to the bottom of the cushion block.

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