A coupling sealing torque testing device

Abstract

The present invention relates to a coupling sealing torque test device, belonging to the technical field of inspection and testing equipment. The device includes a test fixture and an industrial vision device, a test fixture installation mechanism, a tightening mechanism, a torque test shaft mechanism, and a torque test positioning mechanism connected in series by a transfer mechanism. The present invention organically combines various functional mechanisms. After adoption, it can realize automatic detection of the coupling bellows fitting torque, significantly improving the accuracy and reliability of the test process and result determination. The entire test process does not require human intervention, improving work efficiency, and has good versatility, which can meet the testing requirements of various specifications of coupling products.

Description

Technical Field

[0001] The invention relates to a testing device, in particular to a coupling sealing torque testing device, belonging to the technical field of inspection and testing equipment. Background Art

[0002] In order to ensure that coupling devices such as gear couplings have good mechanical properties, their interiors need to be fully lubricated, so it is very important to ensure that the coupling seals reliably.

[0003] According to the applicant, common coupling seals utilize an elastic metal bellows flanged onto an internal gear sleeve. The fit between the bellows and the internal gear sleeve is crucial for ensuring a good coupling seal. In addition to testing for tightness, testing the fit torque between the workpieces can more intuitively demonstrate the bellows assembly quality and sealing performance. For a long time, this torque testing has relied on manual labor. Manual testing not only makes it difficult to achieve a uniform increase in applied torque and precisely control the final torque, impacting the accuracy of test results, but also requires multiple tooling, making the testing process cumbersome and inefficient. Summary of the Invention

[0004] The purpose of the present invention is to propose a coupling seal torque testing device that can ensure accurate test results, significantly improve efficiency, and has strong applicability, in response to the backwardness of the above-mentioned existing technology.

[0005] In order to achieve the above-mentioned object, the basic technical scheme of the coupling seal torque test device of the present invention is as follows: comprising a test fixture and an industrial vision device connected in series by a transfer mechanism, a test fixture installation mechanism, a tightening mechanism, a torque test shaft mechanism and a torque test positioning mechanism;

[0006] The test fixture includes a central boss, a positioning flange for fixing the workpiece to be tested, and an annular top cover fixed on the positioning flange, wherein the central boss has an adapting structure respectively corresponding to the components of the torque test shaft mechanism and the fixture mounting mechanism;

[0007] The transfer mechanism includes a transfer base plate that forms a moving pair with the X-guide rail, the transfer base plate is equipped with a positioning base plate that forms a lifting moving pair with the transfer base plate, the positioning base plate is equipped with a left positioning plate and a right positioning plate that form a matching moving pair, and forms a rotating pair with a rotating support plate located between the left positioning plate and the right positioning plate;

[0008] The test fixture installation mechanism includes a mounting gantry structure composed of two side pillars and a mounting support plate that spans the X-guide rail. The mounting support plate is equipped with a first horizontal guide rail and a first Z-axis moving mechanism that forms a moving pair therewith. The lower end of the Z-axis moving mechanism is equipped with an openable and closable clamping claw located below the mounting support plate. A tool transfer mechanism that can place and translate the test fixture is installed on one side of the pillar.

[0009] The tightening mechanism includes a tightening gantry structure formed by two side columns and a fixed support plate spanning the X-guide rail, the fixed support plate is equipped with a second horizontal guide rail and a tightening gun distance adjustment mechanism forming a moving pair therewith, and a tightening gun that can be raised and lowered is installed at the lower end of the tightening gun distance adjustment mechanism; a second Z-axis moving mechanism is installed on one side of the middle of the fixed support plate, the lower end of which can press the workpiece to be tested;

[0010] The torque test shaft mechanism includes a third Z-axis moving mechanism installed on the other side of the fixed support plate, and the third Z-axis moving mechanism is equipped with a driving shaft for applying a predetermined torque to the workpiece being tested, as well as a torque sensor and an angle sensor therein;

[0011] The torque test positioning mechanism includes a third gantry structure consisting of two side legs and a flat plate, on which is mounted an annular liftable positioning plate coaxially mounted below the drive shaft for limiting the rotation of the workpiece being tested.

[0012] The present invention organically combines various functional mechanisms, which can realize automatic detection of the coupling bellows fitting torque, significantly improving the accuracy and reliability of the test process and result judgment. The entire test process does not require manual intervention, which improves work efficiency. It also has good versatility and can meet the testing needs of coupling products of various specifications.

[0013] The present invention is further improved by:

[0014] The upper end surface of the central boss of the positioning flange of the test fixture has an interface that cooperates with the torque test shaft, and the side surface has an interface that cooperates with the test fixture and the clamping claw.

[0015] An anti-slip sealing ring and a positioning pin are provided at the bottom of the positioning flange.

[0016] The rotating support plate is in transmission connection with a rotating mechanism fixed below the positioning base plate.

[0017] The left positioning plate and the right positioning plate are respectively moved synchronously along two sets of guide rails installed on the positioning base plate to achieve clamping or loosening.

[0018] The Z-axis moving mechanism has an electric cylinder that drives the clamping claw to move up and down along the guide rod.

[0019] The tooling transfer plate is provided with two tooling placement spaces.

[0020] The tightening gun distance adjustment mechanism comprises a pair of tightening gun large supports with adjustable spacing, and the tightening gun large supports are used to mount the tightening gun via a liftable tightening gun small support. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention.

[0022] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the transfer mechanism in the embodiment.

[0023] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the test tool in the embodiment.

[0024] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of the test tool in the embodiment.

[0025] Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the test tool installation mechanism in the embodiment.

[0026] Figure 6 for Figure 1 Schematic diagram of the three-dimensional structure of the fastening and tightening mechanism in the embodiment.

[0027] Figure 7 for Figure 1 Schematic diagram of the three-dimensional structure of the torque test shaft mechanism in the embodiment.

[0028] Figure 8 for Figure 1 Schematic diagram of the three-dimensional structure of the torque test positioning mechanism in the embodiment.

[0029] Figure 9 for Figure 1 Schematic diagram of the cross-sectional structure of the torque test positioning mechanism in the embodiment.

[0030] Figure 10 for Figure 1 Schematic diagram of the three-dimensional structure of the workpiece being tested in the embodiment.

[0031] Figure 11 This is an example of a torque test curve.

[0032] In the figure: 100-transfer mechanism; 111-transfer mechanism X-axis moving electric cylinder; 112-transfer base plate; 113-transfer mechanism X-axis guide rail 1; 114-transfer mechanism X-axis guide rail 2; 121-rotating support plate; 122-rotating motor; 130-positioning clamping mechanism; 131-right positioning plate; 132-left positioning plate; 133-positioning clamping cylinder; 134-positioning clamping guide rail; 141-lifting mechanism cylinder; 142-positioning base plate; 200-test fixture; 210-positioning flange; 21 1- Anti-slip seal; 212- Positioning pin; 213- Positioning flange upper end square opening; 214- Positioning flange side square opening; 220- Top cover; 230- Bolt assembly; 300- Test fixture installation mechanism; 311- Z-axis moving electric cylinder; 312- Guide rod; 313- Flat plate; 321- Clamping jaw; 322- Clamping jaw mechanism cylinder; 331- Y-axis moving cylinder; 332- Y-axis moving guide rail 1; 333- Y-axis moving guide rail 2; 341- Tool transfer plate; 342- Tool transfer cylinder; 343- Support Frame; 400- Fastening and tightening mechanism; 410- Pillar; 420- Support plate; 431- Z-axis movable support; 432- Z-axis movable electric cylinder; 433- Plate; 441- Tightening gun distance adjustment cylinder; 442- Guide rail; 443- Tightening gun seat 1; 444- Tightening gun seat 2; 451- Tightening gun 1; 452- Tightening gun 2; 500- Torque test shaft mechanism; 511- Motor; 512- Torque sensor; 513- Angle sensor; 514- Shaft; 521- Z-axis movable electric cylinder; 522-Torque test shaft support seat; 530-Support; 600-Torque test positioning mechanism; 610-Plate; 620-Pillar; 631-Positioning plate 1 drives cylinder 1; 632-Positioning plate 1 drives cylinder 2; 633-Positioning plate 1; 634-Positioning pin; 641-Positioning plate 2 drives electric cylinder 1; 642-Positioning plate 2 drives electric cylinder 2; 643-Positioning plate 2; 644-Positioning pin; 700-Industrial vision device; 800-Tested workpiece; 810-Sealing element; 820-Internal gear sleeve. DETAILED DESCRIPTION

[0033] Example 1

[0034] The workpiece 800 to be tested in this embodiment is as follows Figure 10 As shown, it mainly consists of an internal gear sleeve 820 with a bottom positioning flange and a sealing element 810 placed in the inner hole of the internal gear sleeve 820 away from the positioning flange. The coupling sealing torque test device of this embodiment determines the product assembly quality by testing the fitting torque and delay between the sealing element 810 and the internal gear sleeve 820. Its basic structure is as follows Figure 1As shown, it includes a test fixture 200 and an industrial vision device 700 (Basler industrial camera CAM-CIC-5000R-14-G, high-definition lens OPT-C0620-5M, light source YZTX3D200X29R6W-24V) connected in series by a transfer mechanism 100, a test fixture installation mechanism 300, a fastening and tightening mechanism 400, a torque test shaft mechanism 500, and a torque test positioning mechanism 600.

[0035] Test fixture 200 Figure 3 and Figure 4 As shown, the device comprises a positioning flange 210 with a central boss for securing the workpiece under test, and an annular top cover 220 secured to the positioning flange. The central boss of the positioning flange has adaptable structures corresponding to the components of the torque test shaft mechanism 500 and the fixture installation mechanism 300. Specifically, the upper end surface square opening 213 of the central boss of the positioning flange 210 serves as the interface between the test fixture and the torque test shaft 514, while the two side openings 214 serve as the interface between the test fixture and the clamping jaws 321. A bolt assembly 230 secures the test fixture 200 to the sealing element 810 of the workpiece under test. Initially, the device is placed on the fixture transfer mechanism of the test fixture installation mechanism 300. An anti-slip sealing ring 211 is provided at the bottom of the positioning flange 210 to increase contact friction with the end surface of the sealing element 810 of the workpiece under test and prevent slippage. Furthermore, a locating pin 212 provided at the bottom of the positioning flange 210 serves to position the test fixture 200 relative to the workpiece under test.

[0036] The transfer mechanism 100 is as follows Figure 2As shown, its basic structure includes a transfer base plate 112 that forms a moving pair with two X-direction guide rails 113 and 114. The transfer base plate 112 is equipped with a positioning base plate 142 that forms a lifting and lowering moving pair. The positioning base plate 142 is equipped with a left positioning plate 132 and a right positioning plate 131 that form a moving pair with the guide rails 134. The positioning base plate 142 also forms a rotating pair with a rotating support plate 121 located between the left and right positioning plates 132 and 131. The transfer mechanism 100 is mounted on the device platform and is used to transfer the tested workpiece along the X-axis to various workstations. It includes an X-axis moving mechanism, a rotating mechanism, a positioning and clamping mechanism 130, and a lifting mechanism. The electric cylinder 111 of the X-axis moving mechanism drives the transfer base plate 112 along the X-direction guide rails 113 and 114 to achieve arbitrary X-axis position movement. The rotating mechanism's rotary motor 122 is fixed below the positioning base plate 142. The rotary motor 122 drives the rotating support plate 121 to rotate and adjust the angle of the tested workpiece. The cylinders 133 of the positioning and clamping mechanism drive the left and right positioning plates 132 and 131 to move synchronously along two sets of guide rails 134 mounted on the positioning base plate 142, achieving the clamping and releasing functions. A pair of cylinders 141 of the lifting mechanism are fixed below the transfer base plate 112. Cylinders 141 push the positioning and clamping mechanism on the positioning base plate 142 to achieve Z-axis elevation.

[0037] Test fixture installation mechanism 300 such as Figure 5 As shown, the mounting support plate 350 supported by two side pillars 360 forms a mounting gantry structure that spans the two X-guide rails 113 and 114. The mounting support plate 350 is equipped with first horizontal guide rails 332 and 333 and a first Z-axis moving mechanism that forms a moving pair with the mounting support plate 350. The lower end of the Z-axis moving mechanism is equipped with an openable and closable clamping claw 321 located below the mounting support plate 350. A tool transfer mechanism consisting of a tool transfer plate 341, a cylinder 342, and a bracket 343 is mounted on one side of the pillar. The test tool installation mechanism 300 is installed on the device platform via the mounting support plate 350 and pillars 360 and is used for storing, grabbing, and installing test tooling. Specifically, it includes a Z-axis moving mechanism, a clamping claw mechanism, a Y-axis moving mechanism, a tool transfer mechanism, the mounting support plate 350, and pillars 360. The Y-axis moving mechanism is mounted above the mounting support plate 350. The cylinder 331 drives the flat plate 313 to move along the guide rails 332 and 333 arranged in the Y direction. The electric cylinder 311 of the Z-axis moving mechanism drives the clamping mechanism to move up and down along the guide rod 312, thereby enabling the clamping mechanism to move in the Y and Z directions. The cylinder 322 of the clamping mechanism drives the opening and closing of the clamping jaws 321. The tooling transfer mechanism includes a tooling transfer plate 341, a cylinder 342, and a bracket 343. The bracket 343 is fixed to the support 360. The tooling transfer plate 341 is provided with two tooling placement spaces. The cylinder 342 drives the tooling transfer plate 341 to move in the X direction, placing the tooling in the gripping position.

[0038] Tightening mechanism 400 as Figure 6 As shown, a fixed support plate 420 supported by two columns 410 on either side forms a tightening gantry structure spanning two X-direction guide rails 113 and 114. A second Z-axis movable mechanism, capable of pressing the workpiece under test, is mounted on one side of the central portion of the fixed support plate 420. Furthermore, the fixed support plate 420 is equipped with a second horizontal guide rail 442 and a tightening gun distance adjustment mechanism that forms a movable pair with the second horizontal guide rail 442. The tightening gun distance adjustment mechanism has liftable tightening guns (Danikor PTC-ASF-0120N-0-H10-030 model) 451 and 452 mounted at its lower end. Specifically, the tightening mechanism 400 comprises columns 410, a fixed support plate 420, a second Z-axis movable mechanism, a tightening gun distance adjustment mechanism, and a tightening gun assembly. Column 410 and fixed support plate 420 are mounted on the device platform. A second Z-axis movement mechanism secures an electric cylinder 432 above fixed support plate 420 via a support 431. Electric cylinder 432 drives plate 433 along the Z-axis, adjusting the Z-axis position of the tightening gun. A pressure plate 434, secured beneath plate 433, moves with it along the second Z-axis to prevent the workpiece being lifted during tightening. The tightening gun distance adjustment mechanism's guide rail 442 is mounted on plate 433 along the Y-axis. Cylinder 441 drives large tightening gun supports 443 and 444 to adjust the Y-axis distance between them. The tightening gun group consists of a tightening gun 451, a tightening gun 452, a small tightening gun support 453, a small tightening gun support 454, a cylinder 455, and a cylinder 456. The tightening gun 451 and the tightening gun 452 are respectively fixed to the small tightening gun support 453 and the small tightening gun support 454. The cylinders 455 and the cylinders 456 are installed on the inner sides of the large supports 443 and the large supports 444 along the Z direction, driving the small supports 453 and the small supports 454 to move along the Z axis direction to meet the lifting and lowering of the tightening guns 451 and the tightening guns 452 during the tightening process of the screw group.

[0039] Torque test shaft mechanism 500 Figure 7 As shown, the third Z-axis moving mechanism is mounted on the other side of the fixed support plate 420 via a support 530. The Z-axis moving mechanism is equipped with a drive shaft 514 for applying a predetermined torque to the workpiece being tested, as well as a torque sensor 512 and an angle sensor 513. Specifically, the torque test shaft mechanism 500 is fixed above the support plate 420 via the support 530 and is installed back-to-back with the tightening mechanism 400. The electric cylinder 521 of the third Z-axis moving mechanism 520 drives the torque test shaft support 522 to move along the Z-axis direction. The torque test shaft is fixed to the torque test shaft support 522. The motor 511 drives the shaft 514 to apply a predetermined torque to the workpiece being tested. The torque sensor 512 is used to detect the torque value of the shaft 514, and the angle sensor 513 is used to detect the angular change of the shaft 514.

[0040] Torque test positioning mechanism 600 Figure 8 、 Figure 9 As shown, the device is mounted on the platform via legs 620 and a flat plate 610, comprising a third gantry structure formed by the legs 620 and the flat plate 610 on both sides. The flat plate 610 is equipped with an annular, liftable positioning plate 633 and a positioning plate 643, coaxially mounted below the drive shaft 514, to limit the rotation of the internal gear sleeve 820 of the tested workpiece. To accommodate different workpiece sizes, two sizes of positioning plates are provided. The lower ends of the positioning plates 633 and 643 are respectively provided with four positioning pins 634 and 644, which engage with through-holes in the positioning flange surface of the internal gear sleeve. Cylinders 631 and 632 fixed to the flat plate 610 drive the positioning plate 633 to rise and fall along the Z-axis, while cylinders 641 and 642 fixed to the flat plate drive the positioning plate 643 to rise and fall along the Z-axis.

[0041] The industrial vision device 700 is used to identify the state angles of the tested workpiece 800 and the test fixture 200, thereby guiding the rotation mechanism and shaft 514 to adjust the corresponding angles. This embodiment can be equipped with a conventional control system, including a motion control module, a vision module, a detection module, and a storage module. The motion control module is used to control the motion sequence, position, and stroke of each mechanism; the vision module feeds back the product angular position detected by the vision system to the motion control system, guiding each mechanism to adjust the product state; the detection module is used to calculate and process and determine the detection results; and the storage module is used to store product parameters, equipment parameters, measurement results, etc.

[0042] The specific operation steps of this embodiment are as follows:

[0043] 1. The transfer base plate 112 moves along the X-axis to the position directly below the industrial vision device 700 and the workpiece 800 to be tested is loaded.

[0044] 2. The industrial vision device 700 identifies the angle between the mating surface of the sealing element 810 and the test fixture 200, the rotating mechanism rotates to adjust the angle, and the positioning and clamping mechanism 130 clamps the outer circle of the tested workpiece 800.

[0045] 3. The tooling transfer plate 341 moves along the X-axis to move the corresponding model test tooling 200 to the gripping position of the clamping mechanism.

[0046] 4. The gripper mechanism first moves along the Y axis to just above the tooling grabbing position, then moves down along the Z axis. After grabbing the test tooling 200, it first moves up along the Z axis, and then moves along the Y axis to the tooling installation position.

[0047] 5. The transfer base plate 112 moves along the X-axis to the position directly below the test fixture installation mechanism 300 .

[0048] 6. The clamping mechanism moves down along the Z axis to install the test fixture 200 on the sealing element 810.

[0049] 7. The transfer base plate 112 is moved along the X-axis to the position directly below the tightening gun assembly.

[0050] 8. Cylinder 441 drives the adjustment of the distance between tightening guns 451 and 452. After adjustment, electric cylinder 432 drives the tightening gun assembly to move and descend along the Z axis. Tightening guns 451 and 452 are capped and tightened. During the tightening process, cylinders 455 and 456 drive tightening guns 451 and 452 to the tightening height and the tooling rotation height.

[0051] 9. After tightening, the electric cylinder 432 drives the tightening gun assembly to move along the Z axis and rise to the waiting position.

[0052] 10. Move the transfer base plate 112 along the X-axis to the position directly below the industrial vision device 700 to confirm the angle of the square opening 213 on the upper end surface of the test fixture 200.

[0053] 11. The transfer base plate 112 is moved along the X-axis to the position directly below the torque test positioning mechanism 600 . The lifting mechanism lifts the positioning base plate 142 until the positioning flange surface of the inner gear sleeve 820 contacts the flat plate 610 .

[0054] 12. Depending on the product model, the cylinder drives the positioning plate 633 or the positioning plate 643 to move downward until the positioning pin 634 or the positioning pin 644 is inserted into the through hole of the positioning flange surface of the internal gear sleeve 820.

[0055] 13. The motor 511 drives the shaft 514 to rotate and adjust the angle of the square pin of the shaft 514. After the adjustment is completed, the electric cylinder 521 drives the torque test shaft support seat 522 to move and descend along the Z axis until the square pin of the shaft 514 is inserted into the square opening 213 of the test fixture.

[0056] 14. Start the test. The motor 511 drives the shaft 514 to gradually increase the torque to the workpiece 800 to a specified value. After reaching the specified torque value, maintain it for 10 seconds. The torque sensor 512 and the angle sensor 513 collect the torque value and angle change in real time.

[0057] 15. After the test is completed, the electric cylinder 521 drives the torque test shaft support 522 to move along the Z axis and rise to the waiting position. The lifting mechanism of the transfer mechanism 100 lowers the positioning base plate 142 until the positioning flange surface of the internal gear sleeve 820 is separated from the flat plate 610.

[0058] 16. The transfer base plate 112 moves along the X-axis to the position directly below the tightening gun assembly.

[0059] 17. Test fixture 200 is disassembled. Electric cylinder 432 drives the tightening gun assembly to move and descend along the Z axis. Tightening guns 451 and 452 tighten the screw caps in a forward direction with low torque, then reverse the direction to remove screw assembly 230 at a fixed angle. During the disassembly process, pneumatic cylinders 455 and 456 drive tightening guns 451 and 452 to the disassembly height and the fixture rotation height.

[0060] 18. After removing the screw assembly 230, the electric cylinder 432 drives the tightening gun assembly to move along the Z axis and rise to the waiting position.

[0061] 19. The transfer base plate 112 moves along the X-axis to the position directly below the test fixture installation mechanism 300 .

[0062] 20. The clamping mechanism moves down along the Z axis to grab the test fixture 200 from above the workpiece 800 to be tested, and the clamping mechanism moves up along the Z axis to a waiting position.

[0063] 21. The transfer base plate 112 moves along the X-axis to the position directly below the industrial vision device 700 and unloads the workpiece 800 to be tested.

[0064] The above process determines the test results based on the trend of torque and angle changes over time, such as Figure 11 As shown in the figure, the applied torque gradually reaches the required value T and is maintained for a certain period (t1-t4). If the angle change (θ2-θ1) does not exceed the required range, the test is considered qualified. Failure to apply the torque to the required value T or the angle change (θ2-θ1) exceeding the limit are considered unqualified. The measurement system compensates for the effects of the gap between the test axis and the tooling assembly and the deformation of the part itself on the angle change (0-θ1) to improve measurement accuracy.

[0065] Experiments have shown that the torque testing device of this embodiment can realize automatic detection of the fitting torque of the coupling bellows, significantly improving the accuracy and reliability of the test process and result judgment. No human intervention is required during the entire test process, and one product can be tested every 2 minutes, increasing work efficiency by about 80%. The effect is very significant, and the device has good versatility and can meet the testing needs of coupling products of various specifications.

[0066] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. A coupling sealing torque testing device, characterized by: It comprises a test fixture (200), an industrial vision device (700), a test fixture installation mechanism (300), a tightening mechanism (400), a torque test shaft mechanism (500), and a torque test positioning mechanism (600) connected in series by a transfer mechanism (100); The test fixture (200) comprises a central boss, a positioning flange (210) for fixing a workpiece to be tested, and an annular top cover (220) fixed on the positioning flange, wherein the central boss has an adapting structure respectively corresponding to the components of the torque test shaft mechanism and the fixture installation mechanism; The transfer mechanism (100) comprises a transfer base plate (112) which forms a moving pair with an X-direction guide rail (113, 114); the transfer base plate is provided with a positioning base plate (142) which forms a lifting moving pair with the transfer base plate; the positioning base plate is provided with a left positioning plate (132) and a right positioning plate (131) which form a matching moving pair, and forms a rotating pair with a rotating support plate (121) located between the left positioning plate and the right positioning plate; The test fixture installation mechanism (300) comprises a mounting gantry structure spanning the X-direction guide rail, formed by two side pillars (360) and a mounting support plate (350); the mounting support plate is provided with a first horizontal guide rail (332, 333) and a first Z-axis direction moving mechanism forming a moving pair therewith; the lower end of the first Z-axis direction moving mechanism is provided with an openable and closable clamping claw (321) located below the mounting support plate; a fixture transfer mechanism capable of placing and translating the test fixture is provided on one side of the pillar; The tightening mechanism (400) comprises a tightening gantry structure formed by two side columns (410) and a fixed support plate (420) spanning the X-direction guide rail, the fixed support plate being provided with a second horizontal guide rail (442) and a tightening gun distance adjustment mechanism forming a movable pair therewith, the lower end of the tightening gun distance adjustment mechanism being provided with a tightening gun that can be raised and lowered; a second Z-axis direction movable mechanism having a lower end capable of pressing a workpiece to be tested is provided on one side of the middle portion of the fixed support plate; The torque test shaft mechanism (500) comprises a third Z-axis direction moving mechanism installed on the other side of the fixed support plate (420), the third Z-axis direction moving mechanism being equipped with a driving shaft (514) for applying a predetermined torque to a workpiece being tested, as well as a torque sensor (512) and an angle sensor (513); The torque test positioning mechanism (600) comprises a third gantry structure consisting of two side legs (620) and a flat plate (610), wherein the flat plate is provided with an annular liftable positioning plate (633) coaxially mounted below the drive shaft (514) for limiting the rotation of the workpiece being tested.

2. The coupling sealing torque testing device according to claim 1, characterized in that: The upper end surface of the central boss of the positioning flange of the test fixture has an interface that cooperates with the torque test shaft, and the side surface has an interface that cooperates with the test fixture and the clamping claw.

3. The coupling sealing torque testing device according to claim 2, characterized in that: An anti-slip sealing ring and a positioning pin are provided at the bottom of the positioning flange.

4. The coupling sealing torque testing device according to claim 3, characterized in that: The rotating support plate is in transmission connection with a rotating mechanism fixed below the positioning base plate.

5. The coupling sealing torque testing device according to claim 4, characterized in that: The left positioning plate and the right positioning plate are respectively moved synchronously along two sets of guide rails installed on the positioning base plate to achieve clamping or loosening.

6. The coupling sealing torque testing device according to claim 5, characterized in that: The Z-axis moving mechanism has an electric cylinder that drives the clamping claw to move up and down along the guide rod.

7. The coupling sealing torque testing device according to claim 6, characterized in that: The tooling transfer plate is provided with two tooling placement spaces.

8. The coupling sealing torque testing device according to claim 7, characterized in that: The tightening gun distance adjustment mechanism comprises a pair of tightening gun large supports with adjustable spacing, and the tightening gun large supports are used to mount the tightening gun via a liftable tightening gun small support.

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