A sealing performance testing device for automobile part machining
The sealing mechanism, composed of a spiral elastic plate and an expansion cone, solves the problem of low testing efficiency for parts of different specifications, and achieves efficient and accurate sealing performance testing and part protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 百思弗(南京)金属成形科技有限公司
- Filing Date
- 2026-04-30
- Publication Date
- 2026-07-21
AI Technical Summary
Existing sealing performance testing equipment for automotive parts processing requires the replacement of plugs when dealing with electric vehicle parts of different specifications and types, resulting in low testing efficiency and high costs.
A sealing performance testing device for automotive parts processing was designed. The device uses a sealing mechanism composed of a spiral elastic plate and an expansion cone. Through the cooperation of the contact column and the expansion cone, it can adapt to the sealing of various inner diameter holes. Through the cooperation of the elastic plate and the support plate, it can support and seal the parts and avoid damage from excessive pressure.
It improves testing efficiency, reduces equipment replacement costs, ensures the accuracy of sealing performance testing and the protection of components, and prevents damage caused by excessive pressure.
Smart Images
Figure CN122430000A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of automotive component performance testing technology, and specifically to a sealing performance testing device for automotive component processing. Background Technology
[0002] Compared to traditional gasoline-powered vehicles, the core components of electric vehicles, such as the power battery pack, drive motor, electronic control box, charging port assembly, and electric drive axle, all involve high-voltage electrical systems and precision sealing structures. The quality of the sealing performance directly determines the safe operation of the entire vehicle. Currently, the industry mainly uses direct-pressure air tightness testers to test the sealing performance of electric vehicle components. The core testing principle involves filling the component with compressed air, and monitoring the pressure changes inside the component through three stages: inflation, pressure stabilization, and pressure holding, to determine whether there is a leak. The direct-pressure air tightness test steps mainly include: tooling preparation, workpiece placement and positioning, sealing of excess holes with sealing plugs, workpiece clamping and fixing, air tightness tester inflation and pressure stabilization, pressure holding test, venting and depressurization, result judgment, and workpiece removal.
[0003] Existing sealing performance testing devices for automotive parts processing are limited by the significant structural differences in electric vehicle parts. Individual workpieces typically have various openings such as process holes, wiring harness through holes, shaft holes, mounting holes, and vent holes. The number of holes that need to be sealed can range from 3 to 20, with hole diameters ranging from φ3mm to φ120mm. The number, diameter, and distribution of holes vary significantly among different workpieces. Existing clamping fixtures and plugs are mostly dedicated to single parts, resulting in poor versatility. When replacing electric vehicle parts of different specifications and types, the entire unit needs to be replaced, which not only increases equipment investment costs but also significantly reduces testing efficiency.
[0004] To address the aforementioned technical deficiencies, a solution is proposed. Summary of the Invention
[0005] This invention provides a sealing performance testing device for automotive parts processing, which solves the problem of low plug replacement efficiency caused by the large variety of automotive parts and the different inner diameters of the holes that need to be plugged.
[0006] To improve testing efficiency while supporting the workpiece and compensating for excessive pressure on automotive parts during sealing tests, this invention achieves this through the following technical solution: A sealing performance testing device for automotive parts processing, comprising a testing machine, a working chamber on the inner wall of the testing machine, a support mechanism within the working chamber for supporting the automotive parts under testing, the support mechanism comprising a spiral elastic plate, an installation groove on the spiral elastic plate, a rotating arm on the installation groove, a contact post rotatably connected to the end of the rotating arm away from the installation groove, and a sealing mechanism on the contact post for sealing non-test holes of different diameters on the automotive parts; The sealing mechanism includes an expanding cone, the inner wall of which contacts the abutting column. The expanding cone has an expansion groove, a receiving groove, and a sliding groove. A sealing cylinder is provided outside the expansion groove and is fixedly connected to the expanding cone. There are several receiving grooves arranged in a ring on the outer surface of the expanding cone. Several support plates are provided inside the receiving grooves. The support plates are equidistantly arranged in the receiving grooves and are rotatably connected to the expanding cone. An elastic plate is provided between the support plates and the expanding cone, and both ends of the elastic plate are fixedly connected to the support plate and the expanding cone, respectively.
[0007] Furthermore, an elastic element is slidably connected within the groove. The elastic element is V-shaped, and an abutment pad is fixedly connected to one end of the elastic element. The abutment pad is used to contact the outer surface of the automotive parts.
[0008] Furthermore, a vertebral sleeve is fixedly connected to the other end of the elastic member. The vertebral sleeve is fitted onto the end of the expanded vertebra away from the abutment column. A connecting rod is fixedly connected to the top of the inner wall of the vertebral sleeve, and an abutment plate is fixedly connected to the end of the connecting rod away from the vertebral sleeve.
[0009] Furthermore, the inner wall of the vertebral body sleeve contacts the support plate.
[0010] Furthermore, an embedding groove is provided at the bottom end of the outer wall of the expanded vertebral body, and a pressure sensor is fixedly installed in the embedding groove.
[0011] Furthermore, the work area is equipped with two turntables, which are arranged vertically and vertically, and both turntables are rotatably connected to the inner wall of the testing machine. Two motors are fixedly installed on the top of the turntable located above. The output end of the motor is fixedly connected to a lead screw. The two lead screws are both vertically set and rotatably connected between the two turntables. Sliders are threaded onto the lead screws. Connecting plates are provided at the opposite ends of the two sliders. The upper connecting plate is fixedly connected to the slider, and the lower connecting plate is in contact with the slider. Both connecting plates are sleeved on the lead screw, and there is a gap between the inner wall of the connecting plate and the lead screw.
[0012] Furthermore, the spiral elastic plate is disposed between the two connecting plates, and both ends of the spiral elastic plate are fixedly connected to the two connecting plates respectively.
[0013] Furthermore, an installation rod is inserted into the installation groove, and the installation rod is fixedly installed to the spiral elastic plate by a locking nut. The end of the installation rod away from the installation groove is rotatably connected to the rotating arm.
[0014] The present invention has the following beneficial effects: This sealing performance testing device for automotive parts processing utilizes a flexible, mounted abutment column on a spiral elastic plate to expand the sealing cylinder in conjunction with an expanding cone. This allows the sealing mechanism to adapt to holes of various inner diameters. Simultaneously, as the abutment column pushes the expanding cone, it pushes the abutment plate, causing the cone sleeve to move inwards towards the automotive part. This releases the restraining force of the elastic plate beneath the support plate, allowing it to pop out and support the interior of the automotive part. At the same time, an elastic component gradually approaches and abuts the exterior of the automotive part, providing external support. Furthermore, the cone sleeve can be reset and the elastic plate pulled out after the test. When the pressure sensor readings differ around the expansion cone, pressure can be applied to the spiral elastic plate by moving the slider upwards. The restoring force of the spiral elastic plate strengthens the pressure exerted by the abutment column on the expanding cone, improving the sealing effect on the holes. If the automotive part is subjected to excessive pressure during the sealing test, the spiral elastic plate can compensate for the stress, preventing damage from excessive pressure.
[0015] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from another angle; Figure 3 This is a schematic diagram of the structure of the present invention, in which an installation rod passes through the installation groove; Figure 4 This is a schematic diagram of the structure of the present invention, in which a spiral elastic plate is provided between the two connecting plates; Figure 5 This is a schematic diagram of the structure of the sealing mechanism provided on the outer surface of the contact column of the present invention; Figure 6 This is a schematic diagram of the structure of the present invention, in which a contact post is rotatably connected to the end of the rotating arm away from the mounting rod; Figure 7 This is a schematic diagram of the structure of the present invention, in which a sealing cylinder is fixedly connected to the outer wall of the expandable vertebral body. Figure 8 This is a schematic diagram of the structure of the receiving groove of the present invention, in which several support plates are rotatably connected. Figure 9 This is a schematic diagram of the structure of the vertebral body sleeve of the present invention, in which a connecting rod and an elastic element are fixedly connected to the inner wall of the sleeve. Figure 10 This is a schematic diagram of the structure in which an elastic sheet is fixedly connected between the support sheet and the expansion cone of the present invention; Figure 11 This is a schematic cross-sectional view of the expanded cone body of the present invention. In the diagram: 1. Testing machine; 2. Work chamber; 3. Turntable; 4. Motor; 5. Lead screw; 6. Slider; 7. Connecting plate; 8. Spiral elastic plate; 9. Mounting groove; 10. Rotating arm; 11. Locking nut; 12. Abutment column; 13. Mounting rod; 14. Expansion cone; 15. Pressure sensor; 16. Expansion groove; 17. Receiving groove; 18. Support plate; 19. Cone sleeve; 20. Connecting rod; 21. Abutment plate; 22. Elastic component; 23. Abutment pad; 24. Elastic sheet; 25. Slide groove; 26. Sealing cylinder. Detailed Implementation
[0016] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.
[0017] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.
[0018] Please see Figures 1-11 This invention provides a technical solution: a sealing performance testing device for automotive parts processing, comprising a testing machine 1, a working chamber 2 formed on the inner wall of the testing machine 1, a support mechanism provided in the working chamber 2, the support mechanism being used to support the automotive parts being tested, the support mechanism including a spiral elastic plate 8, an installation groove 9 formed on the spiral elastic plate 8, a rotating arm 10 provided on the installation groove 9, an installation rod 13 passing through the installation groove 9, the installation rod 13 being fixedly installed to the spiral elastic plate 8 by a locking nut 11, one end of the installation rod 13 away from the installation groove 9 being rotatably connected to the rotating arm 10, and one end of the rotating arm 10 away from the installation groove 9 being rotatably connected to an abutment post 12, the abutment post 12 being provided with a sealing mechanism, the sealing mechanism being used to seal non-test holes of different diameters on the automotive parts.
[0019] The test machine 1 is a direct pressure air tightness tester. Its specific structure and working principle are existing technologies. The test machine 1 is also equipped with an external control host. The motor 4 is a servo motor. Its encoder is fixed on the motor 4. The controller is installed in the control host. The control module and display module of the pressure sensor 15 are both installed in the control host. They are all existing technologies and will not be described in detail below.
[0020] The rotating arm 10 is a structure in which multiple rod sections are connected by a rotating joint, and the rotating shaft on the rotating joint is a damping rotating shaft. After determining the rotation angle, tightening the nut of the damping rotating shaft can achieve fixation.
[0021] Once the sealing condition meets the testing requirements, the testing machine 1, acting as a direct-pressure airtightness tester, injects gas at a certain pressure into the inner cavity of the automotive parts through a preset test hole to begin the sealing performance test. The control host monitors the changes in the inner cavity air pressure in real time to determine whether there is a leak in the parts. During the sealing performance test, if the air pressure in the inner cavity of the automotive parts is too high, causing the parts to show a tendency to deform, the parts will generate reverse pressure on the support plate 18. This pressure is transmitted to the spiral elastic plate 8 through the support plate 18, the expansion cone 14, and the contact column 12. The spiral elastic plate 8 adapts to the elasticity by yielding, compensating for the pressure on the automotive parts and preventing the parts from being damaged due to excessive pressure, thus protecting the workpiece.
[0022] Loosen the locking nut 11 on the mounting rod 13 in the mounting groove 9, and adjust the front-back and left-right fixed positions of the mounting rod 13 in the mounting groove 9 of the spiral elastic plate 8 so that the mounting rod 13 can drive the rotating arm 10 to align with the non-test holes in each direction. After the position is adjusted, tighten the locking nut 11 to firmly fix the mounting rod 13 and the spiral elastic plate 8 to prevent displacement during the test. At this time, rotate each section of the rotating arm 10 to adjust the overall angle and length of the rotating arm 10 so that the end of the rotating arm 10 connected to the abutment column 12 away from the mounting rod 13 is aligned with the expansion cone 14, and the two are kept in a separate contact state without being fixedly connected. After the angle is adjusted to the correct position, tighten the nut on the damping shaft to lock the angle of the rotating arm 10 and ensure that the abutment column 12 can stably push the expansion cone 14.
[0023] The sealing mechanism includes an expansion cone 14, the inner wall of which contacts the abutment post 12. The expansion cone 14 is provided with an expansion groove 16, a receiving groove 17, and a sliding groove 25. A sealing cylinder 26 is provided outside the expansion groove 16 and is fixedly connected to the expansion cone 14. There are several receiving grooves 17 arranged in a ring on the outer surface of the expansion cone 14. Several support plates 18 are provided in the receiving groove 17 and are arranged equidistantly in the receiving groove 17. The support plates 18 are rotatably connected to the expansion cone 14. An elastic plate 24 is provided between the support plates 18 and the expansion cone 14. The two ends of the elastic plate 24 are fixedly connected to the support plates 18 and the expansion cone 14, respectively.
[0024] The expansion cone 14 has a minimum outer diameter of 1mm and a maximum outer diameter of 200mm to accommodate holes of different sizes. When the hole is 3mm in diameter, the hole is blocked by the cone sleeve 19. The expansion cone 14 and the contact post 12 are in a separate contact state and are not fixedly connected.
[0025] During operation, the automotive parts to be tested are first placed stably inside the working chamber 2 of the testing machine 1. Based on the specific location, opening angle, and hole size of the non-test holes on the automotive parts to be tested, the entire blocking mechanism expansion cone 14 is first inserted into the non-test holes with the maximum opening tilted upwards.
[0026] A spring element 22 is slidably connected inside the groove 25. The spring element 22 is V-shaped. One end of the spring element 22 is fixedly connected to an abutment pad 23, which is used to contact the outer surface of the automotive parts. The other end of the spring element 22 is fixedly connected to a cone sleeve 19. The cone sleeve 19 is fitted on the end of the expanded cone 14 away from the abutment post 12. A connecting rod 20 is fixedly connected to the top of the inner wall of the cone sleeve 19. An abutment plate 21 is fixedly connected to the end of the connecting rod 20 away from the cone sleeve 19. The inner wall of the cone sleeve 19 contacts the support plate 18.
[0027] Under the pushing action of the abutment post 12, the expanding cone 14 continues to move into the hole. At this time, the abutment plate 21 at the end of the expanding cone 14 away from the abutment post 12 is subjected to the abutment force of the inner wall of the hole. The abutment plate 21 drives the connecting rod 20 fixedly connected to it to move synchronously. The connecting rod 20 drives the cone sleeve 19 to slide relative to the outer surface of the expanding cone 14. Since the cone sleeve 19 is sleeved at the end of the expanding cone 14 away from the abutment post 12, and the inner wall of the cone sleeve 19 is in contact with the support plate 18, the limiting effect of the cone sleeve 19 on the support plate 18 in the receiving groove 17 is gradually released during the sliding process. The support plate 18, which was originally squeezed by the cone sleeve 19, is elastically reset by the elastic plate 24 fixedly connected between it and the expanding cone 14, and moves from the receiving groove 18 in a ring distributed on the outer surface of the expanding cone 14. The groove 17 rotates outward and expands, and several support plates 18, which are equidistantly arranged in each groove 17, open synchronously until the ends of the support plates 18 are tightly pressed against the inner wall of the hole, forming a rigid support for the inside of the hole of the automotive part, preventing the hole from deforming during the inspection process. When the cone sleeve 19 slides along the expanding cone 14, it synchronously drives the V-shaped elastic member 22, which is fixedly connected to it, to slide along the slide groove 25 on the expanding cone 14. The contact pad 23 at one end of the elastic member 22 gradually approaches the outer surface of the automotive part as the elastic member 22 moves, until the contact pad 23 is tightly pressed against the outer surface of the part, forming an auxiliary support for the outside of the automotive part. This, together with the internal support of the support plate 18, further improves the stability of the part during the inspection process and prevents the part from shifting.
[0028] The cone sleeve 19 is made of the same material as the sealing cylinder 26, and both are made of polyurethane rubber.
[0029] An embedding groove is provided at the bottom of the outer wall of the expansion cone 14. A pressure sensor 15 is fixedly installed in the embedding groove. Two turntables 3 are provided in the working chamber 2, which are distributed vertically. Both turntables 3 are rotatably connected to the inner wall of the testing machine 1. Two motors 4 are fixedly installed at the top of the upper turntable 3. The output end of the motor 4 is fixedly connected to a lead screw 5. Both lead screws 5 are vertically set and rotatably connected between the two turntables 3. A slider 6 is threaded on the lead screw 5. A connecting plate 7 is provided at the facing ends of the two sliders 6. The upper connecting plate 7 is fixedly connected to the slider 6, and the lower connecting plate 7 is in contact with the slider 6. Both connecting plates 7 are sleeved on the lead screw 5, and there is a gap between the inner wall of the connecting plate 7 and the lead screw 5. A spiral elastic plate 8 is set between the two connecting plates 7, and both ends of the spiral elastic plate 8 are fixedly connected to the two connecting plates 7 respectively.
[0030] The turntable 3 is rotatably connected to the inner wall of the testing machine 1 by being partially embedded in the cylinder. This rotatable connection method is existing technology.
[0031] When the contact post 12 contacts the expansion cone 14, the motor 4 located on the right side is activated. The motor 4 drives the lead screw 5 to rotate, and the slider 6 on the lead screw 5 generates a threaded transmission with the lead screw 5. Both sliders 6 move downward, and the connecting plate 7 and the spiral elastic plate 8 move downward. The mounting rod 13, the locking nut 11, the rotating arm 10, and the contact post 12 all move downward. The contact post 12 generates a pushing force on the expansion cone 14, pushing the expansion cone 14 to slowly extend into the non-test hole to be sealed in the automotive part, realizing the sealing mechanism and the initial docking with the hole to be sealed. The expansion groove 16 opened on the expansion cone 14 cooperates with the sealing cylinder 26 sleeved outside the expansion groove 16. The sealing cylinder 26 is made of polyurethane rubber. During the process of the expansion cone 14 extending into the hole, the sealing cylinder 26 undergoes elastic deformation under the squeezing action of the inner wall of the hole, tightly fitting the inner wall of the hole, realizing the sealing of the non-test hole, avoiding gas leakage from the non-test hole during the test, and ensuring the accuracy of the sealing performance test.
[0032] A pressure sensor 15, installed in a groove at the bottom of the outer wall of the expansion cone 14, detects the pressure between the expansion cone 14 and the inner wall of the hole in real time and transmits the detection data to the display module of the control host in real time. When the pressure sensor 15 detects uneven circumferential pressure on the expansion cone 14, it indicates that the sealing cylinder 26 is not in good contact with the inner wall of the hole, which may pose a sealing risk. At this time, the control host controls the motor 4 to continue driving the slider 6 to move down. The slider 6 applies downward pressure to the spiral elastic plate 8, and the spiral elastic plate 8 undergoes elastic deformation. The resulting restoring force is transmitted to the abutment post 12, which enhances the pressing force of the abutment post 12 on the expansion cone 14, allowing the expansion cone 14 to extend further into the hole. The sealing cylinder 26 further deforms, improving the contact with the inner wall of the hole and ensuring the sealing effect.
[0033] Working Principle: During operation, the automotive parts to be tested are first placed stably inside the working chamber 2 of the testing machine 1. Based on the specific location, opening angle, and diameter of the non-test holes on the automotive parts, the entire blocking mechanism expansion cone 14 is inserted into the non-test holes with its maximum opening tilted upwards. The locking nut 11 on the mounting rod 13 in the mounting groove 9 is loosened. The position of the mounting rod 13 within the mounting groove 9 of the spiral elastic plate 8 is adjusted so that the mounting rod 13 can drive the rotating arm 10 to align with the non-test holes in various directions. After the position adjustment is complete, the locking nut 11 is tightened to firmly fix the mounting rod 13 to the spiral elastic plate 8, preventing displacement during testing. At this point, the sections of the rotating arm 10 can be rotated to adjust the position of the rotating arm 10. The overall angle and length of the rotating arm 10 are adjusted so that the end of the abutment column 12 connected to the end of the rotating arm 10 away from the mounting rod 13 is aligned with the expansion cone 14, and the two are kept in a separate contact state without being fixedly connected. After the angle is adjusted to the correct position, the nut on the damping shaft is tightened to lock the angle of the rotating arm 10, ensuring that the abutment column 12 can stably push the expansion cone 14. When the abutment column 12 contacts the expansion cone 14, the motor 4 located on the right is activated. The motor 4 drives the lead screw 5 to rotate, and the slider 6 on the lead screw 5 generates a threaded transmission with the lead screw 5. Both sliders 6 move downward, and the connecting plate 7 and the spiral elastic plate 8 move downward. The mounting rod 13, the locking nut 11, the rotating arm 10, and the abutment column 12 all move downward, and the abutment column 12 pushes the expansion cone 14. The cone 14 generates a pushing force, propelling the expanding cone 14 slowly into the non-test hole to be sealed in the automotive component, achieving initial docking between the sealing mechanism and the hole. Simultaneously, the expansion groove 16 on the expanding cone 14 cooperates with the sealing cylinder 26 fitted outside the expansion groove 16. The sealing cylinder 26 is made of polyurethane rubber. As the expanding cone 14 extends into the hole, the sealing cylinder 26 undergoes elastic deformation under the pressure of the hole's inner wall, tightly fitting the inner wall of the hole to seal the non-test hole, preventing gas leakage during testing and ensuring the accuracy of the sealing performance test. Under the pushing action of the abutment post 12, the expanding cone 14 continues to move into the hole. At this point, the end of the expanding cone 14 away from the abutment post 12... The contact plate 21 is resisted by the inner wall of the hole. The contact plate 21 drives the connecting rod 20, which is fixedly connected to it, to move synchronously. The connecting rod 20 drives the cone sleeve 19 to slide relative to the outer surface of the expanded cone 14. Since the cone sleeve 19 is fitted on the end of the expanded cone 14 away from the contact post 12, and the inner wall of the cone sleeve 19 is in contact with the support piece 18, the cone sleeve 19 gradually releases its limiting effect on the support piece 18 in the receiving groove 17 during the sliding process. The support piece 18, which was originally squeezed by the cone sleeve 19, rotates outward from the receiving groove 17, which is distributed in a ring on the outer surface of the expanded cone 14, under the elastic reset action of the elastic piece 24 fixedly connected between it and the expanded cone 14. Several support pieces 18, which are equidistantly arranged in each receiving groove 17, open synchronously.Until the end of the support plate 18 is tightly pressed against the inner wall of the hole, forming a rigid support for the inside of the hole of the automotive part, preventing the hole from deforming during the inspection process, the cone sleeve 19 slides along the expansion cone 14, simultaneously driving the V-shaped elastic member 22 fixedly connected to it to slide along the slide groove 25 on the expansion cone 14. The contact pad 23 at one end of the elastic member 22 gradually approaches the outer surface of the automotive part as the elastic member 22 moves, until the contact pad 23 is tightly pressed against the outer surface of the part, forming an auxiliary support for the outside of the automotive part. This, together with the internal support of the support plate 18, further improves the stability of the part during the inspection process and prevents the part from shifting. The pressure sensor 15, installed in the groove at the bottom of the outer wall of the expansion cone 14, detects the expansion in real time. The pressure between the expansion cone 14 and the inner wall of the hole is measured, and the detection data is transmitted to the display module of the control host in real time. When the pressure sensor 15 detects uneven circumferential pressure on the expansion cone 14, it indicates that the sealing cylinder 26 is not sufficiently fitted to the inner wall of the hole, posing a potential sealing hazard. At this time, the control host controls the motor 4 to continue driving the slider 6 to move downward. The slider 6 applies downward pressure to the spiral elastic plate 8, causing the spiral elastic plate 8 to undergo elastic deformation. The resulting restoring force is transmitted to the abutment column 12, enhancing the pressing force of the abutment column 12 on the expansion cone 14, allowing the expansion cone 14 to extend further into the hole. The sealing cylinder 26 further deforms, improving the fit with the inner wall of the hole and ensuring the sealing effect. When the sealing state meets the detection requirements, the testing machine 1 acts as a direct pressure airtightness tester. Gas at a certain pressure is injected into the inner cavity of the automotive component through a preset test hole to begin the sealing performance test. The main control unit monitors the changes in the inner cavity air pressure in real time to determine whether there is a leak in the component. During the sealing performance test, if the air pressure in the inner cavity of the automotive component is too high, causing the component to show a tendency to deform, the component will generate reverse pressure on the support plate 18. This pressure is transmitted to the spiral elastic plate 8 through the support plate 18, the expansion cone 14, and the contact post 12. The spiral elastic plate 8 adapts to the elasticity of the component by elastically yielding, compensating for the pressure on the automotive component and preventing the component from being damaged due to excessive pressure, thus protecting the workpiece. After the test is completed, if the sealing performance of the component is qualified, the main control unit controls the motor 4 to reverse, and the output end of the motor 4 drives... The moving screw 5 rotates in the reverse direction, driving the slider 6 to move vertically upward along the screw 5. The slider 6 drives the connecting plate 7 and the spiral elastic plate 8 to move upward synchronously. The contact post 12 moves upward with the spiral elastic plate 8 and gradually separates from the expansion cone 14. The contact post 12 no longer applies a pushing force to the expansion cone 14. At this time, the elastic element 22 is pulled, and the elastic element 22 slides in the slide groove 25. The cone sleeve 19 slides with the elastic element 22, re-compressing the support plate 18, so that the support plate 18 overcomes the elastic force of the elastic plate 24 and gradually retracts into the receiving groove 17. At the same time, the expansion cone 14 is finally manually pulled out from the hole, completing a single automotive component sealing performance test. Subsequently, the qualified component can be taken out and the next component to be tested can be placed in it. The above operation is repeated to achieve batch testing.
[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. A sealing performance testing device for automotive parts processing, comprising a testing machine (1), wherein a working chamber (2) is provided on the inner wall of the testing machine (1), characterized in that: The work area (2) is equipped with a support mechanism for supporting automotive parts during testing. The support mechanism includes a spiral elastic plate (8), on which an installation groove (9) is provided. A rotating arm (10) is provided on the installation groove (9). A contact post (12) is rotatably connected to one end of the rotating arm (10) away from the installation groove (9). A sealing mechanism is provided on the contact post (12) for sealing non-test holes of different diameters on automotive parts. The sealing mechanism includes an expansion cone (14), the inner wall of which is in contact with the abutment column (12). The expansion cone (14) is provided with an expansion groove (16), a receiving groove (17) and a sliding groove (25). A sealing cylinder (26) is provided outside the expansion groove (16). The sealing cylinder (26) is fixedly connected to the expansion cone (14). The receiving groove (17) is a plurality of such grooves and is distributed in a ring on the outer surface of the expansion cone (14). A plurality of support plates (18) are provided inside the receiving groove (17). The plurality of support plates (18) are arranged equidistantly in the receiving groove (17). The plurality of support plates (18) are rotatably connected to the expansion cone (14). An elastic plate (24) is provided between the plurality of support plates (18) and the expansion cone (14). The two ends of the elastic plate (24) are fixedly connected to the support plate (18) and the expansion cone (14) respectively.
2. The sealing performance testing device for automotive parts processing according to claim 1, characterized in that: An elastic element (22) is slidably connected in the groove (25). The elastic element (22) is V-shaped. One end of the elastic element (22) is fixedly connected to an abutment pad (23). The abutment pad (23) is used to contact the outer surface of the automotive parts.
3. The sealing performance testing device for automotive parts processing according to claim 2, characterized in that: The other end of the elastic element (22) is fixedly connected to a vertebral sleeve (19). The vertebral sleeve (19) is fitted on the end of the expanded vertebra (14) away from the abutment column (12). A connecting rod (20) is fixedly connected to the top of the inner wall of the vertebral sleeve (19). An abutment plate (21) is fixedly connected to the end of the connecting rod (20) away from the vertebral sleeve (19).
4. The sealing performance testing device for automotive parts processing according to claim 3, characterized in that: The inner wall of the vertebral sleeve (19) is in contact with the support plate (18).
5. The sealing performance testing device for automotive parts processing according to claim 1, characterized in that: An embedding groove is provided at the bottom of the outer wall of the expansion cone (14), and a pressure sensor (15) is fixedly installed in the embedding groove.
6. The sealing performance testing device for automotive parts processing according to claim 1, characterized in that: The workroom (2) is equipped with two turntables (3) arranged vertically, and both turntables (3) are rotatably connected to the inner wall of the testing machine (1). Two motors (4) are fixedly installed on the top of the turntable (3) located above. The output end of the motor (4) is fixedly connected to a lead screw (5). The two lead screws (5) are both vertically set and rotatably connected between the two turntables (3). A slider (6) is threaded on the lead screw (5). A connecting plate (7) is provided at the opposite end of the two sliders (6). The upper connecting plate (7) is fixedly connected to the slider (6), and the lower connecting plate (7) is in contact with the slider (6). Both connecting plates (7) are sleeved on the lead screw (5), and there is a gap between the inner wall of the connecting plate (7) and the lead screw (5).
7. The sealing performance testing device for automotive parts processing according to claim 6, characterized in that: The spiral elastic plate (8) is disposed between two connecting plates (7), and both ends of the spiral elastic plate (8) are fixedly connected to the two connecting plates (7) respectively.
8. The sealing performance testing device for automotive parts processing according to claim 7, characterized in that: An installation rod (13) is inserted into the installation groove (9). The installation rod (13) is fixedly installed to the spiral elastic plate (8) by a locking nut (11). The end of the installation rod (13) away from the installation groove (9) is rotatably connected to the rotating arm (10).