3D printing part air source leak detection tooling

Abstract

The utility model relates to 3D printing technical field especially 3D printing spare and part air source leak detection frock, including work bench, the outside top of work bench is provided with fixed assembly, the middle of work bench top is provided with the through groove, the cavity is opened in work bench, the through groove is linked with the cavity, the movable rod is slidably arranged in the through groove, the movable rod outside top is provided with a plurality of communication grooves, the movable rod bottom extends to the cavity and is installed with the sealing seat, the sealing seat bottom is provided with reset mechanism, reset mechanism is installed in the cavity, work bench top one side is provided with pressure gauge, work bench one side is provided with the communicating pipe. The device passes through fixed assembly and fixes the spare and part on the work bench, passes through the movable rod and is linked with the cavity in the work bench with the spare and part, lets the gas in the cavity can enter the inside of spare and part, judges whether there is the air leakage hidden danger, the whole process is completed in the closed environment, effectively reduces the pollution that spare and part receives.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and in particular to a gas source leak testing fixture for 3D printed parts. Background Technology

[0002] In industrial production, 3D-printed parts must undergo rigorous airtightness testing before being put into use to ensure that their internal structure is free of leaks and meets performance and safety requirements. Currently, the most common airtightness testing method is the water test.

[0003] While water testing is intuitive, the process requires thorough cleaning and drying of the parts after testing, making it cumbersome. This is especially true for complex 3D printed parts, where residual moisture is difficult to remove, potentially contaminating delicate components. Therefore, the industry urgently needs a testing solution that can prevent component contamination. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as water testing, which, although intuitive, requires thorough cleaning and drying of the parts after testing, making the process cumbersome. In particular, for complex 3D printed parts, residual moisture is difficult to remove, and water stains may contaminate precision parts. Therefore, this invention proposes a 3D printed parts air source leak testing fixture.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: Design a 3D printed parts air source leak testing fixture, including a worktable, a fixing component on the top outer side of the worktable, a through groove in the middle of the top of the worktable, a cavity in the worktable connected to the through groove, a moving rod slidably disposed in the through groove, several connecting grooves on the top outer side of the moving rod, a sealing seat installed at the bottom of the moving rod extending into the cavity, a reset mechanism at the bottom of the sealing seat installed in the cavity, a pressure gauge on one side of the top of the worktable, and a connecting pipe on one side of the worktable.

[0006] Preferably, a second sealing gasket is provided on the outer side of the top of the sealing seat.

[0007] Preferably, the reset mechanism includes a retainer fixed in the cavity, a long rod slidably disposed on the retainer, the top of the long rod being connected to the bottom of the sealing seat, an elastic element being installed at the bottom of the sealing seat, and one end of the elastic element being fixed to the retainer.

[0008] Preferably, the elastic element is a cylindrical spring and is sleeved on the outside of the long rod, and the outside of the long rod is provided with a wear-resistant coating.

[0009] Preferably, the top of the workbench is provided with a placement groove, a limit ring is installed on the top of the placement groove, a lifting seat is slidably disposed in the placement groove, a plurality of through holes are provided on the placement groove, the plurality of through holes are all connected to the cavity, and a sealing ring is provided on the contact surface of the lifting seat.

[0010] Preferably, the top of the lifting seat is provided with a first sealing gasket.

[0011] The 3D printed parts air source leak testing fixture proposed in this utility model has the following advantages: 1. Gas enters the bottom of the component through the connecting groove in the cavity and seeps into its interior. After maintaining this state for a certain period of time, the change in the pressure gauge reading can be observed to determine whether there is a potential for air leakage in the component. The entire process is completed in a relatively closed environment, effectively reducing the possibility of contamination of the component. 2. When the parts are not fixed, the air pressure in the cavity enters the placement slot through the through hole, pushing the lifting seat upward so that its top edge abuts the bottom of the limiting ring, thereby putting the moving rod in a protected state; 3. After the components are placed, the lifting seat can enhance the stability of the placement; when the fixing component is pressed, the pressure it applies to the components causes the lifting seat to move down and form a top seal. Subsequently, the components further squeeze the moving rod, which drives the sealing seat to compress the elastic element, so that the connecting groove is connected to the cavity, and the gas can enter the components for testing. While judging the airtightness, the gas leakage is significantly reduced. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a 3D printed parts air source leak testing fixture proposed in this utility model.

[0013] Figure 2 This is a structural schematic diagram of a cross-sectional view of a 3D printed parts air source leak testing fixture proposed in this utility model.

[0014] Figure 3 for Figure 2 A magnified view of a portion at point A.

[0015] Figure 4 This is a partial structural diagram of a 3D printed parts air source leak testing fixture proposed in this utility model.

[0016] Figure 5 This is a partial structural explosion diagram of a 3D printed parts gas source leak testing fixture proposed in this utility model.

[0017] In the diagram: 1. Workbench; 2. Fixed assembly; 3. Through groove; 4. Cavity; 5. Moving rod; 6. Connecting groove; 7. Sealing seat; 8. Pressure gauge; 9. Connecting pipe; 10. Retainer; 11. Long rod; 12. Elastic element; 13. Placement groove; 14. Limiting ring; 15. Lifting seat; 16. Through hole; 17. First sealing gasket; 18. Second sealing gasket. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Example 1: Refer to Figure 1-5 A leak testing fixture for air source of 3D printed parts includes a worktable 1, a fixing component 2 on the top outer side of the worktable 1, a through groove 3 in the middle of the top of the worktable 1, a cavity 4 in the worktable 1 connected to the through groove 3, a moving rod 5 slidably disposed in the through groove 3, several connecting grooves 6 on the top outer side of the moving rod 5, a sealing seat 7 installed in the cavity 4 at the bottom of the moving rod 5, a reset mechanism at the bottom of the sealing seat 7, the reset mechanism installed in the cavity 4, a pressure gauge 8 on one side of the top of the worktable 1, a connecting pipe 9 on one side of the worktable 1, and a retainer 10 fixed in the cavity 4. A long rod 11 is slidably disposed on the retainer 10, the top of the long rod 11 is connected to the bottom of the sealing seat 7, an elastic element 12 is installed at the bottom of the sealing seat 7, and one end of the elastic element 12 is fixed to the retainer 10.

[0020] Usage: Place the component to be tested on the moving rod 5, activate the fixing component 2, and the fixing component 2 will press the component tightly, causing the component to exert pressure on the moving rod 5. The moving rod 5 will exert pressure on the sealing seat 7, and the sealing seat 7 will exert pressure on the elastic element 12, causing the elastic element 12 to compress elastically, causing the top of the moving rod 5 to retract into the through groove 3, that is, the top surface of the bottom worktable 1 of the component is squeezed together, forming a testing space. At this time, the gas in the cavity 4 will reach the bottom area of ​​the component through several connecting grooves 6 on the moving rod 5, and then seep into the interior of the component. After a period of time, by observing the change in the value of the pressure gauge 8, it can be determined whether there is a potential for air leakage in the component, thus making the component less susceptible to contamination during the testing process.

[0021] Example 2: An optimization based on Example 1, with reference to... Figure 1-5A second sealing gasket 18 is provided on the outer side of the top of the sealing seat 7, thereby increasing the sealing performance of the sealing seat 7 to the through groove 3 and reducing the probability of gas leakage when the device is not in use; the elastic element 12 is set as a cylindrical spring and is sleeved on the outer side of the long rod 11. The outer side of the long rod 11 is provided with a wear-resistant coating, which is formed by spraying ceramic particles, making the long rod 11 more durable. After the elastic element 12 is sleeved on the long rod 11, the elastic element 12 is not easy to bend to the side, thereby extending the service life of the elastic element 12.

[0022] Example 3: In Example 1, after the moving rod 5 extends out of the worktable 1, the parts placed on the worktable 1 are prone to tipping over, thus increasing the difficulty of fixing the parts with the fixing component 2. Based on Example 1, optimizations are made, referring to... Figure 1-5 The top of the workbench 1 is provided with a placement groove 13, and a limit ring 14 is installed on the top of the placement groove 13. A lifting seat 15 is slidably arranged in the placement groove 13. Several through holes 16 are provided on the placement groove 13, and the several through holes 16 are all connected to the cavity 4. A sealing ring is provided on the contact surface of the lifting seat 15, and a first sealing gasket 17 is provided on the top of the lifting seat 1.

[0023] Usage process: When the parts are not fixed on the workbench 1, the air pressure in the cavity 4 will enter the placement groove 13 through several through holes 16, causing the lifting seat 15 to move in the placement groove 13, thereby pressing the top edge of the lifting seat 15 against the bottom of the limiting ring 14, so that the moving rod 5 is in a protected state. The component is placed on the lifting seat 15, which makes the component more stable. After the fixing component 2 applies pressure, the pressure generated by the fixing component 2 on the component forms a certain sealing effect on the top of the lifting seat 15. After the lifting seat 15 moves a certain distance in the placement groove 13, the component will squeeze the moving rod 5, which will cause the moving rod 5 to squeeze the elastic element 12 with the sealing seat 7, so that the connecting groove 6 on the moving rod 5 is connected to the cavity 4. This allows the gas in the cavity 4 to reach the component, thereby greatly reducing the amount of gas escaping while judging whether the component is leaking.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A 3D printing parts air source leak detection tooling, comprising a workbench (1), characterized in that, A fixing component (2) is provided on the top of the outer side of the workbench (1). A through groove (3) is provided in the middle of the top of the workbench (1). A cavity (4) is provided inside the workbench (1). The cavity (4) is connected to the through groove (3). A moving rod (5) is slidably provided inside the through groove (3). Several connecting grooves (6) are provided on the top of the outer side of the moving rod (5). A sealing seat (7) is installed at the bottom of the moving rod (5) inside the cavity (4). A reset mechanism is provided at the bottom of the sealing seat (7). The reset mechanism is installed inside the cavity (4).

2. The 3D printed part gas source leak hunting tooling of claim 1, wherein, A second sealing gasket (18) is provided on the outer side of the top of the sealing seat (7).

3. The 3D printed part gas source leak hunting tooling of claim 1, wherein, The reset mechanism includes a retainer (10) fixed in the cavity (4), a long rod (11) is slidably arranged on the retainer (10), the top of the long rod (11) is connected to the bottom of the sealing seat (7), an elastic element (12) is installed at the bottom of the sealing seat (7), and one end of the elastic element (12) is fixed on the retainer (10).

4. The 3D printed part gas source leak hunting tooling of claim 3, wherein, The elastic element (12) is configured as a cylindrical spring and is sleeved on the outside of the long rod (11), and the outside of the long rod (11) is provided with a wear-resistant coating.

5. The 3D printed part gas source leak hunting tooling of claim 1, wherein, The workbench (1) is provided with a placement groove (13) on the top. A limit ring (14) is installed on the top of the placement groove (13). A lifting seat (15) is slidably provided in the placement groove (13). Several through holes (16) are provided on the placement groove (13). Several through holes (16) are all connected to the cavity (4).

6. The 3D printed part gas source leak hunting tooling of claim 5, wherein, The top of the lifting seat (15) is provided with a first sealing gasket (17).

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