Multi-station air tightness testing device

Abstract

A multi-station air tightness testing device is characterized in that the device comprises a complete machine bottom plate, a testing jig unit, a jig moving base, an air supply unit, an electromagnetic valve unit and a flowmeter unit, the jig moving base is fixedly arranged on the complete machine bottom plate, the testing jig unit is installed on the jig moving base, and the flowmeter unit is installed on the testing jig unit. The gas supply unit is connected to the test fixture unit through a gas circuit of the electromagnetic valve unit, a flowmeter unit is arranged in the middle of the gas circuit below the gas supply unit, a plurality of test stations are arranged in the fixture test unit, and the flowmeter unit comprises flowmeters of which the number is equal to that of the test stations. According to the multi-station air tightness testing device, the air flow testing effect is improved by improving the structure of the testing seat assembly, so that the testing device has adaptation universality for different parts, as long as the parts are shaft-like and pipe-like parts, the parts can be adapted and subjected to air tightness testing, meanwhile, a plurality of stations are integrated, and the testing efficiency is improved. And a plurality of pointer type display gas meters are correspondingly arranged at striking positions behind the stations, so that the existence of good products and defective products can be directly judged.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a device for testing the air tightness of a series of automobile parts.

Background Art

[0002] As a core component of modern automobiles, the performance of the ABS anti-lock braking system has a great impact on the life safety of drivers. When there is a fault, it will pose a hidden danger to people's life safety. In the ABS anti-lock system, there is a certain type of shaft series parts of automobiles. The air circuits of different specifications need to meet strict air flow requirements. Therefore, after machining, the air tightness of the parts needs to be tested. Generally, for air tightness testing, the parts are loaded into a sealing fixture, pressurized and ventilated, and the automatic display value of the flowmeter is detected to identify the air leakage of the parts and the approximate air leakage volume.

[0003] The existing testing devices need to design and manufacture special sealing fixtures, which are dedicated to specific molds, increasing the cost investment of testing and lacking universality. In addition, the existing air tightness testing devices use complex measuring meters, and the reading process takes time, increasing the training difficulty of operators and requiring a high level of proficiency for operators. Moreover, in the process of sequential operation at a single station, there is also a problem of low efficiency.

Summary of the Invention

[0004] The utility model proposes a solution to the above problems, which can improve the air flow test effect, make the testing device have the universality of adapting to different parts, can match different parts for air tightness testing, and integrates multiple stations. At the prominent positions corresponding to the stations, a plurality of pointer-type air meters are provided. There is no need to read the meters. Just look at the offset position of the pointers at a glance, and the conclusion can be obtained through visual comparison without confirmation and discrimination for reading.

[0005] A multi-station air tightness testing device according to the utility model is characterized in that the device includes an integral machine base plate, a test fixture unit, a fixture moving base, a gas supply unit, a solenoid valve unit, and a flowmeter unit. The fixture moving base is fixedly arranged on the integral machine base plate, the test fixture unit is installed on the fixture moving base, the gas supply unit is connected to the test fixture unit through the air path of the solenoid valve unit, a flowmeter unit is arranged in the middle of the air path below the gas supply unit, the test fixture unit includes a plurality of test stations, and the flowmeter unit includes flowmeters corresponding to the number of test stations.

[0006] The test fixture unit includes a number of test stations, and each test station includes a test seat assembly for placing workpieces, an upper pressing fixture, and a fixture cylinder for driving the upper pressing fixture to lift and press.

[0007] The test fixture unit further includes a fixture cylinder fixing bracket, and a plurality of fixture cylinders are mounted on the top of the fixture cylinder fixing bracket. The valve rod of the fixture cylinder is connected to the upper pressing fixture in the direction of the test seat.

[0008] Each test seat assembly includes a cylindrical seat body, a sealing rubber ring, an air inlet joint, and a test seat fixing plate. The cylindrical seat body is installed on the fixture moving base through the test seat fixing plate. A sealing rubber ring is provided inside the cylindrical seat body, and an air inlet joint is provided at the lower part of the cylindrical seat body.

[0009] A limiting block is provided on the side of the upper pressing fixture.

[0010] The fixture moving base includes a guide rail, a moving slider, and a moving base cylinder. The guide rail is fixed on the bottom plate of the whole machine, and the moving slider is pushed by the moving base cylinder to reciprocate below / away from the upper pressing fixture.

[0011] The device further includes an electric box, and the air supply unit and the flow meter unit are both installed and fixed on the electric box.

[0012] A solenoid valve unit is provided below the flow meter unit.

[0013] The multi-station airtightness test device involved in the present invention improves the air flow test effect by improving the structure of the test seat assembly, making the test device have adaptability and universality for different parts. As long as it is a part of the shaft body or pipe body type, it can be adapted and the airtightness test can be carried out. At the same time, multiple stations are integrated, and a plurality of pointer-type display air meters are correspondingly arranged at prominent positions behind the stations, and the qualified and unqualified products can be directly judged.

Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of a multi-station airtightness test device involved in the present invention;

[0015] Figure 2 It is a schematic diagram of the partial structure disassembly of a multi-station airtightness test device involved in the present invention;

[0016] Figure 3 It is a sectional view of the test fixture unit of a multi-station airtightness test device involved in the present invention;

[0017] Figure 4 It is a partial sectional view of the test seat assembly involved in the present invention.

[0018] Wherein: 10, the whole machine base plate; 20, the test fixture unit; 21, the test socket assembly; 211, the cylindrical socket body; 212, the sealing rubber ring; 213, the air inlet joint; 214, the test socket fixing plate; 22, the pressing fixture; 221, the limit block; 23, the fixture cylinder; 24, the fixture cylinder fixing frame; 30, the fixture moving base; 31, the guide rail; 32, the moving slider; 33, the moving base cylinder;

[0019] 40, the air supply unit; 50, the solenoid valve unit; 60, the flowmeter unit; 61, the flowmeter; 70, the electric box; 100, the part; 101, the pressure holding space.

Detailed implementation manners

[0020] The present utility model will be described in detail below with reference to the accompanying drawings and embodiments. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0022] Please refer to the attached Figure 1 : Which shows the multi-station airtightness testing device involved. The device includes the whole machine base plate 10, the test fixture unit 20, the fixture moving base 30, the air supply unit 40, the solenoid valve unit 50, and the flowmeter unit 60. The fixture moving base 30 is fixedly arranged on the whole machine base plate 10, and the test fixture unit 20 is installed on the fixture moving base 30. The air supply unit 40 is pneumatically connected to the test fixture unit 20 through the solenoid valve unit 50. A flowmeter unit 60 is provided in the middle of the air path below the air supply unit 40. The test fixture unit 20 includes a plurality of test stations, and the flowmeter unit 60 includes flowmeters 61 corresponding to the number of test stations.

[0023] The test fixture unit 20 includes a number of test stations, and each test station includes a test socket assembly 21 for placing the workpiece, an upper pressing fixture 22, and a fixture cylinder 23 for driving the upper pressing fixture to lift and press. From the attached Figure 1It is not difficult to intuitively see that there are four workstations in the test fixture unit. According to the specific operation personnel evaluation and efficiency requirements, the actual number of workstations to be set can be adjusted and configured by oneself.

[0024] The test fixture unit 20 further includes a fixture cylinder fixing bracket 24. The plurality of fixture cylinders 23 are mounted on the top of the fixture cylinder fixing bracket 24. The valve stem of the fixture cylinder 23 is connected to the upper pressing fixture 22 in the direction of the test seat assembly 21.

[0025] Please refer to Appendix Figure 2 and Appendix Figure 3 , which shows a split schematic diagram of the overall structure of the test unit 20. In it, we can completely and clearly observe the combined structural relationship of each part of the test unit 20 and the embodiment of the parts placed in the test unit 20.

[0026] Each test seat assembly 21 includes a cylindrical seat body 211, a sealing rubber ring 212, an air inlet joint 213, and a test seat fixing plate 214. The cylindrical seat body 211 is installed on the fixture moving base 30 through the test seat fixing plate 214. The cylindrical seat body 211 is internally provided with a sealing rubber ring 212, and an air inlet joint 213 is provided at the lower part of the cylindrical seat body 211.

[0027] A limiting block 221 is provided on the side of the upper pressing fixture 22.

[0028] The fixture moving base 30 includes a guide rail 31, a moving slider 32, and a moving base cylinder 33. The guide rail 31 is fixed on the whole machine base plate 10. The moving slider 32 is pushed by the moving base cylinder 33 to reciprocate below / away from the upper clamping fixture.

[0029] The device further includes an electric box 70. The air supply unit and the flow meter unit 60 are both installed and fixed on the electric box 70.

[0030] A solenoid valve unit 50 is provided below the flow meter 61 unit. In the actual product, the solenoid valve switch in the solenoid valve unit is connected to the test fixture unit 20 through an air pipe (not shown). Specifically, it is connected to the inside of the cylindrical seat body 211 through the air inlet joint 213 in the test fixture unit 20. The part 100 to be tested is placed in the inner hole of the cylindrical seat body 211. A sealing rubber ring 212 is used for sealing between the lower part of the part 100 to be tested and the cylindrical seat body 211. The sealing rubber ring 212 is used to block the gap of the leaked gas below the part, and the limiting block 221 is used for guiding and limiting the part 100.

[0031] Please refer to Appendix Figure 3 and Appendix Figure 4, the working process and principle of the airtightness testing device are described in conjunction with the attached drawings: Turn on the power supply, adjust the air supply system 40, and adjust the constant air pressure at the inlet of the filter. The pressure gauge can adjust the air pressure size and stability, and calibrate the quality of the sample value. Put 4 parts 100 into the cylindrical seat body 211 of the test fixture unit 20 respectively, press the start button, and the moving base cylinder 33 in the fixture moving base 30 drives the moving slider 32 to slide along the guide rail 31. The test fixture unit is arranged on the moving slider 32 through the test seat fixing plate 214. Therefore, the cylinder pushes the entire test fixture unit 20 to move upward to the lower position of the upper pressing fixture 22. After moving to the specified position, the upper pressing fixture 22 presses down and tightly fits with the lower cylindrical seat body 211 to achieve sealing. A pressure-holding space 101 is formed between the upper pressing fixture 22 and the part 100, and air pressure is injected into this pressure-holding space 101 and sealed by two sealing rubber rings 212. The two sealing rubber rings are respectively arranged between the mating surfaces of the upper pressing fixture 22 and the cylindrical seat body 211, and at the stepped clamping end of the part 100 to prevent gas leakage.

[0032] After 1 second, the set air pressure is supplied, and the airtightness detection flowmeter 61 starts to detect and output data. After pressure-holding for 10 seconds, if the air pressure decreases, it indicates that there are defects in the part, with fine cracks, resulting in gas leakage. If the air pressure remains stable, it is a good product without defects. The good products and defective products are identified through a row of arranged flow meters, and then exhaust is carried out. The upper mechanism fixture cylinder of the good product is loosened and moved upward to the in-place position and the light is on. The upper clamping fixture 22 retracts, and the product is taken out. If there is a defective product, the fixture cylinder presses on this product, and the operator needs to press the reset button, and the quick-moving cylinder retracts to take out the defective product, and they are placed separately. In this way, alternative testing is carried out.

[0033] The multi-station airtightness testing device involved in the present utility model improves the air flow testing effect by improving the structure of the test seat assembly, making the testing device have universality for adapting different parts. As long as it is a part of the shaft body or tube body type, it can be adapted and the airtightness can be tested. At the same time, multiple stations are integrated, and multiple pointer-type display air meters are correspondingly arranged at prominent positions after the stations, which can directly judge the existence of good products and defective products.

[0034] The above is only a preferred embodiment of the present utility model, and it does not impose any form of limitation on the present utility model. Although the present utility model is disclosed as above with a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art, without departing from the scope of the technical solution of the present utility model, when making some changes or modifications using the above-disclosed technical content as equivalent change equivalent embodiments, but as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical meaning of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A multi-station air tightness testing device, characterized in that: The device includes a complete machine base plate, a test fixture unit, a fixture mobile base, an air supply unit, a solenoid valve unit, and a flow meter unit. The fixture mobile base is fixedly arranged on the complete machine base plate, and the test fixture unit is installed on the fixture mobile base. The air supply unit is connected to the test fixture unit through the solenoid valve unit air path, and a flow meter unit is arranged in the middle of the air path below the air supply unit. The test fixture unit includes multiple test stations, and the flow meter unit includes flow meters corresponding to the number of test stations.

2. The multi-station airtightness testing device according to claim 1, characterized in that: The test fixture unit includes a plurality of test stations, each of which includes a test seat assembly for placing a workpiece, an upper clamping fixture, and a fixture cylinder for driving the upper clamping fixture to lift and clamp.

3. The multi-station airtightness testing device according to claim 2, characterized in that: The test fixture unit also includes a fixture cylinder fixing frame, and the plurality of fixture cylinders are mounted on the top of the fixture cylinder fixing frame. The valve stems of the fixture cylinders are connected to the upper clamping fixture toward the test seat.

4. The multi-station airtightness testing device according to claim 3, characterized in that: Each test seat assembly includes a cylindrical seat body, a sealing rubber ring, an air inlet joint, and a test seat fixing plate, wherein the cylindrical seat body is installed on the fixture moving base through the test seat fixing plate, the cylindrical seat body has a built-in sealing rubber ring, and an air inlet joint is provided at the lower part of the cylindrical seat body.

5. The multi-station airtightness testing device according to claim 2, characterized in that: A limiting block is provided on the side of the upper pressing fixture.

6. The multi-station airtightness testing device according to claim 4, characterized in that: The fixture movable base includes a guide rail, a movable slider, and a movable base cylinder. The guide rail is fixed on the bottom plate of the whole machine, and the movable slider is pushed by the movable base cylinder to reciprocate toward the bottom of the upper clamping fixture / away from the upper clamping fixture.

7. The multi-station airtightness testing device according to claim 1, characterized in that: The device also includes an electrical box, and the gas supply unit and the flow meter unit are both installed and fixed on the electrical box.

8. The multi-station airtightness testing device according to claim 7, characterized in that: A solenoid valve unit is provided below the flow meter unit.

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