An automatic pressure-holding test system

Abstract

The present invention provides an automatic pressure-holding test system for performing pressure-holding tests on parts with an internal cavity and two interfaces communicating with the cavity. In the automatic pressure-holding test system, a loading table and an unloading table are respectively used for placing parts to be tested and parts that have completed the test; a pressure-holding tester is used to inject liquid and pressurize the internal cavity of the part to be tested; the upper end surface of the test platform is flat, and multiple groups of independent test fixtures are provided corresponding to parts of different structures one by one. For each group of test fixtures and the corresponding part to be tested, the part to be tested placed on the upper end surface of the test platform is clamped by a clamping mechanism, the positioning pins on the pressure-holding block are positioned in the positioning holes of the clamped part to be tested in a matching manner, two quick connectors are respectively tightly connected to the corresponding interfaces, and a pressure-holding pipeline communicates with the cavity inside the part to be tested. The present invention can improve the automation degree of the pressure-holding test of parts and replace the traditional manual operation method.

Description

Technical Field

[0001] The present invention relates to a testing device, and more particularly to an automatic pressure maintaining testing system. Background Art

[0002] During factory production, it is often necessary to perform pressure maintaining tests on some parts that need to store liquid internally in order to check whether there are leaks or processing defects. Currently, these tasks rely on manual operation by workers. On the one hand, due to the heavy weight of the workpieces, workers will be very strenuous during large-scale production. On the other hand, if the installation is not in place during pressurization, it will be dangerous. Therefore, it is necessary to design a system device that can automatically carry and dock to replace manual labor to complete this work, reducing the labor intensity on the one hand and ensuring the safety of workers on the other hand. Summary of the Invention

[0003] The present invention aims to solve the above technical problems at least to a certain extent. For this purpose, the present invention provides an automatic pressure maintaining testing system, aiming to improve the automation degree of the pressure maintaining test of parts, replace the traditional manual operation method, and reduce the burden and increase efficiency.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An automatic pressure maintaining testing system, characterized in that:

[0006] It is used for the pressure maintaining test of parts with an internal cavity and two interfaces communicating with the cavity on the outside. The two interfaces are provided at the head of the part and are respectively used for liquid inlet and liquid outlet. A positioning hole is also provided at the head of the part; the automatic pressure maintaining testing system includes a loading platform, a testing platform, a pressure maintaining tester, and an unloading platform;

[0007] The loading platform and the unloading platform are located on both sides of the testing platform, adjacent to the testing platform, and are respectively used for placing parts to be tested and parts that have completed the test;

[0008] The pressure maintaining tester is arranged on the other side of the testing platform and is used for injecting liquid into the internal cavity of the part to be tested to pressurize it, and is provided with a liquid return pipeline;

[0009] The upper surface of the test platform is flat, and multiple groups of independent test fixtures are provided corresponding to parts of different structures one by one. Each group of test fixtures includes a pressure-holding block and a clamping mechanism. The pressure-holding block is provided with two pressure-holding pipelines. One end of each of the two pressure-holding pipelines is respectively connected to the liquid outlet and the liquid return port of the pressure-holding tester, and the other end is respectively connected to two exposed quick connectors on the pressure-holding block. The two quick connectors are configured corresponding to the positions and shapes of two interfaces on the part to be tested. The pressure-holding block uses the end with the quick connectors as the docking end for cooperation with the part to be tested. On the docking end, positioning pins are arranged corresponding to the position distribution and external dimensions of the positioning holes. Between each group of test fixtures and the corresponding part to be tested, the part to be tested placed on the upper surface of the test platform is clamped by the clamping mechanism. The positioning pins on the pressure-holding block are fitted and positioned in the positioning holes of the clamped part to be tested. The two quick connectors are respectively tightly connected to the corresponding interfaces, and the pressure-holding pipelines are communicated with the cavities inside the part to be tested.

[0010] The structural features of the present invention also lie in:

[0011] It further includes a handling robot, which is used to transport the parts to be tested on the loading platform to the corresponding test fixtures, and transport the parts that have completed the test on the test fixtures to the unloading platform.

[0012] The handling robot is placed behind the test platform, the pressure-holding tester is placed in front of the test platform, and the loading platform and the unloading platform are respectively located on the left and right sides of the test platform.

[0013] The test platform is provided with a total of four groups of test fixtures.

[0014] The multiple groups of test fixtures include Test Fixture One, which is used for the pressure-holding test of Part One. Test Fixture One includes a first pressure-holding block, a pair of first pressing cylinders, and a first pushing cylinder. The first pressure-holding block and the first pushing cylinder are arranged opposite to each other, and the area between them is used as the placement area for Part One. The execution end of the first pushing cylinder presses against the tail of Part One towards the first pressure-holding block, making the head of Part One closely connected to the docking end of the first pressure-holding block. A pair of first pressing cylinders are respectively arranged on the other two sides of Part One, arranged in a staggered manner, and can respectively press down on Part One from the top of Part One.

[0015] The multiple groups of test fixtures include Test Fixture Two, which is used for the pressure-holding test of Part Two. Test Fixture Two includes a second pressure-holding block, a second pressing cylinder, and a second pushing cylinder. The second pressure-holding block and the second pushing cylinder are arranged opposite to each other, and the area between them is used as the placement area for Part Two. The execution end of the second pushing cylinder presses against the tail of Part Two towards the second pressure-holding block, making the head of Part Two closely connected to the docking end of the second pressure-holding block. The second pressing cylinder is externally arranged on one of the side edges of Part Two and can press down on Part Two from the top of Part Two.

[0016] The multiple groups of test tooling include test tooling three, which is used for the pressure-holding test of part three. The test tooling three includes a third pressure-holding block, a pair of third pressing cylinders, and a third material-pushing cylinder. The third pressure-holding block and the third material-pushing cylinder are arranged opposite to each other, and the area between them serves as the placement area for part three. The execution end of the third material-pushing cylinder presses against the tail of part three towards the third pressure-holding block, closely connecting the head of part three with the docking end of the third pressure-holding block. A pair of third pressing cylinders are respectively arranged on the other two sides of part three and can press part three downward from the top of part three.

[0017] The multiple groups of test tooling include test tooling four, which is used for the pressure-holding test of part four. The test tooling four includes a fourth pressure-holding block and four fourth pressing cylinders. The head of part four with an interface and positioning holes faces downward, and the docking surface of the fourth pressure-holding block faces upward. Part four with its head facing downward and docked with the fourth pressure-holding block is pressed downward from the top by four fourth pressing cylinders located at the outer peripheries of the four corners of part four, forming the clamping of part four.

[0018] The pressure-holding pipeline is built into the pressure-holding block.

[0019] Compared with the prior art, the beneficial effects of the present invention are reflected in:

[0020] By setting up a loading table, a test platform, a pressure-holding tester, a unloading table, and a handling robot can also be configured. There are multiple groups of test tooling on the test platform, which can be used for the pressure-holding test of parts of various specifications. The entire pressure-holding test process has a high degree of automation, saving both labor and ensuring the safety of workers, improving the test efficiency, and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall structural schematic diagram of the present invention;

[0022] Figure 2 is Figure 1 the structural schematic diagram of the test platform in

[0023] Figure 3 is Figure 2 the top-view structural schematic diagram of test tooling one in

[0024] Figure 4 is Figure 2 the top-view structural schematic diagram of test tooling two in

[0025] Figure 5 is Figure 2 the top-view structural schematic diagram of test tooling three in

[0026] Figure 6 is Figure 2 the top-view structural schematic diagram of test tooling four in

[0027] Figure 7 is Figure 3 a structural schematic diagram of part one in

[0028] Figure 8 is Figure 3 a structural schematic diagram of the pressure-holding pipeline in

[0029] In the figure, 1 is the loading platform; 2 is the pressure-holding tester; 3 is the unloading platform; 4 is the test platform; 5 is the first test fixture; 6 is the first pressure-holding block; 7 is the first pressing cylinder; 8 is the first pushing cylinder; 9 is part one; 10 is the second test fixture; 11 is the second pressure-holding block; 12 is the second pressing cylinder; 13 is the second pushing cylinder; 14 is part two; 15 is the third test fixture; 16 is the third pressure-holding block; 17 is the third pressing cylinder; 18 is the third pushing cylinder; 19 is part three; 20 is the fourth test fixture; 21 is the fourth pressure-holding block; 22 is the fourth pressing cylinder; 23 is part four; 24 is the pressure-holding pipeline; 25 is the positioning pin; 26 is the quick connector; 27 is the positioning hole; 28 is the interface; 29 is the handling robot. Specific embodiments

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1 to 8 , the automatic pressure-holding test system of this embodiment is used for the pressure-holding test of parts with an internal cavity and two interfaces 28 communicating with the cavity on the outside. The two interfaces 28 are provided at the head of the part, and are respectively used for liquid inlet and liquid outlet. The head of the part is also provided with a positioning hole 27; the automatic pressure-holding test system includes a loading platform 1, a test platform 4, a pressure-holding tester 2, and an unloading platform 3;

[0032] The loading platform 1 and the unloading platform 3 are located on both sides of the test platform 4, adjacent to the test platform 4, and are respectively used for placing parts to be tested and parts that have completed the test;

[0033] The pressure-holding tester 2 is arranged on the other side of the test platform 4, and is used for injecting liquid into the internal cavity of the part to be tested to pressurize it, and is provided with a liquid return pipeline;

[0034] The upper surface of the test platform 4 is flat, and multiple sets of independent test fixtures are arranged one-to-one corresponding to the parts 9 with different structures. Each set of test fixtures includes a pressure-holding block and a clamping mechanism. The pressure-holding block is provided with two pressure-holding pipelines 24. One ends of the two pressure-holding pipelines 24 are respectively connected to the liquid outlet and the liquid return port of the pressure-holding tester 2, and the other ends are respectively connected to two quick connectors 26 exposed on the pressure-holding block. The two quick connectors 26 are arranged corresponding to the positions and shapes of two interfaces 28 on the part to be tested. The end of the pressure-holding block with the quick connectors 26 is used as the docking end for cooperating with the part to be tested. On the docking end, positioning pins 25 are arranged to be adapted to the position distribution and external dimension of the positioning holes 27. Between each set of test fixtures and the corresponding part to be tested, the part to be tested placed on the upper surface of the test platform 4 is clamped by the clamping mechanism. The positioning pins 25 on the pressure-holding block are positioned in the positioning holes 27 of the clamped part to be tested. The two quick connectors 26 are respectively closely connected to the corresponding interfaces 28, and the pressure-holding pipelines 24 are communicated with the cavities inside the part to be tested.

[0035] In specific implementation, the corresponding structural settings also include:

[0036] The liquid injected by the pressure-holding tester 2 into the part to be tested is water. In this embodiment, the pressure-holding tester selects a pneumatic hydraulic station, which is equipped with a liquid booster pump, an accumulator, and an overflow valve. The output pressure is adjustable and controllable. Compared with an electric hydraulic station, it has a smaller volume and lighter weight. In addition to being used for pressure-holding, it can also be used in occasions such as hydraulic boosting, oil pressure boosting, and high-pressure voltage stabilization.

[0037] The quick connectors 26 selected are of the CGO / CGD series quick connectors of the staubli company.

[0038] It also includes a handling robot 29, which is used to transport the parts to be tested on the loading platform 1 to the corresponding test fixtures, and transport the parts that have completed the test on the test fixtures to the unloading platform 3.

[0039] The handling robot 29 is placed behind the test platform 4, the pressure-holding tester 2 is placed in front of the test platform 4, and the loading platform 1 and the unloading platform 3 are respectively located on the left and right sides of the test platform 4.

[0040] The test platform 4 is provided with a total of four sets of test fixtures.

[0041] The multiple groups of test tooling include test tooling one 5, which is used for the pressure-holding test of part one 9. Test tooling one 5 includes a first pressure-holding block 6, a pair of first pressing cylinders 7, and a first feeding cylinder 8. The first pressure-holding block 6 and the first feeding cylinder 8 are arranged opposite to each other, and the area between them serves as the placement area for part one 9. The execution end of the first feeding cylinder 8 presses against the tail of part one 9 towards the first pressure-holding block 6, closely connecting the head of part one 9 with the docking end of the first pressure-holding block 6. The pair of first pressing cylinders 7 are respectively arranged on the other two sides of part one 9, arranged in a staggered manner, and can press part one 9 downward from the top of part one 9 respectively.

[0042] The multiple groups of test tooling include test tooling two 10, which is used for the pressure-holding test of part two 14. Test tooling two 10 includes a second pressure-holding block 11, a second pressing cylinder 12, and a second feeding cylinder 13. The second pressure-holding block 11 and the second feeding cylinder 13 are arranged opposite to each other, and the area between them serves as the placement area for part two 14. The execution end of the second feeding cylinder 13 presses against the tail of part two 14 towards the second pressure-holding block 11, closely connecting the head of part two 14 with the docking end of the second pressure-holding block 11. The second pressing cylinder 12 is externally arranged on one of the side edges of part two 14 and can press part two 14 downward from the top of part two 14.

[0043] The multiple groups of test tooling include test tooling three 15, which is used for the pressure-holding test of part three 19. Test tooling three 15 includes a third pressure-holding block 16, a pair of third pressing cylinders 17, and a third feeding cylinder 18. The third pressure-holding block 16 and the third feeding cylinder 18 are arranged opposite to each other, and the area between them serves as the placement area for part three 19. The execution end of the third feeding cylinder 18 presses against the tail of part three 19 towards the third pressure-holding block 16, closely connecting the head of part three 19 with the docking end of the third pressure-holding block 16. The pair of third pressing cylinders 17 are respectively arranged outside the other two sides of part three 19 and can press part three 19 downward from the top of part three 19.

[0044] The multiple groups of test tooling include test tooling four 20, which is used for the pressure-holding test of part four 23. Test tooling four 20 includes a fourth pressure-holding block 21 and four fourth pressing cylinders 22. The head of part four 23 with an interface 28 and a positioning hole 27 faces downward, and the docking surface of the fourth pressure-holding block 21 faces upward. Part four 23 with its head facing downward and docked with the fourth pressure-holding block 21 is pressed downward from the top by the four fourth pressing cylinders 22 located at the outer circumferences of the four corners of part four 23, forming a clamping of part four 23.

[0045] The pressure-holding pipeline 24 is built into the pressure-holding block.

[0046] Among the above four groups of test tooling, the pressing cylinders all adopt rotary clamping cylinders.

[0047] Working principle:

[0048] The part to be tested is accurately placed on the loading table 1 manually, and the handling robot 29 transports the part to be tested on the loading table 1 to the corresponding test fixture. Then the pusher cylinder acts to push the part to be tested so that the end with the interface 28 is closely connected to the docking end of the pressure-holding block. The positioning pin 25 is positioned in the positioning hole 27, and the quick connector 26 is connected to the interface 28. After the docking is completed, the clamping cylinder acts to clamp the part to be tested so that it will not shake during the pressurization process. Then, the pressure-holding tester 2 injects liquid and pressurizes and holds the pressure in the internal cavity of the part to be tested. The time record data can be referred to determine whether it is qualified. During the liquid injection pressurization and pressure-holding process, the pressure-holding tester 2 injects liquid into the cavity of the part to be tested through one of the pressure-holding pipes 24 and through one of the interfaces 28, and then flows back to the pressure-holding tester 2 through the other interface 28 and through the other pressure-holding pipe 24 to realize the circulating flow of the liquid during the test process. After the pressure-holding test is completed, the clamping cylinder and the pusher cylinder are loosened, and then the handling robot 29 transports the part that has completed the test to the unloading table 3. The entire pressure-holding test process has a high degree of automation and less manual participation. The main task of the staff is to record data during the test process to determine whether the part is qualified.

[0049] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An automatic pressure-holding test system, characterized in that: For the pressure-holding test of a part with an internal cavity and two interfaces communicating with the cavity. The two interfaces are provided at the head of the part, respectively for liquid inlet and liquid outlet, and a positioning hole is also provided at the head of the part; the automatic pressure-holding test system includes a loading table, a test platform, a pressure-holding tester, and an unloading table; The loading table and the unloading table are located on both sides of the test platform, adjacent to the test platform, and are respectively used for placing the parts to be tested and the parts that have completed the test; The pressure-holding tester is arranged on the other side of the test platform, used for injecting liquid into the internal cavity of the part to be tested to pressurize, and is provided with a liquid return pipeline; The upper end surface of the test platform is flat, and multiple groups of test toolings independent of each other are provided corresponding to parts of different structures one by one. Each group of test toolings includes a pressure-holding block and a clamping mechanism. The pressure-holding block is provided with two pressure-holding pipelines. One ends of the two pressure-holding pipelines are respectively connected to the liquid outlet and the liquid return port of the pressure-holding tester, and the other ends are respectively connected to two exposed quick connectors on the pressure-holding block. The two quick connectors are configured corresponding to the positions and shapes of the two interfaces on the part to be tested. The pressure-holding block uses the end with the quick connectors as the docking end for cooperating with the part to be tested, and a positioning pin is arranged on the docking end. The position distribution and external dimension of the positioning pin are adapted to the positioning hole at the head of the part. Between each group of test toolings and the corresponding part to be tested, the part to be tested placed on the upper end surface of the test platform is clamped by the clamping mechanism. The positioning pin on the pressure-holding block is cooperatively positioned in the positioning hole of the clamped part to be tested, and the two quick connectors are respectively closely connected to the corresponding interfaces. The pressure-holding pipelines communicate with the cavity inside the part to be tested; the pressure-holding pipelines are placed inside the pressure-holding block; The multiple groups of test toolings include Test Tooling One for the pressure-holding test of Part One. Test Tooling One includes a first pressure-holding block, a pair of first pressing cylinders, and a first pushing cylinder. The first pressure-holding block and the first pushing cylinder are arranged opposite to each other, and the area between them is used as the placement area for Part One. The execution end of the first pushing cylinder presses against the tail of Part One towards the first pressure-holding block, making the head of Part One closely connected to the docking end of the first pressure-holding block. A pair of first pressing cylinders are respectively arranged on the other two sides of Part One, arranged in a staggered manner, and can press down on Part One respectively at the top of Part One; It also includes a handling robot, used for handling the parts to be tested on the loading table to the corresponding test toolings, and for handling the parts that have completed the test on the test toolings to the unloading table; the handling robot is placed behind the test platform, the pressure-holding tester is placed in front of the test platform, and the loading table and the unloading table are respectively located on the left and right sides of the test platform.

2. The automatic pressure-holding test system according to claim 1, characterized in that: The test platform is provided with a total of four groups of test toolings.

3. The automatic pressure-holding test system according to claim 1 or 2, characterized in that: The multiple groups of test tooling include test tooling two, which is used for the pressure-holding test of part two. The test tooling two includes a second pressure-holding block, a second pressing cylinder, and a second feeding cylinder. The second pressure-holding block is arranged opposite to the second feeding cylinder, and the area between them serves as the placement area for part two. The execution end of the second feeding cylinder presses against the tail of part two towards the second pressure-holding block, closely connecting the head of part two with the docking end of the second pressure-holding block. The second pressing cylinder is externally arranged on one side of part two and can press part two downward from the top of part two.

4. The automatic pressure-holding test system according to claim 1 or 2, characterized in that: The multiple groups of test tooling include test tooling three, which is used for the pressure-holding test of part three. The test tooling three includes a third pressure-holding block, a pair of third pressing cylinders, and a third feeding cylinder. The third pressure-holding block is arranged opposite to the third feeding cylinder, and the area between them serves as the placement area for part three. The execution end of the third feeding cylinder presses against the tail of part three towards the third pressure-holding block, closely connecting the head of part three with the docking end of the third pressure-holding block. The pair of third pressing cylinders are respectively arranged on the other two sides of part three and can press part three downward from the top of part three.

5. The automatic pressure-holding test system according to claim 1 or 2, characterized in that: The multiple groups of test tooling include test tooling four, which is used for the pressure-holding test of part four. The test tooling four includes a fourth pressure-holding block and four fourth pressing cylinders. The docking surface of the fourth pressure-holding block faces upward. The head of part four faces downward and has an interface and a positioning hole. The head of part four is docked with the docking surface of the fourth pressure-holding block, and the four fourth pressing cylinders located at the outer periphery of the four corners of part four press part four downward from the top to form clamping of part four.

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