Vibration and extrusion composite test device

Abstract

The utility model discloses a vibration and extrusion composite test device which comprises a support structure, a vibration exciter arranged on the support structure, a static extrusion structure used for applying static extrusion to a test piece and a load used for applying dynamic extrusion to the test piece, and the test piece is arranged on the vibration exciter; the static extrusion structure comprises a hydraulic cylinder for applying static extrusion force to the test piece and a pressing table board connected with the hydraulic cylinder, and the hydraulic cylinder drives the pressing table board to linearly move in the direction close to or away from the test piece so as to adjust the static extrusion force to the test piece; the extrusion direction of the hydraulic cylinder on the test piece is consistent with the vibration direction of the vibration exciter; in the vibration process, the static extrusion force of the test piece is constant, and the dynamic extrusion force is changed. The vibration exciter carries out a vibration test on the test piece, the static extrusion structure and the dynamic extrusion structure carry out an extrusion test, and the device can enable the test piece to carry out the extrusion test while carrying out the vibration test.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration testing, in particular to a vibration and extrusion composite testing device. Background Art

[0002] In modern industrial design, verifying product reliability is a key step in ensuring stable operation in real-world applications. For many products, their operating environment isn't simply static; it encompasses a complex mix of mechanical conditions. For example, during transportation, products may experience both vibration and static loads. Therefore, test equipment capable of realistically simulating these complex environments is crucial. According to recent market research, over 60% of product failures are caused by environmental stress, highlighting the importance of complex environmental simulation.

[0003] There are already some devices on the market that can perform vibration tests and extrusion tests separately, but for the test needs that require simulating vibration and extrusion composite environments at the same time, they are currently unable to meet this demand. Summary of the Invention

[0004] The purpose of the utility model is to solve the above problems in the existing technology and to propose a vibration and extrusion composite test device.

[0005] To achieve the above-mentioned object, the following technical solution can be used: a vibration and extrusion composite test device, comprising a support structure, an exciter arranged on the support structure, a static extrusion structure for applying static extrusion to a test piece, and a load for applying dynamic extrusion to the test piece, wherein the test piece is arranged on the exciter;

[0006] The static extrusion structure includes a hydraulic cylinder for applying a static extrusion force to the test piece and a pressing table connected to the hydraulic cylinder. The hydraulic cylinder drives the pressing table to move linearly toward or away from the test piece to adjust the static extrusion force on the test piece. The extrusion direction of the hydraulic cylinder on the test piece is consistent with the vibration direction of the exciter.

[0007] During the vibration process, the static extrusion force of the test piece is constant, while the dynamic extrusion force changes.

[0008] More specifically, the hydraulic cylinder includes an upper oil cylinder and a lower oil cylinder, the upper oil cylinder is connected to an upper oil chamber accumulator, and the lower oil cylinder is connected to a lower oil chamber accumulator.

[0009] More specifically, the hydraulic cylinder is arranged on the support structure.

[0010] More specifically, the hydraulic cylinder is arranged on the extension table.

[0011] More specifically, the dynamic extrusion structure includes an adjustable load, and the adjustable load is arranged on the pressing table.

[0012] More specifically, four hydraulic cylinders are provided, and the four hydraulic cylinders are evenly arranged around the vibrator.

[0013] More specifically, each of the hydraulic cylinders is connected to two accumulators.

[0014] More specifically, a guide member is provided on the support structure, and the pressing table can move up and down along the guide member.

[0015] More specifically, four guide members are provided, and the four guide members are evenly arranged around the pressing table.

[0016] More specifically, the guide member is configured as a guide shaft, a guide hole is provided on the pressing table, and the guide shaft is disposed in the guide hole.

[0017] More specifically, the bottom of the hydraulic cylinder is connected to the support structure, and the top of the hydraulic cylinder is connected to the pressing table.

[0018] More specifically, the vibration exciter is configured as a hydraulic table, an electric table or a mechanical table.

[0019] The utility model provides a vibration and extrusion composite test device, which can achieve the following technical effects:

[0020] An exciter, a static extrusion structure and a load are set up at the same time. The exciter performs a vibration test on the test piece, and the static extrusion structure and the load can provide extrusion pressure. The static extrusion structure provides a constant extrusion pressure for the test piece, and the load provides the test piece with an extrusion pressure that changes during the vibration process. This device can make the test piece undergo an extrusion test at the same time as the vibration test, simulating the composite mechanical environment of the product subjected to vibration and extrusion, and improving the reliability of the product through such comprehensive mechanical tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the vibration test bench of the utility model;

[0022] Figure 2 This is a schematic diagram of the main structure of the vibration test bench of the utility model;

[0023] In the figure: 1. Support structure; 2. Vibrator; 3. Extension table; 4. Test piece; 5. Hydraulic cylinder; 6. Guide shaft; 71. Upper oil chamber accumulator; 72. Lower oil chamber accumulator; 8. Clamping table; 81. Reinforcement; 9. Load. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the implementation of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present invention, and should not be understood as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention. The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings.

[0026] A vibration and extrusion composite test device, such as Figure 1 、 Figure 2 As shown, the apparatus includes a support structure 1 and a vibrator 2 mounted on the support structure 1. The support structure 1 is configured as a base, which is mounted on the ground and used to secure the vibrator 2. The vibrator 2 is positioned in the middle of the base for more reliable securement. The vibrator 2 is mounted on the base, and an extended table 3 is mounted on the vibrator 2. A test piece 4 is mounted on the extended table 3. The vibrator 2 is activated to perform a vibration test on the test piece 4.

[0027] The vibration exciter 2 is configured as a hydraulic platform, an electric platform or a mechanical platform.

[0028] To conduct an extrusion test simultaneously with a vibration test, the combined vibration and extrusion test apparatus further includes a static extrusion structure and a dynamic extrusion structure. The static extrusion structure applies a static extrusion force to the test piece 4, which remains unchanged during the vibration process and is applied before the vibration process. The dynamic extrusion structure applies a dynamic extrusion force to the test piece 4, which changes during the vibration process. Both the static and dynamic extrusion forces are adjustable.

[0029] The static extrusion structure includes a hydraulic cylinder 5 and a pressing table 8 connected to the hydraulic cylinder 5. The pressing table 8 is located above the test piece 4. The hydraulic cylinder 5 drives the pressing table 8 to move linearly toward or away from the test piece 4 to adjust the static extrusion force on the test piece 4. The extrusion direction of the hydraulic cylinder 5 on the test piece 4 is consistent with the vibration direction of the exciter 2. That is, when the vibration direction of the exciter 2 is horizontal, the hydraulic cylinder 5 applies a static extrusion force to the test piece 4 in the horizontal direction. When the vibration direction of the exciter 2 is vertical, the hydraulic cylinder 5 applies a static extrusion force to the test piece 4 in the vertical direction.

[0030] There are two locations for the hydraulic cylinder 5: the hydraulic cylinder 5 is arranged on the support structure 1 or on the extended table 3.

[0031] When the hydraulic cylinder 5 is set on the extension table 3, the hydraulic cylinder 5 vibrates simultaneously with the vibrator 2, and no other structure is required. This ensures that the hydraulic cylinder 5's extrusion force on the test piece 4 is the same at all times and remains constant. However, setting the hydraulic cylinder 5 on the extension table 3 also means that the hydraulic cylinder 2 performs the vibration test together with the test piece 4. If the hydraulic cylinder 5 used is of poor quality, it may be damaged before the test piece 4, and the extrusion test on the test piece 4 cannot be completed. At the same time, when the hydraulic cylinder 5 and the test piece 4 are set on the extension table 3 at the same time, the maximum mass that can be tested by the test piece 4 will be reduced to adapt to the strength of the extension table 3, the vibration frequency response will be reduced, and the vibration frequency will also be reduced. If the mass of the extension table 3 is increased to ensure the maximum mass that can be tested by the test piece 4, the overall mass on the vibrator 2 will be increased, so the vibration acceleration will also be reduced.

[0032] When the hydraulic cylinder 5 is arranged on the support structure 1, that is, when it is arranged on the base, the overall mass will not be increased, and the vibration acceleration and vibration frequency of the exciter 2 will be guaranteed. However, other structures need to be set to ensure that during the vibration process, the extrusion pressure of the hydraulic cylinder 5 on the test piece 4 remains unchanged. In this solution, this structure is adopted, and an accumulator is set at the same time to ensure that the extrusion pressure of the hydraulic cylinder 5 on the test piece 4 remains unchanged.

[0033] The bottom of the cylinder body of the hydraulic cylinder 5 is connected to the base, and the top of the piston rod of the hydraulic cylinder 5 is connected to the pressing table 8. Furthermore, the arrangement of the hydraulic cylinder 5 needs to ensure that the pressing table 8 exerts a uniform extrusion force on the test piece 4. Therefore, a plurality of hydraulic cylinders 5 are provided, and the plurality of hydraulic cylinders 5 are evenly arranged around the pressing table 8. The plurality of hydraulic cylinders 5 synchronously drive the pressing table 8 to move toward or away from the test piece 4, ensuring synchronization of the extrusion force on the test piece 4. At the same time, due to the even arrangement of the hydraulic cylinders 5, the static extrusion force of the entire pressing table 8 on the test piece 4 is uniform.

[0034] Furthermore, four hydraulic cylinders 5 are provided, and the four hydraulic cylinders 5 are respectively provided at the four corners of the pressing table 8. Of course, six or eight hydraulic cylinders 5 can also be provided to ensure that the squeezing force on the test piece 4 is uniform.

[0035] The hydraulic cylinder 5 drives the clamping table 8 to exert an extrusion force on the test piece 4, which is the static extrusion force on the test piece 4. The static extrusion force on the test piece 4 is adjusted by setting the oil pressure in the hydraulic cylinder 5. The static extrusion force on the test piece 4 is changed by changing the oil pressure in the hydraulic cylinder 5.

[0036] The hydraulic cylinder 5 is set on the support structure 2. When the test piece 4 is subjected to the vibration test, the piston rod of the hydraulic cylinder 5 cannot passively vibrate with the exciter 2. In order to ensure that the test piece 4 is subjected to the extrusion test while the vibration test is carried out, the piston rod of the hydraulic cylinder 5 needs to move up and down in the cylinder body when the exciter 2 vibrates to realize the passive vibration of the piston rod. One hydraulic cylinder 5 is connected to two accumulators.

[0037] Furthermore, the hydraulic cylinder 5 includes an upper oil chamber and a lower oil chamber. The upper oil chamber is connected to an upper oil chamber accumulator 71, and the lower oil chamber is connected to a lower oil chamber accumulator 72. When the piston rod follows the vibrator 2 for vibration testing, the hydraulic oil in the upper and lower oil chambers of the hydraulic cylinder 5 can freely flow in and out of the accumulator, ensuring passive vibration of the piston rod. In this embodiment, four hydraulic cylinders 5 are provided, each of which is connected to an upper oil chamber accumulator 71 and a lower oil chamber accumulator 72.

[0038] In order to prevent the horizontal displacement of the pressing table 8 when it moves up and down, resulting in uneven static extrusion force on the test piece 4, a guide member is provided on the base. The guide member can be set to any structure that can ensure the linear movement of the pressing table 8. In this solution, the guide member is set to a guide shaft 6. There are several guide shafts 6, and the guide shafts 6 are evenly arranged around the pressing table 8. In this solution, there are four guide shafts 6, and the four guide shafts 6 are respectively arranged at the four corners of the pressing table 8. The guide shafts 6 are arranged in the same position as the hydraulic cylinder 5, that is, a hydraulic cylinder 5 and a guide shaft 6 are provided at each corner of the pressing table 8. The guide shaft 6 ensures that the hydraulic cylinder 5 drives the pressing table 8 vertically, thereby avoiding uneven static extrusion force on the test piece 4.

[0039] Guide holes are opened on the pressing table 8 according to the positions and number of the guide shafts 6 , and the guide shafts 6 are arranged in the guide holes. When the hydraulic cylinder 5 drives the pressing table 8 to move up and down, the pressing table 8 moves along the guide shafts 6 .

[0040] The dynamic extrusion structure includes a load 9, which is set on the pressing table 8. The load 9 can be set as a standard part. For example, a number of loads 9 are set, and the mass of each load 9 is the same. The number of loads 9 can be increased or decreased according to the required dynamic extrusion force. Alternatively, a number of loads 9 with different masses can be set, and loads 9 with different masses can be placed according to the required dynamic extrusion force. During the vibration test, the acceleration of the load set on the exciter changes, but the mass remains unchanged. The extrusion force of the load on the test piece will change. Therefore, the extrusion force of the dynamic extrusion structure on the test piece will change during the vibration process. Reinforcement ribs are set on the pressing table 8 to enhance the strength of the pressing table 8, to prevent the pressing table 8 from being insufficiently strong or bending when the weight of the load 9 is large. The load 9 is set on the reinforcement rib and fixed to the reinforcement rib by screws to prevent the load 9 from falling during the vibration test.

[0041] The guide shaft 6 is set on the base and protrudes through the clamping table 8. Because it is necessary to meet the requirements of placing different test pieces 4 on the clamping table 8 and the expansion table 3, the guide shaft 6 is set longer, and there may be a situation where the guide shaft 6 protrudes from the clamping table 8. The load 9s is set between the four guide shafts 6. The four guide shafts 6 surround the load 9 to enclose the load 9 and position the load 9 to facilitate fixation with the reinforcement ribs. Therefore, the height of the guide shaft 6 needs to be ensured to be higher than the load 9.

[0042] The mass of the load 9 and the clamping table 8 and the vibration level of the exciter 2 jointly determine the magnitude of the dynamic extrusion force exerted on the test piece 4. When the vibration level remains constant, the magnitude of the dynamic extrusion force exerted on the test piece 4 can be adjusted by replacing the load 9. The greater the load adjustment, the greater the dynamic extrusion force exerted.

[0043] The hydraulic cylinder 5 is extended and retracted to apply static extrusion pressure, and the load 9 is replaced to apply dynamic extrusion pressure during vibration. The extrusion pressure of the composite test device is a dynamic extrusion pressure applied simultaneously on the basis of static extrusion pressure, and the magnitude of the two extrusion pressures can be adjusted, which better meets the larger range of vibration and extrusion composite tests on the market, simulates the composite mechanical environment of the product subjected to vibration and extrusion, and improves the reliability of the product through such comprehensive mechanical tests.

[0044] The working process of the vibration and extrusion composite test device is as follows:

[0045] The four hydraulic cylinders 5 are controlled to synchronously drive the pressing table 8 to move toward the side away from the extension table 3. After a certain distance is left between the extension table 3 and the pressing table 8, the test piece 4 is placed on the extension table 3. According to the static extrusion force that the test piece 4 needs to be subjected to, the hydraulic cylinders 5 are controlled to drive the pressing table 8 to move along the guide shaft 6 toward the direction close to the test piece 4 to extrude the test piece 4. The driving direction of the hydraulic cylinder 5 is the same as the vibration direction of the exciter 2, that is, when the exciter 2 vibrates horizontally, the hydraulic cylinder 5 moves linearly in the horizontal direction, and when the exciter 2 vibrates vertically, the hydraulic cylinder 5 moves linearly in the vertical direction. Since the mass of the pressing table 8 is fixed, the The vibration level of the exciter 2 is constant. According to the needs of the test piece 4, a load 9 of a certain mass is placed, and the load 9 is placed on the reinforcing ribs of the pressing table 8, and the load 9 is fixed to prevent it from falling off during the vibration process. The extrusion pressure on the test piece 4 is adjusted by adjusting the static extrusion force and the dynamic extrusion force. After the extrusion force of the test piece 4 is adjusted, the exciter 2 is started. During the vibration process, the accumulator is driven to adjust the oil pressure in the hydraulic cylinder 5 to ensure that the static extrusion force on the test piece 4 is constant during the vibration process. The extrusion force of the load 9 on the test piece 4 will change during the vibration process, and the vibration and extrusion test of the test piece 4 is completed.

[0046] The utility model provides a vibration and extrusion composite test device, which can achieve the following technical effects:

[0047] At the same time, an exciter 2, a static extrusion structure and a dynamic extrusion structure are provided. The exciter 2 performs a vibration test on the test piece 4. The extrusion force of the static extrusion structure on the test piece 4 does not change during the vibration process, while the extrusion force of the dynamic extrusion structure on the test piece 4 changes during the vibration process. The changing extrusion force and the unchanged extrusion force during the vibration process jointly perform an extrusion test on the test piece 4. This device allows the test piece 4 to perform an extrusion test while undergoing a vibration test. A guide shaft 6 is provided to prevent the pressing table 8 from shifting in the horizontal direction, which would cause uneven extrusion of the test piece 4. Each of the hydraulic cylinders 5 is connected to two accumulators, so that when the exciter 2 vibrates, the piston rod of the hydraulic cylinder 5 follows the vibration. Reinforcing ribs are provided on the pressing table 8 to prevent the pressing table from being insufficiently strong or bending.

[0048] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0049] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0050] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A vibration and extrusion composite test device, characterized in that: The invention comprises a support structure (1), an exciter (2) arranged on the support structure (1), a static extrusion structure for applying static extrusion to a test piece (4), and a load for applying dynamic extrusion to the test piece (4); the test piece (4) is arranged on an extended table (3) of the exciter (2); The static extrusion structure comprises a hydraulic cylinder (5) for applying a static extrusion force to a test piece (4), and a pressing table (8) connected to the hydraulic cylinder (5); the hydraulic cylinder (5) drives the pressing table (8) to move linearly toward or away from the test piece (4) to adjust the static extrusion force on the test piece (4); the extrusion direction of the hydraulic cylinder (5) on the test piece (4) is consistent with the vibration direction of the exciter (2).

2. The vibration and extrusion composite testing device according to claim 1, characterized in that: The hydraulic cylinder (5) is arranged on the support structure (1).

3. The vibration and extrusion composite testing device according to claim 2, characterized in that: The hydraulic cylinder (5) comprises an upper oil chamber and a lower oil chamber, wherein the upper oil chamber is connected to an upper oil chamber accumulator (71), and the lower oil chamber is connected to a lower oil chamber accumulator (72).

4. The vibration and extrusion composite testing device according to claim 1, characterized in that: The hydraulic cylinder (5) is arranged on the extended table (3).

5. The vibration and extrusion composite testing device according to claim 1, characterized in that: The load (9) is arranged on the pressing table (8).

6. The vibration and extrusion composite testing device according to claim 1, characterized in that: Four hydraulic cylinders (5) are provided, and the four hydraulic cylinders (5) are evenly arranged around the pressing table (8).

7. The vibration and extrusion composite testing device according to claim 1, characterized in that: A guide member is provided on the support structure (1), and the pressing table (8) can move up and down along the guide member.

8. The vibration and extrusion composite testing device according to claim 7, characterized in that: Four guide members are provided, and the four guide members are evenly arranged around the pressing table (8).

9. The vibration and extrusion composite testing device according to claim 7, characterized in that: The guide member is configured as a guide shaft (6), a guide hole is provided on the pressing table (8), and the guide shaft (6) is arranged in the guide hole.

10. The vibration and extrusion composite testing device according to claim 3, characterized in that: The bottom of the hydraulic cylinder (5) is connected to the support structure (1), and the top of the hydraulic cylinder (5) is connected to the pressing table (8).

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