CN108827572A - A kind of vibration impact experiment fixture of more part combination body products - Google Patents

Abstract

The invention discloses a vibration shock test fixture for a multi-part assembly product, comprising a hollow fixture body (1), the bottom surface of the fixture body (1) being a fixture installation surface (2), used for connecting to an external vibration shock test The vibrating table top of the platform; the fixture main body (1) has a plurality of product installation surfaces, and each product installation surface is used to install products that need to carry out vibration and shock tests; the multiple product installation surfaces have different clips from the horizontal plane respectively. horn. The invention provides a disclosed vibration and shock test fixture for a multi-part assembly product, which can effectively connect and fix a plurality of different parts included in an assembly product, so as to meet the requirements for multiple parts included in the same assembly product. At the same time, the fixed demand of vibration test saves precious test time and test cost, improves the quality of vibration shock test, is conducive to wide application, and has great practical significance in production.

Description

A vibration and shock test fixture for a multi-part assembly product

technical field

The invention relates to the technical field of vibration tests, in particular to a vibration shock test jig for a multi-part assembly product.

Background technique

At present, the equipment, fasteners and other products installed on rail vehicles such as trains will cause random vibration excitation as the vehicle is subjected to frictional resistance and the operation of the engine accelerates during the travel of rail vehicles such as trains. Therefore, it is necessary to conduct vibration and shock tests on a large number of equipment and fasteners on rail vehicles to assess the structural fatigue strength of the equipment, that is, whether it will cause fatigue failure or damage due to the simulation of the actual use environment.

In order to meet the vibration and shock requirements of the product in the laboratory, technicians usually design the corresponding fixture to complete the test, fix the test product on the existing vibration and shock test bench through the fixture, and run the vibration and shock test bench to realize the simulated vibration shocking environment.

However, in the prior art, there is a large demand for vibration and shock fixtures for clamping test products, and different fixtures need to be designed correspondingly according to the shape, size, strength, etc. of different test products, so that when multiple parts are formed In the vibration and shock test of composite products, it is often necessary to design multiple fixtures to realize the vibration and shock test of all parts, which requires a lot of manpower, material resources, financial resources and time, resulting in a significant increase in the cost of vibration tests.

In addition, a plurality of test fixtures are likely to have different manufacturing qualities, which will increase the error of the finally obtained vibration shock data.

It should be noted that if the product is damaged only due to the vibration test, relevant personnel can make subsequent improvements to the product, which is one of the purposes of the vibration shock test. However, if different fixtures are replaced many times to perform vibration and shock tests on different parts of a combined product, relevant personnel may misjudge the damage of the product and make improvements, which will undoubtedly waste a lot of time, money and resources; moreover, all previous experiments need to be reset to zero, and the experiment must be re-tested, which greatly increases the cost of the experiment.

Therefore, there is an urgent need to develop a fixture that can effectively connect and fix multiple different parts included in a combined product, so as to meet the fixing requirements for simultaneous vibration tests of multiple parts included in the same combined product , save precious test time and test cost, and improve the quality of vibration shock test.

Contents of the invention

In view of this, the object of the present invention is to provide a vibration and shock test fixture for a multi-part assembly product, which can effectively connect and fix a plurality of different parts included in an assembly product, thereby satisfying the requirements for the same assembly product. The fixed requirement of multiple parts included in the vibration test at the same time saves precious test time and test costs, improves the quality of vibration and shock tests, is conducive to wide application, and has great practical significance in production.

For this reason, the present invention provides a kind of vibration shock test fixture of multi-part assembly product, comprises hollow fixture main body,

The bottom surface of the fixture body is a fixture installation surface, which is used to connect the vibrating table surface of the external vibration and shock test bench;

The main body of the fixture has a plurality of product installation surfaces, and each product installation surface is used to install a product that needs to be subjected to a vibration shock test;

The plurality of product installation surfaces respectively have different included angles with the horizontal plane.

Wherein, the fixture main body is a hollow cuboid structure.

Wherein, the clamp body has only one clamp installation surface.

Wherein, the fixture installation surface is fixedly connected with the vibrating table surface of the external vibration shock test bench through fasteners.

Wherein, the fastener includes a bolt and nut assembly.

Wherein, each product installation surface has a connector, and the product installation surface is fixedly connected to the product to be subjected to the vibration shock test through the connector.

Wherein, the clamp body has a first product installation surface, a second product installation surface, a third product installation surface, a fourth product installation surface, a fifth product installation surface and a sixth product installation surface, wherein:

The first product installation surface is located on the upper part of the left inner wall of the clamp body;

The second product installation surface is the left outer surface of the fixture main body;

The third product installation surface is the top surface of the clamp body;

The fourth product installation surface is the upper part of the right outer wall of the fixture main body;

The fifth product installation surface is located in the middle of the right outer wall of the clamp body;

The sixth product installation surface is located at the lower part of the right outer wall of the clamp body.

Wherein, the top surface and the bottom surface of the fixture main body are parallel to each other, and both are horizontal planes.

It can be seen from the technical solution provided by the present invention above that, compared with the prior art, the present invention provides a vibration and shock test fixture for a multi-part assembly product, which can effectively test a plurality of different parts included in an assembly product. The connection is fixed, so as to meet the fixed demand for simultaneous vibration tests of multiple parts included in the same composite product, save valuable test time and test costs, improve the quality of vibration and shock tests, and facilitate wide application. production practice.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the vibration impact test fixture of a kind of multi-part assembly product provided by the present invention;

Fig. 2 is the schematic structural view of the connector in the vibration shock test fixture of a kind of multi-part assembly product provided by the present invention;

In the figure, 1 is the main body of the fixture, 2 is the mounting surface of the fixture, 4 is the connector, 5 is the fixed connection point, and 6 is the connection hole;

31 is the first product installation surface, 32 is the second product installation surface, 33 is the third product installation surface, 34 is the fourth product installation surface, 35 is the fifth product installation surface, 36 is the sixth product installation surface 36.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to Fig. 1 and Fig. 2, the present invention provides a vibration shock test fixture for a multi-part assembly product, including a hollow fixture main body 1,

The bottom surface of the fixture body 1 is a fixture installation surface 2, which is used to connect the vibrating table surface of the external vibration shock test bench;

There are multiple product installation surfaces on the fixture body 1, and each product installation surface is used to install a product that needs to be subjected to a vibration and shock test (for example, it may be a part included in the combined product);

The multiple product installation surfaces have different included angles with the horizontal plane respectively, that is to say, the multiple product installation surfaces are not parallel to each other.

In the present invention, in terms of specific implementation, the fixture main body 1 is a hollow cuboid structure.

In the present invention, specifically, the fixture body 1 has only one fixture installation surface 2 .

In the present invention, in terms of specific implementation, the fixture installation surface 2 is fixedly connected to the vibrating table surface of the external vibration shock test bench through fasteners.

In terms of specific implementation, the fastener includes a bolt and nut assembly, and may also be other structures capable of fast fixing.

In the present invention, in terms of specific implementation, each product installation surface has a connecting piece 4, and the product installation surface 2 is fixedly connected to the product that needs to be subjected to a vibration shock test through the connecting piece 4.

Referring to FIG. 2 , the connector 4 is fixedly connected to the product mounting surface on the fixture main body 1 through four screws, and the product (ie, the test piece) to be subjected to a vibration and shock test is fixedly connected to the connector 4 through screws.

In terms of specific implementation, the connecting piece 4 is a replaceable adapter designed as a replaceable connecting piece, the purpose of which is to replace the connecting piece when performing test pieces of different specifications and models in similar products, while the fixture main body 1 does not need to be replaced , saving costs, high efficiency, and improving the uniformity of test quality.

Specifically, the connector 4 has four fixed connection points 5 for fixed connection with the fixture main body 1, and the connector 4 has four connection holes 6, and the four connection holes 6 are vibrated by screws respectively. The product of the impact test (ie the test piece) is fixedly connected.

In the present invention, specifically, the clamp body 1 has at least four product mounting surfaces.

In terms of specific implementation, the clamp body 1 has a first product installation surface 31, a second product installation surface 32, a third product installation surface 33, a fourth product installation surface 34, a fifth product installation surface 35 and a sixth product installation surface. Side 36, of which:

The first product installation surface 31 is located on the upper part of the left inner wall of the clamp body 1;

The second product installation surface 32 is the left outer surface of the fixture main body 1;

The third product installation surface 33 is the top surface of the fixture main body 1;

The fourth product installation surface 34 is the upper part of the right outer wall of the clamp body 1;

The fifth product installation surface 35 is located in the middle of the right outer wall of the clamp body 1;

The sixth product installation surface 36 is located at the lower part of the right outer wall of the clamp body 1 .

In the present invention, in terms of specific implementation, the top surface and the bottom surface of the fixture main body 1 are parallel to each other, and both are horizontal planes.

It should be noted that, referring to Figure 1, for the present invention, the six product mounting surfaces can be used to install multiple products in different directions and angles respectively, and with the external vibration shock test bench, multiple products can vibrate at the same time (At this time, the vibration test conditions in each direction are the same, and they all vibrate under the drive of the same external vibration shock test bench).

In terms of specific implementation, the connection between the table top of the external vibration and shock test bench and the main body of the fixture is installed through a number of screws that match the mounting holes of the table top of the vibration shock test bench. When the six parts included in a combination are installed on On the above-mentioned six product installation surfaces of the present invention, after the test in one direction is completed, the data of parts at different positions of the combined test piece can be obtained. In addition, for the present invention, it is only necessary to remove the screws connected to the table of the vibration shock test bench, then turn over the main body of the fixture and tighten the screws as described above, that is, the task of changing direction is completed, which is simple and efficient.

It should be noted that, for the present invention, the fixture main body is a cuboid, with seven surfaces (one fixture installation surface and six product installation surfaces), using 50mm×50mm square steel, which can not only ensure the transmission of vibration force, but also ensure the transmission of vibration force as much as possible. reduce the weight of the fixture.

It should be noted that, in terms of specific implementation, the vibration and shock test bench can be any existing test bench that can perform vibration and shock tests on the fixture.

It should be noted that, in the test carried out using the fixture of the present invention, the vibration shock table used can be a digital electric vibration table produced by Beijing Aerospace Hill Testing Technology Co., Ltd., and the specific model used can be: MPA712/M544A or MPA3324/H1248A. The fixture can be adapted to any existing test bench capable of performing vibration and shock tests through the fixture installation surface 2 .

It should be noted that the test fixture provided by the present invention is mainly used for fire smoke detection on rail transit equipment and vibration shock test of water mist fire extinguishing system.

It should be noted that, compared with the prior art, since the fixture of the present invention is provided with multiple product installation surfaces, various product installations and tests can be performed by replacing different connectors. By setting multiple fixture mounting surfaces, it can cooperate with the existing vibration test bench to carry out the vibration shock test of the combined product composed of multiple parts with different angles at the same time, so as to cooperate with the vibration shock test bench to efficiently and accurately obtain multi-part composite test pieces The vibration response of each position, thus greatly saving the test time and cost, improving the work efficiency and the accuracy of data collection. The vibration force transmission of the vibration fixture provided by the invention is reasonable, improves the quality of the vibration test, and can effectively solve the problems of high test cost, time-consuming, and difficult unification of fixtures in the existing vibration shock test.

In summary, compared with the prior art, the present invention provides a vibration shock test fixture for a multi-part assembly product, which can effectively connect and fix a plurality of different parts included in an assembly product, thereby satisfying The fixed demand for simultaneous vibration testing of multiple parts included in the same assembly product saves valuable testing time and testing costs, improves the quality of vibration and shock testing, and is conducive to wide application, which has great practical significance in production.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (8)

1. A vibration shock test fixture for a multi-part assembly product, characterized in that it comprises a hollow fixture main body (1), The bottom surface of the fixture main body (1) is a fixture installation surface (2), which is used to connect the vibrating table surface of the external vibration and shock test bench; The fixture main body (1) has a plurality of product installation surfaces, and each product installation surface is used to install a product that needs to be subjected to a vibration shock test; The plurality of product installation surfaces respectively have different included angles with the horizontal plane. 2. The vibration shock test fixture according to claim 1, characterized in that, the fixture main body (1) is a hollow cuboid structure. 3. The vibration shock test fixture according to claim 1, characterized in that, the fixture main body (1) has only one fixture installation surface (2). 4. The vibration shock test fixture according to claim 1, characterized in that, the fixture installation surface (2) is fixedly connected with the vibrating table surface of the external vibration shock test bench through fasteners. 5. The vibration and shock test fixture according to claim 4, wherein the fastener comprises a bolt and nut assembly. 6. The vibration and shock test fixture according to claim 1, characterized in that, each product mounting surface has a connector (4), and the product mounting surface (2) needs to be vibrated and impacted through the connector (4). The tested product is permanently connected. 7. The vibration shock test fixture according to any one of claims 1 to 6, characterized in that, the fixture main body (1) has a first product installation surface (31), a second product installation surface (32) , the third product installation surface (33), the fourth product installation surface (34), the fifth product installation surface (35) and the sixth product installation surface (36), wherein: The first product installation surface (31) is located on the upper part of the left inner wall of the clamp body (1); The second product installation surface (32) is the left outer surface of the fixture main body (1); The third product installation surface (33) is the top surface of the clamp body (1); The fourth product installation surface (34) is the upper part of the right outer wall of the clamp body (1); The fifth product installation surface (35) is located in the middle of the right outer wall of the clamp body (1); The sixth product installation surface (36) is located at the lower part of the right outer wall of the clamp body (1). 8. The vibration shock test fixture according to any one of claims 1 to 6, characterized in that, the top surface and the bottom surface of the fixture main body (1) are parallel to each other, and both are horizontal planes.