A vibration, impact and acceleration test fixture for explosives

Abstract

The utility model relates to a vibration, impact and acceleration test fixture for pyrotechnic products, comprising a fixture body, a plurality of groups of symmetrically arranged locking screw holes are equidistantly provided in the middle of the surface of the fixture body, front mounting holes are provided at both ends of the surface of the fixture body, and side mounting holes opposite to the front mounting holes are provided at both ends of the outer side of the fixture body. The fixture body of the utility model uses the symmetrically arranged plurality of locking screw holes to enable the fixture body to be installed on a table for vibration, impact or acceleration tests by at least two screws, so that the pyrotechnic test product is limited and fixed, and the height is less than 50mm. Compared with square box fixtures, large square fixtures and large circular test fixtures, it is necessary to install multiple screws at the same time, pay attention to the screw installation sequence, and the installation method of pre-tightening and other processes is simpler, thereby realizing a fixture that meets the vibration, impact or acceleration test of pyrotechnic test products and saves test time.

Description

Technical Field

[0001] The utility model belongs to the technical field of pyrotechnic test, and in particular relates to a pyrotechnic vibration, impact and acceleration test fixture. Background Art

[0002] At present, the vibration test and impact test fixtures for pyrotechnic products are all carried out using square box fixtures (volume greater than 500mm*500mm*500mm), large square fixtures (volume greater than 500mm*500mm*20mm) and large circular test fixtures (radius greater than 500mm). When conducting small-scale product tests, due to the mismatch between the test fixture and the number of products (the original fixture can hold 100, but only less than 10 were installed during the experiment), the pre-test preparation time is too long and the test condition values ​​are distorted, which is not suitable for small-scale scientific research tests.

[0003] When using a square box fixture to conduct vibration and impact tests on pyrotechnics, the square box structure is relatively large. When the product is installed on the square box for testing, the transfer value will increase, and the installation method is relatively complicated (the installation sequence and pre-tightening issues need to be considered), resulting in distortion of the test condition value. At the same time, due to the limited test space of the vibration test bench, impact test bench, and acceleration test bench, the same test conditions for different products cannot be completed at one time after the square box fixture, large square fixture, and large circular test fixture are assembled, affecting the test efficiency. When assembling pyrotechnic experimental products, due to safety restrictions such as the workshop’s staffing and quantity, multiple people cannot load and unload the product at the same time, which invisibly increases the preparation time for the experiment;

[0004] On the other hand, when using square box fixtures, large square fixtures and large circular test fixtures for testing, due to their thin thickness, no symmetrical installation method is used. If the product catches fire due to quality problems during loading and unloading or testing, it will pose a safety hazard to people, other products and equipment. Based on this, it is very necessary to provide a vibration, impact and acceleration test fixture for pyrotechnics that is suitable for small and different quantitative tests. Utility Model Content

[0005] The utility model provides a vibration, impact and acceleration test fixture and a test method for pyrotechnic products, which solve the above technical problems.

[0006] In order to solve the above technical problems, the utility model provides a vibration, impact and acceleration test fixture for pyrotechnics, including a fixture body, characterized in that: a plurality of groups of symmetrically arranged locking screw holes (11) are equidistantly provided in the middle of the surface of the fixture body (1), front mounting holes (12) are provided on the upper and lower surfaces at the front and rear ends of the fixture body (1), and side mounting holes (13) are provided on the left and right surfaces at the front and rear ends of the fixture body (1) and are opposite to the front mounting holes (12).

[0007] Preferably, the side mounting hole (13) and the front mounting hole (12) have the same size.

[0008] Preferably, the sizes of the multiple locking screw holes (11) are the same.

[0009] Preferably, the multiple groups of locking screw holes (11) are an even number of pairs.

[0010] Preferably, the clamp body (1) is made of a metal material with an integrated rigid structure.

[0011] Preferably, the height of the clamp body (1) is less than 50 mm.

[0012] Preferably, the length of the clamp body (1) is not greater than 180 mm.

[0013] Preferably, the left and right surfaces and the upper and lower surfaces at the front and rear ends of the clamp body 1 are used to install accelerometers.

[0014] Preferably, the locking bolt passes through the front mounting hole or the side mounting hole to be fixed to the test bench in a limited position.

[0015] Preferably, the accelerometer is a vibration detection accelerometer, a shock detection accelerometer or an acceleration detection accelerometer.

[0016] Beneficial effects:

[0017] 1) The fixture body has multiple sets of locking screw holes symmetrically arranged, and the height is less than 50mm, so that the fixture body can be installed on the table of vibration, impact or acceleration test by at least two screws, and the pyrotechnic test product is limited and fixed. Compared with square box fixtures, large square fixtures and large circular test fixtures, multiple screws need to be installed at the same time, and attention should be paid to the installation sequence of screws, and the installation method of pre-tightening and other processes is simpler, thereby realizing a fixture that meets the vibration, impact or acceleration test of the pyrotechnic test product, saving test time, and pyrotechnic products with the same test conditions can be assembled on the same test bench for testing, further saving test time;

[0018] 2) The fixture body has a compact structure and a small size, so that multiple people can perform product loading and unloading operations at the same time under the premise of meeting the safety requirements of fixed number of people and quantity. When the fixture is used for vibration testing, impact testing, and acceleration testing of pyrotechnic experimental products, it does not need to be disassembled, saving energy and time. The fixture body is installed in a symmetrical manner to minimize damage to people, other products and equipment after fire caused by quality problems during loading and unloading or testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a cross-sectional view of the utility model;

[0021] Figure 3 This is one of the cross-sectional views of the present utility model.

[0022] In the figure: 1, clamp body; 11, locking screw hole; 12, front mounting hole; 13, side mounting hole. DETAILED DESCRIPTION

[0023] In order to make the purpose, content and advantages of the utility model clearer, the specific implementation methods of the utility model are further described in detail below.

[0024] The utility model proposes a vibration, impact and acceleration test fixture for pyrotechnics, comprising a fixture body 1, wherein a plurality of groups of symmetrically arranged locking screw holes 11 are equidistantly provided in the middle of the surface of the fixture body 1 for fixing pyrotechnics, front mounting holes 12 are provided on the upper and lower surfaces at the front and rear ends of the fixture body 1, and side mounting holes 13 are provided on the left and right surfaces at the front and rear ends of the fixture body 1 for fixing to the test table.

[0025] The fixture body 1 is made of a metal material with an integrated rigid structure and is formed by CNC processing. While ensuring the structural strength of the fixture body 1, the fixture body 1 can be standardized to reduce errors in the experimental process of pyrotechnic experiments. When the pyrotechnic experiments are transferred to the fixture body 1 through the tooling, because the height of the fixture body 1 is less than 50mm (the height is limited to 50mm), the minimum distortion can be achieved, which better meets the requirements of vibration test, impact test and acceleration test; the length is not more than 180mm, which meets the maximum size of the acceleration testing machine.

[0026] The front mounting hole 12 and the side mounting hole 13 can make the fixture body 1 be positioned with the positioning structure of the test bench or the matching pins when it is installed on the test bench. The left and right surfaces and the upper and lower surfaces of the front and rear ends of the fixture body 1 can also be used to install accelerometers for vibration experiments, impact experiments and acceleration experiments. The vibration, impact and acceleration tests of the pyrotechnic test product can be completed with the test bench, without disassembling the pyrotechnic test product to replace the experimental fixture, thereby improving the efficiency of the experiment.

[0027] The sizes of multiple locking screw holes 11 are the same, and multiple groups of locking screw holes 11 are an even number of pairs, so that the fixture body 1 can use symmetrically distributed locking bolts to pass through the front mounting holes 12 or the side mounting holes 13 to limit and fix with the test bench, wherein there can be at least two locking bolts, so that the fixture body 1 can be smoothly installed on the test bench used for vibration experiments, impact experiments and acceleration experiments. Compared with square box fixtures, large square fixtures and large circular test fixtures that need to install multiple screws at the same time and pay attention to the cumbersome processes such as screw installation sequence and pre-tightening, it is more convenient. At the same time, it avoids using square box fixtures, large square fixtures and large circular test fixtures for testing. Due to their thin thickness, they do not use symmetrical installation methods. If the product catches fire due to quality problems during loading and unloading or testing, it will leave safety hazards to people, other products and equipment.

[0028] In this embodiment, the side mounting hole 13 and the front mounting hole 12 have the same size, so that the fixture body 1 can position, reverse or flexibly install the accelerometer when performing front mounting or side mounting.

[0029] A method for testing vibration, impact and acceleration of explosive devices, comprising any one of the above-mentioned fixtures for testing vibration, impact and acceleration of explosive devices, and further comprising the following steps:

[0030] S1, using locking bolts to install the fixture body 1 on the test bench for vibration test, impact test and acceleration test, so that the test bench can adapt the fixture body 1 to perform vibration test, impact test and acceleration test on the pyrotechnic test product;

[0031] S2, using the fixture body 1 to limit and fix the pyrotechnic test product, wherein the fixture body 1 can be multiple, and multiple fixture bodies 1 can be used to complete small-scale scientific research tests on pyrotechnic test products, and can also complete large-scale factory tests, thereby improving the practicality of the fixture;

[0032] S3, use an accelerometer to record data during the experiment, obtain experimental data of vibration, impact or acceleration tests of the pyrotechnic test product, and quickly complete multiple index tests of the pyrotechnic test product. The accelerometer in step S3 is a vibration detection accelerometer, an impact detection accelerometer or an acceleration detection accelerometer, and the accelerometer is installed on the test bench, near the front mounting hole 12 or the side mounting hole 13.

[0033] In this embodiment, in the process S1 , there are at least two locking bolts for locking the clamp body 1 .

[0034] Specifically, two locking bolts are used to quickly fix the clamp body 1 and also make the installation operation of the clamp body 1 easier.

[0035] In this embodiment: when the pyrotechnic test product in S1 is limited and fixed, the pyrotechnic test product is symmetrically installed between adjacent fixture bodies 1.

[0036] Specifically, a symmetrical installation method is used to minimize damage to people, other products, and equipment after a fire caused by quality problems during loading, unloading, or testing (if a product goes off, only the two symmetrically installed products are affected, and the others are not affected), ensuring the safety of the experiment.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A vibration, impact and acceleration test fixture for explosives, comprising a fixture body, characterized in that: The middle part of the surface of the clamp body (1) is provided with a plurality of symmetrically arranged locking screw holes (11) at equal intervals, the upper and lower surfaces of the front and rear ends of the clamp body (1) are provided with front mounting holes (12), and the left and right surfaces of the front and rear ends of the clamp body (1) are provided with side mounting holes (13) opposite to the front mounting holes (12).

2. The vibration, impact and acceleration test fixture for explosive devices according to claim 1, characterized in that: The side mounting hole (13) has the same size as the front mounting hole (12).

3. The vibration, impact and acceleration test fixture for explosive devices according to claim 1, characterized in that: The sizes of the multiple locking screw holes (11) are the same.

4. The vibration, impact and acceleration test fixture for explosive devices according to claim 1, characterized in that: The plurality of sets of locking screw holes (11) are even-numbered pairs.

5. The vibration, impact and acceleration test fixture for explosive devices according to claim 1, characterized in that: The clamp body (1) is made of a metal material with an integrated rigid structure.

6. The vibration, impact and acceleration test fixture for explosive devices according to claim 1, characterized in that: The height of the clamp body (1) is less than 50 mm.

7. The vibration, impact and acceleration test fixture for explosive devices according to claim 1, characterized in that: The length of the clamp body (1) is no more than 180 mm.

8. The vibration, impact and acceleration test fixture for explosive devices according to claim 1, characterized in that: Accelerometers are installed on the left and right surfaces and the upper and lower surfaces of the front and rear ends of the fixture body.

9. The vibration, impact and acceleration test fixture for explosive devices according to claim 1, characterized in that: The locking bolt passes through the front mounting hole or the side mounting hole to limit and fix the test bench.

10. The vibration, impact and acceleration test fixture for explosive devices according to claim 8, characterized in that: The accelerometer is a vibration detection accelerometer, a shock detection accelerometer or an acceleration detection accelerometer.

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