High-magnitude clash impact testing stand

Abstract

The invention discloses a high-magnitude clash impact testing stand, comprising a base. The base is provided with a first thrust device and a second thrust device, the first thrust device and the second thrust device are respectively connected with an impact push plate, the two impact push plates are oppositely arranged for providing impact power to impact components located between them, and theimpact energy of the impact push plates is separately controlled by the thrust devices connected thereto. The front and rear sides of the first thrust device and the second thrust device are respectively provided with reset devices for returning the impact components to the original position, the base is further provided with a slide rail, the slide rail is located between the first thrust deviceand the second thrust device, and the impact components are slidably connected with the slide rail. The size of the stand body is reduced, the lightweight design and the automatic reset operation arerealized, the impact amplification of clash is achieved, minimal impact on the stand body and the foundation is small, the large-sized and large-quality test products can be effectively loaded, and the practicality is strong. The high-magnitude clash impact testing stand is worth popularizing.

Description

technical field [0001] The invention belongs to the field of dynamic tests, and in particular relates to a large-mass, high-acceleration, long-duration high-level collision impact test bench for fuzes, ammunition, spacecraft and other high-reliability products in a laboratory environment. Background technique [0002] Fuzes, ammunition, and spacecraft products are usually accompanied by high mechanical shock environments during their work. Therefore, various targeted dynamic mechanical shock tests need to be carried out in the process of scientific research, production, and use to assess their performance in high shock environments. Survivability, function realization and dynamic performance. [0003] In the laboratory, the shock test completed by the shaking table is mainly used for the simulation of low-level complex shock environments below 200 times the acceleration of gravity. [0004] Machete hammer machine, drop impact test bench, purely mechanical impact amplificati...

AI Technical Summary

Problems solved by technology

[0004] Machete hammer machine, drop impact test bench, purely mechanical impact amplification device and secondary impact device are all mechanical devices that use collision kinetic energy to generate high overload. Usually, they can only achieve relatively small mass test products below 2Kg. Large impact acceleration, but also has the disadvantages that the collision energy is not easy to set and control, and the collision acceleration spreads greatly

[0005] The air cannon is a commonly used strong impact test device in the laboratory. It uses compressed air as the power source. The high-pressure air chamber is released instantly to accelerate the test projectile in the launch tube to simulate the launch environment. In order to obtain higher initial launch velocity and acceleration overload, usually It is necessary to increase the length of the launch tube and reduce the quality of the test projectile. In addition, affected by the caliber of the air cannon, the air cannon test can usually only be tested on small-sized, low-mass products, and the air-tight test environment of the air cannon usually needs to be tested The product can be stored and tested, and the external wire test cannot be used, which increases the cost and complexity of the test

[0006] Pneumatic shock table is another kind of impact test device commonly used in laboratories. Taking horizontal pneumatic shock table as an example, it usually consists of table body, impact cylinder, sliding work surface, slide rail, limit baffle, wave gasket, etc. Driven by air pressure, the piston rod of the cylinder pushes the worktable to accelerate on the slide rail, and the sliding worktable hits the waveform generator on the limit baffle to generate a corresponding impact waveform. However, due to the large mass of the cylinder piston rod, the cylinder piston The movement speed is low, usually around 10m / s~20m / s, the limit value is 30m / s, and the impact energy is limited

In addition, the mechanical impact overload is caused by the impact of the sliding worktable and the fixed test product on the wave gasket on the limit baffle of the impact table. With the increase of the impact level, the impact force of the impact table itself also increases year-on-year. The limited mechanical strength of the impact table itself restricts the application of large-mass test products on the horizontal pneumatic impact table

[0007] At present, the impact test level of fuzes, ammunition, spacecraft and some high-reliability products requires a high-volume test with a peak value of not less than 1000 times the acceleration of gravity and a duration of not less than 1 ms for larger mass test products of tens to hundreds of kilograms. Level impact test, the existing laboratory test technical conditions can not meet the demand, resulting in insufficient assessment in the process of laboratory impact test, can not fully expose product design and manufacturing defects

[0008] At present, the mechanical impact test in the laboratory environment has the problems of insufficient impact energy such as light load, low peak acceleration, and short impact duration, while the shelling test in the field has the problems of high test cost and difficult test recovery

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