SU1411597A1 - Bed for impact tests - Google Patents

Abstract

This invention relates to shock test benches. The purpose of the invention is the expansion of functional capabilities. The stand contains a base 1 with guide posts 2, on which the inductor 4 and the hollow cylinder 11 are fixed.

Description

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The injector 4 houses an accelerating element 7 with a screened container 8, between which and the base 1 a platform 9 made of ferromagnetic material is installed, having the possibility of axial movement along the guide posts 2 and fixing with the help of electromagnets 23 fixedly placed on the guide stands 2. Pops the cylinder 11 is placed a brake device in the form of a piston 12 and a rod 14 connected with it, which is connected to the accelerating element 7 and the shielding container 8, the platform 10 houses the test object 10, the platform 9 in simulates with pneumatic brake 25; Returning the platform 9 to its initial position is carried out with the help of a lifting device 33 with a hook 34; Object 10 is subjected to shock testing during the transmission of an electromagnetic pulse from the inductor 4 to the accelerating element 7 and at the end of the course of the platform 9 during its interaction with air brake. 1 hp f-ly, 1 ill.

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The invention relates to a test technique, namely, test benches for impact testing, mainly elements of electrical and radio equipment.

The purpose of the invention is to expand the technological capabilities by increasing the kinematic parameters of the movement.

The drawing shows the stand for y (ary tests, general view.

The test bench contains a base 1 with guide posts 2 fixed to it. At the free ends 3 racks 2 are fixed

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a pulsed electromagnet inductor 4 with a central opening 5, in which there is an insert 6. On the inductor 4 from the base 1 coaxially with it there is an accelerating element 7 with a shielding container | w container 8 between which and the base 1, a platform 9 is installed, having the possibility of axial movement along guide posts 2 and fixation in the initial position. The tatforma 9 is intended to fix the test object 10 on it. On the inductor 4, a hollow 11 is fixed, in which a torus-mounted device, made in the form of a mold 12 with a bypass hole-13, is placed in the cavity of the cylinder 11 and connected to the piston 12 of the rod 14. The piston 12 divides the cavity of the cylinder 11 on brake 15 and damping then 16 cameras. The piston 12 is axially spring-loaded relative to the inductor 4 by the return spring 17. The rod 14 is placed in the sleeve 6 and connected to the accelerating element 7 and the shielding container 8 which can be axially moved along guides formed by the surfaces 18 and 19 of the sleeve 6 and the rod 14 and surfaces 20 and 21 of cylinder 11 and pressure 12, respectively.

On the guide posts 2, the crossbar 22 is fixedly mounted, on which electromagnets 23 are placed, intended for fixing the platform 9 with the test object 10 in the initial position.

0 On the crossbar 22. There is also a shock absorber 24, designed to absorb the energy of the accelerating element 7 in an emergency (breakage of the spring 17).

five . On the base 1, a pneumatic brake 25 is installed, on which the platform 9 strikes with the test object 10.

The stand also contains a battery 26

0 capacitors with power source 27, switch 28 for connecting inductor 4 to capacitor battery 26, time relay 29, giving a signal to switch 28, starting relay 30, including time relay 29 when the Start button 31 is pressed.

The electromagnets 23 are powered from a source 32.

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To return and install the platform 9 to its original position, a lifting device 33 and a chain 34 and a pusher 35 is placed on the stand. The lifting device 33 moves along the trimming bar 36 as the single screw 37 is rotated by the motor 38.

The test bench is designed as follows.

The test object 10 is secured on the platform 9, which is in its initial moment in the lowest position. When the engine 38 is turned on, the lead screw 37 rotates, and the lifting device 33, moving upwards along the guide bar 36, with its hook 34 also moves up the platform 9 with the test object 10 until the platform 9 stops against the shielding container 8. Test object 10 gets inside the shielding container 8, which together with the platform 9 forms a shielded chamber.

In the extreme upper position, the lifting device 33 with its pusher 35 includes a power supply 32 of electromagnets 23, which hold the platform 9 with the object 10 to be tested,

Simultaneously with switching on the power supply 32 of the electromagnets 23, the motor 38 is switched, and the lifting device 33 returns to its lowest position.

When a voltage is reached in the battery 26 of a given capacitor corresponding to the required acceleration value at which object 10 is required to test, the Start button 31 is pressed, the starting relay 30 is triggered, which turns on the time relay 29, which supplies a signal to the switch 28, which connects the inductor 4 to the battery 26 capacitors.

The battery 26 is discharged and the impulse electromagnet inductor 4 is excited, whose energy is transferred to the accelerating element 7 and the shielding container 8, and from the latter to the platform 9 with the test object 10, which begin to move with a predetermined acceleration. power supply 32 of electromagnets 23, holding the platform 9.

Since the accelerating element 7 and the shielding container 8 are connected to the rod 14, accelerated

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moving the rod 14 in the sleeve 6 and the piston 12 in the hollow cylinder 11. As the piston 12 moves, the spring 17 is compressed and the air in the brake chamber 15 is partially vented through the bypass holes 13 into the damping chamber 16, resulting in first deceleration, and then stopping and returning to the initial position of the piston 12 and associated with it through the rod 14 of the accelerating element 7 and the shielding container 8. The return is realized by the return spring 17 - smoothly due to the release of air from the damping chamber 16 into tons The brake chamber 15 through the bypass holes 13.

Claims (2)

After stopping the accelerating element 7 and the shielding container 8, the platform 9 with the test object 10 continues to move downward with acceleration. Until it strikes the brake 25. After the impact, the platform 9 is braked and stopped with the test object 10 in the lowest position. Test object 10 is removed from platform 9, and another one is placed in place of it if necessary. Then the cycle repeats the Formula 1 of the Invention. The test bench for the shock tests, containing the base, is the inductor in the form of a pulsed electromagnet with a central. hub, capacitor battery, switch for connecting the inductor to the battery, braking device, direction and mounted on the inductor with the possibility of axial movement along the guides of the accelerating element with the shielding container for the test object, different in that, in order to expand technological capabilities, it is equipped with guide posts fixed on the basis and installed between the base and the shielding container with the possibility of axial movement of about the guide posts and the fixing platform, and an inductor is placed at the free ends of the guide bars. 2. A stand according to claim 1, characterized in that the platform is made of a ferromagnetic material, and its clamps are in the form of electromagnets attached to guide racks on the side of the accelerating element.