SU754240A1 - Impact testing stand - Google Patents

Description

The invention relates to test equipment, namely, stands for impact testing.

A test bench for shock tests is known, comprising a housing, a rotor, a holder mounted on a rotor, a holder inserted into the holder, a barrel mounted at the outlet of the trunk of an anvil, a hollow cylinder mounted in the housing with the possibility of moving along the rotor axis and having on the inner surface of the annular groove to enter into the striker, turning into a screw groove to move the striker 15

in the barrel M ·

The disadvantage of this stand is the complexity of the design.

The closest in technical essence to the invention is 20

impact test stand containing a head, base for placing the striker in the initial position, drive for accelerating the striker, made in the form of an annular stator with windings 25 for creating a rotating magnetic field, a screw guide for the striker, a barrel for withdrawing the striker and placed at the outlet of the anvil . The stator is placed on the base and gesture- 30

2

it is fastened to it, and the stator windings cover the entire screw guide [2].

The disadvantage of this stand is the low impact energy "as the bob, accelerated by the rotating magnetic field, immediately falls into the screw guide without reaching the necessary speed before that.

The purpose of the invention is to increase the impact energy.

This is achieved by the fact that the base is placed inside the stator and provided with a drive for moving it along the axis of the stator, and the stator windings are located before the beginning of the screw guide.

In addition, the stand is equipped with a treadmill installed inside the stator of a diamagnetic material whose height is equal to the height of the stator windings, and the inner diameter is chosen from the condition of a smooth striking of the striker from the treadmill to the screw guide.

FIG. 1 shows a stand, view

from above; in fig. 2 - saying AA

FIG. one.

The stand contains the striker 1, made, for example, from ferromagnetic

3

754240

material, base 2 for placing the striker 1 in the initial position, drive for accelerating the striker 1 in the form of an annular stator 3 with windings 4 for creating a rotating magnetic field, a screw guide 5 for striker 1, a barrel 6 for outputting the striker 1 located at the output of the barrel 6 anvil 7. Base 2 is placed inside the stator of the 3rd st supplied with a drive (not shown) to move it along the axis of the stator 3, and the winding 4 of the stator. 3 are located before the start of the screw guide 5. The described stand also contains a treadmill 8 made of diamagnetic material installed inside the stator, the height of which is equal to the height of the windings 4 of the stator 3, and the inside diameter is chosen from the condition of smooth striking of the striker 1 from the treadmill 8 to the screw guide 5. The treadmill 8 is made of a diamagnetic material in order not to affect the interaction forces of the magnetic field with the striker 1.

The stand works as follows. When voltage is applied to the windings

4 stator 3 is excited, a rotating magnetic field that captures the firing pin 1 from the base 2. When the rotating magnetic field of the stator 3 interacts with the striker 1, there are forces that force the firing pin 1 to move in the direction of rotation of the magnetic field and under the action of centrifugal forces treadmill 8. Punch 1 runs around it, accelerating to a given speed. When the required acceleration speed is reached, the base 2 with the striker 1 moves * along the axis of the stator 3 upwards until the striker 1 is gripped by the screw guide 5, after which the striker 1 is led out into the barrel .6, where it collides with the anvil 7. At this time position. Bounced off

From the anvil 7, the hammer 1 returns to base 2 and is inhibited by a rotating counter magnetic field. Then the cycle repeats.

The impact energy is increased due to the fact that the hammer 1 accelerates to a predetermined speed and only then with the help of the movable base 2 is led into the screw guide 5. The reliability of the stand is enhanced by the presence of a treadmill 8 that prevents direct contact of the hammer 1 with the stator 3.

Claims (2)

Claim 1. Stand for impact tests, containing the hammer, the base for placing the striker in the initial position, the drive for accelerating the striker, made in the form of an annular stator with windings to create a rotating magnetic field, a screw guide for the striker, a barrel for removing the striker and an anvil located at the exit of the barrel, characterized in that, in order to increase the impact energy, the base is placed inside the stator and is equipped with a drive for moving it along the axis of the stator, and the stator windings are located before the beginning of the screw guide. 2. Stand pop.1, characterized in that, in order to increase reliability, it is equipped with a treadmill installed inside the stator of diamagnetic material, the height of which is equal to the height of the stator windings, and the inner diameter is chosen from the condition of a smooth striking of the striker from the treadmill into the screw guide .