SU1481630A1 - Stand for material impact testing - Google Patents

Abstract

The invention relates to testing equipment, in particular, to devices for testing samples by repeated shock loads. The purpose of the invention is to expand the functionality by providing tests with shock loads not only of a stationary sample, but also moving with alternating acceleration and braking after impacts. The stand contains a base 1 with guides 8, an anvil 2 with a gripper 3 for sample 4, and a weight 7. To provide alternate acceleration and deceleration of the sample during repeated shocks, the means for moving the load is made in the form of a spring 9, the anvil 2 is mounted on the guides 8 and a spring 5 connected to the base, and on the basis of the stop set between 10 and the anvil. When the latch 16 is triggered, the load strikes the sample 4 and displaces it together with the anvil in the direction of impact, deforms the spring 5. The spring 5 accelerates the anvil 2 in the direction of the load. Sample 4 deals a second blow to the load 7 with the deformation of the spring 9 when the load is displaced. The load under the action of the spring deals a new blow to the sample. A series of impacts occurs during acceleration and deceleration of sample 4. For the study of impact interaction, use the second gripper 11, fixed on the load, and the second sample 12. 1 Cp. f-ly, 1 ill.

Description

The invention relates to testing equipment, to installations for impact testing.

The purpose of the invention is to expand the functionality by providing tests not only for a fixed sample, but also for moving with alternating acceleration and deceleration after impacts.

The drawing shows a diagram of a test bench for percussion testing of materials.

The stand contains a base 1, an anvil 2 with a grip 3 for sample 4, and a spring 5 connected to the anvil 2 by means of a mechanism 6 changing its tension. The load 7 is mounted on the rails 8. The spring 9 is connected at one end to the base 1, and to the other end to the load 7. On the base 1, a stop 10 fixed between the load and the anvil is fixed.

The stand is provided with a gripper 11 for mounting the second sample 12.

The load 7 and the anvil 2 have additional removable weights 13 and 14. The mechanism 15 for placing the load in the initial position is a winch with a cable, one end of which

connected to the latch 16 load. The same mechanism 17 is installed at the other end to move the anvil.

The stand works as follows.

The latch 16 is actuated and the load 7 is moved by the action of the spring 9 and hits the sample 4. When struck, the sample 4 is displaced in the direction of the impact along with the anvil 2, and the load 7 is braked by the abutment 10 Under the action of the impact pulse the anvil 2 is displaced along the guide 8 for some distance determined by the magnitude of the impulse and the stiffness of the spring 5, and then under the deformation of the spring 5 moves in the opposite direction until the sample 4 hits the load 7. Under the action of this impact, the sample 4 brakes and the load moves and stretches spring 9 for the next blow. A series of repeated shocks occur with the movements of the sample, with the acceleration of the sample upon receiving one stroke and with braking upon receiving another stroke.

 For the study of the interaction between the samples, a second sample or test 10 is placed in the gripper 11.

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my product and experiments were carried out in the manner described. In addition, each of the samples experiences a series of impacts with alternating acceleration and deceleration and with strikes on the plane of interaction between the samples. After the series of blows is damped, the loading is resumed by initiating blows from the side of another sample, for which purpose the mechanism 15 is used to initially deform the spring 5.

The parameters of the damping process are controlled by selecting the rigidity characteristics of the springs 5 and 9 and their preliminary deformation, which is controlled by initial tensioning of the springs when the mounting end of the respective springs is displaced on the load or on the anvil, as well as by selecting the inertial mass of the load and the anvil by replacing additional weights 13 and 14 .

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Claims (1)

1.Stand for shock testing of materials, containing a base with guides, an anvil with a gripper attached to it for the sample, a load mounted on the guides, a means for moving the load in the guides, a mechanism for setting the load to the initial position, with it a load clamp, a spring connected at one end to the anvil, and a spring tension mechanism, characterized in that, in order to expand the functional capabilities by providing tests not only of the stationary sample, but also moving with alternating acceleration and braking after impacts, the movement of the load is made in the form of an additional spring, one end connected to the base, the other to the load, the anvil is mounted on the guides, the main spring is connected to the base by the other end, and the stand nabzhen fixed on the basis of a focus located between the load and the anvil and designed to limit their movement towards each other, 2, Stand pop. 1, characterized in that, in order to provide a shock interaction between 314816304 two samples, it is provided with a gripping surface of the grue, shaped to for the second sample, fixed on the anvil.