RU1793325C - Dynamical test bed for material specimen - Google Patents

Abstract

The invention relates to a test technique. The purpose of the invention is to expand functionality by adjusting during testing the ratio of time intervals between loading steps in cycles. The stand comprises a drive platform 2 with a drive guide, loads 6, a rigid ring 7, grips 8 and 10 of sample 9, clips 11, devices for pressing the drives to the platform and the guide, 2 yl,

Description

The invention relates to testing equipment, namely, impact testing of materials and products samples.

A test bench for dynamic testing of samples is known, comprising a base, an annular guide mounted thereon, loads mounted on the guide, active grip of the sample associated with the weights, and passive grip.

The disadvantage of the stand is that the tests are carried out only at compressive loads without adjusting the time intervals between the loads,

Closer in design and the achieved positive effect to the proposed one is a stand for dynamic testing of samples, which contains a base, a platform mounted on it, a platform rotation drive, an annular guide, an annular guide rotation drive, loads mounted on the platform along an annular guide, a cargo coupling, an active sample grip associated with the coupling, and a passive grip secured to the rail.

The disadvantage of the test bench is that it is not feasible to test the control during the test of the ratio of the time intervals between the loading steps in cycles.

In the proposed stand, the connecting element is made in the form of a rigid ring, the loads are made with holes through which the rigid ring passes, and the installation is equipped with load clamps relative to the rigid ring.

In FIG. 1 shows the proposed stand, top view; in FIG. 2 - the same side view.

The test bench for dynamic testing of samples contains a base 1, a platform 2 mounted on it, a platform rotation drive 3, an annular guide 4, an annular guide 4 rotational drive 5, loads b mounted on the platform with the possibility of moving along the annular guide, a connecting element 7 for cargo, active capture 8 of sample 9, associated with the connecting

element, and a passive grip 10, mounted on a guide 4.

The connecting element 7 is made in the form of a rigid ring, weights 6 are made with

holes through which the rigid ring passes. The stand is equipped with clamps 11 of cargo 6 relative to the rigid ring 7 and has devices 12 and 13 for pressing the actuators 3 and 5, respectively, to the platform and

guide. These devices are made in the form of core with coils. The latches 11 are electromagnetic and coupled to a control unit (not shown). The control unit ensures the fixation of goods on

ring at the moment of collision of cargoes and the release of cargoes in their given position on the platform.

The stand works as follows. Drive 5 is turned on and accelerated to

set rotation speed. Turn off the latches. 11 weights at the end 7. Turn on the coil of the device 13 and by moving the core together with the drive 5 press the drive roller to the surface

guide 4 and drive it into. rotation. The guide 4 moves the grippers 8, 10 with the sample 9. An impact occurs with the weights 6 and the stepwise loading of the sample 9 with compressive forces. In the moment

collision with the next load, its latch 11. is activated and connects the load to the ring 7. After collision with all the loads turn off the device 13, turn on the drive 3, the device 12. Rotate

the platform 2 at a speed greater than the speed of rotation of the guide 4. The load locks 11 are turned off alternately and by disconnecting the loads with the ring 7, the loads are placed on the platform at predetermined distances from each other. New distances between the loads are set taking into account the new ratio between the time intervals during loading by compressive forces. The loading is repeated as described.

The test bench allows testing in a new mode - by adjusting the time intervals between loading steps in repeated loading, which is not feasible on known test benches of step loading with the action of centrifugal force on the test sample (product).

Claims (1)

Formula invented and A stand for dynamic testing of material samples, comprising a base, a platform mounted on it, a platform rotation drive, an annular guide, an annular guide rotation drive, loads mounted on a platform with the ability to move along the annular guide, a cargo connecting element, an active grip of a sample connected to the connecting element, and a passive grip fixed to the guide, characterized in that, in order to expand the functionality by providing tests when adjusting during the test the ratio of the time intervals between the loading steps in cycles, the connecting element is made in the form of a rigid ring, the loads are made with holes through which the rigid ring passes, and the installation is equipped with load clamps relative to the rigid ring.