RU1803802C - Bench for testing specimens with stepped impact load - Google Patents

Abstract

The invention relates to a testing technique, and in particular, to test benches for testing samples with stepwise shock loading. The purpose of the invention is to expand the functionality by providing tests under torsion loading both in conjunction with axial load and independently of axial load. The stand comprises a base 1, a flywheel 2, a rod 3. grippers 4, 5 of a sample 6, a guide 7, weights 9, elastic elements 12, a drive 13 for a rotational movement. 3 ill.

Description

The invention relates to testing equipment, to strength tests,

The goal is achieved in that the stand is provided with a drive of the rotational movement of the guide around its axis, and the elastic element is installed between the rod and the passive grip.

In FIG. 1 shows a diagram of the installation, a General view; in FIG. 2 - section along the plane AA; in FIG. 3 - section along the plane BB.

The test bench for samples with a stepwise shock load comprises a base 1, a loading device with a flywheel 2 and a rod 3 mounted with the possibility of pressing against the flywheel 2, passive 4 and active 5 grips of sample 6, guide 7 in the form of a pipe with a plug and with a longitudinal slot 8 mounted coaxially to the rod 3, weights 9 for interacting with the active gripper 5, mounted in the guide with the ability to move along it, a passive gripper 4 associated with the rod 3, rollers 10, 11 mounted on the active gripper and on loads and location in a slot guideway 8, and an elastic member 12 for engagement with a passive gripper.

The stand is equipped with a drive 13 of the rotational movement of the guide around its axis, and the elastic element 12 is installed between the rod 3 and the passive gripper 4.

The drive of the rotary movement of the guide is made in the form of wheels 13, 14 with friction pads 15, wheels 16 connected to the guide 7 and frictionally interacting with the pads 15, drive 17. and the transmission 18 of the counter-rotation of the wheels 13, 14. The elastic element 12 made in the form of springs, one. the end fixed on the passive grip 4, and the other fixed on the rod 3. W tangaZ is pressed against the flywheel 2 with the device 19, the flywheel is rotated by the drive 20., The stand works as follows.

To load the sample with cyclic alternating torque loads, the drive 17 and via wheels

13, 14 with friction linings 15 rotate the wheels 16 and the guide 7 back and forth. Together with guide 7, these movements are

active grip 5 and sample 6 with grip 4. Springs 12 convert these rotations relative to the rod 3 into an alternating torsional load on the sample. For tests with stepwise axial loading

of the sample include the actuator 20, the flywheel 2 is accelerated and the rod 3 is pressed with the fixture 19 to the surface of the flywheel. The rod moves along the axis of the guide, the gripper 5 interacts with the loads 9 and stepwise loads the sample 6. The combination of torque and axial loads is carried out in accordance with the test program.

The bench allows testing under new conditions - when loading with an alternating torque load, either in conjunction with the axial load, or before or after the interaction of the axial load.

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Claims (1)

The claims A test bench for samples with a stepwise shock load, containing a base, a loading device, with a flywheel and a bar mounted with the possibility of pressing it against the flywheel, passive and active grips of the sample, guiding in the form of a pipe with a plug and with a longitudinal slot, mounted coaxially with a bar, weights for interacting with an active gripper, installed in the Guide with the ability to move along it, a passive gripper associated with the bar, rollers mounted on a passive gripper and on loads, and positioned a guide rail and an elastic element for interacting with a passive grip, characterized in that, in order to expand the functionality by providing tests under toughness both jointly with axial load and independently of axial load, the stand is equipped with a drive with a rotational movement of the guide around its axis, and an elastic element is installed between the rod and the passive grip.