SU1539582A1 - Centrifugal installation for impact tests of specimens - Google Patents

Abstract

The invention relates to facilities for testing material samples for strength and allows for expanding the functionality by providing tests not only constant but also with a variable ratio between inertial forces at the time of impact of the samples. Platform 1 is installed on frame 1 with a 3 rotation drive, a guide 16 for loads 4, 5, 6, with which grippers 7, 8, 9 for samples 10, 11, 12 are connected, with a stepped drum 13. Weights are connected by flexible rods 15 with the corresponding steps of the drum 13 in the direction of decreasing their diameter as the weights move away from the axis of the drum. The platform is accelerated by a drive 3, it disinfects the drum 13, under the action of centrifugal force, the weights are displaced, which leads to the impact of the samples. The ratio of inertial forces at the moment of impact sets the initial position of the weights and the choice of the diameter of the drum stages. 1 il.

Description

The invention relates to installations for testing samples of materials for strength and allows you to expand the functionality by providing tests not only

". with constant, but also with variable co2

the relationship between inertial forces at the moment of collision of the samples. A platform 2 is installed on the bed 1 with a drive 3 for its rotation, a guide 16 for loads 4,5,6, with which the grippers 7,8,9 for samples 10,11,12 are connected, with a step drum 13. The loads are connected by flexible rods 15 with the corresponding steps of the drum 13 in the direction of decreasing their diameter as the weights are removed from the axis of the drum. The platform ’is accelerated by drive 3, brake drum 13, under the action of centrifugal force the loads are displaced, which leads to the collision of the samples. The ratio of inertial forces at the moment of impact is set by the initial position of the weights and the choice of the diameter of the stages of the drum. 1 ill.

SC „„ 1539582

3

1539582

4

. The invention relates to installations for testing samples of materials and products for strength.

[The purpose of the invention is to expand the functionality of the installation by providing tests not only with a constant, but also with a variable ratio between inertial forces at the moment of collision of the samples.

The drawing shows a diagram of the proposed installation, General view.

The installation consists of a bed 1, platform 2 with a drive 3 of its rotation, placed on the platform of centrifugal loads 4-6, grippers 7-9 for samples 10 - 12, mounted on loads 4 - 6, and a drum 13 with a drive 14 of its rotation connected flexible rods 15 with loads 4-6 installed in the guide 16.

The drum 13 is made stepwise.

Weights 4-6 are placed in a row in the guide 16 with the possibility of movement along a common axis. Each load with ^{and is} united by a draft with a drum stage so that a load intended for Rotation but with a smaller radius is connected to a stage with a larger diameter.

The drum drive is made in the form of Fixed relative to the platform of the Stator, the rotor of which is the drum 13.

Installation works as follows.

Drive 3 is turned on and platform 2 is rotated together with guide 16 and weights 4-6. Upon reaching set—

Choosing the rotational speed on the drum drive 13, the braking moment is removed, which ensures that the loads are held in the initial position, as a result of which the loads 4-6 under the action of centrifugal forces move to the end of the guide 16. There is an impact interaction between samples 10-12 fixed on the loads . Turn on the drive 14 of the rotation of the drum 13 and through rods 15 return the goods to their original position and repeat the shock interaction between

Compiled by G. Savin Tehred M. Khodanich

10

fifteen

20

25

thirty

35

40

45

fifty

Editor A. Revin

samples. A series of shock interactions leads to the destruction of the samples. The fracture parameters and shock interaction diagrams are recorded. To change the intensity of the collision, the initial positions of the loads are changed before releasing the drum between the loads, or the diameters of the drum steps between the experiments are changed, which gives a different relative position of the loads in the initial position, or by selecting the rod lengths the initial relative positions of the loads between the experiments are changed.

The number of interacting samples is determined by the number of weights and drum stages. To hold loads, use a drum lock or create the necessary torque on the drive shaft. The drum by supplying a current of the appropriate magnitude to the drive coil.

Claims (1)

Claim Centrifugal installation for shock testing of samples containing a frame, a platform mounted on it with a drive for its rotation, centrifugal weights placed on the platform, specimen grippers attached to the respective goods, a drum with a drive for its rotation, associated with the loads by means of appropriate flexible rods and a guide in which one of the goods is placed, characterized in that, with the aim of extending the functionality by providing tests not only with constant, but also with a variable ratio between and irregular forces at the moment of impact of the samples, the drum is made stepped of cylinders of different diameters, the rest of the loads are installed in the guide coaxially with the first and connected to the corresponding steps of the bar, a ban in the direction of reducing their diameter as the weights move away from the drum axis, and the grips are coaxial with the weights .