SU84060A1 - Fatigue Testing Machine - Google Patents

Description

There are known fatigue testing machines for samples of various metals, metallic metals and other materials when they are stretched and compressed.

The disadvantage of these machines is that they are useful for testing samples of limited length and can develop no more aapaiiee of preset values.

This disadvantage is eliminated in the proposed machine, which is made in the form of two centrifugal exciters — Ghiller — Schumann oscillations. The distance between pathogens can be varied depending on the length of the specimen attached to them; The excitations of the body are equipped with each individual drive and tensioning device.

FIG. 1 and 2 shows a car in two locations; in fig. 3, 4 and shows the location of the disks of centrifugal exciters iodine different angles.

The machine has two centrifugal excitations / oscillations, in which removable grippers 2 of which test sample 3 is fixed.

The eccentric disks of each exciter are fixed on the shafts in such a way that when rotating in different directions, the vertical components of the centrifugal forces are extinguished, and the horizontal ones are folded, affecting the test sample and not transferring to the foundation of the machine.

Each exciter is equipped with a tensioning device, consisting of sh1 m HJ rack 4, through which the bar 5 is passed. At the cut m end of the bar, the steering wheel 6 with the tension nut is located. Vrashenny steering wheels in the test specimen by compressing at this m. The girders 7 creates pre-tension. Kan-sdy pathogen is also equipped with a spring shock absorber 8.

The exciters are located together with the tensioning devices on the supporting detachable frame I consisting of two nuts fastened together with an 84060-2 T; -iM f. Such a Device of the reference frame of the bunker is the possibility of a rsgptypor.at :, which is used when testing samples of different lengths, and also to use each nontrobial pathogen separately.

Spabzhep pathogens with individual electric motors 10 (cbg. 2). B, for the purpose of operation of the pathogens, their drives are connected by an upholstery with a synchronizing shaft (//, which is above the GI), is driven from the electric motors through gearboxes 12.

Change in the number of turns of pathogens shafts 1o, eabzheinymi koi us wagon) 1m and Sharpirami.

Device | wake up / 1st provides for the presence of three discs in each of the nn. the sum of the masses of the outermost disks is equal to the mass state of the disk. Kpaihuie disks 16 zairgsovamy (Fig. 3) on the exciter shaft, and the middle disk / 7 fit freely can be updated 1 st I fixed (n 10 respect: use P y to the note, and what does change the overall eccentricity of the system (/ ) three

and POSSIBILITY of OST 5 Poluch ia s razl1 chiikh Oleba1 I VOLPCHTSAUPhSL

tse -1trobezhnoy sil.

On . 3 1С1ггрт the gesture of the first three dyekov are found on the one-side of the C, with a maximum of 5 max a maximum of 1 G of the eccentricity. On . 4 medium H i; i dis is rotated from 1 to 1 to the angle “/, 90 °, with

this exciter C 1tet with Stem / a -2cos, -.

In Fig. 5, the middle disk of the new | K t for li by the angle and ex e trisptet C system, i.e. the pathogen 1c creates disturbances. centrifugal.

Fixed IOLOZHE disks and RSGUL ruy about 10TOV

elkktrodv gatel, to receive the required amplitudes from the meter; creating a redwarder) Atom 1e in the form of secondary devices, it is also possible to get asymmetric shkly.

In addition, changing the shaft speed of pathogens using a K transmission mechanism, it is possible to carry out a test of the oscillation frequency of the shock wave.

After the launch of the maigny, it is carried out with a sample of a specimen, monitored with a specimen gauge.

A centrifugal excitation of a null count is applied in the coreline (it allows a multiple of increasing the maximum amplitude of oscillations. For example, the extra magnitude of the exciter on the frame of the exciter, Honapi of the exciters between itself).

Each pathogen is self-contained in Bratsonon 1u Maiiiiou, which can be used for various testuni1. in a horizontally established position, the pathogen gives the zodalnuyu vozmun1a ot.U10 force; It is placed on the wall of the body; it gives the vertical 0 set at an angle — the lines of a disturbing osh, y10 force.

The subject invention {1

1. A machine for testing materials for fatigue, centrifugal exciters and springs with tensioning devices for carrying out a static load, so that, in order to ensure the possibility of testing samples of different lengths under deformations compression, it is made of two centrifugal pathogens, the distance between which can be set depending on the length of the sample fixed between them,

2. Machine for and. 1, so that, in order to be able to use each individual driver as an independent unit for testing, each of them is equipped with an individual drive II with a tensioning device,

3. Form of machine performance but np. 1 and 2, characterized in that, in order to obtain different amplitudes of disturbing forces, each exciter shaft is equipped with unbalanced loads made in the form of three disks, with adjustable eccentricity, and the extreme discs, whose masses are equal to the mass of the middle disc, are fixed by HJ shaft exciter and the middle disk can be set at different angles to the outermost disks for the required eccentricity.

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Fig 5