SU1640599A1 - Test system for fatigue testing of samples of materials - Google Patents

Description

one

(21) 4675862/28

(22) P.04.89

(46) 04/07/91. Bul № 13

(71) All-Union Research Institute of Mining Geomechanics

and mine survey

(72) E.V. Lodus

(53) 620.178.4 (088.8)

(56) USSR author's certificate

R 1343292, cl. G 01 N 3/34, 1986.

(54) INSTALLATION FOR TESTING THE STEAM OF MATERIAL SAMPLES (57) The invention relates to a testing technique. The purpose of the invention is to expand the Functional Capability of the installation by testing rotating specimens for both bending and bending with torsion. The installation contains a rotation mechanism with a drive 6, made in the form of a slider wheel.

873 5 210 16412

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Sa 7 and gear gear 8, the mechanism of cyclic loading by bending in the form of an eccentric 9, kinematically connected with the drive 6, a helical gear 10 mounted on the gear wheel 7 coaxially with it, the helical gear gear 12 mounted on the base coaxially with spur gear 8, drive 1 axial movement of wheels 7 and 10, cantilever grips 3 and 4 of sample 5 mounted in spherical hinges on gears x 8 and 12, respectively, without the possibility of axial rotation relative to gears, and behind data from ex

I

This invention relates to a tester.

Noah technique.

The purpose of the invention is to expand the functional capabilities of the installation by testing rotating samples for both bending and bending with torsion.

The drawing shows a general view of the installation,

The installation includes a housing 1, central 2 and cantilever 3 and 4 grippers for sample 5, a rotation mechanism with a drive 6, made in the form of a gear wheel 7 and a gear gear 8, on which the gripper 3 is attached, a cyclic loading mechanism. a bend, made in the form of an eccentric 9, kinematically associated with the drive 6, the helical gear 10 fixed on the bezel of the wheel 7 coaxially with the subsequent, the drive 11 of the axial movement of the wheels 7 and 10 and the helical gear 12 interacting with the helical gear 10 and installed on the Considerations gear 8 coaxially g.

Kolrea 7 and 10 are installed in case 1 of axle with axial displacement, RESTIOR movement of wheels r1 1G Prona aditgch with gear P with two axes with 3 pin and 13 fingers, placed 8 frame I, and hinge 158 e & frame U e. the wheel Yu i y neeneedvayDDM rotation and axial displacement. its 7 and 10,

Kotit vSJttiWite chdkvaty 3 and 4 ustanu-U5ch, dshx gear 8 and 12 co-ersiptc fSPHUft in spherical hinges

centric H mechanism of cyclic loading by bending. For example, testing a rotating sample with a two-console bend includes a drive 6, a rotating gear 8 with a cantilever grip 3 in which sample 5 is fixed, and an eccentric 9 that loads the sample with a bend. In order to test a rotating sample in a double-console bending with torsion, in addition to drive 6, include drive 11, which moves gears 7 and 10 in the axial direction, which causes rotation of gear 12 relative to gear 8 and, therefore, twisting of the sample. 1 silt

five

five

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five

without the possibility of rotation relative to the axis of the gears. The prevention of the mutual rotation of the grippers 3 and 4 relative to the gears 8 and 12 is provided by a dipstick 16 mounted on the cantilever grips 3 and 4. The central gripper 2 is designed as a rod 17 with a spherical hinge 18 and is connected to the eccentric 9 of the cyclic loading mechanism by bending the spring 19 and centering core 20.

The installation works as follows.

For tests with a double-console bend, a rotating, torsion-free specimen includes a drive 6 and drives wheels 7 and 10 to rotate, transmitting to gears 8 and 12 with grips 3 and: 4 in which sample S is attached. Rotation from drive 6 is also transmitted to the eccentric 9, which loads the sample 5 with a bend.

For testing a rotating sample with a double-console bending with torsion, actuators 6 and 11 are actuated. Drive 11 axially rotates the wheels 7 and 10, At crankshafts 7 and 10

The rotation of the gear 12 and the gear 8 and the grip 4 relative to akhvag 3, which causes the sample to twist in an alternating or constant sign mode depending on the movement of the wheels 7 and 10 relative to the neutral position,

By setting the operating mode of the I1 drive, the nature of the application of a torsional load is changed. It may be, for example,

cyclically or stepwise variable- c.

Claims (1)

Invention Formula A device for fatigue testing of material samples, comprising a case, a central and two cantilever grippers for the sample, a rotary drive mechanism made in the form of a sprocket wheel and a gear gear, on which one of the claws is installed, and a cyclic loading mechanism for bending. as an eccentric, kinematically associated with the drive, characterized in that, in order to extend the functionality installation by testing rotations of samples for both bending and bending with torsion, the installation is equipped with a helical gear fixed to the pin of the gear wheel coaxially with the latter, the drive axial movement of the wheels n the spline gear, interacting with kosss-bym the wheel and the mounted one; the casing coaxially with the spur gear; the central grip is connected with the eccentric and the cantilever grips are coaxially mounted on the corresponding gear wheels by means of the respective spherical hinges and their rotation locks relative to the axis of the sixth six.