SU1385020A1 - Installation for investigating physicomechanical properties of materials - Google Patents

Description

(21) 4135492 / 25-28

(22) 10/20/86

(46) 03/30/88. BULL. № 12

(71) All-Union Scientific Research Institute of Mining Geomechanics and Surveying

(72) E.V.: Lodus

(53) 620.178.311 (088.8)

(56) USSR Author's Certificate No. 1157393, cl. G 01 N 3/08, 1985.

(54) INSTALLATION FOR INVESTIGATION OF PHYSICAL AND MECHANICAL PROPERTIES OF MATERIALS

(57) The invention relates to testing equipment, in particular, to installations for studying the physicomechanical properties of materials under cyclic loading. The purpose of the invention is to expand the types of applied loads by creating alternating deformations with different asymmetry coefficient, which is achieved by changing the angle of inclination of the guides 2 and 3 when synchronously rotating the sleeves 15 and 16 around the axes 13 and 14. In this case, the distance between the coaxial grippers 4 and 5 changes cyclically, which leads to cyclic loading 6. The sample-loading cycle parameters are set to position the grippers 4 and 5 on guides 2 and 3, for which the installation is provided with a drive moving the grippers 4 and 5 in the form of a screw pair, the screw 7 which is mounted paralleli

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but guide 2 and interacts with the rotational drive 8, and a grip 4 is fixed on the nut 9. The claws 21 are synchronized to rotate when the nut 9 moves;

The invention relates to a testing technique, in particular, to installations for studying the physicomechanical properties of materials under de-energizing of a cyclic load.

The aim of the invention is to expand the types of applied loads by creating alternating deformations with different asymmetry coefficients.

The drawing shows an installation diagram comprising a base .1 mounted on it, at an acute angle to each other, guides 2 and 3, two coaxial grippers 4 and 5 for sample 6, placed on guides 2 and 3, respectively, driving the grippers 4 and 5 , made in the form of a screw pair with a screw 7 connected to the rotational drive 8 and the nut 9. Measuring devices 10-12 are installed in series in the path of movement of the grippers. On the basis of T, axes 13 and 14 are installed at an angle to each other, equal to the angle of inclination of guides 2 and 3, with sleeves 15 and 16, each of which is installed with the possibility of synchronous rotation on the corresponding axis 13 and 14. On sleeve 15, radially 2 for gripping 4 and screw pair 7.9 for driving the grippers, and on sleeve 16 radially in a plane passing through the axis of the screw 7 and the axis of sleeve 15, a second guide 3 with gripper 5 is installed. Synchronous rotation of sleeves 15 and 16 is provided drive 8, installed on the platform 17 through gearbox 18, screws 7 and gear 19, fixedly mounted on axis 13, interacts with sleeve 15 and through pin 20 with sleeve 16. Coaxiality of grips 4 and 5 is provided by pins 21 fixed to nut 9 and passing through hole in sleeve 22

1385020

view of the sleeves 15 and 16 - gear 19, fixedly mounted on the axis 13, and the pin 20, fixed to the sleeve 15 and interacting with the sleeve 16.

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Measuring instruments 10-12 are arranged around the circumference around axis 13 on racks 23.

5 The installation works as follows.

The actuator 8 is turned on, and through the gearbox 18, the rotation of the 10 screws 7 around its axis is carried out. At the indicated rotation of the screw 7, the nut 9 moves along it and draws along itself through the pins 21 the sleeve 22 and the clamps 4 and 5 together with the sample 6.

 As a result of this movement, the grippers 4 and 5 are displaced relative to each other in the axial direction and produce axial deformation of the sample 6. When the specified axial direction is reached

The 20 deformations on sample 6 of gear 18 are switched to interaction with gear 19, which rotates platform 17 with sleeves 15 and 16 around axis 13. In this case, guides 2 and 3 synchronously rotate around axes 13 and 14, resulting in an angle between guides 2 and 3 cyclically changes for each revolution of the sleeves 15 and 16, which leads to cyclic movements of the grippers 4 and 5 and cyclic deformation of the sample 6. After performing a predetermined number of deformation cycles, using instruments 10-12, determine

35 physicomechanical characteristics of the material of sample 6 for various values of axial deformations, for which the platform 17 is rotated and sample 6 is alternately brought into the zone of action

40 of the next device. Then, the gearbox 18 is switched again to interaction with the screw 7 and, by changing the value of the axial deformation of the sample 6, its cyclic deformation is repeated by the proposed method for a different value of the axial initial deformation

25

313850204

Claims (1)

Claims of the invention include asymmetry, it is supplied axles, fastened ends and Ustaunek for the study of physico-innovation on the base at an angle mechanical properties of materials, one to another, equal to the angle of inclination containing a base, mounted guides, two sleeves, each on it at an acute angle to each other - of which two guides are installed with possibility, two coaxially synchronous rotations for a corresponding grip, each of which has an establishing axis, each of the direction of the corresponding guide, and Q others are fixed radially to a corresponding movement of the grippers on the sleeve, screw screw pair governor in the form of a screw pair, is t-connected with one of the bushings and is installed with the fact that it is fully fixed in parallel to the With the expansion of the types of the applied guide, and the gripping, the loading is established by creating alternating on this guide, fixed deformations with different coefficients on the nut.