Tension-torsion combined fatigue testing device

Abstract

A tension-torsion combined fatigue testing device comprises a sleeve, lugs, a guiding column, a screw rotating shaft, a lower supporting plate, a lower supporting assembly, a torque sensor and baffles. The upper end of the sleeve is connected with an upper clamping head through a fixing screw, and the lower end of the sleeve is connected with the screw rotating shaft. The lower end of the screw rotating shaft is connected with the lower supporting assembly through screws. The lower supporting plate is connected with the lower supporting assembly by a fastening member. A first baffle is installed below the lower supporting plate, and both sides of the lower end of the lower supporting assembly are provided with second baffles. The torque sensors are respectively mounted longitudinally and between the lower supporting assembly and a lower connector through the screws, and are connected with the lower supporting assembly through fastening nuts. The guiding column is arranged between the lugs of the sleeve and the lower supporting plate, and the guiding column can move up and down. The tension-torsion combined fatigue testing device can ensure that: torsion actions can be realized simultaneously with tension processes of the device, and the device has the advantages of simple structure, and easy operation and control.

Description

technical field [0001] The invention relates to a fatigue testing machine, in particular to a pull-torsion compound fatigue testing device. Background technique [0002] At present, most of the fatigue tests are done on the uniaxial fatigue testing machine. The uniaxial fatigue testing machine has a simple structure, low price, and a strong theoretical background of uniaxial fatigue strength, which is of great help to the completion of the fatigue test under certain conditions. . However, most mechanical parts are often in a complex stress-strain state in actual work, and the uniaxial fatigue test only makes the specimen in a unidirectional tension and compression state. Therefore, it is extremely urgent to study the multiaxial fatigue test. [0003] The most common multiaxial fatigue test is the pull-torsion composite fatigue test, which is carried out on a pull-torsion composite fatigue testing machine, which has two independent actuators for tension and torsion to reali...

AI Technical Summary

Problems solved by technology

At present, the tension-torsion composite fatigue testing machine includes MTS809-250kN, tension-torsion electro-hydraulic servo material testing machine, Instron tension-torsion biaxial floor type electronic universal material testing machine, ZSLD series electro-hydraulic servo tension-torsion compound testing machine of Changchun Testing Machine Research Institute. Fatigue testing machine, Xi'an Lichuang electro-hydraulic servo tension and torsion fatigue testing machine, etc., but the price is expensive, and the price is 1.5 times that of the uniaxial fatigue testing machine

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