Resonant system capable of realizing multiaxial ultrasonic fatigue test

A technology of fatigue test and resonance system, which is applied in the direction of applying repeated force/pulsation force to test the strength of materials, etc., to achieve the effect of saving test cost, easy operation and improving efficiency

Pending Publication Date: 2019-05-17
JILIN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The invention provides a resonance system capable of realizing multi-axis ultrasonic fatigue test to solve the deficiencies in the existing ultrasonic vibration technology. By utilizing the principle of resonance, the ultrasonic loading device realizes ultra-high cycle multi-axis on the test piece at a frequency of 20KHz Load fatigue test, so that a set of ultrasonic vibration system can carry out axial and torsional ultrasonic fatigue tests through the conversion device

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  • Resonant system capable of realizing multiaxial ultrasonic fatigue test
  • Resonant system capable of realizing multiaxial ultrasonic fatigue test
  • Resonant system capable of realizing multiaxial ultrasonic fatigue test

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Embodiment Construction

[0023] It includes a transducer 1, a horn 2, an axial vibration conversion device 3 or a torsional vibration conversion device 4, the upper end of the transducer 1 is connected to the ultrasonic generator, the lower end of the transducer 1 is screwed to the horn 2, and the transformer The lower end of the rod 2 is connected with the axial vibration conversion device 3 or the torsional vibration conversion device 4, so as to realize the multi-axis ultrasonic fatigue test.

[0024] The axial vibration conversion device 3 includes an upper gripper 301 and a lower gripper 302 , and the upper gripper 301 and the lower gripper 302 are connected by a cylindrical test piece 5 .

[0025] The upper clamper 301 and the lower clamper 302 are symmetrical.

[0026] The torsional vibration conversion device 4 includes a metal rotating body 401 and four bolts 402. The metal rotating body has an internal thread at the front end and a spiral groove 403 at the upper end, which can convert axial ...

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Abstract

The invention relates to a resonant system capable of realizing a multiaxial ultrasonic fatigue test, and belongs to the technical field of the material fatigue test. The system comprises an energy converter, an amplitude-change pole, an axial vibration conversion device or a torsional vibration conversion device; a lower end of the energy converter is in threaded connection with the amplitude-change pole, and the lower end of the amplitude-change pole is connected with the axial vibration conversion device or the torsional vibration conversion device. The system disclosed by the invention hasthe advantages that a resonance system with the resonance frequency of 20KHz is composed through two conversion devices and the same set of ultrasonic generator, the energy converter and the amplitude-change pole, the axial vibration and the torsional vibration can be acquired through different conversion devices, the resonant system is convenient and fast, and the test equipment cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of material fatigue tests, and mainly relates to axial and torsional vibration fatigue tests in ultrasonic fatigue tests. Background technique [0002] The ultrasonic fatigue test technology uses the ultrasonic generator to convert the electrical signal into an ultrasonic signal. The transducer converts the high-frequency electrical signal into a mechanical vibration signal of the same frequency, and the displacement is amplified through the horn. At this time, the axial vibration is obtained. The axial vibration is converted into torsional vibration by the torsion measurement conversion device, thereby realizing high-frequency loading on the torsion test piece. [0003] The important mechanical parts in motor vehicles and aerospace will withstand long-term high-frequency cyclic loads during their service life, and their load cycles will reach 10 9 The above belongs to the category of ultra-high cycle fatig...

Claims

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Application Information

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IPC IPC(8): G01N3/32
Inventor 王昕李群王健曹晓东
Owner JILIN UNIV
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