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An ultrasonic fatigue average stress loading device

A technology of average stress and loading device, applied in the direction of measuring device, using sound wave/ultrasonic wave/infrasonic wave to analyze solids, using sound wave/ultrasonic wave/infrasonic wave to analyze materials, etc., to achieve low power consumption, shorten fatigue test time, and ensure resonance requirements Effect

Inactive Publication Date: 2020-06-26
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is: in order to solve the problem of the average stress loading in the ultrasonic fatigue test, a kind of ultrasonic fatigue average stress loading device is specially provided

Method used

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  • An ultrasonic fatigue average stress loading device
  • An ultrasonic fatigue average stress loading device
  • An ultrasonic fatigue average stress loading device

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Embodiment Construction

[0014] Such as figure 1 , figure 2 and image 3As shown, an ultrasonic fatigue average stress loading device of the present invention is composed of an ultrasonic generating assembly 01, a stress loading assembly 02, a power assembly 03, a linear transmission assembly 04, a bracket vertical plate 05, a sliding guide rod a06, a locking The nut 07, the positioning end plate 08, the sliding guide rod b09 and the test piece 10 are composed. The ultrasonic generating assembly 01 includes a piezoelectric transducer 011, a positioning seat 012 and a displacement amplifier 013. The stress loading assembly 02 includes a tension screw 021, a loading support Seat 022, loading slide plate 023, linear sliding sleeve a024, linear sliding sleeve b025, tray 026 and rubber pad 027, power assembly 03 includes servo motor 031 and reducer 032, linear transmission assembly 04 includes transmission key 041, spring collar 042, thrust bearing 043, ball screw 044, screw nut 045, sleeve 046, linear ...

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Abstract

The invention relates to an ultrasonic fatigue average stress loading device which is used in the field of ultrasonic fatigue tests and solves the problem of loading average stress in the ultrasonic fatigue tests. The ultrasonic fatigue average stress loading device is characterized in that an outer circle of a location seat in an ultrasonic generation assembly penetrates through a through hole atthe uppermost end of a support vertical plate, and the location seat and the support vertical plate are fastened by screws; a linear sliding sleeve a in a stress loading assembly is arranged on a smooth straight rod in the middle of a sliding guiding rod a in a sleeving mode, and a linear sliding sleeve b in the stress loading assembly is arranged on a smooth straight rod in the middle of a sliding guiding rod b in a sleeving mode; a flange structure at the right end of a speed reducer casing in a power assembly and the support vertical plate are fastened by screws, the left end of a ball screw is inserted into a flat key output hole of the speed reducer, and transmission can be achieved after connection. The ultrasonic fatigue average stress loading device disclosed by the invention canprovide + / -40kN axial tensile pressure load infliction for a test piece in the ultrasonic fatigue tests, can achieve 20kHz frequency fatigue tests, effectively shortens fatigue test time and can finish 1010 weekly fatigue tests in high efficiency.

Description

technical field [0001] The invention relates to an ultrasonic fatigue average stress loading device used in the field of ultrasonic fatigue test. Background technique [0002] Conventional fatigue tests can only complete 10 6 ~10 7 However, in many industrial sectors (such as high-speed trains, automobiles, aircraft, etc.), the actual service life of some structures and parts often needs to reach 10 cycles. 8 ~10 10 For example, a high-speed aero turbine engine operating at 3000r / min will experience 10 10 a stress cycle. Ultrasonic fatigue is an accelerated resonance fatigue test method, and its test frequency (20kHz) far exceeds the conventional fatigue test frequency (less than 200Hz). The essence of ultrasonic fatigue is to establish mechanical resonance waves on the loaded pattern. [0003] Ultrasonic fatigue test studies have shown that many engineering materials up to 10 10 Fatigue fracture will still occur after a cycle of stress cycles, so 10 7 Fatigue streng...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04G01N29/22
CPCG01N29/04G01N29/22
Inventor 张梁王弘
Owner SOUTHWEST PETROLEUM UNIV
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