Piezoelectric driving type low-temperature in-situ high-frequency reciprocating fretting friction and wear test platform

Abstract

The invention relates to a piezoelectric driving type low-temperature in-situ high-frequency reciprocating fretting friction and wear test platform and belongs to the field of precision in-situ testing. A test pressure loading unit is powered by a precision servo motor. A two-stage worm gear reduction mechanism is cooperated with a screw nut pair so as to perform precise pressure loading. A high-frequency reciprocating unit is arranged on the lower side, an advanced piezoelectric ceramic drive technology is adopted, and an independently designed flexible hinge is cooperated to output high-frequency fretting displacement; a low-temperature precision clamping unit is accurately clamped by upper and lower fixtures and is low-temperature loaded by a liquid nitrogen pipe in the lower fixture; adata acquisition unit comprises a tension sensor, a pressure sensor, and a dual-colorimetric infrared thermometer. The piezoelectric driving type low-temperature in-situ high-frequency reciprocatingfretting friction and wear test platform in the invention has the advantages of reliable principle, compact size, compact structure and high frequency, and has good compatibility with a microscopic imaging system with an open space structure such as a mainstream optical microscope, a Raman spectrometer and an X-ray diffractometer.

Description

Technical field [0001] The invention relates to the field of precision in-situ testing, in particular to the field of fretting friction and wear test design, in particular to a piezoelectric drive type low-temperature in-situ high-frequency reciprocating fretting friction and wear test platform. It is used for in-situ test of specimens in the process of high frequency reciprocating fretting friction and wear in low temperature environment. It can monitor the friction and wear behavior of specific materials in this process, and provide testing for revealing the friction characteristics and damage methods at the micro scale. method. Background technique [0002] As the support and forerunner of all high and new technologies, materials are of vital significance to the development of science, improving the testing level of various properties of materials, especially the testing ability of the microscopic deformation damage mechanism and performance evolution law of materials under se...

AI Technical Summary

Problems solved by technology

The traditional friction and wear test technology is relatively mature, but the analysis of the wear zone is based on off-line testing methods, which cannot dynamically monitor the microstructure of the specimen during the friction test.

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