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Test method and test device for torsional composite fretting friction wear

A test method and test device technology, applied in the direction of testing wear resistance, can solve problems such as affecting safe production and shortening the service life of parts and components

Inactive Publication Date: 2011-02-02
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fatigue and wear caused by torsional compound fretting greatly shorten the service life of parts, directly affect safe production, and also bring huge economic losses

Method used

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  • Test method and test device for torsional composite fretting friction wear
  • Test method and test device for torsional composite fretting friction wear
  • Test method and test device for torsional composite fretting friction wear

Examples

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Embodiment Construction

[0043] A specific embodiment of the present invention is: a test method for torsional compound fretting friction and wear, the practice is:

[0044] a. Clamp the upper test piece 6 of the plane on the upper fixture 5, and the upper fixture 5 is fixed on the six-dimensional force / moment sensor 4, and the spherical lower test piece 14 is clamped by the lower fixture 16, and the lower fixture 16 is fixed on the inclined On the mounting plate 12 on the output shaft of the high-precision ultra-low-speed rotary motor 13, the center of the spherical lower test piece 14 is located on the axis of the rotary motor 13 output shaft;

[0045] b. Control the up and down, left and right movement of the upper fixture 5 and the upper test piece 6 held by the data acquisition control system, so that the upper and lower test pieces 6, 14 are in contact and the upper and lower test pieces 6, 14 are kept set At the same time, the data acquisition and control system controls the rotary motor 13 and...

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Abstract

The invention discloses a test method and a test device for torsional composite fretting friction wear. The method comprises the following steps that: a, an upper test piece is clamped on an upper fixture connected with a six-axis force / moment sensor, and a lower test piece is clamped by a lower fixture, wherein the lower fixture is fixed on an inclined rotary motor (13) shaft; b, a data acquisition control system controls the upper fixture and the upper test piece to move up and down and move left and right to make the upper fixture and the upper test piece contact and keep a set normal load Fn, and the data acquisition control system controls a rotary motor and the lower test piece to rotate in set parameters; and c, the six-axis force / moment sensor measures a tangential force, namely a frictional force Ft, the frictional force Ft is sent to the data acquisition control system, and the curve of the frictional force Ft and a rotary angle displacement amplitude theta is obtained through analysis to represent dynamic characteristics of torsional composite fretting. By the method, composite fretting damage of a component in complex stress is more really simulated; the precision of control and test is high; the repeatability of experimental data is good; and the automation degree is high.

Description

technical field [0001] The invention relates to a test method for fretting friction and wear and a test device thereof. Background technique [0002] Fretting (Fretting) refers to the relative motion with extremely small amplitude (displacement amplitude is generally in the order of microns) that occurs between nominally static contact surfaces under alternating loads such as mechanical vibration, fatigue load, electromagnetic vibration, or thermal cycle. , that is, fretting occurs in mechanical parts that are "tightly" fitted. Fretting is ubiquitous in tight-fit parts in the fields of machinery industry, nuclear reactors, aerospace, bridge engineering, automobiles, railways, ships, power industry, weapon systems, telecommunications equipment and artificial implanted organs. The fretting that exists in tight fitting parts can cause component seizure, loosening, power loss, noise increase or form a pollution source, or fatigue cracks can be generated and propagated, resultin...

Claims

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Application Information

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IPC IPC(8): G01N3/56
Inventor 朱旻昊沈明学莫继良蔡振兵彭金方周仲荣
Owner SOUTHWEST JIAOTONG UNIV
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