Steel wire fretting fatigue testing machine and method

A technology of fretting fatigue and testing machine, which is applied in the field of testing machine to achieve the effect of simple structure, easy computer control and measurement, and large driving force

Inactive Publication Date: 2009-12-09
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the above-mentioned testing machines, the fretting friction testing machine and the fatigue testing machine of the sample are all single-type testing machines, and the axial fatigue test method and device of...

Method used

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  • Steel wire fretting fatigue testing machine and method
  • Steel wire fretting fatigue testing machine and method

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Embodiment Construction

[0019] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0020] The steel wire fretting fatigue testing machine of the present invention is mainly composed of a support stand, a horizontal loading device and a fatigue testing device. Support platform is made up of fixed nut 1, upper bearing beam 2, support column 3 and support platform 8, and support column 3 is fixed on the support platform 8, and upper load beam 2 is supported by support column 3, is connected by fixed nut 1. The loading device includes wedge-shaped sliders 21 symmetrically placed on both sides of the axial steel wire. The end face of the wedge-shaped slider 21 is milled with a semicircular groove, and a through hole is punched at the end of the groove. The loading steel wires 22 are respectively placed in the groove, and the The two through holes pass through and are fixed, and two wedge-shaped sliders 21 are respectively placed in guide suppo...

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Abstract

The invention relates to a steel wire fretting fatigue testing machine and a method. The testing machine mainly comprises a horizontal loading device, an axial clamping device and an axial tensile compression device, wherein the horizontal loading device consists of a concave horizontal support saddle, a guiding support saddle, a wedged slide block, a loading steel wire, a pressure sensor, a loading rod and a locking nut; the axial clamping device consists of a spoke-type tensile compression sensor, a threaded rod connected with the spoke-type tensile compression sensor and an upper holding block fixed on the threaded rod; and the axial tensile compression device consists of an oil cylinder, a threaded rod connected with the piston of the oil cylinder and a lower holding block fixed on the threaded rod. The steel wire fretting fatigue testing machine has the advantages that by exerting horizontal set load on an axial steel wire through the horizontal loading device and by acting axial fatigue stress on a steel wire sample through the axial clamping device and the axial tensile compression device, the testing machine realizes fretting fatigue test of the coaction of fretting wear and axial fatigue stress of the steel wire sample; dynamic adjustment of the concave horizontal support saddle ensures that an axial fatigue steel wire does not generate bending stress; moreover, fluctuation ranges of both amplitude and frequency are wide and easy to control and measure by utilizing computer program.

Description

technical field [0001] The invention relates to a testing machine and method, in particular to a steel wire fretting fatigue testing machine and method for studying the steel wire fretting fatigue state. Background technique [0002] Steel wire rope has good bending flexibility and load-bearing capacity, so it is widely used as traction cable for transportation machinery, hoisting cable for mining machinery, support cable for passenger cableway, load-bearing steel cable for cable-stayed bridge, etc. The bearing strength and service life of steel wire rope Longevity is very important to the safe operation of these application equipment. During the operation of these equipment, the steel wire rope is subject to repeated stretching and bending and dynamic loads, so that the internal strands of the steel wire rope and between the steel wires are subject to fretting wear of different fretting amplitudes, and they must also withstand alternating vibrations. stress. Smaller frett...

Claims

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Application Information

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IPC IPC(8): G01N3/10
Inventor 张德坤王大刚王崧全
Owner CHINA UNIV OF MINING & TECH
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