Micro-movement friction and abrasion testing machine

Abstract

The invention discloses a micro-movement friction and abrasion testing machine. The micro-movement friction and abrasion testing machine is that two symmetrically arranged electric vibration exciters are adopted and used as excitation sources for generating micro-movement friction between friction pairs; a loading device is adopted and used for applying positive pressure to the friction pairs; a force sensor is adopted and used for collecting a positive pressure signal; a computer data processing device is arranged and produces a closed-loop feedback control together with the acquired positive pressure signal, and the load applied by the loading device is kept constant. In addition, the computer data processing device is used for recording and analyzing the positive pressure signal acquired by the sensor, a micro-movement friction force signal, and a displacement signal, acquired by a displacement sensor, of each electric vibration exciter and then are automatically outputting the signals to generate abrasion performances for a sample A and a sample B of the friction pairs; and therefore, the micro-movement friction and abrasion testing machine has the characteristics of being adjustable in vibration excitation amplitude, variable in vibration mode, convenient to operate and move, high in loading precision, and reproducible in project service condition, the experimental data is high in repeatability and can be used for evaluating the micro-movement friction and abrasion performance of a material.

Description

technical field [0001] The invention relates to an electric excitation type fretting friction and wear testing machine, in particular to the technical field of fretting friction and wear testing of materials. Background technique [0002] Fretting friction occurs when there is motion between two contacting surfaces with very small amplitudes. Fretting friction can not only lead to the friction and wear between the contact surfaces, but also accelerate the generation and expansion of cracks, and finally greatly reduce the fatigue life of components. At present, damage caused by fretting friction is quite common in the industrial field. Therefore, in-depth research on fretting tribology has important guiding significance for the prevention and control of industrial fretting damage, and has broad engineering application prospects. In the field of fretting friction and wear research, there are many research objects, so there are many fretting friction and wear test equipment i...

AI Technical Summary

Problems solved by technology

A high-frequency fretting wear testing device disclosed in Chinese patent CN102435518A is an electric fretting friction and wear testing machine, which uses an electric vibrating table to provide the slight vibration required for testing fretting wear. The volume is small, and it is suitable for situations where the amplitude is not high and the excitation force is small; a small displacement reciprocating rolling friction and wear testing machine disclosed in Chinese patent CN201689023U is an improvement on the basis of a hydraulic friction and wear testing machine. The fretting friction and wear testing machine has moderate amplitude or exciting force and frequency, high precision and easy control, but the hydraulic system is prone to oil leakage, the equipment is large in size and inconvenient to maintain

Although the performance of this testing machine is relatively superior, the data processing method is fixed and cannot be optimized according to specific situations, and the price is very expensive, which limits its wide application

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