Rotary micromotion friction wear test method and device thereof

Abstract

The invention relates to a rotary inching friction abrasion test method and a relative device, wherein the method comprises clamping a plane upper sample on an upper clamp, fixing a lower clamp on the horizontal rotation shaft of a high-precision ultra-low speed rotation motor, clamping a spherical lower sample via a lower clamp, aligning the horizontal central line of the lower sample with the rotation shaft of the rotation motor, using a data acquisition and control system to control the up-and-down and left-and-right motions of the upper clamp to contact the upper and lower samples and apply a preset normal load, at the same time, using the data acquisition and control system to control the rotation motor to reciprocally rotate the lower clamp and lower sample at preset rotation argument, rotation speed and times, to realize the rotary inching friction between the upper and lower samples, using a six-dimension force / torque sensor to test and feed the friction force to the data acquisition and control system to be analyzed to obtain a friction force-angle displacement curvature. The inventive method can simply realize small angle rotary inching friction abrasion of material, with high automatic degree, high control and test accuracy and better test data reappearance.

Description

technical field [0001] The invention belongs to the technical research field of tribology of mechanical engineering, in particular to a fretting friction and wear test method and a test device thereof. Background technique [0002] Fretting (Fretting) refers to the relative motion with extremely small amplitude between contact surfaces under the action of alternating loads such as mechanical vibration, fatigue load, electromagnetic vibration or thermal cycle. These contact surfaces are usually static in name, that is, fretting occurs In mechanical parts that are "tightly" fitted. Fretting tribology is a branch of disciplines that studies the mechanism of fretting, damage, testing, monitoring, and prevention. Electrical Engineering etc. Fretting is a friction method with a small relative motion range, and the material damage caused by it is usually manifested in two forms, namely: (1) Wear caused by fretting: fretting can cause surface wear between contact surfaces, resulti...

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Problems solved by technology

(2) Fatigue caused by fretting: fretting can accelerate the initiation and expansion of cracks, greatly reducing the fatigue life of components, and the fretting fatigue limit can even be lower than 1 / 3 of the ordinary fatigue limit

Rotational fretting friction has brought great losses and troubles to industrial production and life

Due to the difficulty in reproducing or simulating the manual control, the research work on the rotation micro-movement has been seldom carried out.

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