Apparatus for real time observation and recording of fretting wear

Abstract

The invention provides an apparatus for real time observation and recording of fretting wear. According to the invention, a screw thread in a top board of a frame of the apparatus is fixed in a thread connection hole in a plane sample clamp of a fretting testing stand; the upper end of a lens cone in the frame is in fixed connection with the top board, the lower end of the lens cone is connected with a magnifier, and the inner cavity of the lens cone is provided with a light source which emits light rays downwardly and is further provided with a camera which is electrically connected with a computer through a connecting wire; the bottom of a base plate of the frame is provided with a clamping slot used for clamping a plane sample, and the part of the base plate under the magnifier is provided with a through hole communicating with the clamping slot. The apparatus is applicable to any fretting operation mode and can be used for real time observation and recording of dynamic morphological characteristics of a transparent sample, and then accurate dynamic relationship between occurrence of damage and cycle numbers can be obtained through further analysis, thereby providing a more accurate test basis for designing, utilization and maintenance of a machine.

Description

Technical field [0001] The invention relates to a device for real-time observation and recording of fretting friction and wear. Background technique [0002] Fretting refers to the relative movement of very small amplitude between contact surfaces under alternating loads such as mechanical vibration, fatigue load, electromagnetic vibration or thermal cycle (displacement amplitude is generally on the order of microns). These contact surfaces are usually nominal The upper part is static, that is, the micro-movement occurs in the "firm" mating mechanical parts. Under the condition of ball / plane contact, micro-motion can be divided into four basic operating modes: tangential micro-motion, radial micro-motion, steering micro-motion, twist micro-motion. [0003] At present, based on friction experiments, our analysis methods are as follows: On the one hand, only after a certain period of experiment is completed, the sample can be taken out to observe its morphological characteristics; o...

AI Technical Summary

Problems solved by technology

However, it is impossible to know the small dynamic real-time changes of the sample during the experiment, so it is impossible to clearly know the exact dynamic relationship between the occurrence of damage and the number of cycles during the fretting process under different working conditions, such as: damage caused by furrow The exact number of cycles experienced by such transformation into peeling; thus, it is impossible to provide a more accurate test basis for mechanical design and maintenance

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