Test machine and test method for real-time and dynamic observation of end surface torsion friction and abrasion of friction interface

Abstract

The invention discloses a test machine and a test method for real-time and dynamic observation of end surface torsion friction and abrasion of a friction interface. The test machine comprises a pressure applying device, a rotary platform, a friction interface observing device and an adjusting device, wherein the pressure applying device comprises a lever, a lever bracket and weights, the rotary platform comprises a motor, a shaft encoder and a worm and gear transmission mechanism, the friction interface observing device comprises a high-speed camera, a torque sensor and a pressure sensor, and the adjusting device comprises a level and a vertical adjustable rod element. The axial loading is applied to a lower specimen by the lever and the weights, the rotary platform drives an upper specimen to do reciprocating torsion, the high-speed microscopic camera is used for observing the friction interface, the torsion friction and abrasion tests under different external loads are simulated by the adding and reducing of the weights, the change of the torsion frequency and the like, then the friction coefficient, the abrasion shape and the abrasion chip real-time movement in the friction process are obtained, and the friction and abrasion performances of transparent material in the whole process are evaluated. The test machine has the advantages that the structure is simple, the operation is convenient, and the repetitiveness is high.

Description

technical field [0001] The invention belongs to the technical field of end face torsion friction and wear testing machines, in particular to an end face torsion friction and wear testing machine and method for real-time dynamic observation of friction interfaces. Background technique [0002] End face torsional friction refers to the relative motion of the contact interface of the contact pair reciprocating around the load direction under a certain load. 30°), reciprocating rotating parts widely exist in transportation, such as polymer planar sliding slewing bearings in construction machinery, steering slewing discs of automobile trailers and center discs of train bogies, etc. End face torsional friction is different from fretting wear in that the wear area is large and serious, and the wear mechanism is more complex. The main types of testing machines used in the laboratory to study sliding friction are ring-block type, pin-disk type, fretting wear type, etc. [0003] Con...

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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a real-time dynamic observation of the friction interface end face twist friction and wear testing machine and method, aiming to solve the in-situ measurement of wear used by a small number of testing machines, but it destroys the continuity of the friction process and cannot be real-time. Dynamically observe the micro-wear state that occurs

The micro-movement real-time observation testing machine based on the small contact area, due to the small observable interface area and inflexible observable space, and the real-time movement of the wear debris between the end-face contact interfaces cannot be observed, the end-face torsion test for large-area contact There are certain limitations

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