A kind of sliding compound friction and wear test device and its method

Abstract

A punch-slip compound friction and wear test device and its method are as follows: the spherical upper test piece is clamped on the upper fixture, and the plane lower test piece is clamped by the lower fixture; , the lower test piece is in contact; the servo motor drives the upper test piece to reciprocate up and down with the set frequency f, number of times N and displacement S through the eccentric disc, the upper joint bearing, the lower joint bearing, the impact shaft, the spring leaf, and the upper fixture. And perform reciprocating impact on the lower test piece; during the impact process, the spring leaf is deformed under force, thereby realizing the combined friction and wear of sliding between the upper and lower test pieces; at the same time, the three-dimensional dynamic piezoelectric sensor connected to the lower fixture measures The force borne by the lower test piece is sent to the data acquisition and control system, and the friction coefficient-cycle number curve is obtained through analysis. The test device and the method thereof can conveniently cause the material to undergo combined friction and wear with adjustable stiffness, and have a high degree of automation and good reproducibility of experimental data.

Description

Technical field [0001] The invention belongs to the technical field of tribology of mechanical engineering, and particularly relates to an impact-slip composite friction and wear test device and a method thereof. Background technique [0002] The failure of mechanical parts mainly has three forms: wear, fracture and corrosion, and according to statistics, wear failure is as high as 60% to 80%. Abrasion is the process of continuous loss of surface material, residual deformation or other damage caused by the relative movement of objects in contact with each other. It is an inevitable result of friction. Abrasion can cause changes in the size of parts, loss of accuracy, shortened life, and aggravate the vibration, noise, pollution and lubrication of the mechanical system, greatly reduce the reliability of the system, and even cause serious accidents. [0003] In practical application conditions, the relative movement between the friction pairs is very complicated, and the resulting w...

AI Technical Summary

Problems solved by technology

Due to the difficulty of manual control reproduction or simulation of impact-slip composite friction and wear, scholars at home and abroad have mainly focused on single impact wear and sliding wear, and the research work on impact-slip composite friction and wear has been seldom carried out.

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