Impacting-sliding composite frictional wear testing device and method thereof

Abstract

The invention discloses an impacting-sliding composite frictional wear testing device and a method thereof. The method comprises the following steps that a spherical upper test piece is clamped on an upper clamp and a planar lower test piece is clamped by using a lower clamp; the lower clamp is controlled to move up and down by a precise screw lifting platform so that the upper test piece and the lower test piece come into contact; a servo motor drives the upper test piece to do up-down reciprocating motion at set frequency f, times N and displacement S by an eccentric disc, an upper knuckle bearing, a lower knuckle bearing, an impacting shaft, a spring leaf and an upper clamp, and carries out reciprocating impact on the lower test piece; in the impacting process, the spring leaf is deformed under the action of stress, so that impacting-sliding composite frictional wear between the upper test piece and the lower test piece is realized; and simultaneously, the force borne by the lower test piece is tested by a three-dimensional dynamic piezoelectric sensor connected with the lower clamp and is transmitted to a data acquisition control system, and a friction coefficient-cycle time curve is obtained by analysis. The impacting-sliding composite frictional wear testing device and the method disclosed by the invention have the advantages that the material can conveniently generate rigidity-adjustable impacting-sliding composite frictional wear, the automation degree is high and the repeatability of experimental data is good.

Description

technical field [0001] The invention belongs to the technical field of tribology of mechanical engineering, and in particular relates to a sliding compound friction and wear test device and a method thereof. Background technique [0002] The failure of mechanical parts mainly includes three forms of wear, fracture and corrosion, and according to statistics, the failure of wear is as high as 60% to 80%. Wear is the process of continuous loss of surface materials, residual deformation or other damage of objects in contact with each other during relative motion, which is the inevitable result of friction. Wear and tear will lead to changes in the size of parts, loss of precision, shortened life, and increased vibration, noise, and lubrication of the mechanical system, greatly reducing the reliability of the system, and even serious accidents. [0003] In actual application conditions, the relative motion between the friction pairs is very complicated, and the resulting wear is...

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.

Images