End surface contact type upper specimen clamp capable of automatically leveling

Abstract

The invention discloses an end surface contact type upper specimen clamp capable of automatically leveling and belongs to a specimen clamp for a friction wear test machine. The end surface contact type upper specimen clamp comprises a base body, wherein the base body is fixed on a bottom plate, and the base body is further movably connected with a base body press plate; a concentric concave ring spherical surface is jointly formed by the base body and the inner side of the base body press plate, a leveling ball socket and a leveling ball are arranged on the bottom plate, the sizes of the leveling ball and the leveling ball socket are matched, and the leveling ball is arranged in the leveling ball socket. The upper specimen clamp further comprises a clamp body and a clamp press plate, wherein a concentric ring spherical surface matched with the concentric concave ring spherical surface is formed by the clamp body and the outer side of the clamp press plate together, and coaxial semi-cylindrical concave surfaces matched with specimens are arranged on both the clamp body and the inner side of the clamp press plate. The clamp body and the clamp press plate can ensure fixing stability after the specimens are clamped and can ensure that the test surfaces of the upper and lower specimens are in complete and uniform contact, so that an angle between the upper specimen and lower specimen disappears, and the accuracy of friction wear test data is effectively improved.

Description

[0001] technical field [0002] The invention relates to a sample fixture used in a friction and wear testing machine, more specifically, the invention mainly relates to a self-levelling end surface contact type upper sample fixture. [0003] Background technique [0004] Due to the relative movement, the mechanical parts in contact with each other cause damage to the parts due to friction. Fretting wear is a damage mode that occurs in mechanical parts with extremely small amplitude motion, and is the most common and common damage form in engineering. Studying the friction and wear properties of materials by simulating the actual working environment is an effective means to improve the life of mechanical parts. The friction and wear testing machine is a scientific instrument used to study the friction and wear and lubrication properties between the contact surfaces of materials. The clamping and fixing of experimental samples is an important link to truly reflect the frict...

AI Technical Summary

Problems solved by technology

[0007] One of the objectives of the present invention is to address the above-mentioned deficiencies, to provide a self-leveling end-face contact type upper sample clamp, in order to solve the problem that the end-face contact type clamp in the prior art cannot stably clamp the upper sample in the friction and wear test , and the upper and lower samples cannot be in uniform contact with eccentric loads, resulting in technical problems such as deviations in friction and wear test data

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