Twisting or micro-moving frictional wear test device

Abstract

The invention relates to a torsional fretting friction wear test method, the method is that: an upper testing part is clamped in an upper clamp, a lower clamp is fixed with a high-precision low-speed rotation table by a thread, a vertical central line of a holding cavity of the lower clamp is aligned with a rotating shaft of the high-precision low-speed rotation table, a spherical lower testing part is clamped by the lower clamp; the upper clamp is controlled for up and down movements by a data collection control system, the upper and lower testing parts are contacted and are exerted by a setload, at the same time, the lower clamp and the lower testing part clamped by the lower clamp are controlled by the data collection control system to carry out a plurality of times of reciprocating rotations by a set rotation speed and a rotation angle; at the same time, the friction torque is measured by a six-dimension force / torque sensor which is connected with the upper clamp and is sent to the data collection control system, and a torque-angular displacement curve under the set rotation speed and the load conditions can be obtained by analysis. The method can conveniently allow the materials to generate the small angle torsional fretting friction wear, the degree of the automation is high, the precision of the control and the test is high and the reproducibility of the test data is good.

Description

technical field

[0001] The invention belongs to the field of friction technology research, in particular to a fretting friction test method and a test device thereof. Background technique

[0002] Fretting (Fretting) refers to the relative motion with extremely small amplitude between contact surfaces under the action of alternating loads such as mechanical vibration, fatigue load, electromagnetic vibration or thermal cycle. These contact surfaces are usually static in name, that is, fretting occurs In mechanical parts that are "tightly" fitted. Fretting tribology is a branch of disciplines that studies the mechanism of fretting, damage, testing, monitoring, and prevention. Electrical Engineering etc. Fretting is a friction method with a small relative motion range, and the material damage caused by it is usually manifested in two forms, namely: (1) Wear caused by fretting: fretting can cause surface wear between contact surfaces, resulting in material damage. Losses and ...

Examples

Embodiment

[0045] A kind of specific embodiment of the present invention is, a kind of torsion fretting friction and wear test method, and its practice is:

[0046] a. Clamp the upper specimen on the upper fixture, and then fix the lower fixture and the high-precision low-speed turntable through threads, and the vertical centerline of the clamping cavity of the lower fixture is aligned with the rotation axis of the high-precision low-speed turntable, Clamp the spherical lower test piece with the lower clamp;

[0047] b. Control the up and down movement of the upper fixture through the data acquisition control system, so that the upper and lower specimens are in contact with and apply the set load P, and at the same time, through the control of the data acquisition control system, the lower fixture and the lower specimen held by it are controlled by the data acquisition control system. The reciprocating rotation of the set speed ω, rotation angle θ and reciprocating times N realizes the t...

technical field

[0001] The invention belongs to the field of friction technology research, in particular to a fretting friction test method and a test device thereof. Background technique

[0002] Fretting (Fretting) refers to the relative motion with extremely small amplitude between contact surfaces under the action of alternating loads such as mechanical vibration, fatigue load, electromagnetic vibration or thermal cycle. These contact surfaces are usually static in name, that is, fretting occurs In mechanical parts that are "tightly" fitted. Fretting tribology is a branch of disciplines that studies the mechanism of fretting, damage, testing, monitoring, and prevention. Electrical Engineering etc. Fretting is a friction method with a small relative motion range, and the material damage caused by it is usually manifested in two forms, namely: (1) Wear caused by fretting: fretting can cause surface wear between contact surfaces, resulting in material damage. Losses and ...

Examples

Embodiment

[0045] A kind of specific embodiment of the present invention is, a kind of torsion fretting friction and wear test method, and its practice is:

[0046] a. Clamp the upper specimen on the upper fixture, and then fix the lower fixture and the high-precision low-speed turntable through threads, and the vertical centerline of the clamping cavity of the lower fixture is aligned with the rotation axis of the high-precision low-speed turntable, Clamp the spherical lower test piece with the lower clamp;

[0047] b. Control the up and down movement of the upper fixture through the data acquisition control system, so that the upper and lower specimens are in contact with and apply the set load P, and at the same time, through the control of the data acquisition control system, the lower fixture and the lower specimen held by it are controlled by the data acquisition control system. The reciprocating rotation of the set speed ω, rotation angle θ and reciprocating times N realizes the t...

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