Fretting friction testing machine for micro displacement achieved through ultrasonic vibration
A fretting friction and ultrasonic vibration technology, applied in the direction of testing wear resistance, using mechanical devices, measuring devices, etc., can solve the problems of large equipment volume, high use cost, small excitation force, etc., and achieve simple equipment structure and use. low cost effect
Inactive Publication Date: 2015-04-01
HUAQIAO UNIVERSITY
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Problems solved by technology
The mechanical testing machine has a simple structure, relatively stable amplitude and frequency, and low cost, but the vibration frequency is low, making it difficult to achieve precise control of small displacements; the electromagnetic testing machine can test a large frequency range through a frequency converter, but the system rigidity is insufficient , the excitation force is small, and the stability is poor; the comprehensive performance of the electro-hydraulic servo testing machine is good, but the equipment is large in size and high in cost
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[0031] The content of the present invention will be described in detail through the following examples:
[0032] Please check figure 1 , A fretting friction testing machine with ultrasonic vibration to achieve micro-displacement, including a test piece 5 and a fretting friction head 6 that generates fretting friction with the test piece 5; also includes a base system, an ultrasonic vibration system and a measuring Force system
[0033] The base system includes an optical plate 1, an X-axis sliding table 3, a Y-axis sliding table 2 and a Z-axis sliding table 11; the Y-axis sliding table 2 is slidably mounted on the optical plate 1 and can slide along the Y axis; X The axis slide table 3 is slidably attached to the Y-axis slide table 2 and can slide along the X-axis direction; the Z-axis slide table 11 is slidably attached to the optical plate 1 and can slide along the Z-axis direction; the X-axis direction, Y The axis direction is perpendicular to the Z axis direction;
[0034] Th...
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Abstract
The invention discloses a fretting friction testing machine for micro displacement achieved through ultrasonic vibration. The fretting friction testing machine comprises a tested part, a fretting friction head, a base system, an ultrasonic vibration system and a force measuring system, wherein the ultrasonic vibration system is mounted on the base system; the fretting friction head is fixedly connected with the ultrasonic vibration system; the force measuring system is mounted on the base system; the tested part is fixedly connected with the force measuring system; the relative position of the tested part and the fretting friction head is adjusted through the base system; fretting friction between the fretting friction head and the tested part is achieved through the ultrasonic vibration system; the dynamic change of the force between the fretting friction head and the tested part is detected through the force measuring system. As an ultrasonic vibration generator is adopted to provide micro controllable vibration amplitude, and the vibration direction is perpendicular to a contact plane, tangential fretting friction testing on high-frequency micron-order vibration amplitude is achieved, and meanwhile the fretting friction testing machine is simple in equipment structure, high in measuring precision, low in use cost and simple and convenient to maintain.
Description
Technical field [0001] The invention relates to a fretting friction testing machine capable of realizing micro displacement by ultrasonic vibration. Background technique [0002] Fretting refers to the micron-level relative movement between closely-fitting surfaces in the presence of vibration. The fretting process is accompanied by the phenomenon of friction and wear, which causes the occlusion of the contact surface, the formation of stress corrosion, and accelerates the crack propagation, thereby significantly reducing the fatigue life of the parts. The fretting friction testing machine used in fretting friction research can be divided into three categories: mechanical, electromagnetic and electro-hydraulic servo. The mechanical testing machine has simple structure, relatively stable amplitude and frequency, and low cost, but the vibration frequency is low, and it is difficult to achieve precise control of small displacement; the electromagnetic testing machine can achieve a ...
Claims
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IPC IPC(8): G01N19/02G01N3/56
Inventor 姜峰查旭明王宁昌徐西鹏
Owner HUAQIAO UNIVERSITY