Testing device for fretting friction and wearing under prestressing force
A wear test and fretting friction technology, used in measuring devices, using repetitive force/pulse force to test material strength, and test wear resistance, etc., can solve problems such as lack, and achieve compact size, reliable principle, and precise and stable transmission. Effect
Inactive Publication Date: 2019-04-26
JILIN UNIV
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Problems solved by technology
However, there are few reports on the fretting friction and wear of materials under prestressed conditions. The main reason is that there is still a lack of effective test equipment for fretting wear and tear of materials under prestressed conditions.
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Embodiment Construction
[0021] The detailed content of the present invention and its specific implementation will be further described below in conjunction with the accompanying drawings.
[0022] see figure 1 and figure 2 As shown, the fretting friction and wear test device under prestress of the present invention combines fretting friction with traditional material tensile performance testing in a breakthrough, and achieves precise loading through electric cylinders and precise control through piezoelectric drives. A comprehensive and multi-functional precision friction and wear test device can monitor the friction and wear behavior of specific materials during this process, and provide a test method for revealing its friction characteristics and damage methods under special working conditions. The present invention is a vertical three-dimensional arrangement structure as a whole, which increases the integration of the platform in an effective space, and is specifically composed of a test pressur...
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The invention relates to a testing device for fretting friction and wearing under prestressing force, and belongs to the field of precision tribology. The device comprises a testing pressure loading unit, a prestressing force loading unit, a reciprocating fretting unit and a data collecting unit, the testing pressure loading unit is arranged on the upper side, power is supplied for the testing pressure loading unit by a precision servo electric cylinder, and precise closed-loop pressure loading is completed; the prestressing loading unit is arranged on the lower side, power is supplied by theprecision servo motor, and precise prestressing force loading is completed by two-stage worm wheel worm rod deceleration mechanisms cooperating with bi-directional lead screw nut pairs; the reciprocating fretting unit is arranged on the upper side, and reciprocating displacement is achieved by the power output by a precision piezoelectrical actuator; the data collecting unit comprises a two-dimensional force sensor, a pulling pressure sensor and the like. The device has the advantages that the principal is reliable, the structure is compact, the synchronization is high, the compensation is accurate, and an effective testing means can be provided for fretting friction and wearing under the working condition of prestressing force.
Description
technical field [0001] The invention relates to the field of material performance testing, in particular to the field of precision tribology, in particular to a fretting friction and wear test device under prestress. It is used for the friction and wear test of the specimen under prestressed conditions, which can evaluate the friction and wear behavior of specific materials during this process, and provide a test method for revealing its wear characteristics and damage mechanism under special working conditions. Background technique [0002] Different from traditional sliding and rolling, fretting (Fretting) refers to the relative movement of two contact surfaces with a very small magnitude, which usually exists in vibration conditions (such as engine operation, airflow fluctuations, thermal cycle stress, fatigue load, In the "approximately fastened" mechanical fittings under electromagnetic vibration, transmission, etc.), the displacement amplitude is on the order of micron...
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Patent Timeline
Login to View More IPC IPC(8): G01N3/56G01N3/38
CPCG01N3/38G01N3/56G01N2203/005G01N2203/0019G01N2203/0005
Inventor 刘欣赵宏伟李磊田媛
Owner JILIN UNIV