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A Surface Roughness Analysis Method for Studying the Fatigue Resistance of Parts

A surface roughness and analysis method technology, applied in the direction of measuring devices, instruments, etc., can solve problems such as the inability to accurately study and evaluate the anti-fatigue performance of parts, and the inability to compare the degree of influence of anti-fatigue performance

Active Publication Date: 2019-10-25
BEIHANG UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a surface roughness analysis method for studying the fatigue resistance of parts, which solves the problem of the inability to accurately study and evaluate the mechanism and law of the influence of surface roughness on the fatigue resistance of parts, and the inability to compare different processing methods. The technical problem of the degree of influence of the processed surface roughness formed by the method on the fatigue resistance of parts

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  • A Surface Roughness Analysis Method for Studying the Fatigue Resistance of Parts
  • A Surface Roughness Analysis Method for Studying the Fatigue Resistance of Parts
  • A Surface Roughness Analysis Method for Studying the Fatigue Resistance of Parts

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Embodiment Construction

[0034] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0035] The present embodiment provides a surface roughness analysis method for researching the anti-fatigue performance of parts. The method uses the roughness profile curve of the surface profile height Rz of the machined surface of the part as the measured length changes (that is, the roughness profile curve is measured with a length of The abscissa, with the surface profile height Rz as the ordinate) is decoupled into a theoretical curve affected by process conditions and a random curve affected by random factors, wherein both the theoretical curve and the random curve take time as the abscissa, and the surface profile height as Y-axis.

[0036] As above, the decoupling analysis method for the machined surface roughness used to study the fatigue resistance p...

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Abstract

The invention relates to a surface roughness analysis method for researching the fatigue resistance of a component. The method solves the technical problems incapable of accurately researching and evaluating the influence mechanism and law of machined surface roughness on the fatigue resistance of the component, and incapable of comparing the influences of machined surface roughness formed by different machining methods on the fatigue resistance of the component. The surface roughness analysis method for researching the fatigue resistance of a component specifically comprises decoupling the roughness profile curve of the surface profile height, varying with a measured length, of the machined surface of the component into a theoretical curve influenced by a process condition and a random curve influenced by a random factor, wherein the theoretical curve and the random curve both use the time as horizontal coordinates and use the surface profile height as vertical coordinates.

Description

technical field [0001] The invention relates to a surface roughness analysis method for studying the anti-fatigue performance of parts. Background technique [0002] Surface roughness refers to the small spacing and unevenness of small peaks and valleys on the processed surface. It is an important surface integrity index. The value directly reflects the quality of the processed surface of the part. It is simple and easy to implement, so it is widely used in actual production inspection and technical research. The detection and analysis of surface roughness usually use the two indicators of arithmetic mean deviation Ra and maximum contour height Rz, both of which can inspect and evaluate the machined surface quality of parts. At the same time, the analysis of Ra and Rz is generally used to study the mechanism and law of the influence of surface roughness on the fatigue performance of specimens. However, using the above method to study the mechanism and law of the influence ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/30
CPCG01B21/30
Inventor 李勋官椿明王逸轩
Owner BEIHANG UNIV
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