Contact characteristic analysis method based on three-dimensional microscopic surface morphology

A technology of surface topography and analysis methods, applied in special data processing applications, measuring devices, instruments, etc., can solve problems such as failure to consider the influence of contact characteristics, and achieve the effect of improving accuracy

Inactive Publication Date: 2018-06-15
BEIJING UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the contact model constructed by it fails to consider the influence of different scales on the contact characteristics.

Method used

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  • Contact characteristic analysis method based on three-dimensional microscopic surface morphology
  • Contact characteristic analysis method based on three-dimensional microscopic surface morphology
  • Contact characteristic analysis method based on three-dimensional microscopic surface morphology

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing, and embodiment the concrete method of the present invention is described

[0031] 1. Acquisition of microscopic surface topography

[0032] The specific steps to obtain the surface topography by using the three-dimensional surface topography measuring instrument are as follows:

[0033] According to the desired resolution, select an optical measurement probe with a suitable range; set the size of the sampling area and the sampling step. First, put the workpiece in an alcohol solution for ultrasonic cleaning for 15 minutes. After cleaning, dry the workpiece with compressed air and clean the surface of the specimen before measurement to ensure that the surface is free of impurities. Secondly, set the sampling area and sampling step in the acquisition software. In this example, the size of the sampling area is 3mm×3mm, and the sampling step is 0.004mm. The obtained surface is as figure 1 shown.

[0034] 2. Multi-scale de...

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Abstract

The invention discloses a contact characteristic analysis method based on three-dimensional microscopic surface morphology, and is suitable for researching the contact rigidity and the contact dampingof the combined surface based on the multi-scale theory. According to the method, the surface morphology of the combined surface is obtained through a three-dimensional morphology measuring instrument, and multi-scale decomposition reconstruction is carried out through wavelet transformation, and a three-dimensional entity model for the data of separated different frequency bands. Due to the factthat the established contact model is based on real surface data and influences of different scales are considered, the accuracy of the contact model is improved to a great extent, and the research of the contact characteristic of the combined surface is closer to the actual situation. The real surface morphology height matrix is subjected to multi-scale separation by wavelet transformation, andthe three-dimensional entity model for the data of the separated different frequency bands. Due to the fact that the established contact model is based on real surface data and influences of differentscales are considered, the accuracy of the contact model is improved to a great extent.

Description

technical field [0001] The invention relates to an analysis method of multi-scale contact characteristics, which analyzes the multi-scale contact characteristics of a joint surface based on the real microscopic appearance of the contact surface, and is suitable for the research of the contact stiffness and contact damping of the joint surface based on the multi-scale theory. Background technique [0002] Machined surfaces are rough on a microscopic scale. When two solid surfaces are in contact, it is actually a contact between two surface asperities, and the real contact area only accounts for a very small part of the nominal area. Therefore, the real surface topography has an important influence on the contact characteristics of the bonding surface. [0003] Chinese patent CN104809357A proposes a method and device for analyzing the multi-scale contact behavior of three-dimensional rough surfaces, which performs multi-scale separation of rough surfaces to obtain intermediat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/20G06F17/30
CPCG01B21/20G06F16/00
Inventor 蔡力钢魏雅红刘志峰李迎刘强吕华锋
Owner BEIJING UNIV OF TECH
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