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Part remanufacturing method based on reverse engineering

A reverse engineering and component technology, applied in image analysis, instrumentation, calculation, etc., can solve the problems of difficult standardization and quantification of repair methods and parameters

Active Publication Date: 2015-04-01
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that repair methods and parameters are difficult to standardize and quantify in the remanufacturing process of waste parts and components

Method used

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  • Part remanufacturing method based on reverse engineering
  • Part remanufacturing method based on reverse engineering
  • Part remanufacturing method based on reverse engineering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for remanufacturing components based on reverse engineering, comprising the following steps:

[0029] 1) Obtain the surface point cloud data model of waste parts. see figure 2 , in the figure, the ATOS optical three-dimensional scanner is used to collect data on waste parts. This equipment has strong mobility and fast data collection speed, and can obtain surface point cloud data of various parts. In the embodiment, the surface of the waste parts to be tested is sprayed with a white developer before collection to enhance the effect. The collected results are as image 3 .

[0030] In an embodiment, preferably, for image 3 The shown acquisitions were pre-processed (filtering, noise removal, data reduction, etc.) to obtain results such as Figure 4 The surface point cloud data model of the scrap parts shown can be used as the processing object in the next step.

[0031] 2) Obtain the original CAD model (unworn) of the scrap parts. In this embodiment, the...

Embodiment 2

[0037] During the repair process of waste parts, the original CAD file of the part may be lost. At this time, the original CAD model needs to be reconstructed according to the residual information in the collected surface point cloud data. Different from traditional reverse modeling, when reconstructing the original CAD model of waste parts, because the collected point cloud data contains the damage area of ​​the part, this part of the point cloud data is not continuous with the point cloud of other intact areas, and cannot Reflect the original surface topography of the parts, so the point cloud data of the damaged area should be avoided during reverse reconstruction.

[0038] The main steps of this embodiment are the same as those of Embodiment 1, except that the original CAD model described in step 2) needs to be obtained through the following steps.

[0039] In the embodiment, by calculating the Gaussian curvature of each point in the point cloud data, the points where the ...

Embodiment 3

[0054] The main steps of this embodiment are the same as those of Embodiment 1, and further, an improved registration method suitable for step 3) is disclosed.

[0055] It is worth noting that the registration of the surface point cloud data model of waste parts and the original CAD model is the key to obtain the maximum damage depth. The registration between the two models usually requires two steps of pre-registration and fine registration. Pre-registration Accurate is to roughly adjust the two models to the correct position, provide a good initial value for accurate registration, and improve the efficiency of accurate registration. The methods of pre-registration mainly include principal component analysis, moment axis method, three-point alignment method, etc. . Accurate registration is to further correct the positions of the two models on the basis of pre-registration to minimize the difference between the two models. Among the precise registration algorithms, the Iterat...

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Abstract

The invention discloses a part remanufacturing method based on reverse engineering. The part remanufacturing method based on the reverse engineering comprises the following steps: 1) obtaining a surface point cloud data model of a waste part; 2) obtaining the original computer aided design (CAD) model of the waste part; 3) matching the surface point cloud data model of the step 1) with the original CAD model of the step 2); 4) according to the matching result of the step 3), obtaining the maximum damage depth of the waste part; and 5) if the maximum damage depth obtained in the step 4) is lower than the threshold, using the maximum damage depth as the feed rate, and performing the reducing-type repair to the waste part, if the maximum damage depth obtained in the step 4) is higher than the threshold, performing the adding-type repair to the waste part.

Description

technical field [0001] The invention relates to the field of mechanical remanufacturing. Background technique [0002] With the increasing shortage of resources and environmental problems, remanufacturing engineering has received extensive attention. Remanufacturing can maximize the development and utilization of the value contained in waste resources, alleviate the contradiction between resource shortage and waste of resources, and reduce the environmental hazards of a large number of invalid and scrapped products. It is the best form and resource utilization of waste mechanical and electrical products The preferred way is an important means of saving resources. [0003] However, the current remanufacturing process of waste parts has many problems such as manual participation, strong experience dependence, low repair efficiency, poor reliability, and irreversible repair process. Contents of the invention [0004] The purpose of the invention is to solve the problem that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06T7/00
Inventor 李聪波顾小进李玲玲易茜肖卫洪赵来杰
Owner CHONGQING UNIV
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