Font Size: a A A

Research On The Model Reconstruction And Application Of Reverse Engineering

Posted on:2011-08-24Degree:MasterType:Thesis
Country:ChinaCandidate:X LiFull Text:PDF
GTID:2178330305960186Subject:Aviation Aerospace Manufacturing Engineering
Abstract/Summary:PDF Full Text Request
Reverse engineering(RE),which was applied to develop new products and to introduce advanced technologies,had received most attention both from academia and industry.Reverse engineering could shorten development cycle of new product,reduce cost,prompt independent ability of product development.Therefore,reverse engineering model reconstruction techniques were studied and discussed deeply in this paper.Firstly,studied the key technologies of complex surface digital measurement in reverse engineering. Deeply discussed the surface digital methods, radius compensation, measuring segmentation planning and feature-based path planning.studied complex product molded surface component's digital measurements based on the CMM of Global Classic 9128.In addition,proposed a combined measuring mode which could simultaneously improve the object surface measuring speed and precision.Secondly,studied the reverse-engineering data pre-processing technologies such as singular points elimination,alignment,smoothing,reduction and segmentation,and so on.Based on the angular deviation and chordal deviation,proposed the algorithm of reduction for 3D scanning lines data.And the method was adopted to reduce the data which stored according to the scanning lines in Matlab.Proposed a random data point's curvature estimate method,and analyzed the data segmentation method based on this curvature estimate.Finally,studied the reverse-engineering surface model reconstruction technology,including Bezier,B Spline,NURBS curves and surfaces'basic theory,basic character,fitting methods and precision and fairing's analysis methods,etc….Through the aviation engine's blade of three model restructuring examples based on UG/Imageware argued for the effectivity of model reconstruction methods,surface data gathering methods,and pre-processing methods.In addition,gived the SLS rapid prototyping example of a certain type of seat adjuster part.
Keywords/Search Tags:reverse engineering, CMM, data collection, data pre-processing, surface reconstruction, UG/Imageware, SLS
PDF Full Text Request
Related items