The Study On The Human Soft Tissue Prosthesis By Reverse Engineering Technology

In the recent years, reverse engineering technology is widely applied and isbecoming increasingly important in modern manufacturing field.It not only can beapplied in the traditional sectors of the aerospace industry,automotiveindustry,consumer electronics products,also used in other industries,such asmultimedia and vitual reality,three-dimensional animation,laser engraving industry,and other advanced areas.reverse engineering technology has a wide range ofapplications in the field of medical technology.The main purpose of reverse engineering is the kind reverse.Thethree-demensional sample or model was studied and it can obtained rapidly thephysical outline point cloud data by using three-dimensional digital measuingequipment.And generate a surface digital model which output to a common outputformat,thus obtain the CAD solid model or the data model of manufacturing required.With the development of science and technoloy,reverse manufacturing of thehuman restoration through the use of reverse engineering technology is becomingincreasingly popular.Long time,the forming preparation of human soft tissueprosthesis has been a major problem in the medical filed. This paper studies the newtechnologies of human soft tissue prosthesis.To solve the above problem,this paperpresents that human soft tissue prosthesis was manufactured by using medicalpolymer materials.And presents that human soft tissue prosthesis was obtained byusing the injection molding method which combined the advantages of reverseengineering technology and advanced technology. Thus human soft tissue prosthesiswas manufactured through the use of reverse engineering technology which it madethe medical polymer materials as raw materials.This paper studies the content and conclusions as follows:Firstly， a human nose was studied, the advantages and disadvantages ofnon-contact and contact measurement method was compared. We selected the CTmeasurement of non-contact measurement,and obtained the nose point cloud data byusing the Germany spiral CT scan machine.And select the reasonable point cloud datadenosing,smoothing and streaming pretreatment with the point cloud pretreatment keytechnologies,and,ultimately,we obtained the three-dimensional nose point cloud dataresults after treatment.Secondly，the advantages and disadvantages of the Bezier surface reconstructionmethod and the four sides of the domain NURBS surface reconstruction wascompared.Reconstruction of three-dimensional CAD model of the human nose byusing the four sides of the domain NURBS surface reconstruction method for thepoint cloud data of the three-dimensional nose after pretreatment.And formated dataoutput standard industrial CAD data with Iges.Thirdly，The finite element method was used to simulate the injection moldingprocess simulation of human nose. Flow and warpage analysis was the main contentof the analysis.Finally,through the analysis of simulation results,we can summed upthat the main defects in the injection molding process was warpage.Fourthly，Optimization of the process parameters,such as mold temperature,melttemperature and cooling time,on wraping and influencing elements were studied byusing the orthogonal experiment method to get an optimal combination of thetechnological parameters.The warpage down from0.4545mm to0.3864mm,thewarpage of the molded part has been effectively controlled. The molding productsquality has been significantly improved,which provides good conditions for the finalthe reverse manufacturing stage of human soft tissue prosthesis.